qlibrary.cpp

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1 /**************************************************************************** -

2 ** -

5 ** Contact: https://www.qt.io/licensing/ -

6 ** -

7 ** This file is part of the QtCore module of the Qt Toolkit. -

8 ** -

9 ** $QT_BEGIN_LICENSE:LGPL$ -

10 ** Commercial License Usage -

11 ** Licensees holding valid commercial Qt licenses may use this file in -

12 ** accordance with the commercial license agreement provided with the -

13 ** Software or, alternatively, in accordance with the terms contained in -

14 ** a written agreement between you and The Qt Company. For licensing terms -

15 ** and conditions see https://www.qt.io/terms-conditions. For further -

16 ** information use the contact form at https://www.qt.io/contact-us. -

17 ** -

18 ** GNU Lesser General Public License Usage -

19 ** Alternatively, this file may be used under the terms of the GNU Lesser -

20 ** General Public License version 3 as published by the Free Software -

21 ** Foundation and appearing in the file LICENSE.LGPL3 included in the -

22 ** packaging of this file. Please review the following information to -

23 ** ensure the GNU Lesser General Public License version 3 requirements -

24 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -

25 ** -

26 ** GNU General Public License Usage -

27 ** Alternatively, this file may be used under the terms of the GNU -

28 ** General Public License version 2.0 or (at your option) the GNU General -

29 ** Public license version 3 or any later version approved by the KDE Free -

30 ** Qt Foundation. The licenses are as published by the Free Software -

31 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -

32 ** included in the packaging of this file. Please review the following -

33 ** information to ensure the GNU General Public License requirements will -

34 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and -

35 ** https://www.gnu.org/licenses/gpl-3.0.html. -

36 ** -

37 ** $QT_END_LICENSE$ -

38 ** -

39 ****************************************************************************/ -

