| //===-- DynamicLoaderMacOSXDYLD.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/Breakpoint/StoppointCallbackContext.h" |
| #include "lldb/Core/DataBuffer.h" |
| #include "lldb/Core/DataBufferHeap.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/Log.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/Symbol/ClangASTContext.h" |
| #include "lldb/Symbol/Function.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/ObjCLanguageRuntime.h" |
| #include "lldb/Target/ABI.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadPlanRunToAddress.h" |
| #include "lldb/Target/StackFrame.h" |
| |
| #include "DynamicLoaderMacOSXDYLD.h" |
| #include "DynamicLoaderDarwin.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; |
| |
| |
| //---------------------------------------------------------------------- |
| // Create an instance of this class. This function is filled into |
| // the plugin info class that gets handed out by the plugin factory and |
| // allows the lldb to instantiate an instance of this class. |
| //---------------------------------------------------------------------- |
| DynamicLoader * |
| DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force) |
| { |
| bool create = force; |
| if (!create) |
| { |
| create = true; |
| Module* exe_module = process->GetTarget().GetExecutableModulePointer(); |
| if (exe_module) |
| { |
| ObjectFile *object_file = exe_module->GetObjectFile(); |
| if (object_file) |
| { |
| create = (object_file->GetStrata() == ObjectFile::eStrataUser); |
| } |
| } |
| |
| if (create) |
| { |
| const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); |
| switch (triple_ref.getOS()) |
| { |
| case llvm::Triple::Darwin: |
| case llvm::Triple::MacOSX: |
| case llvm::Triple::IOS: |
| case llvm::Triple::TvOS: |
| case llvm::Triple::WatchOS: |
| create = triple_ref.getVendor() == llvm::Triple::Apple; |
| break; |
| default: |
| create = false; |
| break; |
| } |
| } |
| } |
| |
| if (create) |
| return new DynamicLoaderMacOSXDYLD (process); |
| return NULL; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Constructor |
| //---------------------------------------------------------------------- |
| DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : |
| DynamicLoaderDarwin(process), |
| m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), |
| m_dyld_all_image_infos(), |
| m_dyld_all_image_infos_stop_id (UINT32_MAX), |
| m_break_id(LLDB_INVALID_BREAK_ID), |
| m_mutex(), |
| m_process_image_addr_is_all_images_infos (false) |
| { |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() |
| { |
| if (LLDB_BREAK_ID_IS_VALID(m_break_id)) |
| m_process->GetTarget().RemoveBreakpointByID (m_break_id); |
| } |
| |
| bool |
| DynamicLoaderMacOSXDYLD::ProcessDidExec () |
| { |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| bool did_exec = false; |
| if (m_process) |
| { |
| // If we are stopped after an exec, we will have only one thread... |
| if (m_process->GetThreadList().GetSize() == 1) |
| { |
| // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" |
| // value differs from the Process' image info address. When a process |
| // execs itself it might cause a change if ASLR is enabled. |
| const addr_t shlib_addr = m_process->GetImageInfoAddress (); |
| if (m_process_image_addr_is_all_images_infos == true && shlib_addr != m_dyld_all_image_infos_addr) |
| { |
| // The image info address from the process is the 'dyld_all_image_infos' |
| // address and it has changed. |
| did_exec = true; |
| } |
| else if (m_process_image_addr_is_all_images_infos == false && shlib_addr == m_dyld.address) |
| { |
| // The image info address from the process is the mach_header |
| // address for dyld and it has changed. |
| did_exec = true; |
| } |
| else |
| { |
| // ASLR might be disabled and dyld could have ended up in the same |
| // location. We should try and detect if we are stopped at '_dyld_start' |
| ThreadSP thread_sp(m_process->GetThreadList().GetThreadAtIndex(0)); |
| if (thread_sp) |
| { |
| lldb::StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); |
| if (frame_sp) |
| { |
| const Symbol *symbol = frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; |
| if (symbol) |
| { |
| if (symbol->GetName() == ConstString("_dyld_start")) |
| did_exec = true; |
| } |
| } |
| } |
| } |
| |
| if (did_exec) |
| { |
| m_libpthread_module_wp.reset(); |
| m_pthread_getspecific_addr.Clear(); |
| } |
| } |
| } |
| return did_exec; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Clear out the state of this class. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXDYLD::DoClear () |
| { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| |
| if (LLDB_BREAK_ID_IS_VALID(m_break_id)) |
