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/Target/SystemRuntime.h" 60 #include "lldb/Utility/PseudoTerminal.h" 61 62 // Project includes 63 #include "lldb/Host/Host.h" 64 #include "Plugins/Process/Utility/FreeBSDSignals.h" 65 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 66 #include "Plugins/Process/Utility/LinuxSignals.h" 67 #include "Plugins/Process/Utility/StopInfoMachException.h" 68 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 69 #include "Utility/StringExtractorGDBRemote.h" 70 #include "GDBRemoteRegisterContext.h" 71 #include "ProcessGDBRemote.h" 72 #include "ProcessGDBRemoteLog.h" 73 #include "ThreadGDBRemote.h" 74 75 76 namespace lldb 77 { 78 // Provide a function that can easily dump the packet history if we know a 79 // ProcessGDBRemote * value (which we can get from logs or from debugging). 80 // We need the function in the lldb namespace so it makes it into the final 81 // executable since the LLDB shared library only exports stuff in the lldb 82 // namespace. This allows you to attach with a debugger and call this 83 // function and get the packet history dumped to a file. 84 void 85 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 86 { 87 lldb_private::StreamFile strm; 88 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 89 if (error.Success()) 90 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 91 } 92 } 93 94 #define DEBUGSERVER_BASENAME "debugserver" 95 using namespace lldb; 96 using namespace lldb_private; 97 98 99 namespace { 100 101 static PropertyDefinition 102 g_properties[] = 103 { 104 { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, 105 { "target-definition-file" , OptionValue::eTypeFileSpec , true, 0 , NULL, NULL, "The file that provides the description for remote target registers." }, 106 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 107 }; 108 109 enum 110 { 111 ePropertyPacketTimeout, 112 ePropertyTargetDefinitionFile 113 }; 114 115 class PluginProperties : public Properties 116 { 117 public: 118 119 static ConstString 120 GetSettingName () 121 { 122 return ProcessGDBRemote::GetPluginNameStatic(); 123 } 124 125 PluginProperties() : 126 Properties () 127 { 128 m_collection_sp.reset (new OptionValueProperties(GetSettingName())); 129 m_collection_sp->Initialize(g_properties); 130 } 131 132 virtual 133 ~PluginProperties() 134 { 135 } 136 137 uint64_t 138 GetPacketTimeout() 139 { 140 const uint32_t idx = ePropertyPacketTimeout; 141 return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); 142 } 143 144 bool 145 SetPacketTimeout(uint64_t timeout) 146 { 147 const uint32_t idx = ePropertyPacketTimeout; 148 return m_collection_sp->SetPropertyAtIndexAsUInt64(NULL, idx, timeout); 149 } 150 151 FileSpec 152 GetTargetDefinitionFile () const 153 { 154 const uint32_t idx = ePropertyTargetDefinitionFile; 155 return m_collection_sp->GetPropertyAtIndexAsFileSpec (NULL, idx); 156 } 157 }; 158 159 typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; 160 161 static const ProcessKDPPropertiesSP & 162 GetGlobalPluginProperties() 163 { 164 static ProcessKDPPropertiesSP g_settings_sp; 165 if (!g_settings_sp) 166 g_settings_sp.reset (new PluginProperties ()); 167 return g_settings_sp; 168 } 169 170 } // anonymous namespace end 171 172 // TODO Randomly assigning a port is unsafe. We should get an unused 173 // ephemeral port from the kernel and make sure we reserve it before passing 174 // it to debugserver. 175 176 #if defined (__APPLE__) 177 #define LOW_PORT (IPPORT_RESERVED) 178 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 179 #else 180 #define LOW_PORT (1024u) 181 #define HIGH_PORT (49151u) 182 #endif 183 184 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__) || defined(__aarch64__)) 185 static bool rand_initialized = false; 186 187 static inline uint16_t 188 get_random_port () 189 { 190 if (!rand_initialized) 191 { 192 time_t seed = time(NULL); 193 194 rand_initialized = true; 195 srand(seed); 196 } 197 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 198 } 199 #endif 200 201 lldb_private::ConstString 202 ProcessGDBRemote::GetPluginNameStatic() 203 { 204 static ConstString g_name("gdb-remote"); 205 return g_name; 206 } 207 208 const char * 209 ProcessGDBRemote::GetPluginDescriptionStatic() 210 { 211 return "GDB Remote protocol based debugging plug-in."; 212 } 213 214 void 215 ProcessGDBRemote::Terminate() 216 { 217 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 218 } 219 220 221 lldb::ProcessSP 222 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 223 { 224 lldb::ProcessSP process_sp; 225 if (crash_file_path == NULL) 226 process_sp.reset (new ProcessGDBRemote (target, listener)); 227 return process_sp; 228 } 229 230 bool 231 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 232 { 233 if (plugin_specified_by_name) 234 return true; 235 236 // For now we are just making sure the file exists for a given module 237 Module *exe_module = target.GetExecutableModulePointer(); 238 if (exe_module) 239 { 240 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 241 // We can't debug core files... 242 switch (exe_objfile->GetType()) 243 { 244 case ObjectFile::eTypeInvalid: 245 case ObjectFile::eTypeCoreFile: 246 case ObjectFile::eTypeDebugInfo: 247 case ObjectFile::eTypeObjectFile: 248 case ObjectFile::eTypeSharedLibrary: 249 case ObjectFile::eTypeStubLibrary: 250 case ObjectFile::eTypeJIT: 251 return false; 252 case ObjectFile::eTypeExecutable: 253 case ObjectFile::eTypeDynamicLinker: 254 case ObjectFile::eTypeUnknown: 255 break; 256 } 257 return exe_module->GetFileSpec().Exists(); 258 } 259 // However, if there is no executable module, we return true since we might be preparing to attach. 260 return true; 261 } 262 263 //---------------------------------------------------------------------- 264 // ProcessGDBRemote constructor 265 //---------------------------------------------------------------------- 266 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 267 Process (target, listener), 268 m_flags (0), 269 m_gdb_comm(false), 270 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 271 m_last_stop_packet (), 272 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 273 m_register_info (), 274 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 275 m_async_thread (LLDB_INVALID_HOST_THREAD), 276 m_async_thread_state(eAsyncThreadNotStarted), 277 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 278 m_thread_ids (), 279 m_continue_c_tids (), 280 m_continue_C_tids (), 281 m_continue_s_tids (), 282 m_continue_S_tids (), 283 m_max_memory_size (0), 284 m_remote_stub_max_memory_size (0), 285 m_addr_to_mmap_size (), 286 m_thread_create_bp_sp (), 287 m_waiting_for_attach (false), 288 m_destroy_tried_resuming (false), 289 m_command_sp (), 290 m_breakpoint_pc_offset (0) 291 { 292 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 293 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 294 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 295 const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); 296 if (timeout_seconds > 0) 297 m_gdb_comm.SetPacketTimeout(timeout_seconds); 298 } 299 300 //---------------------------------------------------------------------- 301 // Destructor 302 //---------------------------------------------------------------------- 303 ProcessGDBRemote::~ProcessGDBRemote() 304 { 305 // m_mach_process.UnregisterNotificationCallbacks (this); 306 Clear(); 307 // We need to call finalize on the process before destroying ourselves 308 // to make sure all of the broadcaster cleanup goes as planned. If we 309 // destruct this class, then Process::~Process() might have problems 310 // trying to fully destroy the broadcaster. 311 Finalize(); 312 313 // The general Finalize is going to try to destroy the process and that SHOULD 314 // shut down the async thread. However, if we don't kill it it will get stranded and 315 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 316 StopAsyncThread(); 317 KillDebugserverProcess(); 318 } 319 320 //---------------------------------------------------------------------- 321 // PluginInterface 322 //---------------------------------------------------------------------- 323 ConstString 324 ProcessGDBRemote::GetPluginName() 325 { 326 return GetPluginNameStatic(); 327 } 328 329 uint32_t 330 ProcessGDBRemote::GetPluginVersion() 331 { 332 return 1; 333 } 334 335 bool 336 ProcessGDBRemote::ParsePythonTargetDefinition(const FileSpec &target_definition_fspec) 337 { 338 #ifndef LLDB_DISABLE_PYTHON 339 ScriptInterpreter *interpreter = GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 340 Error error; 341 lldb::ScriptInterpreterObjectSP module_object_sp (interpreter->LoadPluginModule(target_definition_fspec, error)); 342 if (module_object_sp) 343 { 344 lldb::ScriptInterpreterObjectSP target_definition_sp (interpreter->GetDynamicSettings(module_object_sp, 345 &GetTarget(), 346 "gdb-server-target-definition", 347 error)); 348 349 PythonDictionary target_dict(target_definition_sp); 350 351 if (target_dict) 352 { 353 PythonDictionary host_info_dict (target_dict.GetItemForKey("host-info")); 354 if (host_info_dict) 355 { 356 ArchSpec host_arch (host_info_dict.GetItemForKeyAsString(PythonString("triple"))); 357 358 if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) 359 { 360 GetTarget().SetArchitecture(host_arch); 361 } 362 363 } 364 m_breakpoint_pc_offset = target_dict.GetItemForKeyAsInteger("breakpoint-pc-offset", 0); 365 366 if (m_register_info.SetRegisterInfo (target_dict, GetTarget().GetArchitecture().GetByteOrder()) > 0) 367 { 368 return true; 369 } 370 } 371 } 372 #endif 373 return false; 374 } 375 376 377 void 378 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 379 { 380 if (!force && m_register_info.GetNumRegisters() > 0) 381 return; 382 383 char packet[128]; 384 m_register_info.Clear(); 385 uint32_t reg_offset = 0; 386 uint32_t reg_num = 0; 387 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 388 response_type == StringExtractorGDBRemote::eResponse; 389 ++reg_num) 390 { 391 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 392 assert (packet_len < (int)sizeof(packet)); 393 StringExtractorGDBRemote response; 394 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false) == GDBRemoteCommunication::PacketResult::Success) 395 { 396 response_type = response.GetResponseType(); 397 if (response_type == StringExtractorGDBRemote::eResponse) 398 { 399 std::string name; 400 std::string value; 401 ConstString reg_name; 402 ConstString alt_name; 403 ConstString set_name; 404 std::vector<uint32_t> value_regs; 405 std::vector<uint32_t> invalidate_regs; 406 RegisterInfo reg_info = { NULL, // Name 407 NULL, // Alt name 408 0, // byte size 409 reg_offset, // offset 410 eEncodingUint, // encoding 411 eFormatHex, // formate 412 { 413 LLDB_INVALID_REGNUM, // GCC reg num 414 LLDB_INVALID_REGNUM, // DWARF reg num 415 LLDB_INVALID_REGNUM, // generic reg num 416 reg_num, // GDB reg num 417 reg_num // native register number 418 }, 419 NULL, 420 NULL 421 }; 422 423 while (response.GetNameColonValue(name, value)) 424 { 425 if (name.compare("name") == 0) 426 { 427 reg_name.SetCString(value.c_str()); 428 } 429 else if (name.compare("alt-name") == 0) 430 { 431 alt_name.SetCString(value.c_str()); 432 } 433 else if (name.compare("bitsize") == 0) 434 { 435 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 436 } 437 else if (name.compare("offset") == 0) 438 { 439 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 440 if (reg_offset != offset) 441 { 442 reg_offset = offset; 443 } 444 } 445 else if (name.compare("encoding") == 0) 446 { 447 const Encoding encoding = Args::StringToEncoding (value.c_str()); 448 if (encoding != eEncodingInvalid) 449 reg_info.encoding = encoding; 450 } 451 else if (name.compare("format") == 0) 452 { 453 Format format = eFormatInvalid; 454 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 455 reg_info.format = format; 456 else if (value.compare("binary") == 0) 457 reg_info.format = eFormatBinary; 458 else if (value.compare("decimal") == 0) 459 reg_info.format = eFormatDecimal; 460 else if (value.compare("hex") == 0) 461 reg_info.format = eFormatHex; 462 else if (value.compare("float") == 0) 463 reg_info.format = eFormatFloat; 464 else if (value.compare("vector-sint8") == 0) 465 reg_info.format = eFormatVectorOfSInt8; 466 else if (value.compare("vector-uint8") == 0) 467 reg_info.format = eFormatVectorOfUInt8; 468 else if (value.compare("vector-sint16") == 0) 469 reg_info.format = eFormatVectorOfSInt16; 470 else if (value.compare("vector-uint16") == 0) 471 reg_info.format = eFormatVectorOfUInt16; 472 else if (value.compare("vector-sint32") == 0) 473 reg_info.format = eFormatVectorOfSInt32; 474 else if (value.compare("vector-uint32") == 0) 475 reg_info.format = eFormatVectorOfUInt32; 476 else if (value.compare("vector-float32") == 0) 477 reg_info.format = eFormatVectorOfFloat32; 478 else if (value.compare("vector-uint128") == 0) 479 reg_info.format = eFormatVectorOfUInt128; 480 } 481 else if (name.compare("set") == 0) 482 { 483 set_name.SetCString(value.c_str()); 484 } 485 else if (name.compare("gcc") == 0) 486 { 487 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 488 } 489 else if (name.compare("dwarf") == 0) 490 { 491 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 492 } 493 else if (name.compare("generic") == 0) 494 { 495 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 496 } 497 else if (name.compare("container-regs") == 0) 498 { 499 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 500 value_pair.second = value; 501 do 502 { 503 value_pair = value_pair.second.split(','); 504 if (!value_pair.first.empty()) 505 { 506 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 507 if (reg != LLDB_INVALID_REGNUM) 508 value_regs.push_back (reg); 509 } 510 } while (!value_pair.second.empty()); 511 } 512 else if (name.compare("invalidate-regs") == 0) 513 { 514 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 515 value_pair.second = value; 516 do 517 { 518 value_pair = value_pair.second.split(','); 519 if (!value_pair.first.empty()) 520 { 521 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 522 if (reg != LLDB_INVALID_REGNUM) 523 invalidate_regs.push_back (reg); 524 } 525 } while (!value_pair.second.empty()); 526 } 527 } 528 529 reg_info.byte_offset = reg_offset; 530 assert (reg_info.byte_size != 0); 531 reg_offset += reg_info.byte_size; 532 if (!value_regs.empty()) 533 { 534 value_regs.push_back(LLDB_INVALID_REGNUM); 535 reg_info.value_regs = value_regs.data(); 536 } 537 if (!invalidate_regs.empty()) 538 { 539 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 540 reg_info.invalidate_regs = invalidate_regs.data(); 541 } 542 543 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 544 } 545 else 546 { 547 break; // ensure exit before reg_num is incremented 548 } 549 } 550 else 551 { 552 break; 553 } 554 } 555 556 // Check if qHostInfo specified a specific packet timeout for this connection. 557 // If so then lets update our setting so the user knows what the timeout is 558 // and can see it. 559 const uint32_t host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout(); 560 if (host_packet_timeout) 561 { 562 GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout); 563 } 564 565 566 if (reg_num == 0) 567 { 568 FileSpec target_definition_fspec = GetGlobalPluginProperties()->GetTargetDefinitionFile (); 569 570 if (target_definition_fspec) 571 { 572 // See if we can get register definitions from a python file 573 if (ParsePythonTargetDefinition (target_definition_fspec)) 574 return; 575 } 576 } 577 578 // We didn't get anything if the accumulated reg_num is zero. See if we are 579 // debugging ARM and fill with a hard coded register set until we can get an 580 // updated debugserver down on the devices. 581 // On the other hand, if the accumulated reg_num is positive, see if we can 582 // add composite registers to the existing primordial ones. 583 bool from_scratch = (reg_num == 0); 584 585 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 586 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 587 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 588 589 // Use the process' architecture instead of the host arch, if available 590 ArchSpec remote_arch; 591 if (remote_process_arch.IsValid ()) 592 remote_arch = remote_process_arch; 593 else 594 remote_arch = remote_host_arch; 595 596 if (!target_arch.IsValid()) 597 { 598 if (remote_arch.IsValid() 599 && remote_arch.GetMachine() == llvm::Triple::arm 600 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 601 m_register_info.HardcodeARMRegisters(from_scratch); 602 } 603 else if (target_arch.GetMachine() == llvm::Triple::arm) 604 { 605 m_register_info.HardcodeARMRegisters(from_scratch); 606 } 607 608 // At this point, we can finalize our register info. 609 m_register_info.Finalize (); 610 } 611 612 Error 613 ProcessGDBRemote::WillLaunch (Module* module) 614 { 615 return WillLaunchOrAttach (); 616 } 617 618 Error 619 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 620 { 621 return WillLaunchOrAttach (); 622 } 623 624 Error 625 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 626 { 627 return WillLaunchOrAttach (); 628 } 629 630 Error 631 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 632 { 633 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 634 Error error (WillLaunchOrAttach ()); 635 636 if (error.Fail()) 637 return error; 638 639 error = ConnectToDebugserver (remote_url); 640 641 if (error.Fail()) 642 return error; 643 StartAsyncThread (); 644 645 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 646 if (pid == LLDB_INVALID_PROCESS_ID) 647 { 648 // We don't have a valid process ID, so note that we are connected 649 // and could now request to launch or attach, or get remote process 650 // listings... 651 SetPrivateState (eStateConnected); 652 } 653 else 654 { 655 // We have a valid process 656 SetID (pid); 657 GetThreadList(); 658 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) 659 { 660 if (!m_target.GetArchitecture().IsValid()) 661 { 662 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 663 { 664 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 665 } 666 else 667 { 668 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 669 } 670 } 671 672 const StateType state = SetThreadStopInfo (m_last_stop_packet); 673 if (state == eStateStopped) 674 { 675 SetPrivateState (state); 676 } 677 else 678 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 679 } 680 else 681 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 682 } 683 684 if (log) 685 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalizing target architecture initial triple: %s (GetTarget().GetArchitecture().IsValid() %s, m_gdb_comm.GetHostArchitecture().IsValid(): %s)", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str (), GetTarget ().GetArchitecture ().IsValid () ? "true" : "false", m_gdb_comm.GetHostArchitecture ().IsValid () ? "true" : "false"); 686 687 688 if (error.Success() 689 && !GetTarget().GetArchitecture().IsValid() 690 && m_gdb_comm.GetHostArchitecture().IsValid()) 691 { 692 // Prefer the *process'* architecture over that of the *host*, if available. 693 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 694 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 695 else 696 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 697 } 698 699 if (log) 700 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalized target architecture triple: %s", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str ()); 701 702 // Set the Unix signals properly for the target. 703 // FIXME Add a gdb-remote packet to discover dynamically. 704 if (error.Success ()) 705 { 706 const ArchSpec arch_spec = GetTarget ().GetArchitecture (); 707 if (arch_spec.IsValid ()) 708 { 709 if (log) 710 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": determining unix signals type based on architecture %s, triple %s", __FUNCTION__, GetID (), arch_spec.GetArchitectureName () ? arch_spec.GetArchitectureName () : "<null>", arch_spec.GetTriple ().getTriple ().c_str ()); 711 712 switch (arch_spec.GetTriple ().getOS ()) 713 { 714 case llvm::Triple::Linux: 715 SetUnixSignals (UnixSignalsSP (new process_linux::LinuxSignals ())); 716 if (log) 717 log->Printf ("ProcessGDBRemote::%s using Linux unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); 718 break; 719 case llvm::Triple::OpenBSD: 720 case llvm::Triple::FreeBSD: 721 case llvm::Triple::NetBSD: 722 SetUnixSignals (UnixSignalsSP (new FreeBSDSignals ())); 723 if (log) 724 log->Printf ("ProcessGDBRemote::%s using *BSD unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); 725 break; 726 default: 727 SetUnixSignals (UnixSignalsSP (new UnixSignals ())); 728 if (log) 729 log->Printf ("ProcessGDBRemote::%s using generic unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); 730 break; 731 } 732 } 733 } 734 735 return error; 736 } 737 738 Error 739 ProcessGDBRemote::WillLaunchOrAttach () 740 { 741 Error error; 742 m_stdio_communication.Clear (); 743 return error; 744 } 745 746 //---------------------------------------------------------------------- 747 // Process Control 748 //---------------------------------------------------------------------- 749 Error 750 ProcessGDBRemote::DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) 751 { 752 Error error; 753 754 uint32_t launch_flags = launch_info.GetFlags().Get(); 755 const char *stdin_path = NULL; 756 const char *stdout_path = NULL; 757 const char *stderr_path = NULL; 758 const char *working_dir = launch_info.GetWorkingDirectory(); 759 760 const FileAction *file_action; 761 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 762 if (file_action) 763 { 764 if (file_action->GetAction() == FileAction::eFileActionOpen) 765 stdin_path = file_action->GetPath(); 766 } 767 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 768 if (file_action) 769 { 770 if (file_action->GetAction() == FileAction::eFileActionOpen) 771 stdout_path = file_action->GetPath(); 772 } 773 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 774 if (file_action) 775 { 776 if (file_action->GetAction() == FileAction::eFileActionOpen) 777 stderr_path = file_action->GetPath(); 778 } 779 780 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 781 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 782 // ::LogSetLogFile ("/dev/stdout"); 783 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 784 785 ObjectFile * object_file = exe_module->GetObjectFile(); 786 if (object_file) 787 { 788 // Make sure we aren't already connected? 