| //===-- DynamicLoaderMacOSXKernel.cpp -----------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Breakpoint/StoppointCallbackContext.h" |
| #include "lldb/Core/DataBuffer.h" |
| #include "lldb/Core/DataBufferHeap.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/ObjCLanguageRuntime.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadPlanRunToAddress.h" |
| #include "lldb/Target/StackFrame.h" |
| |
| #include "DynamicLoaderMacOSXKernel.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 |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| /// FIXME - The ObjC Runtime trampoline handler doesn't really belong here. |
| /// I am putting it here so I can invoke it in the Trampoline code here, but |
| /// it should be moved to the ObjC Runtime support when it is set up. |
| |
| |
| //---------------------------------------------------------------------- |
| // 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 * |
| DynamicLoaderMacOSXKernel::CreateInstance (Process* process, bool force) |
| { |
| bool create = force; |
| if (!create) |
| { |
| const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); |
| if (triple_ref.getOS() == llvm::Triple::Darwin && triple_ref.getVendor() == llvm::Triple::Apple) |
| create = true; |
| } |
| |
| if (create) |
| return new DynamicLoaderMacOSXKernel (process); |
| return NULL; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Constructor |
| //---------------------------------------------------------------------- |
| DynamicLoaderMacOSXKernel::DynamicLoaderMacOSXKernel (Process* process) : |
| DynamicLoader(process), |
| m_kernel(), |
| m_kext_summary_header_addr (LLDB_INVALID_ADDRESS), |
| m_kext_summary_header (), |
| m_kext_summary_header_stop_id (0), |
| m_break_id (LLDB_INVALID_BREAK_ID), |
| m_kext_summaries(), |
| m_kext_summaries_stop_id (UINT32_MAX), |
| m_mutex(Mutex::eMutexTypeRecursive), |
| m_notification_callbacks () |
| { |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| DynamicLoaderMacOSXKernel::~DynamicLoaderMacOSXKernel() |
| { |
| Clear(true); |
| } |
| |
| //------------------------------------------------------------------ |
| /// Called after attaching a process. |
| /// |
| /// Allow DynamicLoader plug-ins to execute some code after |
| /// attaching to a process. |
| //------------------------------------------------------------------ |
| void |
| DynamicLoaderMacOSXKernel::DidAttach () |
| { |
| PrivateInitialize(m_process); |
| LoadKernelModule(); |
| SetNotificationBreakpoint (); |
| } |
| |
| //------------------------------------------------------------------ |
| /// Called after attaching a process. |
| /// |
| /// Allow DynamicLoader plug-ins to execute some code after |
| /// attaching to a process. |
| //------------------------------------------------------------------ |
| void |
| DynamicLoaderMacOSXKernel::DidLaunch () |
| { |
| PrivateInitialize(m_process); |
| LoadKernelModule(); |
| SetNotificationBreakpoint (); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // Clear out the state of this class. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXKernel::Clear (bool clear_process) |
| { |
| Mutex::Locker locker(m_mutex); |
| |
| if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id)) |
| m_process->ClearBreakpointSiteByID(m_break_id); |
| |
| if (clear_process) |
| m_process = NULL; |
| m_kernel.Clear(false); |
| m_kext_summary_header_addr = LLDB_INVALID_ADDRESS; |
| m_kext_summaries.clear(); |
| m_kext_summaries_stop_id = 0; |
| m_break_id = LLDB_INVALID_BREAK_ID; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Check if we have found DYLD yet |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXKernel::DidSetNotificationBreakpoint() const |
| { |
| return LLDB_BREAK_ID_IS_VALID (m_break_id); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Load the kernel module and initialize the "m_kernel" member. Return |
| // true _only_ if the kernel is loaded the first time through (subsequent |
| // calls to this function should return false after the kernel has been |
