| //===-- DynamicLoaderDarwin.cpp -----------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DynamicLoaderDarwin.h" |
| |
| #include "lldb/Breakpoint/StoppointCallbackContext.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/ModuleSpec.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/Section.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Expression/DiagnosticManager.h" |
| #include "lldb/Host/FileSystem.h" |
| #include "lldb/Symbol/ClangASTContext.h" |
| #include "lldb/Symbol/Function.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/ABI.h" |
| #include "lldb/Target/ObjCLanguageRuntime.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/StackFrame.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadPlanCallFunction.h" |
| #include "lldb/Target/ThreadPlanRunToAddress.h" |
| #include "lldb/Utility/DataBuffer.h" |
| #include "lldb/Utility/DataBufferHeap.h" |
| #include "lldb/Utility/Log.h" |
| |
| //#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN |
| #ifdef ENABLE_DEBUG_PRINTF |
| #include <stdio.h> |
| #define DEBUG_PRINTF(fmt, ...) printf(fmt, ##__VA_ARGS__) |
| #else |
| #define DEBUG_PRINTF(fmt, ...) |
| #endif |
| |
| #ifndef __APPLE__ |
| #include "Utility/UuidCompatibility.h" |
| #else |
| #include <uuid/uuid.h> |
| #endif |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // Constructor |
| //---------------------------------------------------------------------- |
| DynamicLoaderDarwin::DynamicLoaderDarwin(Process *process) |
| : DynamicLoader(process), m_dyld_module_wp(), m_libpthread_module_wp(), |
| m_pthread_getspecific_addr(), m_tid_to_tls_map(), m_dyld_image_infos(), |
| m_dyld_image_infos_stop_id(UINT32_MAX), m_dyld(), m_mutex() {} |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| DynamicLoaderDarwin::~DynamicLoaderDarwin() {} |
| |
| //------------------------------------------------------------------ |
| /// Called after attaching a process. |
| /// |
| /// Allow DynamicLoader plug-ins to execute some code after |
| /// attaching to a process. |
| //------------------------------------------------------------------ |
| void DynamicLoaderDarwin::DidAttach() { |
| PrivateInitialize(m_process); |
| DoInitialImageFetch(); |
| SetNotificationBreakpoint(); |
| } |
| |
| //------------------------------------------------------------------ |
| /// Called after attaching a process. |
| /// |
| /// Allow DynamicLoader plug-ins to execute some code after |
| /// attaching to a process. |
| //------------------------------------------------------------------ |
| void DynamicLoaderDarwin::DidLaunch() { |
| PrivateInitialize(m_process); |
| DoInitialImageFetch(); |
| SetNotificationBreakpoint(); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Clear out the state of this class. |
| //---------------------------------------------------------------------- |
| void DynamicLoaderDarwin::Clear(bool clear_process) { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| if (clear_process) |
| m_process = NULL; |
| m_dyld_image_infos.clear(); |
| m_dyld_image_infos_stop_id = UINT32_MAX; |
| m_dyld.Clear(false); |
| } |
| |
| ModuleSP DynamicLoaderDarwin::FindTargetModuleForImageInfo( |
| ImageInfo &image_info, bool can_create, bool *did_create_ptr) { |
| if (did_create_ptr) |
| *did_create_ptr = false; |
| |
| Target &target = m_process->GetTarget(); |
| const ModuleList &target_images = target.GetImages(); |
| ModuleSpec module_spec(image_info.file_spec); |
| module_spec.GetUUID() = image_info.uuid; |
| ModuleSP module_sp(target_images.FindFirstModule(module_spec)); |
| |
| if (module_sp && !module_spec.GetUUID().IsValid() && |
| !module_sp->GetUUID().IsValid()) { |
| // No UUID, we must rely upon the cached module modification time and the |
| // modification time of the file on disk |
| if (module_sp->GetModificationTime() != |
| FileSystem::GetModificationTime(module_sp->GetFileSpec())) |
| module_sp.reset(); |
| } |
| |
| if (!module_sp) { |
| if (can_create) { |
| module_sp = target.GetSharedModule(module_spec); |
| if (!module_sp || module_sp->GetObjectFile() == NULL) |
| module_sp = m_process->ReadModuleFromMemory(image_info.file_spec, |
| image_info.address); |
| |
| if (did_create_ptr) |
| *did_create_ptr = (bool)module_sp; |
| } |
| } |
| return module_sp; |
| } |
| |
| void DynamicLoaderDarwin::UnloadImages( |
| const std::vector<lldb::addr_t> &solib_addresses) { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| if (m_process->GetStopID() == m_dyld_image_infos_stop_id) |
| return; |
| |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); |
| Target &target = m_process->GetTarget(); |
| if (log) |
| log->Printf("Removing %" PRId64 " modules.", |
| (uint64_t)solib_addresses.size()); |
| |
| ModuleList unloaded_module_list; |
| |
| for (addr_t solib_addr : solib_addresses) { |
| Address header; |
| if (header.SetLoadAddress(solib_addr, &target)) { |
| if (header.GetOffset() == 0) { |
| ModuleSP module_to_remove(header.GetModule()); |
| if (module_to_remove.get()) { |
| if (log) |
| log->Printf("Removing module at address 0x%" PRIx64, solib_addr); |
| // remove the sections from the Target |
| UnloadSections(module_to_remove); |
