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 (m_continue_c_tids.empty() && 1175 m_continue_C_tids.empty() && 1176 m_continue_s_tids.empty() && 1177 m_continue_S_tids.empty())) 1178 { 1179 // All threads are continuing, just send a "c" packet 1180 continue_packet.PutCString ("c"); 1181 } 1182 else 1183 { 1184 continue_packet.PutCString ("vCont"); 1185 1186 if (!m_continue_c_tids.empty()) 1187 { 1188 if (m_gdb_comm.GetVContSupported ('c')) 1189 { 1190 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) 1191 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1192 } 1193 else 1194 continue_packet_error = true; 1195 } 1196 1197 if (!continue_packet_error && !m_continue_C_tids.empty()) 1198 { 1199 if (m_gdb_comm.GetVContSupported ('C')) 1200 { 1201 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) 1202 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1203 } 1204 else 1205 continue_packet_error = true; 1206 } 1207 1208 if (!continue_packet_error && !m_continue_s_tids.empty()) 1209 { 1210 if (m_gdb_comm.GetVContSupported ('s')) 1211 { 1212 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) 1213 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1214 } 1215 else 1216 continue_packet_error = true; 1217 } 1218 1219 if (!continue_packet_error && !m_continue_S_tids.empty()) 1220 { 1221 if (m_gdb_comm.GetVContSupported ('S')) 1222 { 1223 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) 1224 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1225 } 1226 else 1227 continue_packet_error = true; 1228 } 1229 1230 if (continue_packet_error) 1231 continue_packet.GetString().clear(); 1232 } 1233 } 1234 else 1235 continue_packet_error = true; 1236 1237 if (continue_packet_error) 1238 { 1239 // Either no vCont support, or we tried to use part of the vCont 1240 // packet that wasn't supported by the remote GDB server. 1241 // We need to try and make a simple packet that can do our continue 1242 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1243 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1244 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1245 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1246 if (num_continue_c_tids > 0) 1247 { 1248 if (num_continue_c_tids == num_threads) 1249 { 1250 // All threads are resuming... 1251 m_gdb_comm.SetCurrentThreadForRun (-1); 1252 continue_packet.PutChar ('c'); 1253 continue_packet_error = false; 1254 } 1255 else if (num_continue_c_tids == 1 && 1256 num_continue_C_tids == 0 && 1257 num_continue_s_tids == 0 && 1258 num_continue_S_tids == 0 ) 1259 { 1260 // Only one thread is continuing 1261 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1262 continue_packet.PutChar ('c'); 1263 continue_packet_error = false; 1264 } 1265 } 1266 1267 if (continue_packet_error && num_continue_C_tids > 0) 1268 { 1269 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1270 num_continue_C_tids > 0 && 1271 num_continue_s_tids == 0 && 1272 num_continue_S_tids == 0 ) 1273 { 1274 const int continue_signo = m_continue_C_tids.front().second; 1275 // Only one thread is continuing 1276 if (num_continue_C_tids > 1) 1277 { 1278 // More that one thread with a signal, yet we don't have 1279 // vCont support and we are being asked to resume each 1280 // thread with a signal, we need to make sure they are 1281 // all the same signal, or we can't issue the continue 1282 // accurately with the current support... 1283 if (num_continue_C_tids > 1) 1284 { 1285 continue_packet_error = false; 1286 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1287 { 1288 if (m_continue_C_tids[i].second != continue_signo) 1289 continue_packet_error = true; 1290 } 1291 } 1292 if (!continue_packet_error) 1293 m_gdb_comm.SetCurrentThreadForRun (-1); 1294 } 1295 else 1296 { 1297 // Set the continue thread ID 1298 continue_packet_error = false; 1299 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1300 } 1301 if (!continue_packet_error) 1302 { 1303 // Add threads continuing with the same signo... 1304 continue_packet.Printf("C%2.2x", continue_signo); 1305 } 1306 } 1307 } 1308 1309 if (continue_packet_error && num_continue_s_tids > 0) 1310 { 1311 if (num_continue_s_tids == num_threads) 1312 { 1313 // All threads are resuming... 1314 m_gdb_comm.SetCurrentThreadForRun (-1); 1315 continue_packet.PutChar ('s'); 1316 continue_packet_error = false; 1317 } 1318 else if (num_continue_c_tids == 0 && 1319 num_continue_C_tids == 0 && 1320 num_continue_s_tids == 1 && 1321 num_continue_S_tids == 0 ) 1322 { 1323 // Only one thread is stepping 1324 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1325 continue_packet.PutChar ('s'); 1326 continue_packet_error = false; 1327 } 1328 } 1329 1330 if (!continue_packet_error && num_continue_S_tids > 0) 1331 { 1332 if (num_continue_S_tids == num_threads) 1333 { 1334 const int step_signo = m_continue_S_tids.front().second; 1335 // Are all threads trying to step with the same signal? 1336 continue_packet_error = false; 1337 if (num_continue_S_tids > 1) 1338 { 1339 for (size_t i=1; i<num_threads; ++i) 1340 { 1341 if (m_continue_S_tids[i].second != step_signo) 1342 continue_packet_error = true; 1343 } 1344 } 1345 if (!continue_packet_error) 1346 { 1347 // Add threads stepping with the same signo... 1348 m_gdb_comm.SetCurrentThreadForRun (-1); 1349 continue_packet.Printf("S%2.2x", step_signo); 1350 } 1351 } 1352 else if (num_continue_c_tids == 0 && 1353 num_continue_C_tids == 0 && 1354 num_continue_s_tids == 0 && 1355 num_continue_S_tids == 1 ) 1356 { 1357 // Only one thread is stepping with signal 1358 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1359 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1360 continue_packet_error = false; 1361 } 1362 } 1363 } 1364 1365 if (continue_packet_error) 1366 { 1367 error.SetErrorString ("can't make continue packet for this resume"); 1368 } 1369 else 1370 { 1371 EventSP event_sp; 1372 TimeValue timeout; 1373 timeout = TimeValue::Now(); 1374 timeout.OffsetWithSeconds (5); 1375 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1376 { 1377 error.SetErrorString ("Trying to resume but the async thread is dead."); 1378 if (log) 1379 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1380 return error; 1381 } 1382 1383 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1384 1385 if (listener.WaitForEvent (&timeout, event_sp) == false) 1386 { 1387 error.SetErrorString("Resume timed out."); 1388 if (log) 1389 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1390 } 1391 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1392 { 1393 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1394 if (log) 1395 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1396 return error; 1397 } 1398 } 1399 } 1400 1401 return error; 1402 } 1403 1404 void 1405 ProcessGDBRemote::ClearThreadIDList () 1406 { 1407 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1408 m_thread_ids.clear(); 1409 } 1410 1411 bool 1412 ProcessGDBRemote::UpdateThreadIDList () 1413 { 1414 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1415 bool sequence_mutex_unavailable = false; 1416 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1417 if (sequence_mutex_unavailable) 1418 { 1419 return false; // We just didn't get the list 1420 } 1421 return true; 1422 } 1423 1424 bool 1425 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1426 { 1427 // locker will keep a mutex locked until it goes out of scope 1428 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1429 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1430 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1431 1432 size_t num_thread_ids = m_thread_ids.size(); 1433 // The "m_thread_ids" thread ID list should always be updated after each stop 1434 // reply packet, but in case it isn't, update it here. 1435 if (num_thread_ids == 0) 1436 { 1437 if (!UpdateThreadIDList ()) 1438 return false; 1439 num_thread_ids = m_thread_ids.size(); 1440 } 1441 1442 ThreadList old_thread_list_copy(old_thread_list); 1443 if (num_thread_ids > 0) 1444 { 1445 for (size_t i=0; i<num_thread_ids; ++i) 1446 { 1447 tid_t tid = m_thread_ids[i]; 1448 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1449 if (!thread_sp) 1450 { 1451 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1452 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1453 log->Printf( 1454 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1455 __FUNCTION__, 1456 thread_sp.get(), 1457 thread_sp->GetID()); 1458 } 1459 else 1460 { 1461 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1462 log->Printf( 1463 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1464 __FUNCTION__, 1465 thread_sp.get(), 1466 thread_sp->GetID()); 1467 } 1468 new_thread_list.AddThread(thread_sp); 1469 } 1470 } 1471 1472 // Whatever that is left in old_thread_list_copy are not 1473 // present in new_thread_list. Remove non-existent threads from internal id table. 1474 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1475 for (size_t i=0; i<old_num_thread_ids; i++) 1476 { 1477 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1478 if (old_thread_sp) 1479 { 1480 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1481 m_thread_id_to_index_id_map.erase(old_thread_id); 1482 } 1483 } 1484 1485 return true; 1486 } 1487 1488 1489 StateType 1490 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1491 { 1492 stop_packet.SetFilePos (0); 1493 const char stop_type = stop_packet.GetChar(); 1494 switch (stop_type) 1495 { 1496 case 'T': 1497 case 'S': 1498 { 1499 // This is a bit of a hack, but is is required. If we did exec, we 1500 // need to clear our thread lists and also know to rebuild our dynamic 1501 // register info before we lookup and threads and populate the expedited 1502 // register values so we need to know this right away so we can cleanup 1503 // and update our registers. 1504 const uint32_t stop_id = GetStopID(); 1505 if (stop_id == 0) 1506 { 1507 // Our first stop, make sure we have a process ID, and also make 1508 // sure we know about our registers 1509 if (GetID() == LLDB_INVALID_PROCESS_ID) 1510 { 1511 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1512 if (pid != LLDB_INVALID_PROCESS_ID) 1513 SetID (pid); 1514 } 1515 BuildDynamicRegisterInfo (true); 1516 } 1517 // Stop with signal and thread info 1518 const uint8_t signo = stop_packet.GetHexU8(); 1519 std::string name; 1520 std::string value; 1521 std::string thread_name; 1522 std::string reason; 1523 std::string description; 1524 uint32_t exc_type = 0; 1525 std::vector<addr_t> exc_data; 1526 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1527 ThreadSP thread_sp; 1528 ThreadGDBRemote *gdb_thread = NULL; 1529 1530 while (stop_packet.GetNameColonValue(name, value)) 1531 { 1532 if (name.compare("metype") == 0) 1533 { 1534 // exception type in big endian hex 1535 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1536 } 1537 else if (name.compare("medata") == 0) 1538 { 1539 // exception data in big endian hex 1540 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1541 } 1542 else if (name.compare("thread") == 0) 1543 { 1544 // thread in big endian hex 1545 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1546 // m_thread_list_real does have its own mutex, but we need to 1547 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1548 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1549 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1550 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1551 1552 if (!thread_sp) 1553 { 1554 // Create the thread if we need to 1555 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1556 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1557 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1558 log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1559 __FUNCTION__, 1560 thread_sp.get(), 1561 thread_sp->GetID()); 1562 1563 m_thread_list_real.AddThread(thread_sp); 1564 } 1565 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1566 1567 } 1568 else if (name.compare("threads") == 0) 1569 { 1570 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1571 m_thread_ids.clear(); 1572 // A comma separated list of all threads in the current 1573 // process that includes the thread for this stop reply 1574 // packet 1575 size_t comma_pos; 1576 lldb::tid_t tid; 1577 while ((comma_pos = value.find(',')) != std::string::npos) 1578 { 1579 value[comma_pos] = '\0'; 1580 // thread in big endian hex 1581 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1582 if (tid != LLDB_INVALID_THREAD_ID) 1583 m_thread_ids.push_back (tid); 1584 value.erase(0, comma_pos + 1); 1585 1586 } 1587 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1588 if (tid != LLDB_INVALID_THREAD_ID) 1589 m_thread_ids.push_back (tid); 1590 } 1591 else if (name.compare("hexname") == 0) 1592 { 1593 StringExtractor name_extractor; 1594 // Swap "value" over into "name_extractor" 1595 name_extractor.GetStringRef().swap(value); 1596 // Now convert the HEX bytes into a string value 1597 name_extractor.GetHexByteString (value); 1598 thread_name.swap (value); 1599 } 1600 else if (name.compare("name") == 0) 1601 { 1602 thread_name.swap (value); 1603 } 1604 else if (name.compare("qaddr") == 0) 1605 { 1606 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1607 } 1608 else if (name.compare("reason") == 0) 1609 { 1610 reason.swap(value); 1611 } 1612 else if (name.compare("description") == 0) 1613 { 1614 StringExtractor desc_extractor; 1615 // Swap "value" over into "name_extractor" 1616 desc_extractor.GetStringRef().swap(value); 1617 // Now convert the HEX bytes into a string value 1618 desc_extractor.GetHexByteString (thread_name); 1619 } 1620 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1621 { 1622 // We have a register number that contains an expedited 1623 // register value. Lets supply this register to our thread 1624 // so it won't have to go and read it. 1625 if (gdb_thread) 1626 { 1627 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1628 1629 if (reg != UINT32_MAX) 1630 { 1631 StringExtractor reg_value_extractor; 1632 // Swap "value" over into "reg_value_extractor" 1633 reg_value_extractor.GetStringRef().swap(value); 1634 if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) 1635 { 1636 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1637 name.c_str(), 1638 reg, 1639 reg, 1640 reg_value_extractor.GetStringRef().c_str(), 1641 stop_packet.GetStringRef().c_str()); 1642 } 1643 } 1644 } 1645 } 1646 } 1647 1648 if (thread_sp) 1649 { 1650 // Clear the stop info just in case we don't set it to anything 1651 thread_sp->SetStopInfo (StopInfoSP()); 1652 1653 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1654 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1655 