| // already loaded). |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXKernel::LoadKernelModule() |
| { |
| if (m_kext_summary_header_addr == LLDB_INVALID_ADDRESS) |
| { |
| m_kernel.Clear(false); |
| m_kernel.module_sp = m_process->GetTarget().GetExecutableModule(); |
| if (m_kernel.module_sp) |
| { |
| static ConstString mach_header_name ("_mh_execute_header"); |
| const Symbol *symbol = m_kernel.module_sp->FindFirstSymbolWithNameAndType (mach_header_name, eSymbolTypeAbsolute); |
| if (symbol) |
| { |
| m_kernel.address = symbol->GetValue().GetFileAddress(); |
| DataExtractor data; // Load command data |
| if (ReadMachHeader (m_kernel.address, &m_kernel.header, &data)) |
| { |
| if (m_kernel.header.filetype == llvm::MachO::HeaderFileTypeDynamicLinkEditor) |
| { |
| if (ParseLoadCommands (data, m_kernel)) |
| UpdateImageLoadAddress (m_kernel); |
| |
| // Update all image infos |
| ReadAllKextSummaries (false); |
| return true; |
| } |
| } |
| else |
| { |
| m_kernel.Clear(false); |
| } |
| return false; |
| } |
| } |
| } |
| return false; |
| } |
| |
| bool |
| DynamicLoaderMacOSXKernel::FindTargetModule (OSKextLoadedKextSummary &image_info, bool can_create, bool *did_create_ptr) |
| { |
| if (did_create_ptr) |
| *did_create_ptr = false; |
| |
| const bool image_info_uuid_is_valid = image_info.uuid.IsValid(); |
| |
| if (image_info.module_sp) |
| { |
| if (image_info_uuid_is_valid) |
| { |
| if (image_info.module_sp->GetUUID() == image_info.uuid) |
| return true; |
| else |
| image_info.module_sp.reset(); |
| } |
| else |
| return true; |
| } |
| |
| ModuleList &target_images = m_process->GetTarget().GetImages(); |
| if (image_info_uuid_is_valid) |
| image_info.module_sp = target_images.FindModule(image_info.uuid); |
| |
| if (image_info.module_sp) |
| return true; |
| |
| ArchSpec arch (image_info.GetArchitecture ()); |
| if (can_create) |
| { |
| if (image_info_uuid_is_valid) |
| { |
| image_info.module_sp = m_process->GetTarget().GetSharedModule (FileSpec(), |
| arch, |
| &image_info.uuid); |
| if (did_create_ptr) |
| *did_create_ptr = image_info.module_sp; |
| } |
| } |
| return image_info.module_sp; |
| } |
| |
| bool |
| DynamicLoaderMacOSXKernel::UpdateCommPageLoadAddress(Module *module) |
| { |
| bool changed = false; |
| if (module) |
| { |
| ObjectFile *image_object_file = module->GetObjectFile(); |
| if (image_object_file) |
| { |
| SectionList *section_list = image_object_file->GetSectionList (); |
| if (section_list) |
| { |
| uint32_t num_sections = section_list->GetSize(); |
| for (uint32_t i=0; i<num_sections; ++i) |
| { |
| Section* section = section_list->GetSectionAtIndex (i).get(); |
| if (section) |
| { |
| const addr_t new_section_load_addr = section->GetFileAddress (); |
| const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section); |
| if (old_section_load_addr == LLDB_INVALID_ADDRESS || |
| old_section_load_addr != new_section_load_addr) |
| { |
| if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section, section->GetFileAddress ())) |
| changed = true; |
| } |
| } |
| } |
| } |
| } |
| } |
| return changed; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Update the load addresses for all segments in MODULE using the |
| // updated INFO that is passed in. |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXKernel::UpdateImageLoadAddress (OSKextLoadedKextSummary& info) |
| { |
| Module *module = info.module_sp.get(); |
| bool changed = false; |
| if (module) |
| { |
| ObjectFile *image_object_file = module->GetObjectFile(); |
| if (image_object_file) |
| { |
| SectionList *section_list = image_object_file->GetSectionList (); |
| if (section_list) |
| { |
| // We now know the slide amount, so go through all sections |
| // and update the load addresses with the correct values. |
| uint32_t num_segments = info.segments.size(); |
| for (uint32_t i=0; i<num_segments; ++i) |
| { |
| SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); |
| const addr_t new_section_load_addr = info.segments[i].vmaddr; |
| if (section_sp) |
