| //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/lldb-python.h" |
| #include "lldb/Host/Config.h" |
| |
| // C Includes |
| #include <errno.h> |
| #include <stdlib.h> |
| #ifndef LLDB_DISABLE_POSIX |
| #include <spawn.h> |
| #include <netinet/in.h> |
| #include <sys/mman.h> // for mmap |
| #endif |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <time.h> |
| |
| // C++ Includes |
| #include <algorithm> |
| #include <map> |
| |
| // Other libraries and framework includes |
| |
| #include "lldb/Breakpoint/Watchpoint.h" |
| #include "lldb/Interpreter/Args.h" |
| #include "lldb/Core/ArchSpec.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/ConnectionFileDescriptor.h" |
| #include "lldb/Host/FileSpec.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/ModuleSpec.h" |
| #include "lldb/Core/PluginManager.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Core/StreamFile.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Core/Timer.h" |
| #include "lldb/Core/Value.h" |
| #include "lldb/Host/Symbols.h" |
| #include "lldb/Host/TimeValue.h" |
| #include "lldb/Interpreter/CommandInterpreter.h" |
| #include "lldb/Interpreter/CommandObject.h" |
| #include "lldb/Interpreter/CommandObjectMultiword.h" |
| #include "lldb/Interpreter/CommandReturnObject.h" |
| #ifndef LLDB_DISABLE_PYTHON |
| #include "lldb/Interpreter/PythonDataObjects.h" |
| #endif |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Target/DynamicLoader.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/TargetList.h" |
| #include "lldb/Target/ThreadPlanCallFunction.h" |
| #include "lldb/Target/SystemRuntime.h" |
| #include "lldb/Utility/PseudoTerminal.h" |
| |
| // Project includes |
| #include "lldb/Host/Host.h" |
| #include "Plugins/Process/Utility/FreeBSDSignals.h" |
| #include "Plugins/Process/Utility/InferiorCallPOSIX.h" |
| #include "Plugins/Process/Utility/LinuxSignals.h" |
| #include "Plugins/Process/Utility/StopInfoMachException.h" |
| #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" |
| #include "Utility/StringExtractorGDBRemote.h" |
| #include "GDBRemoteRegisterContext.h" |
| #include "ProcessGDBRemote.h" |
| #include "ProcessGDBRemoteLog.h" |
| #include "ThreadGDBRemote.h" |
| |
| |
| namespace lldb |
| { |
| // Provide a function that can easily dump the packet history if we know a |
| // ProcessGDBRemote * value (which we can get from logs or from debugging). |
| // We need the function in the lldb namespace so it makes it into the final |
| // executable since the LLDB shared library only exports stuff in the lldb |
| // namespace. This allows you to attach with a debugger and call this |
| // function and get the packet history dumped to a file. |
| void |
| DumpProcessGDBRemotePacketHistory (void *p, const char *path) |
| { |
| lldb_private::StreamFile strm; |
| lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); |
| if (error.Success()) |
| ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); |
| } |
| } |
| |
| #define DEBUGSERVER_BASENAME "debugserver" |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| |
| namespace { |
| |
| static PropertyDefinition |
| g_properties[] = |
| { |
| { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, |
| { "target-definition-file" , OptionValue::eTypeFileSpec , true, 0 , NULL, NULL, "The file that provides the description for remote target registers." }, |
| { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } |
| }; |
| |
| enum |
| { |
| ePropertyPacketTimeout, |
| ePropertyTargetDefinitionFile |
| }; |
| |
| class PluginProperties : public Properties |
| { |
| public: |
| |
| static ConstString |
| GetSettingName () |
| { |
| return ProcessGDBRemote::GetPluginNameStatic(); |
| } |
| |
| PluginProperties() : |
| Properties () |
| { |
| m_collection_sp.reset (new OptionValueProperties(GetSettingName())); |
| m_collection_sp->Initialize(g_properties); |
| } |
| |
| virtual |
| ~PluginProperties() |
| { |
| } |
| |
| uint64_t |
| GetPacketTimeout() |
| { |
| const uint32_t idx = ePropertyPacketTimeout; |
| return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); |
| } |
| |
| bool |
| SetPacketTimeout(uint64_t timeout) |
| { |
| const uint32_t idx = ePropertyPacketTimeout; |
| return m_collection_sp->SetPropertyAtIndexAsUInt64(NULL, idx, timeout); |
| } |
| |
| FileSpec |
| GetTargetDefinitionFile () const |
| { |
| const uint32_t idx = ePropertyTargetDefinitionFile; |
| return m_collection_sp->GetPropertyAtIndexAsFileSpec (NULL, idx); |
| } |
| }; |
| |
| typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; |
| |
| static const ProcessKDPPropertiesSP & |
| GetGlobalPluginProperties() |
| { |
| static ProcessKDPPropertiesSP g_settings_sp; |
| if (!g_settings_sp) |
| g_settings_sp.reset (new PluginProperties ()); |
| return g_settings_sp; |
| } |
| |
| } // anonymous namespace end |
| |
| // TODO Randomly assigning a port is unsafe. We should get an unused |
| // ephemeral port from the kernel and make sure we reserve it before passing |
| // it to debugserver. |
| |
| #if defined (__APPLE__) |
| #define LOW_PORT (IPPORT_RESERVED) |
| #define HIGH_PORT (IPPORT_HIFIRSTAUTO) |
| #else |
| #define LOW_PORT (1024u) |
| #define HIGH_PORT (49151u) |
| #endif |
| |
| #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__) || defined(__aarch64__)) |
| static bool rand_initialized = false; |
| |
| static inline uint16_t |
| get_random_port () |
| { |
| if (!rand_initialized) |
| { |
| time_t seed = time(NULL); |
| |
| rand_initialized = true; |
| srand(seed); |
| } |
| return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; |
| } |
| #endif |
| |
| lldb_private::ConstString |
| ProcessGDBRemote::GetPluginNameStatic() |
| { |
| static ConstString g_name("gdb-remote"); |
| return g_name; |
| } |
| |
| const char * |
| ProcessGDBRemote::GetPluginDescriptionStatic() |
| { |
| return "GDB Remote protocol based debugging plug-in."; |
| } |
| |
| void |
| ProcessGDBRemote::Terminate() |
| { |
| PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); |
| } |
| |
| |
| lldb::ProcessSP |
| ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) |
| { |
| lldb::ProcessSP process_sp; |
| if (crash_file_path == NULL) |
| process_sp.reset (new ProcessGDBRemote (target, listener)); |
| return process_sp; |
| } |
| |
| bool |
| ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) |
| { |
| if (plugin_specified_by_name) |
| return true; |
| |
| // For now we are just making sure the file exists for a given module |
| Module *exe_module = target.GetExecutableModulePointer(); |
| if (exe_module) |
| { |
| ObjectFile *exe_objfile = exe_module->GetObjectFile(); |
| // We can't debug core files... |
| switch (exe_objfile->GetType()) |
| { |
| case ObjectFile::eTypeInvalid: |
| case ObjectFile::eTypeCoreFile: |
| case ObjectFile::eTypeDebugInfo: |
| case ObjectFile::eTypeObjectFile: |
| case ObjectFile::eTypeSharedLibrary: |
| case ObjectFile::eTypeStubLibrary: |
| case ObjectFile::eTypeJIT: |
| return false; |
| case ObjectFile::eTypeExecutable: |
| case ObjectFile::eTypeDynamicLinker: |
| case ObjectFile::eTypeUnknown: |
| break; |
| } |
| return exe_module->GetFileSpec().Exists(); |
| } |
| // However, if there is no executable module, we return true since we might be preparing to attach. |
| return true; |
| } |
| |
| //---------------------------------------------------------------------- |
| // ProcessGDBRemote constructor |
| //---------------------------------------------------------------------- |
| ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : |
| Process (target, listener), |
| m_flags (0), |
| m_gdb_comm(false), |
| m_debugserver_pid (LLDB_INVALID_PROCESS_ID), |
| m_last_stop_packet (), |
| m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), |
| m_register_info (), |
| m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), |
| m_async_thread (LLDB_INVALID_HOST_THREAD), |
| m_async_thread_state(eAsyncThreadNotStarted), |
| m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), |
| m_thread_ids (), |
| m_continue_c_tids (), |
| m_continue_C_tids (), |
| m_continue_s_tids (), |
| m_continue_S_tids (), |
| m_max_memory_size (0), |
| m_remote_stub_max_memory_size (0), |
| m_addr_to_mmap_size (), |
| m_thread_create_bp_sp (), |
| m_waiting_for_attach (false), |
| m_destroy_tried_resuming (false), |
| m_command_sp (), |
| m_breakpoint_pc_offset (0), |
| m_unix_signals_sp (new UnixSignals ()) |
| { |
| m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); |
| m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); |
| m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); |
| const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); |
| if (timeout_seconds > 0) |
| m_gdb_comm.SetPacketTimeout(timeout_seconds); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| ProcessGDBRemote::~ProcessGDBRemote() |
| { |
| // m_mach_process.UnregisterNotificationCallbacks (this); |
| Clear(); |
| // We need to call finalize on the process before destroying ourselves |
| // to make sure all of the broadcaster cleanup goes as planned. If we |
| // destruct this class, then Process::~Process() might have problems |
| // trying to fully destroy the broadcaster. |
| Finalize(); |
| |
| // The general Finalize is going to try to destroy the process and that SHOULD |
| // shut down the async thread. However, if we don't kill it it will get stranded and |
| // its connection will go away so when it wakes up it will crash. So kill it for sure here. |
| StopAsyncThread(); |
| KillDebugserverProcess(); |
| } |
| |
| //---------------------------------------------------------------------- |
| // PluginInterface |
| //---------------------------------------------------------------------- |
| ConstString |
| ProcessGDBRemote::GetPluginName() |
| { |
| return GetPluginNameStatic(); |
| } |
| |
| uint32_t |
| ProcessGDBRemote::GetPluginVersion() |
| { |
| return 1; |
| } |
| |
| bool |
| ProcessGDBRemote::ParsePythonTargetDefinition(const FileSpec &target_definition_fspec) |
| { |
| #ifndef LLDB_DISABLE_PYTHON |
| ScriptInterpreter *interpreter = GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); |
| Error error; |
| lldb::ScriptInterpreterObjectSP module_object_sp (interpreter->LoadPluginModule(target_definition_fspec, error)); |
| if (module_object_sp) |
| { |
| lldb::ScriptInterpreterObjectSP target_definition_sp (interpreter->GetDynamicSettings(module_object_sp, |
| &GetTarget(), |
| "gdb-server-target-definition", |
| error)); |
| |
| PythonDictionary target_dict(target_definition_sp); |
| |
| if (target_dict) |
| { |
| PythonDictionary host_info_dict (target_dict.GetItemForKey("host-info")); |
| if (host_info_dict) |
| { |
| ArchSpec host_arch (host_info_dict.GetItemForKeyAsString(PythonString("triple"))); |
| |
| if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) |
| { |
| GetTarget().SetArchitecture(host_arch); |
| } |
| |
| } |
| m_breakpoint_pc_offset = target_dict.GetItemForKeyAsInteger("breakpoint-pc-offset", 0); |
| |
| if (m_register_info.SetRegisterInfo (target_dict, GetTarget().GetArchitecture().GetByteOrder()) > 0) |
| { |
| return true; |
| } |
| } |
| } |
| #endif |
| return false; |
| } |
| |
| |
| void |
| ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) |
| { |
| if (!force && m_register_info.GetNumRegisters() > 0) |
| return; |
| |
| char packet[128]; |
| m_register_info.Clear(); |
| uint32_t reg_offset = 0; |
| uint32_t reg_num = 0; |
| for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; |
| response_type == StringExtractorGDBRemote::eResponse; |
| ++reg_num) |
| { |
| const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); |
| assert (packet_len < (int)sizeof(packet)); |
| StringExtractorGDBRemote response; |
| if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| response_type = response.GetResponseType(); |
| if (response_type == StringExtractorGDBRemote::eResponse) |
| { |
| std::string name; |
| std::string value; |
| ConstString reg_name; |
| ConstString alt_name; |
| ConstString set_name; |
| std::vector<uint32_t> value_regs; |
| std::vector<uint32_t> invalidate_regs; |
| RegisterInfo reg_info = { NULL, // Name |
| NULL, // Alt name |
| 0, // byte size |
| reg_offset, // offset |
| eEncodingUint, // encoding |
| eFormatHex, // formate |
| { |
| LLDB_INVALID_REGNUM, // GCC reg num |
| LLDB_INVALID_REGNUM, // DWARF reg num |
| LLDB_INVALID_REGNUM, // generic reg num |
| reg_num, // GDB reg num |
| reg_num // native register number |
| }, |
| NULL, |
| NULL |
| }; |
| |
| while (response.GetNameColonValue(name, value)) |
| { |
| if (name.compare("name") == 0) |
| { |
| reg_name.SetCString(value.c_str()); |
| } |
| else if (name.compare("alt-name") == 0) |
| { |
| alt_name.SetCString(value.c_str()); |
| } |
| else if (name.compare("bitsize") == 0) |
| { |
| reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; |
| } |
| else if (name.compare("offset") == 0) |
| { |
| uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); |
| if (reg_offset != offset) |
| { |
| reg_offset = offset; |
| } |
| } |
| else if (name.compare("encoding") == 0) |
| { |
| const Encoding encoding = Args::StringToEncoding (value.c_str()); |