| // add this to the list of modules to remove |
| unloaded_module_list.AppendIfNeeded(module_to_remove); |
| // remove the entry from the m_dyld_image_infos |
| ImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); |
| for (pos = m_dyld_image_infos.begin(); pos != end; pos++) { |
| if (solib_addr == (*pos).address) { |
| m_dyld_image_infos.erase(pos); |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| if (unloaded_module_list.GetSize() > 0) { |
| if (log) { |
| log->PutCString("Unloaded:"); |
| unloaded_module_list.LogUUIDAndPaths( |
| log, "DynamicLoaderDarwin::UnloadModules"); |
| } |
| m_process->GetTarget().GetImages().Remove(unloaded_module_list); |
| m_dyld_image_infos_stop_id = m_process->GetStopID(); |
| } |
| } |
| |
| void DynamicLoaderDarwin::UnloadAllImages() { |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); |
| ModuleList unloaded_modules_list; |
| |
| Target &target = m_process->GetTarget(); |
| const ModuleList &target_modules = target.GetImages(); |
| std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); |
| |
| size_t num_modules = target_modules.GetSize(); |
| ModuleSP dyld_sp(GetDYLDModule()); |
| |
| for (size_t i = 0; i < num_modules; i++) { |
| ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked(i); |
| |
| // Don't remove dyld - else we'll lose our breakpoint notifying us about |
| // libraries being re-loaded... |
| if (module_sp.get() != nullptr && module_sp.get() != dyld_sp.get()) { |
| UnloadSections(module_sp); |
| unloaded_modules_list.Append(module_sp); |
| } |
| } |
| |
| if (unloaded_modules_list.GetSize() != 0) { |
| if (log) { |
| log->PutCString("Unloaded:"); |
| unloaded_modules_list.LogUUIDAndPaths( |
| log, "DynamicLoaderDarwin::UnloadAllImages"); |
| } |
| target.GetImages().Remove(unloaded_modules_list); |
| m_dyld_image_infos.clear(); |
| m_dyld_image_infos_stop_id = m_process->GetStopID(); |
| } |
| } |
| |
| //---------------------------------------------------------------------- |
| // Update the load addresses for all segments in MODULE using the updated INFO |
| // that is passed in. |
| //---------------------------------------------------------------------- |
| bool DynamicLoaderDarwin::UpdateImageLoadAddress(Module *module, |
| ImageInfo &info) { |
| bool changed = false; |
| if (module) { |
| ObjectFile *image_object_file = module->GetObjectFile(); |
| if (image_object_file) { |
| SectionList *section_list = image_object_file->GetSectionList(); |
| if (section_list) { |
| std::vector<uint32_t> inaccessible_segment_indexes; |
| // We now know the slide amount, so go through all sections and update |
| // the load addresses with the correct values. |
| const size_t num_segments = info.segments.size(); |
| for (size_t i = 0; i < num_segments; ++i) { |
| // Only load a segment if it has protections. Things like __PAGEZERO |
| // don't have any protections, and they shouldn't be slid |
| SectionSP section_sp( |
| section_list->FindSectionByName(info.segments[i].name)); |
| |
| if (info.segments[i].maxprot == 0) { |
| inaccessible_segment_indexes.push_back(i); |
| } else { |
| const addr_t new_section_load_addr = |
| info.segments[i].vmaddr + info.slide; |
| static ConstString g_section_name_LINKEDIT("__LINKEDIT"); |
| |
| if (section_sp) { |
| // __LINKEDIT sections from files in the shared cache can overlap |
| // so check to see what the segment name is and pass "false" so |
| // we don't warn of overlapping "Section" objects, and "true" for |
| // all other sections. |
| const bool warn_multiple = |
| section_sp->GetName() != g_section_name_LINKEDIT; |
| |
| changed = m_process->GetTarget().SetSectionLoadAddress( |
| section_sp, new_section_load_addr, warn_multiple); |
| } else { |
| Host::SystemLog( |
| Host::eSystemLogWarning, |
| "warning: unable to find and load segment named '%s' at " |
| "0x%" PRIx64 " in '%s' in macosx dynamic loader plug-in.\n", |
| info.segments[i].name.AsCString("<invalid>"), |
| (uint64_t)new_section_load_addr, |
| image_object_file->GetFileSpec().GetPath().c_str()); |
| } |
| } |
| } |
| |
| // If the loaded the file (it changed) and we have segments that are |
| // not readable or writeable, add them to the invalid memory region |
| // cache for the process. This will typically only be the __PAGEZERO |
| // segment in the main executable. We might be able to apply this more |
| // generally to more sections that have no protections in the future, |
| // but for now we are going to just do __PAGEZERO. |
| if (changed && !inaccessible_segment_indexes.empty()) { |
| for (uint32_t i = 0; i < inaccessible_segment_indexes.size(); ++i) { |
| const uint32_t seg_idx = inaccessible_segment_indexes[i]; |
| SectionSP section_sp( |
| section_list->FindSectionByName(info.segments[seg_idx].name)); |
| |
| if (section_sp) { |
| static ConstString g_pagezero_section_name("__PAGEZERO"); |
| if (g_pagezero_section_name == section_sp->GetName()) { |
| // __PAGEZERO never slides... |
| const lldb::addr_t vmaddr = info.segments[seg_idx].vmaddr; |
| const lldb::addr_t vmsize = info.segments[seg_idx].vmsize; |
| Process::LoadRange pagezero_range(vmaddr, vmsize); |