| { |
| const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section_sp.get()); |
| if (old_section_load_addr == LLDB_INVALID_ADDRESS || |
| old_section_load_addr != new_section_load_addr) |
| { |
| if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section_sp.get(), new_section_load_addr)) |
| changed = true; |
| } |
| } |
| else |
| { |
| fprintf (stderr, |
| "warning: unable to find and load segment named '%s' at 0x%llx in '%s/%s' in macosx dynamic loader plug-in.\n", |
| info.segments[i].name.AsCString("<invalid>"), |
| (uint64_t)new_section_load_addr, |
| image_object_file->GetFileSpec().GetDirectory().AsCString(), |
| image_object_file->GetFileSpec().GetFilename().AsCString()); |
| } |
| } |
| } |
| } |
| } |
| return changed; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Update the load addresses for all segments in MODULE using the |
| // updated INFO that is passed in. |
| //---------------------------------------------------------------------- |
| bool |
| DynamicLoaderMacOSXKernel::UnloadImageLoadAddress (OSKextLoadedKextSummary& info) |
| { |
| Module *module = info.module_sp.get(); |
| bool changed = false; |
| if (module) |
| { |
| ObjectFile *image_object_file = module->GetObjectFile(); |
| if (image_object_file) |
| { |
| SectionList *section_list = image_object_file->GetSectionList (); |
| if (section_list) |
| { |
| uint32_t num_segments = info.segments.size(); |
| for (uint32_t i=0; i<num_segments; ++i) |
| { |
| SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); |
| if (section_sp) |
| { |
| const addr_t old_section_load_addr = info.segments[i].vmaddr; |
| if (m_process->GetTarget().GetSectionLoadList().SetSectionUnloaded (section_sp.get(), old_section_load_addr)) |
| changed = true; |
| } |
| else |
| { |
| fprintf (stderr, |
| "warning: unable to find and unload segment named '%s' in '%s/%s' in macosx dynamic loader plug-in.\n", |
| info.segments[i].name.AsCString("<invalid>"), |
| image_object_file->GetFileSpec().GetDirectory().AsCString(), |
| image_object_file->GetFileSpec().GetFilename().AsCString()); |
| } |
| } |
| } |
| } |
| } |
| return changed; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // 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 |
| DynamicLoaderMacOSXKernel::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) |
| |
| DynamicLoaderMacOSXKernel* dyld_instance = (DynamicLoaderMacOSXKernel*) 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. |
| |
| if (!dyld_instance->ReadAllKextSummaries(false)) |
| { |
| Process *process = context->exe_ctx.process; |
| const lldb::ABISP &abi = process->GetABI(); |
| if (abi != NULL) |
| { |
| // 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; |
| |
| void *clang_void_ptr_type = clang_ast_context->GetVoidPtrType(false); |
| void *clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); |
| input_value.SetValueType (Value::eValueTypeScalar); |
| input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); |
| argument_values.PushValue(input_value); |
| argument_values.PushValue(input_value); |
| input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); |
| argument_values.PushValue (input_value); |
| |
| if (abi->GetArgumentValues (*context->exe_ctx.thread, argument_values)) |
| { |
| uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); |
| if (dyld_mode != -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 != -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 kext_summary_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); |
| if (dyld_mode == 0) |
| { |
| // This is add: |
| dyld_instance->ParseKextSummaries (kext_summary_addr, image_infos_count); |
| } |
| else |
| { |
| // This is remove: |
| dyld_instance->RemoveModulesUsingImageInfosAddress (kext_summary_addr, image_infos_count); |
| } |
| |
| } |
| } |
| } |
| } |
| } |
| // Return true to stop the target, false to just let the target run |
| return dyld_instance->GetStopWhenImagesChange(); |
| } |
| |
| bool |
| DynamicLoaderMacOSXKernel::ReadKextSummaryHeader () |
| { |
