1 //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/lldb-python.h" 11 #include "lldb/Host/Config.h" 12 13 // C Includes 14 #include <errno.h> 15 #include <stdlib.h> 16 #ifndef LLDB_DISABLE_POSIX 17 #include <spawn.h> 18 #include <netinet/in.h> 19 #include <sys/mman.h> // for mmap 20 #endif 21 #include <sys/stat.h> 22 #include <sys/types.h> 23 #include <time.h> 24 25 // C++ Includes 26 #include <algorithm> 27 #include <map> 28 29 // Other libraries and framework includes 30 31 #include "lldb/Breakpoint/Watchpoint.h" 32 #include "lldb/Interpreter/Args.h" 33 #include "lldb/Core/ArchSpec.h" 34 #include "lldb/Core/Debugger.h" 35 #include "lldb/Core/ConnectionFileDescriptor.h" 36 #include "lldb/Host/FileSpec.h" 37 #include "lldb/Core/Module.h" 38 #include "lldb/Core/ModuleSpec.h" 39 #include "lldb/Core/PluginManager.h" 40 #include "lldb/Core/State.h" 41 #include "lldb/Core/StreamFile.h" 42 #include "lldb/Core/StreamString.h" 43 #include "lldb/Core/Timer.h" 44 #include "lldb/Core/Value.h" 45 #include "lldb/Host/Symbols.h" 46 #include "lldb/Host/TimeValue.h" 47 #include "lldb/Interpreter/CommandInterpreter.h" 48 #include "lldb/Interpreter/CommandObject.h" 49 #include "lldb/Interpreter/CommandObjectMultiword.h" 50 #include "lldb/Interpreter/CommandReturnObject.h" 51 #ifndef LLDB_DISABLE_PYTHON 52 #include "lldb/Interpreter/PythonDataObjects.h" 53 #endif 54 #include "lldb/Symbol/ObjectFile.h" 55 #include "lldb/Target/DynamicLoader.h" 56 #include "lldb/Target/Target.h" 57 #include "lldb/Target/TargetList.h" 58 #include "lldb/Target/ThreadPlanCallFunction.h" 59 #include "lldb/Utility/PseudoTerminal.h" 60 61 // Project includes 62 #include "lldb/Host/Host.h" 63 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 64 #include "Plugins/Process/Utility/StopInfoMachException.h" 65 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 66 #include "Utility/StringExtractorGDBRemote.h" 67 #include "GDBRemoteRegisterContext.h" 68 #include "ProcessGDBRemote.h" 69 #include "ProcessGDBRemoteLog.h" 70 #include "ThreadGDBRemote.h" 71 72 73 namespace lldb 74 { 75 // Provide a function that can easily dump the packet history if we know a 76 // ProcessGDBRemote * value (which we can get from logs or from debugging). 77 // We need the function in the lldb namespace so it makes it into the final 78 // executable since the LLDB shared library only exports stuff in the lldb 79 // namespace. This allows you to attach with a debugger and call this 80 // function and get the packet history dumped to a file. 81 void 82 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 83 { 84 lldb_private::StreamFile strm; 85 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 86 if (error.Success()) 87 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 88 } 89 } 90 91 #define DEBUGSERVER_BASENAME "debugserver" 92 using namespace lldb; 93 using namespace lldb_private; 94 95 96 namespace { 97 98 static PropertyDefinition 99 g_properties[] = 100 { 101 { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, 102 { "target-definition-file" , OptionValue::eTypeFileSpec , true, 0 , NULL, NULL, "The file that provides the description for remote target registers." }, 103 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 104 }; 105 106 enum 107 { 108 ePropertyPacketTimeout, 109 ePropertyTargetDefinitionFile 110 }; 111 112 class PluginProperties : public Properties 113 { 114 public: 115 116 static ConstString 117 GetSettingName () 118 { 119 return ProcessGDBRemote::GetPluginNameStatic(); 120 } 121 122 PluginProperties() : 123 Properties () 124 { 125 m_collection_sp.reset (new OptionValueProperties(GetSettingName())); 126 m_collection_sp->Initialize(g_properties); 127 } 128 129 virtual 130 ~PluginProperties() 131 { 132 } 133 134 uint64_t 135 GetPacketTimeout() 136 { 137 const uint32_t idx = ePropertyPacketTimeout; 138 return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); 139 } 140 141 bool 142 SetPacketTimeout(uint64_t timeout) 143 { 144 const uint32_t idx = ePropertyPacketTimeout; 145 return m_collection_sp->SetPropertyAtIndexAsUInt64(NULL, idx, timeout); 146 } 147 148 FileSpec 149 GetTargetDefinitionFile () const 150 { 151 const uint32_t idx = ePropertyTargetDefinitionFile; 152 return m_collection_sp->GetPropertyAtIndexAsFileSpec (NULL, idx); 153 } 154 }; 155 156 typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; 157 158 static const ProcessKDPPropertiesSP & 159 GetGlobalPluginProperties() 160 { 161 static ProcessKDPPropertiesSP g_settings_sp; 162 if (!g_settings_sp) 163 g_settings_sp.reset (new PluginProperties ()); 164 return g_settings_sp; 165 } 166 167 } // anonymous namespace end 168 169 static bool rand_initialized = false; 170 171 // TODO Randomly assigning a port is unsafe. We should get an unused 172 // ephemeral port from the kernel and make sure we reserve it before passing 173 // it to debugserver. 174 175 #if defined (__APPLE__) 176 #define LOW_PORT (IPPORT_RESERVED) 177 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 178 #else 179 #define LOW_PORT (1024u) 180 #define HIGH_PORT (49151u) 181 #endif 182 183 static inline uint16_t 184 get_random_port () 185 { 186 if (!rand_initialized) 187 { 188 time_t seed = time(NULL); 189 190 rand_initialized = true; 191 srand(seed); 192 } 193 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 194 } 195 196 197 lldb_private::ConstString 198 ProcessGDBRemote::GetPluginNameStatic() 199 { 200 static ConstString g_name("gdb-remote"); 201 return g_name; 202 } 203 204 const char * 205 ProcessGDBRemote::GetPluginDescriptionStatic() 206 { 207 return "GDB Remote protocol based debugging plug-in."; 208 } 209 210 void 211 ProcessGDBRemote::Terminate() 212 { 213 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 214 } 215 216 217 lldb::ProcessSP 218 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 219 { 220 lldb::ProcessSP process_sp; 221 if (crash_file_path == NULL) 222 process_sp.reset (new ProcessGDBRemote (target, listener)); 223 return process_sp; 224 } 225 226 bool 227 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 228 { 229 if (plugin_specified_by_name) 230 return true; 231 232 // For now we are just making sure the file exists for a given module 233 Module *exe_module = target.GetExecutableModulePointer(); 234 if (exe_module) 235 { 236 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 237 // We can't debug core files... 238 switch (exe_objfile->GetType()) 239 { 240 case ObjectFile::eTypeInvalid: 241 case ObjectFile::eTypeCoreFile: 242 case ObjectFile::eTypeDebugInfo: 243 case ObjectFile::eTypeObjectFile: 244 case ObjectFile::eTypeSharedLibrary: 245 case ObjectFile::eTypeStubLibrary: 246 return false; 247 case ObjectFile::eTypeExecutable: 248 case ObjectFile::eTypeDynamicLinker: 249 case ObjectFile::eTypeUnknown: 250 break; 251 } 252 return exe_module->GetFileSpec().Exists(); 253 } 254 // However, if there is no executable module, we return true since we might be preparing to attach. 255 return true; 256 } 257 258 //---------------------------------------------------------------------- 259 // ProcessGDBRemote constructor 260 //---------------------------------------------------------------------- 261 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 262 Process (target, listener), 263 m_flags (0), 264 m_gdb_comm(false), 265 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 266 m_last_stop_packet (), 267 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 268 m_register_info (), 269 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 270 m_async_thread (LLDB_INVALID_HOST_THREAD), 271 m_async_thread_state(eAsyncThreadNotStarted), 272 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 273 m_thread_ids (), 274 m_continue_c_tids (), 275 m_continue_C_tids (), 276 m_continue_s_tids (), 277 m_continue_S_tids (), 278 m_max_memory_size (512), 279 m_addr_to_mmap_size (), 280 m_thread_create_bp_sp (), 281 m_waiting_for_attach (false), 282 m_destroy_tried_resuming (false), 283 m_command_sp (), 284 m_breakpoint_pc_offset (0) 285 { 286 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 287 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 288 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 289 const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); 290 if (timeout_seconds > 0) 291 m_gdb_comm.SetPacketTimeout(timeout_seconds); 292 } 293 294 //---------------------------------------------------------------------- 295 // Destructor 296 //---------------------------------------------------------------------- 297 ProcessGDBRemote::~ProcessGDBRemote() 298 { 299 // m_mach_process.UnregisterNotificationCallbacks (this); 300 Clear(); 301 // We need to call finalize on the process before destroying ourselves 302 // to make sure all of the broadcaster cleanup goes as planned. If we 303 // destruct this class, then Process::~Process() might have problems 304 // trying to fully destroy the broadcaster. 305 Finalize(); 306 307 // The general Finalize is going to try to destroy the process and that SHOULD 308 // shut down the async thread. However, if we don't kill it it will get stranded and 309 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 310 StopAsyncThread(); 311 KillDebugserverProcess(); 312 } 313 314 //---------------------------------------------------------------------- 315 // PluginInterface 316 //---------------------------------------------------------------------- 317 ConstString 318 ProcessGDBRemote::GetPluginName() 319 { 320 return GetPluginNameStatic(); 321 } 322 323 uint32_t 324 ProcessGDBRemote::GetPluginVersion() 325 { 326 return 1; 327 } 328 329 bool 330 ProcessGDBRemote::ParsePythonTargetDefinition(const FileSpec &target_definition_fspec) 331 { 332 #ifndef LLDB_DISABLE_PYTHON 333 ScriptInterpreter *interpreter = GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 334 Error error; 335 lldb::ScriptInterpreterObjectSP module_object_sp (interpreter->LoadPluginModule(target_definition_fspec, error)); 336 if (module_object_sp) 337 { 338 lldb::ScriptInterpreterObjectSP target_definition_sp (interpreter->GetDynamicSettings(module_object_sp, 339 &GetTarget(), 340 "gdb-server-target-definition", 341 error)); 342 343 PythonDictionary target_dict(target_definition_sp); 344 345 if (target_dict) 346 { 347 PythonDictionary host_info_dict (target_dict.GetItemForKey("host-info")); 348 if (host_info_dict) 349 { 350 ArchSpec host_arch (host_info_dict.GetItemForKeyAsString(PythonString("triple"))); 351 352 if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) 353 { 354 GetTarget().SetArchitecture(host_arch); 355 } 356 357 } 358 m_breakpoint_pc_offset = target_dict.GetItemForKeyAsInteger("breakpoint-pc-offset", 0); 359 360 if (m_register_info.SetRegisterInfo (target_dict, GetTarget().GetArchitecture().GetByteOrder()) > 0) 361 { 362 return true; 363 } 364 } 365 } 366 #endif 367 return false; 368 } 369 370 371 void 372 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 373 { 374 if (!force && m_register_info.GetNumRegisters() > 0) 375 return; 376 377 char packet[128]; 378 m_register_info.Clear(); 379 uint32_t reg_offset = 0; 380 uint32_t reg_num = 0; 381 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 382 response_type == StringExtractorGDBRemote::eResponse; 383 ++reg_num) 384 { 385 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 386 assert (packet_len < (int)sizeof(packet)); 387 StringExtractorGDBRemote response; 388 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false) == GDBRemoteCommunication::PacketResult::Success) 389 { 390 response_type = response.GetResponseType(); 391 if (response_type == StringExtractorGDBRemote::eResponse) 392 { 393 std::string name; 394 std::string value; 395 ConstString reg_name; 396 ConstString alt_name; 397 ConstString set_name; 398 std::vector<uint32_t> value_regs; 399 std::vector<uint32_t> invalidate_regs; 400 RegisterInfo reg_info = { NULL, // Name 401 NULL, // Alt name 402 0, // byte size 403 reg_offset, // offset 404 eEncodingUint, // encoding 405 eFormatHex, // formate 406 { 407 LLDB_INVALID_REGNUM, // GCC reg num 408 LLDB_INVALID_REGNUM, // DWARF reg num 409 LLDB_INVALID_REGNUM, // generic reg num 410 reg_num, // GDB reg num 411 reg_num // native register number 412 }, 413 NULL, 414 NULL 415 }; 416 417 while (response.GetNameColonValue(name, value)) 418 { 419 if (name.compare("name") == 0) 420 { 421 reg_name.SetCString(value.c_str()); 422 } 423 else if (name.compare("alt-name") == 0) 424 { 425 alt_name.SetCString(value.c_str()); 426 } 427 else if (name.compare("bitsize") == 0) 428 { 429 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 430 } 431 else if (name.compare("offset") == 0) 432 { 433 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 434 if (reg_offset != offset) 435 { 436 reg_offset = offset; 437 } 438 } 439 else if (name.compare("encoding") == 0) 440 { 441 const Encoding encoding = Args::StringToEncoding (value.c_str()); 442 if (encoding != eEncodingInvalid) 443 reg_info.encoding = encoding; 444 } 445 else if (name.compare("format") == 0) 446 { 447 Format format = eFormatInvalid; 448 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 449 reg_info.format = format; 450 else if (value.compare("binary") == 0) 451 reg_info.format = eFormatBinary; 452 else if (value.compare("decimal") == 0) 453 reg_info.format = eFormatDecimal; 454 else if (value.compare("hex") == 0) 455 reg_info.format = eFormatHex; 456 else if (value.compare("float") == 0) 457 reg_info.format = eFormatFloat; 458 else if (value.compare("vector-sint8") == 0) 459 reg_info.format = eFormatVectorOfSInt8; 460 else if (value.compare("vector-uint8") == 0) 461 reg_info.format = eFormatVectorOfUInt8; 462 else if (value.compare("vector-sint16") == 0) 463 reg_info.format = eFormatVectorOfSInt16; 464 else if (value.compare("vector-uint16") == 0) 465 reg_info.format = eFormatVectorOfUInt16; 466 else if (value.compare("vector-sint32") == 0) 467 reg_info.format = eFormatVectorOfSInt32; 468 else if (value.compare("vector-uint32") == 0) 469 reg_info.format = eFormatVectorOfUInt32; 470 else if (value.compare("vector-float32") == 0) 471 reg_info.format = eFormatVectorOfFloat32; 472 else if (value.compare("vector-uint128") == 0) 473 reg_info.format = eFormatVectorOfUInt128; 474 } 475 else if (name.compare("set") == 0) 476 { 477 set_name.SetCString(value.c_str()); 478 } 479 else if (name.compare("gcc") == 0) 480 { 481 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 482 } 483 else if (name.compare("dwarf") == 0) 484 { 485 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 486 } 487 else if (name.compare("generic") == 0) 488 { 489 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 490 } 491 else if (name.compare("container-regs") == 0) 492 { 493 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 494 value_pair.second = value; 495 do 496 { 497 value_pair = value_pair.second.split(','); 498 if (!value_pair.first.empty()) 499 { 500 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 501 if (reg != LLDB_INVALID_REGNUM) 502 value_regs.push_back (reg); 503 } 504 } while (!value_pair.second.empty()); 505 } 506 else if (name.compare("invalidate-regs") == 0) 507 { 508 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 509 value_pair.second = value; 510 do 511 { 512 value_pair = value_pair.second.split(','); 513 if (!value_pair.first.empty()) 514 { 515 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 516 if (reg != LLDB_INVALID_REGNUM) 517 invalidate_regs.push_back (reg); 518 } 519 } while (!value_pair.second.empty()); 520 } 521 } 522 523 reg_info.byte_offset = reg_offset; 524 assert (reg_info.byte_size != 0); 525 reg_offset += reg_info.byte_size; 526 if (!value_regs.empty()) 527 { 528 value_regs.push_back(LLDB_INVALID_REGNUM); 529 reg_info.value_regs = value_regs.data(); 530 } 531 if (!invalidate_regs.empty()) 532 { 533 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 534 reg_info.invalidate_regs = invalidate_regs.data(); 535 } 536 537 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 538 } 539 else 540 { 541 break; // ensure exit before reg_num is incremented 542 } 543 } 544 else 545 { 546 break; 547 } 548 } 549 550 // Check if qHostInfo specified a specific packet timeout for this connection. 551 // If so then lets update our setting so the user knows what the timeout is 552 // and can see it. 553 const uint32_t host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout(); 554 if (host_packet_timeout) 555 { 556 GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout); 557 } 558 559 560 if (reg_num == 0) 561 { 562 FileSpec target_definition_fspec = GetGlobalPluginProperties()->GetTargetDefinitionFile (); 563 564 if (target_definition_fspec) 565 { 566 // See if we can get register definitions from a python file 567 if (ParsePythonTargetDefinition (target_definition_fspec)) 568 return; 569 } 570 } 571 572 // We didn't get anything if the accumulated reg_num is zero. See if we are 573 // debugging ARM and fill with a hard coded register set until we can get an 574 // updated debugserver down on the devices. 575 // On the other hand, if the accumulated reg_num is positive, see if we can 576 // add composite registers to the existing primordial ones. 577 bool from_scratch = (reg_num == 0); 578 579 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 580 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 581 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 582 583 // Use the process' architecture instead of the host arch, if available 584 ArchSpec remote_arch; 585 if (remote_process_arch.IsValid ()) 586 remote_arch = remote_process_arch; 587 else 588 remote_arch = remote_host_arch; 589 590 if (!target_arch.IsValid()) 591 { 592 if (remote_arch.IsValid() 593 && remote_arch.GetMachine() == llvm::Triple::arm 594 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 595 m_register_info.HardcodeARMRegisters(from_scratch); 596 } 597 else if (target_arch.GetMachine() == llvm::Triple::arm) 598 { 599 m_register_info.HardcodeARMRegisters(from_scratch); 600 } 601 602 // At this point, we can finalize our register info. 603 m_register_info.Finalize (); 604 } 605 606 Error 607 ProcessGDBRemote::WillLaunch (Module* module) 608 { 609 return WillLaunchOrAttach (); 610 } 611 612 Error 613 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 614 { 615 return WillLaunchOrAttach (); 616 } 617 618 Error 619 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 620 { 621 return WillLaunchOrAttach (); 622 } 623 624 Error 625 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 626 { 627 Error error (WillLaunchOrAttach ()); 628 629 if (error.Fail()) 630 return error; 631 632 error = ConnectToDebugserver (remote_url); 633 634 if (error.Fail()) 635 return error; 636 StartAsyncThread (); 637 638 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 639 if (pid == LLDB_INVALID_PROCESS_ID) 640 { 641 // We don't have a valid process ID, so note that we are connected 642 // and could now request to launch or attach, or get remote process 643 // listings... 644 SetPrivateState (eStateConnected); 645 } 646 else 647 { 648 // We have a valid process 649 SetID (pid); 650 GetThreadList(); 651 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) 652 { 653 if (!m_target.GetArchitecture().IsValid()) 654 { 655 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 656 { 657 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 658 } 659 else 660 { 661 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 662 } 663 } 664 665 const StateType state = SetThreadStopInfo (m_last_stop_packet); 666 if (state == eStateStopped) 667 { 668 SetPrivateState (state); 669 } 670 else 671 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 672 } 673 else 674 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 675 } 676 677 if (error.Success() 678 && !GetTarget().GetArchitecture().IsValid() 679 && m_gdb_comm.GetHostArchitecture().IsValid()) 680 { 681 // Prefer the *process'* architecture over that of the *host*, if available. 682 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 683 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 684 else 685 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 686 } 687 688 return error; 689 } 690 691 Error 692 ProcessGDBRemote::WillLaunchOrAttach () 693 { 694 Error error; 695 m_stdio_communication.Clear (); 696 return error; 697 } 698 699 //---------------------------------------------------------------------- 700 // Process Control 701 //---------------------------------------------------------------------- 702 Error 703 ProcessGDBRemote::DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) 704 { 705 Error error; 706 707 uint32_t launch_flags = launch_info.GetFlags().Get(); 708 const char *stdin_path = NULL; 709 const char *stdout_path = NULL; 710 const char *stderr_path = NULL; 711 const char *working_dir = launch_info.GetWorkingDirectory(); 712 713 const ProcessLaunchInfo::FileAction *file_action; 714 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 715 if (file_action) 716 { 717 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 718 stdin_path = file_action->GetPath(); 719 } 720 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 721 if (file_action) 722 { 723 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 724 stdout_path = file_action->GetPath(); 725 } 726 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 727 if (file_action) 728 { 729 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 730 stderr_path = file_action->GetPath(); 731 } 732 733 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 734 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 735 // ::LogSetLogFile ("/dev/stdout"); 736 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 737 738 ObjectFile * object_file = exe_module->GetObjectFile(); 739 if (object_file) 740 { 741 // Make sure we aren't already connected? 742 if (!m_gdb_comm.IsConnected()) 743 { 744 error = LaunchAndConnectToDebugserver (launch_info); 745 } 746 747 if (error.Success()) 748 { 749 lldb_utility::PseudoTerminal pty; 750 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 751 752 // If the debugserver is local and we aren't disabling STDIO, lets use 753 // a pseudo terminal to instead of relying on the 'O' packets for stdio 754 // since 'O' packets can really slow down debugging if the inferior 755 // does a lot of output. 