| //===-- DynamicLoaderMacOSXDYLD.cpp ---------------------------------------===// | |
| // | |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |
| // See https://llvm.org/LICENSE.txt for license information. | |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |
| // | |
| //===----------------------------------------------------------------------===// | |
| #include "DynamicLoaderMacOSXDYLD.h" | |
| #include "DynamicLoaderDarwin.h" | |
| #include "DynamicLoaderMacOS.h" | |
| #include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h" | |
| #include "Plugins/TypeSystem/Clang/TypeSystemClang.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/Symbol/Function.h" | |
| #include "lldb/Symbol/ObjectFile.h" | |
| #include "lldb/Target/ABI.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/LLDBLog.h" | |
| #include "lldb/Utility/Log.h" | |
| #include "lldb/Utility/State.h" | |
| //#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN | |
| #ifdef ENABLE_DEBUG_PRINTF | |
| #include <cstdio> | |
| #define DEBUG_PRINTF(fmt, ...) printf(fmt, ##__VA_ARGS__) | |
| #else | |
| #define DEBUG_PRINTF(fmt, ...) | |
| #endif | |
| #ifndef __APPLE__ | |
| #include "lldb/Utility/AppleUuidCompatibility.h" | |
| #else | |
| #include <uuid/uuid.h> | |
| #endif | |
| using namespace lldb; | |
| using namespace lldb_private; | |
| LLDB_PLUGIN_DEFINE(DynamicLoaderMacOSXDYLD) | |
| // 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: | |
| case llvm::Triple::BridgeOS: | |
| case llvm::Triple::DriverKit: | |
| case llvm::Triple::XROS: | |
| create = triple_ref.getVendor() == llvm::Triple::Apple; | |
| break; | |
| default: | |
| create = false; | |
| break; | |
| } | |
| } | |
| } | |
| if (UseDYLDSPI(process)) { | |
| create = false; | |
| } | |
| if (create) | |
| return new DynamicLoaderMacOSXDYLD(process); | |
| return nullptr; | |
| } | |
| // 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 && | |
| 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 && | |
| 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() == "_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 || | |
| exe_arch.GetMachine() == llvm::Triple::aarch64_32) { | |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); | |
| } else { | |
| ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); | |
| } | |
| } | |
| } | |
| // 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"); | |
| static ConstString g_new_dyld_all_image_infos("dyld4::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) { | |
| if (!UpdateDYLDImageInfoFromNewImageInfo(m_dyld)) | |
| return false; | |
| } | |
| } | |
| dyld_module_sp = GetDYLDModule(); | |
| if (!dyld_module_sp) | |
| return false; | |
| 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) { | |
| symbol = dyld_module_sp->FindFirstSymbolWithNameAndType( | |
| g_new_dyld_all_image_infos, eSymbolTypeData); | |
| } | |
| if (symbol) | |
| m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target); | |
| } | |
| if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) { | |
| SectionSP dyld_aii_section_sp = | |
| dyld_module_sp->GetSectionList()->FindSectionByName( | |
| "__all_image_info"); | |
| if (dyld_aii_section_sp) { | |
| Address dyld_aii_addr(dyld_aii_section_sp, 0); | |
| m_dyld_all_image_infos_addr = dyld_aii_addr.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::RebuildModuleListWithExecutable() 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: | |
| TypeSystemClangSP scratch_ts_sp = | |
| ScratchTypeSystemClang::GetForTarget(process->GetTarget()); | |
| if (!scratch_ts_sp) | |
| return false; | |
| ValueList argument_values; | |
| Value input_value; | |
| CompilerType clang_void_ptr_type = | |
| scratch_ts_sp->GetBasicType(eBasicTypeVoid).GetPointerType(); | |
| CompilerType clang_uint32_type = | |
| scratch_ts_sp->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, | |
| 32); | |
| input_value.SetValueType(Value::ValueType::Scalar); | |
| 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 { | |
| Target &target = process->GetTarget(); | |
| Debugger::ReportWarning( | |
| "no ABI plugin located for triple " + | |
| target.GetArchitecture().GetTriple().getTriple() + | |
| ": shared libraries will not be registered", | |
| target.GetDebugger().GetID()); | |
| } | |
| // 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.GetAddress(&offset); | |
| m_dyld_all_image_infos.notification = data.GetAddress(&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.GetAddress(&offset); | |
| if (m_dyld_all_image_infos.version >= 11) { | |
| offset += addr_size * 8; | |
| uint64_t dyld_all_image_infos_addr = data.GetAddress(&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 = GetLog(LLDBLog::DynamicLoader); | |
| LLDB_LOGF(log, "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)) { | |