| Mutex::Locker locker(m_mutex); |
| |
| // the all image infos is already valid for this process stop ID |
| if (m_process->GetStopID() == m_kext_summaries_stop_id) |
| return true; |
| |
| m_kext_summaries.clear(); |
| if (m_kext_summary_header_addr != LLDB_INVALID_ADDRESS) |
| { |
| const uint32_t addr_size = m_kernel.GetAddressByteSize (); |
| const ByteOrder byte_order = m_kernel.GetByteOrder(); |
| Error error; |
| // Read enough bytes for a "OSKextLoadedKextSummaryHeader" structure |
| // which is currenty 4 uint32_t and a pointer. |
| uint8_t buf[24]; |
| DataExtractor data (buf, sizeof(buf), byte_order, addr_size); |
| const size_t count = 4 * sizeof(uint32_t) + addr_size; |
| const size_t bytes_read = m_process->ReadMemory (m_kext_summary_header_addr, buf, count, error); |
| if (bytes_read == count) |
| { |
| uint32_t offset = 0; |
| m_kext_summary_header.version = data.GetU32(&offset); |
| m_kext_summary_header.entry_size = data.GetU32(&offset); |
| m_kext_summary_header.entry_count = data.GetU32(&offset); |
| m_kext_summary_header.reserved = data.GetU32(&offset); |
| m_kext_summary_header_stop_id = m_process->GetStopID(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| bool |
| DynamicLoaderMacOSXKernel::ParseKextSummaries (lldb::addr_t kext_summary_addr, uint32_t count) |
| { |
| OSKextLoadedKextSummary::collection kext_summaries; |
| LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| if (log) |
| log->Printf ("Adding %d modules.\n"); |
| |
| Mutex::Locker locker(m_mutex); |
| if (m_process->GetStopID() == m_kext_summaries_stop_id) |
| return true; |
| |
| if (!ReadKextSummaries (kext_summary_addr, count, kext_summaries)) |
| return false; |
| |
| for (uint32_t i = 0; i < count; i++) |
| { |
| if (!kext_summaries[i].UUIDValid()) |
| { |
| DataExtractor data; // Load command data |
| if (!ReadMachHeader (kext_summaries[i].address, &kext_summaries[i].header, &data)) |
| continue; |
| |
| ParseLoadCommands (data, kext_summaries[i]); |
| } |
| } |
| bool return_value = AddModulesUsingImageInfos (kext_summaries); |
| m_kext_summaries_stop_id = m_process->GetStopID(); |
| return return_value; |
| } |
| |
| // Adds the modules in image_infos to m_kext_summaries. |
| // NB don't call this passing in m_kext_summaries. |
| |
| bool |
| DynamicLoaderMacOSXKernel::AddModulesUsingImageInfos (OSKextLoadedKextSummary::collection &image_infos) |
| { |
| // Now add these images to the main list. |
| ModuleList loaded_module_list; |
| LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| |
| for (uint32_t idx = 0; idx < image_infos.size(); ++idx) |
| { |
| if (log) |
| { |
| log->Printf ("Adding new image at address=0x%16.16llx.", image_infos[idx].address); |
| image_infos[idx].PutToLog (log.get()); |
| } |
| |
| m_kext_summaries.push_back(image_infos[idx]); |
| |
| if (FindTargetModule (image_infos[idx], true, NULL)) |
| { |
| // UpdateImageLoadAddress will return true if any segments |
| // change load address. We need to check this so we don't |
| // mention that all loaded shared libraries are newly loaded |
| // each time we hit out dyld breakpoint since dyld will list all |
| // shared libraries each time. |
| if (UpdateImageLoadAddress (image_infos[idx])) |
| { |
| loaded_module_list.AppendIfNeeded (image_infos[idx].module_sp); |
| } |
| } |
| } |
| |
| if (loaded_module_list.GetSize() > 0) |
| { |
| // FIXME: This should really be in the Runtime handlers class, which should get |
| // called by the target's ModulesDidLoad, but we're doing it all locally for now |
| // to save time. |
| // Also, I'm assuming there can be only one libobjc dylib loaded... |
| |
| ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); |
| if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary()) |
| { |
| size_t num_modules = loaded_module_list.GetSize(); |
| for (int i = 0; i < num_modules; i++) |
| { |
| if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i))) |
| { |
| objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i)); |
| break; |
| } |
| } |
| } |
| if (log) |
| loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXKernel::ModulesDidLoad"); |
| m_process->GetTarget().ModulesDidLoad (loaded_module_list); |
| } |
| return true; |
| } |
| |
| bool |
| DynamicLoaderMacOSXKernel::RemoveModulesUsingImageInfosAddress (lldb::addr_t kext_summary_addr, uint32_t image_infos_count) |
| { |
| OSKextLoadedKextSummary::collection image_infos; |
| LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| |
| Mutex::Locker locker(m_mutex); |
| if (m_process->GetStopID() == m_kext_summaries_stop_id) |
| return true; |
| |
| // First read in the image_infos for the removed modules, and their headers & load commands. |
| if (!ReadKextSummaries (kext_summary_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%16.16llx.", image_infos[idx].address); |
| image_infos[idx].PutToLog (log.get()); |
| } |
| |
| // Remove this image_infos from the m_all_image_infos. We do the comparision 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. |
| |
| OSKextLoadedKextSummary::collection::iterator pos, end = m_kext_summaries.end(); |
| for (pos = m_kext_summaries.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. |
| |
| if (FindTargetModule (image_infos[idx], false, NULL)) |
| { |
| UnloadImageLoadAddress (image_infos[idx]); |
| unloaded_module_list.AppendIfNeeded (image_infos[idx].module_sp); |
| } |
| else |
| { |
| if (log) |
| { |
| log->Printf ("Could not find module for unloading info entry:"); |
| image_infos[idx].PutToLog(log.get()); |
| } |
| } |
| |
| // Then remove it from the m_kext_summaries: |
| |
| m_kext_summaries.erase(pos); |
| break; |
| } |
| } |
| |
| if (pos == end) |
| { |
| if (log) |
| { |
| log->Printf ("Could not find image_info entry for unloading image:"); |
| image_infos[idx].PutToLog(log.get()); |
| } |
| } |
| } |
| if (unloaded_module_list.GetSize() > 0) |
| { |
| if (log) |
| { |
| log->PutCString("Unloaded:"); |
| unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXKernel::ModulesDidUnload"); |
| } |
| m_process->GetTarget().ModulesDidUnload (unloaded_module_list); |
| } |
| m_kext_summaries_stop_id = m_process->GetStopID(); |
| return true; |
| } |
| |
| uint32_t |
| DynamicLoaderMacOSXKernel::ReadKextSummaries (lldb::addr_t kext_summary_addr, |
| uint32_t image_infos_count, |
| OSKextLoadedKextSummary::collection &image_infos) |
| { |
| const ByteOrder endian = m_kernel.GetByteOrder(); |
| const uint32_t addr_size = m_kernel.GetAddressByteSize(); |
| |
| image_infos.resize(image_infos_count); |
| const size_t count = image_infos.size() * m_kext_summary_header.entry_size; |
| DataBufferHeap data(count, 0); |
| Error error; |
| const size_t bytes_read = m_process->ReadMemory (kext_summary_addr, |
| data.GetBytes(), |
| data.GetByteSize(), |
| error); |
| if (bytes_read == count) |
| { |
| uint32_t offset = 0; |
| DataExtractor extractor (data.GetBytes(), data.GetByteSize(), endian, addr_size); |
| uint32_t i=0; |
| for (; i < image_infos.size() && extractor.ValidOffsetForDataOfSize(offset, m_kext_summary_header.entry_size); ++i) |
| { |
| const void *name_data = extractor.GetData(&offset, KERNEL_MODULE_MAX_NAME); |
| if (name_data == NULL) |
| break; |
| memcpy (image_infos[i].name, name_data, KERNEL_MODULE_MAX_NAME); |
| image_infos[i].uuid.SetBytes(extractor.GetData (&offset, 16)); |
| image_infos[i].address = extractor.GetU64(&offset); |
| image_infos[i].size = extractor.GetU64(&offset); |
| image_infos[i].version = extractor.GetU64(&offset); |
| image_infos[i].load_tag = extractor.GetU32(&offset); |
| image_infos[i].flags = extractor.GetU32(&offset); |
| image_infos[i].reference_list = extractor.GetU64(&offset); |
| } |
| if (i < image_infos.size()) |
| image_infos.resize(i); |
| } |
| else |
| { |
| image_infos.clear(); |
| } |
| return image_infos.size(); |
| } |
| |
| bool |
| DynamicLoaderMacOSXKernel::ReadAllKextSummaries (bool force) |
| { |
| LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); |
| |
| Mutex::Locker locker(m_mutex); |
| if (!force) |
| { |
| if (m_process->GetStopID() == m_kext_summaries_stop_id || m_kext_summaries.size() != 0) |