40 #include "qplatformdefs.h" -

41 #include "qlibrary.h" -

42 -

43 #ifndef QT_NO_LIBRARY -

44 -

45 #include "qlibrary_p.h" -

46 #include <qstringlist.h> -

47 #include <qfile.h> -

48 #include <qfileinfo.h> -

49 #include <qmutex.h> -

50 #include <qmap.h> -

51 #include <private/qcoreapplication_p.h> -

52 #ifdef Q_OS_MAC -

53 # include <private/qcore_mac_p.h> -

54 #endif -

55 #ifndef NO_ERRNO_H -

56 #include <errno.h> -

57 #endif // NO_ERROR_H -

58 #include <qdebug.h> -

59 #include <qvector.h> -

60 #include <qdir.h> -

61 #include <qendian.h> -

62 #include <qjsondocument.h> -

63 #include <qjsonvalue.h> -

64 #include "qelfparser_p.h" -

65 #include "qmachparser_p.h" -

66 -

67 QT_BEGIN_NAMESPACE -

68 -

69 #ifdef QT_NO_DEBUG -

70 # define QLIBRARY_AS_DEBUG false -

71 #else -

72 # define QLIBRARY_AS_DEBUG true -

73 #endif -

74 -

75 #if defined(Q_OS_UNIX) -

76 // We don't use separate debug and release libs on UNIX, so we want -

77 // to allow loading plugins, regardless of how they were built. -

78 # define QT_NO_DEBUG_PLUGIN_CHECK -

79 #endif -

80 -

81 /*! -

82 \class QLibrary -

83 \inmodule QtCore -

84 \reentrant -

85 \brief The QLibrary class loads shared libraries at runtime. -

86 -

87 -

88 \ingroup plugins -

89 -

90 An instance of a QLibrary object operates on a single shared -

91 object file (which we call a "library", but is also known as a -

92 "DLL"). A QLibrary provides access to the functionality in the -

93 library in a platform independent way. You can either pass a file -

94 name in the constructor, or set it explicitly with setFileName(). -

95 When loading the library, QLibrary searches in all the -

96 system-specific library locations (e.g. \c LD_LIBRARY_PATH on -

97 Unix), unless the file name has an absolute path. -

98 -

99 If the file name is an absolute path then an attempt is made to -

100 load this path first. If the file cannot be found, QLibrary tries -

101 the name with different platform-specific file prefixes, like -

102 "lib" on Unix and Mac, and suffixes, like ".so" on Unix, ".dylib" -

103 on the Mac, or ".dll" on Windows. -

104 -

105 If the file path is not absolute then QLibrary modifies the search -

106 order to try the system-specific prefixes and suffixes first, -

107 followed by the file path specified. -

108 -

109 This makes it possible to specify shared libraries that are only -

110 identified by their basename (i.e. without their suffix), so the -

111 same code will work on different operating systems yet still -

112 minimise the number of attempts to find the library. -

113 -

114 The most important functions are load() to dynamically load the -

115 library file, isLoaded() to check whether loading was successful, -

116 and resolve() to resolve a symbol in the library. The resolve() -

117 function implicitly tries to load the library if it has not been -

118 loaded yet. Multiple instances of QLibrary can be used to access -

119 the same physical library. Once loaded, libraries remain in memory -

120 until the application terminates. You can attempt to unload a -

121 library using unload(), but if other instances of QLibrary are -

122 using the same library, the call will fail, and unloading will -

123 only happen when every instance has called unload(). -

124 -

125 A typical use of QLibrary is to resolve an exported symbol in a -

126 library, and to call the C function that this symbol represents. -

127 This is called "explicit linking" in contrast to "implicit -

128 linking", which is done by the link step in the build process when -

129 linking an executable against a library. -

130 -

131 The following code snippet loads a library, resolves the symbol -

132 "mysymbol", and calls the function if everything succeeded. If -

133 something goes wrong, e.g. the library file does not exist or the -

134 symbol is not defined, the function pointer will be 0 and won't be -

135 called. -

136 -

137 \snippet code/src_corelib_plugin_qlibrary.cpp 0 -

138 -

139 The symbol must be exported as a C function from the library for -

140 resolve() to work. This means that the function must be wrapped in -

141 an \c{extern "C"} block if the library is compiled with a C++ -

142 compiler. On Windows, this also requires the use of a \c dllexport -

143 macro; see resolve() for the details of how this is done. For -

144 convenience, there is a static resolve() function which you can -

145 use if you just want to call a function in a library without -

146 explicitly loading the library first: -

147 -

148 \snippet code/src_corelib_plugin_qlibrary.cpp 1 -

149 -

150 \sa QPluginLoader -

151 */ -

152 -

153 /*! -

154 \enum QLibrary::LoadHint -

155 -

156 This enum describes the possible hints that can be used to change the way -

157 libraries are handled when they are loaded. These values indicate how -

158 symbols are resolved when libraries are loaded, and are specified using -

159 the setLoadHints() function. -

160 -

161 \value ResolveAllSymbolsHint -

162 Causes all symbols in a library to be resolved when it is loaded, not -

163 simply when resolve() is called. -

164 \value ExportExternalSymbolsHint -

165 Exports unresolved and external symbols in the library so that they can be -

166 resolved in other dynamically-loaded libraries loaded later. -

167 \value LoadArchiveMemberHint -

168 Allows the file name of the library to specify a particular object file -

169 within an archive file. -

170 If this hint is given, the filename of the library consists of -

171 a path, which is a reference to an archive file, followed by -

172 a reference to the archive member. -

173 \value PreventUnloadHint -

174 Prevents the library from being unloaded from the address space if close() -

175 is called. The library's static variables are not reinitialized if open() -

176 is called at a later time. -

177 \value DeepBindHint -

178 Instructs the linker to prefer definitions in the loaded library -

179 over exported definitions in the loading application when resolving -

180 external symbols in the loaded library. This option is only supported -

181 on Linux. -

182 -

183 \sa loadHints -

184 */ -

185 -

186 -

187 static long qt_find_pattern(const char *s, ulong s_len, -

188 const char *pattern, ulong p_len) -

189 { -

190 /* -

191 we search from the end of the file because on the supported -

192 systems, the read-only data/text segments are placed at the end -

193 of the file. HOWEVER, when building with debugging enabled, all -

194 the debug symbols are placed AFTER the data/text segments. -

195 -

196 what does this mean? when building in release mode, the search -

197 is fast because the data we are looking for is at the end of the -

198 file... when building in debug mode, the search is slower -

199 because we have to skip over all the debugging symbols first -

200 */ -

201 -

202 if (! s || ! pattern || p_len > s_len) return -1; -

203 ulong i, hs = 0, hp = 0, delta = s_len - p_len; -

204 -

205 for (i = 0; i < p_len; ++i) { -

206 hs += s[delta + i]; -

207 hp += pattern[i]; -

208 } -

209 i = delta; -

210 for (;;) { -

211 if (hs == hp && qstrncmp(s + i, pattern, p_len) == 0) -

212 return i; -

213 if (i == 0) -

214 break; -

215 --i; -

216 hs -= s[i + p_len]; -

217 hs += s[i]; -

218 } -

219 -

220 return -1; -

221 } -

222 -

223 /* -

224 This opens the specified library, mmaps it into memory, and searches -

225 for the QT_PLUGIN_VERIFICATION_DATA. The advantage of this approach is that -

226 we can get the verification data without have to actually load the library. -

227 This lets us detect mismatches more safely. -

228 -

229 Returns \c false if version information is not present, or if the -

230 information could not be read. -

231 Returns true if version information is present and successfully read. -

232 */ -

233 static bool findPatternUnloaded(const QString &library, QLibraryPrivate *lib) -

234 { -

235 QFile file(library); -

236

if (!file.open(QIODevice::ReadOnly)) {

!file.open(QIO...ice::ReadOnly)

Description

TRUE

never evaluated

FALSE

evaluated 1396 times by 113 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

0-1396

237

if (lib)

lib	Description
TRUE	never evaluated
FALSE	never evaluated

238

lib->errorString = file.errorString();

never executed: lib->errorString = file.errorString();

239

if (qt_debug_component()) {

qt_debug_component()	Description
TRUE	never evaluated
FALSE	never evaluated

240 qWarning("%s: %s", (const char*) QFile::encodeName(library), -

241 qPrintable(qt_error_string(errno))); -

242

}

never executed: end of block

243

return false;

never executed: return false;

244 } -

245 -

246 QByteArray data; -

247 const char *filedata = 0; -

248 ulong fdlen = file.size(); -

249 filedata = (char *) file.map(0, fdlen); -

250

if (filedata == 0) {

filedata == 0

Description

TRUE

never evaluated

FALSE

evaluated 1396 times by 113 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

0-1396

251 // try reading the data into memory instead -

252 data = file.readAll(); -

253 filedata = data.constData(); -

254 fdlen = data.size(); -

255

}

never executed: end of block

256 -

257 /* -

258 ELF and Mach-O binaries with GCC have .qplugin sections. -

259 */ -

260 bool hasMetaData = false; -

261 long pos = 0; -

262 char pattern[] = "qTMETADATA "; -

263 pattern[0] = 'Q'; // Ensure the pattern "QTMETADATA" is not found in this library should QPluginLoader ever encounter it. -

264 const ulong plen = qstrlen(pattern); -

265 #if defined (Q_OF_ELF) && defined(Q_CC_GNU) -

266 int r = QElfParser().parse(filedata, fdlen, library, lib, &pos, &fdlen); -

267

if (r == QElfParser::Corrupt || r == QElfParser::NotElf) {

r == QElfParser::Corrupt

Description

TRUE

evaluated 3 times by 1 test

Evaluated by:

tst_QPluginLoader

FALSE

evaluated 1393 times by 113 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

r == QElfParser::NotElf

Description

TRUE

evaluated 716 times by 112 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

FALSE

evaluated 677 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

3-1393

268

if (lib && qt_debug_component()) {

lib

Description

TRUE

evaluated 719 times by 112 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

FALSE

never evaluated

qt_debug_component()

Description

TRUE

never evaluated

FALSE

evaluated 719 times by 112 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

0-719

269 qWarning("QElfParser: %s",qPrintable(lib->errorString)); -

270

}

never executed: end of block

271

return false;

executed 719 times by 112 tests: return false;

Executed by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

719

272

} else if (r == QElfParser::QtMetaDataSection) {

r == QElfParse...etaDataSection

Description

TRUE

evaluated 676 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

FALSE

evaluated 1 time by 1 test

Evaluated by:

tst_QPluginLoader

1-676

273 long rel = qt_find_pattern(filedata + pos, fdlen, pattern, plen); -

274

if (rel < 0)

rel < 0

Description

TRUE

never evaluated

FALSE

evaluated 676 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

0-676

275

pos = -1;

never executed: pos = -1;

276 else -

277

pos += rel;

executed 676 times by 111 tests: pos += rel;

