| //===-- DynamicLoader.cpp ---------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Target/DynamicLoader.h" |
| |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/ModuleList.h" // for ModuleList |
| #include "lldb/Core/ModuleSpec.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/Section.h" |
| #include "lldb/Symbol/ObjectFile.h" // for ObjectFile |
| #include "lldb/Target/MemoryRegionInfo.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Utility/ConstString.h" // for ConstString |
| #include "lldb/lldb-private-interfaces.h" // for DynamicLoaderCreateInstance |
| |
| #include "llvm/ADT/StringRef.h" // for StringRef |
| |
| #include <memory> // for shared_ptr, unique_ptr |
| |
| #include <assert.h> // for assert |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| DynamicLoader *DynamicLoader::FindPlugin(Process *process, |
| const char *plugin_name) { |
| DynamicLoaderCreateInstance create_callback = nullptr; |
| if (plugin_name) { |
| ConstString const_plugin_name(plugin_name); |
| create_callback = |
| PluginManager::GetDynamicLoaderCreateCallbackForPluginName( |
| const_plugin_name); |
| if (create_callback) { |
| std::unique_ptr<DynamicLoader> instance_ap( |
| create_callback(process, true)); |
| if (instance_ap) |
| return instance_ap.release(); |
| } |
| } else { |
| for (uint32_t idx = 0; |
| (create_callback = |
| PluginManager::GetDynamicLoaderCreateCallbackAtIndex(idx)) != |
| nullptr; |
| ++idx) { |
| std::unique_ptr<DynamicLoader> instance_ap( |
| create_callback(process, false)); |
| if (instance_ap) |
| return instance_ap.release(); |
| } |
| } |
| return nullptr; |
| } |
| |
| DynamicLoader::DynamicLoader(Process *process) : m_process(process) {} |
| |
| DynamicLoader::~DynamicLoader() = default; |
| |
| //---------------------------------------------------------------------- |
| // Accessosors to the global setting as to whether to stop at image (shared |
| // library) loading/unloading. |
| //---------------------------------------------------------------------- |
| |
| bool DynamicLoader::GetStopWhenImagesChange() const { |
| return m_process->GetStopOnSharedLibraryEvents(); |
| } |
| |
| void DynamicLoader::SetStopWhenImagesChange(bool stop) { |
| m_process->SetStopOnSharedLibraryEvents(stop); |
| } |
| |
| ModuleSP DynamicLoader::GetTargetExecutable() { |
| Target &target = m_process->GetTarget(); |
| ModuleSP executable = target.GetExecutableModule(); |
| |
| if (executable) { |
| if (executable->GetFileSpec().Exists()) { |
| ModuleSpec module_spec(executable->GetFileSpec(), |
| executable->GetArchitecture()); |
| auto module_sp = std::make_shared<Module>(module_spec); |
| |
| // Check if the executable has changed and set it to the target |
| // executable if they differ. |
| if (module_sp && module_sp->GetUUID().IsValid() && |
| executable->GetUUID().IsValid()) { |
| if (module_sp->GetUUID() != executable->GetUUID()) |
| executable.reset(); |
| } else if (executable->FileHasChanged()) { |
| executable.reset(); |
| } |
| |
| if (!executable) { |
| executable = target.GetSharedModule(module_spec); |
| if (executable.get() != target.GetExecutableModulePointer()) { |
| // Don't load dependent images since we are in dyld where we will |
| // know and find out about all images that are loaded |
| const bool get_dependent_images = false; |
| target.SetExecutableModule(executable, get_dependent_images); |
| } |
| } |
| } |
| } |
| return executable; |
| } |
| |
| void DynamicLoader::UpdateLoadedSections(ModuleSP module, addr_t link_map_addr, |
| addr_t base_addr, |
| bool base_addr_is_offset) { |
| UpdateLoadedSectionsCommon(module, base_addr, base_addr_is_offset); |
| } |
| |
| void DynamicLoader::UpdateLoadedSectionsCommon(ModuleSP module, |
| addr_t base_addr, |
| bool base_addr_is_offset) { |
| bool changed; |
| module->SetLoadAddress(m_process->GetTarget(), base_addr, base_addr_is_offset, |
| changed); |
| } |
| |