| return false; |
| } |
| |
| if (ReadKextSummaryHeader ()) |
| { |
| if (m_kext_summary_header.entry_count > 0) |
| { |
| if (!ParseKextSummaries (m_kext_summary_header_addr + 16, m_kext_summary_header.entry_count)) |
| { |
| DEBUG_PRINTF( "unable to read all data for all_dylib_infos."); |
| m_kext_summaries.clear(); |
| } |
| return true; |
| } |
| } |
| 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 |
| DynamicLoaderMacOSXKernel::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) |
| { |
| DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); |
| Error error; |
| size_t bytes_read = m_process->ReadMemory (addr, |
| header_bytes.GetBytes(), |
| header_bytes.GetByteSize(), |
| error); |
| if (bytes_read == sizeof(llvm::MachO::mach_header)) |
| { |
| uint32_t offset = 0; |
| ::memset (header, 0, sizeof(header)); |
| |
| // Get the magic byte unswapped so we can figure out what we are dealing with |
| DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), lldb::endian::InlHostByteOrder(), 4); |
| header->magic = data.GetU32(&offset); |
| lldb::addr_t load_cmd_addr = addr; |
| data.SetByteOrder(DynamicLoaderMacOSXKernel::GetByteOrderFromMagic(header->magic)); |
| switch (header->magic) |
| { |
| case llvm::MachO::HeaderMagic32: |
| case llvm::MachO::HeaderMagic32Swapped: |
| data.SetAddressByteSize(4); |
| load_cmd_addr += sizeof(llvm::MachO::mach_header); |
| break; |
| |
| case llvm::MachO::HeaderMagic64: |
| case llvm::MachO::HeaderMagic64Swapped: |
| 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 |
| DynamicLoaderMacOSXKernel::ParseLoadCommands (const DataExtractor& data, OSKextLoadedKextSummary& dylib_info) |
| { |
| uint32_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; |
| uint32_t load_cmd_offset = offset; |
| load_cmd.cmd = data.GetU32 (&offset); |
| load_cmd.cmdsize = data.GetU32 (&offset); |
| switch (load_cmd.cmd) |
| { |
| case llvm::MachO::LoadCommandSegment32: |
| { |
| 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::LoadCommandSegment64: |
| { |
| 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::LoadCommandUUID: |
| dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); |
| break; |
| |
| default: |
| break; |
| } |
| // Set offset to be the beginning of the next load command. |
| offset = load_cmd_offset + load_cmd.cmdsize; |
| } |
| } |
| #if 0 |
| // No slide in the kernel... |
| |
| // 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.slide = dylib_info.address - dylib_info.segments[i].vmaddr; |
| // We have found the slide amount, so we can exit |
| // this for loop. |
| break; |
| } |
| } |
| #endif |
| return cmd_idx; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Dump a Segment to the file handle provided. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXKernel::Segment::PutToLog (Log *log, lldb::addr_t slide) const |
| { |
| if (log) |
| { |
| if (slide == 0) |
| log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx)", |
| name.AsCString(""), |
| vmaddr + slide, |
| vmaddr + slide + vmsize); |
| else |
| log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx) slide = 0x%llx", |
| name.AsCString(""), |
| vmaddr + slide, |
| vmaddr + slide + vmsize, |
| slide); |
| } |
| } |
| |
| const DynamicLoaderMacOSXKernel::Segment * |
| DynamicLoaderMacOSXKernel::OSKextLoadedKextSummary::FindSegment (const ConstString &name) const |
| { |
| const size_t num_segments = segments.size(); |
| for (size_t i=0; i<num_segments; ++i) |
| { |
| if (segments[i].name == name) |
| return &segments[i]; |
| } |
| return NULL; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // Dump an image info structure to the file handle provided. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXKernel::OSKextLoadedKextSummary::PutToLog (Log *log) const |
| { |
| if (log == NULL) |
| return; |
| uint8_t *u = (uint8_t *)uuid.GetBytes(); |
| // |
| // char name[KERNEL_MODULE_MAX_NAME]; |
| // lldb::ModuleSP module_sp; |
| // lldb_private::UUID uuid; // UUID for this dylib if it has one, else all zeros |