Executed by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

676

278 hasMetaData = true; -

279

}

executed 676 times by 111 tests: end of block

Executed by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

676

280 #elif defined (Q_OF_MACH_O) -

281 { -

282 QString errorString; -

283 int r = QMachOParser::parse(filedata, fdlen, library, &errorString, &pos, &fdlen); -

284 if (r == QMachOParser::NotSuitable) { -

285 if (qt_debug_component()) -

286 qWarning("QMachOParser: %s", qPrintable(errorString)); -

287 if (lib) -

288 lib->errorString = errorString; -

289 return false; -

290 } -

291 // even if the metadata section was not found, the Mach-O parser will -

292 // at least return the boundaries of the right architecture -

293 long rel = qt_find_pattern(filedata + pos, fdlen, pattern, plen); -

294 if (rel < 0) -

295 pos = -1; -

296 else -

297 pos += rel; -

298 hasMetaData = true; -

299 } -

300 #else -

301 pos = qt_find_pattern(filedata, fdlen, pattern, plen); -

302 if (pos > 0) -

303 hasMetaData = true; -

304 #endif // defined(Q_OF_ELF) && defined(Q_CC_GNU) -

305 -

306 bool ret = false; -

307 -

308

if (pos >= 0) {

pos >= 0

Description

TRUE

evaluated 677 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

FALSE

never evaluated

0-677

309

if (hasMetaData) {

hasMetaData

Description

TRUE

evaluated 676 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

FALSE

evaluated 1 time by 1 test

Evaluated by:

tst_QPluginLoader

1-676

310 const char *data = filedata + pos; -

311 QJsonDocument doc = QLibraryPrivate::fromRawMetaDataqJsonFromRawLibraryMetaData(data); -

312 lib->metaData = doc.object(); -

313

if (qt_debug_component())

qt_debug_component()

Description

TRUE

never evaluated

FALSE

evaluated 676 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

0-676

314

qWarning("Found metadata in lib %s, metadata=\n%s\n",

never executed:

QMessageLogger(__FILE__, 314, __PRETTY_FUNCTION__).warning("Found metadata in lib %s, metadata=\n%s\n", library.toLocal8Bit().constData(), doc.toJson().constData());

315

library.toLocal8Bit().constData(), doc.toJson().constData());

never executed:

QMessageLogger(__FILE__, 314, __PRETTY_FUNCTION__).warning("Found metadata in lib %s, metadata=\n%s\n", library.toLocal8Bit().constData(), doc.toJson().constData());

316 ret = !doc.isNull(); -

317

}

executed 676 times by 111 tests: end of block

Executed by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

676

318

}

executed 677 times by 111 tests: end of block

Executed by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

677

319 -

320

if (!ret && lib)

!ret

Description

TRUE

evaluated 1 time by 1 test

Evaluated by:

tst_QPluginLoader

FALSE

evaluated 676 times by 111 tests

Evaluated by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

lib	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QPluginLoader
FALSE	never evaluated

0-676

321

lib->errorString = QLibrary::tr("Failed to extract plugin meta data from '%1'").arg(library);

executed 1 time by 1 test: lib->errorString = QLibrary::tr("Failed to extract plugin meta data from '%1'").arg(library);

Executed by:

tst_QPluginLoader

322 file.close(); -

323

return ret;

executed 677 times by 111 tests: return ret;

Executed by:

tst_NetworkSelfTest
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
tst_QFileIconProvider
tst_QFileSystemModel
tst_QFiledialog
tst_QFocusEvent
...

677

324 } -

325 -

326 static void installCoverageTool(QLibraryPrivate *libPrivate) -

327 { -

328 #ifdef __COVERAGESCANNER__ -

329 /* -

330 __COVERAGESCANNER__ is defined when Qt has been instrumented for code -

331 coverage by TestCocoon. CoverageScanner is the name of the tool that -

332 generates the code instrumentation. -

333 This code is required here when code coverage analysis with TestCocoon -

334 is enabled in order to allow the loading application to register the plugin -

335 and then store its execution report. The execution report gathers information -

336 about each part of the plugin's code that has been used when -

337 the plugin was loaded by the launching application. -

338 The execution report for the plugin will go to the same execution report -

339 as the one defined for the application loading it. -

340 */ -

341 -

342 int ret = __coveragescanner_register_library(libPrivate->fileName.toLocal8Bit()); -

343 -

344 if (qt_debug_component()) { -

345 if (ret >= 0) { -

346 qDebug("coverage data for %s registered", -

347 qPrintable(libPrivate->fileName)); -

348 } else { -

349 qWarning("could not register %s: error %d; coverage data may be incomplete", -

350 qPrintable(libPrivate->fileName), -

351 ret); -

352 } -

353 } -

354 #else -

355 Q_UNUSED(libPrivate); -

356 #endif -

357 } -

358 -

359 class QLibraryStore -

360 { -

361 public: -

362 inline ~QLibraryStore(); -

363 static inline QLibraryPrivate *findOrCreate(const QString &fileName, const QString &version, QLibrary::LoadHints loadHints); -

364 static inline void releaseLibrary(QLibraryPrivate *lib); -

365 -

366 static inline void cleanup(); -

367 -

368 private: -

369 static inline QLibraryStore *instance(); -

370 -

371 // all members and instance() are protected by qt_library_mutex -

372 typedef QMap<QString, QLibraryPrivate*> LibraryMap; -

373 LibraryMap libraryMap; -

374 }; -

375 -

376 static QBasicMutex qt_library_mutex; -

377 static QLibraryStore *qt_library_data = 0; -

378 static bool qt_library_data_once; -

379 -

380 QLibraryStore::~QLibraryStore() -

381 { -

382 qt_library_data = 0; -

383 } -

384 -

385 inline void QLibraryStore::cleanup() -

386 { -

387 QLibraryStore *data = qt_library_data; -

388

if (!data)

!data	Description
TRUE	never evaluated
FALSE	never evaluated

389

return;

never executed: return;

390 -

391 // find any libraries that are still loaded but have a no one attached to them -

392 LibraryMap::Iterator it = data->libraryMap.begin(); -

393

for (; it != data->libraryMap.end(); ++it) {

it != data->libraryMap.end()	Description
TRUE	never evaluated
FALSE	never evaluated

394 QLibraryPrivate *lib = it.value(); -

395

if (lib->libraryRefCount.load() == 1) {

lib->libraryRe...nt.load() == 1	Description
TRUE	never evaluated
FALSE	never evaluated

396

if (lib->libraryUnloadCount.load() > 0) {

lib->libraryUn...unt.load() > 0	Description
TRUE	never evaluated
FALSE	never evaluated