789 if (!m_gdb_comm.IsConnected()) 790 { 791 error = LaunchAndConnectToDebugserver (launch_info); 792 } 793 794 if (error.Success()) 795 { 796 lldb_utility::PseudoTerminal pty; 797 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 798 799 // If the debugserver is local and we aren't disabling STDIO, lets use 800 // a pseudo terminal to instead of relying on the 'O' packets for stdio 801 // since 'O' packets can really slow down debugging if the inferior 802 // does a lot of output. 803 PlatformSP platform_sp (m_target.GetPlatform()); 804 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 805 { 806 const char *slave_name = NULL; 807 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 808 { 809 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 810 slave_name = pty.GetSlaveName (NULL, 0); 811 } 812 if (stdin_path == NULL) 813 stdin_path = slave_name; 814 815 if (stdout_path == NULL) 816 stdout_path = slave_name; 817 818 if (stderr_path == NULL) 819 stderr_path = slave_name; 820 } 821 822 // Set STDIN to /dev/null if we want STDIO disabled or if either 823 // STDOUT or STDERR have been set to something and STDIN hasn't 824 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 825 stdin_path = "/dev/null"; 826 827 // Set STDOUT to /dev/null if we want STDIO disabled or if either 828 // STDIN or STDERR have been set to something and STDOUT hasn't 829 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 830 stdout_path = "/dev/null"; 831 832 // Set STDERR to /dev/null if we want STDIO disabled or if either 833 // STDIN or STDOUT have been set to something and STDERR hasn't 834 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 835 stderr_path = "/dev/null"; 836 837 if (stdin_path) 838 m_gdb_comm.SetSTDIN (stdin_path); 839 if (stdout_path) 840 m_gdb_comm.SetSTDOUT (stdout_path); 841 if (stderr_path) 842 m_gdb_comm.SetSTDERR (stderr_path); 843 844 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 845 m_gdb_comm.SetDetachOnError (launch_flags & eLaunchFlagDetachOnError); 846 847 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 848 849 const char * launch_event_data = launch_info.GetLaunchEventData(); 850 if (launch_event_data != NULL && *launch_event_data != '\0') 851 m_gdb_comm.SendLaunchEventDataPacket (launch_event_data); 852 853 if (working_dir && working_dir[0]) 854 { 855 m_gdb_comm.SetWorkingDir (working_dir); 856 } 857 858 // Send the environment and the program + arguments after we connect 859 const Args &environment = launch_info.GetEnvironmentEntries(); 860 if (environment.GetArgumentCount()) 861 { 862 size_t num_environment_entries = environment.GetArgumentCount(); 863 for (size_t i=0; i<num_environment_entries; ++i) 864 { 865 const char *env_entry = environment.GetArgumentAtIndex(i); 866 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 867 break; 868 } 869 } 870 871 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 872 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info); 873 if (arg_packet_err == 0) 874 { 875 std::string error_str; 876 if (m_gdb_comm.GetLaunchSuccess (error_str)) 877 { 878 SetID (m_gdb_comm.GetCurrentProcessID ()); 879 } 880 else 881 { 882 error.SetErrorString (error_str.c_str()); 883 } 884 } 885 else 886 { 887 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 888 } 889 890 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 891 892 if (GetID() == LLDB_INVALID_PROCESS_ID) 893 { 894 if (log) 895 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 896 KillDebugserverProcess (); 897 return error; 898 } 899 900 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) 901 { 902 if (!m_target.GetArchitecture().IsValid()) 903 { 904 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 905 { 906 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 907 } 908 else 909 { 910 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 911 } 912 } 913 914 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 915 916 if (!disable_stdio) 917 { 918 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 919 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 920 } 921 } 922 } 923 else 924 { 925 if (log) 926 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 927 } 928 } 929 else 930 { 931 // Set our user ID to an invalid process ID. 932 SetID(LLDB_INVALID_PROCESS_ID); 933 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 934 exe_module->GetFileSpec().GetFilename().AsCString(), 935 exe_module->GetArchitecture().GetArchitectureName()); 936 } 937 return error; 938 939 } 940 941 942 Error 943 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 944 { 945 Error error; 946 // Only connect if we have a valid connect URL 947 948 if (connect_url && connect_url[0]) 949 { 950 std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 951 if (conn_ap.get()) 952 { 953 const uint32_t max_retry_count = 50; 954 uint32_t retry_count = 0; 955 while (!m_gdb_comm.IsConnected()) 956 { 957 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 958 { 959 m_gdb_comm.SetConnection (conn_ap.release()); 960 break; 961 } 962 else if (error.WasInterrupted()) 963 { 964 // If we were interrupted, don't keep retrying. 965 break; 966 } 967 968 retry_count++; 969 970 if (retry_count >= max_retry_count) 971 break; 972 973 usleep (100000); 974 } 975 } 976 } 977 978 if (!m_gdb_comm.IsConnected()) 979 { 980 if (error.Success()) 981 error.SetErrorString("not connected to remote gdb server"); 982 return error; 983 } 984 985 // We always seem to be able to open a connection to a local port 986 // so we need to make sure we can then send data to it. If we can't 987 // then we aren't actually connected to anything, so try and do the 988 // handshake with the remote GDB server and make sure that goes 989 // alright. 990 if (!m_gdb_comm.HandshakeWithServer (&error)) 991 { 992 m_gdb_comm.Disconnect(); 993 if (error.Success()) 994 error.SetErrorString("not connected to remote gdb server"); 995 return error; 996 } 997 m_gdb_comm.GetThreadSuffixSupported (); 998 m_gdb_comm.GetListThreadsInStopReplySupported (); 999 m_gdb_comm.GetHostInfo (); 1000 m_gdb_comm.GetVContSupported ('c'); 1001 m_gdb_comm.GetVAttachOrWaitSupported(); 1002 1003 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 1004 for (size_t idx = 0; idx < num_cmds; idx++) 1005 { 1006 StringExtractorGDBRemote response; 1007 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 1008 } 1009 return error; 1010 } 1011 1012 void 1013 ProcessGDBRemote::DidLaunchOrAttach (ArchSpec& process_arch) 1014 { 1015 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1016 if (log) 1017 log->Printf ("ProcessGDBRemote::DidLaunch()"); 1018 if (GetID() != LLDB_INVALID_PROCESS_ID) 1019 { 1020 BuildDynamicRegisterInfo (false); 1021 1022 // See if the GDB server supports the qHostInfo information 1023 1024 1025 // See if the GDB server supports the qProcessInfo packet, if so 1026 // prefer that over the Host information as it will be more specific 1027 // to our process. 1028 1029 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 1030 process_arch = m_gdb_comm.GetProcessArchitecture(); 1031 else 1032 process_arch = m_gdb_comm.GetHostArchitecture(); 1033 1034 if (process_arch.IsValid()) 1035 { 1036 ArchSpec &target_arch = GetTarget().GetArchitecture(); 1037 1038 if (target_arch.IsValid()) 1039 { 1040 // If the remote host is ARM and we have apple as the vendor, then 1041 // ARM executables and shared libraries can have mixed ARM architectures. 1042 // You can have an armv6 executable, and if the host is armv7, then the 1043 // system will load the best possible architecture for all shared libraries 1044 // it has, so we really need to take the remote host architecture as our 1045 // defacto architecture in this case. 1046 1047 if (process_arch.GetMachine() == llvm::Triple::arm && 1048 process_arch.GetTriple().getVendor() == llvm::Triple::Apple) 1049 { 1050 GetTarget().SetArchitecture (process_arch); 1051 } 1052 else 1053 { 1054 // Fill in what is missing in the triple 1055 const llvm::Triple &remote_triple = process_arch.GetTriple(); 1056 llvm::Triple &target_triple = target_arch.GetTriple(); 1057 if (target_triple.getVendorName().size() == 0) 1058 { 1059 target_triple.setVendor (remote_triple.getVendor()); 1060 1061 if (target_triple.getOSName().size() == 0) 1062 { 1063 target_triple.setOS (remote_triple.getOS()); 1064 1065 if (target_triple.getEnvironmentName().size() == 0) 1066 target_triple.setEnvironment (remote_triple.getEnvironment()); 1067 } 1068 } 1069 } 1070 } 1071 else 1072 { 1073 // The target doesn't have a valid architecture yet, set it from 1074 // the architecture we got from the remote GDB server 1075 GetTarget().SetArchitecture (process_arch); 1076 } 1077 } 1078 } 1079 } 1080 1081 void 1082 ProcessGDBRemote::DidLaunch () 1083 { 1084 ArchSpec process_arch; 1085 DidLaunchOrAttach (process_arch); 1086 } 1087 1088 Error 1089 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 1090 { 1091 ProcessAttachInfo attach_info; 1092 return DoAttachToProcessWithID(attach_pid, attach_info); 1093 } 1094 1095 Error 1096 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 1097 { 1098 Error error; 1099 // Clear out and clean up from any current state 1100 Clear(); 1101 if (attach_pid != LLDB_INVALID_PROCESS_ID) 1102 { 1103 // Make sure we aren't already connected? 1104 if (!m_gdb_comm.IsConnected()) 1105 { 1106 error = LaunchAndConnectToDebugserver (attach_info); 1107 1108 if (error.Fail()) 1109 { 1110 const char *error_string = error.AsCString(); 1111 if (error_string == NULL) 1112 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1113 1114 SetExitStatus (-1, error_string); 1115 } 1116 } 1117 1118 if (error.Success()) 1119 { 1120 m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); 1121 1122 char packet[64]; 1123 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 1124 SetID (attach_pid); 1125 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 1126 } 1127 } 1128 return error; 1129 } 1130 1131 Error 1132 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, const ProcessAttachInfo &attach_info) 1133 { 1134 Error error; 1135 // Clear out and clean up from any current state 1136 Clear(); 1137 1138 if (process_name && process_name[0]) 1139 { 1140 // Make sure we aren't already connected? 