if (exc_type != 0) 1656 { 1657 const size_t exc_data_size = exc_data.size(); 1658 1659 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1660 exc_type, 1661 exc_data_size, 1662 exc_data_size >= 1 ? exc_data[0] : 0, 1663 exc_data_size >= 2 ? exc_data[1] : 0, 1664 exc_data_size >= 3 ? exc_data[2] : 0)); 1665 } 1666 else 1667 { 1668 bool handled = false; 1669 bool did_exec = false; 1670 if (!reason.empty()) 1671 { 1672 if (reason.compare("trace") == 0) 1673 { 1674 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1675 handled = true; 1676 } 1677 else if (reason.compare("breakpoint") == 0) 1678 { 1679 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1680 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1681 if (bp_site_sp) 1682 { 1683 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1684 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1685 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1686 handled = true; 1687 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1688 { 1689 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1690 } 1691 else 1692 { 1693 StopInfoSP invalid_stop_info_sp; 1694 thread_sp->SetStopInfo (invalid_stop_info_sp); 1695 } 1696 } 1697 1698 } 1699 else if (reason.compare("trap") == 0) 1700 { 1701 // Let the trap just use the standard signal stop reason below... 1702 } 1703 else if (reason.compare("watchpoint") == 0) 1704 { 1705 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1706 // TODO: locate the watchpoint somehow... 1707 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1708 handled = true; 1709 } 1710 else if (reason.compare("exception") == 0) 1711 { 1712 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1713 handled = true; 1714 } 1715 else if (reason.compare("exec") == 0) 1716 { 1717 did_exec = true; 1718 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 1719 handled = true; 1720 } 1721 } 1722 1723 if (signo && did_exec == false) 1724 { 1725 if (signo == SIGTRAP) 1726 { 1727 // Currently we are going to assume SIGTRAP means we are either 1728 // hitting a breakpoint or hardware single stepping. 1729 handled = true; 1730 addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; 1731 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1732 1733 if (bp_site_sp) 1734 { 1735 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1736 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1737 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1738 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1739 { 1740 if(m_breakpoint_pc_offset != 0) 1741 thread_sp->GetRegisterContext()->SetPC(pc); 1742 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1743 } 1744 else 1745 { 1746 StopInfoSP invalid_stop_info_sp; 1747 thread_sp->SetStopInfo (invalid_stop_info_sp); 1748 } 1749 } 1750 else 1751 { 1752 // If we were stepping then assume the stop was the result of the trace. If we were 1753 // not stepping then report the SIGTRAP. 1754 // FIXME: We are still missing the case where we single step over a trap instruction. 1755 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 1756 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1757 else 1758 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1759 } 1760 } 1761 if (!handled) 1762 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1763 } 1764 1765 if (!description.empty()) 1766 { 1767 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 1768 if (stop_info_sp) 1769 { 1770 stop_info_sp->SetDescription (description.c_str()); 1771 } 1772 else 1773 { 1774 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1775 } 1776 } 1777 } 1778 } 1779 return eStateStopped; 1780 } 1781 break; 1782 1783 case 'W': 1784 // process exited 1785 return eStateExited; 1786 1787 default: 1788 break; 1789 } 1790 return eStateInvalid; 1791 } 1792 1793 void 1794 ProcessGDBRemote::RefreshStateAfterStop () 1795 { 1796 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1797 m_thread_ids.clear(); 1798 // Set the thread stop info. It might have a "threads" key whose value is 1799 // a list of all thread IDs in the current process, so m_thread_ids might 1800 // get set. 1801 SetThreadStopInfo (m_last_stop_packet); 1802 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1803 if (m_thread_ids.empty()) 1804 { 1805 // No, we need to fetch the thread list manually 1806 UpdateThreadIDList(); 1807 } 1808 1809 // Let all threads recover from stopping and do any clean up based 1810 // on the previous thread state (if any). 1811 m_thread_list_real.RefreshStateAfterStop(); 1812 1813 } 1814 1815 Error 1816 ProcessGDBRemote::DoHalt (bool &caused_stop) 1817 { 1818 Error error; 1819 1820 bool timed_out = false; 1821 Mutex::Locker locker; 1822 1823 if (m_public_state.GetValue() == eStateAttaching) 1824 { 1825 // We are being asked to halt during an attach. We need to just close 1826 // our file handle and debugserver will go away, and we can be done... 1827 m_gdb_comm.Disconnect(); 1828 } 1829 else 1830 { 1831 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1832 { 1833 if (timed_out) 1834 error.SetErrorString("timed out sending interrupt packet"); 1835 else 1836 error.SetErrorString("unknown error sending interrupt packet"); 1837 } 1838 1839 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1840 } 1841 return error; 1842 } 1843 1844 Error 1845 ProcessGDBRemote::DoDetach(bool keep_stopped) 1846 { 1847 Error error; 1848 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1849 if (log) 1850 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 1851 1852 DisableAllBreakpointSites (); 1853 1854 m_thread_list.DiscardThreadPlans(); 1855 1856 error = m_gdb_comm.Detach (keep_stopped); 1857 if (log) 1858 { 1859 if (error.Success()) 1860 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1861 else 1862 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 1863 } 1864 1865 if (!error.Success()) 1866 return error; 1867 1868 // Sleep for one second to let the process get all detached... 1869 StopAsyncThread (); 1870 1871 SetPrivateState (eStateDetached); 1872 ResumePrivateStateThread(); 1873 1874 //KillDebugserverProcess (); 1875 return error; 1876 } 1877 1878 1879 Error 1880 ProcessGDBRemote::DoDestroy () 1881 { 1882 Error error; 1883 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1884 if (log) 1885 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1886 1887 // There is a bug in older iOS debugservers where they don't shut down the process 1888 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1889 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1890 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1891 // destroy it again. 1892 // 1893 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1894 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1895 // the debugservers with this bug are equal. There really should be a better way to test this! 1896 // 1897 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1898 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1899 // just do the straight-forward kill. 1900 // 1901 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1902 // necessary (or helpful) to do any of this. 1903 1904 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1905 { 1906 PlatformSP platform_sp = GetTarget().GetPlatform(); 1907 1908 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1909 if (platform_sp 1910 && platform_sp->GetName() 1911 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 1912 { 1913 if (m_destroy_tried_resuming) 1914 { 1915 if (log) 1916 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1917 } 1918 else 1919 { 1920 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1921 // but we really need it to happen here and it doesn't matter if we do it twice. 