756 PlatformSP platform_sp (m_target.GetPlatform()); 757 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 758 { 759 const char *slave_name = NULL; 760 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 761 { 762 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 763 slave_name = pty.GetSlaveName (NULL, 0); 764 } 765 if (stdin_path == NULL) 766 stdin_path = slave_name; 767 768 if (stdout_path == NULL) 769 stdout_path = slave_name; 770 771 if (stderr_path == NULL) 772 stderr_path = slave_name; 773 } 774 775 // Set STDIN to /dev/null if we want STDIO disabled or if either 776 // STDOUT or STDERR have been set to something and STDIN hasn't 777 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 778 stdin_path = "/dev/null"; 779 780 // Set STDOUT to /dev/null if we want STDIO disabled or if either 781 // STDIN or STDERR have been set to something and STDOUT hasn't 782 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 783 stdout_path = "/dev/null"; 784 785 // Set STDERR to /dev/null if we want STDIO disabled or if either 786 // STDIN or STDOUT have been set to something and STDERR hasn't 787 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 788 stderr_path = "/dev/null"; 789 790 if (stdin_path) 791 m_gdb_comm.SetSTDIN (stdin_path); 792 if (stdout_path) 793 m_gdb_comm.SetSTDOUT (stdout_path); 794 if (stderr_path) 795 m_gdb_comm.SetSTDERR (stderr_path); 796 797 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 798 799 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 800 801 if (working_dir && working_dir[0]) 802 { 803 m_gdb_comm.SetWorkingDir (working_dir); 804 } 805 806 // Send the environment and the program + arguments after we connect 807 const Args &environment = launch_info.GetEnvironmentEntries(); 808 if (environment.GetArgumentCount()) 809 { 810 size_t num_environment_entries = environment.GetArgumentCount(); 811 for (size_t i=0; i<num_environment_entries; ++i) 812 { 813 const char *env_entry = environment.GetArgumentAtIndex(i); 814 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 815 break; 816 } 817 } 818 819 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 820 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info); 821 if (arg_packet_err == 0) 822 { 823 std::string error_str; 824 if (m_gdb_comm.GetLaunchSuccess (error_str)) 825 { 826 SetID (m_gdb_comm.GetCurrentProcessID ()); 827 } 828 else 829 { 830 error.SetErrorString (error_str.c_str()); 831 } 832 } 833 else 834 { 835 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 836 } 837 838 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 839 840 if (GetID() == LLDB_INVALID_PROCESS_ID) 841 { 842 if (log) 843 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 844 KillDebugserverProcess (); 845 return error; 846 } 847 848 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) 849 { 850 if (!m_target.GetArchitecture().IsValid()) 851 { 852 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 853 { 854 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 855 } 856 else 857 { 858 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 859 } 860 } 861 862 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 863 864 if (!disable_stdio) 865 { 866 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 867 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 868 } 869 } 870 } 871 else 872 { 873 if (log) 874 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 875 } 876 } 877 else 878 { 879 // Set our user ID to an invalid process ID. 880 SetID(LLDB_INVALID_PROCESS_ID); 881 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 882 exe_module->GetFileSpec().GetFilename().AsCString(), 883 exe_module->GetArchitecture().GetArchitectureName()); 884 } 885 return error; 886 887 } 888 889 890 Error 891 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 892 { 893 Error error; 894 // Only connect if we have a valid connect URL 895 896 if (connect_url && connect_url[0]) 897 { 898 std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 899 if (conn_ap.get()) 900 { 901 const uint32_t max_retry_count = 50; 902 uint32_t retry_count = 0; 903 while (!m_gdb_comm.IsConnected()) 904 { 905 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 906 { 907 m_gdb_comm.SetConnection (conn_ap.release()); 908 break; 909 } 910 else if (error.WasInterrupted()) 911 { 912 // If we were interrupted, don't keep retrying. 913 break; 914 } 915 916 retry_count++; 917 918 if (retry_count >= max_retry_count) 919 break; 920 921 usleep (100000); 922 } 923 } 924 } 925 926 if (!m_gdb_comm.IsConnected()) 927 { 928 if (error.Success()) 929 error.SetErrorString("not connected to remote gdb server"); 930 return error; 931 } 932 933 // We always seem to be able to open a connection to a local port 934 // so we need to make sure we can then send data to it. If we can't 935 // then we aren't actually connected to anything, so try and do the 936 // handshake with the remote GDB server and make sure that goes 937 // alright. 938 if (!m_gdb_comm.HandshakeWithServer (&error)) 939 { 940 m_gdb_comm.Disconnect(); 941 if (error.Success()) 942 error.SetErrorString("not connected to remote gdb server"); 943 return error; 944 } 945 m_gdb_comm.GetThreadSuffixSupported (); 946 m_gdb_comm.GetListThreadsInStopReplySupported (); 947 m_gdb_comm.GetHostInfo (); 948 m_gdb_comm.GetVContSupported ('c'); 949 m_gdb_comm.GetVAttachOrWaitSupported(); 950 951 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 952 for (size_t idx = 0; idx < num_cmds; idx++) 953 { 954 StringExtractorGDBRemote response; 955 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 956 } 957 return error; 958 } 959 960 void 961 ProcessGDBRemote::DidLaunchOrAttach () 962 { 963 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 964 if (log) 965 log->Printf ("ProcessGDBRemote::DidLaunch()"); 966 if (GetID() != LLDB_INVALID_PROCESS_ID) 967 { 968 BuildDynamicRegisterInfo (false); 969 970 // See if the GDB server supports the qHostInfo information 971 972 ArchSpec gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 973 974 // See if the GDB server supports the qProcessInfo packet, if so 975 // prefer that over the Host information as it will be more specific 976 // to our process. 977 978 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 979 gdb_remote_arch = m_gdb_comm.GetProcessArchitecture(); 980 981 if (gdb_remote_arch.IsValid()) 982 { 983 ArchSpec &target_arch = GetTarget().GetArchitecture(); 984 985 if (target_arch.IsValid()) 986 { 987 // If the remote host is ARM and we have apple as the vendor, then 988 // ARM executables and shared libraries can have mixed ARM architectures. 989 // You can have an armv6 executable, and if the host is armv7, then the 990 // system will load the best possible architecture for all shared libraries 991 // it has, so we really need to take the remote host architecture as our 992 // defacto architecture in this case. 993 994 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 995 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 996 { 997 target_arch = gdb_remote_arch; 998 } 999 else 1000 { 1001 // Fill in what is missing in the triple 1002 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 1003 llvm::Triple &target_triple = target_arch.GetTriple(); 1004 if (target_triple.getVendorName().size() == 0) 1005 { 1006 target_triple.setVendor (remote_triple.getVendor()); 1007 1008 if (target_triple.getOSName().size() == 0) 1009 { 1010 target_triple.setOS (remote_triple.getOS()); 1011 1012 if (target_triple.getEnvironmentName().size() == 0) 1013 target_triple.setEnvironment (remote_triple.getEnvironment()); 1014 } 1015 } 1016 } 1017 } 1018 else 1019 { 1020 // The target doesn't have a valid architecture yet, set it from 1021 // the architecture we got from the remote GDB server 1022 target_arch = gdb_remote_arch; 1023 } 1024 } 1025 } 1026 } 1027 1028 void 1029 ProcessGDBRemote::DidLaunch () 1030 { 1031 DidLaunchOrAttach (); 1032 } 1033 1034 Error 1035 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 1036 { 1037 ProcessAttachInfo attach_info; 1038 return DoAttachToProcessWithID(attach_pid, attach_info); 1039 } 1040 1041 Error 1042 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 1043 { 1044 Error error; 1045 // Clear out and clean up from any current state 1046 Clear(); 1047 if (attach_pid != LLDB_INVALID_PROCESS_ID) 1048 { 1049 // Make sure we aren't already connected? 1050 if (!m_gdb_comm.IsConnected()) 1051 { 1052 error = LaunchAndConnectToDebugserver (attach_info); 1053 1054 if (error.Fail()) 1055 { 1056 const char *error_string = error.AsCString(); 1057 if (error_string == NULL) 1058 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1059 1060 SetExitStatus (-1, error_string); 1061 } 1062 } 1063 1064 if (error.Success()) 1065 { 1066 char packet[64]; 1067 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 1068 SetID (attach_pid); 1069 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 1070 } 1071 } 1072 return error; 1073 } 1074 1075 Error 1076 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, const ProcessAttachInfo &attach_info) 1077 { 1078 Error error; 1079 // Clear out and clean up from any current state 1080 Clear(); 1081 1082 if (process_name && process_name[0]) 1083 { 1084 // Make sure we aren't already connected? 1085 if (!m_gdb_comm.IsConnected()) 1086 { 1087 error = LaunchAndConnectToDebugserver (attach_info); 1088 1089 if (error.Fail()) 1090 { 1091 const char *error_string = error.AsCString(); 1092 if (error_string == NULL) 1093 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1094 1095 SetExitStatus (-1, error_string); 1096 } 1097 } 1098 1099 if (error.Success()) 1100 { 1101 StreamString packet; 1102 1103 if (attach_info.GetWaitForLaunch()) 1104 { 1105 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1106 { 1107 packet.PutCString ("vAttachWait"); 1108 } 1109 else 1110 { 1111 if (attach_info.GetIgnoreExisting()) 1112 packet.PutCString("vAttachWait"); 1113 else 1114 packet.PutCString ("vAttachOrWait"); 1115 } 1116 } 1117 else 1118 packet.PutCString("vAttachName"); 1119 packet.PutChar(';'); 1120 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1121 1122 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1123 1124 } 1125 } 1126 return error; 1127 } 1128 1129 1130 bool 1131 ProcessGDBRemote::SetExitStatus (int exit_status, const char *cstr) 1132 { 1133 m_gdb_comm.Disconnect(); 1134 return Process::SetExitStatus (exit_status, cstr); 1135 } 1136 1137 void 1138 ProcessGDBRemote::DidAttach () 1139 { 1140 DidLaunchOrAttach (); 1141 } 1142 1143 1144 Error 1145 ProcessGDBRemote::WillResume () 1146 { 1147 m_continue_c_tids.clear(); 1148 m_continue_C_tids.clear(); 1149 m_continue_s_tids.clear(); 1150 m_continue_S_tids.clear(); 1151 return Error(); 1152 } 1153 1154 Error 1155 ProcessGDBRemote::DoResume () 1156 { 1157 Error error; 1158 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1159 if (log) 1160 log->Printf ("ProcessGDBRemote::Resume()"); 1161 1162 Listener listener ("gdb-remote.resume-packet-sent"); 1163 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1164 { 1165 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1166 1167 const size_t num_threads = GetThreadList().GetSize(); 1168 1169 StreamString continue_packet; 1170 bool continue_packet_error = false; 1171 if (m_gdb_comm.HasAnyVContSupport ()) 1172 { 1173 if (m_continue_c_tids.size() == num_threads) 1174 { 1175 // All threads are continuing, just send a "c" packet 1176 continue_packet.PutCString ("c"); 1177 } 1178 else 1179 { 1180 continue_packet.PutCString ("vCont"); 1181 1182 if (!m_continue_c_tids.empty()) 1183 { 1184 if (m_gdb_comm.GetVContSupported ('c')) 1185 { 1186 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) 1187 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1188 } 1189 else 1190 continue_packet_error = true; 1191 } 1192 1193 if (!continue_packet_error && !m_continue_C_tids.empty()) 1194 { 1195 if (m_gdb_comm.GetVContSupported ('C')) 1196 { 1197 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) 1198 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1199 } 1200 else 1201 continue_packet_error = true; 1202 } 1203 1204 if (!continue_packet_error && !m_continue_s_tids.empty()) 1205 { 1206 if (m_gdb_comm.GetVContSupported ('s')) 1207 { 1208 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) 1209 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1210 } 1211 else 1212 continue_packet_error = true; 1213 } 1214 1215 if (!continue_packet_error && !m_continue_S_tids.empty()) 1216 { 1217 if (m_gdb_comm.GetVContSupported ('S')) 1218 { 1219 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) 1220 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1221 } 1222 else 1223 continue_packet_error = true; 1224 } 1225 1226 if (continue_packet_error) 1227 continue_packet.GetString().clear(); 1228 } 1229 } 1230 else 1231 continue_packet_error = true; 1232 1233 if (continue_packet_error) 1234 { 1235 // Either no vCont support, or we tried to use part of the vCont 1236 // packet that wasn't supported by the remote GDB server. 