| if (encoding != eEncodingInvalid) |
| reg_info.encoding = encoding; |
| } |
| else if (name.compare("format") == 0) |
| { |
| Format format = eFormatInvalid; |
| if (Args::StringToFormat (value.c_str(), format, NULL).Success()) |
| reg_info.format = format; |
| else if (value.compare("binary") == 0) |
| reg_info.format = eFormatBinary; |
| else if (value.compare("decimal") == 0) |
| reg_info.format = eFormatDecimal; |
| else if (value.compare("hex") == 0) |
| reg_info.format = eFormatHex; |
| else if (value.compare("float") == 0) |
| reg_info.format = eFormatFloat; |
| else if (value.compare("vector-sint8") == 0) |
| reg_info.format = eFormatVectorOfSInt8; |
| else if (value.compare("vector-uint8") == 0) |
| reg_info.format = eFormatVectorOfUInt8; |
| else if (value.compare("vector-sint16") == 0) |
| reg_info.format = eFormatVectorOfSInt16; |
| else if (value.compare("vector-uint16") == 0) |
| reg_info.format = eFormatVectorOfUInt16; |
| else if (value.compare("vector-sint32") == 0) |
| reg_info.format = eFormatVectorOfSInt32; |
| else if (value.compare("vector-uint32") == 0) |
| reg_info.format = eFormatVectorOfUInt32; |
| else if (value.compare("vector-float32") == 0) |
| reg_info.format = eFormatVectorOfFloat32; |
| else if (value.compare("vector-uint128") == 0) |
| reg_info.format = eFormatVectorOfUInt128; |
| } |
| else if (name.compare("set") == 0) |
| { |
| set_name.SetCString(value.c_str()); |
| } |
| else if (name.compare("gcc") == 0) |
| { |
| reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); |
| } |
| else if (name.compare("dwarf") == 0) |
| { |
| reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); |
| } |
| else if (name.compare("generic") == 0) |
| { |
| reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); |
| } |
| else if (name.compare("container-regs") == 0) |
| { |
| std::pair<llvm::StringRef, llvm::StringRef> value_pair; |
| value_pair.second = value; |
| do |
| { |
| value_pair = value_pair.second.split(','); |
| if (!value_pair.first.empty()) |
| { |
| uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); |
| if (reg != LLDB_INVALID_REGNUM) |
| value_regs.push_back (reg); |
| } |
| } while (!value_pair.second.empty()); |
| } |
| else if (name.compare("invalidate-regs") == 0) |
| { |
| std::pair<llvm::StringRef, llvm::StringRef> value_pair; |
| value_pair.second = value; |
| do |
| { |
| value_pair = value_pair.second.split(','); |
| if (!value_pair.first.empty()) |
| { |
| uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); |
| if (reg != LLDB_INVALID_REGNUM) |
| invalidate_regs.push_back (reg); |
| } |
| } while (!value_pair.second.empty()); |
| } |
| } |
| |
| reg_info.byte_offset = reg_offset; |
| assert (reg_info.byte_size != 0); |
| reg_offset += reg_info.byte_size; |
| if (!value_regs.empty()) |
| { |
| value_regs.push_back(LLDB_INVALID_REGNUM); |
| reg_info.value_regs = value_regs.data(); |
| } |
| if (!invalidate_regs.empty()) |
| { |
| invalidate_regs.push_back(LLDB_INVALID_REGNUM); |
| reg_info.invalidate_regs = invalidate_regs.data(); |
| } |
| |
| m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); |
| } |
| else |
| { |
| break; // ensure exit before reg_num is incremented |
| } |
| } |
| else |
| { |
| break; |
| } |
| } |
| |
| // Check if qHostInfo specified a specific packet timeout for this connection. |
| // If so then lets update our setting so the user knows what the timeout is |
| // and can see it. |
| const uint32_t host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout(); |
| if (host_packet_timeout) |
| { |
| GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout); |
| } |
| |
| |
| if (reg_num == 0) |
| { |
| FileSpec target_definition_fspec = GetGlobalPluginProperties()->GetTargetDefinitionFile (); |
| |
| if (target_definition_fspec) |
| { |
| // See if we can get register definitions from a python file |
| if (ParsePythonTargetDefinition (target_definition_fspec)) |
| return; |
| } |
| } |
| |
| // We didn't get anything if the accumulated reg_num is zero. See if we are |
| // debugging ARM and fill with a hard coded register set until we can get an |
| // updated debugserver down on the devices. |
| // On the other hand, if the accumulated reg_num is positive, see if we can |
| // add composite registers to the existing primordial ones. |
| bool from_scratch = (reg_num == 0); |
| |
| const ArchSpec &target_arch = GetTarget().GetArchitecture(); |
| const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); |
| const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); |
| |
| // Use the process' architecture instead of the host arch, if available |
| ArchSpec remote_arch; |
| if (remote_process_arch.IsValid ()) |
| remote_arch = remote_process_arch; |
| else |
| remote_arch = remote_host_arch; |
| |
| if (!target_arch.IsValid()) |
| { |
| if (remote_arch.IsValid() |
| && remote_arch.GetMachine() == llvm::Triple::arm |
| && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) |
| m_register_info.HardcodeARMRegisters(from_scratch); |
| } |
| else if (target_arch.GetMachine() == llvm::Triple::arm) |
| { |
| m_register_info.HardcodeARMRegisters(from_scratch); |
| } |
| |
| // At this point, we can finalize our register info. |
| m_register_info.Finalize (); |
| } |
| |
| Error |
| ProcessGDBRemote::WillLaunch (Module* module) |
| { |
| return WillLaunchOrAttach (); |
| } |
| |
| Error |
| ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) |
| { |
| return WillLaunchOrAttach (); |
| } |
| |
| Error |
| ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) |
| { |
| return WillLaunchOrAttach (); |
| } |
| |
| Error |
| ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) |
| { |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| Error error (WillLaunchOrAttach ()); |
| |
| if (error.Fail()) |
| return error; |
| |
| error = ConnectToDebugserver (remote_url); |
| |
| if (error.Fail()) |
| return error; |
| StartAsyncThread (); |
| |
| lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); |
| if (pid == LLDB_INVALID_PROCESS_ID) |
| { |
| // We don't have a valid process ID, so note that we are connected |
| // and could now request to launch or attach, or get remote process |
| // listings... |
| SetPrivateState (eStateConnected); |
| } |
| else |
| { |
| // We have a valid process |
| SetID (pid); |
| GetThreadList(); |
| if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| if (!m_target.GetArchitecture().IsValid()) |
| { |
| if (m_gdb_comm.GetProcessArchitecture().IsValid()) |
| { |
| m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); |
| } |
| else |
| { |
| m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); |
| } |
| } |
| |
| const StateType state = SetThreadStopInfo (m_last_stop_packet); |
| if (state == eStateStopped) |
| { |
| SetPrivateState (state); |
| } |
| else |
| error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); |
| } |
| else |
| error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); |
| } |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalizing target architecture initial triple: %s (GetTarget().GetArchitecture().IsValid() %s, m_gdb_comm.GetHostArchitecture().IsValid(): %s)", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str (), GetTarget ().GetArchitecture ().IsValid () ? "true" : "false", m_gdb_comm.GetHostArchitecture ().IsValid () ? "true" : "false"); |
| |
| |
| if (error.Success() |
| && !GetTarget().GetArchitecture().IsValid() |
| && m_gdb_comm.GetHostArchitecture().IsValid()) |
| { |
| // Prefer the *process'* architecture over that of the *host*, if available. |
| if (m_gdb_comm.GetProcessArchitecture().IsValid()) |
| GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); |
| else |
| GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); |
| } |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalized target architecture triple: %s", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str ()); |
| |
| // Set the Unix signals properly for the target. |
| // FIXME Add a gdb-remote packet to discover dynamically. |
| if (error.Success ()) |
| { |
| const ArchSpec arch_spec = GetTarget ().GetArchitecture (); |
| if (arch_spec.IsValid ()) |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": determining unix signals type based on architecture %s, triple %s", __FUNCTION__, GetID (), arch_spec.GetArchitectureName () ? arch_spec.GetArchitectureName () : "<null>", arch_spec.GetTriple ().getTriple ().c_str ()); |
| |
| switch (arch_spec.GetTriple ().getOS ()) |
| { |
| case llvm::Triple::Linux: |
| m_unix_signals_sp.reset (new process_linux::LinuxSignals ()); |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s using Linux unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); |
| break; |
| case llvm::Triple::OpenBSD: |
| case llvm::Triple::FreeBSD: |
| case llvm::Triple::NetBSD: |
| m_unix_signals_sp.reset (new FreeBSDSignals ()); |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s using *BSD unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); |
| break; |
| default: |
| m_unix_signals_sp.reset (new UnixSignals ()); |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s using generic unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); |
| break; |
| } |
| } |
| } |
| |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::WillLaunchOrAttach () |
| { |
| Error error; |
| m_stdio_communication.Clear (); |
| return error; |
| } |
| |
| //---------------------------------------------------------------------- |
| // Process Control |
| //---------------------------------------------------------------------- |
| Error |
| ProcessGDBRemote::DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) |
| { |
| Error error; |
| |
| uint32_t launch_flags = launch_info.GetFlags().Get(); |
| const char *stdin_path = NULL; |
| const char *stdout_path = NULL; |
| const char *stderr_path = NULL; |
| const char *working_dir = launch_info.GetWorkingDirectory(); |
| |
| const ProcessLaunchInfo::FileAction *file_action; |
| file_action = launch_info.GetFileActionForFD (STDIN_FILENO); |
| if (file_action) |
| { |
| if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) |
| stdin_path = file_action->GetPath(); |
| } |
| file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); |
| if (file_action) |
| { |
| if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) |
| stdout_path = file_action->GetPath(); |
| } |
| file_action = launch_info.GetFileActionForFD (STDERR_FILENO); |
| if (file_action) |
| { |
| if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) |
| stderr_path = file_action->GetPath(); |
| } |
| |
| // ::LogSetBitMask (GDBR_LOG_DEFAULT); |
| // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); |
| // ::LogSetLogFile ("/dev/stdout"); |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| |
| ObjectFile * object_file = exe_module->GetObjectFile(); |
| if (object_file) |
| { |
| // Make sure we aren't already connected? |
| if (!m_gdb_comm.IsConnected()) |
| { |
| error = LaunchAndConnectToDebugserver (launch_info); |
| } |
| |
| if (error.Success()) |
| { |
| lldb_utility::PseudoTerminal pty; |
| const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; |
| |
| // If the debugserver is local and we aren't disabling STDIO, lets use |
| // a pseudo terminal to instead of relying on the 'O' packets for stdio |
| // since 'O' packets can really slow down debugging if the inferior |
| // does a lot of output. |
| PlatformSP platform_sp (m_target.GetPlatform()); |
| if (platform_sp && platform_sp->IsHost() && !disable_stdio) |
| { |
| const char *slave_name = NULL; |
| if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) |
| { |
| if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) |
| slave_name = pty.GetSlaveName (NULL, 0); |
| } |
| if (stdin_path == NULL) |
| stdin_path = slave_name; |
| |
| if (stdout_path == NULL) |
| stdout_path = slave_name; |
| |
| if (stderr_path == NULL) |
| stderr_path = slave_name; |
| } |
| |
| // Set STDIN to /dev/null if we want STDIO disabled or if either |
| // STDOUT or STDERR have been set to something and STDIN hasn't |
| if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) |
| stdin_path = "/dev/null"; |
| |
| // Set STDOUT to /dev/null if we want STDIO disabled or if either |
| // STDIN or STDERR have been set to something and STDOUT hasn't |
| if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) |
| stdout_path = "/dev/null"; |
| |
| // Set STDERR to /dev/null if we want STDIO disabled or if either |
| // STDIN or STDOUT have been set to something and STDERR hasn't |
| if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) |
| stderr_path = "/dev/null"; |
| |
| if (stdin_path) |
| m_gdb_comm.SetSTDIN (stdin_path); |
| if (stdout_path) |
| m_gdb_comm.SetSTDOUT (stdout_path); |
| if (stderr_path) |
| m_gdb_comm.SetSTDERR (stderr_path); |
| |
| m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); |
| m_gdb_comm.SetDetachOnError (launch_flags & eLaunchFlagDetachOnError); |
| |
| m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); |
| |
| const char * launch_event_data = launch_info.GetLaunchEventData(); |
| if (launch_event_data != NULL && *launch_event_data != '\0') |
