diff options
Diffstat (limited to 'source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp')
| -rw-r--r-- | source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp | 1143 |
1 files changed, 0 insertions, 1143 deletions
diff --git a/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp b/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp deleted file mode 100644 index 944be9633e00..000000000000 --- a/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderDarwin.cpp +++ /dev/null @@ -1,1143 +0,0 @@ -//===-- DynamicLoaderDarwin.cpp -----------------------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "DynamicLoaderDarwin.h" - -#include "lldb/Breakpoint/StoppointCallbackContext.h" -#include "lldb/Core/Debugger.h" -#include "lldb/Core/Module.h" -#include "lldb/Core/ModuleSpec.h" -#include "lldb/Core/PluginManager.h" -#include "lldb/Core/Section.h" -#include "lldb/Expression/DiagnosticManager.h" -#include "lldb/Host/FileSystem.h" -#include "lldb/Symbol/ClangASTContext.h" -#include "lldb/Symbol/Function.h" -#include "lldb/Symbol/ObjectFile.h" -#include "lldb/Target/ABI.h" -#include "lldb/Target/ObjCLanguageRuntime.h" -#include "lldb/Target/RegisterContext.h" -#include "lldb/Target/StackFrame.h" -#include "lldb/Target/Target.h" -#include "lldb/Target/Thread.h" -#include "lldb/Target/ThreadPlanCallFunction.h" -#include "lldb/Target/ThreadPlanRunToAddress.h" -#include "lldb/Utility/DataBuffer.h" -#include "lldb/Utility/DataBufferHeap.h" -#include "lldb/Utility/Log.h" -#include "lldb/Utility/State.h" - -//#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN -#ifdef ENABLE_DEBUG_PRINTF -#include <stdio.h> -#define DEBUG_PRINTF(fmt, ...) printf(fmt, ##__VA_ARGS__) -#else -#define DEBUG_PRINTF(fmt, ...) -#endif - -#ifndef __APPLE__ -#include "Utility/UuidCompatibility.h" -#else -#include <uuid/uuid.h> -#endif - -using namespace lldb; -using namespace lldb_private; - -//---------------------------------------------------------------------- -// Constructor -//---------------------------------------------------------------------- -DynamicLoaderDarwin::DynamicLoaderDarwin(Process *process) - : DynamicLoader(process), m_dyld_module_wp(), m_libpthread_module_wp(), - m_pthread_getspecific_addr(), m_tid_to_tls_map(), m_dyld_image_infos(), - m_dyld_image_infos_stop_id(UINT32_MAX), m_dyld(), m_mutex() {} - -//---------------------------------------------------------------------- -// Destructor -//---------------------------------------------------------------------- -DynamicLoaderDarwin::~DynamicLoaderDarwin() {} - -//------------------------------------------------------------------ -/// Called after attaching a process. -/// -/// Allow DynamicLoader plug-ins to execute some code after -/// attaching to a process. -//------------------------------------------------------------------ -void DynamicLoaderDarwin::DidAttach() { - PrivateInitialize(m_process); - DoInitialImageFetch(); - SetNotificationBreakpoint(); -} - -//------------------------------------------------------------------ -/// Called after attaching a process. -/// -/// Allow DynamicLoader plug-ins to execute some code after -/// attaching to a process. -//------------------------------------------------------------------ -void DynamicLoaderDarwin::DidLaunch() { - PrivateInitialize(m_process); - DoInitialImageFetch(); - SetNotificationBreakpoint(); -} - -//---------------------------------------------------------------------- -// Clear out the state of this class. -//---------------------------------------------------------------------- -void DynamicLoaderDarwin::Clear(bool clear_process) { - std::lock_guard<std::recursive_mutex> guard(m_mutex); - if (clear_process) - m_process = NULL; - m_dyld_image_infos.clear(); - m_dyld_image_infos_stop_id = UINT32_MAX; - m_dyld.Clear(false); -} - -ModuleSP DynamicLoaderDarwin::FindTargetModuleForImageInfo( - ImageInfo &image_info, bool can_create, bool *did_create_ptr) { - if (did_create_ptr) - *did_create_ptr = false; - - Target &target = m_process->GetTarget(); - const ModuleList &target_images = target.GetImages(); - ModuleSpec module_spec(image_info.file_spec); - module_spec.GetUUID() = image_info.uuid; - ModuleSP module_sp(target_images.FindFirstModule(module_spec)); - - if (module_sp && !module_spec.GetUUID().IsValid() && - !module_sp->GetUUID().IsValid()) { - // No UUID, we must rely upon the cached module modification time and the - // modification time of the file on disk - if (module_sp->GetModificationTime() != - FileSystem::Instance().GetModificationTime(module_sp->GetFileSpec())) - module_sp.reset(); - } - - if (!module_sp) { - if (can_create) { - module_sp = target.GetSharedModule(module_spec); - if (!module_sp || module_sp->GetObjectFile() == NULL) - module_sp = m_process->ReadModuleFromMemory(image_info.file_spec, - image_info.address); - - if (did_create_ptr) - *did_create_ptr = (bool)module_sp; - } - } - return module_sp; -} - -void DynamicLoaderDarwin::UnloadImages( - const