| void DynamicLoader::UnloadSections(const ModuleSP module) { |
| UnloadSectionsCommon(module); |
| } |
| |
| void DynamicLoader::UnloadSectionsCommon(const ModuleSP module) { |
| Target &target = m_process->GetTarget(); |
| const SectionList *sections = GetSectionListFromModule(module); |
| |
| assert(sections && "SectionList missing from unloaded module."); |
| |
| const size_t num_sections = sections->GetSize(); |
| for (size_t i = 0; i < num_sections; ++i) { |
| SectionSP section_sp(sections->GetSectionAtIndex(i)); |
| target.SetSectionUnloaded(section_sp); |
| } |
| } |
| |
| const SectionList * |
| DynamicLoader::GetSectionListFromModule(const ModuleSP module) const { |
| SectionList *sections = nullptr; |
| if (module) { |
| ObjectFile *obj_file = module->GetObjectFile(); |
| if (obj_file != nullptr) { |
| sections = obj_file->GetSectionList(); |
| } |
| } |
| return sections; |
| } |
| |
| ModuleSP DynamicLoader::LoadModuleAtAddress(const FileSpec &file, |
| addr_t link_map_addr, |
| addr_t base_addr, |
| bool base_addr_is_offset) { |
| Target &target = m_process->GetTarget(); |
| ModuleList &modules = target.GetImages(); |
| ModuleSpec module_spec(file, target.GetArchitecture()); |
| ModuleSP module_sp; |
| |
| if ((module_sp = modules.FindFirstModule(module_spec))) { |
| UpdateLoadedSections(module_sp, link_map_addr, base_addr, |
| base_addr_is_offset); |
| return module_sp; |
| } |
| |
| if ((module_sp = target.GetSharedModule(module_spec))) { |
| UpdateLoadedSections(module_sp, link_map_addr, base_addr, |
| base_addr_is_offset); |
| return module_sp; |
| } |
| |
| bool check_alternative_file_name = true; |
| if (base_addr_is_offset) { |
| // Try to fetch the load address of the file from the process as we need |
| // absolute load address to read the file out of the memory instead of a |
| // load bias. |
| bool is_loaded = false; |
| lldb::addr_t load_addr; |
| Status error = m_process->GetFileLoadAddress(file, is_loaded, load_addr); |
| if (error.Success() && is_loaded) { |
| check_alternative_file_name = false; |
| base_addr = load_addr; |
| } |
| } |
| |
| // We failed to find the module based on its name. Lets try to check if we |
| // can find a different name based on the memory region info. |
| if (check_alternative_file_name) { |
| MemoryRegionInfo memory_info; |
| Status error = m_process->GetMemoryRegionInfo(base_addr, memory_info); |
| if (error.Success() && memory_info.GetMapped() && |
| memory_info.GetRange().GetRangeBase() == base_addr && |
| !(memory_info.GetName().IsEmpty())) { |
| ModuleSpec new_module_spec( |
| FileSpec(memory_info.GetName().AsCString(), false), |
| target.GetArchitecture()); |
| |
| if ((module_sp = modules.FindFirstModule(new_module_spec))) { |
| UpdateLoadedSections(module_sp, link_map_addr, base_addr, false); |
| return module_sp; |
| } |
| |
| if ((module_sp = target.GetSharedModule(new_module_spec))) { |
| UpdateLoadedSections(module_sp, link_map_addr, base_addr, false); |
| return module_sp; |
| } |
| } |
| } |
| |
| if ((module_sp = m_process->ReadModuleFromMemory(file, base_addr))) { |
| UpdateLoadedSections(module_sp, link_map_addr, base_addr, false); |
| target.GetImages().AppendIfNeeded(module_sp); |
| } |
| |
| return module_sp; |
| } |
| |
| int64_t DynamicLoader::ReadUnsignedIntWithSizeInBytes(addr_t addr, |
| int size_in_bytes) { |
| Status error; |
| uint64_t value = |
| m_process->ReadUnsignedIntegerFromMemory(addr, size_in_bytes, 0, error); |
| if (error.Fail()) |
| return -1; |
| else |
| return (int64_t)value; |
| } |
| |
| addr_t DynamicLoader::ReadPointer(addr_t addr) { |
| Status error; |
| addr_t value = m_process->ReadPointerFromMemory(addr, error); |
| if (error.Fail()) |
| return LLDB_INVALID_ADDRESS; |
| else |
| return value; |
| } |
| |
| void DynamicLoader::LoadOperatingSystemPlugin(bool flush) |
| { |
| if (m_process) |
| m_process->LoadOperatingSystemPlugin(flush); |
| } |
| |