397 Q_ASSERT(lib->pHnd); -

398 lib->libraryUnloadCount.store(1); -

399 #ifdef __GLIBC__ -

400 // glibc has a bug in unloading from global destructors -

401 // see https://bugzilla.novell.com/show_bug.cgi?id=622977 -

402 // and http://sourceware.org/bugzilla/show_bug.cgi?id=11941 -

403 lib->unload(QLibraryPrivate::NoUnloadSys); -

404 #else -

405 lib->unload(); -

406 #endif -

407

}

never executed: end of block

408 delete lib; -

409 it.value() = 0; -

410

}

never executed: end of block

411

}

never executed: end of block

412 -

413

if (qt_debug_component()) {

qt_debug_component()	Description
TRUE	never evaluated
FALSE	never evaluated

414 // dump all objects that remain -

415 foreachfor (QLibraryPrivate *lib ,: qAsConst(data->libraryMap))) { -

416

if (lib)

lib	Description
TRUE	never evaluated
FALSE	never evaluated

417

qDebug() << "On QtCore unload," << lib->fileName << "was leaked, with"

never executed:

QMessageLogger(__FILE__, 417, __PRETTY_FUNCTION__).debug() << "On QtCore unload," << lib->fileName << "was leaked, with" << lib->libraryRefCount.load() << "users";

418

<< lib->libraryRefCount.load() << "users";

never executed:

QMessageLogger(__FILE__, 417, __PRETTY_FUNCTION__).debug() << "On QtCore unload," << lib->fileName << "was leaked, with" << lib->libraryRefCount.load() << "users";

419

}

never executed: end of block

420

}

never executed: end of block

421 -

422 delete data; -

423

}

never executed: end of block

424 -

425 static void qlibraryCleanup() -

426 { -

427 QLibraryStore::cleanup(); -

428 } -

429 Q_DESTRUCTOR_FUNCTION(qlibraryCleanup) -

430 -

431 // must be called with a locked mutex -

432 QLibraryStore *QLibraryStore::instance() -

433 { -

434 if (Q_UNLIKELY(!qt_library_data_once && !qt_library_data)) { -

435 // only create once per process lifetime -

436 qt_library_data = new QLibraryStore; -

437 qt_library_data_once = true; -

438 } -

439 return qt_library_data; -

440 } -

441 -

442 inline QLibraryPrivate *QLibraryStore::findOrCreate(const QString &fileName, const QString &version, -

443 QLibrary::LoadHints loadHints) -

444 { -

445 QMutexLocker locker(&qt_library_mutex); -

446 QLibraryStore *data = instance(); -

447 -

448 // check if this library is already loaded -

449 QLibraryPrivate *lib = 0; -

450 if (Q_LIKELY(data)) { -

451 lib = data->libraryMap.value(fileName); -

452 if (lib) -

453 lib->mergeLoadHints(loadHints); -

454 } -

455 if (!lib) -

456 lib = new QLibraryPrivate(fileName, version, loadHints); -

457 -

458 // track this library -

459 if (Q_LIKELY(data) && !fileName.isEmpty()) -

460 data->libraryMap.insert(fileName, lib); -

461 -

462 lib->libraryRefCount.ref(); -

463 return lib; -

464 } -

465 -

466 inline void QLibraryStore::releaseLibrary(QLibraryPrivate *lib) -

467 { -

468 QMutexLocker locker(&qt_library_mutex); -

469 QLibraryStore *data = instance(); -

470 -

471 if (lib->libraryRefCount.deref()) { -

472 // still in use -

473 return; -

474 } -

475 -

476 // no one else is using -

477 Q_ASSERT(lib->libraryUnloadCount.load() == 0); -

478 -

479 if (Q_LIKELY(data) && !lib->fileName.isEmpty()) { -

480 QLibraryPrivate *that = data->libraryMap.take(lib->fileName); -

481 Q_ASSERT(lib == that); -

482 Q_UNUSED(that); -

483 } -

484 delete lib; -

485 } -

486 -

487 QLibraryPrivate::QLibraryPrivate(const QString &canonicalFileName, const QString &version, QLibrary::LoadHints loadHints) -

488 : pHnd(0), fileName(canonicalFileName), fullVersion(version), instance(0), -

489 libraryRefCount(0), libraryUnloadCount(0), pluginState(MightBeAPlugin) -

490 { -

491 loadHintsInt.store(loadHints); -

492 if (canonicalFileName.isEmpty()) -

493 errorString = QLibrary::tr("The shared library was not found."); -

494 } -

495 -

496 QLibraryPrivate *QLibraryPrivate::findOrCreate(const QString &fileName, const QString &version, -

497 QLibrary::LoadHints loadHints) -

498 { -

499 return QLibraryStore::findOrCreate(fileName, version, loadHints); -

500 } -

501 -

502 QLibraryPrivate::~QLibraryPrivate() -

503 { -

504 } -

505 -

506 void QLibraryPrivate::mergeLoadHints(QLibrary::LoadHints lh) -

507 { -

508 // if the library is already loaded, we can't change the load hints -

509 if (pHnd) -

510 return; -

511 -

512 loadHintsInt.store(lh); -

513 } -

514 -

515 QFunctionPointer QLibraryPrivate::resolve(const char *symbol) -

516 { -

517 if (!pHnd) -

518 return 0; -

519 return resolve_sys(symbol); -

520 } -

521 -

522 void QLibraryPrivate::setLoadHints(QLibrary::LoadHints lh) -

523 { -

524 // this locks a global mutex -

525 QMutexLocker lock(&qt_library_mutex); -

526 mergeLoadHints(lh); -

527 } -

528 -

529 bool QLibraryPrivate::load() -

530 { -

531

if (pHnd) {

pHnd

Description

TRUE

evaluated 2 times by 2 tests

Evaluated by:

tst_QLibrary
tst_QPluginLoader

FALSE

evaluated 530 times by 134 tests

Evaluated by:

tst_Lancelot
tst_NetworkSelfTest
tst_PlatformSocketEngine
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDnsLookup
tst_QDnsLookup_Appless
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
...

2-530

532 libraryUnloadCount.ref(); -

533

return true;

executed 2 times by 2 tests: return true;

Executed by:

tst_QLibrary
tst_QPluginLoader

534 } -

535

if (fileName.isEmpty())

fileName.isEmpty()

Description

TRUE

never evaluated

FALSE

evaluated 530 times by 134 tests

Evaluated by:

tst_Lancelot
tst_NetworkSelfTest
tst_PlatformSocketEngine
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDnsLookup
tst_QDnsLookup_Appless
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
...

