diff options
Diffstat (limited to 'source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOSXDYLD.cpp')
| -rw-r--r-- | source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOSXDYLD.cpp | 2035 |
1 files changed, 1014 insertions, 1021 deletions
diff --git a/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOSXDYLD.cpp b/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOSXDYLD.cpp index a8bc216fb17e..9c5f1bce3bd3 100644 --- a/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOSXDYLD.cpp +++ b/source/Plugins/DynamicLoader/MacOSX-DYLD/DynamicLoaderMacOSXDYLD.cpp @@ -20,21 +20,21 @@ #include "lldb/Symbol/ClangASTContext.h" #include "lldb/Symbol/Function.h" #include "lldb/Symbol/ObjectFile.h" -#include "lldb/Target/ObjCLanguageRuntime.h" #include "lldb/Target/ABI.h" +#include "lldb/Target/ObjCLanguageRuntime.h" #include "lldb/Target/RegisterContext.h" +#include "lldb/Target/StackFrame.h" #include "lldb/Target/Target.h" #include "lldb/Target/Thread.h" #include "lldb/Target/ThreadPlanRunToAddress.h" -#include "lldb/Target/StackFrame.h" -#include "DynamicLoaderMacOSXDYLD.h" #include "DynamicLoaderDarwin.h" +#include "DynamicLoaderMacOSXDYLD.h" //#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN #ifdef ENABLE_DEBUG_PRINTF #include <stdio.h> -#define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__) +#define DEBUG_PRINTF(fmt, ...) printf(fmt, ##__VA_ARGS__) #else #define DEBUG_PRINTF(fmt, ...) #endif @@ -48,164 +48,140 @@ using namespace lldb; using namespace lldb_private; - //---------------------------------------------------------------------- // Create an instance of this class. This function is filled into // the plugin info class that gets handed out by the plugin factory and // allows the lldb to instantiate an instance of this class. //---------------------------------------------------------------------- -DynamicLoader * -DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force) -{ - bool create = force; - if (!create) - { - create = true; - Module* exe_module = process->GetTarget().GetExecutableModulePointer(); - if (exe_module) - { - ObjectFile *object_file = exe_module->GetObjectFile(); - if (object_file) - { - create = (object_file->GetStrata() == ObjectFile::eStrataUser); - } - } - - if (create) - { - const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); - switch (triple_ref.getOS()) - { - case llvm::Triple::Darwin: - case llvm::Triple::MacOSX: - case llvm::Triple::IOS: - case llvm::Triple::TvOS: - case llvm::Triple::WatchOS: - create = triple_ref.getVendor() == llvm::Triple::Apple; - break; - default: - create = false; - break; - } - } +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) - return new DynamicLoaderMacOSXDYLD (process); - return NULL; + + if (create) { + const llvm::Triple &triple_ref = + process->GetTarget().GetArchitecture().GetTriple(); + switch (triple_ref.getOS()) { + case llvm::Triple::Darwin: + case llvm::Triple::MacOSX: + case llvm::Triple::IOS: + case llvm::Triple::TvOS: + case llvm::Triple::WatchOS: + create = triple_ref.getVendor() == llvm::Triple::Apple; + break; + default: + create = false; + break; + } + } + } + + if (UseDYLDSPI(process) == true) { + create = false; + } + + if (create) + return new DynamicLoaderMacOSXDYLD(process); + return NULL; } //---------------------------------------------------------------------- // Constructor //---------------------------------------------------------------------- -DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : - DynamicLoaderDarwin(process), - m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), - m_dyld_all_image_infos(), - m_dyld_all_image_infos_stop_id (UINT32_MAX), - m_break_id(LLDB_INVALID_BREAK_ID), - m_mutex(), - m_process_image_addr_is_all_images_infos (false) -{ -} +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); +DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() { + if (LLDB_BREAK_ID_IS_VALID(m_break_id)) + m_process->GetTarget().RemoveBreakpointByID(m_break_id); } -bool -DynamicLoaderMacOSXDYLD::ProcessDidExec () -{ - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - bool did_exec = false; - if (m_process) - { - // If we are stopped after an exec, we will have only one thread... - if (m_process->GetThreadList().GetSize() == 1) - { - // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" - // value differs from the Process' image info address. When a process - // execs itself it might cause a change if ASLR is enabled. - const addr_t shlib_addr = m_process->GetImageInfoAddress (); - if (m_process_image_addr_is_all_images_infos == true && shlib_addr != m_dyld_all_image_infos_addr) - { - // The image info address from the process is the 'dyld_all_image_infos' - // address and it has changed. - did_exec = true; - } - else if (m_process_image_addr_is_all_images_infos == false && shlib_addr == m_dyld.address) - { - // The image info address from the process is the mach_header - // address for dyld and it has changed. +bool DynamicLoaderMacOSXDYLD::ProcessDidExec() { + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + bool did_exec = false; + if (m_process) { + // If we are stopped after an exec, we will have only one thread... + if (m_process->GetThreadList().GetSize() == 1) { + // We know if a process has exec'ed if our "m_dyld_all_image_infos_addr" + // value differs from the Process' image info address. When a process + // execs itself it might cause a change if ASLR is enabled. + const addr_t shlib_addr = m_process->GetImageInfoAddress(); + if (m_process_image_addr_is_all_images_infos == true && + shlib_addr != m_dyld_all_image_infos_addr) { + // The image info address from the process is the 'dyld_all_image_infos' + // address and it has changed. + did_exec = true; + } else if (m_process_image_addr_is_all_images_infos == false && + shlib_addr == m_dyld.address) { + // The image info address from the process is the mach_header + // address for dyld and it has changed. + did_exec = true; + } else { + // ASLR might be disabled and dyld could have ended up in the same + // location. We should try and detect if we are stopped at '_dyld_start' + ThreadSP thread_sp(m_process->GetThreadList().GetThreadAtIndex(0)); + if (thread_sp) { + lldb::StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); + if (frame_sp) { + const Symbol *symbol = + frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; + if (symbol) { + if (symbol->GetName() == ConstString("_dyld_start")) did_exec = true; } - else - { - // ASLR might be disabled and dyld could have ended up in the same - // location. We should try and detect if we are stopped at '_dyld_start' - ThreadSP thread_sp(m_process->GetThreadList().GetThreadAtIndex(0)); - if (thread_sp) - { - lldb::StackFrameSP frame_sp(thread_sp->GetStackFrameAtIndex(0)); - if (frame_sp) - { - const Symbol *symbol = frame_sp->GetSymbolContext(eSymbolContextSymbol).symbol; - if (symbol) - { - if (symbol->GetName() == ConstString("_dyld_start")) - did_exec = true; - } - } - } - } - - if (did_exec) - { - m_libpthread_module_wp.reset(); - m_pthread_getspecific_addr.Clear(); - } + } } + } + + if (did_exec) { + m_libpthread_module_wp.reset(); + m_pthread_getspecific_addr.Clear(); + } } - return did_exec; + } + return did_exec; } //---------------------------------------------------------------------- // Clear out the state of this class. //---------------------------------------------------------------------- -void -DynamicLoaderMacOSXDYLD::DoClear () -{ - std::lock_guard<std::recursive_mutex> guard(m_mutex); +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); + 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; + 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); +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); - } +void DynamicLoaderMacOSXDYLD::ClearNotificationBreakpoint() { + if (LLDB_BREAK_ID_IS_VALID(m_break_id)) { + m_process->GetTarget().RemoveBreakpointByID(m_break_id); + } } //---------------------------------------------------------------------- @@ -214,142 +190,127 @@ DynamicLoaderMacOSXDYLD::ClearNotificationBreakpoint () // to get the DYLD info (available on SnowLeopard only). If that fails, // then check in the default addresses. //---------------------------------------------------------------------- -void -DynamicLoaderMacOSXDYLD::DoInitialImageFetch() -{ - if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) - { - // Check the image