| m_process->GetTarget().RemoveBreakpointByID (m_break_id); |
| |
| m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; |
| m_dyld_all_image_infos.Clear(); |
| m_break_id = LLDB_INVALID_BREAK_ID; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Check if we have found DYLD yet |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() |
| { |
| return LLDB_BREAK_ID_IS_VALID (m_break_id); |
| } |
| |
| void |
| DynamicLoaderMacOSXDYLD::ClearNotificationBreakpoint () |
| { |
| if (LLDB_BREAK_ID_IS_VALID (m_break_id)) |
| { |
| m_process->GetTarget().RemoveBreakpointByID (m_break_id); |
| } |
| } |
| |
| //---------------------------------------------------------------------- |
| // Try and figure out where dyld is by first asking the Process |
| // if it knows (which currently calls down in the lldb::Process |
| // to get the DYLD info (available on SnowLeopard only). If that fails, |
| // then check in the default addresses. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXDYLD::DoInitialImageFetch() |
| { |
| if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) |
| { |
| // Check the image info addr as it might point to the |
| // mach header for dyld, or it might point to the |
| // dyld_all_image_infos struct |
| const addr_t shlib_addr = m_process->GetImageInfoAddress (); |
| if (shlib_addr != LLDB_INVALID_ADDRESS) |
| { |
| ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); |
| uint8_t buf[4]; |
| DataExtractor data (buf, sizeof(buf), byte_order, 4); |
| Error error; |
| if (m_process->ReadMemory (shlib_addr, buf, 4, error) == 4) |
| { |
| lldb::offset_t offset = 0; |
| uint32_t magic = data.GetU32 (&offset); |
| switch (magic) |
| { |
| case llvm::MachO::MH_MAGIC: |
| case llvm::MachO::MH_MAGIC_64: |
| case llvm::MachO::MH_CIGAM: |
| case llvm::MachO::MH_CIGAM_64: |
| m_process_image_addr_is_all_images_infos = false; |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); |
| return; |
| |
| default: |
| break; |
| } |
| } |
| // Maybe it points to the all image infos? |
| m_dyld_all_image_infos_addr = shlib_addr; |
| m_process_image_addr_is_all_images_infos = true; |
| } |
| } |
| |
| if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) |
| { |
| if (ReadAllImageInfosStructure ()) |
| { |
| if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress); |
| else |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); |
| return; |
| } |
| } |
| |
| // Check some default values |
| Module *executable = m_process->GetTarget().GetExecutableModulePointer(); |
| |
| if (executable) |
| { |
| const ArchSpec &exe_arch = executable->GetArchitecture(); |
| if (exe_arch.GetAddressByteSize() == 8) |
| { |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); |
| } |
| else if (exe_arch.GetMachine() == llvm::Triple::arm || exe_arch.GetMachine() == llvm::Triple::thumb || exe_arch.GetMachine() == llvm::Triple::aarch64) |
| { |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); |
| } |
| else |
| { |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); |
| } |
| } |
| return; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Assume that dyld is in memory at ADDR and try to parse it's load |
| // commands |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) |
| { |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| DataExtractor data; // Load command data |
| if (ReadMachHeader (addr, &m_dyld.header, &data)) |
| { |
| if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) |
| { |
| m_dyld.address = addr; |
| ModuleSP dyld_module_sp; |
| if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) |
| { |
| if (m_dyld.file_spec) |
| { |
| UpdateDYLDImageInfoFromNewImageInfo (m_dyld); |
| |
| } |
| } |
| dyld_module_sp = GetDYLDModule(); |
| |
| Target &target = m_process->GetTarget(); |
| |
| if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) |
| { |
| static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); |
| const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); |
| if (symbol) |
| m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target); |
| } |
| |
| // Update all image infos |
| InitializeFromAllImageInfos (); |
| |
| // If we didn't have an executable before, but now we do, then the |
| // dyld module shared pointer might be unique and we may need to add |
| // it again (since Target::SetExecutableModule() will clear the |
| // images). So append the dyld module back to the list if it is |
| /// unique! |
| if (dyld_module_sp) |
| { |
| target.GetImages().AppendIfNeeded (dyld_module_sp); |
| |
| // At this point we should have read in dyld's module, and so we should set breakpoints in it: |
| ModuleList modules; |
| modules.Append(dyld_module_sp); |
| target.ModulesDidLoad(modules); |
| SetDYLDModule (dyld_module_sp); |