1922 m_thread_list.DiscardThreadPlans(); 1923 DisableAllBreakpointSites(); 1924 1925 bool stop_looks_like_crash = false; 1926 ThreadList &threads = GetThreadList(); 1927 1928 { 1929 Mutex::Locker locker(threads.GetMutex()); 1930 1931 size_t num_threads = threads.GetSize(); 1932 for (size_t i = 0; i < num_threads; i++) 1933 { 1934 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1935 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1936 StopReason reason = eStopReasonInvalid; 1937 if (stop_info_sp) 1938 reason = stop_info_sp->GetStopReason(); 1939 if (reason == eStopReasonBreakpoint 1940 || reason == eStopReasonException) 1941 { 1942 if (log) 1943 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 1944 thread_sp->GetProtocolID(), 1945 stop_info_sp->GetDescription()); 1946 stop_looks_like_crash = true; 1947 break; 1948 } 1949 } 1950 } 1951 1952 if (stop_looks_like_crash) 1953 { 1954 if (log) 1955 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1956 m_destroy_tried_resuming = true; 1957 1958 // If we are going to run again before killing, it would be good to suspend all the threads 1959 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1960 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1961 // have to run the risk of letting those threads proceed a bit. 1962 1963 { 1964 Mutex::Locker locker(threads.GetMutex()); 1965 1966 size_t num_threads = threads.GetSize(); 1967 for (size_t i = 0; i < num_threads; i++) 1968 { 1969 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1970 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1971 StopReason reason = eStopReasonInvalid; 1972 if (stop_info_sp) 1973 reason = stop_info_sp->GetStopReason(); 1974 if (reason != eStopReasonBreakpoint 1975 && reason != eStopReasonException) 1976 { 1977 if (log) 1978 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 1979 thread_sp->GetProtocolID()); 1980 thread_sp->SetResumeState(eStateSuspended); 1981 } 1982 } 1983 } 1984 Resume (); 1985 return Destroy(); 1986 } 1987 } 1988 } 1989 } 1990 1991 // Interrupt if our inferior is running... 1992 int exit_status = SIGABRT; 1993 std::string exit_string; 1994 1995 if (m_gdb_comm.IsConnected()) 1996 { 1997 if (m_public_state.GetValue() != eStateAttaching) 1998 { 1999 2000 StringExtractorGDBRemote response; 2001 bool send_async = true; 2002 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 2003 2004 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) 2005 { 2006 char packet_cmd = response.GetChar(0); 2007 2008 if (packet_cmd == 'W' || packet_cmd == 'X') 2009 { 2010 SetLastStopPacket (response); 2011 ClearThreadIDList (); 2012 exit_status = response.GetHexU8(); 2013 } 2014 else 2015 { 2016 if (log) 2017 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2018 exit_string.assign("got unexpected response to k packet: "); 2019 exit_string.append(response.GetStringRef()); 2020 } 2021 } 2022 else 2023 { 2024 if (log) 2025 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2026 exit_string.assign("failed to send the k packet"); 2027 } 2028 2029 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 2030 } 2031 else 2032 { 2033 if (log) 2034 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2035 exit_string.assign ("killed or interrupted while attaching."); 2036 } 2037 } 2038 else 2039 { 2040 // If we missed setting the exit status on the way out, do it here. 2041 // NB set exit status can be called multiple times, the first one sets the status. 2042 exit_string.assign("destroying when not connected to debugserver"); 2043 } 2044 2045 SetExitStatus(exit_status, exit_string.c_str()); 2046 2047 StopAsyncThread (); 2048 KillDebugserverProcess (); 2049 return error; 2050 } 2051 2052 void 2053 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 2054 { 2055 lldb_private::Mutex::Locker locker (m_last_stop_packet_mutex); 2056 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 2057 if (did_exec) 2058 { 2059 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2060 if (log) 2061 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 2062 2063 m_thread_list_real.Clear(); 2064 m_thread_list.Clear(); 2065 BuildDynamicRegisterInfo (true); 2066 m_gdb_comm.ResetDiscoverableSettings(); 2067 } 2068 m_last_stop_packet = response; 2069 } 2070 2071 2072 //------------------------------------------------------------------ 2073 // Process Queries 2074 //------------------------------------------------------------------ 2075 2076 bool 2077 ProcessGDBRemote::IsAlive () 2078 { 2079 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2080 } 2081 2082 addr_t 2083 ProcessGDBRemote::GetImageInfoAddress() 2084 { 2085 return m_gdb_comm.GetShlibInfoAddr(); 2086 } 2087 2088 //------------------------------------------------------------------ 2089 // Process Memory 2090 //------------------------------------------------------------------ 2091 size_t 2092 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2093 { 2094 if (size > m_max_memory_size) 2095 { 2096 // Keep memory read sizes down to a sane limit. This function will be 2097 // called multiple times in order to complete the task by 2098 // lldb_private::Process so it is ok to do this. 2099 size = m_max_memory_size; 2100 } 2101 2102 char packet[64]; 2103 const int packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2104 assert (packet_len + 1 < (int)sizeof(packet)); 2105 StringExtractorGDBRemote response; 2106 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) 2107 { 2108 if (response.IsNormalResponse()) 2109 { 2110 error.Clear(); 2111 return response.GetHexBytes(buf, size, '\xdd'); 2112 } 2113 else if (response.IsErrorResponse()) 2114 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2115 else if (response.IsUnsupportedResponse()) 2116 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2117 else 2118 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2119 } 2120 else 2121 { 2122 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2123 } 2124 return 0; 2125 } 2126 2127 size_t 2128 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2129 { 2130 if (size > m_max_memory_size) 2131 { 2132 // Keep memory read sizes down to a sane limit. This function will be 2133 // called multiple times in order to complete the task by 2134 // lldb_private::Process so it is ok to do this. 2135 size = m_max_memory_size; 2136 } 2137 2138 StreamString packet; 2139 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2140 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2141 StringExtractorGDBRemote response; 2142 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) 2143 { 2144 if (response.IsOKResponse()) 2145 { 2146 error.Clear(); 2147 return size; 2148 } 2149 else if (response.IsErrorResponse()) 2150 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2151 else if (response.IsUnsupportedResponse()) 2152 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2153 else 2154 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2155 } 2156 else 2157 { 2158 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 2159 } 2160 return 0; 2161 } 2162 2163 lldb::addr_t 2164 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2165 { 2166 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2167 2168 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2169 switch (supported) 2170 { 2171 case eLazyBoolCalculate: 2172 case eLazyBoolYes: 2173 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2174 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2175 return allocated_addr; 2176 2177 case eLazyBoolNo: 2178 // Call mmap() to create memory in the inferior.. 