| //===-- 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/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/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/ThreadPlanRunToAddress.h" |
| #include "lldb/Utility/DataBuffer.h" |
| #include "lldb/Utility/DataBufferHeap.h" |
| #include "lldb/Utility/Log.h" |
| |
| #include "DynamicLoaderDarwin.h" |
| #include "DynamicLoaderMacOSXDYLD.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 (UseDYLDSPI(process) == true) { |
| create = false; |
| } |
| |
| 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); |
| Status 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 |
| static ConstString g_dyld_all_image_infos("dyld_all_image_infos"); |
| 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()) { |
| 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 = |
| m_process->GetTarget().GetArchitecture().GetAddressByteSize(); |
| |
| 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); |
| |
| Status 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)) { |
| UpdateSpecialBinariesFromNewImageInfos(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); |
| Status 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, |
| FileSpec::Style::native); |
| } |
| } |
| 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); |
| Status 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, FileSpec::Style::native); |
| } |
| break; |
| |
| case llvm::MachO::LC_UUID: |
| dylib_info.uuid = UUID::fromOptionalData(data.GetData(&offset, 16), 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 = GetDYLDModule(); |
| 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; |
| } |
| |
| Status DynamicLoaderMacOSXDYLD::CanLoadImage() { |
| Status 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; |
| } |
| |
| bool DynamicLoaderMacOSXDYLD::GetSharedCacheInformation( |
| lldb::addr_t &base_address, UUID &uuid, LazyBool &using_shared_cache, |
| LazyBool &private_shared_cache) { |
| base_address = LLDB_INVALID_ADDRESS; |
| uuid.Clear(); |
| using_shared_cache = eLazyBoolCalculate; |
| private_shared_cache = eLazyBoolCalculate; |
| |
| if (m_process) { |
| addr_t all_image_infos = m_process->GetImageInfoAddress(); |
| |
| // The address returned by GetImageInfoAddress may be the address of dyld |
| // (don't want) or it may be the address of the dyld_all_image_infos |
| // structure (want). The first four bytes will be either the version field |
| // (all_image_infos) or a Mach-O file magic constant. Version 13 and higher |
| // of dyld_all_image_infos is required to get the sharedCacheUUID field. |
| |
| Status err; |
| uint32_t version_or_magic = |
| m_process->ReadUnsignedIntegerFromMemory(all_image_infos, 4, -1, err); |
| if (version_or_magic != static_cast<uint32_t>(-1) && |
| version_or_magic != llvm::MachO::MH_MAGIC && |
| version_or_magic != llvm::MachO::MH_CIGAM && |
| version_or_magic != llvm::MachO::MH_MAGIC_64 && |
| version_or_magic != llvm::MachO::MH_CIGAM_64 && |
| version_or_magic >= 13) { |
| addr_t sharedCacheUUID_address = LLDB_INVALID_ADDRESS; |
| int wordsize = m_process->GetAddressByteSize(); |
| if (wordsize == 8) { |
| sharedCacheUUID_address = |
| all_image_infos + 160; // sharedCacheUUID <mach-o/dyld_images.h> |
| } |
| if (wordsize == 4) { |
| sharedCacheUUID_address = |
| all_image_infos + 84; // sharedCacheUUID <mach-o/dyld_images.h> |
| } |
| if (sharedCacheUUID_address != LLDB_INVALID_ADDRESS) { |
| uuid_t shared_cache_uuid; |
| if (m_process->ReadMemory(sharedCacheUUID_address, shared_cache_uuid, |
| sizeof(uuid_t), err) == sizeof(uuid_t)) { |
| uuid = UUID::fromOptionalData(shared_cache_uuid, 16); |
| if (uuid.IsValid()) { |
| using_shared_cache = eLazyBoolYes; |
| } |
| } |
| |
| if (version_or_magic >= 15) { |
| // The sharedCacheBaseAddress field is the next one in the |
| // dyld_all_image_infos struct. |
| addr_t sharedCacheBaseAddr_address = sharedCacheUUID_address + 16; |
| Status error; |
| base_address = m_process->ReadUnsignedIntegerFromMemory( |
| sharedCacheBaseAddr_address, wordsize, LLDB_INVALID_ADDRESS, |
| error); |
| if (error.Fail()) |
| base_address = LLDB_INVALID_ADDRESS; |
| } |
| |
| return true; |
| } |
| |
| // |
| // add |
| // NB: sharedCacheBaseAddress is the next field in dyld_all_image_infos |
| // after |
| // sharedCacheUUID -- that is, 16 bytes after it, if we wanted to fetch |
| // it. |
| } |
| } |
| return false; |
| } |
| |
| 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; |
| } |