| m_process->AddInvalidMemoryRegion(pagezero_range); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| // We might have an in memory image that was loaded as soon as it was created |
| if (info.load_stop_id == m_process->GetStopID()) |
| changed = true; |
| else if (changed) { |
| // Update the stop ID when this library was updated |
| info.load_stop_id = m_process->GetStopID(); |
| } |
| return changed; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Unload the segments in MODULE using the INFO that is passed in. |
| //---------------------------------------------------------------------- |
| bool DynamicLoaderDarwin::UnloadModuleSections(Module *module, |
| ImageInfo &info) { |
| bool changed = false; |
| if (module) { |
| ObjectFile *image_object_file = module->GetObjectFile(); |
| if (image_object_file) { |
| SectionList *section_list = image_object_file->GetSectionList(); |
| if (section_list) { |
| const size_t num_segments = info.segments.size(); |
| for (size_t i = 0; i < num_segments; ++i) { |
| SectionSP section_sp( |
| section_list->FindSectionByName(info.segments[i].name)); |
| if (section_sp) { |
| const addr_t old_section_load_addr = |
| info.segments[i].vmaddr + info.slide; |
| if (m_process->GetTarget().SetSectionUnloaded( |
| section_sp, old_section_load_addr)) |
| changed = true; |
| } else { |
| Host::SystemLog(Host::eSystemLogWarning, |
| "warning: unable to find and unload segment named " |
| "'%s' in '%s' in macosx dynamic loader plug-in.\n", |
| info.segments[i].name.AsCString("<invalid>"), |
| image_object_file->GetFileSpec().GetPath().c_str()); |
| } |
| } |
| } |
| } |
| } |
| return changed; |
| } |
| |
| // Given a JSON dictionary (from debugserver, most likely) of binary images |
| // loaded in the inferior process, add the images to the ImageInfo collection. |
| |
| bool DynamicLoaderDarwin::JSONImageInformationIntoImageInfo( |
| StructuredData::ObjectSP image_details, |
| ImageInfo::collection &image_infos) { |
| StructuredData::ObjectSP images_sp = |
| image_details->GetAsDictionary()->GetValueForKey("images"); |
| if (images_sp.get() == nullptr) |
| return false; |
| |
| image_infos.resize(images_sp->GetAsArray()->GetSize()); |
| |
| for (size_t i = 0; i < image_infos.size(); i++) { |
| StructuredData::ObjectSP image_sp = |
| images_sp->GetAsArray()->GetItemAtIndex(i); |
| if (image_sp.get() == nullptr || image_sp->GetAsDictionary() == nullptr) |
| return false; |
| StructuredData::Dictionary *image = image_sp->GetAsDictionary(); |
| if (image->HasKey("load_address") == false || |
| image->HasKey("pathname") == false || |
| image->HasKey("mod_date") == false || |
| image->HasKey("mach_header") == false || |
| image->GetValueForKey("mach_header")->GetAsDictionary() == nullptr || |
| image->HasKey("segments") == false || |
| image->GetValueForKey("segments")->GetAsArray() == nullptr || |
| image->HasKey("uuid") == false) { |
| return false; |
| } |
| image_infos[i].address = |
| image->GetValueForKey("load_address")->GetAsInteger()->GetValue(); |
| image_infos[i].mod_date = |
| image->GetValueForKey("mod_date")->GetAsInteger()->GetValue(); |
| image_infos[i].file_spec.SetFile( |
| image->GetValueForKey("pathname")->GetAsString()->GetValue(), false, |
| FileSpec::Style::native); |
| |
| StructuredData::Dictionary *mh = |
| image->GetValueForKey("mach_header")->GetAsDictionary(); |
| image_infos[i].header.magic = |
| mh->GetValueForKey("magic")->GetAsInteger()->GetValue(); |
| image_infos[i].header.cputype = |
| mh->GetValueForKey("cputype")->GetAsInteger()->GetValue(); |
| image_infos[i].header.cpusubtype = |
| mh->GetValueForKey("cpusubtype")->GetAsInteger()->GetValue(); |
| image_infos[i].header.filetype = |
| mh->GetValueForKey("filetype")->GetAsInteger()->GetValue(); |
| |
| if (image->HasKey("min_version_os_name")) { |
| std::string os_name = image->GetValueForKey("min_version_os_name") |
| ->GetAsString() |
| ->GetValue(); |
| if (os_name == "macosx") |
| image_infos[i].os_type = llvm::Triple::MacOSX; |
| else if (os_name == "ios" || os_name == "iphoneos") |
| image_infos[i].os_type = llvm::Triple::IOS; |
| else if (os_name == "tvos") |
| image_infos[i].os_type = llvm::Triple::TvOS; |
| else if (os_name == "watchos") |
| image_infos[i].os_type = llvm::Triple::WatchOS; |
| } |
| if (image->HasKey("min_version_os_sdk")) { |
| image_infos[i].min_version_os_sdk = |
| image->GetValueForKey("min_version_os_sdk") |
| ->GetAsString() |
| ->GetValue(); |
| } |
| |
| // Fields that aren't used by DynamicLoaderDarwin so debugserver doesn't |
| // currently send them in the reply. |
| |
| if (mh->HasKey("flags")) |
| image_infos[i].header.flags = |
| mh->GetValueForKey("flags")->GetAsInteger()->GetValue(); |
| else |
| image_infos[i].header.flags = 0; |
| |
| if (mh->HasKey("ncmds")) |
| image_infos[i].header.ncmds = |
| mh->GetValueForKey("ncmds")->GetAsInteger()->GetValue(); |
| else |
| image_infos[i].header.ncmds = 0; |
| |
| if (mh->HasKey("sizeofcmds")) |
| image_infos[i].header.sizeofcmds = |
| mh->GetValueForKey("sizeofcmds")->GetAsInteger()->GetValue(); |
| else |
| image_infos[i].header.sizeofcmds = 0; |
| |
| StructuredData::Array *segments = |
| image->GetValueForKey("segments")->GetAsArray(); |
| uint32_t segcount = segments->GetSize(); |