1237 // We need to try and make a simple packet that can do our continue 1238 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1239 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1240 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1241 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1242 if (num_continue_c_tids > 0) 1243 { 1244 if (num_continue_c_tids == num_threads) 1245 { 1246 // All threads are resuming... 1247 m_gdb_comm.SetCurrentThreadForRun (-1); 1248 continue_packet.PutChar ('c'); 1249 continue_packet_error = false; 1250 } 1251 else if (num_continue_c_tids == 1 && 1252 num_continue_C_tids == 0 && 1253 num_continue_s_tids == 0 && 1254 num_continue_S_tids == 0 ) 1255 { 1256 // Only one thread is continuing 1257 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1258 continue_packet.PutChar ('c'); 1259 continue_packet_error = false; 1260 } 1261 } 1262 1263 if (continue_packet_error && num_continue_C_tids > 0) 1264 { 1265 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1266 num_continue_C_tids > 0 && 1267 num_continue_s_tids == 0 && 1268 num_continue_S_tids == 0 ) 1269 { 1270 const int continue_signo = m_continue_C_tids.front().second; 1271 // Only one thread is continuing 1272 if (num_continue_C_tids > 1) 1273 { 1274 // More that one thread with a signal, yet we don't have 1275 // vCont support and we are being asked to resume each 1276 // thread with a signal, we need to make sure they are 1277 // all the same signal, or we can't issue the continue 1278 // accurately with the current support... 1279 if (num_continue_C_tids > 1) 1280 { 1281 continue_packet_error = false; 1282 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1283 { 1284 if (m_continue_C_tids[i].second != continue_signo) 1285 continue_packet_error = true; 1286 } 1287 } 1288 if (!continue_packet_error) 1289 m_gdb_comm.SetCurrentThreadForRun (-1); 1290 } 1291 else 1292 { 1293 // Set the continue thread ID 1294 continue_packet_error = false; 1295 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1296 } 1297 if (!continue_packet_error) 1298 { 1299 // Add threads continuing with the same signo... 1300 continue_packet.Printf("C%2.2x", continue_signo); 1301 } 1302 } 1303 } 1304 1305 if (continue_packet_error && num_continue_s_tids > 0) 1306 { 1307 if (num_continue_s_tids == num_threads) 1308 { 1309 // All threads are resuming... 1310 m_gdb_comm.SetCurrentThreadForRun (-1); 1311 continue_packet.PutChar ('s'); 1312 continue_packet_error = false; 1313 } 1314 else if (num_continue_c_tids == 0 && 1315 num_continue_C_tids == 0 && 1316 num_continue_s_tids == 1 && 1317 num_continue_S_tids == 0 ) 1318 { 1319 // Only one thread is stepping 1320 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1321 continue_packet.PutChar ('s'); 1322 continue_packet_error = false; 1323 } 1324 } 1325 1326 if (!continue_packet_error && num_continue_S_tids > 0) 1327 { 1328 if (num_continue_S_tids == num_threads) 1329 { 1330 const int step_signo = m_continue_S_tids.front().second; 1331 // Are all threads trying to step with the same signal? 1332 continue_packet_error = false; 1333 if (num_continue_S_tids > 1) 1334 { 1335 for (size_t i=1; i<num_threads; ++i) 1336 { 1337 if (m_continue_S_tids[i].second != step_signo) 1338 continue_packet_error = true; 1339 } 1340 } 1341 if (!continue_packet_error) 1342 { 1343 // Add threads stepping with the same signo... 1344 m_gdb_comm.SetCurrentThreadForRun (-1); 1345 continue_packet.Printf("S%2.2x", step_signo); 1346 } 1347 } 1348 else if (num_continue_c_tids == 0 && 1349 num_continue_C_tids == 0 && 1350 num_continue_s_tids == 0 && 1351 num_continue_S_tids == 1 ) 1352 { 1353 // Only one thread is stepping with signal 1354 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1355 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1356 continue_packet_error = false; 1357 } 1358 } 1359 } 1360 1361 if (continue_packet_error) 1362 { 1363 error.SetErrorString ("can't make continue packet for this resume"); 1364 } 1365 else 1366 { 1367 EventSP event_sp; 1368 TimeValue timeout; 1369 timeout = TimeValue::Now(); 1370 timeout.OffsetWithSeconds (5); 1371 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1372 { 1373 error.SetErrorString ("Trying to resume but the async thread is dead."); 1374 if (log) 1375 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1376 return error; 1377 } 1378 1379 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1380 1381 if (listener.WaitForEvent (&timeout, event_sp) == false) 1382 { 1383 error.SetErrorString("Resume timed out."); 1384 if (log) 1385 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1386 } 1387 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1388 { 1389 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1390 if (log) 1391 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1392 return error; 1393 } 1394 } 1395 } 1396 1397 return error; 1398 } 1399 1400 void 1401 ProcessGDBRemote::ClearThreadIDList () 1402 { 1403 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1404 m_thread_ids.clear(); 1405 } 1406 1407 bool 1408 ProcessGDBRemote::UpdateThreadIDList () 1409 { 1410 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1411 bool sequence_mutex_unavailable = false; 1412 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1413 if (sequence_mutex_unavailable) 1414 { 1415 return false; // We just didn't get the list 1416 } 1417 return true; 1418 } 1419 1420 bool 1421 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1422 { 1423 // locker will keep a mutex locked until it goes out of scope 1424 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1425 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1426 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1427 1428 size_t num_thread_ids = m_thread_ids.size(); 1429 // The "m_thread_ids" thread ID list should always be updated after each stop 1430 // reply packet, but in case it isn't, update it here. 1431 if (num_thread_ids == 0) 1432 { 1433 if (!UpdateThreadIDList ()) 1434 return false; 1435 num_thread_ids = m_thread_ids.size(); 1436 } 1437 1438 ThreadList old_thread_list_copy(old_thread_list); 1439 if (num_thread_ids > 0) 1440 { 1441 for (size_t i=0; i<num_thread_ids; ++i) 1442 { 1443 tid_t tid = m_thread_ids[i]; 1444 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1445 if (!thread_sp) 1446 { 1447 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1448 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1449 log->Printf( 1450 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1451 __FUNCTION__, 1452 thread_sp.get(), 1453 thread_sp->GetID()); 1454 } 1455 else 1456 { 1457 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1458 log->Printf( 1459 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1460 __FUNCTION__, 1461 thread_sp.get(), 1462 thread_sp->GetID()); 1463 } 1464 new_thread_list.AddThread(thread_sp); 1465 } 1466 } 1467 1468 // Whatever that is left in old_thread_list_copy are not 1469 // present in new_thread_list. Remove non-existent threads from internal id table. 1470 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1471 for (size_t i=0; i<old_num_thread_ids; i++) 1472 { 1473 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1474 if (old_thread_sp) 1475 { 1476 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1477 m_thread_id_to_index_id_map.erase(old_thread_id); 1478 } 1479 } 1480 1481 return true; 1482 } 1483 1484 1485 StateType 1486 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1487 { 1488 stop_packet.SetFilePos (0); 1489 const char stop_type = stop_packet.GetChar(); 1490 switch (stop_type) 1491 { 1492 case 'T': 1493 case 'S': 1494 { 1495 // This is a bit of a hack, but is is required. If we did exec, we 1496 // need to clear our thread lists and also know to rebuild our dynamic 1497 // register info before we lookup and threads and populate the expedited 1498 // register values so we need to know this right away so we can cleanup 1499 // and update our registers. 1500 const uint32_t stop_id = GetStopID(); 1501 if (stop_id == 0) 1502 { 1503 // Our first stop, make sure we have a process ID, and also make 1504 // sure we know about our registers 1505 if (GetID() == LLDB_INVALID_PROCESS_ID) 1506 { 1507 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1508 if (pid != LLDB_INVALID_PROCESS_ID) 1509 SetID (pid); 1510 } 1511 BuildDynamicRegisterInfo (true); 1512 } 1513 // Stop with signal and thread info 1514 const uint8_t signo = stop_packet.GetHexU8(); 1515 std::string name; 1516 std::string value; 1517 std::string thread_name; 1518 std::string reason; 1519 std::string description; 1520 uint32_t exc_type = 0; 1521 std::vector<addr_t> exc_data; 1522 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1523 ThreadSP thread_sp; 1524 ThreadGDBRemote *gdb_thread = NULL; 1525 1526 while (stop_packet.GetNameColonValue(name, value)) 1527 { 1528 if (name.compare("metype") == 0) 1529 { 1530 // exception type in big endian hex 1531 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1532 } 1533 else if (name.compare("medata") == 0) 1534 { 1535 // exception data in big endian hex 1536 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1537 } 1538 else if (name.compare("thread") == 0) 1539 { 1540 // thread in big endian hex 1541 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1542 // m_thread_list_real does have its own mutex, but we need to 1543 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1544 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1545 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1546 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1547 1548 if (!thread_sp) 1549 { 1550 // Create the thread if we need to 1551 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1552 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1553 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1554 log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1555 __FUNCTION__, 1556 thread_sp.get(), 1557 thread_sp->GetID()); 1558 1559 m_thread_list_real.AddThread(thread_sp); 1560 } 1561 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1562 1563 } 1564 else if (name.compare("threads") == 0) 1565 { 1566 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1567 m_thread_ids.clear(); 1568 // A comma separated list of all threads in the current 1569 // process that includes the thread for this stop reply 1570 // packet 1571 size_t comma_pos; 1572 lldb::tid_t tid; 1573 while ((comma_pos = value.find(',')) != std::string::npos) 1574 { 1575 value[comma_pos] = '\0'; 1576 // thread in big endian hex 1577 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1578 if (tid != LLDB_INVALID_THREAD_ID) 1579 m_thread_ids.push_back (tid); 1580 value.erase(0, comma_pos + 1); 1581 1582 } 1583 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1584 if (tid != LLDB_INVALID_THREAD_ID) 1585 m_thread_ids.push_back (tid); 1586 } 1587 else if (name.compare("hexname") == 0) 1588 { 1589 StringExtractor name_extractor; 1590 // Swap "value" over into "name_extractor" 1591 name_extractor.GetStringRef().swap(value); 1592 // Now convert the HEX bytes into a string value 1593 name_extractor.GetHexByteString (value); 1594 thread_name.swap (value); 1595 } 1596 else if (name.compare("name") == 0) 1597 { 1598 thread_name.swap (value); 1599 } 1600 else if (name.compare("qaddr") == 0) 1601 { 1602 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1603 } 1604 else if (name.compare("reason") == 0) 1605 { 1606 reason.swap(value); 1607 } 1608 else if (name.compare("description") == 0) 1609 { 1610 StringExtractor desc_extractor; 1611 // Swap "value" over into "name_extractor" 1612 desc_extractor.GetStringRef().swap(value); 1613 // Now convert the HEX bytes into a string value 1614 desc_extractor.GetHexByteString (thread_name); 1615 } 1616 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1617 { 1618 // We have a register number that contains an expedited 1619 // register value. Lets supply this register to our thread 1620 // so it won't have to go and read it. 1621 if (gdb_thread) 1622 { 1623 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1624 1625 if (reg != UINT32_MAX) 1626 { 1627 StringExtractor reg_value_extractor; 1628 // Swap "value" over into "reg_value_extractor" 1629 reg_value_extractor.GetStringRef().swap(value); 1630 if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) 1631 { 1632 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1633 name.c_str(), 1634 reg, 1635 reg, 1636 reg_value_extractor.GetStringRef().c_str(), 1637 stop_packet.GetStringRef().c_str()); 1638 } 1639 } 1640 } 1641 } 1642 } 1643 1644 if (thread_sp) 1645 { 1646 // Clear the stop info just in case we don't set it to anything 1647 thread_sp->SetStopInfo (StopInfoSP()); 1648 1649 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1650 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1651 if (exc_type != 0) 1652 { 1653 const size_t exc_data_size = exc_data.size(); 1654 1655 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1656 exc_type, 1657 exc_data_size, 1658 exc_data_size >= 1 ? exc_data[0] : 0, 1659 exc_data_size >= 2 ? exc_data[1] : 0, 1660 exc_data_size >= 3 ? exc_data[2] : 0)); 1661 } 1662 else 1663 { 1664 bool handled = false; 1665 bool did_exec = false; 1666 if (!reason.empty()) 1667 { 1668 if (reason.compare("trace") == 0) 1669 { 1670 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1671 handled = true; 1672 } 1673 else if (reason.compare("breakpoint") == 0) 1674 { 1675 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1676 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1677 if (bp_site_sp) 1678 { 1679 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1680 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1681 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1682 handled = true; 1683 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1684 { 1685 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1686 } 1687 else 1688 { 1689 StopInfoSP invalid_stop_info_sp; 1690 thread_sp->SetStopInfo (invalid_stop_info_sp); 1691 } 1692 } 1693 1694 } 1695 else if (reason.compare("trap") == 0) 1696 { 1697 // Let the trap just use the standard signal stop reason below... 1698 } 1699 else if (reason.compare("watchpoint") == 0) 1700 { 1701 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1702 // TODO: locate the watchpoint somehow... 1703 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1704 handled = true; 1705 } 1706 else if (reason.compare("exception") == 0) 1707 { 1708 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1709 handled = true; 1710 } 1711 else if (reason.compare("exec") == 0) 1712 { 1713 did_exec = true; 1714 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 1715 handled = true; 1716 } 1717 } 1718 1719 if (signo && did_exec == false) 1720 { 1721 if (signo == SIGTRAP) 1722 { 1723 // Currently we are going to assume SIGTRAP means we are either 1724 // hitting a breakpoint or hardware single stepping. 1725 handled = true; 1726 addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; 1727 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1728 1729 if (bp_site_sp) 1730 { 1731 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1732 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1733 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1734 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1735 { 1736 if(m_breakpoint_pc_offset != 0) 1737 thread_sp->GetRegisterContext()->SetPC(pc); 1738 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1739 } 1740 else 1741 { 1742 StopInfoSP invalid_stop_info_sp; 1743 thread_sp->SetStopInfo (invalid_stop_info_sp); 1744 } 1745 } 1746 else 1747 { 1748 // If we were stepping then assume the stop was the result of the trace. If we were 1749 // not stepping then report the SIGTRAP. 1750 // FIXME: We are still missing the case where we single step over a trap instruction. 1751 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 1752 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1753 else 1754 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1755 } 1756 } 1757 if (!handled) 1758 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1759 } 1760 1761 if (!description.empty()) 1762 { 1763 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 1764 if (stop_info_sp) 1765 { 1766 stop_info_sp->SetDescription (description.c_str()); 1767 } 1768 else 1769 { 1770 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1771 } 1772 } 1773 } 1774 } 1775 return eStateStopped; 1776 } 1777 break; 1778 1779 case 'W': 1780 // process exited 1781 return eStateExited; 1782 1783 default: 1784 break; 1785 } 1786 return eStateInvalid; 1787 } 1788 1789 void 1790 ProcessGDBRemote::RefreshStateAfterStop () 1791 { 1792 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1793 m_thread_ids.clear(); 1794 // Set the thread stop info. It might have a "threads" key whose value is 1795 // a list of all thread IDs in the current process, so m_thread_ids might 1796 // get set. 1797 SetThreadStopInfo (m_last_stop_packet); 1798 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1799 if (m_thread_ids.empty()) 1800 { 1801 // No, we need to fetch the thread list manually 1802 UpdateThreadIDList(); 1803 } 1804 1805 // Let all threads recover from stopping and do any clean up based 1806 // on the previous thread state (if any). 1807 m_thread_list_real.RefreshStateAfterStop(); 1808 1809 } 1810 1811 Error 1812 ProcessGDBRemote::DoHalt (bool &caused_stop) 1813 { 1814 Error error; 1815 1816 bool timed_out = false; 1817 Mutex::Locker locker; 1818 1819 if (m_public_state.GetValue() == eStateAttaching) 1820 { 1821 // We are being asked to halt during an attach. We need to just close 1822 // our file handle and debugserver will go away, and we can be done... 1823 m_gdb_comm.Disconnect(); 1824 } 1825 else 1826 { 1827 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1828 { 1829 if (timed_out) 1830 error.SetErrorString("timed out sending interrupt packet"); 1831 else 1832 error.SetErrorString("unknown error sending interrupt packet"); 1833 } 1834 1835 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1836 } 1837 return error; 1838 } 1839 1840 Error 1841 ProcessGDBRemote::DoDetach(bool keep_stopped) 1842 { 1843 Error error; 1844 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1845 if (log) 1846 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 1847 1848 DisableAllBreakpointSites (); 1849 1850 m_thread_list.DiscardThreadPlans(); 1851 1852 error = m_gdb_comm.Detach (keep_stopped); 1853 if (log) 1854 { 1855 if (error.Success()) 1856 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1857 else 1858 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 1859 } 1860 1861 if (!error.Success()) 1862 return error; 1863 1864 // Sleep for one second to let the process get all detached... 1865 StopAsyncThread (); 1866 1867 SetPrivateState (eStateDetached); 1868 ResumePrivateStateThread(); 1869 1870 //KillDebugserverProcess (); 1871 return error; 1872 } 1873 1874 1875 Error 1876 ProcessGDBRemote::DoDestroy () 1877 { 1878 Error error; 1879 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1880 if (log) 1881 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1882 1883 // There is a bug in older iOS debugservers where they don't shut down the process 1884 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1885 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1886 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1887 // destroy it again. 1888 // 1889 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1890 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1891 // the debugservers with this bug are equal. There really should be a better way to test this! 1892 // 1893 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1894 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1895 // just do the straight-forward kill. 1896 // 1897 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1898 // necessary (or helpful) to do any of this. 1899 1900 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1901 { 1902 PlatformSP platform_sp = GetTarget().GetPlatform(); 1903 1904 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1905 if (platform_sp 1906 && platform_sp->GetName() 1907 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 1908 { 1909 if (m_destroy_tried_resuming) 1910 { 1911 if (log) 1912 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1913 } 1914 else 1915 { 1916 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1917 // but we really need it to happen here and it doesn't matter if we do it twice. 1918 m_thread_list.DiscardThreadPlans(); 1919 DisableAllBreakpointSites(); 1920 1921 bool stop_looks_like_crash = false; 1922 ThreadList &threads = GetThreadList(); 1923 1924 { 1925 Mutex::Locker locker(threads.GetMutex()); 1926 1927 size_t num_threads = threads.GetSize(); 1928 for (size_t i = 0; i < num_threads; i++) 1929 { 1930 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1931 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1932 StopReason reason = eStopReasonInvalid; 1933 if (stop_info_sp) 1934 reason = stop_info_sp->GetStopReason(); 1935 if (reason == eStopReasonBreakpoint 1936 || reason == eStopReasonException) 1937 { 1938 if (log) 1939 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 1940 thread_sp->GetProtocolID(), 1941 stop_info_sp->GetDescription()); 1942 stop_looks_like_crash = true; 1943 break; 1944 } 1945 } 1946 } 1947 1948 if (stop_looks_like_crash) 1949 { 1950 if (log) 1951 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1952 m_destroy_tried_resuming = true; 1953 1954 // If we are going to run again before killing, it would be good to suspend all the threads 1955 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1956 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1957 // have to run the risk of letting those threads proceed a bit. 1958 1959 { 1960 Mutex::Locker locker(threads.GetMutex()); 1961 1962 size_t num_threads = threads.GetSize(); 1963 for (size_t i = 0; i < num_threads; i++) 1964 { 1965 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1966 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1967 StopReason reason = eStopReasonInvalid; 1968 if (stop_info_sp) 1969 reason = stop_info_sp->GetStopReason(); 1970 if (reason != eStopReasonBreakpoint 1971 && reason != eStopReasonException) 1972 { 1973 if (log) 1974 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 1975 thread_sp->GetProtocolID()); 1976 thread_sp->SetResumeState(eStateSuspended); 1977 } 1978 } 1979 } 1980 Resume (); 1981 return Destroy(); 1982 } 1983 } 1984 } 1985 } 1986 1987 // Interrupt if our inferior is running... 