| // uint64_t address; |
| // uint64_t size; |
| // uint64_t version; |
| // uint32_t load_tag; |
| // uint32_t flags; |
| // uint64_t reference_list; |
| // llvm::MachO::mach_header header; // The mach header for this image |
| // std::vector<Segment> segments; // All segment vmaddr and vmsize pairs for this executable (from memory of inferior) |
| |
| if (address == LLDB_INVALID_ADDRESS) |
| { |
| if (u) |
| { |
| log->Printf("\t uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X name='%s' (UNLOADED)", |
| u[ 0], u[ 1], u[ 2], u[ 3], |
| u[ 4], u[ 5], u[ 6], u[ 7], |
| u[ 8], u[ 9], u[10], u[11], |
| u[12], u[13], u[14], u[15], |
| name); |
| } |
| else |
| log->Printf("\t name='%s' (UNLOADED)", name); |
| } |
| else |
| { |
| if (u) |
| { |
| log->Printf("\taddress=0x%16.16llx uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X name='%s'", |
| address, |
| u[ 0], u[ 1], u[ 2], u[ 3], |
| u[ 4], u[ 5], u[ 6], u[ 7], |
| u[ 8], u[ 9], u[10], u[11], |
| u[12], u[13], u[14], u[15], |
| name); |
| } |
| else |
| { |
| log->Printf("\taddress=0x%16.16llx path='%s/%s'", address, name); |
| } |
| for (uint32_t i=0; i<segments.size(); ++i) |
| segments[i].PutToLog(log, 0); |
| } |
| } |
| |
| //---------------------------------------------------------------------- |
| // Dump the _dyld_all_image_infos members and all current image infos |
| // that we have parsed to the file handle provided. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXKernel::PutToLog(Log *log) const |
| { |
| if (log == NULL) |
| return; |
| |
| Mutex::Locker locker(m_mutex); |
| log->Printf("gLoadedKextSummaries = 0x%16.16llx { version=%u, entry_size=%u, entry_count=%u, reserved=%u }", |
| m_kext_summary_header_addr, |
| m_kext_summary_header.version, |
| m_kext_summary_header.entry_size, |
| m_kext_summary_header.entry_count, |
| m_kext_summary_header.reserved); |
| |
| size_t i; |
| const size_t count = m_kext_summaries.size(); |
| if (count > 0) |
| { |
| log->PutCString("Loaded:"); |
| for (i = 0; i<count; i++) |
| m_kext_summaries[i].PutToLog(log); |
| } |
| } |
| |
| void |
| DynamicLoaderMacOSXKernel::PrivateInitialize(Process *process) |
| { |
| DEBUG_PRINTF("DynamicLoaderMacOSXKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); |
| Clear(true); |
| m_process = process; |
| m_process->GetTarget().GetSectionLoadList().Clear(); |
| } |
| |
| bool |
| DynamicLoaderMacOSXKernel::SetNotificationBreakpoint () |
| { |
| // TODO: Add breakpoint to detected dynamic kext loads/unloads. We aren't |
| // doing any live dynamic checks for kernel kexts being loaded or unloaded |
| // on the fly yet. |
| // DEBUG_PRINTF("DynamicLoaderMacOSXKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); |
| // if (m_break_id == LLDB_INVALID_BREAK_ID) |
| // { |
| // if (m_kext_summaries.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. |
| // |
| // if (m_process->GetTarget().GetSectionLoadList().ResolveLoadAddress(m_kext_summaries.notification, so_addr)) |
| // { |
| // Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true).get(); |
| // dyld_break->SetCallback (DynamicLoaderMacOSXKernel::NotifyBreakpointHit, this, true); |
| // m_break_id = dyld_break->GetID(); |
| // } |
| // } |
| // } |
| return m_break_id != LLDB_INVALID_BREAK_ID; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Member function that gets called when the process state changes. |
| //---------------------------------------------------------------------- |
| void |
| DynamicLoaderMacOSXKernel::PrivateProcessStateChanged (Process *process, StateType state) |
| { |
| DEBUG_PRINTF("DynamicLoaderMacOSXKernel::%s(%s)\n", __FUNCTION__, StateAsCString(state)); |
| switch (state) |
| { |
| case eStateConnected: |
| case eStateAttaching: |
| case eStateLaunching: |
| case eStateInvalid: |
| case eStateUnloaded: |
| case eStateExited: |
| case eStateDetached: |
| Clear(false); |
| break; |
| |
| case eStateStopped: |
| // Keep trying find dyld and set our notification breakpoint each time |
| // we stop until we succeed |