| for (size_t j = 0; j < segcount; j++) { |
| Segment segment; |
| StructuredData::Dictionary *seg = |
| segments->GetItemAtIndex(j)->GetAsDictionary(); |
| segment.name = |
| ConstString(seg->GetValueForKey("name")->GetAsString()->GetValue()); |
| segment.vmaddr = |
| seg->GetValueForKey("vmaddr")->GetAsInteger()->GetValue(); |
| segment.vmsize = |
| seg->GetValueForKey("vmsize")->GetAsInteger()->GetValue(); |
| segment.fileoff = |
| seg->GetValueForKey("fileoff")->GetAsInteger()->GetValue(); |
| segment.filesize = |
| seg->GetValueForKey("filesize")->GetAsInteger()->GetValue(); |
| segment.maxprot = |
| seg->GetValueForKey("maxprot")->GetAsInteger()->GetValue(); |
| |
| // Fields that aren't used by DynamicLoaderDarwin so debugserver doesn't |
| // currently send them in the reply. |
| |
| if (seg->HasKey("initprot")) |
| segment.initprot = |
| seg->GetValueForKey("initprot")->GetAsInteger()->GetValue(); |
| else |
| segment.initprot = 0; |
| |
| if (seg->HasKey("flags")) |
| segment.flags = |
| seg->GetValueForKey("flags")->GetAsInteger()->GetValue(); |
| else |
| segment.flags = 0; |
| |
| if (seg->HasKey("nsects")) |
| segment.nsects = |
| seg->GetValueForKey("nsects")->GetAsInteger()->GetValue(); |
| else |
| segment.nsects = 0; |
| |
| image_infos[i].segments.push_back(segment); |
| } |
| |
| image_infos[i].uuid.SetFromStringRef( |
| image->GetValueForKey("uuid")->GetAsString()->GetValue()); |
| |
| // All sections listed in the dyld image info structure will all either be |
| // fixed up already, or they will all be off by a single slide amount that |
| // is determined by finding the first segment that is at file offset zero |
| // which also has bytes (a file size that is greater than zero) in the |
| // object file. |
| |
| // Determine the slide amount (if any) |
| const size_t num_sections = image_infos[i].segments.size(); |
| for (size_t k = 0; k < num_sections; ++k) { |
| // Iterate through the object file sections to find the first section |
| // that starts of file offset zero and that has bytes in the file... |
| if ((image_infos[i].segments[k].fileoff == 0 && |
| image_infos[i].segments[k].filesize > 0) || |
| (image_infos[i].segments[k].name == ConstString("__TEXT"))) { |
| image_infos[i].slide = |
| image_infos[i].address - image_infos[i].segments[k].vmaddr; |
| // We have found the slide amount, so we can exit this for loop. |
| break; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| void DynamicLoaderDarwin::UpdateSpecialBinariesFromNewImageInfos( |
| ImageInfo::collection &image_infos) { |
| uint32_t exe_idx = UINT32_MAX; |
| uint32_t dyld_idx = UINT32_MAX; |
| Target &target = m_process->GetTarget(); |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); |
| ConstString g_dyld_sim_filename("dyld_sim"); |
| |
| ArchSpec target_arch = target.GetArchitecture(); |
| const size_t image_infos_size = image_infos.size(); |
| for (size_t i = 0; i < image_infos_size; i++) { |
| if (image_infos[i].header.filetype == llvm::MachO::MH_DYLINKER) { |
| // In a "simulator" process (an x86 process that is ios/tvos/watchos) we |
| // will have two dyld modules -- a "dyld" that we want to keep track of, |
| // and a "dyld_sim" which we don't need to keep track of here. If the |
| // target is an x86 system and the OS of the dyld binary is |
| // ios/tvos/watchos, then we are looking at dyld_sym. |
| |
| // debugserver has only recently (late 2016) started sending up the os |
| // type for each binary it sees -- so if we don't have an os type, use a |
| // filename check as our next best guess. |
| if (image_infos[i].os_type == llvm::Triple::OSType::UnknownOS) { |
| if (image_infos[i].file_spec.GetFilename() != g_dyld_sim_filename) { |
| dyld_idx = i; |
| } |
| } else if (target_arch.GetTriple().getArch() == llvm::Triple::x86 || |
| target_arch.GetTriple().getArch() == llvm::Triple::x86_64) { |
| if (image_infos[i].os_type != llvm::Triple::OSType::IOS && |
| image_infos[i].os_type != llvm::Triple::TvOS && |
| image_infos[i].os_type != llvm::Triple::WatchOS) { |
| dyld_idx = i; |
| } |
| } |
| else { |
| // catch-all for any other environment -- trust that dyld is actually |
| // dyld |
| dyld_idx = i; |
| } |
| } else if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) { |
| exe_idx = i; |
| } |
| } |
| |
| if (exe_idx != UINT32_MAX) { |
| const bool can_create = true; |
| ModuleSP exe_module_sp( |
| FindTargetModuleForImageInfo(image_infos[exe_idx], can_create, NULL)); |
| if (exe_module_sp) { |
| if (log) |
| log->Printf("Found executable module: %s", |
| exe_module_sp->GetFileSpec().GetPath().c_str()); |
| target.GetImages().AppendIfNeeded(exe_module_sp); |
| UpdateImageLoadAddress(exe_module_sp.get(), image_infos[exe_idx]); |
| if (exe_module_sp.get() != target.GetExecutableModulePointer()) { |
| const bool get_dependent_images = false; |
| target.SetExecutableModule(exe_module_sp, get_dependent_images); |
| } |
| } |
| } |
| |
| if (dyld_idx != UINT32_MAX) { |
| const bool can_create = true; |
| ModuleSP dyld_sp = |
| FindTargetModuleForImageInfo(image_infos[dyld_idx], can_create, NULL); |
| if (dyld_sp.get()) { |
| if (log) |
| log->Printf("Found dyld module: %s", |
