diff options
Diffstat (limited to 'contrib/llvm-project/lldb/source/Symbol/ObjectFile.cpp')
| -rw-r--r-- | contrib/llvm-project/lldb/source/Symbol/ObjectFile.cpp | 258 |
1 files changed, 116 insertions, 142 deletions
diff --git a/contrib/llvm-project/lldb/source/Symbol/ObjectFile.cpp b/contrib/llvm-project/lldb/source/Symbol/ObjectFile.cpp index 6b552dd0c19e..f5dcbc5467f7 100644 --- a/contrib/llvm-project/lldb/source/Symbol/ObjectFile.cpp +++ b/contrib/llvm-project/lldb/source/Symbol/ObjectFile.cpp @@ -28,143 +28,121 @@ using namespace lldb_private; char ObjectFile::ID; +static ObjectFileSP +CreateObjectFromContainer(const lldb::ModuleSP &module_sp, const FileSpec *file, + lldb::offset_t file_offset, lldb::offset_t file_size, + DataBufferSP &data_sp, lldb::offset_t &data_offset) { + ObjectContainerCreateInstance callback; + for (uint32_t idx = 0; + (callback = PluginManager::GetObjectContainerCreateCallbackAtIndex( + idx)) != nullptr; + ++idx) { + std::unique_ptr<ObjectContainer> object_container_up(callback( + module_sp, data_sp, data_offset, file, file_offset, file_size)); + if (object_container_up) + return object_container_up->GetObjectFile(file); + } + return {}; +} + ObjectFileSP ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp, const FileSpec *file, lldb::offset_t file_offset, lldb::offset_t file_size, DataBufferSP &data_sp, lldb::offset_t &data_offset) { - ObjectFileSP object_file_sp; - - if (module_sp) { - static Timer::Category func_cat(LLVM_PRETTY_FUNCTION); - Timer scoped_timer( - func_cat, - "ObjectFile::FindPlugin (module = %s, file = %p, file_offset = " - "0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")", - module_sp->GetFileSpec().GetPath().c_str(), - static_cast<const void *>(file), static_cast<uint64_t>(file_offset), - static_cast<uint64_t>(file_size)); - if (file) { - FileSpec archive_file; - ObjectContainerCreateInstance create_object_container_callback; - - if (!data_sp) { - const bool file_exists = FileSystem::Instance().Exists(*file); - // We have an object name which most likely means we have a .o file in - // a static archive (.a file). Try and see if we have a cached archive - // first without reading any data first - if (file_exists && module_sp->GetObjectName()) { - for (uint32_t idx = 0; - (create_object_container_callback = - PluginManager::GetObjectContainerCreateCallbackAtIndex( - idx)) != nullptr; - ++idx) { - std::unique_ptr<ObjectContainer> object_container_up( - create_object_container_callback(module_sp, data_sp, - data_offset, file, file_offset, - file_size)); - - if (object_container_up) - object_file_sp = object_container_up->GetObjectFile(file); - - if (object_file_sp.get()) - return object_file_sp; - } - } - // Ok, we didn't find any containers that have a named object, now lets - // read the first 512 bytes from the file so the object file and object - // container plug-ins can use these bytes to see if they can parse this - // file. - if (file_size > 0) { - data_sp = FileSystem::Instance().CreateDataBuffer(file->GetPath(), - 512, file_offset); - data_offset = 0; - } - } + LLDB_SCOPED_TIMERF( + "ObjectFile::FindPlugin (module = %s, file = %p, file_offset = " + "0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")", + module_sp->GetFileSpec().GetPath().c_str(), + static_cast<const void *>(file), static_cast<uint64_t>(file_offset), + static_cast<uint64_t>(file_size)); + + if (!module_sp) + return {}; + + if (!file) + return {}; + + if (!data_sp) { + const bool file_exists = FileSystem::Instance().Exists(*file); + // We have an object name which most likely means we have a .o file in + // a static archive (.a file). Try and see if we have a cached archive + // first without reading any data first + if (file_exists && module_sp->GetObjectName()) { + ObjectFileSP object_file_sp = CreateObjectFromContainer( + module_sp, file, file_offset, file_size, data_sp, data_offset); + if (object_file_sp) + return object_file_sp; + } + // Ok, we didn't find any containers that have a named object, now lets + // read the first 512 bytes from the file so the object file and object + // container plug-ins can use these bytes to see if they can parse this + // file. + if (file_size > 0) { + data_sp = FileSystem::Instance().CreateDataBuffer(file->GetPath(), 512, + file_offset); + data_offset = 0; + } + } - if (!data_sp || data_sp->GetByteSize() == 0) { - // Check for archive file with format "/path/to/archive.a(object.o)" - llvm::SmallString<256> path_with_object; - module_sp->GetFileSpec().GetPath(path_with_object); - - ConstString archive_object; - const bool must_exist = true; - if (ObjectFile::SplitArchivePathWithObject( - path_with_object, archive_file, archive_object, must_exist)) { - file_size = FileSystem::Instance().GetByteSize(archive_file); - if (file_size > 0) { - file = &archive_file; - module_sp->SetFileSpecAndObjectName(archive_file, archive_object); - // Check if this is a object container by iterating through all - // object container plugin instances and then trying to get an - // object file from the container plugins since we had a name. - // Also, don't read - // ANY data in case there is data cached in the container plug-ins - // (like BSD archives caching the contained objects within an - // file). - for (uint32_t idx = 0; - (create_object_container_callback = - PluginManager::GetObjectContainerCreateCallbackAtIndex( - idx)) != nullptr; - ++idx) { - std::unique_ptr<ObjectContainer> object_container_up( - create_object_container_callback(module_sp, data_sp, - data_offset, file, - file_offset, file_size)); - - if (object_container_up) - object_file_sp = object_container_up->GetObjectFile(file); - - if (object_file_sp.get()) - return object_file_sp; - } - // We failed to find any cached object files in the container plug- - // ins, so lets read the first 512 bytes and try again below... - data_sp = FileSystem::Instance().CreateDataBuffer( - archive_file.GetPath(), 512, file_offset); - } - } + if (!data_sp || data_sp->GetByteSize() == 0) { + // Check for archive file with format "/path/to/archive.a(object.o)" + llvm::SmallString<256> path_with_object; + module_sp->GetFileSpec().GetPath(path_with_object); + + FileSpec archive_file; + ConstString archive_object; + const bool must_exist = true; + if (ObjectFile::SplitArchivePathWithObject(path_with_object, archive_file, + archive_object, must_exist)) { + file_size = FileSystem::Instance().GetByteSize(archive_file); + if (file_size > 0) { + file = &archive_file; + module_sp->SetFileSpecAndObjectName(archive_file, archive_object); + // Check if this is a object container by iterating through all + // object container plugin instances and then trying to get an + // object file from the container plugins since we had a name. + // Also, don't read + // ANY data in case there is data cached in the container plug-ins + // (like BSD archives caching the contained objects within an + // file). + ObjectFileSP object_file_sp = CreateObjectFromContainer( + module_sp, file, file_offset, file_size, data_sp, data_offset); + if (object_file_sp) + return object_file_sp; + // We failed to find any cached object files in the container plug- + // ins, so lets read the first 512 bytes and try again below... + data_sp = FileSystem::Instance().CreateDataBuffer( + archive_file.GetPath(), 512, file_offset); } + } + } - if (data_sp && data_sp->GetByteSize() > 0) { - // Check if this is a normal object file by iterating through all - // object file plugin instances. - ObjectFileCreateInstance create_object_file_callback; - for (uint32_t idx = 0; - (create_object_file_callback = - PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) != - nullptr; - ++idx) { - object_file_sp.reset(create_object_file_callback( - module_sp, data_sp, data_offset, file, file_offset, file_size)); - if (object_file_sp.get()) - return object_file_sp; - } - - // Check if this is a object container by iterating through all object - // container plugin instances and then trying to get an object file - // from the container. - for (uint32_t idx = 0; - (create_object_container_callback = - PluginManager::GetObjectContainerCreateCallbackAtIndex( - idx)) != nullptr; - ++idx) { - std::unique_ptr<ObjectContainer> object_container_up( - create_object_container_callback(module_sp, data_sp, data_offset, - file, file_offset, file_size)); - - if (object_container_up) - object_file_sp = object_container_up->GetObjectFile(file); - - if (object_file_sp.get()) - return object_file_sp; - } - } + if (data_sp && data_sp->GetByteSize() > 0) { + // Check if this is a normal object file by iterating through all + // object file plugin instances. + ObjectFileCreateInstance callback; + for (uint32_t idx = 0; + (callback = PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) != + nullptr; + ++idx) { + ObjectFileSP object_file_sp(callback(module_sp, data_sp, data_offset, + file, file_offset, file_size)); + if (object_file_sp.get()) + return object_file_sp; } + + // Check if this is a object container by iterating through all object + // container plugin instances and then trying to get an object file + // from the container. + ObjectFileSP object_file_sp = CreateObjectFromContainer( + module_sp, file, file_offset, file_size, data_sp, data_offset); + if (object_file_sp) + return object_file_sp; } + // We didn't find it, so clear our shared pointer in case it contains // anything and return an empty shared pointer - object_file_sp.reset(); - return object_file_sp; + return {}; } ObjectFileSP ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp, @@ -174,9 +152,7 @@ ObjectFileSP ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp, ObjectFileSP object_file_sp; if (module_sp) { - static Timer::Category func_cat(LLVM_PRETTY_FUNCTION); - Timer scoped_timer(func_cat, - "ObjectFile::FindPlugin (module = " + LLDB_SCOPED_TIMERF("ObjectFile::FindPlugin (module = " "%s, process = %p, header_addr = " "0x%" PRIx64 ")", module_sp->GetFileSpec().GetPath().c_str(), @@ -503,6 +479,9 @@ size_t ObjectFile::ReadSectionData(Section *section, return section->GetObjectFile()->ReadSectionData(section, section_offset, dst, dst_len); + if (!section->IsRelocated()) + RelocateSection(section); + if (IsInMemory()) { ProcessSP process_sp(m_process_wp.lock()); if (process_sp) { @@ -514,9 +493,6 @@ size_t ObjectFile::ReadSectionData(Section *section, dst_len, error); } } else { - if (!section->IsRelocated()) - RelocateSection(section); - const lldb::offset_t section_file_size = section->GetFileSize(); if (section_offset < section_file_size) { const size_t section_bytes_left = section_file_size - section_offset; @@ -547,6 +523,9 @@ size_t ObjectFile::ReadSectionData(Section *section, if (section->GetObjectFile() != this) return section->GetObjectFile()->ReadSectionData(section, section_data); + if (!section->IsRelocated()) + RelocateSection(section); + if (IsInMemory()) { ProcessSP process_sp(m_process_wp.lock()); if (process_sp) { @@ -563,17 +542,12 @@ size_t ObjectFile::ReadSectionData(Section *section, } } } - return GetData(section->GetFileOffset(), section->GetFileSize(), - section_data); - } else { - // The object file now contains a full mmap'ed copy of the object file - // data, so just use this - if (!section->IsRelocated()) - RelocateSection(section); - - return GetData(section->GetFileOffset(), section->GetFileSize(), - section_data); } + + // The object file now contains a full mmap'ed copy of the object file + // data, so just use this + return GetData(section->GetFileOffset(), section->GetFileSize(), + section_data); } bool ObjectFile::SplitArchivePathWithObject(llvm::StringRef path_with_object, |