0-530

536

return false;

never executed: return false;

537 -

538 bool ret = load_sys(); -

539

if (qt_debug_component()) {

qt_debug_component()

Description

TRUE

never evaluated

FALSE

evaluated 530 times by 134 tests

Evaluated by:

tst_Lancelot
tst_NetworkSelfTest
tst_PlatformSocketEngine
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDnsLookup
tst_QDnsLookup_Appless
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
...

0-530

540

if (ret) {

ret	Description
TRUE	never evaluated
FALSE	never evaluated

541 qDebug() << "loaded library" << fileName; -

542

} else {

never executed: end of block

543 qDebug() << qUtf8Printable(errorString); -

544

}

never executed: end of block

545 } -

546

if (ret) {

ret

Description

TRUE

evaluated 524 times by 134 tests

Evaluated by:

tst_Lancelot
tst_NetworkSelfTest
tst_PlatformSocketEngine
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDnsLookup
tst_QDnsLookup_Appless
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
...

FALSE

evaluated 6 times by 2 tests

Evaluated by:

tst_QLibrary
tst_qlibrary - unknown status

6-524

547 //when loading a library we add a reference to it so that the QLibraryPrivate won't get deleted -

548 //this allows to unload the library at a later time -

549 libraryUnloadCount.ref(); -

550 libraryRefCount.ref(); -

551 installCoverageTool(this); -

552

}

executed 524 times by 134 tests: end of block

Executed by:

tst_Lancelot
tst_NetworkSelfTest
tst_PlatformSocketEngine
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDnsLookup
tst_QDnsLookup_Appless
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
...

524

553 -

554

return ret;

executed 530 times by 134 tests: return ret;

Executed by:

tst_Lancelot
tst_NetworkSelfTest
tst_PlatformSocketEngine
tst_QAbstractItemView
tst_QAbstractNetworkCache
tst_QAbstractPrintDialog
tst_QAbstractScrollArea
tst_QAccessibility
tst_QApplication
tst_QBrush
tst_QButtonGroup
tst_QCalendarWidget
tst_QColorDialog
tst_QColumnView
tst_QComboBox
tst_QCommandLinkButton
tst_QCompleter
tst_QDataStream
tst_QDateTimeEdit
tst_QDialog
tst_QDnsLookup
tst_QDnsLookup_Appless
tst_QDoubleSpinBox
tst_QFactoryLoader
tst_QFileDialog2
...

530

555 } -

556 -

557 bool QLibraryPrivate::unload(UnloadFlag flag) -

558 { -

559 if (!pHnd) -

560 return false; -

561 if (libraryUnloadCount.load() > 0 && !libraryUnloadCount.deref()) { // only unload if ALL QLibrary instance wanted to -

562 delete inst.data(); -

563 if (flag == NoUnloadSys || unload_sys()) { -

564 if (qt_debug_component()) -

565 qWarning() << "QLibraryPrivate::unload succeeded on" << fileName -

566 << (flag == NoUnloadSys ? "(faked)" : ""); -

567 //when the library is unloaded, we release the reference on it so that 'this' -

568 //can get deleted -

569 libraryRefCount.deref(); -

570 pHnd = 0; -

571 instance = 0; -

572 } -

573 } -

574 -

575 return (pHnd == 0); -

576 } -

577 -

578 void QLibraryPrivate::release() -

579 { -

580 QLibraryStore::releaseLibrary(this); -

581 } -

582 -

583 bool QLibraryPrivate::loadPlugin() -

584 { -

585 if (instance) { -

586 libraryUnloadCount.ref(); -

587 return true; -

588 } -

589 if (pluginState == IsNotAPlugin) -

590 return false; -

591 if (load()) { -

592 instance = (QtPluginInstanceFunction)resolve("qt_plugin_instance"); -

593 return instance; -

594 } -

595 if (qt_debug_component()) -

596 qWarning() << "QLibraryPrivate::loadPlugin failed on" << fileName << ":" << errorString; -

597 pluginState = IsNotAPlugin; -

598 return false; -

599 } -

600 -

601 /*! -

602 Returns \c true if \a fileName has a valid suffix for a loadable -

603 library; otherwise returns \c false. -

604 -

605 \table -

606 \header \li Platform \li Valid suffixes -

607 \row \li Windows \li \c .dll, \c .DLL -

608 \row \li Unix/Linux \li \c .so -

609 \row \li AIX \li \c .a -

610 \row \li HP-UX \li \c .sl, \c .so (HP-UXi) -

611 \row \li \macos and iOS \li \c .dylib, \c .bundle, \c .so -

612 \endtable -

613 -

614 Trailing versioning numbers on Unix are ignored. -

615 */ -

616 bool QLibrary::isLibrary(const QString &fileName) -

617 { -

618 #if defined(Q_OS_WIN) -

619 return fileName.endsWith(QLatin1String(".dll"), Qt::CaseInsensitive); -

620 #else -

621 QString completeSuffix = QFileInfo(fileName).completeSuffix(); -

622 if (completeSuffix.isEmpty()) -

623 return false; -

624 QStringList suffixes = completeSuffix.split(QLatin1Char('.')); -

625 # if defined(Q_OS_DARWIN) -

626 -

627 // On Mac, libs look like libmylib.1.0.0.dylib -

628 const QString lastSuffix = suffixes.at(suffixes.count() - 1); -

629 const QString firstSuffix = suffixes.at(0); -

630 -

631 bool valid = (lastSuffix == QLatin1String("dylib") -

632 || firstSuffix == QLatin1String("so") -

633 || firstSuffix == QLatin1String("bundle")); -

634 -

635 return valid; -

636 # else // Generic Unix -

637 QStringList validSuffixList; -

638 -

639 # if defined(Q_OS_HPUX) -

640 /* -

641 See "HP-UX Linker and Libraries User's Guide", section "Link-time Differences between PA-RISC and IPF": -

642 "In PA-RISC (PA-32 and PA-64) shared libraries are suffixed with .sl. In IPF (32-bit and 64-bit), -

643 the shared libraries are suffixed with .so. For compatibility, the IPF linker also supports the .sl suffix." -