| auto images = PreloadModulesFromImageInfos(image_infos); | |
| UpdateSpecialBinariesFromPreloadedModules(images); | |
| return_value = AddModulesUsingPreloadedModules(images); | |
| } | |
| 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 = GetLog(LLDBLog::DynamicLoader); | |
| 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; | |
| } | |
| LLDB_LOGF(log, "Removing %d modules.", image_infos_count); | |
| ModuleList unloaded_module_list; | |
| for (uint32_t idx = 0; idx < image_infos.size(); ++idx) { | |
| if (log) { | |
| LLDB_LOGF(log, "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. | |
| bool found = false; | |
| for (ImageInfo::collection::iterator pos = m_dyld_image_infos.begin(); | |
| pos != m_dyld_image_infos.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, nullptr)); | |
| 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) { | |
| LLDB_LOGF(log, "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); | |
| found = true; | |
| break; | |
| } | |
| } | |
| if (!found) { | |
| if (log) { | |
| LLDB_LOGF(log, "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.GetAddress(&info_data_offset); | |
| lldb::addr_t path_addr = info_data_ref.GetAddress(&info_data_offset); | |
| info_data_ref.GetAddress(&info_data_offset); // mod_date, unused */ | |
| char raw_path[PATH_MAX]; | |
| m_process->ReadCStringFromMemory(path_addr, raw_path, sizeof(raw_path), | |
| error); | |
| // don't resolve the path | |
| if (error.Success()) { | |
| image_infos[i].file_spec.SetFile(raw_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 = GetLog(LLDBLog::DynamicLoader); | |
| 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(); | |
| ModuleList not_loaded_modules; | |
| for (ModuleSP module_sp : target.GetImages().Modules()) { | |
| if (!module_sp->IsLoadedInTarget(&target)) { | |
| if (log) { | |
| StreamString s; | |
| module_sp->GetDescription(s.AsRawOstream()); | |
| LLDB_LOGF(log, "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 == nullptr) | |
| return true; // We were able to read the mach_header and weren't asked | |
| // to read the load command bytes | |
| WritableDataBufferSP 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: { | |
| data.CopyData(offset, 16, segment.name); | |
| segment.name[16] = '\0'; | |
| offset += 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: { | |
| data.CopyData(offset, 16, segment.name); | |
| segment.name[16] = '\0'; | |
| offset += 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); | |
| if (std::optional<llvm::StringRef> path = data.PeekCStr(name_offset)) | |
| lc_id_dylinker->SetFile(*path, FileSpec::Style::native); | |
| FileSystem::Instance().Resolve(*lc_id_dylinker); | |
| } | |
| break; | |
| case llvm::MachO::LC_UUID: | |
| dylib_info.uuid = UUID(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) || | |
| (llvm::StringRef(dylib_info.segments[i].name) == "__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], nullptr); | |
| 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, nullptr)); | |
| 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()); | |
| m_process->GetTarget().RebuildModuleListWithExecutable( | |
| exe_module_sp, eLoadDependentsNo); | |
| 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 == nullptr) | |
| return; | |
| std::lock_guard<std::recursive_mutex> guard(m_mutex); | |
| std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); | |
| LLDB_LOGF(log, | |
| "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 = Status::FromErrorString("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, FileSpec &shared_cache_filepath, | |
| std::optional<uint64_t> &size) { | |
| base_address = LLDB_INVALID_ADDRESS; | |
| uuid.Clear(); | |
| using_shared_cache = eLazyBoolCalculate; | |
| private_shared_cache = eLazyBoolCalculate; | |
| size.reset(); | |
| 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(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; | |
| } | |
| bool DynamicLoaderMacOSXDYLD::IsFullyInitialized() { | |
| if (ReadAllImageInfosStructure()) | |
| return m_dyld_all_image_infos.libSystemInitialized; | |
| return false; | |
| } | |
| void DynamicLoaderMacOSXDYLD::Initialize() { | |
| PluginManager::RegisterPlugin(GetPluginNameStatic(), | |
| GetPluginDescriptionStatic(), CreateInstance); | |
| DynamicLoaderMacOS::Initialize(); | |
| } | |
| void DynamicLoaderMacOSXDYLD::Terminate() { | |
| DynamicLoaderMacOS::Terminate(); | |
| PluginManager::UnregisterPlugin(CreateInstance); | |
| } | |
| llvm::StringRef DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() { | |
| return "Dynamic loader plug-in that watches for shared library loads/unloads " | |
| "in MacOSX user processes."; | |
| } | |
| 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; | |
| } |