| } |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool |
| DynamicLoaderMacOSXDYLD::NeedToDoInitialImageFetch () |
| { |
| return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Static callback function that gets called when our DYLD notification |
| // breakpoint gets hit. We update all of our image infos and then |
| // let our super class DynamicLoader class decide if we should stop |
| // or not (based on global preference). |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, |
| StoppointCallbackContext *context, |
| lldb::user_id_t break_id, |
| lldb::user_id_t break_loc_id) |
| { |
| // Let the event know that the images have changed |
| // DYLD passes three arguments to the notification breakpoint. |
| // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing |
| // Arg2: uint32_t infoCount - Number of shared libraries added |
| // Arg3: dyld_image_info info[] - Array of structs of the form: |
| // const struct mach_header *imageLoadAddress |
| // const char *imageFilePath |
| // uintptr_t imageFileModDate (a time_t) |
| |
| DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; |
| |
| // First step is to see if we've already initialized the all image infos. If we haven't then this function |
| // will do so and return true. In the course of initializing the all_image_infos it will read the complete |
| // current state, so we don't need to figure out what has changed from the data passed in to us. |
| |
| ExecutionContext exe_ctx (context->exe_ctx_ref); |
| Process *process = exe_ctx.GetProcessPtr(); |
| |
| // This is a sanity check just in case this dyld_instance is an old dyld plugin's breakpoint still lying around. |
| if (process != dyld_instance->m_process) |
| return false; |
| |
| if (dyld_instance->InitializeFromAllImageInfos()) |
| return dyld_instance->GetStopWhenImagesChange(); |
| |
| const lldb::ABISP &abi = process->GetABI(); |
| if (abi) |
| { |
| // Build up the value array to store the three arguments given above, then get the values from the ABI: |
| |
| ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); |
| ValueList argument_values; |
| Value input_value; |
| |
| CompilerType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); |
| CompilerType clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); |
| input_value.SetValueType (Value::eValueTypeScalar); |
| input_value.SetCompilerType (clang_uint32_type); |
| // input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); |
| argument_values.PushValue (input_value); |
| argument_values.PushValue (input_value); |
| input_value.SetCompilerType (clang_void_ptr_type); |
| // input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); |
| argument_values.PushValue (input_value); |
| |
| if (abi->GetArgumentValues (exe_ctx.GetThreadRef(), argument_values)) |
| { |
| uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); |
| if (dyld_mode != static_cast<uint32_t>(-1)) |
| { |
| // Okay the mode was right, now get the number of elements, and the array of new elements... |
| uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); |
| if (image_infos_count != static_cast<uint32_t>(-1)) |
| { |
| // Got the number added, now go through the array of added elements, putting out the mach header |
| // address, and adding the image. |
| // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do |
| // all the logging internally. |
| |
| lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); |
| if (dyld_mode == 0) |
| { |
| // This is add: |
| dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); |
| } |
| else |
| { |
| // This is remove: |
| dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); |
| } |
| |
| } |
| } |
| } |
| } |
| else |
| { |
| process->GetTarget().GetDebugger().GetAsyncErrorStream()->Printf("No ABI plugin located for triple %s -- shared libraries will not be registered!\n", process->GetTarget().GetArchitecture().GetTriple().getTriple().c_str()); |
| } |
| |
| // Return true to stop the target, false to just let the target run |
| return dyld_instance->GetStopWhenImagesChange(); |
| } |
| |
| bool |
| DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () |
| { |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| |
| // the all image infos is already valid for this process stop ID |
| if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) |
| return true; |
| |
| m_dyld_all_image_infos.Clear(); |
| if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) |
| { |
| ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); |
| uint32_t addr_size = 4; |
| if (m_dyld_all_image_infos_addr > UINT32_MAX) |
| addr_size = 8; |
| |
| uint8_t buf[256]; |
| DataExtractor data (buf, sizeof(buf), byte_order, addr_size); |