1141 if (!m_gdb_comm.IsConnected()) 1142 { 1143 error = LaunchAndConnectToDebugserver (attach_info); 1144 1145 if (error.Fail()) 1146 { 1147 const char *error_string = error.AsCString(); 1148 if (error_string == NULL) 1149 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1150 1151 SetExitStatus (-1, error_string); 1152 } 1153 } 1154 1155 if (error.Success()) 1156 { 1157 StreamString packet; 1158 1159 m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); 1160 1161 if (attach_info.GetWaitForLaunch()) 1162 { 1163 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1164 { 1165 packet.PutCString ("vAttachWait"); 1166 } 1167 else 1168 { 1169 if (attach_info.GetIgnoreExisting()) 1170 packet.PutCString("vAttachWait"); 1171 else 1172 packet.PutCString ("vAttachOrWait"); 1173 } 1174 } 1175 else 1176 packet.PutCString("vAttachName"); 1177 packet.PutChar(';'); 1178 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1179 1180 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1181 1182 } 1183 } 1184 return error; 1185 } 1186 1187 1188 bool 1189 ProcessGDBRemote::SetExitStatus (int exit_status, const char *cstr) 1190 { 1191 m_gdb_comm.Disconnect(); 1192 return Process::SetExitStatus (exit_status, cstr); 1193 } 1194 1195 void 1196 ProcessGDBRemote::DidAttach (ArchSpec &process_arch) 1197 { 1198 // If you can figure out what the architecture is, fill it in here. 1199 process_arch.Clear(); 1200 DidLaunchOrAttach (process_arch); 1201 } 1202 1203 1204 Error 1205 ProcessGDBRemote::WillResume () 1206 { 1207 m_continue_c_tids.clear(); 1208 m_continue_C_tids.clear(); 1209 m_continue_s_tids.clear(); 1210 m_continue_S_tids.clear(); 1211 return Error(); 1212 } 1213 1214 Error 1215 ProcessGDBRemote::DoResume () 1216 { 1217 Error error; 1218 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1219 if (log) 1220 log->Printf ("ProcessGDBRemote::Resume()"); 1221 1222 Listener listener ("gdb-remote.resume-packet-sent"); 1223 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1224 { 1225 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1226 1227 const size_t num_threads = GetThreadList().GetSize(); 1228 1229 StreamString continue_packet; 1230 bool continue_packet_error = false; 1231 if (m_gdb_comm.HasAnyVContSupport ()) 1232 { 1233 if (m_continue_c_tids.size() == num_threads || 1234 (m_continue_c_tids.empty() && 1235 m_continue_C_tids.empty() && 1236 m_continue_s_tids.empty() && 1237 m_continue_S_tids.empty())) 1238 { 1239 // All threads are continuing, just send a "c" packet 1240 continue_packet.PutCString ("c"); 1241 } 1242 else 1243 { 1244 continue_packet.PutCString ("vCont"); 1245 1246 if (!m_continue_c_tids.empty()) 1247 { 1248 if (m_gdb_comm.GetVContSupported ('c')) 1249 { 1250 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) 1251 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1252 } 1253 else 1254 continue_packet_error = true; 1255 } 1256 1257 if (!continue_packet_error && !m_continue_C_tids.empty()) 1258 { 1259 if (m_gdb_comm.GetVContSupported ('C')) 1260 { 1261 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) 1262 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1263 } 1264 else 1265 continue_packet_error = true; 1266 } 1267 1268 if (!continue_packet_error && !m_continue_s_tids.empty()) 1269 { 1270 if (m_gdb_comm.GetVContSupported ('s')) 1271 { 1272 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) 1273 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1274 } 1275 else 1276 continue_packet_error = true; 1277 } 1278 1279 if (!continue_packet_error && !m_continue_S_tids.empty()) 1280 { 1281 if (m_gdb_comm.GetVContSupported ('S')) 1282 { 1283 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) 1284 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1285 } 1286 else 1287 continue_packet_error = true; 1288 } 1289 1290 if (continue_packet_error) 1291 continue_packet.GetString().clear(); 1292 } 1293 } 1294 else 1295 continue_packet_error = true; 1296 1297 if (continue_packet_error) 1298 { 1299 // Either no vCont support, or we tried to use part of the vCont 1300 // packet that wasn't supported by the remote GDB server. 1301 // We need to try and make a simple packet that can do our continue 1302 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1303 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1304 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1305 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1306 if (num_continue_c_tids > 0) 1307 { 1308 if (num_continue_c_tids == num_threads) 1309 { 1310 // All threads are resuming... 1311 m_gdb_comm.SetCurrentThreadForRun (-1); 1312 continue_packet.PutChar ('c'); 1313 continue_packet_error = false; 1314 } 1315 else if (num_continue_c_tids == 1 && 1316 num_continue_C_tids == 0 && 1317 num_continue_s_tids == 0 && 1318 num_continue_S_tids == 0 ) 1319 { 1320 // Only one thread is continuing 1321 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1322 continue_packet.PutChar ('c'); 1323 continue_packet_error = false; 1324 } 1325 } 1326 1327 if (continue_packet_error && num_continue_C_tids > 0) 1328 { 1329 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1330 num_continue_C_tids > 0 && 1331 num_continue_s_tids == 0 && 1332 num_continue_S_tids == 0 ) 1333 { 1334 const int continue_signo = m_continue_C_tids.front().second; 1335 // Only one thread is continuing 1336 if (num_continue_C_tids > 1) 1337 { 1338 // More that one thread with a signal, yet we don't have 1339 // vCont support and we are being asked to resume each 1340 // thread with a signal, we need to make sure they are 1341 // all the same signal, or we can't issue the continue 1342 // accurately with the current support... 1343 if (num_continue_C_tids > 1) 1344 { 1345 continue_packet_error = false; 1346 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1347 { 1348 if (m_continue_C_tids[i].second != continue_signo) 1349 continue_packet_error = true; 1350 } 1351 } 1352 if (!continue_packet_error) 1353 m_gdb_comm.SetCurrentThreadForRun (-1); 1354 } 1355 else 1356 { 1357 // Set the continue thread ID 1358 continue_packet_error = false; 1359 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1360 } 1361 if (!continue_packet_error) 1362 { 1363 // Add threads continuing with the same signo... 1364 continue_packet.Printf("C%2.2x", continue_signo); 1365 } 1366 } 1367 } 1368 1369 if (continue_packet_error && num_continue_s_tids > 0) 1370 { 1371 if (num_continue_s_tids == num_threads) 1372 { 1373 // All threads are resuming... 1374 m_gdb_comm.SetCurrentThreadForRun (-1); 1375 continue_packet.PutChar ('s'); 1376 continue_packet_error = false; 1377 } 1378 else if (num_continue_c_tids == 0 && 1379 num_continue_C_tids == 0 && 1380 num_continue_s_tids == 1 && 1381 num_continue_S_tids == 0 ) 1382 { 1383 // Only one thread is stepping 1384 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1385 continue_packet.PutChar ('s'); 1386 continue_packet_error = false; 1387 } 1388 } 1389 1390 if (!continue_packet_error && num_continue_S_tids > 0) 1391 { 1392 if (num_continue_S_tids == num_threads) 1393 { 1394 const int step_signo = m_continue_S_tids.front().second; 1395 // Are all threads trying to step with the same signal? 1396 continue_packet_error = false; 1397 if (num_continue_S_tids > 1) 1398 { 1399 for (size_t i=1; i<num_threads; ++i) 1400 { 1401 if (m_continue_S_tids[i].second != step_signo) 1402 continue_packet_error = true; 1403 } 1404 } 1405 if (!continue_packet_error) 1406 { 1407 // Add threads stepping with the same signo... 1408 m_gdb_comm.SetCurrentThreadForRun (-1); 1409 continue_packet.Printf("S%2.2x", step_signo); 1410 } 1411 } 1412 else if (num_continue_c_tids == 0 && 1413 num_continue_C_tids == 0 && 1414 num_continue_s_tids == 0 && 1415 num_continue_S_tids == 1 ) 1416 { 1417 // Only one thread is stepping with signal 1418 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1419 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1420 continue_packet_error = false; 1421 } 1422 } 1423 } 1424 1425 if (continue_packet_error) 1426 { 1427 error.SetErrorString ("can't make continue packet for this resume"); 1428 } 1429 else 1430 { 1431 EventSP event_sp; 1432 TimeValue timeout; 1433 timeout = TimeValue::Now(); 1434 timeout.OffsetWithSeconds (5); 1435 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1436 { 1437 error.SetErrorString ("Trying to resume but the async thread is dead."); 1438 if (log) 1439 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1440 return error; 1441 } 1442 1443 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1444 1445 if (listener.WaitForEvent (&timeout, event_sp) == false) 1446 { 1447 error.SetErrorString("Resume timed out."); 1448 if (log) 1449 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1450 } 1451 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1452 { 1453 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1454 if (log) 1455 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1456 return error; 1457 } 1458 } 1459 } 1460 1461 return error; 1462 } 1463 1464 void 1465 ProcessGDBRemote::ClearThreadIDList () 1466 { 1467 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1468 m_thread_ids.clear(); 1469 } 1470 1471 bool 1472 ProcessGDBRemote::UpdateThreadIDList () 1473 { 1474 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1475 bool sequence_mutex_unavailable = false; 1476 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1477 if (sequence_mutex_unavailable) 1478 { 1479 return false; // We just didn't get the list 1480 } 1481 return true; 1482 } 1483 1484 bool 1485 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1486 { 1487 // locker will keep a mutex locked until it goes out of scope 1488 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1489 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1490 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1491 1492 size_t num_thread_ids = m_thread_ids.size(); 1493 // The "m_thread_ids" thread ID list should always be updated after each stop 1494 // reply packet, but in case it isn't, update it here. 1495 if (num_thread_ids == 0) 1496 { 1497 if (!UpdateThreadIDList ()) 1498 return false; 1499 num_thread_ids = m_thread_ids.size(); 1500 } 1501 1502 ThreadList old_thread_list_copy(old_thread_list); 1503 if (num_thread_ids > 0) 1504 { 1505 for (size_t i=0; i<num_thread_ids; ++i) 1506 { 1507 tid_t tid = m_thread_ids[i]; 1508 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1509 if (!thread_sp) 1510 { 1511 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1512 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1513 log->Printf( 1514 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1515 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1516 thread_sp->GetID()); 1517 } 1518 else 1519 { 1520 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1521 log->Printf( 1522 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1523 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1524 thread_sp->GetID()); 1525 } 1526 new_thread_list.AddThread(thread_sp); 1527 } 1528 } 1529 1530 // Whatever that is left in old_thread_list_copy are not 1531 // present in new_thread_list. Remove non-existent threads from internal id table. 