2179 unsigned prot = 0; 2180 if (permissions & lldb::ePermissionsReadable) 2181 prot |= eMmapProtRead; 2182 if (permissions & lldb::ePermissionsWritable) 2183 prot |= eMmapProtWrite; 2184 if (permissions & lldb::ePermissionsExecutable) 2185 prot |= eMmapProtExec; 2186 2187 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2188 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2189 m_addr_to_mmap_size[allocated_addr] = size; 2190 else 2191 allocated_addr = LLDB_INVALID_ADDRESS; 2192 break; 2193 } 2194 2195 if (allocated_addr == LLDB_INVALID_ADDRESS) 2196 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2197 else 2198 error.Clear(); 2199 return allocated_addr; 2200 } 2201 2202 Error 2203 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2204 MemoryRegionInfo ®ion_info) 2205 { 2206 2207 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2208 return error; 2209 } 2210 2211 Error 2212 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2213 { 2214 2215 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2216 return error; 2217 } 2218 2219 Error 2220 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2221 { 2222 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2223 return error; 2224 } 2225 2226 Error 2227 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2228 { 2229 Error error; 2230 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2231 2232 switch (supported) 2233 { 2234 case eLazyBoolCalculate: 2235 // We should never be deallocating memory without allocating memory 2236 // first so we should never get eLazyBoolCalculate 2237 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2238 break; 2239 2240 case eLazyBoolYes: 2241 if (!m_gdb_comm.DeallocateMemory (addr)) 2242 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2243 break; 2244 2245 case eLazyBoolNo: 2246 // Call munmap() to deallocate memory in the inferior.. 2247 { 2248 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2249 if (pos != m_addr_to_mmap_size.end() && 2250 InferiorCallMunmap(this, addr, pos->second)) 2251 m_addr_to_mmap_size.erase (pos); 2252 else 2253 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2254 } 2255 break; 2256 } 2257 2258 return error; 2259 } 2260 2261 2262 //------------------------------------------------------------------ 2263 // Process STDIO 2264 //------------------------------------------------------------------ 2265 size_t 2266 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2267 { 2268 if (m_stdio_communication.IsConnected()) 2269 { 2270 ConnectionStatus status; 2271 m_stdio_communication.Write(src, src_len, status, NULL); 2272 } 2273 return 0; 2274 } 2275 2276 Error 2277 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2278 { 2279 Error error; 2280 assert (bp_site != NULL); 2281 2282 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2283 user_id_t site_id = bp_site->GetID(); 2284 const addr_t addr = bp_site->GetLoadAddress(); 2285 if (log) 2286 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2287 2288 if (bp_site->IsEnabled()) 2289 { 2290 if (log) 2291 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2292 return error; 2293 } 2294 else 2295 { 2296 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2297 2298 if (bp_site->HardwareRequired()) 2299 { 2300 // Try and set hardware breakpoint, and if that fails, fall through 2301 // and set a software breakpoint? 2302 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2303 { 2304 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2305 { 2306 bp_site->SetEnabled(true); 2307 bp_site->SetType (BreakpointSite::eHardware); 2308 } 2309 else 2310 { 2311 error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); 2312 } 2313 } 2314 else 2315 { 2316 error.SetErrorString("hardware breakpoints are not supported"); 2317 } 2318 return error; 2319 } 2320 else if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2321 { 2322 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2323 { 2324 bp_site->SetEnabled(true); 2325 bp_site->SetType (BreakpointSite::eExternal); 2326 return error; 2327 } 2328 } 2329 2330 return EnableSoftwareBreakpoint (bp_site); 2331 } 2332 2333 if (log) 2334 { 2335 const char *err_string = error.AsCString(); 2336 log->Printf ("ProcessGDBRemote::EnableBreakpointSite () error for breakpoint at 0x%8.8" PRIx64 ": %s", 2337 bp_site->GetLoadAddress(), 2338 err_string ? err_string : "NULL"); 2339 } 2340 // We shouldn't reach here on a successful breakpoint enable... 2341 if (error.Success()) 2342 error.SetErrorToGenericError(); 2343 return error; 2344 } 2345 2346 Error 2347 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2348 { 2349 Error error; 2350 assert (bp_site != NULL); 2351 addr_t addr = bp_site->GetLoadAddress(); 2352 user_id_t site_id = bp_site->GetID(); 2353 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2354 if (log) 2355 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2356 2357 if (bp_site->IsEnabled()) 2358 { 2359 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2360 2361 BreakpointSite::Type bp_type = bp_site->GetType(); 2362 switch (bp_type) 2363 { 2364 case BreakpointSite::eSoftware: 2365 error = DisableSoftwareBreakpoint (bp_site); 2366 break; 2367 2368 case BreakpointSite::eHardware: 2369 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2370 error.SetErrorToGenericError(); 2371 break; 2372 2373 case BreakpointSite::eExternal: 2374 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2375 error.SetErrorToGenericError(); 2376 break; 2377 } 2378 if (error.Success()) 2379 bp_site->SetEnabled(false); 2380 } 2381 else 2382 { 2383 if (log) 2384 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2385 return error; 2386 } 2387 2388 if (error.Success()) 2389 error.SetErrorToGenericError(); 2390 return error; 2391 } 2392 2393 // Pre-requisite: wp != NULL. 2394 static GDBStoppointType 2395 GetGDBStoppointType (Watchpoint *wp) 2396 { 2397 assert(wp); 2398 bool watch_read = wp->WatchpointRead(); 2399 bool watch_write = wp->WatchpointWrite(); 2400 2401 // watch_read and watch_write cannot both be false. 2402 assert(watch_read || watch_write); 2403 if (watch_read && watch_write) 2404 return eWatchpointReadWrite; 2405 else if (watch_read) 2406 return eWatchpointRead; 2407 else // Must be watch_write, then. 2408 return eWatchpointWrite; 2409 } 2410 2411 Error 2412 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2413 { 2414 Error error; 2415 if (wp) 2416 { 2417 user_id_t watchID = wp->GetID(); 2418 addr_t addr = wp->GetLoadAddress(); 2419 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2420 if (log) 2421 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2422 if (wp->IsEnabled()) 2423 { 2424 if (log) 2425 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2426 return error; 2427 } 2428 2429 GDBStoppointType type = GetGDBStoppointType(wp); 2430 // Pass down an appropriate z/Z packet... 