| if (!DidSetNotificationBreakpoint () && m_process->IsAlive()) |
| { |
| if (LoadKernelModule()) |
| { |
| } |
| |
| SetNotificationBreakpoint (); |
| } |
| break; |
| |
| case eStateRunning: |
| case eStateStepping: |
| case eStateCrashed: |
| case eStateSuspended: |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| ThreadPlanSP |
| DynamicLoaderMacOSXKernel::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) |
| { |
| ThreadPlanSP thread_plan_sp; |
| StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); |
| const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol); |
| Symbol *current_symbol = current_context.symbol; |
| LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| |
| if (current_symbol != NULL) |
| { |
| if (current_symbol->IsTrampoline()) |
| { |
| const ConstString &trampoline_name = current_symbol->GetMangled().GetName(Mangled::ePreferMangled); |
| |
| if (trampoline_name) |
| { |
| SymbolContextList target_symbols; |
| ModuleList &images = thread.GetProcess().GetTarget().GetImages(); |
| images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, target_symbols); |
| // FIXME - Make the Run to Address take multiple addresses, and |
| // run to any of them. |
| uint32_t num_symbols = target_symbols.GetSize(); |
| if (num_symbols == 1) |
| { |
| SymbolContext context; |
| AddressRange addr_range; |
| if (target_symbols.GetContextAtIndex(0, context)) |
| { |
| context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); |
| thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, addr_range.GetBaseAddress(), stop_others)); |
| } |
| else |
| { |
| if (log) |
| log->Printf ("Couldn't resolve the symbol context."); |
| } |
| } |
| else if (num_symbols > 1) |
| { |
| std::vector<lldb::addr_t> addresses; |
| addresses.resize (num_symbols); |
| for (uint32_t i = 0; i < num_symbols; i++) |
| { |
| SymbolContext context; |
| AddressRange addr_range; |
| if (target_symbols.GetContextAtIndex(i, context)) |
| { |
| context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); |
| lldb::addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(&thread.GetProcess().GetTarget()); |
| addresses[i] = load_addr; |
| } |
| } |
| if (addresses.size() > 0) |
| thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, addresses, stop_others)); |
| else |
| { |
| if (log) |
| log->Printf ("Couldn't resolve the symbol contexts."); |
| } |
| } |
| else |
| { |
| if (log) |
| { |
| log->Printf ("Could not find symbol for trampoline target: \"%s\"", trampoline_name.AsCString()); |
| } |
| } |
| } |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("Could not find symbol for step through."); |
| } |
| |
| return thread_plan_sp; |
| } |
| |
| Error |
| DynamicLoaderMacOSXKernel::CanLoadImage () |
| { |
| Error error; |
| error.SetErrorString("always unsafe to load or unload shared libraries in the darwin kernel"); |
| return error; |
| } |
| |
| void |
| DynamicLoaderMacOSXKernel::Initialize() |
| { |
| PluginManager::RegisterPlugin (GetPluginNameStatic(), |
| GetPluginDescriptionStatic(), |
| CreateInstance); |
| } |
| |
| void |
| DynamicLoaderMacOSXKernel::Terminate() |
| { |
| PluginManager::UnregisterPlugin (CreateInstance); |
| } |
| |
| |
| const char * |
| DynamicLoaderMacOSXKernel::GetPluginNameStatic() |
| { |
| return "dynamic-loader.macosx-kernel"; |
| } |
| |
| const char * |
| DynamicLoaderMacOSXKernel::GetPluginDescriptionStatic() |
| { |
| return "Dynamic loader plug-in that watches for shared library loads/unloads in the MacOSX kernel."; |
| } |
| |
| |
| //------------------------------------------------------------------ |
| // PluginInterface protocol |
| //------------------------------------------------------------------ |
| const char * |
| DynamicLoaderMacOSXKernel::GetPluginName() |
| { |
| return "DynamicLoaderMacOSXKernel"; |
| } |
| |
| const char * |
| DynamicLoaderMacOSXKernel::GetShortPluginName() |
| { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t |
| DynamicLoaderMacOSXKernel::GetPluginVersion() |
| { |
| return 1; |
| } |
| |