info addr as it might point to the - // mach header for dyld, or it might point to the - // dyld_all_image_infos struct - const addr_t shlib_addr = m_process->GetImageInfoAddress (); - if (shlib_addr != LLDB_INVALID_ADDRESS) - { - ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); - uint8_t buf[4]; - DataExtractor data (buf, sizeof(buf), byte_order, 4); - Error error; - if (m_process->ReadMemory (shlib_addr, buf, 4, error) == 4) - { - lldb::offset_t offset = 0; - uint32_t magic = data.GetU32 (&offset); - switch (magic) - { - case llvm::MachO::MH_MAGIC: - case llvm::MachO::MH_MAGIC_64: - case llvm::MachO::MH_CIGAM: - case llvm::MachO::MH_CIGAM_64: - m_process_image_addr_is_all_images_infos = false; - ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); - return; - - default: - break; - } - } - // Maybe it points to the all image infos? - m_dyld_all_image_infos_addr = shlib_addr; - m_process_image_addr_is_all_images_infos = true; - } - } +void DynamicLoaderMacOSXDYLD::DoInitialImageFetch() { + if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) { + // Check the image info addr as it might point to the + // mach header for dyld, or it might point to the + // dyld_all_image_infos struct + const addr_t shlib_addr = m_process->GetImageInfoAddress(); + if (shlib_addr != LLDB_INVALID_ADDRESS) { + ByteOrder byte_order = + m_process->GetTarget().GetArchitecture().GetByteOrder(); + uint8_t buf[4]; + DataExtractor data(buf, sizeof(buf), byte_order, 4); + Error error; + if (m_process->ReadMemory(shlib_addr, buf, 4, error) == 4) { + lldb::offset_t offset = 0; + uint32_t magic = data.GetU32(&offset); + switch (magic) { + case llvm::MachO::MH_MAGIC: + case llvm::MachO::MH_MAGIC_64: + case llvm::MachO::MH_CIGAM: + case llvm::MachO::MH_CIGAM_64: + m_process_image_addr_is_all_images_infos = false; + ReadDYLDInfoFromMemoryAndSetNotificationCallback(shlib_addr); + return; - 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; + 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; } - - // Check some default values - Module *executable = m_process->GetTarget().GetExecutableModulePointer(); - - if (executable) - { - const ArchSpec &exe_arch = executable->GetArchitecture(); - if (exe_arch.GetAddressByteSize() == 8) - { - ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); - } - else if (exe_arch.GetMachine() == llvm::Triple::arm || exe_arch.GetMachine() == llvm::Triple::thumb || exe_arch.GetMachine() == llvm::Triple::aarch64) - { - ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); - } - else - { - ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); - } + } + + 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; } - return; + } + + // Check some default values + Module *executable = m_process->GetTarget().GetExecutableModulePointer(); + + if (executable) { + const ArchSpec &exe_arch = executable->GetArchitecture(); + if (exe_arch.GetAddressByteSize() == 8) { + ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); + } else if (exe_arch.GetMachine() == llvm::Triple::arm || + exe_arch.GetMachine() == llvm::Triple::thumb || + exe_arch.GetMachine() == llvm::Triple::aarch64) { + ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); + } else { + ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); + } + } + return; } //---------------------------------------------------------------------- // Assume that dyld is in memory at ADDR and try to parse it's load // commands //---------------------------------------------------------------------- -bool -DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) -{ - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - DataExtractor data; // Load command data - if (ReadMachHeader (addr, &m_dyld.header, &data)) - { - if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) - { - m_dyld.address = addr; - ModuleSP dyld_module_sp; - if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) - { - if (m_dyld.file_spec) - { - UpdateDYLDImageInfoFromNewImageInfo (m_dyld); - - } - } - dyld_module_sp = GetDYLDModule(); - - Target &target = m_process->GetTarget(); - - if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) - { - static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); - const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); - if (symbol) - m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target); - } - - // Update all image infos - InitializeFromAllImageInfos (); - - // If we didn't have an executable before, but now we do, then the - // dyld module shared pointer might be unique and we may need to add - // it again (since Target::SetExecutableModule() will clear the - // images). So append the dyld module back to the list if it is - /// unique! - if (dyld_module_sp) - { - target.GetImages().AppendIfNeeded (dyld_module_sp); - - // At this point we should have read in dyld's module, and so we should set breakpoints in it: - ModuleList modules; - modules.Append(dyld_module_sp); - target.ModulesDidLoad(modules); - SetDYLDModule (dyld_module_sp); - } - return true; +bool DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback( + lldb::addr_t addr) { + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + DataExtractor data; // Load command data + static ConstString g_dyld_all_image_infos("dyld_all_image_infos"); + if (ReadMachHeader(addr, &m_dyld.header, &data)) { + if (m_dyld.header.filetype == llvm::MachO::MH_DYLINKER) { + m_dyld.address = addr; + ModuleSP dyld_module_sp; + if (ParseLoadCommands(data, m_dyld, &m_dyld.file_spec)) { + if (m_dyld.file_spec) { + UpdateDYLDImageInfoFromNewImageInfo(m_dyld); } + } + dyld_module_sp = GetDYLDModule(); + + Target &target = m_process->GetTarget(); + + if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && + dyld_module_sp.get()) { + const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType( + g_dyld_all_image_infos, eSymbolTypeData); + if (symbol) + m_dyld_all_image_infos_addr = symbol->GetLoadAddress(&target); + } + + // Update all image infos + InitializeFromAllImageInfos(); + + // If we didn't have an executable before, but now we do, then the + // dyld module shared pointer might be unique and we may need to add + // it again (since Target::SetExecutableModule() will clear the + // images). So append the dyld module back to the list if it is + /// unique! + if (dyld_module_sp) { + target.GetImages().AppendIfNeeded(dyld_module_sp); + + // At this point we should have read in dyld's module, and so we should + // set breakpoints in it: + ModuleList modules; + modules.Append(dyld_module_sp); + target.ModulesDidLoad(modules); + SetDYLDModule(dyld_module_sp); + } + + return true; } - return false; + } + return false; } -bool -DynamicLoaderMacOSXDYLD::NeedToDoInitialImageFetch () -{ - return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; +bool DynamicLoaderMacOSXDYLD::NeedToDoInitialImageFetch() { + return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; } //---------------------------------------------------------------------- @@ -358,392 +319,397 @@ DynamicLoaderMacOSXDYLD::NeedToDoInitialImageFetch () // let our super class DynamicLoader class decide if we should stop // or not (based on global preference). //---------------------------------------------------------------------- -bool -DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, - StoppointCallbackContext *context, - lldb::user_id_t break_id, - lldb::user_id_t break_loc_id) -{ - // Let the event know that the images have changed - // DYLD passes three arguments to the notification breakpoint. - // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing - // Arg2: uint32_t infoCount - Number of shared libraries added - // Arg3: dyld_image_info info[] - Array of structs of the form: - // const struct mach_header *imageLoadAddress - // const char *imageFilePath - // uintptr_t imageFileModDate (a time_t) - - DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; - - // First step is to see if we've already initialized the all image infos. If we haven't then this function - // will do so and return true. In the course of initializing the all_image_infos it will read the complete - // current state, so we don't need to figure out what has changed from the data passed in to us. - - ExecutionContext exe_ctx (context->exe_ctx_ref); - Process *process = exe_ctx.GetProcessPtr(); - - // This is a sanity check just in case this dyld_instance is an old dyld plugin's