2431 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2432 { 2433 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2434 { 2435 wp->SetEnabled(true, notify); 2436 return error; 2437 } 2438 else 2439 error.SetErrorString("sending gdb watchpoint packet failed"); 2440 } 2441 else 2442 error.SetErrorString("watchpoints not supported"); 2443 } 2444 else 2445 { 2446 error.SetErrorString("Watchpoint argument was NULL."); 2447 } 2448 if (error.Success()) 2449 error.SetErrorToGenericError(); 2450 return error; 2451 } 2452 2453 Error 2454 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2455 { 2456 Error error; 2457 if (wp) 2458 { 2459 user_id_t watchID = wp->GetID(); 2460 2461 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2462 2463 addr_t addr = wp->GetLoadAddress(); 2464 2465 if (log) 2466 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2467 2468 if (!wp->IsEnabled()) 2469 { 2470 if (log) 2471 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2472 // See also 'class WatchpointSentry' within StopInfo.cpp. 2473 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2474 // the watchpoint object to intelligently process this action. 2475 wp->SetEnabled(false, notify); 2476 return error; 2477 } 2478 2479 if (wp->IsHardware()) 2480 { 2481 GDBStoppointType type = GetGDBStoppointType(wp); 2482 // Pass down an appropriate z/Z packet... 2483 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2484 { 2485 wp->SetEnabled(false, notify); 2486 return error; 2487 } 2488 else 2489 error.SetErrorString("sending gdb watchpoint packet failed"); 2490 } 2491 // TODO: clear software watchpoints if we implement them 2492 } 2493 else 2494 { 2495 error.SetErrorString("Watchpoint argument was NULL."); 2496 } 2497 if (error.Success()) 2498 error.SetErrorToGenericError(); 2499 return error; 2500 } 2501 2502 void 2503 ProcessGDBRemote::Clear() 2504 { 2505 m_flags = 0; 2506 m_thread_list_real.Clear(); 2507 m_thread_list.Clear(); 2508 } 2509 2510 Error 2511 ProcessGDBRemote::DoSignal (int signo) 2512 { 2513 Error error; 2514 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2515 if (log) 2516 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2517 2518 if (!m_gdb_comm.SendAsyncSignal (signo)) 2519 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2520 return error; 2521 } 2522 2523 Error 2524 ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) 2525 { 2526 Error error; 2527 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2528 { 2529 // If we locate debugserver, keep that located version around 2530 static FileSpec g_debugserver_file_spec; 2531 2532 ProcessLaunchInfo debugserver_launch_info; 2533 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2534 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2535 2536 #if defined (__APPLE__) && defined (__arm__) 2537 // On iOS, still do a local connection using a random port 2538 const char *hostname = "localhost"; 2539 uint16_t port = get_random_port (); 2540 #else 2541 // Set hostname being NULL to do the reverse connect where debugserver 2542 // will bind to port zero and it will communicate back to us the port 2543 // that we will connect to 2544 const char *hostname = NULL; 2545 uint16_t port = 0; 2546 #endif 2547 2548 error = m_gdb_comm.StartDebugserverProcess (hostname, 2549 port, 2550 debugserver_launch_info, 2551 port); 2552 2553 if (error.Success ()) 2554 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2555 else 2556 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2557 2558 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2559 StartAsyncThread (); 2560 2561 if (error.Fail()) 2562 { 2563 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2564 2565 if (log) 2566 log->Printf("failed to start debugserver process: %s", error.AsCString()); 2567 return error; 2568 } 2569 2570 if (m_gdb_comm.IsConnected()) 2571 { 2572 // Finish the connection process by doing the handshake without connecting (send NULL URL) 2573 ConnectToDebugserver (NULL); 2574 } 2575 else 2576 { 2577 StreamString connect_url; 2578 connect_url.Printf("connect://%s:%u", hostname, port); 2579 error = ConnectToDebugserver (connect_url.GetString().c_str()); 2580 } 2581 2582 } 2583 return error; 2584 } 2585 2586 bool 2587 ProcessGDBRemote::MonitorDebugserverProcess 2588 ( 2589 void *callback_baton, 2590 lldb::pid_t debugserver_pid, 2591 bool exited, // True if the process did exit 2592 int signo, // Zero for no signal 2593 int exit_status // Exit value of process if signal is zero 2594 ) 2595 { 2596 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2597 // and might not exist anymore, so we need to carefully try to get the 2598 // target for this process first since we have a race condition when 2599 // we are done running between getting the notice that the inferior 2600 // process has died and the debugserver that was debugging this process. 2601 // In our test suite, we are also continually running process after 2602 // process, so we must be very careful to make sure: 2603 // 1 - process object hasn't been deleted already 2604 // 2 - that a new process object hasn't been recreated in its place 2605 2606 // "debugserver_pid" argument passed in is the process ID for 2607 // debugserver that we are tracking... 2608 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2609 2610 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2611 2612 // Get a shared pointer to the target that has a matching process pointer. 2613 // This target could be gone, or the target could already have a new process 2614 // object inside of it 2615 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2616 2617 if (log) 2618 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2619 2620 if (target_sp) 2621 { 2622 // We found a process in a target that matches, but another thread 2623 // might be in the process of launching a new process that will 2624 // soon replace it, so get a shared pointer to the process so we 2625 // can keep it alive. 2626 ProcessSP process_sp (target_sp->GetProcessSP()); 2627 // Now we have a shared pointer to the process that can't go away on us 2628 // so we now make sure it was the same as the one passed in, and also make 2629 // sure that our previous "process *" didn't get deleted and have a new 2630 // "process *" created in its place with the same pointer. To verify this 2631 // we make sure the process has our debugserver process ID. If we pass all 2632 // of these tests, then we are sure that this process is the one we were 2633 // looking for. 2634 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2635 { 2636 // Sleep for a half a second to make sure our inferior process has 2637 // time to set its exit status before we set it incorrectly when 2638 // both the debugserver and the inferior process shut down. 2639 usleep (500000); 2640 // If our process hasn't yet exited, debugserver might have died. 2641 // If the process did exit, the we are reaping it. 2642 const StateType state = process->GetState(); 2643 2644 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2645 state != eStateInvalid && 2646 state != eStateUnloaded && 2647 state != eStateExited && 2648 state != eStateDetached) 2649 { 2650 char error_str[1024]; 2651 if (signo) 2652 { 2653 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2654 