644 */ -

645 validSuffixList << QLatin1String("sl"); -

646 # if defined __ia64 -

647 validSuffixList << QLatin1String("so"); -

648 # endif -

649 # elif defined(Q_OS_AIX) -

650 validSuffixList << QLatin1String("a") << QLatin1String("so"); -

651 # elif defined(Q_OS_UNIX) -

652 validSuffixList << QLatin1String("so"); -

653 # endif -

654 -

655 // Examples of valid library names: -

656 // libfoo.so -

657 // libfoo.so.0 -

658 // libfoo.so.0.3 -

659 // libfoo-0.3.so -

660 // libfoo-0.3.so.0.3.0 -

661 -

662 int suffix; -

663 int suffixPos = -1; -

664 for (suffix = 0; suffix < validSuffixList.count() && suffixPos == -1; ++suffix) -

665 suffixPos = suffixes.indexOf(validSuffixList.at(suffix)); -

666 -

667 bool valid = suffixPos != -1; -

668 for (int i = suffixPos + 1; i < suffixes.count() && valid; ++i) -

669 if (i != suffixPos) -

670 suffixes.at(i).toInt(&valid); -

671 return valid; -

672 # endif -

673 #endif -

674 -

675 } -

676 -

677 typedef const char * (*QtPluginQueryVerificationDataFunction)(); -

678 -

679 static bool qt_get_metadata(QtPluginQueryVerificationDataFunction pfn, QLibraryPrivate *priv) -

680 { -

681 const char *szData = 0; -

682

if (!pfn)

!pfn	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tst_QPluginLoader
FALSE	evaluated 2 times by 1 test Evaluated by: tst_QPluginLoader

683

return false;

executed 2 times by 1 test: return false;

Executed by:

tst_QPluginLoader

684 -

685 szData = pfn(); -

686

if (!szData)

!szData	Description
TRUE	never evaluated
FALSE	evaluated 2 times by 1 test Evaluated by: tst_QPluginLoader

0-2

687

return false;

never executed: return false;

688 -

689 QJsonDocument doc = QLibraryPrivate::fromRawMetaDataqJsonFromRawLibraryMetaData(szData); -

690

if (doc.isNull())

doc.isNull()	Description
TRUE	never evaluated
FALSE	evaluated 2 times by 1 test Evaluated by: tst_QPluginLoader

0-2

691

return false;

never executed: return false;

692 priv->metaData = doc.object(); -

693

return true;

executed 2 times by 1 test: return true;

Executed by:

tst_QPluginLoader

694 } -

695 -

696 bool QLibraryPrivate::isPlugin() -

697 { -

698 if (pluginState == MightBeAPlugin) -

699 updatePluginState(); -

700 -

701 return pluginState == IsAPlugin; -

702 } -

703 -

704 void QLibraryPrivate::updatePluginState() -

705 { -

706 errorString.clear(); -

707 if (pluginState != MightBeAPlugin) -

708 return; -

709 -

710 bool success = false; -

711 -

712 #if defined(Q_OS_UNIX) && !defined(Q_OS_MAC) -

713 if (fileName.endsWith(QLatin1String(".debug"))) { -

714 // refuse to load a file that ends in .debug -

715 // these are the debug symbols from the libraries -

716 // the problem is that they are valid shared library files -

717 // and dlopen is known to crash while opening them -

718 -

719 // pretend we didn't see the file -

720 errorString = QLibrary::tr("The shared library was not found."); -

721 pluginState = IsNotAPlugin; -

722 return; -

723 } -

724 #endif -

725 -

726 if (!pHnd) { -

727 // scan for the plugin metadata without loading -

728 success = findPatternUnloaded(fileName, this); -

729 } else { -

730 // library is already loaded (probably via QLibrary) -

731 // simply get the target function and call it. -

732 QtPluginQueryVerificationDataFunction getMetaData = NULL; -

733 getMetaData = (QtPluginQueryVerificationDataFunction) resolve("qt_plugin_query_metadata"); -

734 success = qt_get_metadata(getMetaData, this); -

735 } -

736 -

737 if (!success) { -

738 if (errorString.isEmpty()){ -

739 if (fileName.isEmpty()) -

740 errorString = QLibrary::tr("The shared library was not found."); -

741 else -

742 errorString = QLibrary::tr("The file '%1' is not a valid Qt plugin.").arg(fileName); -

743 } -

744 pluginState = IsNotAPlugin; -

745 return; -

746 } -

747 -

748 pluginState = IsNotAPlugin; // be pessimistic -

749 -

750 uint qt_version = (uint)metaData.value(QLatin1String("version")).toDouble(); -

751 bool debug = metaData.value(QLatin1String("debug")).toBool(); -

752 if ((qt_version & 0x00ff00) > (QT_VERSION & 0x00ff00) || (qt_version & 0xff0000) != (QT_VERSION & 0xff0000)) { -

753 if (qt_debug_component()) { -

754 qWarning("In %s:\n" -

755 " Plugin uses incompatible Qt library (%d.%d.%d) [%s]", -

756 (const char*) QFile::encodeName(fileName), -

757 (qt_version&0xff0000) >> 16, (qt_version&0xff00) >> 8, qt_version&0xff, -

758 debug ? "debug" : "release"); -

759 } -

760 errorString = QLibrary::tr("The plugin '%1' uses incompatible Qt library. (%2.%3.%4) [%5]") -