1988 int exit_status = SIGABRT; 1989 std::string exit_string; 1990 1991 if (m_gdb_comm.IsConnected()) 1992 { 1993 if (m_public_state.GetValue() != eStateAttaching) 1994 { 1995 1996 StringExtractorGDBRemote response; 1997 bool send_async = true; 1998 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 1999 2000 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) 2001 { 2002 char packet_cmd = response.GetChar(0); 2003 2004 if (packet_cmd == 'W' || packet_cmd == 'X') 2005 { 2006 SetLastStopPacket (response); 2007 ClearThreadIDList (); 2008 exit_status = response.GetHexU8(); 2009 } 2010 else 2011 { 2012 if (log) 2013 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2014 exit_string.assign("got unexpected response to k packet: "); 2015 exit_string.append(response.GetStringRef()); 2016 } 2017 } 2018 else 2019 { 2020 if (log) 2021 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2022 exit_string.assign("failed to send the k packet"); 2023 } 2024 2025 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 2026 } 2027 else 2028 { 2029 if (log) 2030 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2031 exit_string.assign ("killed or interrupted while attaching."); 2032 } 2033 } 2034 else 2035 { 2036 // If we missed setting the exit status on the way out, do it here. 2037 // NB set exit status can be called multiple times, the first one sets the status. 2038 exit_string.assign("destroying when not connected to debugserver"); 2039 } 2040 2041 SetExitStatus(exit_status, exit_string.c_str()); 2042 2043 StopAsyncThread (); 2044 KillDebugserverProcess (); 2045 return error; 2046 } 2047 2048 void 2049 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 2050 { 2051 lldb_private::Mutex::Locker locker (m_last_stop_packet_mutex); 2052 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 2053 if (did_exec) 2054 { 2055 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2056 if (log) 2057 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 2058 2059 m_thread_list_real.Clear(); 2060 m_thread_list.Clear(); 2061 BuildDynamicRegisterInfo (true); 2062 m_gdb_comm.ResetDiscoverableSettings(); 2063 } 2064 m_last_stop_packet = response; 2065 } 2066 2067 2068 //------------------------------------------------------------------ 2069 // Process Queries 2070 //------------------------------------------------------------------ 2071 2072 bool 2073 ProcessGDBRemote::IsAlive () 2074 { 2075 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2076 } 2077 2078 addr_t 2079 ProcessGDBRemote::GetImageInfoAddress() 2080 { 2081 return m_gdb_comm.GetShlibInfoAddr(); 2082 } 2083 2084 //------------------------------------------------------------------ 2085 // Process Memory 2086 //------------------------------------------------------------------ 2087 size_t 2088 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2089 { 2090 if (size > m_max_memory_size) 2091 { 2092 // Keep memory read sizes down to a sane limit. This function will be 2093 // called multiple times in order to complete the task by 2094 // lldb_private::Process so it is ok to do this. 2095 size = m_max_memory_size; 2096 } 2097 2098 char packet[64]; 2099 const int packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2100 assert (packet_len + 1 < (int)sizeof(packet)); 2101 StringExtractorGDBRemote response; 2102 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) 2103 { 2104 if (response.IsNormalResponse()) 2105 { 2106 error.Clear(); 2107 return response.GetHexBytes(buf, size, '\xdd'); 2108 } 2109 else if (response.IsErrorResponse()) 2110 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2111 else if (response.IsUnsupportedResponse()) 2112 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2113 else 2114 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2115 } 2116 else 2117 { 2118 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2119 } 2120 return 0; 2121 } 2122 2123 size_t 2124 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2125 { 2126 if (size > m_max_memory_size) 2127 { 2128 // Keep memory read sizes down to a sane limit. This function will be 2129 // called multiple times in order to complete the task by 2130 // lldb_private::Process so it is ok to do this. 2131 size = m_max_memory_size; 2132 } 2133 2134 StreamString packet; 2135 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2136 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2137 StringExtractorGDBRemote response; 2138 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) 2139 { 2140 if (response.IsOKResponse()) 2141 { 2142 error.Clear(); 2143 return size; 2144 } 2145 else if (response.IsErrorResponse()) 2146 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2147 else if (response.IsUnsupportedResponse()) 2148 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2149 else 2150 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2151 } 2152 else 2153 { 2154 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 2155 } 2156 return 0; 2157 } 2158 2159 lldb::addr_t 2160 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2161 { 2162 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2163 2164 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2165 switch (supported) 2166 { 2167 case eLazyBoolCalculate: 2168 case eLazyBoolYes: 2169 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2170 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2171 return allocated_addr; 2172 2173 case eLazyBoolNo: 2174 // Call mmap() to create memory in the inferior.. 2175 unsigned prot = 0; 2176 if (permissions & lldb::ePermissionsReadable) 2177 prot |= eMmapProtRead; 2178 if (permissions & lldb::ePermissionsWritable) 2179 prot |= eMmapProtWrite; 2180 if (permissions & lldb::ePermissionsExecutable) 2181 prot |= eMmapProtExec; 2182 2183 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2184 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2185 m_addr_to_mmap_size[allocated_addr] = size; 2186 else 2187 allocated_addr = LLDB_INVALID_ADDRESS; 2188 break; 2189 } 2190 2191 if (allocated_addr == LLDB_INVALID_ADDRESS) 2192 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2193 else 2194 error.Clear(); 2195 return allocated_addr; 2196 } 2197 2198 Error 2199 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2200 MemoryRegionInfo ®ion_info) 2201 { 2202 2203 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2204 return error; 2205 } 2206 2207 Error 2208 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2209 { 2210 2211 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2212 return error; 2213 } 2214 2215 Error 2216 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2217 { 2218 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2219 return error; 2220 } 2221 2222 Error 2223 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2224 { 2225 Error error; 2226 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2227 2228 switch (supported) 2229 { 2230 case eLazyBoolCalculate: 2231 // We should never be deallocating memory without allocating memory 2232 // first so we should never get eLazyBoolCalculate 2233 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2234 break; 2235 2236 case eLazyBoolYes: 2237 if (!m_gdb_comm.DeallocateMemory (addr)) 2238 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2239 break; 2240 2241 case eLazyBoolNo: 2242 // Call munmap() to deallocate memory in the inferior.. 2243 { 2244 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2245 if (pos != m_addr_to_mmap_size.end() && 2246 InferiorCallMunmap(this, addr, pos->second)) 2247 m_addr_to_mmap_size.erase (pos); 2248 else 2249 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2250 } 2251 break; 2252 } 2253 2254 return error; 2255 } 2256 2257 2258 //------------------------------------------------------------------ 2259 // Process STDIO 2260 //------------------------------------------------------------------ 2261 size_t 2262 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2263 { 2264 if (m_stdio_communication.IsConnected()) 2265 { 2266 ConnectionStatus status; 2267 m_stdio_communication.Write(src, src_len, status, NULL); 2268 } 2269 return 0; 2270 } 2271 2272 Error 2273 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2274 { 2275 Error error; 2276 assert (bp_site != NULL); 2277 2278 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2279 user_id_t site_id = bp_site->GetID(); 2280 const addr_t addr = bp_site->GetLoadAddress(); 2281 if (log) 2282 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2283 2284 if (bp_site->IsEnabled()) 2285 { 2286 if (log) 2287 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2288 return error; 2289 } 2290 else 2291 { 2292 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2293 2294 if (bp_site->HardwareRequired()) 2295 { 2296 // Try and set hardware breakpoint, and if that fails, fall through 2297 // and set a software breakpoint? 2298 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2299 { 2300 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2301 { 2302 bp_site->SetEnabled(true); 2303 bp_site->SetType (BreakpointSite::eHardware); 2304 } 2305 else 2306 { 2307 error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); 2308 } 2309 } 2310 else 2311 { 2312 error.SetErrorString("hardware breakpoints are not supported"); 2313 } 2314 return error; 2315 } 2316 else if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2317 { 2318 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2319 { 2320 bp_site->SetEnabled(true); 2321 bp_site->SetType (BreakpointSite::eExternal); 2322 return error; 2323 } 2324 } 2325 2326 return EnableSoftwareBreakpoint (bp_site); 2327 } 2328 2329 if (log) 2330 { 2331 const char *err_string = error.AsCString(); 2332 log->Printf ("ProcessGDBRemote::EnableBreakpointSite () error for breakpoint at 0x%8.8" PRIx64 ": %s", 2333 bp_site->GetLoadAddress(), 2334 err_string ? err_string : "NULL"); 2335 } 2336 // We shouldn't reach here on a successful breakpoint enable... 2337 if (error.Success()) 2338 error.SetErrorToGenericError(); 2339 return error; 2340 } 2341 2342 Error 2343 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2344 { 2345 Error error; 2346 assert (bp_site != NULL); 2347 addr_t addr = bp_site->GetLoadAddress(); 2348 user_id_t site_id = bp_site->GetID(); 2349 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2350 if (log) 2351 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2352 2353 if (bp_site->IsEnabled()) 2354 { 2355 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2356 2357 BreakpointSite::Type bp_type = bp_site->GetType(); 2358 switch (bp_type) 2359 { 2360 case BreakpointSite::eSoftware: 2361 error = DisableSoftwareBreakpoint (bp_site); 2362 break; 2363 2364 case BreakpointSite::eHardware: 2365 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2366 error.SetErrorToGenericError(); 2367 break; 2368 2369 case BreakpointSite::eExternal: 2370 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2371 error.SetErrorToGenericError(); 2372 break; 2373 } 2374 if (error.Success()) 2375 bp_site->SetEnabled(false); 2376 } 2377 else 2378 { 2379 if (log) 2380 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2381 return error; 2382 } 2383 2384 if (error.Success()) 2385 error.SetErrorToGenericError(); 2386 return error; 2387 } 2388 2389 // Pre-requisite: wp != NULL. 2390 static GDBStoppointType 2391 GetGDBStoppointType (Watchpoint *wp) 2392 { 2393 assert(wp); 2394 bool watch_read = wp->WatchpointRead(); 2395 bool watch_write = wp->WatchpointWrite(); 2396 2397 // watch_read and watch_write cannot both be false. 