if (signal_cstr) 2655 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2656 else 2657 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2658 } 2659 else 2660 { 2661 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2662 } 2663 2664 process->SetExitStatus (-1, error_str); 2665 } 2666 // Debugserver has exited we need to let our ProcessGDBRemote 2667 // know that it no longer has a debugserver instance 2668 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2669 } 2670 } 2671 return true; 2672 } 2673 2674 void 2675 ProcessGDBRemote::KillDebugserverProcess () 2676 { 2677 m_gdb_comm.Disconnect(); 2678 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2679 { 2680 Host::Kill (m_debugserver_pid, SIGINT); 2681 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2682 } 2683 } 2684 2685 void 2686 ProcessGDBRemote::Initialize() 2687 { 2688 static bool g_initialized = false; 2689 2690 if (g_initialized == false) 2691 { 2692 g_initialized = true; 2693 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2694 GetPluginDescriptionStatic(), 2695 CreateInstance, 2696 DebuggerInitialize); 2697 2698 Log::Callbacks log_callbacks = { 2699 ProcessGDBRemoteLog::DisableLog, 2700 ProcessGDBRemoteLog::EnableLog, 2701 ProcessGDBRemoteLog::ListLogCategories 2702 }; 2703 2704 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2705 } 2706 } 2707 2708 void 2709 ProcessGDBRemote::DebuggerInitialize (lldb_private::Debugger &debugger) 2710 { 2711 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 2712 { 2713 const bool is_global_setting = true; 2714 PluginManager::CreateSettingForProcessPlugin (debugger, 2715 GetGlobalPluginProperties()->GetValueProperties(), 2716 ConstString ("Properties for the gdb-remote process plug-in."), 2717 is_global_setting); 2718 } 2719 } 2720 2721 bool 2722 ProcessGDBRemote::StartAsyncThread () 2723 { 2724 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2725 2726 if (log) 2727 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2728 2729 Mutex::Locker start_locker(m_async_thread_state_mutex); 2730 if (m_async_thread_state == eAsyncThreadNotStarted) 2731 { 2732 // Create a thread that watches our internal state and controls which 2733 // events make it to clients (into the DCProcess event queue). 2734 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2735 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2736 { 2737 m_async_thread_state = eAsyncThreadRunning; 2738 return true; 2739 } 2740 else 2741 return false; 2742 } 2743 else 2744 { 2745 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2746 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2747 if (log) 2748 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2749 if (m_async_thread_state == eAsyncThreadRunning) 2750 return true; 2751 else 2752 return false; 2753 } 2754 } 2755 2756 void 2757 ProcessGDBRemote::StopAsyncThread () 2758 { 2759 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2760 2761 if (log) 2762 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2763 2764 Mutex::Locker start_locker(m_async_thread_state_mutex); 2765 if (m_async_thread_state == eAsyncThreadRunning) 2766 { 2767 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2768 2769 // This will shut down the async thread. 2770 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2771 2772 // Stop the stdio thread 2773 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2774 { 2775 Host::ThreadJoin (m_async_thread, NULL, NULL); 2776 } 2777 m_async_thread_state = eAsyncThreadDone; 2778 } 2779 else 2780 { 2781 if (log) 2782 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2783 } 2784 } 2785 2786 2787 thread_result_t 2788 ProcessGDBRemote::AsyncThread (void *arg) 2789 { 2790 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2791 2792 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2793 if (log) 2794 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2795 2796 Listener listener ("ProcessGDBRemote::AsyncThread"); 2797 EventSP event_sp; 2798 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2799 eBroadcastBitAsyncThreadShouldExit; 2800 2801 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2802 { 2803 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2804 2805 bool done = false; 2806 while (!done) 2807 { 2808 if (log) 2809 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2810 if (listener.WaitForEvent (NULL, event_sp)) 2811 { 2812 const uint32_t event_type = event_sp->GetType(); 2813 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2814 { 2815 if (log) 2816 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2817 2818 switch (event_type) 2819 { 2820 case eBroadcastBitAsyncContinue: 2821 { 2822 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2823 2824 if (continue_packet) 2825 { 2826 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2827 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2828 if (log) 2829 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2830 2831 if (::strstr (continue_cstr, "vAttach") == NULL) 2832 process->SetPrivateState(eStateRunning); 2833 StringExtractorGDBRemote response; 2834 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2835 2836 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2837 // The thread ID list might be contained within the "response", or the stop reply packet that 2838 // caused the stop. So clear it now before we give the stop reply packet to the process 2839 // using the process->SetLastStopPacket()... 2840 process->ClearThreadIDList (); 2841 2842 switch (stop_state) 2843 { 2844 case eStateStopped: 2845 case eStateCrashed: 2846 case eStateSuspended: 2847 process->SetLastStopPacket (response); 2848 process->SetPrivateState (stop_state); 2849 break; 2850 2851 case eStateExited: 2852 process->SetLastStopPacket (response); 2853 process->ClearThreadIDList(); 2854 response.SetFilePos(1); 2855 process->SetExitStatus(response.GetHexU8(), NULL); 2856 done = true; 2857 break; 2858 2859 case eStateInvalid: 2860 process->SetExitStatus(-1, "lost connection"); 2861 break; 2862 2863 default: 2864 process->SetPrivateState (stop_state); 2865 break; 2866 } 2867 } 2868 } 2869 break; 2870 2871 case eBroadcastBitAsyncThreadShouldExit: 2872 if (log) 2873 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2874 done = true; 2875 break; 2876 2877 default: 2878 if (log) 2879 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2880 done = true; 2881 break; 2882 } 2883 } 2884 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2885 { 2886 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2887 { 2888 process->SetExitStatus (-1, "lost connection"); 2889 done = true; 2890 } 2891 } 2892 } 2893 else 2894 { 2895 if (log) 2896 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2897 done = true; 2898 } 2899 } 2900 } 2901 2902 if (log) 2903 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 2904 2905 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2906 return NULL; 2907 } 2908 2909 //uint32_t 2910 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2911 //{ 2912 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2913 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2914 // if (m_local_debugserver) 2915 // { 2916 // return Host::ListProcessesMatchingName (name, matches, pids); 2917 // } 2918 // else 2919 // { 2920 // // FIXME: Implement talking to the remote debugserver. 