| Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/qtdeclarative/src/qtdeclarative/src/qml/compiler/qv4compilationunitmapper_unix.cpp |
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| 1 | /**************************************************************************** | - | ||||||
| 2 | ** | - | ||||||
| 3 | ** Copyright (C) 2016 The Qt Company Ltd. | - | ||||||
| 4 | ** Contact: https://www.qt.io/licensing/ | - | ||||||
| 5 | ** | - | ||||||
| 6 | ** This file is part of the QtQml module of the Qt Toolkit. | - | ||||||
| 7 | ** | - | ||||||
| 8 | ** $QT_BEGIN_LICENSE:LGPL$ | - | ||||||
| 9 | ** Commercial License Usage | - | ||||||
| 10 | ** Licensees holding valid commercial Qt licenses may use this file in | - | ||||||
| 11 | ** accordance with the commercial license agreement provided with the | - | ||||||
| 12 | ** Software or, alternatively, in accordance with the terms contained in | - | ||||||
| 13 | ** a written agreement between you and The Qt Company. For licensing terms | - | ||||||
| 14 | ** and conditions see https://www.qt.io/terms-conditions. For further | - | ||||||
| 15 | ** information use the contact form at https://www.qt.io/contact-us. | - | ||||||
| 16 | ** | - | ||||||
| 17 | ** GNU Lesser General Public License Usage | - | ||||||
| 18 | ** Alternatively, this file may be used under the terms of the GNU Lesser | - | ||||||
| 19 | ** General Public License version 3 as published by the Free Software | - | ||||||
| 20 | ** Foundation and appearing in the file LICENSE.LGPL3 included in the | - | ||||||
| 21 | ** packaging of this file. Please review the following information to | - | ||||||
| 22 | ** ensure the GNU Lesser General Public License version 3 requirements | - | ||||||
| 23 | ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. | - | ||||||
| 24 | ** | - | ||||||
| 25 | ** GNU General Public License Usage | - | ||||||
| 26 | ** Alternatively, this file may be used under the terms of the GNU | - | ||||||
| 27 | ** General Public License version 2.0 or (at your option) the GNU General | - | ||||||
| 28 | ** Public license version 3 or any later version approved by the KDE Free | - | ||||||
| 29 | ** Qt Foundation. The licenses are as published by the Free Software | - | ||||||
| 30 | ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 | - | ||||||
| 31 | ** included in the packaging of this file. Please review the following | - | ||||||
| 32 | ** information to ensure the GNU General Public License requirements will | - | ||||||
| 33 | ** be met: https://www.gnu.org/licenses/gpl-2.0.html and | - | ||||||
| 34 | ** https://www.gnu.org/licenses/gpl-3.0.html. | - | ||||||
| 35 | ** | - | ||||||
| 36 | ** $QT_END_LICENSE$ | - | ||||||
| 37 | ** | - | ||||||
| 38 | ****************************************************************************/ | - | ||||||
| 39 | - | |||||||
| 40 | #include "qv4compilationunitmapper_p.h" | - | ||||||
| 41 | - | |||||||
| 42 | #include <sys/mman.h> | - | ||||||
| 43 | #include <functional> | - | ||||||
| 44 | #include <private/qcore_unix_p.h> | - | ||||||
| 45 | #include <private/qdeferredcleanup_p.h> | - | ||||||
| 46 | #include <QDateTime> | - | ||||||
| 47 | - | |||||||
| 48 | #include "qv4compileddata_p.h" | - | ||||||
| 49 | - | |||||||
| 50 | QT_BEGIN_NAMESPACE | - | ||||||
| 51 | - | |||||||
| 52 | using namespace QV4; | - | ||||||
| 53 | - | |||||||
| 54 | CompiledData::Unit *CompilationUnitMapper::open(const QString &cacheFileName, const QDateTime &sourceTimeStamp, QString *errorString) | - | ||||||