breakpoint still lying around. - if (process != dyld_instance->m_process) - return false; - - if (dyld_instance->InitializeFromAllImageInfos()) - return dyld_instance->GetStopWhenImagesChange(); - - const lldb::ABISP &abi = process->GetABI(); - if (abi) - { - // Build up the value array to store the three arguments given above, then get the values from the ABI: - - ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); - ValueList argument_values; - Value input_value; - - CompilerType clang_void_ptr_type = clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); - CompilerType clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); - input_value.SetValueType (Value::eValueTypeScalar); - input_value.SetCompilerType (clang_uint32_type); -// input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); - argument_values.PushValue (input_value); - argument_values.PushValue (input_value); - input_value.SetCompilerType (clang_void_ptr_type); - // input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); - argument_values.PushValue (input_value); - - if (abi->GetArgumentValues (exe_ctx.GetThreadRef(), argument_values)) - { - uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); - if (dyld_mode != static_cast<uint32_t>(-1)) - { - // Okay the mode was right, now get the number of elements, and the array of new elements... - uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); - if (image_infos_count != static_cast<uint32_t>(-1)) - { - // Got the number added, now go through the array of added elements, putting out the mach header - // address, and adding the image. - // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do - // all the logging internally. - - lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); - if (dyld_mode == 0) - { - // This is add: - dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); - } - else - { - // This is remove: - dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); - } - - } - } +bool DynamicLoaderMacOSXDYLD::NotifyBreakpointHit( + void *baton, StoppointCallbackContext *context, lldb::user_id_t break_id, + lldb::user_id_t break_loc_id) { + // Let the event know that the images have changed + // DYLD passes three arguments to the notification breakpoint. + // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing + // Arg2: uint32_t infoCount - Number of shared libraries added + // Arg3: dyld_image_info info[] - Array of structs of the form: + // const struct mach_header + // *imageLoadAddress + // const char *imageFilePath + // uintptr_t imageFileModDate (a time_t) + + DynamicLoaderMacOSXDYLD *dyld_instance = (DynamicLoaderMacOSXDYLD *)baton; + + // First step is to see if we've already initialized the all image infos. If + // we haven't then this function + // will do so and return true. In the course of initializing the + // all_image_infos it will read the complete + // current state, so we don't need to figure out what has changed from the + // data passed in to us. + + ExecutionContext exe_ctx(context->exe_ctx_ref); + Process *process = exe_ctx.GetProcessPtr(); + + // This is a sanity check just in case this dyld_instance is an old dyld + // plugin's breakpoint still lying around. + if (process != dyld_instance->m_process) + return false; + + if (dyld_instance->InitializeFromAllImageInfos()) + return dyld_instance->GetStopWhenImagesChange(); + + const lldb::ABISP &abi = process->GetABI(); + if (abi) { + // Build up the value array to store the three arguments given above, then + // get the values from the ABI: + + ClangASTContext *clang_ast_context = + process->GetTarget().GetScratchClangASTContext(); + ValueList argument_values; + Value input_value; + + CompilerType clang_void_ptr_type = + clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType(); + CompilerType clang_uint32_type = + clang_ast_context->GetBuiltinTypeForEncodingAndBitSize( + lldb::eEncodingUint, 32); + input_value.SetValueType(Value::eValueTypeScalar); + input_value.SetCompilerType(clang_uint32_type); + // input_value.SetContext (Value::eContextTypeClangType, + // clang_uint32_type); + argument_values.PushValue(input_value); + argument_values.PushValue(input_value); + input_value.SetCompilerType(clang_void_ptr_type); + // input_value.SetContext (Value::eContextTypeClangType, + // clang_void_ptr_type); + argument_values.PushValue(input_value); + + if (abi->GetArgumentValues(exe_ctx.GetThreadRef(), argument_values)) { + uint32_t dyld_mode = + argument_values.GetValueAtIndex(0)->GetScalar().UInt(-1); + if (dyld_mode != static_cast<uint32_t>(-1)) { + // Okay the mode was right, now get the number of elements, and the + // array of new elements... + uint32_t image_infos_count = + argument_values.GetValueAtIndex(1)->GetScalar().UInt(-1); + if (image_infos_count != static_cast<uint32_t>(-1)) { + // Got the number added, now go through the array of added elements, + // putting out the mach header + // address, and adding the image. + // Note, I'm not putting in logging here, since the AddModules & + // RemoveModules functions do + // all the logging internally. + + lldb::addr_t image_infos_addr = + argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); + if (dyld_mode == 0) { + // This is add: + dyld_instance->AddModulesUsingImageInfosAddress(image_infos_addr, + image_infos_count); + } else { + // This is remove: + dyld_instance->RemoveModulesUsingImageInfosAddress( + image_infos_addr, image_infos_count); + } } + } } - else - { - process->GetTarget().GetDebugger().GetAsyncErrorStream()->Printf("No ABI plugin located for triple %s -- shared libraries will not be registered!\n", process->GetTarget().GetArchitecture().GetTriple().getTriple().c_str()); - } - - // Return true to stop the target, false to just let the target run - return dyld_instance->GetStopWhenImagesChange(); + } else { + process->GetTarget().GetDebugger().GetAsyncErrorStream()->Printf( + "No ABI plugin located for triple %s -- shared libraries will not be " + "registered!\n", + process->GetTarget().GetArchitecture().GetTriple().getTriple().c_str()); + } + + // Return true to stop the target, false to just let the target run + return dyld_instance->GetStopWhenImagesChange(); } -bool -DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () -{ - std::lock_guard<std::recursive_mutex> guard(m_mutex); +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; + // the all image infos is already valid for this process stop ID + if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) + return true; - m_dyld_all_image_infos.Clear(); - if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) - { - ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); - uint32_t addr_size = 4; - if (m_dyld_all_image_infos_addr > UINT32_MAX) - addr_size = 8; + 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; + uint8_t buf[256]; + DataExtractor data(buf, sizeof(buf), byte_order, addr_size); + lldb::offset_t offset = 0; - const size_t count_v2 = sizeof (uint32_t) + // version - sizeof (uint32_t) + // infoArrayCount - addr_size + // infoArray - addr_size + // notification - addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad - addr_size; // dyldImageLoadAddress - const size_t count_v11 = count_v2 + - addr_size + // jitInfo - addr_size + // dyldVersion - addr_size + // errorMessage - addr_size + // terminationFlags - addr_size + // coreSymbolicationShmPage - addr_size + // systemOrderFlag - addr_size + // uuidArrayCount - addr_size + // uuidArray - addr_size + // dyldAllImageInfosAddress - addr_size + // initialImageCount - addr_size + // errorKind - addr_size + // errorClientOfDylibPath - addr_size + // errorTargetDylibPath - addr_size; // errorSymbol - const size_t count_v13 = count_v11 + - addr_size + // sharedCacheSlide - sizeof (uuid_t); // sharedCacheUUID - UNUSED_IF_ASSERT_DISABLED(count_v13); - assert (sizeof (buf) >= count_v13); - - Error error; - if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) - { - m_dyld_all_image_infos.version = data.GetU32(&offset); - // If anything in the high byte is set, we probably got the byte - // order incorrect (the process might not have it set correctly - // yet due to attaching to a program without a specified file). - if (m_dyld_all_image_infos.version & 0xff000000) - { - // We have guessed the wrong byte order. Swap it and try - // reading the version again. - if (byte_order == eByteOrderLittle) - byte_order = eByteOrderBig; - else - byte_order = eByteOrderLittle; - - data.SetByteOrder (byte_order); - offset = 0; - m_dyld_all_image_infos.version = data.GetU32(&offset); - } - } + const size_t count_v2 = sizeof(uint32_t) + // version + sizeof(uint32_t) + // infoArrayCount + addr_size + // infoArray + addr_size + // notification + addr_size + // processDetachedFromSharedRegion + + // libSystemInitialized + pad + addr_size; // dyldImageLoadAddress + const size_t count_v11 = count_v2 + addr_size + // jitInfo + addr_size + // dyldVersion + addr_size + // errorMessage + addr_size + // terminationFlags + addr_size + // coreSymbolicationShmPage + addr_size + // systemOrderFlag + addr_size + // uuidArrayCount + addr_size + // uuidArray + addr_size + // dyldAllImageInfosAddress + addr_size + // initialImageCount + addr_size + // errorKind + addr_size + // errorClientOfDylibPath + addr_size + // errorTargetDylibPath + addr_size; // errorSymbol + const size_t count_v13 = count_v11 + addr_size + // sharedCacheSlide + sizeof(uuid_t); // sharedCacheUUID + UNUSED_IF_ASSERT_DISABLED(count_v13); + assert(sizeof(buf) >= count_v13); + + Error error; + if (m_process->ReadMemory(m_dyld_all_image_infos_addr, buf, 4, error) == + 4) { + m_dyld_all_image_infos.version = data.GetU32(&offset); + // If anything in the high byte is set, we probably got the byte + // order incorrect (the process might not have it set correctly + // yet due to attaching to a program without a specified file). + if (m_dyld_all_image_infos.version & 0xff000000) { + // We have guessed the wrong byte order. Swap it and try + // reading the version again. + if (byte_order == eByteOrderLittle) + byte_order = eByteOrderBig; else - { - return false; - } + byte_order = eByteOrderLittle; + + data.SetByteOrder(byte_order); + offset = 0; + m_dyld_all_image_infos.version = data.GetU32(&offset); + } + } else { + return false; + } - const size_t count = (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; - - const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); - if (bytes_read == count) - { - offset = 0; - m_dyld_all_image_infos.version = data.GetU32(&offset); - m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); - m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); - m_dyld_all_image_infos.notification = data.GetPointer(&offset); - m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); - m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); - // Adjust for padding. - offset += addr_size - 2; - m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); - if (m_dyld_all_image_infos.version >= 11) - { - offset += addr_size * 8; - uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); - - // When we started, we were given the actual address of the all_image_infos - // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in - // m_dyld_all_image_infos_addr and is the most accurate address we have. - - // We read the dyld_all_image_infos struct from memory; it contains its own address. - // If the address in the struct does not match the actual address, - // the dyld we're looking at has been loaded at a different location (slid) from - // where it intended to load. The addresses in the dyld_all_image_infos struct - // are the original, non-slid addresses, and need to be adjusted. Most importantly - // the address of dyld and the notification address need to be adjusted. - - if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) - { - uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; - uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; - m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; - m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; - } - } - m_dyld_all_image_infos_stop_id = m_process->GetStopID(); - return true; + const size_t count = + (m_dyld_all_image_infos.version >= 11) ? count_v11 : count_v2; + + const size_t bytes_read = + m_process->ReadMemory(m_dyld_all_image_infos_addr, buf, count, error); + if (bytes_read == count) { + offset = 0; + m_dyld_all_image_infos.version = data.GetU32(&offset); + m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); + m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); + m_dyld_all_image_infos.notification = data.GetPointer(&offset); + m_dyld_all_image_infos.processDetachedFromSharedRegion = + data.GetU8(&offset); + m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); + // Adjust for padding. + offset += addr_size - 2; + m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); + if (m_dyld_all_image_infos.version >= 11) { + offset += addr_size * 8; + uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); + + // When we started, we were given the actual address of the + // all_image_infos + // struct (probably via TASK_DYLD_INFO) in memory - this address is + // stored in + // m_dyld_all_image_infos_addr and is the most accurate address we have. + + // We read the dyld_all_image_infos struct from memory; it contains its + // own address. + // If the address in the struct does not match the actual address, + // the dyld we're looking at has been loaded at a different location + // (slid) from + // where it intended to load. The addresses in the dyld_all_image_infos + // struct + // are the original, non-slid addresses, and need to be adjusted. Most + // importantly + // the address of dyld and the notification address need to be adjusted. + + if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) { + uint64_t image_infos_offset = + dyld_all_image_infos_addr - + m_dyld_all_image_infos.dyldImageLoadAddress; + uint64_t notification_offset = + m_dyld_all_image_infos.notification - + m_dyld_all_image_infos.dyldImageLoadAddress; + m_dyld_all_image_infos.dyldImageLoadAddress = + m_dyld_all_image_infos_addr - image_infos_offset; + m_dyld_all_image_infos.notification = + m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; } + } + m_dyld_all_image_infos_stop_id = m_process->GetStopID(); + return true; } - return false; + } + return false; } +bool DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress( + lldb::addr_t image_infos_addr, uint32_t image_infos_count) { + ImageInfo::collection image_infos; + Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); + if (log) + log->Printf("Adding %d modules.\n", image_infos_count); -bool -DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) -{ - ImageInfo::collection image_infos; - Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); - if (log) - log->Printf ("Adding %d modules.\n", image_infos_count); - - std::lock_guard<std::recursive_mutex> guard(m_mutex); - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - if (m_process->GetStopID() == m_dyld_image_infos_stop_id) - return true; + std::lock_guard<std::recursive_mutex> guard(m_mutex); + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + if (m_process->GetStopID() == m_dyld_image_infos_stop_id) + return true; - StructuredData::ObjectSP image_infos_json_sp = m_process->GetLoadedDynamicLibrariesInfos (image_infos_addr, image_infos_count); - if (image_infos_json_sp.get() - && image_infos_json_sp->GetAsDictionary() - && image_infos_json_sp->GetAsDictionary()->HasKey("images") - && image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray() - && image_infos_json_sp->GetAsDictionary()->GetValueForKey("images")->GetAsArray()->GetSize() == image_infos_count) - { - bool return_value = false; - if (JSONImageInformationIntoImageInfo (image_infos_json_sp, image_infos)) - { - AddExecutableModuleIfInImageInfos (image_infos); - return_value = AddModulesUsingImageInfos (image_infos); - } - m_dyld_image_infos_stop_id = m_process->GetStopID(); - return return_value; + StructuredData::ObjectSP image_infos_json_sp = + m_process->GetLoadedDynamicLibrariesInfos(image_infos_addr, + image_infos_count); + if (image_infos_json_sp.get() && image_infos_json_sp->GetAsDictionary() && + image_infos_json_sp->GetAsDictionary()->HasKey("images") && + image_infos_json_sp->GetAsDictionary() + ->GetValueForKey("images") + ->GetAsArray() && + image_infos_json_sp->GetAsDictionary() + ->GetValueForKey("images") + ->GetAsArray() + ->GetSize() == image_infos_count) { + bool return_value = false; + if (JSONImageInformationIntoImageInfo(image_infos_json_sp, image_infos)) { + UpdateSpecialBinariesFromNewImageInfos(image_infos); + return_value = AddModulesUsingImageInfos(image_infos); } - - 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; + } + + if (!ReadImageInfos(image_infos_addr, image_infos_count, image_infos)) + return false; + + UpdateImageInfosHeaderAndLoadCommands(image_infos, image_infos_count, false); + bool return_value = AddModulesUsingImageInfos(image_infos); + m_dyld_image_infos_stop_id = m_process->GetStopID(); + return return_value; } -bool -DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) -{ - ImageInfo::collection image_infos; - Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); - - std::lock_guard<std::recursive_mutex> guard(m_mutex); - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - if (m_process->GetStopID() == m_dyld_image_infos_stop_id) - return true; +bool DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress( + lldb::addr_t image_infos_addr, uint32_t image_infos_count) { + ImageInfo::collection image_infos; + Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - // 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; - } - + 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->Printf ("Removing %d modules.", image_infos_count); - - ModuleList unloaded_module_list; - for (uint32_t idx = 0; idx < image_infos.size(); ++idx) - { - if (log) - { - log->Printf ("Removing module at address=0x%16.16" PRIx64 ".", image_infos[idx].address); - image_infos[idx].PutToLog (log); - } - - // Remove this image_infos from the m_all_image_infos. We do the comparison by address - // rather than by file spec because we can have many modules with the same "file spec" in the - // case that they are modules loaded from memory. - // - // Also copy over the uuid from the old entry to the removed entry so we can - // use it to lookup the module in the module list. - - ImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); - for (pos = m_dyld_image_infos.begin(); pos != end; pos++) - { - if (image_infos[idx].address == (*pos).address) - { - image_infos[idx].uuid = (*pos).uuid; - - // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at - // one go later on. - - ModuleSP unload_image_module_sp (FindTargetModuleForImageInfo (image_infos[idx], false, NULL)); - if (unload_image_module_sp.get()) - { - // When we unload, be sure to use the image info from the old list, - // since that has sections correctly filled in. - UnloadModuleSections (unload_image_module_sp.get(), *pos); - unloaded_module_list.AppendIfNeeded (unload_image_module_sp); - } - else - { - if (log) - { - log->Printf ("Could not find module for unloading info entry:"); - image_infos[idx].PutToLog(log); - } - } - - // Then remove it from the m_dyld_image_infos: - - m_dyld_image_infos.erase(pos); - break; - } - } - - if (pos == end) - { - if (log) - { - log->Printf ("Could not find image_info entry for unloading image:"); - image_infos[idx].PutToLog(log); - } - } + log->PutCString("Failed reading image infos array."); + return false; + } + + if (log) + log->Printf("Removing %d modules.", image_infos_count); + + ModuleList unloaded_module_list; + for (uint32_t idx = 0; idx < image_infos.size(); ++idx) { + if (log) { + log->Printf("Removing module at address=0x%16.16" PRIx64 ".", + image_infos[idx].address); + image_infos[idx].PutToLog(log); } - if (unloaded_module_list.GetSize() > 0) - { - if (log) - { - log->PutCString("Unloaded:"); - unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); + + // Remove this image_infos from the m_all_image_infos. We do the comparison + // by address + // rather than by file spec because we can have many modules with the same + // "file spec" in the + // case that they are modules loaded from memory. + // + // Also copy over the uuid from the old entry to the removed entry so we can + // use it to lookup the module in the module list. + + ImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); + for (pos = m_dyld_image_infos.begin(); pos != end; pos++) { + if (image_infos[idx].address == (*pos).address) { + image_infos[idx].uuid = (*pos).uuid; + + // Add the module from this image_info to the "unloaded_module_list". + // We'll remove them all at + // one go later on. + + ModuleSP unload_image_module_sp( + FindTargetModuleForImageInfo(image_infos[idx], false, NULL)); + if (unload_image_module_sp.get()) { + // When we unload, be sure to use the image info from the old list, + // since that has sections correctly filled in. + UnloadModuleSections(unload_image_module_sp.get(), *pos); + unloaded_module_list.AppendIfNeeded(unload_image_module_sp); + } else { + if (log) { + log->Printf("Could not find module for unloading info entry:"); + image_infos[idx].PutToLog(log); + } } - m_process->GetTarget().GetImages().Remove (unloaded_module_list); + + // Then remove it from the m_dyld_image_infos: + + m_dyld_image_infos.erase(pos); + break; + } } - m_dyld_image_infos_stop_id = m_process->GetStopID(); - return true; -} -bool -DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, - uint32_t image_infos_count, - ImageInfo::collection &image_infos) -{ - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - const ByteOrder endian = GetByteOrderFromMagic (m_dyld.header.magic); - const uint32_t addr_size = m_dyld.GetAddressByteSize(); - - image_infos.resize(image_infos_count); - const size_t count = image_infos.size() * 3 * addr_size; - DataBufferHeap info_data(count, 0); - Error error; - const size_t bytes_read = m_process->ReadMemory (image_infos_addr, - info_data.GetBytes(), - info_data.GetByteSize(), - error); - if (bytes_read == count) - { - lldb::offset_t info_data_offset = 0; - DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); - for (size_t i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) - { - image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); - lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); - image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); - - char raw_path[PATH_MAX]; - m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path), error); - // don't resolve the path - if (error.Success()) - { - const bool resolve_path = false; - image_infos[i].file_spec.SetFile(raw_path, resolve_path); - } - } - return true; + if (pos == end) { + if (log) { + log->Printf("Could not find image_info entry for unloading image:"); + image_infos[idx].PutToLog(log); + } } - else - { - return false; + } + if (unloaded_module_list.GetSize() > 0) { + if (log) { + log->PutCString("Unloaded:"); + unloaded_module_list.LogUUIDAndPaths( + log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); + } + m_process->GetTarget().GetImages().Remove(unloaded_module_list); + } + m_dyld_image_infos_stop_id = m_process->GetStopID(); + return true; +} + +bool DynamicLoaderMacOSXDYLD::ReadImageInfos( + lldb::addr_t image_infos_addr, uint32_t image_infos_count, + ImageInfo::collection &image_infos) { + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + const ByteOrder endian = GetByteOrderFromMagic(m_dyld.header.magic); + const uint32_t addr_size = m_dyld.GetAddressByteSize(); + + image_infos.resize(image_infos_count); + const size_t count = image_infos.size() * 3 * addr_size; + DataBufferHeap info_data(count, 0); + Error error; + const size_t bytes_read = m_process->ReadMemory( + image_infos_addr, info_data.GetBytes(), info_data.GetByteSize(), error); + if (bytes_read == count) { + lldb::offset_t info_data_offset = 0; + DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), + endian, addr_size); + for (size_t i = 0; + i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); + i++) { + image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); + lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); + image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); + + char raw_path[PATH_MAX]; + m_process->ReadCStringFromMemory(path_addr, raw_path, sizeof(raw_path), + error); + // don't resolve the path + if (error.Success()) { + const bool resolve_path = false; + image_infos[i].file_spec.SetFile(raw_path, resolve_path); + } } + return true; + } else { + return false; + } } //---------------------------------------------------------------------- @@ -753,74 +719,68 @@ DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, // we're reading the dyld infos. Return true if we actually read anything, // and false otherwise. //---------------------------------------------------------------------- -bool -DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () -{ - Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); - - std::lock_guard<std::recursive_mutex> guard(m_mutex); - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - if (m_process->GetStopID() == m_dyld_image_infos_stop_id - || m_dyld_image_infos.size() != 0) - return false; - - if (ReadAllImageInfosStructure ()) - { - // Nothing to load or unload? - if (m_dyld_all_image_infos.dylib_info_count == 0) - return true; - - if (m_dyld_all_image_infos.dylib_info_addr == 0) - { - // DYLD is updating the images now. So we should say we have no images, and then we'll - // figure it out when we hit the added breakpoint. - return false; - } - else - { - if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, - m_dyld_all_image_infos.dylib_info_count)) - { - DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); - m_dyld_image_infos.clear(); - } - } +bool DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos() { + Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER)); - // Now we have one more bit of business. If there is a library left in the images for our target that - // doesn't have a load address, then it must be something that we were expecting to load (for instance we - // read a load command for it) but it didn't in fact load - probably because DYLD_*_PATH pointed - // to an equivalent version. We don't want it to stay in the target's module list or it will confuse - // us, so unload it here. - Target &target = m_process->GetTarget(); - const ModuleList &target_modules = target.GetImages(); - ModuleList not_loaded_modules; - std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); - - size_t num_modules = target_modules.GetSize(); - for (size_t i = 0; i < num_modules; i++) - { - ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked (i); - if (!module_sp->IsLoadedInTarget (&target)) - { - if (log) - { - StreamString s; - module_sp->GetDescription (&s); - log->Printf ("Unloading pre-run module: %s.", s.GetData ()); - } - not_loaded_modules.Append (module_sp); - } - } - - if (not_loaded_modules.GetSize() != 0) - { - target.GetImages().Remove(not_loaded_modules); + std::lock_guard<std::recursive_mutex> guard(m_mutex); + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + if (m_process->GetStopID() == m_dyld_image_infos_stop_id || + m_dyld_image_infos.size() != 0) + return false; + + if (ReadAllImageInfosStructure()) { + // Nothing to load or unload? + if (m_dyld_all_image_infos.dylib_info_count == 0) + return true; + + if (m_dyld_all_image_infos.dylib_info_addr == 0) { + // DYLD is updating the images now. So we should say we have no images, + // and then we'll + // figure it out when we hit the added breakpoint. + return false; + } else { + if (!AddModulesUsingImageInfosAddress( + m_dyld_all_image_infos.dylib_info_addr, + m_dyld_all_image_infos.dylib_info_count)) { + DEBUG_PRINTF("%s", "unable to read all data for all_dylib_infos."); + m_dyld_image_infos.clear(); + } + } + + // Now we have one more bit of business. If there is a library left in the + // images for our target that + // doesn't have a load address, then it must be something that we were + // expecting to load (for instance we + // read a load command for it) but it didn't in fact load - probably because + // DYLD_*_PATH pointed + // to an equivalent version. We don't want it to stay in the target's + // module list or it will confuse + // us, so unload it here. + Target &target = m_process->GetTarget(); + const ModuleList &target_modules = target.GetImages(); + ModuleList not_loaded_modules; + std::lock_guard<std::recursive_mutex> guard(target_modules.GetMutex()); + + size_t num_modules = target_modules.GetSize(); + for (size_t i = 0; i < num_modules; i++) { + ModuleSP module_sp = target_modules.GetModuleAtIndexUnlocked(i); + if (!module_sp->IsLoadedInTarget(&target)) { + if (log) { + StreamString s; + module_sp->GetDescription(&s); + log->Printf("Unloading pre-run module: %s.", s.GetData()); } + not_loaded_modules.Append(module_sp); + } + } - return true; + if (not_loaded_modules.GetSize() != 0) { + target.GetImages().Remove(not_loaded_modules); } - else - return false; + + return true; + } else + return false; } //---------------------------------------------------------------------- @@ -829,166 +789,161 @@ DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () // // Returns true if we succeed, false if we fail for any reason. //---------------------------------------------------------------------- -bool -DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) -{ - DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); - Error error; - size_t bytes_read = m_process->ReadMemory (addr, - header_bytes.GetBytes(), - header_bytes.GetByteSize(), - error); - if (bytes_read == sizeof(llvm::MachO::mach_header)) - { - lldb::offset_t offset = 0; - ::memset (header, 0, sizeof(llvm::MachO::mach_header)); - - // Get the magic byte unswapped so we can figure out what we are dealing with - DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), endian::InlHostByteOrder(), 4); - header->magic = data.GetU32(&offset); - lldb::addr_t load_cmd_addr = addr; - data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); - switch (header->magic) - { - case llvm::MachO::MH_MAGIC: - case llvm::MachO::MH_CIGAM: - data.SetAddressByteSize(4); - load_cmd_addr += sizeof(llvm::MachO::mach_header); - break; - - case llvm::MachO::MH_MAGIC_64: - case llvm::MachO::MH_CIGAM_64: - data.SetAddressByteSize(8); - load_cmd_addr += sizeof(llvm::MachO::mach_header_64); - break; - - default: - return false; - } - - // Read the rest of dyld's mach header - if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) - { - if (load_command_data == NULL) - return true; // We were able to read the mach_header and weren't asked to read the load command bytes - - DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); - - size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, - load_cmd_data_sp->GetBytes(), - load_cmd_data_sp->GetByteSize(), - error); - - if (load_cmd_bytes_read == header->sizeofcmds) - { - // Set the load command data and also set the correct endian - // swap settings and the correct address size - load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); - load_command_data->SetByteOrder(data.GetByteOrder()); - load_command_data->SetAddressByteSize(data.GetAddressByteSize()); - return true; // We successfully read the mach_header and the load command data - } +bool DynamicLoaderMacOSXDYLD::ReadMachHeader(lldb::addr_t addr, + llvm::MachO::mach_header *header, + DataExtractor *load_command_data) { + DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); + Error error; + size_t bytes_read = m_process->ReadMemory(addr, header_bytes.GetBytes(), + header_bytes.GetByteSize(), error); + if (bytes_read == sizeof(llvm::MachO::mach_header)) { + lldb::offset_t offset = 0; + ::memset(header, 0, sizeof(llvm::MachO::mach_header)); + + // Get the magic byte unswapped so we can figure out what we are dealing + // with + DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), + endian::InlHostByteOrder(), 4); + header->magic = data.GetU32(&offset); + lldb::addr_t load_cmd_addr = addr; + data.SetByteOrder( + DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); + switch (header->magic) { + case llvm::MachO::MH_MAGIC: + case llvm::MachO::MH_CIGAM: + data.SetAddressByteSize(4); + load_cmd_addr += sizeof(llvm::MachO::mach_header); + break; + + case llvm::MachO::MH_MAGIC_64: + case llvm::MachO::MH_CIGAM_64: + data.SetAddressByteSize(8); + load_cmd_addr += sizeof(llvm::MachO::mach_header_64); + break; + + default: + return false; + } - return false; // We weren't able to read the load command data - } + // 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 + } + return false; // We failed the read the mach_header } - //---------------------------------------------------------------------- // Parse the load commands for an image //---------------------------------------------------------------------- -uint32_t -DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, ImageInfo& dylib_info, FileSpec *lc_id_dylinker) -{ - lldb::offset_t offset = 0; - uint32_t cmd_idx; - Segment segment; - dylib_info.Clear (true); - - for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) - { - // Clear out any load command specific data from DYLIB_INFO since - // we are about to read it. - - if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) - { - llvm::MachO::load_command load_cmd; - lldb::offset_t load_cmd_offset = offset; - load_cmd.cmd = data.GetU32 (&offset); - load_cmd.cmdsize = data.GetU32 (&offset); - switch (load_cmd.cmd) - { - case llvm::MachO::LC_SEGMENT: - { - segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); - // We are putting 4 uint32_t values 4 uint64_t values so - // we have to use multiple 32 bit gets below. - segment.vmaddr = data.GetU32 (&offset); - segment.vmsize = data.GetU32 (&offset); - segment.fileoff = data.GetU32 (&offset); - segment.filesize = data.GetU32 (&offset); - // Extract maxprot, initprot, nsects and flags all at once - data.GetU32(&offset, &segment.maxprot, 4); - dylib_info.segments.push_back (segment); - } - break; - - case llvm::MachO::LC_SEGMENT_64: - { - segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); - // Extract vmaddr, vmsize, fileoff, and filesize all at once - data.GetU64(&offset, &segment.vmaddr, 4); - // Extract maxprot, initprot, nsects and flags all at once - data.GetU32(&offset, &segment.maxprot, 4); - dylib_info.segments.push_back (segment); - } - break; - - case llvm::MachO::LC_ID_DYLINKER: - if (lc_id_dylinker) - { - const lldb::offset_t name_offset = load_cmd_offset + data.GetU32 (&offset); - const char *path = data.PeekCStr (name_offset); - lc_id_dylinker->SetFile (path, true); - } - break; - - case llvm::MachO::LC_UUID: - dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); - break; - - default: - break; - } - // Set offset to be the beginning of the next load command. - offset = load_cmd_offset + load_cmd.cmdsize; +uint32_t DynamicLoaderMacOSXDYLD::ParseLoadCommands(const DataExtractor &data, + ImageInfo &dylib_info, + FileSpec *lc_id_dylinker) { + lldb::offset_t offset = 0; + uint32_t cmd_idx; + Segment segment; + dylib_info.Clear(true); + + for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) { + // Clear out any load command specific data from DYLIB_INFO since + // we are about to read it. + + if (data.ValidOffsetForDataOfSize(offset, + sizeof(llvm::MachO::load_command))) { + llvm::MachO::load_command load_cmd; + lldb::offset_t load_cmd_offset = offset; + load_cmd.cmd = data.GetU32(&offset); + load_cmd.cmdsize = data.GetU32(&offset); + switch (load_cmd.cmd) { + case llvm::MachO::LC_SEGMENT: { + segment.name.SetTrimmedCStringWithLength( + (const char *)data.GetData(&offset, 16), 16); + // We are putting 4 uint32_t values 4 uint64_t values so + // we have to use multiple 32 bit gets below. + segment.vmaddr = data.GetU32(&offset); + segment.vmsize = data.GetU32(&offset); + segment.fileoff = data.GetU32(&offset); + segment.filesize = data.GetU32(&offset); + // Extract maxprot, initprot, nsects and flags all at once + data.GetU32(&offset, &segment.maxprot, 4); + dylib_info.segments.push_back(segment); + } break; + + case llvm::MachO::LC_SEGMENT_64: { + segment.name.SetTrimmedCStringWithLength( + (const char *)data.GetData(&offset, 16), 16); + // Extract vmaddr, vmsize, fileoff, and filesize all at once + data.GetU64(&offset, &segment.vmaddr, 4); + // Extract maxprot, initprot, nsects and flags all at once + data.GetU32(&offset, &segment.maxprot, 4); + dylib_info.segments.push_back(segment); + } break; + + case llvm::MachO::LC_ID_DYLINKER: + if (lc_id_dylinker) { + const lldb::offset_t name_offset = + load_cmd_offset + data.GetU32(&offset); + const char *path = data.PeekCStr(name_offset); + lc_id_dylinker->SetFile(path, true); } + break; + + case llvm::MachO::LC_UUID: + dylib_info.uuid.SetBytes(data.GetData(&offset, 16)); + break; + + default: + break; + } + // Set offset to be the beginning of the next load command. + offset = load_cmd_offset + load_cmd.cmdsize; } - - // All sections listed in the dyld image info structure will all - // either be fixed up already, or they will all be off by a single - // slide amount that is determined by finding the first segment - // that is at file offset zero which also has bytes (a file size - // that is greater than zero) in the object file. - - // Determine the slide amount (if any) - const size_t num_sections = dylib_info.segments.size(); - for (size_t i = 0; i < num_sections; ++i) - { - // Iterate through the object file sections to find the - // first section that starts of file offset zero and that - // has bytes in the file... - if ((dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) || (dylib_info.segments[i].name == ConstString("__TEXT"))) - { - dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; - // We have found the slide amount, so we can exit - // this for loop. - break; - } + } + + // All sections listed in the dyld image info structure will all + // either be fixed up already, or they will all be off by a single + // slide amount that is determined by finding the first segment + // that is at file offset zero which also has bytes (a file size + // that is greater than zero) in the object file. + + // Determine the slide amount (if any) + const size_t num_sections = dylib_info.segments.size(); + for (size_t i = 0; i < num_sections; ++i) { + // Iterate through the object file sections to find the + // first section that starts of file offset zero and that + // has bytes in the file... + if ((dylib_info.segments[i].fileoff == 0 && + dylib_info.segments[i].filesize > 0) || + (dylib_info.segments[i].name == ConstString("__TEXT"))) { + dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; + // We have found the slide amount, so we can exit + // this for loop. + break; } - return cmd_idx; + } + return cmd_idx; } //---------------------------------------------------------------------- @@ -996,240 +951,278 @@ DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, ImageInfo // _dyld_all_image_infos structure points to and cache the results. //---------------------------------------------------------------------- -void -DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(ImageInfo::collection &image_infos, - uint32_t infos_count, - bool update_executable) -{ - uint32_t exe_idx = UINT32_MAX; - // Read any UUID values that we can get - for (uint32_t i = 0; i < infos_count; i++) - { - if (!image_infos[i].UUIDValid()) - { - DataExtractor data; // Load command data - if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) - continue; - - ParseLoadCommands (data, image_infos[i], NULL); - - if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) - exe_idx = i; - - } +void DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands( + ImageInfo::collection &image_infos, uint32_t infos_count, + bool update_executable) { + uint32_t exe_idx = UINT32_MAX; + // Read any UUID values that we can get + for (uint32_t i = 0; i < infos_count; i++) { + if (!image_infos[i].UUIDValid()) { + DataExtractor data; // Load command data + if (!ReadMachHeader(image_infos[i].address, &image_infos[i].header, + &data)) + continue; + + ParseLoadCommands(data, image_infos[i], NULL); + + if (image_infos[i].header.filetype == llvm::MachO::MH_EXECUTE) + exe_idx = i; } - - Target &target = m_process->GetTarget(); - - if (exe_idx < image_infos.size()) - { - const bool can_create = true; - ModuleSP exe_module_sp (FindTargetModuleForImageInfo (image_infos[exe_idx], can_create, NULL)); - - if (exe_module_sp) - { - UpdateImageLoadAddress (exe_module_sp.get(), image_infos[exe_idx]); - - if (exe_module_sp.get() != target.GetExecutableModulePointer()) - { - // Don't load dependent images since we are in dyld where we will know - // and find out about all images that are loaded. Also when setting the - // executable module, it will clear the targets module list, and if we - // have an in memory dyld module, it will get removed from the list - // so we will need to add it back after setting the executable module, - // so we first try and see if we already have a weak pointer to the - // dyld module, make it into a shared pointer, then add the executable, - // then re-add it back to make sure it is always in the list. - ModuleSP dyld_module_sp(GetDYLDModule ()); - - const bool get_dependent_images = false; - m_process->GetTarget().SetExecutableModule (exe_module_sp, - get_dependent_images); - - if (dyld_module_sp) - { - if(target.GetImages().AppendIfNeeded (dyld_module_sp)) - { - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - - // Also add it to the section list. - UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); - } - } - } + } + + Target &target = m_process->GetTarget(); + + if (exe_idx < image_infos.size()) { + const bool can_create = true; + ModuleSP