| dyld_sp->GetFileSpec().GetPath().c_str()); |
| target.GetImages().AppendIfNeeded(dyld_sp); |
| UpdateImageLoadAddress(dyld_sp.get(), image_infos[dyld_idx]); |
| SetDYLDModule(dyld_sp); |
| } |
| } |
| } |
| |
| void DynamicLoaderDarwin::UpdateDYLDImageInfoFromNewImageInfo( |
| ImageInfo &image_info) { |
| if (image_info.header.filetype == llvm::MachO::MH_DYLINKER) { |
| const bool can_create = true; |
| ModuleSP dyld_sp = |
| FindTargetModuleForImageInfo(image_info, can_create, NULL); |
| if (dyld_sp.get()) { |
| Target &target = m_process->GetTarget(); |
| target.GetImages().AppendIfNeeded(dyld_sp); |
| UpdateImageLoadAddress(dyld_sp.get(), image_info); |
| SetDYLDModule(dyld_sp); |
| } |
| } |
| } |
| |
| void DynamicLoaderDarwin::SetDYLDModule(lldb::ModuleSP &dyld_module_sp) { |
| m_dyld_module_wp = dyld_module_sp; |
| } |
| |
| ModuleSP DynamicLoaderDarwin::GetDYLDModule() { |
| ModuleSP dyld_sp(m_dyld_module_wp.lock()); |
| return dyld_sp; |
| } |
| |
| bool DynamicLoaderDarwin::AddModulesUsingImageInfos( |
| ImageInfo::collection &image_infos) { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| // Now add these images to the main list. |
| ModuleList loaded_module_list; |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); |
| Target &target = m_process->GetTarget(); |
| ModuleList &target_images = target.GetImages(); |
| |
| for (uint32_t idx = 0; idx < image_infos.size(); ++idx) { |
| if (log) { |
| log->Printf("Adding new image at address=0x%16.16" PRIx64 ".", |
| image_infos[idx].address); |
| image_infos[idx].PutToLog(log); |
| } |
| |
| m_dyld_image_infos.push_back(image_infos[idx]); |
| |
| ModuleSP image_module_sp( |
| FindTargetModuleForImageInfo(image_infos[idx], true, NULL)); |
| |
| if (image_module_sp) { |
| ObjectFile *objfile = image_module_sp->GetObjectFile(); |
| if (objfile) { |
| SectionList *sections = objfile->GetSectionList(); |
| if (sections) { |
| ConstString commpage_dbstr("__commpage"); |
| Section *commpage_section = |
| sections->FindSectionByName(commpage_dbstr).get(); |
| if (commpage_section) { |
| ModuleSpec module_spec(objfile->GetFileSpec(), |
| image_infos[idx].GetArchitecture()); |
| module_spec.GetObjectName() = commpage_dbstr; |
| ModuleSP commpage_image_module_sp( |
| target_images.FindFirstModule(module_spec)); |
| if (!commpage_image_module_sp) { |
| module_spec.SetObjectOffset(objfile->GetFileOffset() + |
| commpage_section->GetFileOffset()); |
| module_spec.SetObjectSize(objfile->GetByteSize()); |
| commpage_image_module_sp = target.GetSharedModule(module_spec); |
| if (!commpage_image_module_sp || |
| commpage_image_module_sp->GetObjectFile() == NULL) { |
| commpage_image_module_sp = m_process->ReadModuleFromMemory( |
| image_infos[idx].file_spec, image_infos[idx].address); |
| // Always load a memory image right away in the target in case |
| // we end up trying to read the symbol table from memory... The |
| // __LINKEDIT will need to be mapped so we can figure out where |
| // the symbol table bits are... |
| bool changed = false; |
| UpdateImageLoadAddress(commpage_image_module_sp.get(), |
| image_infos[idx]); |
| target.GetImages().Append(commpage_image_module_sp); |
| if (changed) { |
| image_infos[idx].load_stop_id = m_process->GetStopID(); |
| loaded_module_list.AppendIfNeeded(commpage_image_module_sp); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| // UpdateImageLoadAddress will return true if any segments change load |
| // address. We need to check this so we don't mention that all loaded |
| // shared libraries are newly loaded each time we hit out dyld breakpoint |
| // since dyld will list all shared libraries each time. |
| if (UpdateImageLoadAddress(image_module_sp.get(), image_infos[idx])) { |
| target_images.AppendIfNeeded(image_module_sp); |
| loaded_module_list.AppendIfNeeded(image_module_sp); |
| } |
| } |
| } |
| |
| if (loaded_module_list.GetSize() > 0) { |
| if (log) |
| loaded_module_list.LogUUIDAndPaths(log, |
| "DynamicLoaderDarwin::ModulesDidLoad"); |
| m_process->GetTarget().ModulesDidLoad(loaded_module_list); |
| } |
| return true; |
| } |
| |
| //---------------------------------------------------------------------- |
| // On Mac OS X libobjc (the Objective-C runtime) has several critical dispatch |
| // functions written in hand-written assembly, and also have hand-written |
| // unwind information in the eh_frame section. Normally we prefer analyzing |
| // the assembly instructions of a currently executing frame to unwind from that |
| // frame -- but on hand-written functions this profiling can fail. We should |
| // use the eh_frame instructions for these functions all the time. |
| // |
| // As an aside, it would be better if the eh_frame entries had a flag (or were |
| // extensible so they could have an Apple-specific flag) which indicates that |
| // the instructions are asynchronous -- accurate at every instruction, instead |
| // of our normal default assumption that they are not. |
| //---------------------------------------------------------------------- |
| |
| bool DynamicLoaderDarwin::AlwaysRelyOnEHUnwindInfo(SymbolContext &sym_ctx) { |
| ModuleSP module_sp; |
| if (sym_ctx.symbol) { |