761 .arg(fileName) -

762 .arg((qt_version&0xff0000) >> 16) -

763 .arg((qt_version&0xff00) >> 8) -

764 .arg(qt_version&0xff) -

765 .arg(debug ? QLatin1String("debug") : QLatin1String("release")); -

766 #ifndef QT_NO_DEBUG_PLUGIN_CHECK -

767 } else if(debug != QLIBRARY_AS_DEBUG) { -

768 //don't issue a qWarning since we will hopefully find a non-debug? --Sam -

769 errorString = QLibrary::tr("The plugin '%1' uses incompatible Qt library." -

770 " (Cannot mix debug and release libraries.)").arg(fileName); -

771 #endif -

772 } else { -

773 pluginState = IsAPlugin; -

774 } -

775 } -

776 -

777 /*! -

778 Loads the library and returns \c true if the library was loaded -

779 successfully; otherwise returns \c false. Since resolve() always -

780 calls this function before resolving any symbols it is not -

781 necessary to call it explicitly. In some situations you might want -

782 the library loaded in advance, in which case you would use this -

783 function. -

784 -

785 \sa unload() -

786 */ -

787 bool QLibrary::load() -

788 { -

789 if (!d) -

790 return false; -

791 if (did_load) -

792 return d->pHnd; -

793 did_load = true; -

794 return d->load(); -

795 } -

796 -

797 /*! -

798 Unloads the library and returns \c true if the library could be -

799 unloaded; otherwise returns \c false. -

800 -

801 This happens automatically on application termination, so you -

802 shouldn't normally need to call this function. -

803 -

804 If other instances of QLibrary are using the same library, the -

805 call will fail, and unloading will only happen when every instance -

806 has called unload(). -

807 -

808 Note that on Mac OS X 10.3 (Panther), dynamic libraries cannot be unloaded. -

809 -

810 \sa resolve(), load() -

811 */ -

812 bool QLibrary::unload() -

813 { -

814 if (did_load) { -

815 did_load = false; -

816 return d->unload(); -

817 } -

818 return false; -

819 } -

820 -

821 /*! -

822 Returns \c true if the library is loaded; otherwise returns \c false. -

823 -

824 \sa load() -

825 */ -

826 bool QLibrary::isLoaded() const -

827 { -

828 return d && d->pHnd; -

829 } -

830 -

831 -

832 /*! -

833 Constructs a library with the given \a parent. -

834 */ -

835 QLibrary::QLibrary(QObject *parent) -

836 :QObject(parent), d(0), did_load(false) -

837 { -

838 } -

839 -

840 -

841 /*! -

842 Constructs a library object with the given \a parent that will -

843 load the library specified by \a fileName. -

844 -

845 We recommend omitting the file's suffix in \a fileName, since -

846 QLibrary will automatically look for the file with the appropriate -

847 suffix in accordance with the platform, e.g. ".so" on Unix, -

848 ".dylib" on \macos and iOS, and ".dll" on Windows. (See \l{fileName}.) -

849 */ -

850 QLibrary::QLibrary(const QString& fileName, QObject *parent) -

851 :QObject(parent), d(0), did_load(false) -

852 { -

853 setFileName(fileName); -

854 } -

855 -

856 -

857 /*! -

858 Constructs a library object with the given \a parent that will -

859 load the library specified by \a fileName and major version number \a verNum. -

860 Currently, the version number is ignored on Windows. -

861 -

862 We recommend omitting the file's suffix in \a fileName, since -

863 QLibrary will automatically look for the file with the appropriate -

864 suffix in accordance with the platform, e.g. ".so" on Unix, -

865 ".dylib" on \macos and iOS, and ".dll" on Windows. (See \l{fileName}.) -

866 */ -

867 QLibrary::QLibrary(const QString& fileName, int verNum, QObject *parent) -

868 :QObject(parent), d(0), did_load(false) -

869 { -

870 setFileNameAndVersion(fileName, verNum); -

871 } -

872 -

873 /*! -

874 Constructs a library object with the given \a parent that will -

875 load the library specified by \a fileName and full version number \a version. -

876 Currently, the version number is ignored on Windows. -

877 -

878 We recommend omitting the file's suffix in \a fileName, since -

879 QLibrary will automatically look for the file with the appropriate -

880 suffix in accordance with the platform, e.g. ".so" on Unix, -

881 ".dylib" on \macos and iOS, and ".dll" on Windows. (See \l{fileName}.) -

882 */ -

883 QLibrary::QLibrary(const QString& fileName, const QString &version, QObject *parent) -

884 :QObject(parent), d(0), did_load(false) -

885 { -

886 setFileNameAndVersion(fileName, version); -

887 } -

888 -

889 /*! -

890 Destroys the QLibrary object. -

891 -

892 Unless unload() was called explicitly, the library stays in memory -

893 until the application terminates. -

894 -

895 \sa isLoaded(), unload() -

896 */ -

897 QLibrary::~QLibrary() -

898 { -

899 if (d) -

900 d->release(); -

901 } -

902 -

903 -

904 /*! -

905 \property QLibrary::fileName -

906 \brief the file name of the library -

907 -

908 We recommend omitting the file's suffix in the file name, since -

909 QLibrary will automatically look for the file with the appropriate -

910 suffix (see isLibrary()). -

911 -

912 When loading the library, QLibrary searches in all system-specific -

913 library locations (for example, \c LD_LIBRARY_PATH on Unix), unless the -

914 file name has an absolute path. After loading the library -

915 successfully, fileName() returns the fully-qualified file name of -

916 the library, including the full path to the library if one was given -

917 in the constructor or passed to setFileName(). -

918 -

919 For example, after successfully loading the "GL" library on Unix -

920 platforms, fileName() will return "libGL.so". If the file name was -

921 originally passed as "/usr/lib/libGL", fileName() will return -

922 "/usr/lib/libGL.so". -

923 */ -

924 -

925 void QLibrary::setFileName(const QString &fileName) -

926 { -

927 QLibrary::LoadHints lh; -

928 if (d) { -

929 lh = d->loadHints(); -

930 d->release(); -

931 d = 0; -

932 did_load = false; -

933 } -

934 d = QLibraryPrivate::findOrCreate(fileName, QString(), lh); -

935 } -

936 -

937 QString QLibrary::fileName() const -

938 { -

939 if (d) -

940 return d->qualifiedFileName.isEmpty() ? d->fileName : d->qualifiedFileName; -

941 return QString(); -

942 } -

943 -

944 /*! -

945 \fn void QLibrary::setFileNameAndVersion(const QString &fileName, int versionNumber) -

946 -

947 Sets the fileName property and major version number to \a fileName -

948 and \a versionNumber respectively. -

949 The \a versionNumber is ignored on Windows. -

950 -

951 \sa setFileName() -

952 */ -

953 void QLibrary::setFileNameAndVersion(const QString &fileName, int verNum) -

954 { -

955 QLibrary::LoadHints lh; -

956 if (d) { -

957 lh = d->loadHints(); -

958 d->release(); -

959 d = 0; -

960 did_load = false; -

961 } -

962 d = QLibraryPrivate::findOrCreate(fileName, verNum >= 0 ? QString::number(verNum) : QString(), lh); -

963 } -

964 -

965 /*! -

966 \since 4.4 -

967 -

968 Sets the fileName property and full version number to \a fileName -

969 and \a version respectively. -

970 The \a version parameter is ignored on Windows. -

971 -

972 \sa setFileName() -

973 */ -

974 void QLibrary::setFileNameAndVersion(const QString &fileName, const QString &version) -