1532 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1533 for (size_t i=0; i<old_num_thread_ids; i++) 1534 { 1535 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1536 if (old_thread_sp) 1537 { 1538 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1539 m_thread_id_to_index_id_map.erase(old_thread_id); 1540 } 1541 } 1542 1543 return true; 1544 } 1545 1546 1547 StateType 1548 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1549 { 1550 stop_packet.SetFilePos (0); 1551 const char stop_type = stop_packet.GetChar(); 1552 switch (stop_type) 1553 { 1554 case 'T': 1555 case 'S': 1556 { 1557 // This is a bit of a hack, but is is required. If we did exec, we 1558 // need to clear our thread lists and also know to rebuild our dynamic 1559 // register info before we lookup and threads and populate the expedited 1560 // register values so we need to know this right away so we can cleanup 1561 // and update our registers. 1562 const uint32_t stop_id = GetStopID(); 1563 if (stop_id == 0) 1564 { 1565 // Our first stop, make sure we have a process ID, and also make 1566 // sure we know about our registers 1567 if (GetID() == LLDB_INVALID_PROCESS_ID) 1568 { 1569 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1570 if (pid != LLDB_INVALID_PROCESS_ID) 1571 SetID (pid); 1572 } 1573 BuildDynamicRegisterInfo (true); 1574 } 1575 // Stop with signal and thread info 1576 const uint8_t signo = stop_packet.GetHexU8(); 1577 std::string name; 1578 std::string value; 1579 std::string thread_name; 1580 std::string reason; 1581 std::string description; 1582 uint32_t exc_type = 0; 1583 std::vector<addr_t> exc_data; 1584 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1585 ThreadSP thread_sp; 1586 ThreadGDBRemote *gdb_thread = NULL; 1587 1588 while (stop_packet.GetNameColonValue(name, value)) 1589 { 1590 if (name.compare("metype") == 0) 1591 { 1592 // exception type in big endian hex 1593 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1594 } 1595 else if (name.compare("medata") == 0) 1596 { 1597 // exception data in big endian hex 1598 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1599 } 1600 else if (name.compare("thread") == 0) 1601 { 1602 // thread in big endian hex 1603 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1604 // m_thread_list_real does have its own mutex, but we need to 1605 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1606 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1607 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1608 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1609 1610 if (!thread_sp) 1611 { 1612 // Create the thread if we need to 1613 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1614 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1615 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1616 log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1617 __FUNCTION__, 1618 static_cast<void*>(thread_sp.get()), 1619 thread_sp->GetID()); 1620 1621 m_thread_list_real.AddThread(thread_sp); 1622 } 1623 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1624 1625 } 1626 else if (name.compare("threads") == 0) 1627 { 1628 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1629 m_thread_ids.clear(); 1630 // A comma separated list of all threads in the current 1631 // process that includes the thread for this stop reply 1632 // packet 1633 size_t comma_pos; 1634 lldb::tid_t tid; 1635 while ((comma_pos = value.find(',')) != std::string::npos) 1636 { 1637 value[comma_pos] = '\0'; 1638 // thread in big endian hex 1639 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1640 if (tid != LLDB_INVALID_THREAD_ID) 1641 m_thread_ids.push_back (tid); 1642 value.erase(0, comma_pos + 1); 1643 } 1644 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1645 if (tid != LLDB_INVALID_THREAD_ID) 1646 m_thread_ids.push_back (tid); 1647 } 1648 else if (name.compare("hexname") == 0) 1649 { 1650 StringExtractor name_extractor; 1651 // Swap "value" over into "name_extractor" 1652 name_extractor.GetStringRef().swap(value); 1653 // Now convert the HEX bytes into a string value 1654 name_extractor.GetHexByteString (value); 1655 thread_name.swap (value); 1656 } 1657 else if (name.compare("name") == 0) 1658 { 1659 thread_name.swap (value); 1660 } 1661 else if (name.compare("qaddr") == 0) 1662 { 1663 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1664 } 1665 else if (name.compare("reason") == 0) 1666 { 1667 reason.swap(value); 1668 } 1669 else if (name.compare("description") == 0) 1670 { 1671 StringExtractor desc_extractor; 1672 // Swap "value" over into "name_extractor" 1673 desc_extractor.GetStringRef().swap(value); 1674 // Now convert the HEX bytes into a string value 1675 desc_extractor.GetHexByteString (thread_name); 1676 } 1677 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1678 { 1679 // We have a register number that contains an expedited 1680 // register value. Lets supply this register to our thread 1681 // so it won't have to go and read it. 1682 if (gdb_thread) 1683 { 1684 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1685 1686 if (reg != UINT32_MAX) 1687 { 1688 StringExtractor reg_value_extractor; 1689 // Swap "value" over into "reg_value_extractor" 1690 reg_value_extractor.GetStringRef().swap(value); 1691 if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) 1692 { 1693 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1694 name.c_str(), 1695 reg, 1696 reg, 1697 reg_value_extractor.GetStringRef().c_str(), 1698 stop_packet.GetStringRef().c_str()); 1699 } 1700 } 1701 } 1702 } 1703 } 1704 1705 // If the response is old style 'S' packet which does not provide us with thread information 1706 // then update the thread list and choose the first one. 1707 if (!thread_sp) 1708 { 1709 UpdateThreadIDList (); 1710 1711 if (!m_thread_ids.empty ()) 1712 { 1713 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1714 thread_sp = m_thread_list_real.FindThreadByProtocolID (m_thread_ids.front (), false); 1715 if (thread_sp) 1716 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get ()); 1717 } 1718 } 1719 1720 if (thread_sp) 1721 { 1722 // Clear the stop info just in case we don't set it to anything 1723 thread_sp->SetStopInfo (StopInfoSP()); 1724 1725 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1726 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1727 if (exc_type != 0) 1728 { 1729 const size_t exc_data_size = exc_data.size(); 1730 1731 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1732 exc_type, 1733 exc_data_size, 1734 exc_data_size >= 1 ? exc_data[0] : 0, 1735 exc_data_size >= 2 ? exc_data[1] : 0, 1736 exc_data_size >= 3 ? exc_data[2] : 0)); 1737 } 1738 else 1739 { 1740 bool handled = false; 1741 bool did_exec = false; 1742 if (!reason.empty()) 1743 { 1744 if (reason.compare("trace") == 0) 1745 { 1746 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1747 handled = true; 1748 } 1749 else if (reason.compare("breakpoint") == 0) 1750 { 1751 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1752 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1753 if (bp_site_sp) 1754 { 1755 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1756 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1757 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1758 handled = true; 1759 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1760 { 1761 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1762 } 1763 else 1764 { 1765 StopInfoSP invalid_stop_info_sp; 1766 thread_sp->SetStopInfo (invalid_stop_info_sp); 1767 } 1768 } 1769 } 1770 else if (reason.compare("trap") == 0) 1771 { 1772 // Let the trap just use the standard signal stop reason below... 1773 } 1774 else if (reason.compare("watchpoint") == 0) 1775 { 1776 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1777 // TODO: locate the watchpoint somehow... 1778 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1779 handled = true; 1780 } 1781 else if (reason.compare("exception") == 0) 1782 { 1783 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1784 handled = true; 1785 } 1786 else if (reason.compare("exec") == 0) 1787 { 1788 did_exec = true; 1789 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 1790 handled = true; 1791 } 1792 } 1793 1794 if (!handled && signo && did_exec == false) 1795 { 1796 if (signo == SIGTRAP) 1797 { 1798 // Currently we are going to assume SIGTRAP means we are either 1799 // hitting a breakpoint or hardware single stepping. 1800 handled = true; 1801 addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; 1802 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1803 1804 if (bp_site_sp) 1805 { 1806 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1807 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1808 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1809 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1810 { 1811 if(m_breakpoint_pc_offset != 0) 1812 thread_sp->GetRegisterContext()->SetPC(pc); 1813 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1814 } 1815 else 1816 { 1817 StopInfoSP invalid_stop_info_sp; 1818 thread_sp->SetStopInfo (invalid_stop_info_sp); 1819 } 1820 } 1821 else 1822 { 1823 // If we were stepping then assume the stop was the result of the trace. If we were 1824 // not stepping then report the SIGTRAP. 1825 // FIXME: We are still missing the case where we single step over a trap instruction. 1826 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 1827 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1828 else 1829 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1830 } 1831 } 1832 if (!handled) 1833 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1834 } 1835 1836 if (!description.empty()) 1837 { 1838 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 1839 if (stop_info_sp) 1840 { 1841 stop_info_sp->SetDescription (description.c_str()); 1842 } 1843 else 1844 { 1845 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1846 } 1847 } 1848 } 1849 } 1850 return eStateStopped; 1851 } 1852 break; 1853 1854 case 'W': 1855 case 'X': 1856 // process exited 1857 return eStateExited; 1858 1859 default: 1860 break; 1861 } 1862 return eStateInvalid; 1863 } 1864 1865 void 1866 ProcessGDBRemote::RefreshStateAfterStop () 1867 { 1868 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1869 m_thread_ids.clear(); 1870 // Set the thread stop info. It might have a "threads" key whose value is 1871 // a list of all thread IDs in the current process, so m_thread_ids might 1872 // get set. 1873 SetThreadStopInfo (m_last_stop_packet); 1874 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1875 if (m_thread_ids.empty()) 1876 { 1877 // No, we need to fetch the thread list manually 1878 UpdateThreadIDList(); 1879 } 1880 1881 // Let all threads recover from stopping and do any clean up based 1882 // on the previous thread state (if any). 