| module_sp = sym_ctx.symbol->GetAddressRef().GetModule(); |
| } |
| if (module_sp.get() == NULL && sym_ctx.function) { |
| module_sp = |
| sym_ctx.function->GetAddressRange().GetBaseAddress().GetModule(); |
| } |
| if (module_sp.get() == NULL) |
| return false; |
| |
| ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); |
| if (objc_runtime != NULL && objc_runtime->IsModuleObjCLibrary(module_sp)) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Dump a Segment to the file handle provided. |
| //---------------------------------------------------------------------- |
| void DynamicLoaderDarwin::Segment::PutToLog(Log *log, |
| lldb::addr_t slide) const { |
| if (log) { |
| if (slide == 0) |
| log->Printf("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")", |
| name.AsCString(""), vmaddr + slide, vmaddr + slide + vmsize); |
| else |
| log->Printf("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 |
| ") slide = 0x%" PRIx64, |
| name.AsCString(""), vmaddr + slide, vmaddr + slide + vmsize, |
| slide); |
| } |
| } |
| |
| const DynamicLoaderDarwin::Segment * |
| DynamicLoaderDarwin::ImageInfo::FindSegment(const ConstString &name) const { |
| const size_t num_segments = segments.size(); |
| for (size_t i = 0; i < num_segments; ++i) { |
| if (segments[i].name == name) |
| return &segments[i]; |
| } |
| return NULL; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Dump an image info structure to the file handle provided. |
| //---------------------------------------------------------------------- |
| void DynamicLoaderDarwin::ImageInfo::PutToLog(Log *log) const { |
| if (log == NULL) |
| return; |
| const uint8_t *u = (const uint8_t *)uuid.GetBytes(); |
| |
| if (address == LLDB_INVALID_ADDRESS) { |
| if (u) { |
| log->Printf("\t modtime=0x%8.8" PRIx64 |
| " uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-" |
| "%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X path='%s' (UNLOADED)", |
| mod_date, u[0], u[1], u[2], u[3], u[4], u[5], u[6], u[7], |
| u[8], u[9], u[10], u[11], u[12], u[13], u[14], u[15], |
| file_spec.GetPath().c_str()); |
| } else |
| log->Printf("\t modtime=0x%8.8" PRIx64 |
| " path='%s' (UNLOADED)", |
| mod_date, file_spec.GetPath().c_str()); |
| } else { |
| if (u) { |
| log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 |
| " uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-" |
| "%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X path='%s'", |
| address, mod_date, u[0], u[1], u[2], u[3], u[4], u[5], u[6], |
| u[7], u[8], u[9], u[10], u[11], u[12], u[13], u[14], u[15], |
| file_spec.GetPath().c_str()); |
| } else { |
| log->Printf("\taddress=0x%16.16" PRIx64 " modtime=0x%8.8" PRIx64 |
| " path='%s'", |
| address, mod_date, file_spec.GetPath().c_str()); |
| } |
| for (uint32_t i = 0; i < segments.size(); ++i) |
| segments[i].PutToLog(log, slide); |
| } |
| } |
| |
| void DynamicLoaderDarwin::PrivateInitialize(Process *process) { |
| DEBUG_PRINTF("DynamicLoaderDarwin::%s() process state = %s\n", __FUNCTION__, |
| StateAsCString(m_process->GetState())); |
| Clear(true); |
| m_process = process; |
| m_process->GetTarget().ClearAllLoadedSections(); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Member function that gets called when the process state changes. |
| //---------------------------------------------------------------------- |
| void DynamicLoaderDarwin::PrivateProcessStateChanged(Process *process, |
| StateType state) { |
| DEBUG_PRINTF("DynamicLoaderDarwin::%s(%s)\n", __FUNCTION__, |
| StateAsCString(state)); |
| switch (state) { |
| case eStateConnected: |
| case eStateAttaching: |
| case eStateLaunching: |
| case eStateInvalid: |
| case eStateUnloaded: |
| case eStateExited: |
| case eStateDetached: |
| Clear(false); |
| break; |
| |
| case eStateStopped: |
| // Keep trying find dyld and set our notification breakpoint each time we |
| // stop until we succeed |
| if (!DidSetNotificationBreakpoint() && m_process->IsAlive()) { |
| if (NeedToDoInitialImageFetch()) |
| DoInitialImageFetch(); |
| |
| SetNotificationBreakpoint(); |
| } |
| break; |
| |
| case eStateRunning: |
| case eStateStepping: |
| case eStateCrashed: |
| case eStateSuspended: |
| break; |
| } |
| } |
| |
| ThreadPlanSP |
| DynamicLoaderDarwin::GetStepThroughTrampolinePlan(Thread &thread, |
| bool stop_others) { |
| ThreadPlanSP thread_plan_sp; |
| StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); |
| const SymbolContext ¤t_context = |
| current_frame->GetSymbolContext(eSymbolContextSymbol); |
| Symbol *current_symbol = current_context.symbol; |
| Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP)); |
| TargetSP target_sp(thread.CalculateTarget()); |
| |
| if (current_symbol != NULL) { |
| std::vector<Address> addresses; |
| |
| if (current_symbol->IsTrampoline()) { |
| const ConstString &trampoline_name = current_symbol->GetMangled().GetName( |
| current_symbol->GetLanguage(), Mangled::ePreferMangled); |
| |
| if (trampoline_name) { |
| const ModuleList &images = target_sp->GetImages(); |
| |
| SymbolContextList code_symbols; |
| images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, |
| code_symbols); |
| size_t num_code_symbols = code_symbols.GetSize(); |