| m_gdb_comm.SendLaunchEventDataPacket (launch_event_data); |
| |
| if (working_dir && working_dir[0]) |
| { |
| m_gdb_comm.SetWorkingDir (working_dir); |
| } |
| |
| // Send the environment and the program + arguments after we connect |
| const Args &environment = launch_info.GetEnvironmentEntries(); |
| if (environment.GetArgumentCount()) |
| { |
| size_t num_environment_entries = environment.GetArgumentCount(); |
| for (size_t i=0; i<num_environment_entries; ++i) |
| { |
| const char *env_entry = environment.GetArgumentAtIndex(i); |
| if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) |
| break; |
| } |
| } |
| |
| const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); |
| int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info); |
| if (arg_packet_err == 0) |
| { |
| std::string error_str; |
| if (m_gdb_comm.GetLaunchSuccess (error_str)) |
| { |
| SetID (m_gdb_comm.GetCurrentProcessID ()); |
| } |
| else |
| { |
| error.SetErrorString (error_str.c_str()); |
| } |
| } |
| else |
| { |
| error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); |
| } |
| |
| m_gdb_comm.SetPacketTimeout (old_packet_timeout); |
| |
| if (GetID() == LLDB_INVALID_PROCESS_ID) |
| { |
| if (log) |
| log->Printf("failed to connect to debugserver: %s", error.AsCString()); |
| KillDebugserverProcess (); |
| return error; |
| } |
| |
| if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| if (!m_target.GetArchitecture().IsValid()) |
| { |
| if (m_gdb_comm.GetProcessArchitecture().IsValid()) |
| { |
| m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); |
| } |
| else |
| { |
| m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); |
| } |
| } |
| |
| SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); |
| |
| if (!disable_stdio) |
| { |
| if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) |
| SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); |
| } |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf("failed to connect to debugserver: %s", error.AsCString()); |
| } |
| } |
| else |
| { |
| // Set our user ID to an invalid process ID. |
| SetID(LLDB_INVALID_PROCESS_ID); |
| error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", |
| exe_module->GetFileSpec().GetFilename().AsCString(), |
| exe_module->GetArchitecture().GetArchitectureName()); |
| } |
| return error; |
| |
| } |
| |
| |
| Error |
| ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) |
| { |
| Error error; |
| // Only connect if we have a valid connect URL |
| |
| if (connect_url && connect_url[0]) |
| { |
| std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); |
| if (conn_ap.get()) |
| { |
| const uint32_t max_retry_count = 50; |
| uint32_t retry_count = 0; |
| while (!m_gdb_comm.IsConnected()) |
| { |
| if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) |
| { |
| m_gdb_comm.SetConnection (conn_ap.release()); |
| break; |
| } |
| else if (error.WasInterrupted()) |
| { |
| // If we were interrupted, don't keep retrying. |
| break; |
| } |
| |
| retry_count++; |
| |
| if (retry_count >= max_retry_count) |
| break; |
| |
| usleep (100000); |
| } |
| } |
| } |
| |
| if (!m_gdb_comm.IsConnected()) |
| { |
| if (error.Success()) |
| error.SetErrorString("not connected to remote gdb server"); |
| return error; |
| } |
| |
| // We always seem to be able to open a connection to a local port |
| // so we need to make sure we can then send data to it. If we can't |
| // then we aren't actually connected to anything, so try and do the |
| // handshake with the remote GDB server and make sure that goes |
| // alright. |
| if (!m_gdb_comm.HandshakeWithServer (&error)) |
| { |
| m_gdb_comm.Disconnect(); |
| if (error.Success()) |
| error.SetErrorString("not connected to remote gdb server"); |
| return error; |
| } |
| m_gdb_comm.GetThreadSuffixSupported (); |
| m_gdb_comm.GetListThreadsInStopReplySupported (); |
| m_gdb_comm.GetHostInfo (); |
| m_gdb_comm.GetVContSupported ('c'); |
| m_gdb_comm.GetVAttachOrWaitSupported(); |
| |
| size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); |
| for (size_t idx = 0; idx < num_cmds; idx++) |
| { |
| StringExtractorGDBRemote response; |
| m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); |
| } |
| return error; |
| } |
| |
| void |
| ProcessGDBRemote::DidLaunchOrAttach () |
| { |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DidLaunch()"); |
| if (GetID() != LLDB_INVALID_PROCESS_ID) |
| { |
| BuildDynamicRegisterInfo (false); |
| |
| // See if the GDB server supports the qHostInfo information |
| |
| ArchSpec gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); |
| |
| // See if the GDB server supports the qProcessInfo packet, if so |
| // prefer that over the Host information as it will be more specific |
| // to our process. |
| |
| if (m_gdb_comm.GetProcessArchitecture().IsValid()) |
| gdb_remote_arch = m_gdb_comm.GetProcessArchitecture(); |
| |
| if (gdb_remote_arch.IsValid()) |
| { |
| ArchSpec &target_arch = GetTarget().GetArchitecture(); |
| |
| if (target_arch.IsValid()) |
| { |
| // If the remote host is ARM and we have apple as the vendor, then |
| // ARM executables and shared libraries can have mixed ARM architectures. |
| // You can have an armv6 executable, and if the host is armv7, then the |
| // system will load the best possible architecture for all shared libraries |
| // it has, so we really need to take the remote host architecture as our |
| // defacto architecture in this case. |
| |
| if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && |
| gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) |
| { |
| target_arch = gdb_remote_arch; |
| } |
| else |
| { |
| // Fill in what is missing in the triple |
| const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); |
| llvm::Triple &target_triple = target_arch.GetTriple(); |
| if (target_triple.getVendorName().size() == 0) |
| { |
| target_triple.setVendor (remote_triple.getVendor()); |
| |
| if (target_triple.getOSName().size() == 0) |
| { |
| target_triple.setOS (remote_triple.getOS()); |
| |
| if (target_triple.getEnvironmentName().size() == 0) |
| target_triple.setEnvironment (remote_triple.getEnvironment()); |
| } |
| } |
| } |
| } |
| else |
| { |
| // The target doesn't have a valid architecture yet, set it from |
| // the architecture we got from the remote GDB server |
| target_arch = gdb_remote_arch; |
| } |
| } |
| } |
| } |
| |
| void |
| ProcessGDBRemote::DidLaunch () |
| { |
| DidLaunchOrAttach (); |
| } |
| |
| UnixSignals& |
| ProcessGDBRemote::GetUnixSignals () |
| { |
| assert (m_unix_signals_sp && "m_unix_signals_sp is null"); |
| return *m_unix_signals_sp; |
| } |
| |
| Error |
| ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) |
| { |
| ProcessAttachInfo attach_info; |
| return DoAttachToProcessWithID(attach_pid, attach_info); |
| } |
| |
| Error |
| ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) |
| { |
| Error error; |
| // Clear out and clean up from any current state |
| Clear(); |
| if (attach_pid != LLDB_INVALID_PROCESS_ID) |
| { |
| // Make sure we aren't already connected? |
| if (!m_gdb_comm.IsConnected()) |
| { |
| error = LaunchAndConnectToDebugserver (attach_info); |
| |
| if (error.Fail()) |
| { |
| const char *error_string = error.AsCString(); |
| if (error_string == NULL) |
| error_string = "unable to launch " DEBUGSERVER_BASENAME; |
| |
| SetExitStatus (-1, error_string); |
| } |
| } |
| |
| if (error.Success()) |
| { |
| m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); |
| |
| char packet[64]; |
| const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); |
| SetID (attach_pid); |
| m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); |
| } |
| } |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, const ProcessAttachInfo &attach_info) |
| { |
| Error error; |
| // Clear out and clean up from any current state |
| Clear(); |
| |
| if (process_name && process_name[0]) |
| { |
| // Make sure we aren't already connected? |
| if (!m_gdb_comm.IsConnected()) |
| { |
| error = LaunchAndConnectToDebugserver (attach_info); |
| |
| if (error.Fail()) |
| { |
| const char *error_string = error.AsCString(); |
| if (error_string == NULL) |
| error_string = "unable to launch " DEBUGSERVER_BASENAME; |
| |
| SetExitStatus (-1, error_string); |
| } |
| } |
| |
| if (error.Success()) |
| { |
| StreamString packet; |
| |
| m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); |
| |
| if (attach_info.GetWaitForLaunch()) |
| { |
| if (!m_gdb_comm.GetVAttachOrWaitSupported()) |
| { |
| packet.PutCString ("vAttachWait"); |
| } |
| else |
| { |
| if (attach_info.GetIgnoreExisting()) |
| packet.PutCString("vAttachWait"); |
| else |
| packet.PutCString ("vAttachOrWait"); |
| } |
| } |
| else |
| packet.PutCString("vAttachName"); |
| packet.PutChar(';'); |
| packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); |
| |
| m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); |
| |
| } |
| } |
| return error; |
| } |
| |
| |
| bool |
| ProcessGDBRemote::SetExitStatus (int exit_status, const char *cstr) |
| { |
| m_gdb_comm.Disconnect(); |
| return Process::SetExitStatus (exit_status, cstr); |
| } |
| |
| void |
| ProcessGDBRemote::DidAttach () |
| { |
| DidLaunchOrAttach (); |
| } |
| |
| |
| Error |
| ProcessGDBRemote::WillResume () |
| { |
| m_continue_c_tids.clear(); |
| m_continue_C_tids.clear(); |
| m_continue_s_tids.clear(); |
| m_continue_S_tids.clear(); |
| return Error(); |
| } |
| |
| Error |
| ProcessGDBRemote::DoResume () |
| { |
| Error error; |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::Resume()"); |
| |
| Listener listener ("gdb-remote.resume-packet-sent"); |
| if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) |
| { |
| listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); |
| |
| const size_t num_threads = GetThreadList().GetSize(); |
| |
| StreamString continue_packet; |
| bool continue_packet_error = false; |
| if (m_gdb_comm.HasAnyVContSupport ()) |
| { |
| if (m_continue_c_tids.size() == num_threads || |
| (m_continue_c_tids.empty() && |
| m_continue_C_tids.empty() && |
| m_continue_s_tids.empty() && |
| m_continue_S_tids.empty())) |
| { |
| // All threads are continuing, just send a "c" packet |
| continue_packet.PutCString ("c"); |
| } |
| else |
| { |
| continue_packet.PutCString ("vCont"); |
| |
| if (!m_continue_c_tids.empty()) |
| { |
| if (m_gdb_comm.GetVContSupported ('c')) |
| { |
| for (tid_collection::const_iterator t_pos = m_continue_c_tids.begin(), t_end = m_continue_c_tids.end(); t_pos != t_end; ++t_pos) |
| continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); |
| } |
| else |
| continue_packet_error = true; |
| } |
| |
| if (!continue_packet_error && !m_continue_C_tids.empty()) |
| { |
| if (m_gdb_comm.GetVContSupported ('C')) |
| { |
| for (tid_sig_collection::const_iterator s_pos = m_continue_C_tids.begin(), s_end = m_continue_C_tids.end(); s_pos != s_end; ++s_pos) |
| continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); |
| } |
| else |
| continue_packet_error = true; |
| } |
| |
| if (!continue_packet_error && !m_continue_s_tids.empty()) |
| { |
| if (m_gdb_comm.GetVContSupported ('s')) |
| { |
| for (tid_collection::const_iterator t_pos = m_continue_s_tids.begin(), t_end = m_continue_s_tids.end(); t_pos != t_end; ++t_pos) |
| continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); |
| } |
| else |
| continue_packet_error = true; |
| } |
| |
| if (!continue_packet_error && !m_continue_S_tids.empty()) |
| { |
| if (m_gdb_comm.GetVContSupported ('S')) |
| { |
| for (tid_sig_collection::const_iterator s_pos = m_continue_S_tids.begin(), s_end = m_continue_S_tids.end(); s_pos != s_end; ++s_pos) |
| continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); |
| } |
| else |
| continue_packet_error = true; |
| } |
| |
| if (continue_packet_error) |
| continue_packet.GetString().clear(); |
| } |
| } |
| else |
| continue_packet_error = true; |
| |
| if (continue_packet_error) |
| { |
| // Either no vCont support, or we tried to use part of the vCont |
| // packet that wasn't supported by the remote GDB server. |
| // We need to try and make a simple packet that can do our continue |
| const size_t num_continue_c_tids = m_continue_c_tids.size(); |
| const size_t num_continue_C_tids = m_continue_C_tids.size(); |
| const size_t num_continue_s_tids = m_continue_s_tids.size(); |
| const size_t num_continue_S_tids = m_continue_S_tids.size(); |
| if (num_continue_c_tids > 0) |
| { |
| if (num_continue_c_tids == num_threads) |
| { |
| // All threads are resuming... |
| m_gdb_comm.SetCurrentThreadForRun (-1); |
| continue_packet.PutChar ('c'); |
| continue_packet_error = false; |
| } |
| else if (num_continue_c_tids == 1 && |
| num_continue_C_tids == 0 && |
| num_continue_s_tids == 0 && |
| num_continue_S_tids == 0 ) |
| { |
| // Only one thread is continuing |
| m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); |
| continue_packet.PutChar ('c'); |
| continue_packet_error = false; |
| } |
| } |
| |
| if (continue_packet_error && num_continue_C_tids > 0) |
| { |
| if ((num_continue_C_tids + num_continue_c_tids) == num_threads && |
| num_continue_C_tids > 0 && |