2921 // return 0; 2922 // } 2923 // 2924 //} 2925 // 2926 bool 2927 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2928 lldb_private::StoppointCallbackContext *context, 2929 lldb::user_id_t break_id, 2930 lldb::user_id_t break_loc_id) 2931 { 2932 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2933 // run so I can stop it if that's what I want to do. 2934 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2935 if (log) 2936 log->Printf("Hit New Thread Notification breakpoint."); 2937 return false; 2938 } 2939 2940 2941 bool 2942 ProcessGDBRemote::StartNoticingNewThreads() 2943 { 2944 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2945 if (m_thread_create_bp_sp) 2946 { 2947 if (log && log->GetVerbose()) 2948 log->Printf("Enabled noticing new thread breakpoint."); 2949 m_thread_create_bp_sp->SetEnabled(true); 2950 } 2951 else 2952 { 2953 PlatformSP platform_sp (m_target.GetPlatform()); 2954 if (platform_sp) 2955 { 2956 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2957 if (m_thread_create_bp_sp) 2958 { 2959 if (log && log->GetVerbose()) 2960 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2961 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2962 } 2963 else 2964 { 2965 if (log) 2966 log->Printf("Failed to create new thread notification breakpoint."); 2967 } 2968 } 2969 } 2970 return m_thread_create_bp_sp.get() != NULL; 2971 } 2972 2973 bool 2974 ProcessGDBRemote::StopNoticingNewThreads() 2975 { 2976 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2977 if (log && log->GetVerbose()) 2978 log->Printf ("Disabling new thread notification breakpoint."); 2979 2980 if (m_thread_create_bp_sp) 2981 m_thread_create_bp_sp->SetEnabled(false); 2982 2983 return true; 2984 } 2985 2986 lldb_private::DynamicLoader * 2987 ProcessGDBRemote::GetDynamicLoader () 2988 { 2989 if (m_dyld_ap.get() == NULL) 2990 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 2991 return m_dyld_ap.get(); 2992 } 2993 2994 2995 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 2996 { 2997 private: 2998 2999 public: 3000 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3001 CommandObjectParsed (interpreter, 3002 "process plugin packet history", 3003 "Dumps the packet history buffer. ", 3004 NULL) 3005 { 3006 } 3007 3008 ~CommandObjectProcessGDBRemotePacketHistory () 3009 { 3010 } 3011 3012 bool 3013 DoExecute (Args& command, CommandReturnObject &result) 3014 { 3015 const size_t argc = command.GetArgumentCount(); 3016 if (argc == 0) 3017 { 3018 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3019 if (process) 3020 { 3021 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3022 result.SetStatus (eReturnStatusSuccessFinishResult); 3023 return true; 3024 } 3025 } 3026 else 3027 { 3028 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3029 } 3030 result.SetStatus (eReturnStatusFailed); 3031 return false; 3032 } 3033 }; 3034 3035 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3036 { 3037 private: 3038 3039 public: 3040 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3041 CommandObjectParsed (interpreter, 3042 "process plugin packet send", 3043 "Send a custom packet through the GDB remote protocol and print the answer. " 3044 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3045 NULL) 3046 { 3047 } 3048 3049 ~CommandObjectProcessGDBRemotePacketSend () 3050 { 3051 } 3052 3053 bool 3054 DoExecute (Args& command, CommandReturnObject &result) 3055 { 3056 const size_t argc = command.GetArgumentCount(); 3057 if (argc == 0) 3058 { 3059 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3060 result.SetStatus (eReturnStatusFailed); 3061 return false; 3062 } 3063 3064 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3065 if (process) 3066 { 3067 for (size_t i=0; i<argc; ++ i) 3068 { 3069 const char *packet_cstr = command.GetArgumentAtIndex(0); 3070 bool send_async = true; 3071 StringExtractorGDBRemote response; 3072 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3073 result.SetStatus (eReturnStatusSuccessFinishResult); 3074 Stream &output_strm = result.GetOutputStream(); 3075 output_strm.Printf (" packet: %s\n", packet_cstr); 3076 std::string &response_str = response.GetStringRef(); 3077 3078 if (strstr(packet_cstr, "qGetProfileData") != NULL) 3079 { 3080 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3081 } 3082 3083 if (response_str.empty()) 3084 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3085 else 3086 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3087 } 3088 } 3089 return true; 3090 } 3091 }; 3092 3093 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3094 { 3095 private: 3096 3097 public: 3098 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3099 CommandObjectRaw (interpreter, 3100 "process plugin packet monitor", 3101 "Send a qRcmd packet through the GDB remote protocol and print the response." 3102 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3103 NULL) 3104 { 3105 } 3106 3107 ~CommandObjectProcessGDBRemotePacketMonitor () 3108 { 3109 } 3110 3111 bool 3112 DoExecute (const char *command, CommandReturnObject &result) 3113 { 3114 if (command == NULL || command[0] == '\0') 3115 { 3116 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3117 result.SetStatus (eReturnStatusFailed); 3118 return false; 3119 } 3120 3121 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3122 if (process) 3123 { 3124 StreamString packet; 3125 packet.PutCString("qRcmd,"); 3126 packet.PutBytesAsRawHex8(command, strlen(command)); 3127 const char *packet_cstr = packet.GetString().c_str(); 3128 3129 bool send_async = true; 3130 StringExtractorGDBRemote response; 3131 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3132 result.SetStatus (eReturnStatusSuccessFinishResult); 3133 Stream &output_strm = result.GetOutputStream(); 3134 output_strm.Printf (" packet: %s\n", packet_cstr); 3135 const std::string &response_str = response.GetStringRef(); 3136 3137 if (response_str.empty()) 3138 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3139 else 3140 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3141 } 3142 return true; 3143 } 3144 }; 3145 3146 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3147 { 3148 private: 3149 3150 public: 3151 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3152 CommandObjectMultiword (interpreter, 3153 "process plugin packet", 3154 "Commands that deal with GDB remote packets.", 3155 NULL) 3156 { 3157 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3158 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3159 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3160 } 3161 3162 ~CommandObjectProcessGDBRemotePacket () 3163 { 3164 } 3165 }; 3166 3167 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3168 { 3169 public: 3170 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3171 CommandObjectMultiword (interpreter, 3172 "process plugin", 3173 "A set of commands for operating on a ProcessGDBRemote process.", 3174 "process plugin <subcommand> [<subcommand-options>]") 3175 { 3176 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3177 } 3178 3179 ~CommandObjectMultiwordProcessGDBRemote () 3180 { 3181 } 3182 }; 3183 3184 CommandObject * 3185 ProcessGDBRemote::GetPluginCommandObject() 3186 { 3187 if (!m_command_sp) 3188 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3189 return m_command_sp.get(); 3190 } 3191