| |
| if (num_code_symbols > 0) { |
| for (uint32_t i = 0; i < num_code_symbols; i++) { |
| SymbolContext context; |
| AddressRange addr_range; |
| if (code_symbols.GetContextAtIndex(i, context)) { |
| context.GetAddressRange(eSymbolContextEverything, 0, false, |
| addr_range); |
| addresses.push_back(addr_range.GetBaseAddress()); |
| if (log) { |
| addr_t load_addr = |
| addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); |
| |
| log->Printf("Found a trampoline target symbol at 0x%" PRIx64 |
| ".", |
| load_addr); |
| } |
| } |
| } |
| } |
| |
| SymbolContextList reexported_symbols; |
| images.FindSymbolsWithNameAndType( |
| trampoline_name, eSymbolTypeReExported, reexported_symbols); |
| size_t num_reexported_symbols = reexported_symbols.GetSize(); |
| if (num_reexported_symbols > 0) { |
| for (uint32_t i = 0; i < num_reexported_symbols; i++) { |
| SymbolContext context; |
| if (reexported_symbols.GetContextAtIndex(i, context)) { |
| if (context.symbol) { |
| Symbol *actual_symbol = |
| context.symbol->ResolveReExportedSymbol(*target_sp.get()); |
| if (actual_symbol) { |
| const Address actual_symbol_addr = |
| actual_symbol->GetAddress(); |
| if (actual_symbol_addr.IsValid()) { |
| addresses.push_back(actual_symbol_addr); |
| if (log) { |
| lldb::addr_t load_addr = |
| actual_symbol_addr.GetLoadAddress(target_sp.get()); |
| log->Printf( |
| "Found a re-exported symbol: %s at 0x%" PRIx64 ".", |
| actual_symbol->GetName().GetCString(), load_addr); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| SymbolContextList indirect_symbols; |
| images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeResolver, |
| indirect_symbols); |
| size_t num_indirect_symbols = indirect_symbols.GetSize(); |
| if (num_indirect_symbols > 0) { |
| for (uint32_t i = 0; i < num_indirect_symbols; i++) { |
| SymbolContext context; |
| AddressRange addr_range; |
| if (indirect_symbols.GetContextAtIndex(i, context)) { |
| context.GetAddressRange(eSymbolContextEverything, 0, false, |
| addr_range); |
| addresses.push_back(addr_range.GetBaseAddress()); |
| if (log) { |
| addr_t load_addr = |
| addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); |
| |
| log->Printf("Found an indirect target symbol at 0x%" PRIx64 ".", |
| load_addr); |
| } |
| } |
| } |
| } |
| } |
| } else if (current_symbol->GetType() == eSymbolTypeReExported) { |
| // I am not sure we could ever end up stopped AT a re-exported symbol. |
| // But just in case: |
| |
| const Symbol *actual_symbol = |
| current_symbol->ResolveReExportedSymbol(*(target_sp.get())); |
| if (actual_symbol) { |
| Address target_addr(actual_symbol->GetAddress()); |
| if (target_addr.IsValid()) { |
| if (log) |
| log->Printf( |
| "Found a re-exported symbol: %s pointing to: %s at 0x%" PRIx64 |
| ".", |
| current_symbol->GetName().GetCString(), |
| actual_symbol->GetName().GetCString(), |
| target_addr.GetLoadAddress(target_sp.get())); |
| addresses.push_back(target_addr.GetLoadAddress(target_sp.get())); |
| } |
| } |
| } |
| |
| if (addresses.size() > 0) { |
| // First check whether any of the addresses point to Indirect symbols, |
| // and if they do, resolve them: |
| std::vector<lldb::addr_t> load_addrs; |
| for (Address address : addresses) { |
| Symbol *symbol = address.CalculateSymbolContextSymbol(); |
| if (symbol && symbol->IsIndirect()) { |
| Status error; |
| Address symbol_address = symbol->GetAddress(); |
| addr_t resolved_addr = thread.GetProcess()->ResolveIndirectFunction( |
| &symbol_address, error); |
| if (error.Success()) { |
| load_addrs.push_back(resolved_addr); |
| if (log) |
| log->Printf("ResolveIndirectFunction found resolved target for " |
| "%s at 0x%" PRIx64 ".", |
| symbol->GetName().GetCString(), resolved_addr); |
| } |
| } else { |
| load_addrs.push_back(address.GetLoadAddress(target_sp.get())); |
| } |
| } |
| thread_plan_sp.reset( |
| new ThreadPlanRunToAddress(thread, load_addrs, stop_others)); |
| } |
| } else { |
| if (log) |
| log->Printf("Could not find symbol for step through."); |
| } |
| |
| return thread_plan_sp; |
| } |
| |
| size_t DynamicLoaderDarwin::FindEquivalentSymbols( |
| lldb_private::Symbol *original_symbol, lldb_private::ModuleList &images, |
| lldb_private::SymbolContextList &equivalent_symbols) { |
| const ConstString &trampoline_name = original_symbol->GetMangled().GetName( |
| original_symbol->GetLanguage(), Mangled::ePreferMangled); |
| if (!trampoline_name) |
| return 0; |
| |
| size_t initial_size = equivalent_symbols.GetSize(); |
| |
| static const char *resolver_name_regex = "(_gc|_non_gc|\\$[A-Za-z0-9\\$]+)$"; |
| std::string equivalent_regex_buf("^"); |
| equivalent_regex_buf.append(trampoline_name.GetCString()); |
| equivalent_regex_buf.append(resolver_name_regex); |
| |
| RegularExpression equivalent_name_regex(equivalent_regex_buf); |
| const bool append = true; |
| images.FindSymbolsMatchingRegExAndType(equivalent_name_regex, eSymbolTypeCode, |
| equivalent_symbols, append); |
| |
| return equivalent_symbols.GetSize() - initial_size; |
| } |
| |
| lldb::ModuleSP DynamicLoaderDarwin::GetPThreadLibraryModule() { |
| ModuleSP module_sp = m_libpthread_module_wp.lock(); |
| if (!module_sp) { |