| lldb::offset_t offset = 0; |
| |
| const size_t count_v2 = sizeof (uint32_t) + // version |
| sizeof (uint32_t) + // infoArrayCount |
| addr_size + // infoArray |
| addr_size + // notification |
| addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad |
| addr_size; // dyldImageLoadAddress |
| const size_t count_v11 = count_v2 + |
| addr_size + // jitInfo |
| addr_size + // dyldVersion |
| addr_size + // errorMessage |
| addr_size + // terminationFlags |
| addr_size + // coreSymbolicationShmPage |
| addr_size + // systemOrderFlag |
| addr_size + // uuidArrayCount |
| addr_size + // uuidArray |
| addr_size + // dyldAllImageInfosAddress |
| addr_size + // initialImageCount |
| addr_size + // errorKind |
| addr_size + // errorClientOfDylibPath |
| addr_size + // errorTargetDylibPath |
| addr_size; // errorSymbol |
| const size_t count_v13 = count_v11 + |
| addr_size + // sharedCacheSlide |
| sizeof (uuid_t); // sharedCacheUUID |
| UNUSED_IF_ASSERT_DISABLED(count_v13); |
| assert (sizeof (buf) >= count_v13); |
| |
| Error error; |
| if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) |
| { |
| m_dyld_all_image_infos.version = data.GetU32(&offset); |
| // If anything in the high byte is set, we probably got the byte |
| // order incorrect (the process might not have it set correctly |
| // yet due to attaching to a program without a specified file). |
| if (m_dyld_all_image_infos.version & 0xff000000) |
| { |
| // We have guessed the wrong byte order. Swap it and try |
| // reading the version again. |
| if (byte_order == eByteOrderLittle) |
| byte_order = eByteOrderBig; |
| else |
| byte_order = eByteOrderLittle; |
| |
| data.SetByteOrder (byte_order); |
| offset = 0; |
| m_dyld_all_image_infos.version = data.GetU32(&offset); |
| } |
| } |
| else |
| { |
| return false; |
| } |
| |
| const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; |
| |
| const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); |
| if (bytes_read == count) |
| { |
| offset = 0; |
| m_dyld_all_image_infos.version = data.GetU32(&offset); |
| m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); |
| m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); |
| m_dyld_all_image_infos.notification = data.GetPointer(&offset); |
| m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); |
| m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); |
| // Adjust for padding. |
| offset += addr_size - 2; |
| m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); |
| if (m_dyld_all_image_infos.version >= 11) |
| { |
| offset += addr_size * 8; |
| uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); |
| |
| // When we started, we were given the actual address of the all_image_infos |
| // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in |
| // m_dyld_all_image_infos_addr and is the most accurate address we have. |
| |
| // We read the dyld_all_image_infos struct from memory; it contains its own address. |
| // If the address in the struct does not match the actual address, |
| // the dyld we're looking at has been loaded at a different location (slid) from |
| // where it intended to load. The addresses in the dyld_all_image_infos struct |
| // are the original, non-slid addresses, and need to be adjusted. Most importantly |
| // the address of dyld and the notification address need to be adjusted. |
| |
| if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) |
| { |
| uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; |
| uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; |
| m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; |
| m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; |
| } |
| } |
| m_dyld_all_image_infos_stop_id = m_process->GetStopID(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| bool |
| DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) |
| { |
| ImageInfo::collection image_infos; |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| if (log) |
| log->Printf ("Adding %d modules.\n", image_infos_count); |
| |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| if (m_process->GetStopID() == m_dyld_image_infos_stop_id) |
| return true; |
| |
| StructuredData::ObjectSP image_infos_json_sp = m_process->GetLoadedDynamicLibrariesInfos (image_infos_addr, image_infos_count); |
| if (image_infos_json_sp.get() |
| && image_infos_json_sp->GetAsDictionary() |
| && image_infos_json_sp->GetAsDictionary()->HasKey("images") |
| && image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray() |
| && image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray()->GetSize() == image_infos_count) |
| { |
| bool return_value = false; |
| if (JSONImageInformationIntoImageInfo (image_infos_json_sp, image_infos)) |
| { |