exe_module_sp( + FindTargetModuleForImageInfo(image_infos[exe_idx], can_create, NULL)); + + if (exe_module_sp) { + UpdateImageLoadAddress(exe_module_sp.get(), image_infos[exe_idx]); + + if (exe_module_sp.get() != target.GetExecutableModulePointer()) { + // Don't load dependent images since we are in dyld where we will know + // and find out about all images that are loaded. Also when setting the + // executable module, it will clear the targets module list, and if we + // have an in memory dyld module, it will get removed from the list + // so we will need to add it back after setting the executable module, + // so we first try and see if we already have a weak pointer to the + // dyld module, make it into a shared pointer, then add the executable, + // then re-add it back to make sure it is always in the list. + ModuleSP dyld_module_sp(GetDYLDModule()); + + const bool get_dependent_images = false; + m_process->GetTarget().SetExecutableModule(exe_module_sp, + get_dependent_images); + + if (dyld_module_sp) { + if (target.GetImages().AppendIfNeeded(dyld_module_sp)) { + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + + // Also add it to the section list. + UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); + } } + } } + } } - //---------------------------------------------------------------------- // Dump the _dyld_all_image_infos members and all current image infos // that we have parsed to the file handle provided. //---------------------------------------------------------------------- -void -DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const -{ - if (log == NULL) - return; - - std::lock_guard<std::recursive_mutex> guard(m_mutex); - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 ", notify=0x%8.8" PRIx64 " }", - m_dyld_all_image_infos.version, - m_dyld_all_image_infos.dylib_info_count, - (uint64_t)m_dyld_all_image_infos.dylib_info_addr, - (uint64_t)m_dyld_all_image_infos.notification); - size_t i; - const size_t count = m_dyld_image_infos.size(); - if (count > 0) - { - log->PutCString("Loaded:"); - for (i = 0; i<count; i++) - m_dyld_image_infos[i].PutToLog(log); - } -} +void DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const { + if (log == NULL) + return; -bool -DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () -{ - DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); - if (m_break_id == LLDB_INVALID_BREAK_ID) - { - if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) - { - Address so_addr; - // Set the notification breakpoint and install a breakpoint - // callback function that will get called each time the - // breakpoint gets hit. We will use this to track when shared - // libraries get loaded/unloaded. - bool resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); - if (!resolved) - { - ModuleSP dyld_module_sp = m_dyld_module_wp.lock(); - if (dyld_module_sp) - { - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); - - UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); - resolved = m_process->GetTarget().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr); - } - } + std::lock_guard<std::recursive_mutex> guard(m_mutex); + std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); + log->Printf( + "dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8" PRIx64 + ", notify=0x%8.8" PRIx64 " }", + m_dyld_all_image_infos.version, m_dyld_all_image_infos.dylib_info_count, + (uint64_t)m_dyld_all_image_infos.dylib_info_addr, + (uint64_t)m_dyld_all_image_infos.notification); + size_t i; + const size_t count = m_dyld_image_infos.size(); + if (count > 0) { + log->PutCString("Loaded:"); + for (i = 0; i < count; i++) + m_dyld_image_infos[i].PutToLog(log); + } +} - 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(); - } +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; + } + return m_break_id != LLDB_INVALID_BREAK_ID; } -Error -DynamicLoaderMacOSXDYLD::CanLoadImage () -{ - Error error; - // In order for us to tell if we can load a shared library we verify that - // the dylib_info_addr isn't zero (which means no shared libraries have - // been set yet, or dyld is currently mucking with the shared library list). - if (ReadAllImageInfosStructure ()) - { - // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? - // TODO: check the malloc lock? - // TODO: check the objective C lock? - if (m_dyld_all_image_infos.dylib_info_addr != 0) - return error; // Success - } - - error.SetErrorString("unsafe to load or unload shared libraries"); - return error; +Error DynamicLoaderMacOSXDYLD::CanLoadImage() { + Error error; + // In order for us to tell if we can load a shared library we verify that + // the dylib_info_addr isn't zero (which means no shared libraries have + // been set yet, or dyld is currently mucking with the shared library list). + if (ReadAllImageInfosStructure()) { + // TODO: also check the _dyld_global_lock_held variable in + // libSystem.B.dylib? + // TODO: check the malloc lock? + // TODO: check the objective C lock? + if (m_dyld_all_image_infos.dylib_info_addr != 0) + return error; // Success + } + + error.SetErrorString("unsafe to load or unload shared libraries"); + return error; } -void -DynamicLoaderMacOSXDYLD::Initialize() -{ - PluginManager::RegisterPlugin (GetPluginNameStatic(), - GetPluginDescriptionStatic(), - CreateInstance); -} +bool DynamicLoaderMacOSXDYLD::GetSharedCacheInformation( + lldb::addr_t &base_address, UUID &uuid, LazyBool &using_shared_cache, + LazyBool &private_shared_cache) { + base_address = LLDB_INVALID_ADDRESS; + uuid.Clear(); + using_shared_cache = eLazyBoolCalculate; + private_shared_cache = eLazyBoolCalculate; + + if (m_process) { + addr_t all_image_infos = m_process->GetImageInfoAddress(); + + // The address returned by GetImageInfoAddress may be the address of dyld + // (don't want) + // or it may be the address of the dyld_all_image_infos structure (want). + // The first four + // bytes will be either the version field (all_image_infos) or a Mach-O file + // magic constant. + // Version 13 and higher of dyld_all_image_infos is required to get the + // sharedCacheUUID field. + + Error 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.SetBytes(shared_cache_uuid); + 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; + Error error; + base_address = m_process->ReadUnsignedIntegerFromMemory( + sharedCacheBaseAddr_address, wordsize, LLDB_INVALID_ADDRESS, + error); + if (error.Fail()) + base_address = LLDB_INVALID_ADDRESS; + } -void -DynamicLoaderMacOSXDYLD::Terminate() -{ - PluginManager::UnregisterPlugin (CreateInstance); + return true; + } + + // + // add + // NB: sharedCacheBaseAddress is the next field in dyld_all_image_infos + // after + // sharedCacheUUID -- that is, 16 bytes after it, if we wanted to fetch + // it. + } + } + return false; } +void DynamicLoaderMacOSXDYLD::Initialize() { + PluginManager::RegisterPlugin(GetPluginNameStatic(), + GetPluginDescriptionStatic(), CreateInstance); +} -lldb_private::ConstString -DynamicLoaderMacOSXDYLD::GetPluginNameStatic() -{ - static ConstString g_name("macosx-dyld"); - return g_name; +void DynamicLoaderMacOSXDYLD::Terminate() { + PluginManager::UnregisterPlugin(CreateInstance); } -const char * -DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() -{ - return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; +lldb_private::ConstString DynamicLoaderMacOSXDYLD::GetPluginNameStatic() { + static ConstString g_name("macosx-dyld"); + return g_name; } +const char *DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() { + return "Dynamic loader plug-in that watches for shared library loads/unloads " + "in MacOSX user processes."; +} //------------------------------------------------------------------ // PluginInterface protocol //------------------------------------------------------------------ -lldb_private::ConstString -DynamicLoaderMacOSXDYLD::GetPluginName() -{ - return GetPluginNameStatic(); +lldb_private::ConstString DynamicLoaderMacOSXDYLD::GetPluginName() { + return GetPluginNameStatic(); } -uint32_t -DynamicLoaderMacOSXDYLD::GetPluginVersion() -{ - return 1; -} +uint32_t DynamicLoaderMacOSXDYLD::GetPluginVersion() { return 1; } -uint32_t -DynamicLoaderMacOSXDYLD::AddrByteSize() -{ - std::lock_guard<std::recursive_mutex> baseclass_guard(GetMutex()); +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; + 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; +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; } |