1883 m_thread_list_real.RefreshStateAfterStop(); 1884 1885 } 1886 1887 Error 1888 ProcessGDBRemote::DoHalt (bool &caused_stop) 1889 { 1890 Error error; 1891 1892 bool timed_out = false; 1893 Mutex::Locker locker; 1894 1895 if (m_public_state.GetValue() == eStateAttaching) 1896 { 1897 // We are being asked to halt during an attach. We need to just close 1898 // our file handle and debugserver will go away, and we can be done... 1899 m_gdb_comm.Disconnect(); 1900 } 1901 else 1902 { 1903 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1904 { 1905 if (timed_out) 1906 error.SetErrorString("timed out sending interrupt packet"); 1907 else 1908 error.SetErrorString("unknown error sending interrupt packet"); 1909 } 1910 1911 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1912 } 1913 return error; 1914 } 1915 1916 Error 1917 ProcessGDBRemote::DoDetach(bool keep_stopped) 1918 { 1919 Error error; 1920 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1921 if (log) 1922 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 1923 1924 error = m_gdb_comm.Detach (keep_stopped); 1925 if (log) 1926 { 1927 if (error.Success()) 1928 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1929 else 1930 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 1931 } 1932 1933 if (!error.Success()) 1934 return error; 1935 1936 // Sleep for one second to let the process get all detached... 1937 StopAsyncThread (); 1938 1939 SetPrivateState (eStateDetached); 1940 ResumePrivateStateThread(); 1941 1942 //KillDebugserverProcess (); 1943 return error; 1944 } 1945 1946 1947 Error 1948 ProcessGDBRemote::DoDestroy () 1949 { 1950 Error error; 1951 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1952 if (log) 1953 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1954 1955 // There is a bug in older iOS debugservers where they don't shut down the process 1956 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1957 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1958 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1959 // destroy it again. 1960 // 1961 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1962 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1963 // the debugservers with this bug are equal. There really should be a better way to test this! 1964 // 1965 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1966 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1967 // just do the straight-forward kill. 1968 // 1969 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1970 // necessary (or helpful) to do any of this. 1971 1972 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1973 { 1974 PlatformSP platform_sp = GetTarget().GetPlatform(); 1975 1976 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1977 if (platform_sp 1978 && platform_sp->GetName() 1979 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 1980 { 1981 if (m_destroy_tried_resuming) 1982 { 1983 if (log) 1984 log->PutCString ("ProcessGDBRemote::DoDestroy() - Tried resuming to destroy once already, not doing it again."); 1985 } 1986 else 1987 { 1988 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1989 // but we really need it to happen here and it doesn't matter if we do it twice. 1990 m_thread_list.DiscardThreadPlans(); 1991 DisableAllBreakpointSites(); 1992 1993 bool stop_looks_like_crash = false; 1994 ThreadList &threads = GetThreadList(); 1995 1996 { 1997 Mutex::Locker locker(threads.GetMutex()); 1998 1999 size_t num_threads = threads.GetSize(); 2000 for (size_t i = 0; i < num_threads; i++) 2001 { 2002 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 2003 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 2004 StopReason reason = eStopReasonInvalid; 2005 if (stop_info_sp) 2006 reason = stop_info_sp->GetStopReason(); 2007 if (reason == eStopReasonBreakpoint 2008 || reason == eStopReasonException) 2009 { 2010 if (log) 2011 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 2012 thread_sp->GetProtocolID(), 2013 stop_info_sp->GetDescription()); 2014 stop_looks_like_crash = true; 2015 break; 2016 } 2017 } 2018 } 2019 2020 if (stop_looks_like_crash) 2021 { 2022 if (log) 2023 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 2024 m_destroy_tried_resuming = true; 2025 2026 // If we are going to run again before killing, it would be good to suspend all the threads 2027 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 2028 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 2029 // have to run the risk of letting those threads proceed a bit. 2030 2031 { 2032 Mutex::Locker locker(threads.GetMutex()); 2033 2034 size_t num_threads = threads.GetSize(); 2035 for (size_t i = 0; i < num_threads; i++) 2036 { 2037 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 2038 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 2039 StopReason reason = eStopReasonInvalid; 2040 if (stop_info_sp) 2041 reason = stop_info_sp->GetStopReason(); 2042 if (reason != eStopReasonBreakpoint 2043 && reason != eStopReasonException) 2044 { 2045 if (log) 2046 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 2047 thread_sp->GetProtocolID()); 2048 thread_sp->SetResumeState(eStateSuspended); 2049 } 2050 } 2051 } 2052 Resume (); 2053 return Destroy(); 2054 } 2055 } 2056 } 2057 } 2058 2059 // Interrupt if our inferior is running... 2060 int exit_status = SIGABRT; 2061 std::string exit_string; 2062 2063 if (m_gdb_comm.IsConnected()) 2064 { 2065 if (m_public_state.GetValue() != eStateAttaching) 2066 { 2067 2068 StringExtractorGDBRemote response; 2069 bool send_async = true; 2070 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 2071 2072 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) 2073 { 2074 char packet_cmd = response.GetChar(0); 2075 2076 if (packet_cmd == 'W' || packet_cmd == 'X') 2077 { 2078 #if defined(__APPLE__) 2079 // For Native processes on Mac OS X, we launch through the Host Platform, then hand the process off 2080 // to debugserver, which becomes the parent process through "PT_ATTACH". Then when we go to kill 2081 // the process on Mac OS X we call ptrace(PT_KILL) to kill it, then we call waitpid which returns 2082 // with no error and the correct status. But amusingly enough that doesn't seem to actually reap 2083 // the process, but instead it is left around as a Zombie. Probably the kernel is in the process of 2084 // switching ownership back to lldb which was the original parent, and gets confused in the handoff. 2085 // Anyway, so call waitpid here to finally reap it. 2086 PlatformSP platform_sp(GetTarget().GetPlatform()); 2087 if (platform_sp && platform_sp->IsHost()) 2088 { 2089 int status; 2090 ::pid_t reap_pid; 2091 reap_pid = waitpid (GetID(), &status, WNOHANG); 2092 if (log) 2093 log->Printf ("Reaped pid: %d, status: %d.\n", reap_pid, status); 2094 } 2095 #endif 2096 SetLastStopPacket (response); 2097 ClearThreadIDList (); 2098 exit_status = response.GetHexU8(); 2099 } 2100 else 2101 { 2102 if (log) 2103 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2104 exit_string.assign("got unexpected response to k packet: "); 2105 exit_string.append(response.GetStringRef()); 2106 } 2107 } 2108 else 2109 { 2110 if (log) 2111 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2112 exit_string.assign("failed to send the k packet"); 2113 } 2114 2115 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 2116 } 2117 else 2118 { 2119 if (log) 2120 log->Printf ("ProcessGDBRemote::DoDestroy - killed or interrupted while attaching"); 2121 exit_string.assign ("killed or interrupted while attaching."); 2122 } 2123 } 2124 else 2125 { 2126 // If we missed setting the exit status on the way out, do it here. 2127 // NB set exit status can be called multiple times, the first one sets the status. 2128 exit_string.assign("destroying when not connected to debugserver"); 2129 } 2130 2131 SetExitStatus(exit_status, exit_string.c_str()); 2132 2133 StopAsyncThread (); 2134 KillDebugserverProcess (); 2135 return error; 2136 } 2137 2138 void 2139 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 2140 { 2141 lldb_private::Mutex::Locker locker (m_last_stop_packet_mutex); 2142 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 2143 if (did_exec) 2144 { 2145 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2146 if (log) 2147 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 2148 2149 m_thread_list_real.Clear(); 2150 m_thread_list.Clear(); 2151 BuildDynamicRegisterInfo (true); 2152 m_gdb_comm.ResetDiscoverableSettings(); 2153 } 2154 m_last_stop_packet = response; 2155 } 2156 2157 2158 //------------------------------------------------------------------ 2159 // Process Queries 2160 //------------------------------------------------------------------ 2161 2162 bool 2163 ProcessGDBRemote::IsAlive () 2164 { 2165 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2166 } 2167 2168 addr_t 2169 ProcessGDBRemote::GetImageInfoAddress() 2170 { 2171 return m_gdb_comm.GetShlibInfoAddr(); 2172 } 2173 2174 //------------------------------------------------------------------ 2175 // Process Memory 2176 //------------------------------------------------------------------ 2177 size_t 2178 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2179 { 2180 GetMaxMemorySize (); 2181 if (size > m_max_memory_size) 2182 { 2183 // Keep memory read sizes down to a sane limit. This function will be 2184 // called multiple times in order to complete the task by 2185 // lldb_private::Process so it is ok to do this. 2186 size = m_max_memory_size; 2187 } 2188 2189 char packet[64]; 2190 int packet_len; 2191 bool binary_memory_read = m_gdb_comm.GetxPacketSupported(); 2192 if (binary_memory_read) 2193 { 2194 packet_len = ::snprintf (packet, sizeof(packet), "x0x%" PRIx64 ",0x%" PRIx64, (uint64_t)addr, (uint64_t)size); 2195 } 2196 else 2197 { 2198 packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2199 } 2200 assert (packet_len + 1 < (int)sizeof(packet)); 2201 StringExtractorGDBRemote response; 2202 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) 2203 { 2204 if (response.IsNormalResponse()) 2205 { 2206 error.Clear(); 2207 if (binary_memory_read) 2208 { 2209 // The lower level GDBRemoteCommunication packet receive layer has already de-quoted any 2210 // 0x7d character escaping that was present in the packet 2211 2212 size_t data_received_size = response.GetBytesLeft(); 2213 if (data_received_size > size) 2214 { 2215 // Don't write past the end of BUF if the remote debug server gave us too 2216 // much data for some reason. 