| AddExecutableModuleIfInImageInfos (image_infos); |
| return_value = AddModulesUsingImageInfos (image_infos); |
| } |
| m_dyld_image_infos_stop_id = m_process->GetStopID(); |
| return return_value; |
| } |
| |
| if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) |
| return false; |
| |
| UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); |
| bool return_value = AddModulesUsingImageInfos (image_infos); |
| m_dyld_image_infos_stop_id = m_process->GetStopID(); |
| return return_value; |
| } |
| |
| bool |
| DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) |
| { |
| ImageInfo::collection image_infos; |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| if (m_process->GetStopID() == m_dyld_image_infos_stop_id) |
| return true; |
| |
| // First read in the image_infos for the removed modules, and their headers & load commands. |
| if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) |
| { |
| if (log) |
| log->PutCString ("Failed reading image infos array."); |
| return false; |
| } |
| |
| if (log) |
| log->Printf ("Removing %d modules.", image_infos_count); |
| |
| ModuleList unloaded_module_list; |
| for (uint32_t idx = 0; idx < image_infos.size(); ++idx) |
| { |
| if (log) |
| { |
| log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address); |
| image_infos[idx].PutToLog (log); |
| } |
| |
| // Remove this image_infos from the m_all_image_infos. We do the comparison by address |
| // rather than by file spec because we can have many modules with the same "file spec" in the |
| // case that they are modules loaded from memory. |
| // |
| // Also copy over the uuid from the old entry to the removed entry so we can |
| // use it to lookup the module in the module list. |
| |
| ImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); |
| for (pos = m_dyld_image_infos.begin(); pos != end; pos++) |
| { |
| if (image_infos[idx].address == (*pos).address) |
| { |
| image_infos[idx].uuid = (*pos).uuid; |
| |
| // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at |
| // one go later on. |
| |
| ModuleSP unload_image_module_sp (FindTargetModuleForImageInfo (image_infos[idx], false, NULL)); |
| if (unload_image_module_sp.get()) |
| { |
| // When we unload, be sure to use the image info from the old list, |
| // since that has sections correctly filled in. |
| UnloadModuleSections (unload_image_module_sp.get(), *pos); |
| unloaded_module_list.AppendIfNeeded (unload_image_module_sp); |
| } |
| else |
| { |
| if (log) |
| { |
| log->Printf ("Could not find module for unloading info entry:"); |
| image_infos[idx].PutToLog(log); |
| } |
| } |
| |
| // Then remove it from the m_dyld_image_infos: |
| |
| m_dyld_image_infos.erase(pos); |
| break; |
| } |
| } |
| |
| if (pos == end) |
| { |
| if (log) |
| { |
| log->Printf ("Could not find image_info entry for unloading image:"); |
| image_infos[idx].PutToLog(log); |
| } |
| } |
| } |
| if (unloaded_module_list.GetSize() > 0) |
| { |
| if (log) |
| { |
| log->PutCString("Unloaded:"); |
| unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); |
| } |
| m_process->GetTarget().GetImages().Remove (unloaded_module_list); |
| } |
| m_dyld_image_infos_stop_id = m_process->GetStopID(); |
| return true; |
| } |
| |
| bool |
| DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, |
| uint32_t image_infos_count, |
| ImageInfo::collection &image_infos) |
| { |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| const ByteOrder endian = GetByteOrderFromMagic (m_dyld.header.magic); |
| const uint32_t addr_size = m_dyld.GetAddressByteSize(); |
| |
| image_infos.resize(image_infos_count); |
| const size_t count = image_infos.size() * 3 * addr_size; |
| DataBufferHeap info_data(count, 0); |
| Error error; |
| const size_t bytes_read = m_process->ReadMemory (image_infos_addr, |
| info_data.GetBytes(), |
| info_data.GetByteSize(), |
| error); |
| if (bytes_read == count) |
| { |
| lldb::offset_t info_data_offset = 0; |
| DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); |
| for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) |
| { |
| image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); |
| lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); |
| image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); |
| |
| char raw_path[PATH_MAX]; |
| m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error); |
| // don't resolve the path |
| if (error.Success()) |
| { |
| const bool resolve_path = false; |
| image_infos[i].file_spec.SetFile(raw_path, resolve_path); |
| } |
| } |
| return true; |
| } |
| else |
| { |
| return false; |
| } |
| } |
| |
| //---------------------------------------------------------------------- |
| // If we have found where the "_dyld_all_image_infos" lives in memory, |