975 { -

976 QLibrary::LoadHints lh; -

977 if (d) { -

978 lh = d->loadHints(); -

979 d->release(); -

980 d = 0; -

981 did_load = false; -

982 } -

983 d = QLibraryPrivate::findOrCreate(fileName, version, lh); -

984 } -

985 -

986 /*! -

987 Returns the address of the exported symbol \a symbol. The library is -

988 loaded if necessary. The function returns 0 if the symbol could -

989 not be resolved or if the library could not be loaded. -

990 -

991 Example: -

992 \snippet code/src_corelib_plugin_qlibrary.cpp 2 -

993 -

994 The symbol must be exported as a C function from the library. This -

995 means that the function must be wrapped in an \c{extern "C"} if -

996 the library is compiled with a C++ compiler. On Windows you must -

997 also explicitly export the function from the DLL using the -

998 \c{__declspec(dllexport)} compiler directive, for example: -

999 -

1000 \snippet code/src_corelib_plugin_qlibrary.cpp 3 -

1001 -

1002 with \c MY_EXPORT defined as -

1003 -

1004 \snippet code/src_corelib_plugin_qlibrary.cpp 4 -

1005 */ -

1006 QFunctionPointer QLibrary::resolve(const char *symbol) -

1007 { -

1008 if (!isLoaded() && !load()) -

1009 return 0; -

1010 return d->resolve(symbol); -

1011 } -

1012 -

1013 /*! -

1014 \overload -

1015 -

1016 Loads the library \a fileName and returns the address of the -

1017 exported symbol \a symbol. Note that \a fileName should not -

1018 include the platform-specific file suffix; (see \l{fileName}). The -

1019 library remains loaded until the application exits. -

1020 -

1021 The function returns 0 if the symbol could not be resolved or if -

1022 the library could not be loaded. -

1023 -

1024 \sa resolve() -

1025 */ -

1026 QFunctionPointer QLibrary::resolve(const QString &fileName, const char *symbol) -

1027 { -

1028 QLibrary library(fileName); -

1029 return library.resolve(symbol); -

1030 } -

1031 -

1032 /*! -

1033 \overload -

1034 -

1035 Loads the library \a fileName with major version number \a verNum and -

1036 returns the address of the exported symbol \a symbol. -

1037 Note that \a fileName should not include the platform-specific file suffix; -

1038 (see \l{fileName}). The library remains loaded until the application exits. -

1039 \a verNum is ignored on Windows. -

1040 -

1041 The function returns 0 if the symbol could not be resolved or if -

1042 the library could not be loaded. -

1043 -

1044 \sa resolve() -

1045 */ -

1046 QFunctionPointer QLibrary::resolve(const QString &fileName, int verNum, const char *symbol) -

1047 { -

1048 QLibrary library(fileName, verNum); -

1049 return library.resolve(symbol); -

1050 } -

1051 -

1052 /*! -

1053 \overload -

1054 \since 4.4 -

1055 -

1056 Loads the library \a fileName with full version number \a version and -

1057 returns the address of the exported symbol \a symbol. -

1058 Note that \a fileName should not include the platform-specific file suffix; -

1059 (see \l{fileName}). The library remains loaded until the application exits. -

1060 \a version is ignored on Windows. -

1061 -

1062 The function returns 0 if the symbol could not be resolved or if -

1063 the library could not be loaded. -

1064 -

1065 \sa resolve() -

1066 */ -

1067 QFunctionPointer QLibrary::resolve(const QString &fileName, const QString &version, const char *symbol) -

1068 { -

1069 QLibrary library(fileName, version); -

1070 return library.resolve(symbol); -

1071 } -

1072 -

1073 /*! -

1074 \since 4.2 -

1075 -

1076 Returns a text string with the description of the last error that occurred. -

1077 Currently, errorString will only be set if load(), unload() or resolve() for some reason fails. -

1078 */ -

1079 QString QLibrary::errorString() const -

1080 { -

1081 return (!d || d->errorString.isEmpty()) ? tr("Unknown error") : d->errorString; -

1082 } -

1083 -

1084 /*! -

1085 \property QLibrary::loadHints -

1086 \brief Give the load() function some hints on how it should behave. -

1087 -

1088 You can give some hints on how the symbols are resolved. Usually, -

1089 the symbols are not resolved at load time, but resolved lazily, -

1090 (that is, when resolve() is called). If you set the loadHints to -

1091 ResolveAllSymbolsHint, then all symbols will be resolved at load time -

1092 if the platform supports it. -

1093 -

1094 Setting ExportExternalSymbolsHint will make the external symbols in the -

1095 library available for resolution in subsequent loaded libraries. -

1096 -

1097 If LoadArchiveMemberHint is set, the file name -

1098 is composed of two components: A path which is a reference to an -

1099 archive file followed by the second component which is the reference to -

1100 the archive member. For instance, the fileName \c libGL.a(shr_64.o) will refer -

1101 to the library \c shr_64.o in the archive file named \c libGL.a. This -

1102 is only supported on the AIX platform. -

1103 -

1104 The interpretation of the load hints is platform dependent, and if -

1105 you use it you are probably making some assumptions on which platform -

1106 you are compiling for, so use them only if you understand the consequences -

1107 of them. -

1108 -

1109 By default, none of these flags are set, so libraries will be loaded with -

1110 lazy symbol resolution, and will not export external symbols for resolution -

1111 in other dynamically-loaded libraries. -

1112 -

1113 \note Setting this property after the library has been loaded has no effect -

1114 and loadHints() will not reflect those changes. -

1115 -

1116 \note This property is shared among all QLibrary instances that refer to -

1117 the same library. -

1118 */ -

1119 void QLibrary::setLoadHints(LoadHints hints) -

1120 { -

1121 if (!d) { -

1122 d = QLibraryPrivate::findOrCreate(QString()); // ugly, but we need a d-ptr -

1123 d->errorString.clear(); -

1124 } -

1125 d->setLoadHints(hints); -

1126 } -

1127 -

1128 QLibrary::LoadHints QLibrary::loadHints() const -

1129 { -

1130 return d ? d->loadHints() : QLibrary::LoadHints(); -

1131 } -

1132 -

1133 /* Internal, for debugging */ -

1134 bool qt_debug_component() -

1135 { -

1136 static int debug_env = QT_PREPEND_NAMESPACE(qEnvironmentVariableIntValue)("QT_DEBUG_PLUGINS"); -

1137 return debug_env != 0; -

1138 } -

1139 -

1140 QT_END_NAMESPACE -

1141 -

1142 #endif // QT_NO_LIBRARY -

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