std::vector<lldb::addr_t> &solib_addresses) { - std::lock_guard<std::recursive_mutex> guard(m_mutex); - if (m_process->GetStopID() == m_dyld_image_infos_stop_id) - return; - - Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - Target &target = m_process->GetTarget(); - if (log) - log->Printf("Removing %" PRId64 " modules.", - (uint64_t)solib_addresses.size()); - - ModuleList unloaded_module_list; - - for (addr_t solib_addr : solib_addresses) { - Address header; - if (header.SetLoadAddress(solib_addr, &target)) { - if (header.GetOffset() == 0) { - ModuleSP module_to_remove(header.GetModule()); - if (module_to_remove.get()) { - if (log) - log->Printf("Removing module at address 0x%" PRIx64, solib_addr); - // remove the sections from the Target - UnloadSections(module_to_remove); - // add this to the list of modules to remove - unloaded_module_list.AppendIfNeeded(module_to_remove); - // remove the entry from the m_dyld_image_infos - ImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); - for (pos = m_dyld_image_infos.begin(); pos != end; pos++) { - if (solib_addr == (*pos).address) { - m_dyld_image_infos.erase(pos); - break; - } - } - } - } - } - } - - if (unloaded_module_list.GetSize() > 0) { - if (log) { - log->PutCString("Unloaded:"); - unloaded_module_list.LogUUIDAndPaths( - log, "DynamicLoaderDarwin::UnloadModules"); - } - m_process->GetTarget().GetImages().Remove(unloaded_module_list); - m_dyld_image_infos_stop_id = m_process->GetStopID(); - } -} - -void DynamicLoaderDarwin::UnloadAllImages() { - Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - ModuleList unloaded_modules_list; - - Target &target = m_process->GetTarget(); - const ModuleList &target_modules = target.GetImages(); - std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); - - size_t num_modules = target_modules.GetSize(); - ModuleSP dyld_sp(GetDYLDModule()); - - for (size_t i = 0; i < num_modules; i++) { - ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked(i); - - // Don't remove dyld - else we'll lose our breakpoint notifying us about - // libraries being re-loaded... - if (module_sp.get() != nullptr && module_sp.get() != dyld_sp.get()) { - UnloadSections(module_sp); - unloaded_modules_list.Append(module_sp); - } - } - - if (unloaded_modules_list.GetSize() != 0) { - if (log) { - log->PutCString("Unloaded:"); - unloaded_modules_list.LogUUIDAndPaths( - log, "DynamicLoaderDarwin::UnloadAllImages"); - } - target.GetImages().Remove(unloaded_modules_list); - m_dyld_image_infos.clear(); - m_dyld_image_infos_stop_id = m_process->GetStopID(); - } -} - -//---------------------------------------------------------------------- -// Update the load addresses for all segments in MODULE using the updated INFO -// that is passed in. -//---------------------------------------------------------------------- -bool DynamicLoaderDarwin::UpdateImageLoadAddress(Module *module, - ImageInfo &info) { - bool changed = false; - if (module) { - ObjectFile *image_object_file = module->GetObjectFile(); - if (image_object_file) { - SectionList *section_list = image_object_file->GetSectionList(); - if (section_list) { - std::vector<uint32_t> inaccessible_segment_indexes; - // We now know the slide amount, so go through all sections and update - // the load addresses with the correct values. - const size_t num_segments = info.segments.size(); - for (size_t i = 0; i < num_segments; ++i) { - // Only load a segment if it has protections. Things like __PAGEZERO - // don't have any protections, and they shouldn't be slid - SectionSP section_sp( - section_list->FindSectionByName(info.segments[i].name)); - - if (info.segments[i].maxprot == 0) { - inaccessible_segment_indexes.push_back(i); - } else { - const addr_t new_section_load_addr = - info.segments[i].vmaddr + info.slide; - static ConstString g_section_name_LINKEDIT("__LINKEDIT"); - - if (section_sp) { - // __LINKEDIT sections from files in the shared cache can overlap - // so check to see what the segment name is and pass "false" so - // we don't warn of overlapping "Section" objects, and "true" for - // all other sections. - const bool warn_multiple = - section_sp->GetName() != g_section_name_LINKEDIT; - - changed = m_process->GetTarget().SetSectionLoadAddress( - section_sp, new_section_load_addr, warn_multiple); - } else { - Host::SystemLog( - Host::eSystemLogWarning, - "warning: unable to find and load segment named '%s' at " - "0x%" PRIx64 " in '%s' in macosx dynamic loader plug-in.