| // read the current info from it, and then update all image load |
| // addresses (or lack thereof). Only do this if this is the first time |
| // we're reading the dyld infos. Return true if we actually read anything, |
| // and false otherwise. |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () |
| { |
| Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| if (m_process->GetStopID() == m_dyld_image_infos_stop_id |
| || m_dyld_image_infos.size() != 0) |
| return false; |
| |
| if (ReadAllImageInfosStructure ()) |
| { |
| // Nothing to load or unload? |
| if (m_dyld_all_image_infos.dylib_info_count == 0) |
| return true; |
| |
| if (m_dyld_all_image_infos.dylib_info_addr == 0) |
| { |
| // DYLD is updating the images now. So we should say we have no images, and then we'll |
| // figure it out when we hit the added breakpoint. |
| return false; |
| } |
| else |
| { |
| if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, |
| m_dyld_all_image_infos.dylib_info_count)) |
| { |
| DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); |
| m_dyld_image_infos.clear(); |
| } |
| } |
| |
| // Now we have one more bit of business. If there is a library left in the images for our target that |
| // doesn't have a load address, then it must be something that we were expecting to load (for instance we |
| // read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed |
| // to an equivalent version. We don't want it to stay in the target's module list or it will confuse |
| // us, so unload it here. |
| Target &target = m_process->GetTarget(); |
| const ModuleList &target_modules = target.GetImages(); |
| ModuleList not_loaded_modules; |
| std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); |
| |
| size_t num_modules = target_modules.GetSize(); |
| for (size_t i = 0; i < num_modules; i++) |
| { |
| ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i); |
| if (!module_sp->IsLoadedInTarget (&target)) |
| { |
| if (log) |
| { |
| StreamString s; |
| module_sp->GetDescription (&s); |
| log->Printf ("Unloading pre-run module: %s.", s.GetData ()); |
| } |
| not_loaded_modules.Append (module_sp); |
| } |
| } |
| |
| if (not_loaded_modules.GetSize() != 0) |
| { |
| target.GetImages().Remove(not_loaded_modules); |
| } |
| |
| return true; |
| } |
| else |
| return false; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Read a mach_header at ADDR into HEADER, and also fill in the load |
| // command data into LOAD_COMMAND_DATA if it is non-NULL. |
| // |
| // Returns true if we succeed, false if we fail for any reason. |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) |
| { |
| DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); |
| Error error; |
| size_t bytes_read = m_process->ReadMemory (addr, |
| header_bytes.GetBytes(), |
| header_bytes.GetByteSize(), |
| error); |
| if (bytes_read == sizeof(llvm::MachO::mach_header)) |
| { |
| lldb::offset_t offset = 0; |
| ::memset (header, 0, sizeof(llvm::MachO::mach_header)); |
| |
| // Get the magic byte unswapped so we can figure out what we are dealing with |
| DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), endian::InlHostByteOrder(), 4); |
| header->magic = data.GetU32(&offset); |
| lldb::addr_t load_cmd_addr = addr; |
| data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); |
| switch (header->magic) |
| { |
| case llvm::MachO::MH_MAGIC: |
| case llvm::MachO::MH_CIGAM: |
| data.SetAddressByteSize(4); |
| load_cmd_addr += sizeof(llvm::MachO::mach_header); |
| break; |
| |
| case llvm::MachO::MH_MAGIC_64: |
| case llvm::MachO::MH_CIGAM_64: |
| data.SetAddressByteSize(8); |
| load_cmd_addr += sizeof(llvm::MachO::mach_header_64); |
| break; |
| |
| default: |
| return false; |
| } |
| |
| // Read the rest of dyld's mach header |
| if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) |
| { |
| if (load_command_data == NULL) |
| return true; // We were able to read the mach_header and weren't asked to read the load command bytes |
| |
| DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); |
| |
| size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, |
| load_cmd_data_sp->GetBytes(), |
| load_cmd_data_sp->GetByteSize(), |
| error); |
| |
| if (load_cmd_bytes_read == header->sizeofcmds) |
| { |
| // Set the load command data and also set the correct endian |
| // swap settings and the correct address size |
| load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); |
| load_command_data->SetByteOrder(data.GetByteOrder()); |
| load_command_data->SetAddressByteSize(data.GetAddressByteSize()); |
| return true; // We successfully read the mach_header and the load command data |
| } |
| |
| return false; // We weren't able to read the load command data |