| num_continue_s_tids == 0 && |
| num_continue_S_tids == 0 ) |
| { |
| const int continue_signo = m_continue_C_tids.front().second; |
| // Only one thread is continuing |
| if (num_continue_C_tids > 1) |
| { |
| // More that one thread with a signal, yet we don't have |
| // vCont support and we are being asked to resume each |
| // thread with a signal, we need to make sure they are |
| // all the same signal, or we can't issue the continue |
| // accurately with the current support... |
| if (num_continue_C_tids > 1) |
| { |
| continue_packet_error = false; |
| for (size_t i=1; i<m_continue_C_tids.size(); ++i) |
| { |
| if (m_continue_C_tids[i].second != continue_signo) |
| continue_packet_error = true; |
| } |
| } |
| if (!continue_packet_error) |
| m_gdb_comm.SetCurrentThreadForRun (-1); |
| } |
| else |
| { |
| // Set the continue thread ID |
| continue_packet_error = false; |
| m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); |
| } |
| if (!continue_packet_error) |
| { |
| // Add threads continuing with the same signo... |
| continue_packet.Printf("C%2.2x", continue_signo); |
| } |
| } |
| } |
| |
| if (continue_packet_error && num_continue_s_tids > 0) |
| { |
| if (num_continue_s_tids == num_threads) |
| { |
| // All threads are resuming... |
| m_gdb_comm.SetCurrentThreadForRun (-1); |
| continue_packet.PutChar ('s'); |
| continue_packet_error = false; |
| } |
| else if (num_continue_c_tids == 0 && |
| num_continue_C_tids == 0 && |
| num_continue_s_tids == 1 && |
| num_continue_S_tids == 0 ) |
| { |
| // Only one thread is stepping |
| m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); |
| continue_packet.PutChar ('s'); |
| continue_packet_error = false; |
| } |
| } |
| |
| if (!continue_packet_error && num_continue_S_tids > 0) |
| { |
| if (num_continue_S_tids == num_threads) |
| { |
| const int step_signo = m_continue_S_tids.front().second; |
| // Are all threads trying to step with the same signal? |
| continue_packet_error = false; |
| if (num_continue_S_tids > 1) |
| { |
| for (size_t i=1; i<num_threads; ++i) |
| { |
| if (m_continue_S_tids[i].second != step_signo) |
| continue_packet_error = true; |
| } |
| } |
| if (!continue_packet_error) |
| { |
| // Add threads stepping with the same signo... |
| m_gdb_comm.SetCurrentThreadForRun (-1); |
| continue_packet.Printf("S%2.2x", step_signo); |
| } |
| } |
| else if (num_continue_c_tids == 0 && |
| num_continue_C_tids == 0 && |
| num_continue_s_tids == 0 && |
| num_continue_S_tids == 1 ) |
| { |
| // Only one thread is stepping with signal |
| m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); |
| continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); |
| continue_packet_error = false; |
| } |
| } |
| } |
| |
| if (continue_packet_error) |
| { |
| error.SetErrorString ("can't make continue packet for this resume"); |
| } |
| else |
| { |
| EventSP event_sp; |
| TimeValue timeout; |
| timeout = TimeValue::Now(); |
| timeout.OffsetWithSeconds (5); |
| if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) |
| { |
| error.SetErrorString ("Trying to resume but the async thread is dead."); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); |
| return error; |
| } |
| |
| m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); |
| |
| if (listener.WaitForEvent (&timeout, event_sp) == false) |
| { |
| error.SetErrorString("Resume timed out."); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); |
| } |
| else if (event_sp->BroadcasterIs (&m_async_broadcaster)) |
| { |
| error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); |
| return error; |
| } |
| } |
| } |
| |
| return error; |
| } |
| |
| void |
| ProcessGDBRemote::ClearThreadIDList () |
| { |
| Mutex::Locker locker(m_thread_list_real.GetMutex()); |
| m_thread_ids.clear(); |
| } |
| |
| bool |
| ProcessGDBRemote::UpdateThreadIDList () |
| { |
| Mutex::Locker locker(m_thread_list_real.GetMutex()); |
| bool sequence_mutex_unavailable = false; |
| m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); |
| if (sequence_mutex_unavailable) |
| { |
| return false; // We just didn't get the list |
| } |
| return true; |
| } |
| |
| bool |
| ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) |
| { |
| // locker will keep a mutex locked until it goes out of scope |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); |
| if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) |
| log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); |
| |
| size_t num_thread_ids = m_thread_ids.size(); |
| // The "m_thread_ids" thread ID list should always be updated after each stop |
| // reply packet, but in case it isn't, update it here. |
| if (num_thread_ids == 0) |
| { |
| if (!UpdateThreadIDList ()) |
| return false; |
| num_thread_ids = m_thread_ids.size(); |
| } |
| |
| ThreadList old_thread_list_copy(old_thread_list); |
| if (num_thread_ids > 0) |
| { |
| for (size_t i=0; i<num_thread_ids; ++i) |
| { |
| tid_t tid = m_thread_ids[i]; |
| ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); |
| if (!thread_sp) |
| { |
| thread_sp.reset (new ThreadGDBRemote (*this, tid)); |
| if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) |
| log->Printf( |
| "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", |
| __FUNCTION__, static_cast<void*>(thread_sp.get()), |
| thread_sp->GetID()); |
| } |
| else |
| { |
| if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) |
| log->Printf( |
| "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", |
| __FUNCTION__, static_cast<void*>(thread_sp.get()), |
| thread_sp->GetID()); |
| } |
| new_thread_list.AddThread(thread_sp); |
| } |
| } |
| |
| // Whatever that is left in old_thread_list_copy are not |
| // present in new_thread_list. Remove non-existent threads from internal id table. |
| size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); |
| for (size_t i=0; i<old_num_thread_ids; i++) |
| { |
| ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); |
| if (old_thread_sp) |
| { |
| lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); |
| m_thread_id_to_index_id_map.erase(old_thread_id); |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| StateType |
| ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) |
| { |
| stop_packet.SetFilePos (0); |
| const char stop_type = stop_packet.GetChar(); |
| switch (stop_type) |
| { |
| case 'T': |
| case 'S': |
| { |
| // This is a bit of a hack, but is is required. If we did exec, we |
| // need to clear our thread lists and also know to rebuild our dynamic |
| // register info before we lookup and threads and populate the expedited |
| // register values so we need to know this right away so we can cleanup |
| // and update our registers. |
| const uint32_t stop_id = GetStopID(); |
| if (stop_id == 0) |
| { |
| // Our first stop, make sure we have a process ID, and also make |
| // sure we know about our registers |
| if (GetID() == LLDB_INVALID_PROCESS_ID) |
| { |
| lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); |
| if (pid != LLDB_INVALID_PROCESS_ID) |
| SetID (pid); |
| } |
| BuildDynamicRegisterInfo (true); |
| } |
| // Stop with signal and thread info |
| const uint8_t signo = stop_packet.GetHexU8(); |
| std::string name; |
| std::string value; |
| std::string thread_name; |
| std::string reason; |
| std::string description; |
| uint32_t exc_type = 0; |
| std::vector<addr_t> exc_data; |
| addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; |
| ThreadSP thread_sp; |
| ThreadGDBRemote *gdb_thread = NULL; |
| |
| while (stop_packet.GetNameColonValue(name, value)) |
| { |
| if (name.compare("metype") == 0) |
| { |
| // exception type in big endian hex |
| exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); |
| } |
| else if (name.compare("medata") == 0) |
| { |
| // exception data in big endian hex |
| exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); |
| } |
| else if (name.compare("thread") == 0) |
| { |
| // thread in big endian hex |
| lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); |
| // m_thread_list_real does have its own mutex, but we need to |
| // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) |
| // and the m_thread_list_real.AddThread(...) so it doesn't change on us |
| Mutex::Locker locker (m_thread_list_real.GetMutex ()); |
| thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); |
| |
| if (!thread_sp) |
| { |
| // Create the thread if we need to |
| thread_sp.reset (new ThreadGDBRemote (*this, tid)); |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); |
| if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) |
| log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", |
| __FUNCTION__, |
| static_cast<void*>(thread_sp.get()), |
| thread_sp->GetID()); |
| |
| m_thread_list_real.AddThread(thread_sp); |
| } |
| gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); |
| |
| } |
| else if (name.compare("threads") == 0) |
| { |
| Mutex::Locker locker(m_thread_list_real.GetMutex()); |
| m_thread_ids.clear(); |
| // A comma separated list of all threads in the current |
| // process that includes the thread for this stop reply |
| // packet |
| size_t comma_pos; |
| lldb::tid_t tid; |
| while ((comma_pos = value.find(',')) != std::string::npos) |
| { |
| value[comma_pos] = '\0'; |
| // thread in big endian hex |
| tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); |
| if (tid != LLDB_INVALID_THREAD_ID) |
| m_thread_ids.push_back (tid); |
| value.erase(0, comma_pos + 1); |
| } |
| tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); |
| if (tid != LLDB_INVALID_THREAD_ID) |
| m_thread_ids.push_back (tid); |
| } |
| else if (name.compare("hexname") == 0) |
| { |
| StringExtractor name_extractor; |
| // Swap "value" over into "name_extractor" |
| name_extractor.GetStringRef().swap(value); |
| // Now convert the HEX bytes into a string value |
| name_extractor.GetHexByteString (value); |
| thread_name.swap (value); |
| } |
| else if (name.compare("name") == 0) |
| { |
| thread_name.swap (value); |
| } |
| else if (name.compare("qaddr") == 0) |
| { |
| thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); |
| } |
| else if (name.compare("reason") == 0) |
| { |
| reason.swap(value); |
| } |
| else if (name.compare("description") == 0) |
| { |
| StringExtractor desc_extractor; |
| // Swap "value" over into "name_extractor" |
| desc_extractor.GetStringRef().swap(value); |
| // Now convert the HEX bytes into a string value |
| desc_extractor.GetHexByteString (thread_name); |
| } |
| else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) |
| { |
| // We have a register number that contains an expedited |
| // register value. Lets supply this register to our thread |
| // so it won't have to go and read it. |
| if (gdb_thread) |
| { |
| uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); |
| |
| if (reg != UINT32_MAX) |
| { |
| StringExtractor reg_value_extractor; |
| // Swap "value" over into "reg_value_extractor" |
| reg_value_extractor.GetStringRef().swap(value); |
| if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) |
| { |
| Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", |
| name.c_str(), |
| reg, |
| reg, |
| reg_value_extractor.GetStringRef().c_str(), |
| stop_packet.GetStringRef().c_str()); |
| } |
| } |
| } |
| } |
| } |
| |
| // If the response is old style 'S' packet which does not provide us with thread information |
| // then update the thread list and choose the first one. |
| if (!thread_sp) |
| { |
| UpdateThreadIDList (); |
| |
| if (!m_thread_ids.empty ()) |
| { |
| Mutex::Locker locker (m_thread_list_real.GetMutex ()); |
| thread_sp = m_thread_list_real.FindThreadByProtocolID (m_thread_ids.front (), false); |
| if (thread_sp) |
| gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get ()); |
| } |
| } |
| |
| if (thread_sp) |
| { |
| // Clear the stop info just in case we don't set it to anything |
| thread_sp->SetStopInfo (StopInfoSP()); |
| |
| gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); |
| gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); |
| if (exc_type != 0) |
| { |
| const size_t exc_data_size = exc_data.size(); |
| |
| thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, |
| exc_type, |
| exc_data_size, |
| exc_data_size >= 1 ? exc_data[0] : 0, |
| exc_data_size >= 2 ? exc_data[1] : 0, |
| exc_data_size >= 3 ? exc_data[2] : 0)); |
| } |
| else |
| { |
| bool handled = false; |
| bool did_exec = false; |
| if (!reason.empty()) |
| { |
| if (reason.compare("trace") == 0) |
| { |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); |
| handled = true; |
| } |
| else if (reason.compare("breakpoint") == 0) |
| { |
| addr_t pc = thread_sp->GetRegisterContext()->GetPC(); |
| lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); |
| if (bp_site_sp) |
| { |
| // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, |
| // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that |
| // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. |
| handled = true; |
| if (bp_site_sp->ValidForThisThread (thread_sp.get())) |
| { |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); |
| } |
| else |
| { |
| StopInfoSP invalid_stop_info_sp; |