\n", - info.segments[i].name.AsCString("<invalid>"), - (uint64_t)new_section_load_addr, - image_object_file->GetFileSpec().GetPath().c_str()); - } - } - } - - // If the loaded the file (it changed) and we have segments that are - // not readable or writeable, add them to the invalid memory region - // cache for the process. This will typically only be the __PAGEZERO - // segment in the main executable. We might be able to apply this more - // generally to more sections that have no protections in the future, - // but for now we are going to just do __PAGEZERO. - if (changed && !inaccessible_segment_indexes.empty()) { - for (uint32_t i = 0; i < inaccessible_segment_indexes.size(); ++i) { - const uint32_t seg_idx = inaccessible_segment_indexes[i]; - SectionSP section_sp( - section_list->FindSectionByName(info.segments[seg_idx].name)); - - if (section_sp) { - static ConstString g_pagezero_section_name("__PAGEZERO"); - if (g_pagezero_section_name == section_sp->GetName()) { - // __PAGEZERO never slides... - const lldb::addr_t vmaddr = info.segments[seg_idx].vmaddr; - const lldb::addr_t vmsize = info.segments[seg_idx].vmsize; - Process::LoadRange pagezero_range(vmaddr, vmsize); - m_process->AddInvalidMemoryRegion(pagezero_range); - } - } - } - } - } - } - } - // We might have an in memory image that was loaded as soon as it was created - if (info.load_stop_id == m_process->GetStopID()) - changed = true; - else if (changed) { - // Update the stop ID when this library was updated - info.load_stop_id = m_process->GetStopID(); - } - return changed; -} - -//---------------------------------------------------------------------- -// Unload the segments in MODULE using the INFO that is passed in. -//---------------------------------------------------------------------- -bool DynamicLoaderDarwin::UnloadModuleSections(Module *module, - ImageInfo &info) { - bool changed = false; - if (module) { - ObjectFile *image_object_file = module->GetObjectFile(); - if (image_object_file) { - SectionList *section_list = image_object_file->GetSectionList(); - if (section_list) { - const size_t num_segments = info.segments.size(); - for (size_t i = 0; i < num_segments; ++i) { - SectionSP section_sp( - section_list->FindSectionByName(info.segments[i].name)); - if (section_sp) { - const addr_t old_section_load_addr = - info.segments[i].vmaddr + info.slide; - if (m_process->GetTarget().SetSectionUnloaded( - section_sp, old_section_load_addr)) - changed = true; - } else { - Host::SystemLog(Host::eSystemLogWarning, - "warning: unable to find and unload segment named " - "'%s' in '%s' in macosx dynamic loader plug-in.\n", - info.segments[i].name.AsCString("<invalid>"), - image_object_file->GetFileSpec().GetPath().c_str()); - } - } - } - } - } - return changed; -} - -// Given a JSON dictionary (from debugserver, most likely) of binary images -// loaded in the inferior process, add the images to the ImageInfo collection. - -bool DynamicLoaderDarwin::JSONImageInformationIntoImageInfo( - StructuredData::ObjectSP image_details, - ImageInfo::collection &image_infos) { - StructuredData::ObjectSP images_sp = - image_details->GetAsDictionary()->GetValueForKey("images"); - if (images_sp.get() == nullptr) - return false; - - image_infos.resize(images_sp->GetAsArray()->GetSize()); - - for (size_t i = 0; i < image_infos.size(); i++) { - StructuredData::ObjectSP image_sp = - images_sp->GetAsArray()->GetItemAtIndex(i); - if (image_sp.get() == nullptr || image_sp->GetAsDictionary() == nullptr) - return false; - StructuredData::Dictionary *image = image_sp->GetAsDictionary(); - // clang-format off - if (!image->HasKey("load_address") || - !image->HasKey("pathname") || - !image->HasKey("mod_date") || - !image->HasKey("mach_header") || - image->GetValueForKey("mach_header")->GetAsDictionary() == nullptr || - !image->HasKey("segments") || - image->GetValueForKey("segments")->GetAsArray() == nullptr || - !image->HasKey("uuid")) { - return false; - } - // clang-format on - image_infos[i].address = - image->GetValueForKey("load_address")->GetAsInteger()->GetValue(); - image_infos[i].mod_date = - image->GetValueForKey("mod_date")->GetAsInteger()->GetValue(); - image_infos[i].file_spec.SetFile( - image->GetValueForKey("pathname")->GetAsString()->GetValue(), - FileSpec::Style::native); - - StructuredData::Dictionary *mh = - image->GetValueForKey("mach_header")->GetAsDictionary(); - image_infos[i].header.magic = - mh->GetValueForKey("magic")->GetAsInteger()->GetValue(); - image_infos[i].header.cputype = - mh->GetValueForKey("cputype")->GetAsInteger()->GetValue(); - image_infos[i].header.cpusubtype = - mh->GetValueForKey("cpusubtype")->GetAsInteger()->GetValue(); - image_infos[i].header.filetype = - mh->GetValueForKey("filetype")->GetAsInteger()->GetValue(); - - if (image->HasKey("min_version_os_name")) { - std::string os_name = image->GetValueForKey("min_version_os_name") - ->GetAsString() - ->GetValue(); - if (os_name == "macosx") - image_infos[i].os_type = llvm::Triple::MacOSX; - else if (os_name == "ios" || os_name == "iphoneos") - image_infos[i].os_type = llvm::Triple::IOS; - else if (os_name == "tvos") - image_infos[i].os_type = llvm::Triple::TvOS; - else if (os_name == "watchos") - image_infos[i].os_type = llvm::Triple::WatchOS; - // NEED_BRIDGEOS_TRIPLE else if (os_name == "bridgeos") - // NEED_BRIDGEOS_TRIPLE image_infos[i].os_type = llvm::Triple::BridgeOS; - } - if (image->HasKey("min_version_os_sdk")) { - image_infos[i].min_version_os_sdk = - image->GetValueForKey("min_version_os_sdk") - ->GetAsString() - ->GetValue(); - } - - // Fields that aren't used by DynamicLoaderDarwin so debugserver doesn't - // currently send them in the reply. - - if (mh->HasKey("flags")) - image_infos[i].header.flags = - mh->GetValueForKey("flags")->GetAsInteger()->GetValue(); - else - image_infos[i].header.flags = 0; - - if (mh->HasKey("ncmds")) - image_infos[i].header.ncmds = - mh->GetValueForKey("ncmds")->GetAsInteger()->GetValue(); - else - image_infos[i].header.ncmds = 0; - - if (mh->HasKey("sizeofcmds")) - image_infos[i].header.sizeofcmds = - mh->GetValueForKey("sizeofcmds")->GetAsInteger()->GetValue(); - else - image_infos[i].header.sizeofcmds = 0; - - StructuredData::Array *segments = - image->GetValueForKey("segments")->GetAsArray(); - uint32_t segcount = segments->GetSize(); - for (size_t j = 0; j < segcount; j++) { - Segment segment; - StructuredData::Dictionary *seg = - segments->GetItemAtIndex(j)->GetAsDictionary(); - segment.name = - ConstString(seg->GetValueForKey("name")->GetAsString()->GetValue()); - segment.vmaddr = - seg->GetValueForKey("vmaddr")->GetAsInteger()->GetValue(); - segment.vmsize = - seg->GetValueForKey("vmsize")->GetAsInteger()->GetValue(); - segment.fileoff = - seg->GetValueForKey("fileoff")->GetAsInteger()->GetValue(); - segment.filesize = - seg->GetValueForKey("filesize")->GetAsInteger()->GetValue(); - segment.maxprot = - seg->GetValueForKey("maxprot")->GetAsInteger()->GetValue(); - - // Fields that aren't used by DynamicLoaderDarwin so debugserver doesn't - // currently send them in the reply. - - if (seg->HasKey("initprot")) - segment.initprot = - seg->GetValueForKey("initprot")->GetAsInteger()->GetValue(); - else - segment.initprot = 0; - - if (seg->HasKey("flags")) - segment.flags = - seg->GetValueForKey("flags")->GetAsInteger()->GetValue(); - else - segment.flags = 0; - - if (seg->HasKey("nsects")) - segment.nsects = - seg->GetValueForKey("nsects")->GetAsInteger()->GetValue(); - else - segment.nsects = 0; - - image_infos[i].segments.push_back(segment); - } - - image_infos[i].uuid.SetFromStringRef( - image->GetValueForKey("uuid")->GetAsString()->GetValue()); - - // All sections listed in the dyld image info structure will all either be - // fixed up already, or they will all be off by a single slide amount that - // is determined by finding the first segment that is at file offset zero - // which also has bytes (a file size that is greater than zero) in the - // object file. - - // Determine the slide amount (if any) - const size_t num_sections = image_infos[i].segments.size(); - for (size_t k = 0; k < num_sections; ++k) { - // Iterate through the object file sections to find the first section - // that starts of file offset zero and that has bytes in the file... - if ((image_infos[i].segments[k].fileoff == 0 && - image_infos[i].segments[k].filesize > 0) || - (image_infos[i].segments[k].name == ConstString("__TEXT"))) { - image_infos[i].slide = - image_infos[i].address - image_infos[i].segments[k].vmaddr; - // We have found the slide amount, so we can exit this for loop. - break; - } - } - } - - return true; -} - -void DynamicLoaderDarwin::UpdateSpecialBinariesFromNewImageInfos( - ImageInfo::collection &image_infos) { - uint32_t exe_idx = UINT32_MAX; - uint32_t dyld_idx = UINT32_MAX; - Target &target = m_process->GetTarget(); - Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - ConstString g_dyld_sim_filename("dyld_sim"); - - ArchSpec target_arch = target.GetArchitecture(); - const size_t image_infos_size = image_infos.size(); - for (size_t i = 0; i < image_infos_size; i++) { - if (image_infos[i].header.filetype == llvm::MachO::MH_DYLINKER) { - // In a "simulator" process (an x86 process that is - // ios/tvos/watchos/bridgeos) we will have two dyld modules -- - // a "dyld" that we want to keep track of, and a "dyld_sim" which - // we don't need to keep track of here. If the target is an x86 - // system and the OS of the dyld binary is ios/tvos/watchos/bridgeos, - // then we are looking at dyld_sym. - - // debugserver has only recently (late 2016) started sending up the os - // type for each binary it sees -- so if we don't have an os type, use a - // filename check as our next best guess. - if (image_infos[i].os_type == llvm::Triple::OSType::UnknownOS) { - if (image_infos[i].file_spec.GetFilename() != g_dyld_sim_filename) { - dyld_idx = i; - } - } else if (target_arch.GetTriple().getArch() == llvm::Triple::x86 || - target_arch.GetTriple().getArch() == llvm::Triple::x86_64) { - if (image_infos[i].os_type != llvm::Triple::OSType::IOS && - image_infos[i].os_type != llvm::Triple::TvOS && - image_infos[i].os_type != llvm::Triple::WatchOS) { - // NEED_BRIDGEOS_TRIPLE image_infos[i].os_type != llvm::Triple::BridgeOS) { - dyld_idx = i; - } - } - else { - // catch-all for any other environment -- trust that dyld is actually - // dyld - dyld_idx = i; - } - } else if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) { - exe_idx = i; - } - } - - if (exe_idx != UINT32_MAX) { - const bool can_create = true; - ModuleSP exe_module_sp( - FindTargetModuleForImageInfo(image_infos[exe_idx], can_create, NULL)); - if (exe_module_sp) { - if (log) - log->Printf("Found executable module: %s", - exe_module_sp->GetFileSpec().GetPath().c_str()); - target.GetImages().AppendIfNeeded(exe_module_sp); - UpdateImageLoadAddress(exe_module_sp.get(), image_infos[exe_idx]); - if (exe_module_sp.get() != target.GetExecutableModulePointer()) { - target.SetExecutableModule(exe_module_sp, eLoadDependentsNo); - } - } - } - - if (dyld_idx != UINT32_MAX) { - const bool can_create = true; - ModuleSP dyld_sp = - FindTargetModuleForImageInfo(image_infos[dyld_idx], can_create, NULL); - if (dyld_sp.get()) { - if (log) - log->Printf("Found dyld module: %s", - dyld_sp->GetFileSpec().GetPath().c_str()); - target.GetImages().AppendIfNeeded(dyld_sp); - UpdateImageLoadAddress(dyld_sp.get(), image_infos[dyld_idx]); - SetDYLDModule(dyld_sp); - } - } -} - -void DynamicLoaderDarwin::UpdateDYLDImageInfoFromNewImageInfo( - ImageInfo &image_info) { - if (image_info.header.filetype == llvm::MachO::MH_DYLINKER) { - const bool can_create = true; - ModuleSP dyld_sp = - FindTargetModuleForImageInfo(image_info, can_create, NULL); - if (dyld_sp.get()) { - Target &target = m_process->GetTarget(); - target.GetImages().AppendIfNeeded(dyld_sp); - UpdateImageLoadAddress(dyld_sp.get(), image_info); - SetDYLDModule(dyld_sp); - } - } -} - -void DynamicLoaderDarwin::SetDYLDModule(lldb::ModuleSP &dyld_module_sp) { - m_dyld_module_wp = dyld_module_sp; -} - -ModuleSP DynamicLoaderDarwin::GetDYLDModule() { - ModuleSP dyld_sp(m_dyld_module_wp.lock()); - return dyld_sp; -} - -bool DynamicLoaderDarwin::AddModulesUsingImageInfos( - ImageInfo::collection &image_infos) { - std::lock_guard<std::recursive_mutex> guard(m_mutex); - // Now add these images to the main list. - ModuleList loaded_module_list; - Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - Target &target = m_process->GetTarget(); - ModuleList &target_images = target.GetImages(); - - for (uint32_t idx = 0; idx < image_infos.size(); ++idx) { - if (log) { - log->Printf("Adding new image at address=0x%16.16" PRIx64 ".", - image_infos[idx].address); - image_infos[idx].PutToLog(log); - } - - m_dyld_image_infos.push_back(image_infos[idx]); - - ModuleSP image_module_sp( - FindTargetModuleForImageInfo(image_infos[idx], true, NULL)); - - if (image_module_sp) { - ObjectFile *objfile = image_module_sp->GetObjectFile(); - if (objfile) { - SectionList *sections = objfile->GetSectionList(); - if (sections) { - ConstString commpage_dbstr("__commpage"); - Section *commpage_section = - sections->FindSectionByName(commpage_dbstr).get(); - if (commpage_section) { - ModuleSpec module_spec(objfile->GetFileSpec(), - image_infos[idx].GetArchitecture()); - module_spec.GetObjectName() = commpage_dbstr; - ModuleSP commpage_image_module_sp( - target_images.FindFirstModule(module_spec)); - if (!commpage_image_module_sp) { - module_spec.SetObjectOffset(objfile->GetFileOffset() + - commpage_section->GetFileOffset()); - module_spec.SetObjectSize(objfile->GetByteSize()); - commpage_image_module_sp = target.GetSharedModule(module_spec); - if (!commpage_image_module_sp || - commpage_image_module_sp->GetObjectFile() == NULL) { - commpage_image_module_sp = m_process->ReadModuleFromMemory( - image_infos[idx].file_spec, image_infos[idx].address); - // Always load a memory image right away in the target in case - // we end up trying to read the symbol table from memory... The - // __LINKEDIT will need to be mapped so we can figure out where - // the symbol table bits are... - bool changed = false; - UpdateImageLoadAddress(commpage_image_module_sp.get(), - image_infos[idx]); - target.GetImages().Append(commpage_image_module_sp); - if (changed) { - image_infos[idx].load_stop_id = m_process->GetStopID(); - loaded_module_list.AppendIfNeeded(commpage_image_module_sp); - } - } - } - } - } - } - - // UpdateImageLoadAddress will return true if any segments change load - // address. We need to check this so we don't mention that all loaded - // shared libraries are newly loaded each time we hit out dyld breakpoint - // since dyld will list all shared libraries each time. - if (UpdateImageLoadAddress(image_module_sp.get(), image_infos[idx])) { - target_images.AppendIfNeeded(image_module_sp); - loaded_module_list.AppendIfNeeded(image_module_sp); - } - } - } - - if (loaded_module_list.GetSize() > 0) { - if (log) - loaded_module_list.LogUUIDAndPaths(log, - "DynamicLoaderDarwin::ModulesDidLoad"); - m_process->GetTarget().ModulesDidLoad(loaded_module_list); - } - return true; -} - -//---------------------------------------------------------------------- -// On Mac OS X libobjc (the Objective-C runtime) has several critical dispatch -// functions written in hand-written assembly, and also have hand-written -// unwind information in the eh_frame