| 1 | // Copyright (C) 2024 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qsymbolsresolveutils_p.h" |
| 5 | |
| 6 | #include <qdebug.h> |
| 7 | #include <algorithm> |
| 8 | #include <qloggingcategory.h> |
| 9 | |
| 10 | QT_BEGIN_NAMESPACE |
| 11 | |
| 12 | static Q_LOGGING_CATEGORY(qLcSymbolsResolver, "qt.multimedia.symbolsresolver"); |
| 13 | |
| 14 | bool SymbolsResolver::isLazyLoadEnabled() |
| 15 | { |
| 16 | static const bool lazyLoad = |
| 17 | !static_cast<bool>(qEnvironmentVariableIntValue(varName: "QT_INSTANT_LOAD_FFMPEG_STUBS")); |
| 18 | return lazyLoad; |
| 19 | } |
| 20 | |
| 21 | SymbolsResolver::SymbolsResolver(const char *libLoggingName, LibraryLoader loader) |
| 22 | : m_libLoggingName(libLoggingName) |
| 23 | { |
| 24 | Q_ASSERT(libLoggingName); |
| 25 | Q_ASSERT(loader); |
| 26 | |
| 27 | auto library = loader(); |
| 28 | if (library && library->isLoaded()) |
| 29 | m_library = std::move(library); |
| 30 | else |
| 31 | qCWarning(qLcSymbolsResolver) << "Couldn't load"<< m_libLoggingName << "library"; |
| 32 | } |
| 33 | |
| 34 | SymbolsResolver::SymbolsResolver(const char *libName, const char *version, |
| 35 | const char *libLoggingName) |
| 36 | : m_libLoggingName(libLoggingName ? libLoggingName : libName) |
| 37 | { |
| 38 | Q_ASSERT(libName); |
| 39 | Q_ASSERT(version); |
| 40 | |
| 41 | auto library = std::make_unique<QLibrary>(args: QString::fromLocal8Bit(ba: libName), |
| 42 | args: QString::fromLocal8Bit(ba: version)); |
| 43 | if (library->load()) |
| 44 | m_library = std::move(library); |
| 45 | else |
| 46 | qCWarning(qLcSymbolsResolver) << "Couldn't load"<< m_libLoggingName << "library"; |
| 47 | } |
| 48 | |
| 49 | SymbolsResolver::~SymbolsResolver() |
| 50 | { |
| 51 | if (m_library) |
| 52 | m_library->unload(); |
| 53 | } |
| 54 | |
| 55 | QFunctionPointer SymbolsResolver::initOptionalFunction(const char *funcName) |
| 56 | { |
| 57 | return m_library ? m_library->resolve(symbol: funcName) : nullptr; |
| 58 | } |
| 59 | |
| 60 | QFunctionPointer SymbolsResolver::initFunction(const char *funcName) |
| 61 | { |
| 62 | QFunctionPointer func = initOptionalFunction(funcName); |
| 63 | |
| 64 | if (!func && m_library) |
| 65 | { |
| 66 | qCWarning(qLcSymbolsResolver) << "Couldn't resolve"<< m_libLoggingName << "symbol"<< funcName; |
| 67 | m_library->unload(); |
| 68 | m_library.reset(); |
| 69 | } |
| 70 | |
| 71 | return func; |
| 72 | } |
| 73 | |
| 74 | void SymbolsResolver::checkLibrariesLoaded(SymbolsMarker *begin, SymbolsMarker *end) |
| 75 | { |
| 76 | if (m_library) { |
| 77 | qCDebug(qLcSymbolsResolver) << m_libLoggingName << "symbols resolved"; |
| 78 | } else { |
| 79 | const auto size = reinterpret_cast<char *>(end) - reinterpret_cast<char *>(begin); |
| 80 | memset(s: begin, c: 0, n: size); |
| 81 | qCWarning(qLcSymbolsResolver) << "Couldn't resolve"<< m_libLoggingName << "symbols"; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | QT_END_NAMESPACE |
| 86 |