| thread_sp->SetStopInfo (invalid_stop_info_sp); |
| } |
| } |
| } |
| else if (reason.compare("trap") == 0) |
| { |
| // Let the trap just use the standard signal stop reason below... |
| } |
| else if (reason.compare("watchpoint") == 0) |
| { |
| break_id_t watch_id = LLDB_INVALID_WATCH_ID; |
| // TODO: locate the watchpoint somehow... |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); |
| handled = true; |
| } |
| else if (reason.compare("exception") == 0) |
| { |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); |
| handled = true; |
| } |
| else if (reason.compare("exec") == 0) |
| { |
| did_exec = true; |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); |
| handled = true; |
| } |
| } |
| |
| if (!handled && signo && did_exec == false) |
| { |
| if (signo == SIGTRAP) |
| { |
| // Currently we are going to assume SIGTRAP means we are either |
| // hitting a breakpoint or hardware single stepping. |
| handled = true; |
| addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; |
| lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); |
| |
| if (bp_site_sp) |
| { |
| // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, |
| // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that |
| // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. |
| if (bp_site_sp->ValidForThisThread (thread_sp.get())) |
| { |
| if(m_breakpoint_pc_offset != 0) |
| thread_sp->GetRegisterContext()->SetPC(pc); |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); |
| } |
| else |
| { |
| StopInfoSP invalid_stop_info_sp; |
| thread_sp->SetStopInfo (invalid_stop_info_sp); |
| } |
| } |
| else |
| { |
| // If we were stepping then assume the stop was the result of the trace. If we were |
| // not stepping then report the SIGTRAP. |
| // FIXME: We are still missing the case where we single step over a trap instruction. |
| if (thread_sp->GetTemporaryResumeState() == eStateStepping) |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); |
| else |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); |
| } |
| } |
| if (!handled) |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); |
| } |
| |
| if (!description.empty()) |
| { |
| lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); |
| if (stop_info_sp) |
| { |
| stop_info_sp->SetDescription (description.c_str()); |
| } |
| else |
| { |
| thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); |
| } |
| } |
| } |
| } |
| return eStateStopped; |
| } |
| break; |
| |
| case 'W': |
| case 'X': |
| // process exited |
| return eStateExited; |
| |
| default: |
| break; |
| } |
| return eStateInvalid; |
| } |
| |
| void |
| ProcessGDBRemote::RefreshStateAfterStop () |
| { |
| Mutex::Locker locker(m_thread_list_real.GetMutex()); |
| m_thread_ids.clear(); |
| // Set the thread stop info. It might have a "threads" key whose value is |
| // a list of all thread IDs in the current process, so m_thread_ids might |
| // get set. |
| SetThreadStopInfo (m_last_stop_packet); |
| // Check to see if SetThreadStopInfo() filled in m_thread_ids? |
| if (m_thread_ids.empty()) |
| { |
| // No, we need to fetch the thread list manually |
| UpdateThreadIDList(); |
| } |
| |
| // Let all threads recover from stopping and do any clean up based |
| // on the previous thread state (if any). |
| m_thread_list_real.RefreshStateAfterStop(); |
| |
| } |
| |
| Error |
| ProcessGDBRemote::DoHalt (bool &caused_stop) |
| { |
| Error error; |
| |
| bool timed_out = false; |
| Mutex::Locker locker; |
| |
| if (m_public_state.GetValue() == eStateAttaching) |
| { |
| // We are being asked to halt during an attach. We need to just close |
| // our file handle and debugserver will go away, and we can be done... |
| m_gdb_comm.Disconnect(); |
| } |
| else |
| { |
| if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) |
| { |
| if (timed_out) |
| error.SetErrorString("timed out sending interrupt packet"); |
| else |
| error.SetErrorString("unknown error sending interrupt packet"); |
| } |
| |
| caused_stop = m_gdb_comm.GetInterruptWasSent (); |
| } |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::DoDetach(bool keep_stopped) |
| { |
| Error error; |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); |
| |
| error = m_gdb_comm.Detach (keep_stopped); |
| if (log) |
| { |
| if (error.Success()) |
| log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); |
| else |
| log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); |
| } |
| |
| if (!error.Success()) |
| return error; |
| |
| // Sleep for one second to let the process get all detached... |
| StopAsyncThread (); |
| |
| SetPrivateState (eStateDetached); |
| ResumePrivateStateThread(); |
| |
| //KillDebugserverProcess (); |
| return error; |
| } |
| |
| |
| Error |
| ProcessGDBRemote::DoDestroy () |
| { |
| Error error; |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDestroy()"); |
| |
| // There is a bug in older iOS debugservers where they don't shut down the process |
| // they are debugging properly. If the process is sitting at a breakpoint or an exception, |
| // this can cause problems with restarting. So we check to see if any of our threads are stopped |
| // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN |
| // destroy it again. |
| // |
| // Note, we don't have a good way to test the version of debugserver, but I happen to know that |
| // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of |
| // the debugservers with this bug are equal. There really should be a better way to test this! |
| // |
| // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and |
| // get called here to destroy again and we're still at a breakpoint or exception, then we should |
| // just do the straight-forward kill. |
| // |
| // And of course, if we weren't able to stop the process by the time we get here, it isn't |
| // necessary (or helpful) to do any of this. |
| |
| if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) |
| { |
| PlatformSP platform_sp = GetTarget().GetPlatform(); |
| |
| // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. |
| if (platform_sp |
| && platform_sp->GetName() |
| && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) |
| { |
| if (m_destroy_tried_resuming) |
| { |
| if (log) |
| log->PutCString ("ProcessGDBRemote::DoDestroy() - Tried resuming to destroy once already, not doing it again."); |
| } |
| else |
| { |
| // At present, the plans are discarded and the breakpoints disabled Process::Destroy, |
| // but we really need it to happen here and it doesn't matter if we do it twice. |
| m_thread_list.DiscardThreadPlans(); |
| DisableAllBreakpointSites(); |
| |
| bool stop_looks_like_crash = false; |
| ThreadList &threads = GetThreadList(); |
| |
| { |
| Mutex::Locker locker(threads.GetMutex()); |
| |
| size_t num_threads = threads.GetSize(); |
| for (size_t i = 0; i < num_threads; i++) |
| { |
| ThreadSP thread_sp = threads.GetThreadAtIndex(i); |
| StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); |
| StopReason reason = eStopReasonInvalid; |
| if (stop_info_sp) |
| reason = stop_info_sp->GetStopReason(); |
| if (reason == eStopReasonBreakpoint |
| || reason == eStopReasonException) |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", |
| thread_sp->GetProtocolID(), |
| stop_info_sp->GetDescription()); |
| stop_looks_like_crash = true; |
| break; |
| } |
| } |
| } |
| |
| if (stop_looks_like_crash) |
| { |
| if (log) |
| log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); |
| m_destroy_tried_resuming = true; |
| |
| // If we are going to run again before killing, it would be good to suspend all the threads |
| // before resuming so they won't get into more trouble. Sadly, for the threads stopped with |
| // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do |
| // have to run the risk of letting those threads proceed a bit. |
| |
| { |
| Mutex::Locker locker(threads.GetMutex()); |
| |
| size_t num_threads = threads.GetSize(); |
| for (size_t i = 0; i < num_threads; i++) |
| { |
| ThreadSP thread_sp = threads.GetThreadAtIndex(i); |
| StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); |
| StopReason reason = eStopReasonInvalid; |
| if (stop_info_sp) |
| reason = stop_info_sp->GetStopReason(); |
| if (reason != eStopReasonBreakpoint |
| && reason != eStopReasonException) |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", |
| thread_sp->GetProtocolID()); |
| thread_sp->SetResumeState(eStateSuspended); |
| } |
| } |
| } |
| Resume (); |
| return Destroy(); |
| } |
| } |
| } |
| } |
| |
| // Interrupt if our inferior is running... |
| int exit_status = SIGABRT; |
| std::string exit_string; |
| |
| if (m_gdb_comm.IsConnected()) |
| { |
| if (m_public_state.GetValue() != eStateAttaching) |
| { |
| |
| StringExtractorGDBRemote response; |
| bool send_async = true; |
| const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); |
| |
| if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| char packet_cmd = response.GetChar(0); |
| |
| if (packet_cmd == 'W' || packet_cmd == 'X') |
| { |
| #if defined(__APPLE__) |
| // For Native processes on Mac OS X, we launch through the Host Platform, then hand the process off |
| // to debugserver, which becomes the parent process through "PT_ATTACH". Then when we go to kill |
| // the process on Mac OS X we call ptrace(PT_KILL) to kill it, then we call waitpid which returns |
| // with no error and the correct status. But amusingly enough that doesn't seem to actually reap |
| // the process, but instead it is left around as a Zombie. Probably the kernel is in the process of |
| // switching ownership back to lldb which was the original parent, and gets confused in the handoff. |
| // Anyway, so call waitpid here to finally reap it. |
| PlatformSP platform_sp(GetTarget().GetPlatform()); |
| if (platform_sp && platform_sp->IsHost()) |
| { |
| int status; |
| ::pid_t reap_pid; |
| reap_pid = waitpid (GetID(), &status, WNOHANG); |
| if (log) |
| log->Printf ("Reaped pid: %d, status: %d.\n", reap_pid, status); |
| } |
| #endif |
| SetLastStopPacket (response); |
| ClearThreadIDList (); |
| exit_status = response.GetHexU8(); |
| } |
| else |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); |
| exit_string.assign("got unexpected response to k packet: "); |
| exit_string.append(response.GetStringRef()); |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); |
| exit_string.assign("failed to send the k packet"); |
| } |
| |
| m_gdb_comm.SetPacketTimeout(old_packet_timeout); |
| } |
| else |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoDestroy - killed or interrupted while attaching"); |
| exit_string.assign ("killed or interrupted while attaching."); |
| } |
| } |
| else |
| { |
| // If we missed setting the exit status on the way out, do it here. |
| // NB set exit status can be called multiple times, the first one sets the status. |
| exit_string.assign("destroying when not connected to debugserver"); |
| } |
| |
| SetExitStatus(exit_status, exit_string.c_str()); |
| |
| StopAsyncThread (); |
| KillDebugserverProcess (); |
| return error; |
| } |
| |
| void |
| ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) |
| { |
| lldb_private::Mutex::Locker locker (m_last_stop_packet_mutex); |
| const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; |
| if (did_exec) |
| { |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); |
| |
| m_thread_list_real.Clear(); |
| m_thread_list.Clear(); |
| BuildDynamicRegisterInfo (true); |
| m_gdb_comm.ResetDiscoverableSettings(); |
| } |
| m_last_stop_packet = response; |
| } |
| |
| |
| //------------------------------------------------------------------ |
| // Process Queries |
| //------------------------------------------------------------------ |
| |
| bool |
| ProcessGDBRemote::IsAlive () |
| { |
| return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; |
| } |
| |
| addr_t |
| ProcessGDBRemote::GetImageInfoAddress() |
| { |
| return m_gdb_comm.GetShlibInfoAddr(); |
| } |
| |
| //------------------------------------------------------------------ |
| // Process Memory |
| //------------------------------------------------------------------ |
| size_t |
| ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) |
| { |
| GetMaxMemorySize (); |
| if (size > m_max_memory_size) |
| { |
| // Keep memory read sizes down to a sane limit. This function will be |
| // called multiple times in order to complete the task by |
| // lldb_private::Process so it is ok to do this. |
| size = m_max_memory_size; |
| } |
| |
| char packet[64]; |
| int packet_len; |
| bool binary_memory_read = m_gdb_comm.GetxPacketSupported(); |
| if (binary_memory_read) |
| { |
| packet_len = ::snprintf (packet, sizeof(packet), "x0x%" PRIx64 ",0x%" PRIx64, (uint64_t)addr, (uint64_t)size); |
| } |
| else |
| { |
| packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); |
| } |
| assert (packet_len + 1 < (int)sizeof(packet)); |
| StringExtractorGDBRemote response; |
| if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| if (response.IsNormalResponse()) |
| { |
| error.Clear(); |
| if (binary_memory_read) |
| { |
| // The lower level GDBRemoteCommunication packet receive layer has already de-quoted any |