section. Normally we prefer analyzing -// the assembly instructions of a currently executing frame to unwind from that -// frame -- but on hand-written functions this profiling can fail. We should -// use the eh_frame instructions for these functions all the time. -// -// As an aside, it would be better if the eh_frame entries had a flag (or were -// extensible so they could have an Apple-specific flag) which indicates that -// the instructions are asynchronous -- accurate at every instruction, instead -// of our normal default assumption that they are not. -//---------------------------------------------------------------------- - -bool DynamicLoaderDarwin::AlwaysRelyOnEHUnwindInfo(SymbolContext &sym_ctx) { - ModuleSP module_sp; - if (sym_ctx.symbol) { - module_sp = sym_ctx.symbol->GetAddressRef().GetModule(); - } - if (module_sp.get() == NULL && sym_ctx.function) { - module_sp = - sym_ctx.function->GetAddressRange().GetBaseAddress().GetModule(); - } - if (module_sp.get() == NULL) - return false; - - ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); - return objc_runtime != NULL && objc_runtime->IsModuleObjCLibrary(module_sp); -} - -//---------------------------------------------------------------------- -// Dump a Segment to the file handle provided. -//---------------------------------------------------------------------- -void DynamicLoaderDarwin::Segment::PutToLog(Log *log, - lldb::addr_t slide) const { - if (log) { - if (slide == 0) - log->Printf("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")", - name.AsCString(""), vmaddr + slide, vmaddr + slide + vmsize); - else - log->Printf("\t\t%16s [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 - ") slide = 0x%" PRIx64, - name.AsCString(""), vmaddr + slide, vmaddr + slide + vmsize, - slide); - } -} - -const DynamicLoaderDarwin::Segment * -DynamicLoaderDarwin::ImageInfo::FindSegment(const ConstString &name) const { - const size_t num_segments = segments.size(); - for (size_t i = 0; i < num_segments; ++i) { - if (segments[i].name == name) - return &segments[i]; - } - return NULL; -} - -//---------------------------------------------------------------------- -// Dump an image info structure to the file handle provided. -//---------------------------------------------------------------------- -void DynamicLoaderDarwin::ImageInfo::PutToLog(Log *log) const { - if (!log) - return; - if (address == LLDB_INVALID_ADDRESS) { - LLDB_LOG(log, "modtime={0:x+8} uuid={1} path='{2}' (UNLOADED)", mod_date, - uuid.GetAsString(), file_spec.GetPath()); - } else { - LLDB_LOG(log, "address={0:x+16} modtime={1:x+8} uuid={2} path='{3}'", - address, mod_date, uuid.GetAsString(), file_spec.GetPath()); - for (uint32_t i = 0; i < segments.size(); ++i) - segments[i].PutToLog(log, slide); - } -} - -void DynamicLoaderDarwin::PrivateInitialize(Process *process) { - DEBUG_PRINTF("DynamicLoaderDarwin::%s() process state = %s\n", __FUNCTION__, - StateAsCString(m_process->GetState())); - Clear(true); - m_process = process; - m_process->GetTarget().ClearAllLoadedSections(); -} - -//---------------------------------------------------------------------- -// Member function that gets called when the process state changes. -//---------------------------------------------------------------------- -void DynamicLoaderDarwin::PrivateProcessStateChanged(Process *process, - StateType state) { - DEBUG_PRINTF("DynamicLoaderDarwin::%s(%s)\n", __FUNCTION__, - StateAsCString(state)); - switch (state) { - case eStateConnected: - case eStateAttaching: - case eStateLaunching: - case eStateInvalid: - case eStateUnloaded: - case eStateExited: - case eStateDetached: - Clear(false); - break; - - case eStateStopped: - // Keep trying find dyld and set our notification breakpoint each time we - // stop until we succeed - if (!DidSetNotificationBreakpoint() && m_process->IsAlive()) { - if (NeedToDoInitialImageFetch()) - DoInitialImageFetch(); - - SetNotificationBreakpoint(); - } - break; - - case eStateRunning: - case eStateStepping: - case eStateCrashed: - case eStateSuspended: - break; - } -} - -ThreadPlanSP -DynamicLoaderDarwin::GetStepThroughTrampolinePlan(Thread &thread, - bool stop_others) { - ThreadPlanSP thread_plan_sp; - StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); - const SymbolContext ¤t_context = - current_frame->GetSymbolContext(eSymbolContextSymbol); - Symbol *current_symbol = current_context.symbol; - Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP)); - TargetSP target_sp(thread.CalculateTarget()); - - if (current_symbol != NULL) { - std::vector<Address> addresses; - - if (current_symbol->IsTrampoline()) { - const ConstString &trampoline_name = current_symbol->GetMangled().GetName( - current_symbol->GetLanguage(), Mangled::ePreferMangled); - - if (trampoline_name) { - const ModuleList &images = target_sp->GetImages(); - - SymbolContextList code_symbols; - images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, - code_symbols); - size_t