| } |
| } |
| return false; // We failed the read the mach_header |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // Parse the load commands for an image |
| //---------------------------------------------------------------------- |
| uint32_t |
| DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, ImageInfo& dylib_info, FileSpec *lc_id_dylinker) |
| { |
| lldb::offset_t offset = 0; |
| uint32_t cmd_idx; |
| Segment segment; |
| dylib_info.Clear (true); |
| |
| for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) |
| { |
| // Clear out any load command specific data from DYLIB_INFO since |
| // we are about to read it. |
| |
| if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) |
| { |
| llvm::MachO::load_command load_cmd; |
| lldb::offset_t load_cmd_offset = offset; |
| load_cmd.cmd = data.GetU32 (&offset); |
| load_cmd.cmdsize = data.GetU32 (&offset); |
| switch (load_cmd.cmd) |
| { |
| case llvm::MachO::LC_SEGMENT: |
| { |
| segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); |
| // We are putting 4 uint32_t values 4 uint64_t values so |
| // we have to use multiple 32 bit gets below. |
| segment.vmaddr = data.GetU32 (&offset); |
| segment.vmsize = data.GetU32 (&offset); |
| segment.fileoff = data.GetU32 (&offset); |
| segment.filesize = data.GetU32 (&offset); |
| // Extract maxprot, initprot, nsects and flags all at once |
| data.GetU32(&offset, &segment.maxprot, 4); |
| dylib_info.segments.push_back (segment); |
| } |
| break; |
| |
| case llvm::MachO::LC_SEGMENT_64: |
| { |
| segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); |
| // Extract vmaddr, vmsize, fileoff, and filesize all at once |
| data.GetU64(&offset, &segment.vmaddr, 4); |
| // Extract maxprot, initprot, nsects and flags all at once |
| data.GetU32(&offset, &segment.maxprot, 4); |
| dylib_info.segments.push_back (segment); |
| } |
| break; |
| |
| case llvm::MachO::LC_ID_DYLINKER: |
| if (lc_id_dylinker) |
| { |
| const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset); |
| const char *path = data.PeekCStr (name_offset); |
| lc_id_dylinker->SetFile (path, true); |
| } |
| break; |
| |
| case llvm::MachO::LC_UUID: |
| dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); |
| break; |
| |
| default: |
| break; |
| } |
| // Set offset to be the beginning of the next load command. |
| offset = load_cmd_offset + load_cmd.cmdsize; |
| } |
| } |
| |
| // 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 = dylib_info.segments.size(); |
| for (size_t i = 0; i < num_sections; ++i) |
| { |
| // 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 ((dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) || (dylib_info.segments[i].name == ConstString("__TEXT"))) |
| { |
| dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; |
| // We have found the slide amount, so we can exit |
| // this for loop. |
| break; |
| } |
| } |
| return cmd_idx; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Read the mach_header and load commands for each image that the |
| // _dyld_all_image_infos structure points to and cache the results. |
| //---------------------------------------------------------------------- |
| |
| void |
| DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(ImageInfo::collection &image_infos, |
| uint32_t infos_count, |
| bool update_executable) |
| { |
| uint32_t exe_idx = UINT32_MAX; |
| // Read any UUID values that we can get |
| for (uint32_t i = 0; i < infos_count; i++) |
| { |
| if (!image_infos[i].UUIDValid()) |
| { |
| DataExtractor data; // Load command data |
| if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) |
| continue; |
| |
| ParseLoadCommands (data, image_infos[i], NULL); |
| |
| if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) |
| exe_idx = i; |
| |
| } |
| } |
| |
| Target &target = m_process->GetTarget(); |
| |
| if (exe_idx < image_infos.size()) |
| { |
| const bool can_create = true; |
| ModuleSP exe_module_sp (FindTargetModuleForImageInfo (image_infos[exe_idx], can_create, NULL)); |
| |
| if (exe_module_sp) |
| { |
| UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]); |
| |
| if (exe_module_sp.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. Also when setting the |
| // executable module, it will clear the targets module list, and if we |
| // have an in memory dyld module, it will get removed from the list |
| // so we will need to add it back after setting the executable module, |
| // so we first try and see if we already have a weak pointer to the |
| // dyld module, make it into a shared pointer, then add the executable, |
| // then re-add it back to make sure it is always in the list. |
| ModuleSP dyld_module_sp(GetDYLDModule ()); |
| |