| // 0x7d character escaping that was present in the packet |
| |
| size_t data_received_size = response.GetBytesLeft(); |
| if (data_received_size > size) |
| { |
| // Don't write past the end of BUF if the remote debug server gave us too |
| // much data for some reason. |
| data_received_size = size; |
| } |
| memcpy (buf, response.GetStringRef().data(), data_received_size); |
| return data_received_size; |
| } |
| else |
| { |
| return response.GetHexBytes(buf, size, '\xdd'); |
| } |
| } |
| else if (response.IsErrorResponse()) |
| error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); |
| else if (response.IsUnsupportedResponse()) |
| error.SetErrorStringWithFormat("GDB server does not support reading memory"); |
| else |
| error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); |
| } |
| else |
| { |
| error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); |
| } |
| return 0; |
| } |
| |
| size_t |
| ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) |
| { |
| GetMaxMemorySize (); |
| if (size > m_max_memory_size) |
| { |
| // Keep memory read sizes down to a sane limit. This function will be |
| // called multiple times in order to complete the task by |
| // lldb_private::Process so it is ok to do this. |
| size = m_max_memory_size; |
| } |
| |
| StreamString packet; |
| packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); |
| packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); |
| StringExtractorGDBRemote response; |
| if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| if (response.IsOKResponse()) |
| { |
| error.Clear(); |
| return size; |
| } |
| else if (response.IsErrorResponse()) |
| error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); |
| else if (response.IsUnsupportedResponse()) |
| error.SetErrorStringWithFormat("GDB server does not support writing memory"); |
| else |
| error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); |
| } |
| else |
| { |
| error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); |
| } |
| return 0; |
| } |
| |
| lldb::addr_t |
| ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) |
| { |
| lldb_private::Log *log (lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_EXPRESSIONS)); |
| addr_t allocated_addr = LLDB_INVALID_ADDRESS; |
| |
| LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); |
| switch (supported) |
| { |
| case eLazyBoolCalculate: |
| case eLazyBoolYes: |
| allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); |
| if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) |
| return allocated_addr; |
| |
| case eLazyBoolNo: |
| // Call mmap() to create memory in the inferior.. |
| unsigned prot = 0; |
| if (permissions & lldb::ePermissionsReadable) |
| prot |= eMmapProtRead; |
| if (permissions & lldb::ePermissionsWritable) |
| prot |= eMmapProtWrite; |
| if (permissions & lldb::ePermissionsExecutable) |
| prot |= eMmapProtExec; |
| |
| if (InferiorCallMmap(this, allocated_addr, 0, size, prot, |
| eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) |
| m_addr_to_mmap_size[allocated_addr] = size; |
| else |
| { |
| allocated_addr = LLDB_INVALID_ADDRESS; |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s no direct stub support for memory allocation, and InferiorCallMmap also failed - is stub missing register context save/restore capability?", __FUNCTION__); |
| } |
| break; |
| } |
| |
| if (allocated_addr == LLDB_INVALID_ADDRESS) |
| error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); |
| else |
| error.Clear(); |
| return allocated_addr; |
| } |
| |
| Error |
| ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, |
| MemoryRegionInfo ®ion_info) |
| { |
| |
| Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) |
| { |
| |
| Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) |
| { |
| Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) |
| { |
| Error error; |
| LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); |
| |
| switch (supported) |
| { |
| case eLazyBoolCalculate: |
| // We should never be deallocating memory without allocating memory |
| // first so we should never get eLazyBoolCalculate |
| error.SetErrorString ("tried to deallocate memory without ever allocating memory"); |
| break; |
| |
| case eLazyBoolYes: |
| if (!m_gdb_comm.DeallocateMemory (addr)) |
| error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); |
| break; |
| |
| case eLazyBoolNo: |
| // Call munmap() to deallocate memory in the inferior.. |
| { |
| MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); |
| if (pos != m_addr_to_mmap_size.end() && |
| InferiorCallMunmap(this, addr, pos->second)) |
| m_addr_to_mmap_size.erase (pos); |
| else |
| error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); |
| } |
| break; |
| } |
| |
| return error; |
| } |
| |
| |
| //------------------------------------------------------------------ |
| // Process STDIO |
| //------------------------------------------------------------------ |
| size_t |
| ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) |
| { |
| if (m_stdio_communication.IsConnected()) |
| { |
| ConnectionStatus status; |
| m_stdio_communication.Write(src, src_len, status, NULL); |
| } |
| return 0; |
| } |
| |
| Error |
| ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) |
| { |
| Error error; |
| assert(bp_site != NULL); |
| |
| // Get logging info |
| Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); |
| user_id_t site_id = bp_site->GetID(); |
| |
| // Get the breakpoint address |
| const addr_t addr = bp_site->GetLoadAddress(); |
| |
| // Log that a breakpoint was requested |
| if (log) |
| log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); |
| |
| // Breakpoint already exists and is enabled |
| if (bp_site->IsEnabled()) |
| { |
| if (log) |
| log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); |
| return error; |
| } |
| |
| // Get the software breakpoint trap opcode size |
| const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site); |
| |
| // SupportsGDBStoppointPacket() simply checks a boolean, indicating if this breakpoint type |
| // is supported by the remote stub. These are set to true by default, and later set to false |
| // only after we receive an unimplemented response when sending a breakpoint packet. This means |
| // initially that unless we were specifically instructed to use a hardware breakpoint, LLDB will |
| // attempt to set a software breakpoint. HardwareRequired() also queries a boolean variable which |
| // indicates if the user specifically asked for hardware breakpoints. If true then we will |
| // skip over software breakpoints. |
| if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware) && (!bp_site->HardwareRequired())) |
| { |
| // Try to send off a software breakpoint packet ($Z0) |
| if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) |
| { |
| // The breakpoint was placed successfully |
| bp_site->SetEnabled(true); |
| bp_site->SetType(BreakpointSite::eExternal); |
| return error; |
| } |
| |
| // SendGDBStoppointTypePacket() will return an error if it was unable to set this |
| // breakpoint. We need to differentiate between a error specific to placing this breakpoint |
| // or if we have learned that this breakpoint type is unsupported. To do this, we |
| // must test the support boolean for this breakpoint type to see if it now indicates that |
| // this breakpoint type is unsupported. If they are still supported then we should return |
| // with the error code. If they are now unsupported, then we would like to fall through |
| // and try another form of breakpoint. |
| if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware)) |
| return error; |
| |
| // We reach here when software breakpoints have been found to be unsupported. For future |
| // calls to set a breakpoint, we will not attempt to set a breakpoint with a type that is |
| // known not to be supported. |
| if (log) |
| log->Printf("Software breakpoints are unsupported"); |
| |
| // So we will fall through and try a hardware breakpoint |
| } |
| |
| // The process of setting a hardware breakpoint is much the same as above. We check the |
| // supported boolean for this breakpoint type, and if it is thought to be supported then we |
| // will try to set this breakpoint with a hardware breakpoint. |
| if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) |
| { |
| // Try to send off a hardware breakpoint packet ($Z1) |
| if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) |
| { |
| // The breakpoint was placed successfully |
| bp_site->SetEnabled(true); |
| bp_site->SetType(BreakpointSite::eHardware); |
| return error; |
| } |
| |
| // Check if the error was something other then an unsupported breakpoint type |
| if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) |
| { |
| // Unable to set this hardware breakpoint |
| error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); |
| return error; |
| } |
| |
| // We will reach here when the stub gives an unsupported response to a hardware breakpoint |
| if (log) |
| log->Printf("Hardware breakpoints are unsupported"); |
| |
| // Finally we will falling through to a #trap style breakpoint |
| } |
| |
| // Don't fall through when hardware breakpoints were specifically requested |
| if (bp_site->HardwareRequired()) |
| { |
| error.SetErrorString("hardware breakpoints are not supported"); |
| return error; |
| } |
| |
| // As a last resort we want to place a manual breakpoint. An instruction |
| // is placed into the process memory using memory write packets. |
| return EnableSoftwareBreakpoint(bp_site); |
| } |
| |
| Error |
| ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) |
| { |
| Error error; |
| assert (bp_site != NULL); |
| addr_t addr = bp_site->GetLoadAddress(); |
| user_id_t site_id = bp_site->GetID(); |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); |
| |
| if (bp_site->IsEnabled()) |
| { |
| const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); |
| |
| BreakpointSite::Type bp_type = bp_site->GetType(); |
| switch (bp_type) |
| { |
| case BreakpointSite::eSoftware: |
| error = DisableSoftwareBreakpoint (bp_site); |
| break; |
| |
| case BreakpointSite::eHardware: |
| if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, false, addr, bp_op_size)) |
| error.SetErrorToGenericError(); |
| break; |
| |
| case BreakpointSite::eExternal: |
| { |
| GDBStoppointType stoppoint_type; |
| if (bp_site->IsHardware()) |
| stoppoint_type = eBreakpointHardware; |
| else |
| stoppoint_type = eBreakpointSoftware; |
| |
| if (m_gdb_comm.SendGDBStoppointTypePacket(stoppoint_type, false, addr, bp_op_size)) |
| error.SetErrorToGenericError(); |
| } |
| break; |
| } |
| if (error.Success()) |
| bp_site->SetEnabled(false); |
| } |
| else |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); |
| return error; |
| } |
| |
| if (error.Success()) |
| error.SetErrorToGenericError(); |
| return error; |
| } |
| |
| // Pre-requisite: wp != NULL. |
| static GDBStoppointType |
| GetGDBStoppointType (Watchpoint *wp) |
| { |
| assert(wp); |
| bool watch_read = wp->WatchpointRead(); |
| bool watch_write = wp->WatchpointWrite(); |
| |
| // watch_read and watch_write cannot both be false. |
| assert(watch_read || watch_write); |
| if (watch_read && watch_write) |
| return eWatchpointReadWrite; |
| else if (watch_read) |
| return eWatchpointRead; |
| else // Must be watch_write, then. |
| return eWatchpointWrite; |
| } |
| |
| Error |
| ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) |
| { |
| Error error; |
| if (wp) |
| { |
| user_id_t watchID = wp->GetID(); |
| addr_t addr = wp->GetLoadAddress(); |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); |
| if (wp->IsEnabled()) |
| { |
| if (log) |
| log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); |
| return error; |
| } |
| |
| GDBStoppointType type = GetGDBStoppointType(wp); |
| // Pass down an appropriate z/Z packet... |
| if (m_gdb_comm.SupportsGDBStoppointPacket (type)) |
| { |
| if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) |
| { |
| wp->SetEnabled(true, notify); |
| return error; |
| } |
| else |
| error.SetErrorString("sending gdb watchpoint packet failed"); |
| } |
| else |
| error.SetErrorString("watchpoints not supported"); |
| } |
| else |
| { |
| error.SetErrorString("Watchpoint argument was NULL."); |
| } |
| if (error.Success()) |
| error.SetErrorToGenericError(); |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) |
| { |
| Error error; |
| if (wp) |
| { |
| user_id_t watchID = wp->GetID(); |
| |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); |
| |
| addr_t addr = wp->GetLoadAddress(); |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); |
| |
| if (!wp->IsEnabled()) |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); |
| // See also 'class WatchpointSentry' within StopInfo.cpp. |
| // This disabling attempt might come from the user-supplied actions, we'll route it in order for |
| // the watchpoint object to intelligently process this action. |
| wp->SetEnabled(false, notify); |
| return error; |
| } |
| |
| if (wp->IsHardware()) |
| { |