| 55 | { | - | ||||||
| 56 | close(); | - | ||||||
| 57 | - | |||||||
| 58 | int fd = qt_safe_open(QFile::encodeName(cacheFileName).constData(), O_RDONLY); | - | ||||||
| 59 | if (fd == -1) {
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| 60 | *errorString = qt_error_string(errno); | - | ||||||
| 61 | return nullptr; executed 2839 times by 126 tests: return nullptr;Executed by:
| 2839 | ||||||
| 62 | } | - | ||||||
| 63 | - | |||||||
| 64 | QDeferredCleanup cleanup([fd]{ | - | ||||||
| 65 | qt_safe_close(fd) ; | - | ||||||
| 66 | }); executed 9642 times by 125 tests: end of blockExecuted by:
| 9642 | ||||||
| 67 | - | |||||||
| 68 | CompiledData::Unit header; | - | ||||||
| 69 | qint64 bytesRead = qt_safe_read(fd, reinterpret_cast<char *>(&header), sizeof(header)); | - | ||||||
| 70 | - | |||||||
| 71 | if (bytesRead != sizeof(header)) {
| 0-9642 | ||||||
| 72 | *errorString = QStringLiteral("File too small for the header fields"); | - | ||||||
| 73 | return nullptr; never executed: return nullptr; | 0 | ||||||
| 74 | } | - | ||||||
| 75 | - | |||||||
| 76 | if (!header.verifyHeader(sourceTimeStamp, errorString))
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| 77 | return nullptr; executed 300 times by 33 tests: return nullptr;Executed by:
| 300 | ||||||
| 78 | - | |||||||
| 79 | // Data structure and qt version matched, so now we can access the rest of the file safely. | - | ||||||
| 80 | - | |||||||
| 81 | length = static_cast<size_t>(lseek(fd, 0, SEEK_END)); | - | ||||||
| 82 | - | |||||||
| 83 | void *ptr = mmap(nullptr, length, PROT_READ, MAP_SHARED, fd, /*offset*/0); | - | ||||||
| 84 | if (ptr == MAP_FAILED) {
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| 85 | *errorString = qt_error_string(errno); | - | ||||||
| 86 | return nullptr; never executed: return nullptr; | 0 | ||||||
| 87 | } | - | ||||||
| 88 | dataPtr = ptr; | - | ||||||
| 89 | - | |||||||
| 90 | return reinterpret_cast<CompiledData::Unit*>(dataPtr); executed 9342 times by 125 tests: return reinterpret_cast<CompiledData::Unit*>(dataPtr);Executed by:
| 9342 | ||||||
| 91 | } | - | ||||||
| 92 | - | |||||||
| 93 | void CompilationUnitMapper::close() | - | ||||||
| 94 | { | - | ||||||
| 95 | // Do not unmap the data here. | - | ||||||
| 96 | if (dataPtr != nullptr) {
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| 97 | // Do not unmap cache files that are built with the StaticData flag. That's the majority of | - | ||||||
| 98 | // them and it's necessary to benefit from the QString literal optimization. There might | - | ||||||
| 99 | // still be QString instances around that point into that memory area. The memory is backed | - | ||||||
| 100 | // on the disk, so the kernel is free to release the pages and all that remains is the | - | ||||||
| 101 | // address space allocation. | - | ||||||
| 102 | if (!(reinterpret_cast<CompiledData::Unit*>(dataPtr)->flags & CompiledData::Unit::StaticData))
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| 103 | munmap(dataPtr, length); never executed: munmap(dataPtr, length); | 0 | ||||||
| 104 | } executed 8852 times by 121 tests: end of blockExecuted by:
| 8852 | ||||||
| 105 | dataPtr = nullptr; | - | ||||||
| 106 | } executed 24472 times by 126 tests: end of blockExecuted by:
| 24472 | ||||||
| 107 | - | |||||||
| 108 | QT_END_NAMESPACE | - | ||||||
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