| const bool get_dependent_images = false; |
| m_process->GetTarget().SetExecutableModule (exe_module_sp, |
| get_dependent_images); |
| |
| if (dyld_module_sp) |
| { |
| if(target.GetImages().AppendIfNeeded (dyld_module_sp)) |
| { |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| |
| // Also add it to the section list. |
| UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // Dump the _dyld_all_image_infos members and all current image infos |
| // that we have parsed to the file handle provided. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const |
| { |
| if (log == NULL) |
| return; |
| |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }", |
| m_dyld_all_image_infos.version, |
| m_dyld_all_image_infos.dylib_info_count, |
| (uint64_t)m_dyld_all_image_infos.dylib_info_addr, |
| (uint64_t)m_dyld_all_image_infos.notification); |
| size_t i; |
| const size_t count = m_dyld_image_infos.size(); |
| if (count > 0) |
| { |
| log->PutCString("Loaded:"); |
| for (i = 0; i<count; i++) |
| m_dyld_image_infos[i].PutToLog(log); |
| } |
| } |
| |
| bool |
| DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () |
| { |
| DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); |
| if (m_break_id == LLDB_INVALID_BREAK_ID) |
| { |
| if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) |
| { |
| Address so_addr; |
| // Set the notification breakpoint and install a breakpoint |
| // callback function that will get called each time the |
| // breakpoint gets hit. We will use this to track when shared |
| // libraries get loaded/unloaded. |
| bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); |
| if (!resolved) |
| { |
| ModuleSP dyld_module_sp = m_dyld_module_wp.lock(); |
| if (dyld_module_sp) |
| { |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| |
| UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); |
| resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); |
| } |
| } |
| |
| if (resolved) |
| { |
| Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true, false).get(); |
| dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); |
| dyld_break->SetBreakpointKind ("shared-library-event"); |
| m_break_id = dyld_break->GetID(); |
| } |
| } |
| } |
| return m_break_id != LLDB_INVALID_BREAK_ID; |
| } |
| |
| Error |
| DynamicLoaderMacOSXDYLD::CanLoadImage () |
| { |
| Error error; |
| // In order for us to tell if we can load a shared library we verify that |
| // the dylib_info_addr isn't zero (which means no shared libraries have |
| // been set yet, or dyld is currently mucking with the shared library list). |
| if (ReadAllImageInfosStructure ()) |
| { |
| // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? |
| // TODO: check the malloc lock? |
| // TODO: check the objective C lock? |
| if (m_dyld_all_image_infos.dylib_info_addr != 0) |
| return error; // Success |
| } |
| |
| error.SetErrorString("unsafe to load or unload shared libraries"); |
| return error; |
| } |
| |
| void |
| DynamicLoaderMacOSXDYLD::Initialize() |
| { |
| PluginManager::RegisterPlugin (GetPluginNameStatic(), |
| GetPluginDescriptionStatic(), |
| CreateInstance); |
| } |
| |
| void |
| DynamicLoaderMacOSXDYLD::Terminate() |
| { |
| PluginManager::UnregisterPlugin (CreateInstance); |
| } |
| |
| |
| lldb_private::ConstString |
| DynamicLoaderMacOSXDYLD::GetPluginNameStatic() |
| { |
| static ConstString g_name("macosx-dyld"); |
| return g_name; |
| } |
| |
| const char * |
| DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() |
| { |
| return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; |
| } |
| |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| lldb_private::ConstString |
| DynamicLoaderMacOSXDYLD::GetPluginName() |
| { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t |
| DynamicLoaderMacOSXDYLD::GetPluginVersion() |
| { |
| return 1; |
| } |
| |
| uint32_t |
| DynamicLoaderMacOSXDYLD::AddrByteSize() |
| { |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); |
| |
| switch (m_dyld.header.magic) |
| { |
| case llvm::MachO::MH_MAGIC: |
| case llvm::MachO::MH_CIGAM: |
| return 4; |
| |
| case llvm::MachO::MH_MAGIC_64: |
| case llvm::MachO::MH_CIGAM_64: |
| return 8; |
| |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| lldb::ByteOrder |
| DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(uint32_t magic) |
| { |
| switch (magic) |
| { |
| case llvm::MachO::MH_MAGIC: |
| case llvm::MachO::MH_MAGIC_64: |
| return endian::InlHostByteOrder(); |
| |
| case llvm::MachO::MH_CIGAM: |
| case llvm::MachO::MH_CIGAM_64: |
| if (endian::InlHostByteOrder() == lldb::eByteOrderBig) |
| return lldb::eByteOrderLittle; |
| else |
| return lldb::eByteOrderBig; |
| |
| default: |
| break; |
| } |
| return lldb::eByteOrderInvalid; |
| } |