| GDBStoppointType type = GetGDBStoppointType(wp); |
| // Pass down an appropriate z/Z packet... |
| if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) |
| { |
| wp->SetEnabled(false, notify); |
| return error; |
| } |
| else |
| error.SetErrorString("sending gdb watchpoint packet failed"); |
| } |
| // TODO: clear software watchpoints if we implement them |
| } |
| else |
| { |
| error.SetErrorString("Watchpoint argument was NULL."); |
| } |
| if (error.Success()) |
| error.SetErrorToGenericError(); |
| return error; |
| } |
| |
| void |
| ProcessGDBRemote::Clear() |
| { |
| m_flags = 0; |
| m_thread_list_real.Clear(); |
| m_thread_list.Clear(); |
| } |
| |
| Error |
| ProcessGDBRemote::DoSignal (int signo) |
| { |
| Error error; |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); |
| |
| if (!m_gdb_comm.SendAsyncSignal (signo)) |
| error.SetErrorStringWithFormat("failed to send signal %i", signo); |
| return error; |
| } |
| |
| Error |
| ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) |
| { |
| Error error; |
| if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) |
| { |
| // If we locate debugserver, keep that located version around |
| static FileSpec g_debugserver_file_spec; |
| |
| ProcessLaunchInfo debugserver_launch_info; |
| debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); |
| debugserver_launch_info.SetUserID(process_info.GetUserID()); |
| |
| #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) |
| // On iOS, still do a local connection using a random port |
| const char *hostname = "127.0.0.1"; |
| uint16_t port = get_random_port (); |
| #else |
| // Set hostname being NULL to do the reverse connect where debugserver |
| // will bind to port zero and it will communicate back to us the port |
| // that we will connect to |
| const char *hostname = NULL; |
| uint16_t port = 0; |
| #endif |
| |
| error = m_gdb_comm.StartDebugserverProcess (hostname, |
| port, |
| debugserver_launch_info, |
| port); |
| |
| if (error.Success ()) |
| m_debugserver_pid = debugserver_launch_info.GetProcessID(); |
| else |
| m_debugserver_pid = LLDB_INVALID_PROCESS_ID; |
| |
| if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) |
| StartAsyncThread (); |
| |
| if (error.Fail()) |
| { |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| |
| if (log) |
| log->Printf("failed to start debugserver process: %s", error.AsCString()); |
| return error; |
| } |
| |
| if (m_gdb_comm.IsConnected()) |
| { |
| // Finish the connection process by doing the handshake without connecting (send NULL URL) |
| ConnectToDebugserver (NULL); |
| } |
| else |
| { |
| StreamString connect_url; |
| connect_url.Printf("connect://%s:%u", hostname, port); |
| error = ConnectToDebugserver (connect_url.GetString().c_str()); |
| } |
| |
| } |
| return error; |
| } |
| |
| bool |
| ProcessGDBRemote::MonitorDebugserverProcess |
| ( |
| void *callback_baton, |
| lldb::pid_t debugserver_pid, |
| bool exited, // True if the process did exit |
| int signo, // Zero for no signal |
| int exit_status // Exit value of process if signal is zero |
| ) |
| { |
| // The baton is a "ProcessGDBRemote *". Now this class might be gone |
| // and might not exist anymore, so we need to carefully try to get the |
| // target for this process first since we have a race condition when |
| // we are done running between getting the notice that the inferior |
| // process has died and the debugserver that was debugging this process. |
| // In our test suite, we are also continually running process after |
| // process, so we must be very careful to make sure: |
| // 1 - process object hasn't been deleted already |
| // 2 - that a new process object hasn't been recreated in its place |
| |
| // "debugserver_pid" argument passed in is the process ID for |
| // debugserver that we are tracking... |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| |
| ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; |
| |
| // Get a shared pointer to the target that has a matching process pointer. |
| // This target could be gone, or the target could already have a new process |
| // object inside of it |
| TargetSP target_sp (Debugger::FindTargetWithProcess(process)); |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); |
| |
| if (target_sp) |
| { |
| // We found a process in a target that matches, but another thread |
| // might be in the process of launching a new process that will |
| // soon replace it, so get a shared pointer to the process so we |
| // can keep it alive. |
| ProcessSP process_sp (target_sp->GetProcessSP()); |
| // Now we have a shared pointer to the process that can't go away on us |
| // so we now make sure it was the same as the one passed in, and also make |
| // sure that our previous "process *" didn't get deleted and have a new |
| // "process *" created in its place with the same pointer. To verify this |
| // we make sure the process has our debugserver process ID. If we pass all |
| // of these tests, then we are sure that this process is the one we were |
| // looking for. |
| if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) |
| { |
| // Sleep for a half a second to make sure our inferior process has |
| // time to set its exit status before we set it incorrectly when |
| // both the debugserver and the inferior process shut down. |
| usleep (500000); |
| // If our process hasn't yet exited, debugserver might have died. |
| // If the process did exit, the we are reaping it. |
| const StateType state = process->GetState(); |
| |
| if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && |
| state != eStateInvalid && |
| state != eStateUnloaded && |
| state != eStateExited && |
| state != eStateDetached) |
| { |
| char error_str[1024]; |
| if (signo) |
| { |
| const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); |
| if (signal_cstr) |
| ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); |
| else |
| ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); |
| } |
| else |
| { |
| ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); |
| } |
| |
| process->SetExitStatus (-1, error_str); |
| } |
| // Debugserver has exited we need to let our ProcessGDBRemote |
| // know that it no longer has a debugserver instance |
| process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; |
| } |
| } |
| return true; |
| } |
| |
| void |
| ProcessGDBRemote::KillDebugserverProcess () |
| { |
| m_gdb_comm.Disconnect(); |
| if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) |
| { |
| Host::Kill (m_debugserver_pid, SIGINT); |
| m_debugserver_pid = LLDB_INVALID_PROCESS_ID; |
| } |
| } |
| |
| void |
| ProcessGDBRemote::Initialize() |
| { |
| static bool g_initialized = false; |
| |
| if (g_initialized == false) |
| { |
| g_initialized = true; |
| PluginManager::RegisterPlugin (GetPluginNameStatic(), |
| GetPluginDescriptionStatic(), |
| CreateInstance, |
| DebuggerInitialize); |
| |
| Log::Callbacks log_callbacks = { |
| ProcessGDBRemoteLog::DisableLog, |
| ProcessGDBRemoteLog::EnableLog, |
| ProcessGDBRemoteLog::ListLogCategories |
| }; |
| |
| Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); |
| } |
| } |
| |
| void |
| ProcessGDBRemote::DebuggerInitialize (lldb_private::Debugger &debugger) |
| { |
| if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) |
| { |
| const bool is_global_setting = true; |
| PluginManager::CreateSettingForProcessPlugin (debugger, |
| GetGlobalPluginProperties()->GetValueProperties(), |
| ConstString ("Properties for the gdb-remote process plug-in."), |
| is_global_setting); |
| } |
| } |
| |
| bool |
| ProcessGDBRemote::StartAsyncThread () |
| { |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); |
| |
| Mutex::Locker start_locker(m_async_thread_state_mutex); |
| if (m_async_thread_state == eAsyncThreadNotStarted) |
| { |
| // Create a thread that watches our internal state and controls which |
| // events make it to clients (into the DCProcess event queue). |
| m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); |
| if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) |
| { |
| m_async_thread_state = eAsyncThreadRunning; |
| return true; |
| } |
| else |
| return false; |
| } |
| else |
| { |
| // Somebody tried to start the async thread while it was either being started or stopped. If the former, and |
| // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); |
| if (m_async_thread_state == eAsyncThreadRunning) |
| return true; |
| else |
| return false; |
| } |
| } |
| |
| void |
| ProcessGDBRemote::StopAsyncThread () |
| { |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); |
| |
| Mutex::Locker start_locker(m_async_thread_state_mutex); |
| if (m_async_thread_state == eAsyncThreadRunning) |
| { |
| m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); |
| |
| // This will shut down the async thread. |
| m_gdb_comm.Disconnect(); // Disconnect from the debug server. |
| |
| // Stop the stdio thread |
| if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) |
| { |
| Host::ThreadJoin (m_async_thread, NULL, NULL); |
| } |
| m_async_thread_state = eAsyncThreadDone; |
| } |
| else |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); |
| } |
| } |
| |
| |
| thread_result_t |
| ProcessGDBRemote::AsyncThread (void *arg) |
| { |
| ProcessGDBRemote *process = (ProcessGDBRemote*) arg; |
| |
| Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); |
| |
| Listener listener ("ProcessGDBRemote::AsyncThread"); |
| EventSP event_sp; |
| const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | |
| eBroadcastBitAsyncThreadShouldExit; |
| |
| if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) |
| { |
| listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); |
| |
| bool done = false; |
| while (!done) |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); |
| if (listener.WaitForEvent (NULL, event_sp)) |
| { |
| const uint32_t event_type = event_sp->GetType(); |
| if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); |
| |
| switch (event_type) |
| { |
| case eBroadcastBitAsyncContinue: |
| { |
| const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); |
| |
| if (continue_packet) |
| { |
| const char *continue_cstr = (const char *)continue_packet->GetBytes (); |
| const size_t continue_cstr_len = continue_packet->GetByteSize (); |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); |
| |
| if (::strstr (continue_cstr, "vAttach") == NULL) |
| process->SetPrivateState(eStateRunning); |
| StringExtractorGDBRemote response; |
| StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); |
| |
| // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. |
| // The thread ID list might be contained within the "response", or the stop reply packet that |
| // caused the stop. So clear it now before we give the stop reply packet to the process |
| // using the process->SetLastStopPacket()... |
| process->ClearThreadIDList (); |
| |
| switch (stop_state) |
| { |
| case eStateStopped: |
| case eStateCrashed: |
| case eStateSuspended: |
| process->SetLastStopPacket (response); |
| process->SetPrivateState (stop_state); |
| break; |
| |
| case eStateExited: |
| { |
| process->SetLastStopPacket (response); |
| process->ClearThreadIDList(); |
| response.SetFilePos(1); |
| |
| int exit_status = response.GetHexU8(); |
| const char *desc_cstr = NULL; |
| StringExtractor extractor; |
| std::string desc_string; |
| if (response.GetBytesLeft() > 0 && response.GetChar('-') == ';') |
| { |
| std::string desc_token; |
| while (response.GetNameColonValue (desc_token, desc_string)) |
| { |
| if (desc_token == "description") |
| { |
| extractor.GetStringRef().swap(desc_string); |
| extractor.SetFilePos(0); |
| extractor.GetHexByteString (desc_string); |
| desc_cstr = desc_string.c_str(); |
| } |
| } |
| } |
| process->SetExitStatus(exit_status, desc_cstr); |
| done = true; |
| break; |
| } |
| case eStateInvalid: |
| process->SetExitStatus(-1, "lost connection"); |
| break; |
| |
| default: |
| process->SetPrivateState (stop_state); |
| break; |
| } |
| } |
| } |
| break; |
| |
| case eBroadcastBitAsyncThreadShouldExit: |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); |
| done = true; |
| break; |
| |
| default: |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); |
| done = true; |
| break; |
| } |
| } |
| else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) |
| { |
| if (event_type & Communication::eBroadcastBitReadThreadDidExit) |
| { |
| process->SetExitStatus (-1, "lost connection"); |
| done = true; |
| } |
| } |
| } |
| else |
| { |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); |
| done = true; |
| } |
| } |
| } |
| |
| if (log) |
| log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); |
| |
| process->m_async_thread = LLDB_INVALID_HOST_THREAD; |
| return NULL; |
| } |
| |
| //uint32_t |
| //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) |
| //{ |
| // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver |
| // // process and ask it for the list of processes. But if we are local, we can let the Host do it. |
| // if (m_local_debugserver) |
| // { |
| // return Host::ListProcessesMatchingName (name, matches, pids); |
| // } |