num_code_symbols = code_symbols.GetSize(); - - if (num_code_symbols > 0) { - for (uint32_t i = 0; i < num_code_symbols; i++) { - SymbolContext context; - AddressRange addr_range; - if (code_symbols.GetContextAtIndex(i, context)) { - context.GetAddressRange(eSymbolContextEverything, 0, false, - addr_range); - addresses.push_back(addr_range.GetBaseAddress()); - if (log) { - addr_t load_addr = - addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); - - log->Printf("Found a trampoline target symbol at 0x%" PRIx64 - ".", - load_addr); - } - } - } - } - - SymbolContextList reexported_symbols; - images.FindSymbolsWithNameAndType( - trampoline_name, eSymbolTypeReExported, reexported_symbols); - size_t num_reexported_symbols = reexported_symbols.GetSize(); - if (num_reexported_symbols > 0) { - for (uint32_t i = 0; i < num_reexported_symbols; i++) { - SymbolContext context; - if (reexported_symbols.GetContextAtIndex(i, context)) { - if (context.symbol) { - Symbol *actual_symbol = - context.symbol->ResolveReExportedSymbol(*target_sp.get()); - if (actual_symbol) { - const Address actual_symbol_addr = - actual_symbol->GetAddress(); - if (actual_symbol_addr.IsValid()) { - addresses.push_back(actual_symbol_addr); - if (log) { - lldb::addr_t load_addr = - actual_symbol_addr.GetLoadAddress(target_sp.get()); - log->Printf( - "Found a re-exported symbol: %s at 0x%" PRIx64 ".", - actual_symbol->GetName().GetCString(), load_addr); - } - } - } - } - } - } - } - - SymbolContextList indirect_symbols; - images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeResolver, - indirect_symbols); - size_t num_indirect_symbols = indirect_symbols.GetSize(); - if (num_indirect_symbols > 0) { - for (uint32_t i = 0; i < num_indirect_symbols; i++) { - SymbolContext context; - AddressRange addr_range; - if (indirect_symbols.GetContextAtIndex(i, context)) { - context.GetAddressRange(eSymbolContextEverything, 0, false, - addr_range); - addresses.push_back(addr_range.GetBaseAddress()); - if (log) { - addr_t load_addr = - addr_range.GetBaseAddress().GetLoadAddress(target_sp.get()); - - log->Printf("Found an indirect target symbol at 0x%" PRIx64 ".", - load_addr); - } - } - } - } - } - } else if (current_symbol->GetType() == eSymbolTypeReExported) { - // I am not sure we could ever end up stopped AT a re-exported symbol. - // But just in case: - - const Symbol *actual_symbol = - current_symbol->ResolveReExportedSymbol(*(target_sp.get())); - if (actual_symbol) { - Address target_addr(actual_symbol->GetAddress()); - if (target_addr.IsValid()) { - if (log) - log->Printf( - "Found a re-exported symbol: %s pointing to: %s at 0x%" PRIx64 - ".", - current_symbol->GetName().GetCString(), - actual_symbol->GetName().GetCString(), - target_addr.GetLoadAddress(target_sp.get())); - addresses.push_back(target_addr.GetLoadAddress(target_sp.get())); - } - } - } - - if (addresses.size() > 0) { - // First check whether any of the addresses point to Indirect symbols, - // and if they do, resolve them: - std::vector<lldb::addr_t> load_addrs; - for (Address address : addresses) { - Symbol *symbol = address.CalculateSymbolContextSymbol(); - if (symbol && symbol->IsIndirect()) { - Status error; - Address symbol_address = symbol->GetAddress(); - addr_t resolved_addr = thread.GetProcess()->ResolveIndirectFunction( - &symbol_address, error); - if (error.Success()) { - load_addrs.push_back(resolved_addr); - if (log) - log->Printf("ResolveIndirectFunction found resolved target for " - "%s at 0x%" PRIx64 ".", - symbol->GetName().GetCString(), resolved_addr); - } - } else { - load_addrs.push_back(address.GetLoadAddress(target_sp.get())); - } - } - thread_plan_sp.reset( - new ThreadPlanRunToAddress(thread, load_addrs, stop_others)); - } - } else { - if (log) - log->Printf("Could not find symbol for step through."); - } - - return thread_plan_sp; -} - -size_t DynamicLoaderDarwin::FindEquivalentSymbols( - lldb_private::Symbol *original_symbol, lldb_private::ModuleList &images, - lldb_private::SymbolContextList &equivalent_symbols) { - const ConstString &trampoline_name = original_symbol->GetMangled().GetName( - original_symbol->GetLanguage(), Mangled::ePreferMangled); - if (!trampoline_name) - return 0; - - size_t initial_size = equivalent_symbols.GetSize(); - - static const char *resolver_name_regex = "(_gc|_non_gc|\\$[A-Za-z0-9\\$]+)$"; - std::string equivalent_regex_buf("^"); - equivalent_regex_buf.append(trampoline_name.GetCString()); - equivalent_regex_buf.append(resolver_name_regex); - - RegularExpression equivalent_name_regex(equivalent_regex_buf); - const bool append = true; - images.FindSymbolsMatchingRegExAndType(equivalent_name_regex, eSymbolTypeCode, - equivalent_symbols, append); - - return equivalent_symbols.GetSize() - initial_size; -} - -lldb::ModuleSP DynamicLoaderDarwin::GetPThreadLibraryModule() { - ModuleSP module_sp = m_libpthread_module_wp.lock(); - if (!module_sp) { - SymbolContextList sc_list; - ModuleSpec