| SymbolContextList sc_list; |
| ModuleSpec module_spec; |
| module_spec.GetFileSpec().GetFilename().SetCString( |
| "libsystem_pthread.dylib"); |
| ModuleList module_list; |
| if (m_process->GetTarget().GetImages().FindModules(module_spec, |
| module_list)) { |
| if (module_list.GetSize() == 1) { |
| module_sp = module_list.GetModuleAtIndex(0); |
| if (module_sp) |
| m_libpthread_module_wp = module_sp; |
| } |
| } |
| } |
| return module_sp; |
| } |
| |
| Address DynamicLoaderDarwin::GetPthreadSetSpecificAddress() { |
| if (!m_pthread_getspecific_addr.IsValid()) { |
| ModuleSP module_sp = GetPThreadLibraryModule(); |
| if (module_sp) { |
| lldb_private::SymbolContextList sc_list; |
| module_sp->FindSymbolsWithNameAndType(ConstString("pthread_getspecific"), |
| eSymbolTypeCode, sc_list); |
| SymbolContext sc; |
| if (sc_list.GetContextAtIndex(0, sc)) { |
| if (sc.symbol) |
| m_pthread_getspecific_addr = sc.symbol->GetAddress(); |
| } |
| } |
| } |
| return m_pthread_getspecific_addr; |
| } |
| |
| lldb::addr_t |
| DynamicLoaderDarwin::GetThreadLocalData(const lldb::ModuleSP module_sp, |
| const lldb::ThreadSP thread_sp, |
| lldb::addr_t tls_file_addr) { |
| if (!thread_sp || !module_sp) |
| return LLDB_INVALID_ADDRESS; |
| |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| |
| const uint32_t addr_size = m_process->GetAddressByteSize(); |
| uint8_t buf[sizeof(lldb::addr_t) * 3]; |
| |
| lldb_private::Address tls_addr; |
| if (module_sp->ResolveFileAddress(tls_file_addr, tls_addr)) { |
| Status error; |
| const size_t tsl_data_size = addr_size * 3; |
| Target &target = m_process->GetTarget(); |
| if (target.ReadMemory(tls_addr, false, buf, tsl_data_size, error) == |
| tsl_data_size) { |
| const ByteOrder byte_order = m_process->GetByteOrder(); |
| DataExtractor data(buf, sizeof(buf), byte_order, addr_size); |
| lldb::offset_t offset = addr_size; // Skip the first pointer |
| const lldb::addr_t pthread_key = data.GetAddress(&offset); |
| const lldb::addr_t tls_offset = data.GetAddress(&offset); |
| if (pthread_key != 0) { |
| // First check to see if we have already figured out the location of |
| // TLS data for the pthread_key on a specific thread yet. If we have we |
| // can re-use it since its location will not change unless the process |
| // execs. |
| const tid_t tid = thread_sp->GetID(); |
| auto tid_pos = m_tid_to_tls_map.find(tid); |
| if (tid_pos != m_tid_to_tls_map.end()) { |
| auto tls_pos = tid_pos->second.find(pthread_key); |
| if (tls_pos != tid_pos->second.end()) { |
| return tls_pos->second + tls_offset; |
| } |
| } |
| StackFrameSP frame_sp = thread_sp->GetStackFrameAtIndex(0); |
| if (frame_sp) { |
| ClangASTContext *clang_ast_context = |
| target.GetScratchClangASTContext(); |
| |
| if (!clang_ast_context) |
| return LLDB_INVALID_ADDRESS; |
| |
| CompilerType clang_void_ptr_type = |
| clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); |
| Address pthread_getspecific_addr = GetPthreadSetSpecificAddress(); |
| if (pthread_getspecific_addr.IsValid()) { |
| EvaluateExpressionOptions options; |
| |
| lldb::ThreadPlanSP thread_plan_sp(new ThreadPlanCallFunction( |
| *thread_sp, pthread_getspecific_addr, clang_void_ptr_type, |
| llvm::ArrayRef<lldb::addr_t>(pthread_key), options)); |
| |
| DiagnosticManager execution_errors; |
| ExecutionContext exe_ctx(thread_sp); |
| lldb::ExpressionResults results = m_process->RunThreadPlan( |
| exe_ctx, thread_plan_sp, options, execution_errors); |
| |
| if (results == lldb::eExpressionCompleted) { |
| lldb::ValueObjectSP result_valobj_sp = |
| thread_plan_sp->GetReturnValueObject(); |
| if (result_valobj_sp) { |
| const lldb::addr_t pthread_key_data = |
| result_valobj_sp->GetValueAsUnsigned(0); |
| if (pthread_key_data) { |
| m_tid_to_tls_map[tid].insert( |
| std::make_pair(pthread_key, pthread_key_data)); |
| return pthread_key_data + tls_offset; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| return LLDB_INVALID_ADDRESS; |
| } |
| |
| bool DynamicLoaderDarwin::UseDYLDSPI(Process *process) { |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); |
| bool use_new_spi_interface = false; |
| |
| llvm::VersionTuple version = process->GetHostOSVersion(); |
| if (!version.empty()) { |
| const llvm::Triple::OSType os_type = |
| process->GetTarget().GetArchitecture().GetTriple().getOS(); |
| |
| // macOS 10.12 and newer |
| if (os_type == llvm::Triple::MacOSX && |
| version >= llvm::VersionTuple(10, 12)) |
| use_new_spi_interface = true; |
| |
| // iOS 10 and newer |
| if (os_type == llvm::Triple::IOS && version >= llvm::VersionTuple(10)) |
| use_new_spi_interface = true; |
| |
| // tvOS 10 and newer |
| if (os_type == llvm::Triple::TvOS && version >= llvm::VersionTuple(10)) |
| use_new_spi_interface = true; |
| |
| // watchOS 3 and newer |
| if (os_type == llvm::Triple::WatchOS && version >= llvm::VersionTuple(3)) |
| use_new_spi_interface = true; |
| } |
| |
| if (log) { |
| if (use_new_spi_interface) |
| log->Printf( |
| "DynamicLoaderDarwin::UseDYLDSPI: Use new DynamicLoader plugin"); |
| else |
| log->Printf( |
| "DynamicLoaderDarwin::UseDYLDSPI: Use old DynamicLoader plugin"); |
| } |
| return use_new_spi_interface; |
| } |