2398 assert(watch_read || watch_write); 2399 if (watch_read && watch_write) 2400 return eWatchpointReadWrite; 2401 else if (watch_read) 2402 return eWatchpointRead; 2403 else // Must be watch_write, then. 2404 return eWatchpointWrite; 2405 } 2406 2407 Error 2408 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2409 { 2410 Error error; 2411 if (wp) 2412 { 2413 user_id_t watchID = wp->GetID(); 2414 addr_t addr = wp->GetLoadAddress(); 2415 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2416 if (log) 2417 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2418 if (wp->IsEnabled()) 2419 { 2420 if (log) 2421 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2422 return error; 2423 } 2424 2425 GDBStoppointType type = GetGDBStoppointType(wp); 2426 // Pass down an appropriate z/Z packet... 2427 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2428 { 2429 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2430 { 2431 wp->SetEnabled(true, notify); 2432 return error; 2433 } 2434 else 2435 error.SetErrorString("sending gdb watchpoint packet failed"); 2436 } 2437 else 2438 error.SetErrorString("watchpoints not supported"); 2439 } 2440 else 2441 { 2442 error.SetErrorString("Watchpoint argument was NULL."); 2443 } 2444 if (error.Success()) 2445 error.SetErrorToGenericError(); 2446 return error; 2447 } 2448 2449 Error 2450 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2451 { 2452 Error error; 2453 if (wp) 2454 { 2455 user_id_t watchID = wp->GetID(); 2456 2457 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2458 2459 addr_t addr = wp->GetLoadAddress(); 2460 2461 if (log) 2462 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2463 2464 if (!wp->IsEnabled()) 2465 { 2466 if (log) 2467 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2468 // See also 'class WatchpointSentry' within StopInfo.cpp. 2469 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2470 // the watchpoint object to intelligently process this action. 2471 wp->SetEnabled(false, notify); 2472 return error; 2473 } 2474 2475 if (wp->IsHardware()) 2476 { 2477 GDBStoppointType type = GetGDBStoppointType(wp); 2478 // Pass down an appropriate z/Z packet... 2479 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2480 { 2481 wp->SetEnabled(false, notify); 2482 return error; 2483 } 2484 else 2485 error.SetErrorString("sending gdb watchpoint packet failed"); 2486 } 2487 // TODO: clear software watchpoints if we implement them 2488 } 2489 else 2490 { 2491 error.SetErrorString("Watchpoint argument was NULL."); 2492 } 2493 if (error.Success()) 2494 error.SetErrorToGenericError(); 2495 return error; 2496 } 2497 2498 void 2499 ProcessGDBRemote::Clear() 2500 { 2501 m_flags = 0; 2502 m_thread_list_real.Clear(); 2503 m_thread_list.Clear(); 2504 } 2505 2506 Error 2507 ProcessGDBRemote::DoSignal (int signo) 2508 { 2509 Error error; 2510 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2511 if (log) 2512 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2513 2514 if (!m_gdb_comm.SendAsyncSignal (signo)) 2515 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2516 return error; 2517 } 2518 2519 Error 2520 ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) 2521 { 2522 Error error; 2523 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2524 { 2525 // If we locate debugserver, keep that located version around 2526 static FileSpec g_debugserver_file_spec; 2527 2528 ProcessLaunchInfo debugserver_launch_info; 2529 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2530 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2531 2532 #if defined (__APPLE__) && defined (__arm__) 2533 // On iOS, still do a local connection using a random port 2534 const char *hostname = "localhost"; 2535 uint16_t port = get_random_port (); 2536 #else 2537 // Set hostname being NULL to do the reverse connect where debugserver 2538 // will bind to port zero and it will communicate back to us the port 2539 // that we will connect to 2540 const char *hostname = NULL; 2541 uint16_t port = 0; 2542 #endif 2543 2544 error = m_gdb_comm.StartDebugserverProcess (hostname, 2545 port, 2546 debugserver_launch_info, 2547 port); 2548 2549 if (error.Success ()) 2550 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2551 else 2552 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2553 2554 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2555 StartAsyncThread (); 2556 2557 if (error.Fail()) 2558 { 2559 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2560 2561 if (log) 2562 log->Printf("failed to start debugserver process: %s", error.AsCString()); 2563 return error; 2564 } 2565 2566 if (m_gdb_comm.IsConnected()) 2567 { 2568 // Finish the connection process by doing the handshake without connecting (send NULL URL) 2569 ConnectToDebugserver (NULL); 2570 } 2571 else 2572 { 2573 StreamString connect_url; 2574 connect_url.Printf("connect://%s:%u", hostname, port); 2575 error = ConnectToDebugserver (connect_url.GetString().c_str()); 2576 } 2577 2578 } 2579 return error; 2580 } 2581 2582 bool 2583 ProcessGDBRemote::MonitorDebugserverProcess 2584 ( 2585 void *callback_baton, 2586 lldb::pid_t debugserver_pid, 2587 bool exited, // True if the process did exit 2588 int signo, // Zero for no signal 2589 int exit_status // Exit value of process if signal is zero 2590 ) 2591 { 2592 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2593 // and might not exist anymore, so we need to carefully try to get the 2594 // target for this process first since we have a race condition when 2595 // we are done running between getting the notice that the inferior 2596 // process has died and the debugserver that was debugging this process. 2597 // In our test suite, we are also continually running process after 2598 // process, so we must be very careful to make sure: 2599 // 1 - process object hasn't been deleted already 2600 // 2 - that a new process object hasn't been recreated in its place 2601 2602 // "debugserver_pid" argument passed in is the process ID for 2603 // debugserver that we are tracking... 2604 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2605 2606 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2607 2608 // Get a shared pointer to the target that has a matching process pointer. 2609 // This target could be gone, or the target could already have a new process 2610 // object inside of it 2611 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2612 2613 if (log) 2614 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2615 2616 if (target_sp) 2617 { 2618 // We found a process in a target that matches, but another thread 2619 // might be in the process of launching a new process that will 2620 // soon replace it, so get a shared pointer to the process so we 2621 // can keep it alive. 2622 ProcessSP process_sp (target_sp->GetProcessSP()); 2623 // Now we have a shared pointer to the process that can't go away on us 2624 // so we now make sure it was the same as the one passed in, and also make 2625 // sure that our previous "process *" didn't get deleted and have a new 2626 // "process *" created in its place with the same pointer. To verify this 2627 // we make sure the process has our debugserver process ID. If we pass all 2628 // of these tests, then we are sure that this process is the one we were 2629 // looking for. 2630 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2631 { 2632 // Sleep for a half a second to make sure our inferior process has 2633 // time to set its exit status before we set it incorrectly when 2634 // both the debugserver and the inferior process shut down. 2635 usleep (500000); 2636 // If our process hasn't yet exited, debugserver might have died. 2637 // If the process did exit, the we are reaping it. 2638 const StateType state = process->GetState(); 2639 2640 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2641 state != eStateInvalid && 2642 state != eStateUnloaded && 2643 state != eStateExited && 2644 state != eStateDetached) 2645 { 2646 char error_str[1024]; 2647 if (signo) 2648 { 2649 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2650 if (signal_cstr) 2651 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2652 else 2653 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2654 } 2655 else 2656 { 2657 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2658 } 2659 2660 process->SetExitStatus (-1, error_str); 2661 } 2662 // Debugserver has exited we need to let our ProcessGDBRemote 2663 // know that it no longer has a debugserver instance 2664 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2665 } 2666 } 2667 return true; 2668 } 2669 2670 void 2671 ProcessGDBRemote::KillDebugserverProcess () 2672 { 2673 m_gdb_comm.Disconnect(); 2674 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2675 { 2676 Host::Kill (m_debugserver_pid, SIGINT); 2677 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2678 } 2679 } 2680 2681 void 2682 ProcessGDBRemote::Initialize() 2683 { 2684 static bool g_initialized = false; 2685 2686 if (g_initialized == false) 2687 { 2688 g_initialized = true; 2689 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2690 GetPluginDescriptionStatic(), 2691 CreateInstance, 2692 DebuggerInitialize); 2693 2694 Log::Callbacks log_callbacks = { 2695 ProcessGDBRemoteLog::DisableLog, 2696 ProcessGDBRemoteLog::EnableLog, 2697 ProcessGDBRemoteLog::ListLogCategories 2698 }; 2699 2700 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2701 } 2702 } 2703 2704 void 2705 ProcessGDBRemote::DebuggerInitialize (lldb_private::Debugger &debugger) 2706 { 2707 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 2708 { 2709 const bool is_global_setting = true; 2710 PluginManager::CreateSettingForProcessPlugin (debugger, 2711 GetGlobalPluginProperties()->GetValueProperties(), 2712 ConstString ("Properties for the gdb-remote process plug-in."), 2713 is_global_setting); 2714 } 2715 } 2716 2717 bool 2718 ProcessGDBRemote::StartAsyncThread () 2719 { 2720 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2721 2722 if (log) 2723 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2724 2725 Mutex::Locker start_locker(m_async_thread_state_mutex); 2726 if (m_async_thread_state == eAsyncThreadNotStarted) 2727 { 2728 // Create a thread that watches our internal state and controls which 2729 // events make it to clients (into the DCProcess event queue). 2730 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2731 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2732 { 2733 m_async_thread_state = eAsyncThreadRunning; 2734 return true; 2735 } 2736 else 2737 return false; 2738 } 2739 else 2740 { 2741 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2742 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2743 if (log) 2744 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2745 if (m_async_thread_state == eAsyncThreadRunning) 2746 return true; 2747 else 2748 return false; 2749 } 2750 } 2751 2752 void 2753 ProcessGDBRemote::StopAsyncThread () 2754 { 2755 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2756 2757 if (log) 2758 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2759 2760 Mutex::Locker start_locker(m_async_thread_state_mutex); 2761 if (m_async_thread_state == eAsyncThreadRunning) 2762 { 2763 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2764 2765 // This will shut down the async thread. 