module_spec; - module_spec.GetFileSpec().GetFilename().SetCString( - "libsystem_pthread.dylib"); - ModuleList module_list; - if (m_process->GetTarget().GetImages().FindModules(module_spec, - module_list)) { - if (module_list.GetSize() == 1) { - module_sp = module_list.GetModuleAtIndex(0); - if (module_sp) - m_libpthread_module_wp = module_sp; - } - } - } - return module_sp; -} - -Address DynamicLoaderDarwin::GetPthreadSetSpecificAddress() { - if (!m_pthread_getspecific_addr.IsValid()) { - ModuleSP module_sp = GetPThreadLibraryModule(); - if (module_sp) { - lldb_private::SymbolContextList sc_list; - module_sp->FindSymbolsWithNameAndType(ConstString("pthread_getspecific"), - eSymbolTypeCode, sc_list); - SymbolContext sc; - if (sc_list.GetContextAtIndex(0, sc)) { - if (sc.symbol) - m_pthread_getspecific_addr = sc.symbol->GetAddress(); - } - } - } - return m_pthread_getspecific_addr; -} - -lldb::addr_t -DynamicLoaderDarwin::GetThreadLocalData(const lldb::ModuleSP module_sp, - const lldb::ThreadSP thread_sp, - lldb::addr_t tls_file_addr) { - if (!thread_sp || !module_sp) - return LLDB_INVALID_ADDRESS; - - std::lock_guard<std::recursive_mutex> guard(m_mutex); - - const uint32_t addr_size = m_process->GetAddressByteSize(); - uint8_t buf[sizeof(lldb::addr_t) * 3]; - - lldb_private::Address tls_addr; - if (module_sp->ResolveFileAddress(tls_file_addr, tls_addr)) { - Status error; - const size_t tsl_data_size = addr_size * 3; - Target &target = m_process->GetTarget(); - if (target.ReadMemory(tls_addr, false, buf, tsl_data_size, error) == - tsl_data_size) { - const ByteOrder byte_order = m_process->GetByteOrder(); - DataExtractor data(buf, sizeof(buf), byte_order, addr_size); - lldb::offset_t offset = addr_size; // Skip the first pointer - const lldb::addr_t pthread_key = data.GetAddress(&offset); - const lldb::addr_t tls_offset = data.GetAddress(&offset); - if (pthread_key != 0) { - // First check to see if we have already figured out the location of - // TLS data for the pthread_key on a specific thread yet. If we have we - // can re-use it since its location will not change unless the process - // execs. - const tid_t tid = thread_sp->GetID(); - auto tid_pos = m_tid_to_tls_map.find(tid); - if (tid_pos != m_tid_to_tls_map.end()) { - auto tls_pos = tid_pos->second.find(pthread_key); - if (tls_pos != tid_pos->second.end()) { - return tls_pos->second + tls_offset; - } - } - StackFrameSP frame_sp = thread_sp->GetStackFrameAtIndex(0); - if (frame_sp) { - ClangASTContext *clang_ast_context = - target.GetScratchClangASTContext(); - - if (!clang_ast_context) - return LLDB_INVALID_ADDRESS; - - CompilerType clang_void_ptr_type = - clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); - Address pthread_getspecific_addr = GetPthreadSetSpecificAddress(); - if (pthread_getspecific_addr.IsValid()) { - EvaluateExpressionOptions options; - - lldb::ThreadPlanSP thread_plan_sp(new ThreadPlanCallFunction( - *thread_sp, pthread_getspecific_addr, clang_void_ptr_type, - llvm::ArrayRef<lldb::addr_t>(pthread_key), options)); - - DiagnosticManager execution_errors; - ExecutionContext exe_ctx(thread_sp); - lldb::ExpressionResults results = m_process->RunThreadPlan( - exe_ctx, thread_plan_sp, options, execution_errors); - - if (results == lldb::eExpressionCompleted) { - lldb::ValueObjectSP result_valobj_sp = - thread_plan_sp->GetReturnValueObject(); - if (result_valobj_sp) { - const lldb::addr_t pthread_key_data = - result_valobj_sp->GetValueAsUnsigned(0); - if (pthread_key_data) { - m_tid_to_tls_map[tid].insert( - std::make_pair(pthread_key, pthread_key_data)); - return pthread_key_data + tls_offset; - } - } - } - } - } - } - } - } - return LLDB_INVALID_ADDRESS; -} - -bool DynamicLoaderDarwin::UseDYLDSPI(Process *process) { - Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - bool use_new_spi_interface = false; - - llvm::VersionTuple version = process->GetHostOSVersion(); - if (!version.empty()) { - const llvm::Triple::OSType os_type = - process->GetTarget().GetArchitecture().GetTriple().getOS(); - - // macOS 10.12 and newer - if (os_type == llvm::Triple::MacOSX && - version >= llvm::VersionTuple(10, 12)) - use_new_spi_interface = true; - - // iOS 10 and newer - if (os_type == llvm::Triple::IOS && version >= llvm::VersionTuple(10)) - use_new_spi_interface = true; - - // tvOS 10 and newer - if (os_type == llvm::Triple::TvOS && version >= llvm::VersionTuple(10)) - use_new_spi_interface = true; - - // watchOS 3 and newer - if (os_type == llvm::Triple::WatchOS && version >= llvm::VersionTuple(3)) - use_new_spi_interface = true; - - // NEED_BRIDGEOS_TRIPLE // Any BridgeOS - // NEED_BRIDGEOS_TRIPLE if (os_type == llvm::Triple::BridgeOS) - // NEED_BRIDGEOS_TRIPLE use_new_spi_interface = true; - } - - if (log) { - if (use_new_spi_interface) - log->Printf( - "DynamicLoaderDarwin::UseDYLDSPI: Use new DynamicLoader plugin"); - else - log->Printf( - "DynamicLoaderDarwin::UseDYLDSPI: Use old DynamicLoader plugin"); - } - return use_new_spi_interface; -} |