| // else |
| // { |
| // // FIXME: Implement talking to the remote debugserver. |
| // return 0; |
| // } |
| // |
| //} |
| // |
| bool |
| ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, |
| lldb_private::StoppointCallbackContext *context, |
| lldb::user_id_t break_id, |
| lldb::user_id_t break_loc_id) |
| { |
| // I don't think I have to do anything here, just make sure I notice the new thread when it starts to |
| // run so I can stop it if that's what I want to do. |
| Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (log) |
| log->Printf("Hit New Thread Notification breakpoint."); |
| return false; |
| } |
| |
| |
| bool |
| ProcessGDBRemote::StartNoticingNewThreads() |
| { |
| Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (m_thread_create_bp_sp) |
| { |
| if (log && log->GetVerbose()) |
| log->Printf("Enabled noticing new thread breakpoint."); |
| m_thread_create_bp_sp->SetEnabled(true); |
| } |
| else |
| { |
| PlatformSP platform_sp (m_target.GetPlatform()); |
| if (platform_sp) |
| { |
| m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); |
| if (m_thread_create_bp_sp) |
| { |
| if (log && log->GetVerbose()) |
| log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); |
| m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); |
| } |
| else |
| { |
| if (log) |
| log->Printf("Failed to create new thread notification breakpoint."); |
| } |
| } |
| } |
| return m_thread_create_bp_sp.get() != NULL; |
| } |
| |
| bool |
| ProcessGDBRemote::StopNoticingNewThreads() |
| { |
| Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (log && log->GetVerbose()) |
| log->Printf ("Disabling new thread notification breakpoint."); |
| |
| if (m_thread_create_bp_sp) |
| m_thread_create_bp_sp->SetEnabled(false); |
| |
| return true; |
| } |
| |
| lldb_private::DynamicLoader * |
| ProcessGDBRemote::GetDynamicLoader () |
| { |
| if (m_dyld_ap.get() == NULL) |
| m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); |
| return m_dyld_ap.get(); |
| } |
| |
| Error |
| ProcessGDBRemote::SendEventData(const char *data) |
| { |
| int return_value; |
| bool was_supported; |
| |
| Error error; |
| |
| return_value = m_gdb_comm.SendLaunchEventDataPacket (data, &was_supported); |
| if (return_value != 0) |
| { |
| if (!was_supported) |
| error.SetErrorString("Sending events is not supported for this process."); |
| else |
| error.SetErrorStringWithFormat("Error sending event data: %d.", return_value); |
| } |
| return error; |
| } |
| |
| const DataBufferSP |
| ProcessGDBRemote::GetAuxvData() |
| { |
| DataBufferSP buf; |
| if (m_gdb_comm.GetQXferAuxvReadSupported()) |
| { |
| std::string response_string; |
| if (m_gdb_comm.SendPacketsAndConcatenateResponses("qXfer:auxv:read::", response_string) == GDBRemoteCommunication::PacketResult::Success) |
| buf.reset(new DataBufferHeap(response_string.c_str(), response_string.length())); |
| } |
| return buf; |
| } |
| |
| StructuredData::ObjectSP |
| ProcessGDBRemote::GetExtendedInfoForThread (lldb::tid_t tid) |
| { |
| StructuredData::ObjectSP object_sp; |
| |
| if (m_gdb_comm.GetThreadExtendedInfoSupported()) |
| { |
| StructuredData::ObjectSP args_dict(new StructuredData::Dictionary()); |
| SystemRuntime *runtime = GetSystemRuntime(); |
| if (runtime) |
| { |
| runtime->AddThreadExtendedInfoPacketHints (args_dict); |
| } |
| args_dict->GetAsDictionary()->AddIntegerItem ("thread", tid); |
| |
| StreamString packet; |
| packet << "jThreadExtendedInfo:"; |
| args_dict->Dump (packet); |
| |
| // FIXME the final character of a JSON dictionary, '}', is the escape |
| // character in gdb-remote binary mode. lldb currently doesn't escape |
| // these characters in its packet output -- so we add the quoted version |
| // of the } character here manually in case we talk to a debugserver which |
| // un-escapes the characters at packet read time. |
| packet << (char) (0x7d ^ 0x20); |
| |
| StringExtractorGDBRemote response; |
| if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, false) == GDBRemoteCommunication::PacketResult::Success) |
| { |
| StringExtractorGDBRemote::ResponseType response_type = response.GetResponseType(); |
| if (response_type == StringExtractorGDBRemote::eResponse) |
| { |
| if (!response.Empty()) |
| { |
| // The packet has already had the 0x7d xor quoting stripped out at the |
| // GDBRemoteCommunication packet receive level. |
| object_sp = StructuredData::ParseJSON (response.GetStringRef()); |
| } |
| } |
| } |
| } |
| return object_sp; |
| } |
| |
| // Establish the largest memory read/write payloads we should use. |
| // If the remote stub has a max packet size, stay under that size. |
| // |
| // If the remote stub's max packet size is crazy large, use a |
| // reasonable largeish default. |
| // |
| // If the remote stub doesn't advertise a max packet size, use a |
| // conservative default. |
| |
| void |
| ProcessGDBRemote::GetMaxMemorySize() |
| { |
| const uint64_t reasonable_largeish_default = 128 * 1024; |
| const uint64_t conservative_default = 512; |
| |
| if (m_max_memory_size == 0) |
| { |
| uint64_t stub_max_size = m_gdb_comm.GetRemoteMaxPacketSize(); |
| if (stub_max_size != UINT64_MAX && stub_max_size != 0) |
| { |
| // Save the stub's claimed maximum packet size |
| m_remote_stub_max_memory_size = stub_max_size; |
| |
| // Even if the stub says it can support ginormous packets, |
| // don't exceed our reasonable largeish default packet size. |
| if (stub_max_size > reasonable_largeish_default) |
| { |
| stub_max_size = reasonable_largeish_default; |
| } |
| |
| m_max_memory_size = stub_max_size; |
| } |
| else |
| { |
| m_max_memory_size = conservative_default; |
| } |
| } |
| } |
| |
| void |
| ProcessGDBRemote::SetUserSpecifiedMaxMemoryTransferSize (uint64_t user_specified_max) |
| { |
| if (user_specified_max != 0) |
| { |
| GetMaxMemorySize (); |
| |
| if (m_remote_stub_max_memory_size != 0) |
| { |
| if (m_remote_stub_max_memory_size < user_specified_max) |
| { |
| m_max_memory_size = m_remote_stub_max_memory_size; // user specified a packet size too big, go as big |
| // as the remote stub says we can go. |
| } |
| else |
| { |
| m_max_memory_size = user_specified_max; // user's packet size is good |
| } |
| } |
| else |
| { |
| m_max_memory_size = user_specified_max; // user's packet size is probably fine |
| } |
| } |
| } |
| |
| class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed |
| { |
| private: |
| |
| public: |
| CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : |
| CommandObjectParsed (interpreter, |
| "process plugin packet history", |
| "Dumps the packet history buffer. ", |
| NULL) |
| { |
| } |
| |
| ~CommandObjectProcessGDBRemotePacketHistory () |
| { |
| } |
| |
| bool |
| DoExecute (Args& command, CommandReturnObject &result) |
| { |
| const size_t argc = command.GetArgumentCount(); |
| if (argc == 0) |
| { |
| ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); |
| if (process) |
| { |
| process->GetGDBRemote().DumpHistory(result.GetOutputStream()); |
| result.SetStatus (eReturnStatusSuccessFinishResult); |
| return true; |
| } |
| } |
| else |
| { |
| result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); |
| } |
| result.SetStatus (eReturnStatusFailed); |
| return false; |
| } |
| }; |
| |
| class CommandObjectProcessGDBRemotePacketXferSize : public CommandObjectParsed |
| { |
| private: |
| |
| public: |
| CommandObjectProcessGDBRemotePacketXferSize(CommandInterpreter &interpreter) : |
| CommandObjectParsed (interpreter, |
| "process plugin packet xfer-size", |
| "Maximum size that lldb will try to read/write one one chunk.", |
| NULL) |
| { |
| } |
| |
| ~CommandObjectProcessGDBRemotePacketXferSize () |
| { |
| } |
| |
| bool |
| DoExecute (Args& command, CommandReturnObject &result) |
| { |
| const size_t argc = command.GetArgumentCount(); |
| if (argc == 0) |
| { |
| result.AppendErrorWithFormat ("'%s' takes an argument to specify the max amount to be transferred when reading/writing", m_cmd_name.c_str()); |
| result.SetStatus (eReturnStatusFailed); |
| return false; |
| } |
| |
| ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); |
| if (process) |
| { |
| const char *packet_size = command.GetArgumentAtIndex(0); |
| errno = 0; |
| uint64_t user_specified_max = strtoul (packet_size, NULL, 10); |
| if (errno == 0 && user_specified_max != 0) |
| { |
| process->SetUserSpecifiedMaxMemoryTransferSize (user_specified_max); |
| result.SetStatus (eReturnStatusSuccessFinishResult); |
| return true; |
| } |
| } |
| result.SetStatus (eReturnStatusFailed); |
| return false; |
| } |
| }; |
| |
| |
| class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed |
| { |
| private: |
| |
| public: |
| CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : |
| CommandObjectParsed (interpreter, |
| "process plugin packet send", |
| "Send a custom packet through the GDB remote protocol and print the answer. " |
| "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", |
| NULL) |
| { |
| } |
| |
| ~CommandObjectProcessGDBRemotePacketSend () |
| { |
| } |
| |
| bool |
| DoExecute (Args& command, CommandReturnObject &result) |
| { |
| const size_t argc = command.GetArgumentCount(); |
| if (argc == 0) |
| { |
| result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); |
| result.SetStatus (eReturnStatusFailed); |
| return false; |
| } |
| |
| ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); |
| if (process) |
| { |
| for (size_t i=0; i<argc; ++ i) |
| { |
| const char *packet_cstr = command.GetArgumentAtIndex(0); |
| bool send_async = true; |
| StringExtractorGDBRemote response; |
| process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); |
| result.SetStatus (eReturnStatusSuccessFinishResult); |
| Stream &output_strm = result.GetOutputStream(); |
| output_strm.Printf (" packet: %s\n", packet_cstr); |
| std::string &response_str = response.GetStringRef(); |
| |
| if (strstr(packet_cstr, "qGetProfileData") != NULL) |
| { |
| response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); |
| } |
| |
| if (response_str.empty()) |
| output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); |
| else |
| output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); |
| } |
| } |
| return true; |
| } |
| }; |
| |
| class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw |
| { |
| private: |
| |
| public: |
| CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : |
| CommandObjectRaw (interpreter, |
| "process plugin packet monitor", |
| "Send a qRcmd packet through the GDB remote protocol and print the response." |
| "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", |
| NULL) |
| { |
| } |
| |
| ~CommandObjectProcessGDBRemotePacketMonitor () |
| { |
| } |
| |
| bool |
| DoExecute (const char *command, CommandReturnObject &result) |
| { |
| if (command == NULL || command[0] == '\0') |
| { |
| result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); |
| result.SetStatus (eReturnStatusFailed); |
| return false; |
| } |
| |
| ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); |
| if (process) |
| { |
| StreamString packet; |
| packet.PutCString("qRcmd,"); |
| packet.PutBytesAsRawHex8(command, strlen(command)); |
| const char *packet_cstr = packet.GetString().c_str(); |
| |
| bool send_async = true; |
| StringExtractorGDBRemote response; |
| process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); |
| result.SetStatus (eReturnStatusSuccessFinishResult); |
| Stream &output_strm = result.GetOutputStream(); |
| output_strm.Printf (" packet: %s\n", packet_cstr); |
| const std::string &response_str = response.GetStringRef(); |
| |
| if (response_str.empty()) |
| output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); |
| else |
| output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); |
| } |
| return true; |
| } |
| }; |
| |
| class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword |
| { |
| private: |
| |
| public: |
| CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : |
| CommandObjectMultiword (interpreter, |
| "process plugin packet", |
| "Commands that deal with GDB remote packets.", |
| NULL) |
| { |
| LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); |
| LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); |
| LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); |
| LoadSubCommand ("xfer-size", CommandObjectSP (new CommandObjectProcessGDBRemotePacketXferSize (interpreter))); |
| } |
| |
| ~CommandObjectProcessGDBRemotePacket () |
| { |
| } |
| }; |
| |
| class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword |
| { |
| public: |
| CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : |
| CommandObjectMultiword (interpreter, |
| "process plugin", |
| "A set of commands for operating on a ProcessGDBRemote process.", |
| "process plugin <subcommand> [<subcommand-options>]") |
| { |
| LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); |
| } |
| |
| ~CommandObjectMultiwordProcessGDBRemote () |
| { |
| } |
| }; |
| |
| CommandObject * |
| ProcessGDBRemote::GetPluginCommandObject() |
| { |
| if (!m_command_sp) |
| m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); |
| return m_command_sp.get(); |
| } |