2217 data_received_size = size; 2218 } 2219 memcpy (buf, response.GetStringRef().data(), data_received_size); 2220 return data_received_size; 2221 } 2222 else 2223 { 2224 return response.GetHexBytes(buf, size, '\xdd'); 2225 } 2226 } 2227 else if (response.IsErrorResponse()) 2228 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2229 else if (response.IsUnsupportedResponse()) 2230 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2231 else 2232 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2233 } 2234 else 2235 { 2236 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2237 } 2238 return 0; 2239 } 2240 2241 size_t 2242 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2243 { 2244 GetMaxMemorySize (); 2245 if (size > m_max_memory_size) 2246 { 2247 // Keep memory read sizes down to a sane limit. This function will be 2248 // called multiple times in order to complete the task by 2249 // lldb_private::Process so it is ok to do this. 2250 size = m_max_memory_size; 2251 } 2252 2253 StreamString packet; 2254 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2255 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2256 StringExtractorGDBRemote response; 2257 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) 2258 { 2259 if (response.IsOKResponse()) 2260 { 2261 error.Clear(); 2262 return size; 2263 } 2264 else if (response.IsErrorResponse()) 2265 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2266 else if (response.IsUnsupportedResponse()) 2267 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2268 else 2269 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2270 } 2271 else 2272 { 2273 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 2274 } 2275 return 0; 2276 } 2277 2278 lldb::addr_t 2279 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2280 { 2281 lldb_private::Log *log (lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_EXPRESSIONS)); 2282 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2283 2284 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2285 switch (supported) 2286 { 2287 case eLazyBoolCalculate: 2288 case eLazyBoolYes: 2289 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2290 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2291 return allocated_addr; 2292 2293 case eLazyBoolNo: 2294 // Call mmap() to create memory in the inferior.. 2295 unsigned prot = 0; 2296 if (permissions & lldb::ePermissionsReadable) 2297 prot |= eMmapProtRead; 2298 if (permissions & lldb::ePermissionsWritable) 2299 prot |= eMmapProtWrite; 2300 if (permissions & lldb::ePermissionsExecutable) 2301 prot |= eMmapProtExec; 2302 2303 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2304 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2305 m_addr_to_mmap_size[allocated_addr] = size; 2306 else 2307 { 2308 allocated_addr = LLDB_INVALID_ADDRESS; 2309 if (log) 2310 log->Printf ("ProcessGDBRemote::%s no direct stub support for memory allocation, and InferiorCallMmap also failed - is stub missing register context save/restore capability?", __FUNCTION__); 2311 } 2312 break; 2313 } 2314 2315 if (allocated_addr == LLDB_INVALID_ADDRESS) 2316 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2317 else 2318 error.Clear(); 2319 return allocated_addr; 2320 } 2321 2322 Error 2323 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2324 MemoryRegionInfo ®ion_info) 2325 { 2326 2327 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2328 return error; 2329 } 2330 2331 Error 2332 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2333 { 2334 2335 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2336 return error; 2337 } 2338 2339 Error 2340 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2341 { 2342 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2343 return error; 2344 } 2345 2346 Error 2347 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2348 { 2349 Error error; 2350 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2351 2352 switch (supported) 2353 { 2354 case eLazyBoolCalculate: 2355 // We should never be deallocating memory without allocating memory 2356 // first so we should never get eLazyBoolCalculate 2357 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2358 break; 2359 2360 case eLazyBoolYes: 2361 if (!m_gdb_comm.DeallocateMemory (addr)) 2362 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2363 break; 2364 2365 case eLazyBoolNo: 2366 // Call munmap() to deallocate memory in the inferior.. 2367 { 2368 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2369 if (pos != m_addr_to_mmap_size.end() && 2370 InferiorCallMunmap(this, addr, pos->second)) 2371 m_addr_to_mmap_size.erase (pos); 2372 else 2373 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2374 } 2375 break; 2376 } 2377 2378 return error; 2379 } 2380 2381 2382 //------------------------------------------------------------------ 2383 // Process STDIO 2384 //------------------------------------------------------------------ 2385 size_t 2386 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2387 { 2388 if (m_stdio_communication.IsConnected()) 2389 { 2390 ConnectionStatus status; 2391 m_stdio_communication.Write(src, src_len, status, NULL); 2392 } 2393 return 0; 2394 } 2395 2396 Error 2397 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2398 { 2399 Error error; 2400 assert(bp_site != NULL); 2401 2402 // Get logging info 2403 Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2404 user_id_t site_id = bp_site->GetID(); 2405 2406 // Get the breakpoint address 2407 const addr_t addr = bp_site->GetLoadAddress(); 2408 2409 // Log that a breakpoint was requested 2410 if (log) 2411 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2412 2413 // Breakpoint already exists and is enabled 2414 if (bp_site->IsEnabled()) 2415 { 2416 if (log) 2417 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2418 return error; 2419 } 2420 2421 // Get the software breakpoint trap opcode size 2422 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2423 2424 // SupportsGDBStoppointPacket() simply checks a boolean, indicating if this breakpoint type 2425 // is supported by the remote stub. These are set to true by default, and later set to false 2426 // only after we receive an unimplemented response when sending a breakpoint packet. This means 2427 // initially that unless we were specifically instructed to use a hardware breakpoint, LLDB will 2428 // attempt to set a software breakpoint. HardwareRequired() also queries a boolean variable which 2429 // indicates if the user specifically asked for hardware breakpoints. If true then we will 2430 // skip over software breakpoints. 2431 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware) && (!bp_site->HardwareRequired())) 2432 { 2433 // Try to send off a software breakpoint packet ($Z0) 2434 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2435 { 2436 // The breakpoint was placed successfully 2437 bp_site->SetEnabled(true); 2438 bp_site->SetType(BreakpointSite::eExternal); 2439 return error; 2440 } 2441 2442 // SendGDBStoppointTypePacket() will return an error if it was unable to set this 2443 // breakpoint. We need to differentiate between a error specific to placing this breakpoint 2444 // or if we have learned that this breakpoint type is unsupported. To do this, we 2445 // must test the support boolean for this breakpoint type to see if it now indicates that 2446 // this breakpoint type is unsupported. If they are still supported then we should return 2447 // with the error code. If they are now unsupported, then we would like to fall through 2448 // and try another form of breakpoint. 2449 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware)) 2450 return error; 2451 2452 // We reach here when software breakpoints have been found to be unsupported. For future 2453 // calls to set a breakpoint, we will not attempt to set a breakpoint with a type that is 2454 // known not to be supported. 2455 if (log) 2456 log->Printf("Software breakpoints are unsupported"); 2457 2458 // So we will fall through and try a hardware breakpoint 2459 } 2460 2461 // The process of setting a hardware breakpoint is much the same as above. We check the 2462 // supported boolean for this breakpoint type, and if it is thought to be supported then we 2463 // will try to set this breakpoint with a hardware breakpoint. 2464 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 2465 { 2466 // Try to send off a hardware breakpoint packet ($Z1) 2467 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2468 { 2469 // The breakpoint was placed successfully 2470 bp_site->SetEnabled(true); 2471 bp_site->SetType(BreakpointSite::eHardware); 2472 return error; 2473 } 2474 2475 // Check if the error was something other then an unsupported breakpoint type 2476 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 2477 { 2478 // Unable to set this hardware breakpoint 2479 error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); 2480 return error; 2481 } 2482 2483 // We will reach here when the stub gives an unsupported response to a hardware breakpoint 2484 if (log) 2485 log->Printf("Hardware breakpoints are unsupported"); 2486 2487 // Finally we will falling through to a #trap style breakpoint 2488 } 2489 2490 // Don't fall through when hardware breakpoints were specifically requested 2491 if (bp_site->HardwareRequired()) 2492 { 2493 error.SetErrorString("hardware breakpoints are not supported"); 2494 return error; 2495 } 2496 2497 // As a last resort we want to place a manual breakpoint. An instruction 2498 // is placed into the process memory using memory write packets. 2499 return EnableSoftwareBreakpoint(bp_site); 2500 } 2501 2502 Error 2503 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2504 { 2505 Error error; 2506 assert (bp_site != NULL); 2507 addr_t addr = bp_site->GetLoadAddress(); 2508 user_id_t site_id = bp_site->GetID(); 2509 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2510 if (log) 2511 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2512 2513 if (bp_site->IsEnabled()) 2514 { 2515 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2516 2517 BreakpointSite::Type bp_type = bp_site->GetType(); 2518 switch (bp_type) 2519 { 2520 case BreakpointSite::eSoftware: 2521 error = DisableSoftwareBreakpoint (bp_site); 2522 break; 2523 2524 case BreakpointSite::eHardware: 2525 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, false, addr, bp_op_size)) 2526 error.SetErrorToGenericError(); 2527 break; 2528 2529 case BreakpointSite::eExternal: 2530 { 2531 GDBStoppointType stoppoint_type; 2532 if (bp_site->IsHardware()) 2533 stoppoint_type = eBreakpointHardware; 2534 else 2535 stoppoint_type = eBreakpointSoftware; 2536 2537 if (m_gdb_comm.SendGDBStoppointTypePacket(stoppoint_type, false, addr, bp_op_size)) 2538 error.SetErrorToGenericError(); 2539 } 2540 break; 2541 } 2542 if (error.Success()) 2543 bp_site->SetEnabled(false); 2544 } 2545 else 2546 { 2547 if (log) 2548 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2549 return error; 2550 } 2551 2552 if (error.Success()) 2553 error.SetErrorToGenericError(); 2554 return error; 2555 } 2556 2557 // Pre-requisite: wp != NULL. 2558 static GDBStoppointType 2559 GetGDBStoppointType (Watchpoint *wp) 2560 { 2561 assert(wp); 2562 bool watch_read = wp->WatchpointRead(); 2563 bool watch_write = wp->WatchpointWrite(); 2564 2565 // watch_read and watch_write cannot both be false. 2566 assert(watch_read || watch_write); 2567 if (watch_read && watch_write) 2568 return eWatchpointReadWrite; 2569 else if (watch_read) 2570 return eWatchpointRead; 2571 else // Must be watch_write, then. 2572 return eWatchpointWrite; 2573 } 2574 2575 Error 2576 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2577 { 2578 Error error; 2579 if (wp) 2580 { 2581 user_id_t watchID = wp->GetID(); 2582 addr_t addr = wp->GetLoadAddress(); 2583 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2584 if (log) 2585 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2586 if (wp->IsEnabled()) 2587 { 2588 if (log) 2589 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2590 return error; 2591 } 2592 2593 GDBStoppointType type = GetGDBStoppointType(wp); 2594 // Pass down an appropriate z/Z packet... 