2766 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2767 2768 // Stop the stdio thread 2769 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2770 { 2771 Host::ThreadJoin (m_async_thread, NULL, NULL); 2772 } 2773 m_async_thread_state = eAsyncThreadDone; 2774 } 2775 else 2776 { 2777 if (log) 2778 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2779 } 2780 } 2781 2782 2783 thread_result_t 2784 ProcessGDBRemote::AsyncThread (void *arg) 2785 { 2786 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2787 2788 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2789 if (log) 2790 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2791 2792 Listener listener ("ProcessGDBRemote::AsyncThread"); 2793 EventSP event_sp; 2794 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2795 eBroadcastBitAsyncThreadShouldExit; 2796 2797 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2798 { 2799 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2800 2801 bool done = false; 2802 while (!done) 2803 { 2804 if (log) 2805 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2806 if (listener.WaitForEvent (NULL, event_sp)) 2807 { 2808 const uint32_t event_type = event_sp->GetType(); 2809 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2810 { 2811 if (log) 2812 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2813 2814 switch (event_type) 2815 { 2816 case eBroadcastBitAsyncContinue: 2817 { 2818 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2819 2820 if (continue_packet) 2821 { 2822 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2823 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2824 if (log) 2825 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2826 2827 if (::strstr (continue_cstr, "vAttach") == NULL) 2828 process->SetPrivateState(eStateRunning); 2829 StringExtractorGDBRemote response; 2830 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2831 2832 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2833 // The thread ID list might be contained within the "response", or the stop reply packet that 2834 // caused the stop. So clear it now before we give the stop reply packet to the process 2835 // using the process->SetLastStopPacket()... 2836 process->ClearThreadIDList (); 2837 2838 switch (stop_state) 2839 { 2840 case eStateStopped: 2841 case eStateCrashed: 2842 case eStateSuspended: 2843 process->SetLastStopPacket (response); 2844 process->SetPrivateState (stop_state); 2845 break; 2846 2847 case eStateExited: 2848 process->SetLastStopPacket (response); 2849 process->ClearThreadIDList(); 2850 response.SetFilePos(1); 2851 process->SetExitStatus(response.GetHexU8(), NULL); 2852 done = true; 2853 break; 2854 2855 case eStateInvalid: 2856 process->SetExitStatus(-1, "lost connection"); 2857 break; 2858 2859 default: 2860 process->SetPrivateState (stop_state); 2861 break; 2862 } 2863 } 2864 } 2865 break; 2866 2867 case eBroadcastBitAsyncThreadShouldExit: 2868 if (log) 2869 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2870 done = true; 2871 break; 2872 2873 default: 2874 if (log) 2875 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2876 done = true; 2877 break; 2878 } 2879 } 2880 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2881 { 2882 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2883 { 2884 process->SetExitStatus (-1, "lost connection"); 2885 done = true; 2886 } 2887 } 2888 } 2889 else 2890 { 2891 if (log) 2892 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2893 done = true; 2894 } 2895 } 2896 } 2897 2898 if (log) 2899 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 2900 2901 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2902 return NULL; 2903 } 2904 2905 //uint32_t 2906 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2907 //{ 2908 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2909 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2910 // if (m_local_debugserver) 2911 // { 2912 // return Host::ListProcessesMatchingName (name, matches, pids); 2913 // } 2914 // else 2915 // { 2916 // // FIXME: Implement talking to the remote debugserver. 2917 // return 0; 2918 // } 2919 // 2920 //} 2921 // 2922 bool 2923 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2924 lldb_private::StoppointCallbackContext *context, 2925 lldb::user_id_t break_id, 2926 lldb::user_id_t break_loc_id) 2927 { 2928 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2929 // run so I can stop it if that's what I want to do. 2930 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2931 if (log) 2932 log->Printf("Hit New Thread Notification breakpoint."); 2933 return false; 2934 } 2935 2936 2937 bool 2938 ProcessGDBRemote::StartNoticingNewThreads() 2939 { 2940 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2941 if (m_thread_create_bp_sp) 2942 { 2943 if (log && log->GetVerbose()) 2944 log->Printf("Enabled noticing new thread breakpoint."); 2945 m_thread_create_bp_sp->SetEnabled(true); 2946 } 2947 else 2948 { 2949 PlatformSP platform_sp (m_target.GetPlatform()); 2950 if (platform_sp) 2951 { 2952 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2953 if (m_thread_create_bp_sp) 2954 { 2955 if (log && log->GetVerbose()) 2956 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2957 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2958 } 2959 else 2960 { 2961 if (log) 2962 log->Printf("Failed to create new thread notification breakpoint."); 2963 } 2964 } 2965 } 2966 return m_thread_create_bp_sp.get() != NULL; 2967 } 2968 2969 bool 2970 ProcessGDBRemote::StopNoticingNewThreads() 2971 { 2972 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2973 if (log && log->GetVerbose()) 2974 log->Printf ("Disabling new thread notification breakpoint."); 2975 2976 if (m_thread_create_bp_sp) 2977 m_thread_create_bp_sp->SetEnabled(false); 2978 2979 return true; 2980 } 2981 2982 lldb_private::DynamicLoader * 2983 ProcessGDBRemote::GetDynamicLoader () 2984 { 2985 if (m_dyld_ap.get() == NULL) 2986 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 2987 return m_dyld_ap.get(); 2988 } 2989 2990 2991 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 2992 { 2993 private: 2994 2995 public: 2996 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 2997 CommandObjectParsed (interpreter, 2998 "process plugin packet history", 2999 "Dumps the packet history buffer. ", 3000 NULL) 3001 { 3002 } 3003 3004 ~CommandObjectProcessGDBRemotePacketHistory () 3005 { 3006 } 3007 3008 bool 3009 DoExecute (Args& command, CommandReturnObject &result) 3010 { 3011 const size_t argc = command.GetArgumentCount(); 3012 if (argc == 0) 3013 { 3014 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3015 if (process) 3016 { 3017 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3018 result.SetStatus (eReturnStatusSuccessFinishResult); 3019 return true; 3020 } 3021 } 3022 else 3023 { 3024 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3025 } 3026 result.SetStatus (eReturnStatusFailed); 3027 return false; 3028 } 3029 }; 3030 3031 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3032 { 3033 private: 3034 3035 public: 3036 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3037 CommandObjectParsed (interpreter, 3038 "process plugin packet send", 3039 "Send a custom packet through the GDB remote protocol and print the answer. " 3040 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3041 NULL) 3042 { 3043 } 3044 3045 ~CommandObjectProcessGDBRemotePacketSend () 3046 { 3047 } 3048 3049 bool 3050 DoExecute (Args& command, CommandReturnObject &result) 3051 { 3052 const size_t argc = command.GetArgumentCount(); 3053 if (argc == 0) 3054 { 3055 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3056 result.SetStatus (eReturnStatusFailed); 3057 return false; 3058 } 3059 3060 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3061 if (process) 3062 { 3063 for (size_t i=0; i<argc; ++ i) 3064 { 3065 const char *packet_cstr = command.GetArgumentAtIndex(0); 3066 bool send_async = true; 3067 StringExtractorGDBRemote response; 3068 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3069 result.SetStatus (eReturnStatusSuccessFinishResult); 3070 Stream &output_strm = result.GetOutputStream(); 3071 output_strm.Printf (" packet: %s\n", packet_cstr); 3072 std::string &response_str = response.GetStringRef(); 3073 3074 if (strstr(packet_cstr, "qGetProfileData") != NULL) 3075 { 3076 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3077 } 3078 3079 if (response_str.empty()) 3080 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3081 else 3082 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3083 } 3084 } 3085 return true; 3086 } 3087 }; 3088 3089 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3090 { 3091 private: 3092 3093 public: 3094 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3095 CommandObjectRaw (interpreter, 3096 "process plugin packet monitor", 3097 "Send a qRcmd packet through the GDB remote protocol and print the response." 3098 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3099 NULL) 3100 { 3101 } 3102 3103 ~CommandObjectProcessGDBRemotePacketMonitor () 3104 { 3105 } 3106 3107 bool 3108 DoExecute (const char *command, CommandReturnObject &result) 3109 { 3110 if (command == NULL || command[0] == '\0') 3111 { 3112 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3113 result.SetStatus (eReturnStatusFailed); 3114 return false; 3115 } 3116 3117 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3118 if (process) 3119 { 3120 StreamString packet; 3121 packet.PutCString("qRcmd,"); 3122 packet.PutBytesAsRawHex8(command, strlen(command)); 3123 const char *packet_cstr = packet.GetString().c_str(); 3124 3125 bool send_async = true; 3126 StringExtractorGDBRemote response; 3127 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3128 result.SetStatus (eReturnStatusSuccessFinishResult); 3129 Stream &output_strm = result.GetOutputStream(); 3130 output_strm.Printf (" packet: %s\n", packet_cstr); 3131 const std::string &response_str = response.GetStringRef(); 3132 3133 if (response_str.empty()) 3134 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3135 else 3136 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3137 } 3138 return true; 3139 } 3140 }; 3141 3142 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3143 { 3144 private: 3145 3146 public: 3147 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3148 CommandObjectMultiword (interpreter, 3149 "process plugin packet", 3150 "Commands that deal with GDB remote packets.", 3151 NULL) 3152 { 3153 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3154 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3155 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3156 } 3157 3158 ~CommandObjectProcessGDBRemotePacket () 3159 { 3160 } 3161 }; 3162 3163 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3164 { 3165 public: 3166 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3167 CommandObjectMultiword (interpreter, 3168 "process plugin", 3169 "A set of commands for operating on a ProcessGDBRemote process.", 3170 "process plugin <subcommand> [<subcommand-options>]") 3171 { 3172 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3173 } 3174 3175 ~CommandObjectMultiwordProcessGDBRemote () 3176 { 3177 } 3178 }; 3179 3180 CommandObject * 3181 ProcessGDBRemote::GetPluginCommandObject() 3182 { 3183 if (!m_command_sp) 3184 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3185 return m_command_sp.get(); 3186 } 3187