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Diffstat (limited to 'contrib/llvm-project/lldb/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h')
| -rw-r--r-- | contrib/llvm-project/lldb/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h b/contrib/llvm-project/lldb/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h new file mode 100644 index 000000000000..fbecd1d27063 --- /dev/null +++ b/contrib/llvm-project/lldb/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h @@ -0,0 +1,182 @@ +//===-- ObjectContainerBSDArchive.h -----------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLDB_SOURCE_PLUGINS_OBJECTCONTAINER_BSD_ARCHIVE_OBJECTCONTAINERBSDARCHIVE_H +#define LLDB_SOURCE_PLUGINS_OBJECTCONTAINER_BSD_ARCHIVE_OBJECTCONTAINERBSDARCHIVE_H + +#include "lldb/Core/UniqueCStringMap.h" +#include "lldb/Symbol/ObjectContainer.h" +#include "lldb/Utility/ArchSpec.h" +#include "lldb/Utility/ConstString.h" +#include "lldb/Utility/FileSpec.h" + +#include "llvm/Object/Archive.h" +#include "llvm/Support/Chrono.h" +#include "llvm/Support/Path.h" + +#include <map> +#include <memory> +#include <mutex> + +enum class ArchiveType { Invalid, Archive, ThinArchive }; + +class ObjectContainerBSDArchive : public lldb_private::ObjectContainer { +public: + ObjectContainerBSDArchive(const lldb::ModuleSP &module_sp, + lldb::DataBufferSP &data_sp, + lldb::offset_t data_offset, + const lldb_private::FileSpec *file, + lldb::offset_t offset, lldb::offset_t length, + ArchiveType archive_type); + + ~ObjectContainerBSDArchive() override; + + // Static Functions + static void Initialize(); + + static void Terminate(); + + static llvm::StringRef GetPluginNameStatic() { return "bsd-archive"; } + + static llvm::StringRef GetPluginDescriptionStatic() { + return "BSD Archive object container reader."; + } + + static lldb_private::ObjectContainer * + CreateInstance(const lldb::ModuleSP &module_sp, lldb::DataBufferSP &data_sp, + lldb::offset_t data_offset, const lldb_private::FileSpec *file, + lldb::offset_t offset, lldb::offset_t length); + + static size_t GetModuleSpecifications(const lldb_private::FileSpec &file, + lldb::DataBufferSP &data_sp, + lldb::offset_t data_offset, + lldb::offset_t file_offset, + lldb::offset_t length, + lldb_private::ModuleSpecList &specs); + + static ArchiveType MagicBytesMatch(const lldb_private::DataExtractor &data); + + // Member Functions + bool ParseHeader() override; + + size_t GetNumObjects() const override { + if (m_archive_sp) + return m_archive_sp->GetNumObjects(); + return 0; + } + + lldb::ObjectFileSP GetObjectFile(const lldb_private::FileSpec *file) override; + + // PluginInterface protocol + llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); } + +protected: + struct Object { + Object(); + + void Clear(); + + lldb::offset_t ExtractFromThin(const lldb_private::DataExtractor &data, + lldb::offset_t offset, + llvm::StringRef stringTable); + + lldb::offset_t Extract(const lldb_private::DataExtractor &data, + lldb::offset_t offset); + /// Object name in the archive. + lldb_private::ConstString ar_name; + + /// Object modification time in the archive. + uint32_t modification_time = 0; + + /// Object size in bytes in the archive. + uint32_t size = 0; + + /// File offset in bytes from the beginning of the file of the object data. + lldb::offset_t file_offset = 0; + + /// Length of the object data. + lldb::offset_t file_size = 0; + + void Dump() const; + }; + + class Archive { + public: + typedef std::shared_ptr<Archive> shared_ptr; + typedef std::multimap<lldb_private::FileSpec, shared_ptr> Map; + + Archive(const lldb_private::ArchSpec &arch, + const llvm::sys::TimePoint<> &mod_time, lldb::offset_t file_offset, + lldb_private::DataExtractor &data, ArchiveType archive_type); + + ~Archive(); + + static Map &GetArchiveCache(); + + static std::recursive_mutex &GetArchiveCacheMutex(); + + static Archive::shared_ptr FindCachedArchive( + const lldb_private::FileSpec &file, const lldb_private::ArchSpec &arch, + const llvm::sys::TimePoint<> &mod_time, lldb::offset_t file_offset); + + static Archive::shared_ptr ParseAndCacheArchiveForFile( + const lldb_private::FileSpec &file, const lldb_private::ArchSpec &arch, + const llvm::sys::TimePoint<> &mod_time, lldb::offset_t file_offset, + lldb_private::DataExtractor &data, ArchiveType archive_type); + + size_t GetNumObjects() const { return m_objects.size(); } + + const Object *GetObjectAtIndex(size_t idx) { + if (idx < m_objects.size()) + return &m_objects[idx]; + return nullptr; + } + + size_t ParseObjects(); + + Object *FindObject(lldb_private::ConstString object_name, + const llvm::sys::TimePoint<> &object_mod_time); + + lldb::offset_t GetFileOffset() const { return m_file_offset; } + + const llvm::sys::TimePoint<> &GetModificationTime() { + return m_modification_time; + } + + const lldb_private::ArchSpec &GetArchitecture() const { return m_arch; } + + void SetArchitecture(const lldb_private::ArchSpec &arch) { m_arch = arch; } + + bool HasNoExternalReferences() const; + + lldb_private::DataExtractor &GetData() { return m_data; } + + ArchiveType GetArchiveType() { return m_archive_type; } + + protected: + typedef lldb_private::UniqueCStringMap<uint32_t> ObjectNameToIndexMap; + // Member Variables + lldb_private::ArchSpec m_arch; + llvm::sys::TimePoint<> m_modification_time; + lldb::offset_t m_file_offset; + std::vector<Object> m_objects; + ObjectNameToIndexMap m_object_name_to_index_map; + lldb_private::DataExtractor m_data; ///< The data for this object container + ///so we don't lose data if the .a files + ///gets modified + ArchiveType m_archive_type; + }; + + void SetArchive(Archive::shared_ptr &archive_sp); + + Archive::shared_ptr m_archive_sp; + + ArchiveType m_archive_type; +}; + +#endif // LLDB_SOURCE_PLUGINS_OBJECTCONTAINER_BSD_ARCHIVE_OBJECTCONTAINERBSDARCHIVE_H |