2595 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2596 { 2597 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2598 { 2599 wp->SetEnabled(true, notify); 2600 return error; 2601 } 2602 else 2603 error.SetErrorString("sending gdb watchpoint packet failed"); 2604 } 2605 else 2606 error.SetErrorString("watchpoints not supported"); 2607 } 2608 else 2609 { 2610 error.SetErrorString("Watchpoint argument was NULL."); 2611 } 2612 if (error.Success()) 2613 error.SetErrorToGenericError(); 2614 return error; 2615 } 2616 2617 Error 2618 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2619 { 2620 Error error; 2621 if (wp) 2622 { 2623 user_id_t watchID = wp->GetID(); 2624 2625 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2626 2627 addr_t addr = wp->GetLoadAddress(); 2628 2629 if (log) 2630 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2631 2632 if (!wp->IsEnabled()) 2633 { 2634 if (log) 2635 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2636 // See also 'class WatchpointSentry' within StopInfo.cpp. 2637 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2638 // the watchpoint object to intelligently process this action. 2639 wp->SetEnabled(false, notify); 2640 return error; 2641 } 2642 2643 if (wp->IsHardware()) 2644 { 2645 GDBStoppointType type = GetGDBStoppointType(wp); 2646 // Pass down an appropriate z/Z packet... 2647 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2648 { 2649 wp->SetEnabled(false, notify); 2650 return error; 2651 } 2652 else 2653 error.SetErrorString("sending gdb watchpoint packet failed"); 2654 } 2655 // TODO: clear software watchpoints if we implement them 2656 } 2657 else 2658 { 2659 error.SetErrorString("Watchpoint argument was NULL."); 2660 } 2661 if (error.Success()) 2662 error.SetErrorToGenericError(); 2663 return error; 2664 } 2665 2666 void 2667 ProcessGDBRemote::Clear() 2668 { 2669 m_flags = 0; 2670 m_thread_list_real.Clear(); 2671 m_thread_list.Clear(); 2672 } 2673 2674 Error 2675 ProcessGDBRemote::DoSignal (int signo) 2676 { 2677 Error error; 2678 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2679 if (log) 2680 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2681 2682 if (!m_gdb_comm.SendAsyncSignal (signo)) 2683 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2684 return error; 2685 } 2686 2687 Error 2688 ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) 2689 { 2690 Error error; 2691 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2692 { 2693 // If we locate debugserver, keep that located version around 2694 static FileSpec g_debugserver_file_spec; 2695 2696 ProcessLaunchInfo debugserver_launch_info; 2697 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2698 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2699 2700 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 2701 // On iOS, still do a local connection using a random port 2702 const char *hostname = "127.0.0.1"; 2703 uint16_t port = get_random_port (); 2704 #else 2705 // Set hostname being NULL to do the reverse connect where debugserver 2706 // will bind to port zero and it will communicate back to us the port 2707 // that we will connect to 2708 const char *hostname = NULL; 2709 uint16_t port = 0; 2710 #endif 2711 2712 error = m_gdb_comm.StartDebugserverProcess (hostname, 2713 port, 2714 debugserver_launch_info, 2715 port); 2716 2717 if (error.Success ()) 2718 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2719 else 2720 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2721 2722 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2723 StartAsyncThread (); 2724 2725 if (error.Fail()) 2726 { 2727 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2728 2729 if (log) 2730 log->Printf("failed to start debugserver process: %s", error.AsCString()); 2731 return error; 2732 } 2733 2734 if (m_gdb_comm.IsConnected()) 2735 { 2736 // Finish the connection process by doing the handshake without connecting (send NULL URL) 2737 ConnectToDebugserver (NULL); 2738 } 2739 else 2740 { 2741 StreamString connect_url; 2742 connect_url.Printf("connect://%s:%u", hostname, port); 2743 error = ConnectToDebugserver (connect_url.GetString().c_str()); 2744 } 2745 2746 } 2747 return error; 2748 } 2749 2750 bool 2751 ProcessGDBRemote::MonitorDebugserverProcess 2752 ( 2753 void *callback_baton, 2754 lldb::pid_t debugserver_pid, 2755 bool exited, // True if the process did exit 2756 int signo, // Zero for no signal 2757 int exit_status // Exit value of process if signal is zero 2758 ) 2759 { 2760 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2761 // and might not exist anymore, so we need to carefully try to get the 2762 // target for this process first since we have a race condition when 2763 // we are done running between getting the notice that the inferior 2764 // process has died and the debugserver that was debugging this process. 2765 // In our test suite, we are also continually running process after 2766 // process, so we must be very careful to make sure: 2767 // 1 - process object hasn't been deleted already 2768 // 2 - that a new process object hasn't been recreated in its place 2769 2770 // "debugserver_pid" argument passed in is the process ID for 2771 // debugserver that we are tracking... 2772 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2773 2774 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2775 2776 // Get a shared pointer to the target that has a matching process pointer. 2777 // This target could be gone, or the target could already have a new process 2778 // object inside of it 2779 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2780 2781 if (log) 2782 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2783 2784 if (target_sp) 2785 { 2786 // We found a process in a target that matches, but another thread 2787 // might be in the process of launching a new process that will 2788 // soon replace it, so get a shared pointer to the process so we 2789 // can keep it alive. 2790 ProcessSP process_sp (target_sp->GetProcessSP()); 2791 // Now we have a shared pointer to the process that can't go away on us 2792 // so we now make sure it was the same as the one passed in, and also make 2793 // sure that our previous "process *" didn't get deleted and have a new 2794 // "process *" created in its place with the same pointer. To verify this 2795 // we make sure the process has our debugserver process ID. If we pass all 2796 // of these tests, then we are sure that this process is the one we were 2797 // looking for. 2798 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2799 { 2800 // Sleep for a half a second to make sure our inferior process has 2801 // time to set its exit status before we set it incorrectly when 2802 // both the debugserver and the inferior process shut down. 2803 usleep (500000); 2804 // If our process hasn't yet exited, debugserver might have died. 2805 // If the process did exit, the we are reaping it. 2806 const StateType state = process->GetState(); 2807 2808 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2809 state != eStateInvalid && 2810 state != eStateUnloaded && 2811 state != eStateExited && 2812 state != eStateDetached) 2813 { 2814 char error_str[1024]; 2815 if (signo) 2816 { 2817 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2818 if (signal_cstr) 2819 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2820 else 2821 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2822 } 2823 else 2824 { 2825 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2826 } 2827 2828 process->SetExitStatus (-1, error_str); 2829 } 2830 // Debugserver has exited we need to let our ProcessGDBRemote 2831 // know that it no longer has a debugserver instance 2832 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2833 } 2834 } 2835 return true; 2836 } 2837 2838 void 2839 ProcessGDBRemote::KillDebugserverProcess () 2840 { 2841 m_gdb_comm.Disconnect(); 2842 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2843 { 2844 Host::Kill (m_debugserver_pid, SIGINT); 2845 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2846 } 2847 } 2848 2849 void 2850 ProcessGDBRemote::Initialize() 2851 { 2852 static bool g_initialized = false; 2853 2854 if (g_initialized == false) 2855 { 2856 g_initialized = true; 2857 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2858 GetPluginDescriptionStatic(), 2859 CreateInstance, 2860 DebuggerInitialize); 2861 2862 Log::Callbacks log_callbacks = { 2863 ProcessGDBRemoteLog::DisableLog, 2864 ProcessGDBRemoteLog::EnableLog, 2865 ProcessGDBRemoteLog::ListLogCategories 2866 }; 2867 2868 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2869 } 2870 } 2871 2872 void 2873 ProcessGDBRemote::DebuggerInitialize (lldb_private::Debugger &debugger) 2874 { 2875 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 2876 { 2877 const bool is_global_setting = true; 2878 PluginManager::CreateSettingForProcessPlugin (debugger, 2879 GetGlobalPluginProperties()->GetValueProperties(), 2880 ConstString ("Properties for the gdb-remote process plug-in."), 2881 is_global_setting); 2882 } 2883 } 2884 2885 bool 2886 ProcessGDBRemote::StartAsyncThread () 2887 { 2888 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2889 2890 if (log) 2891 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2892 2893 Mutex::Locker start_locker(m_async_thread_state_mutex); 2894 if (m_async_thread_state == eAsyncThreadNotStarted) 2895 { 2896 // Create a thread that watches our internal state and controls which 2897 // events make it to clients (into the DCProcess event queue). 2898 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2899 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2900 { 2901 m_async_thread_state = eAsyncThreadRunning; 2902 return true; 2903 } 2904 else 2905 return false; 2906 } 2907 else 2908 { 2909 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2910 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2911 if (log) 2912 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2913 if (m_async_thread_state == eAsyncThreadRunning) 2914 return true; 2915 else 2916 return false; 2917 } 2918 } 2919 2920 void 2921 ProcessGDBRemote::StopAsyncThread () 2922 { 2923 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2924 2925 if (log) 2926 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2927 2928 Mutex::Locker start_locker(m_async_thread_state_mutex); 2929 if (m_async_thread_state == eAsyncThreadRunning) 2930 { 2931 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2932 2933 // This will shut down the async thread. 2934 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2935 2936 // Stop the stdio thread 2937 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2938 { 2939 Host::ThreadJoin (m_async_thread, NULL, NULL); 2940 } 2941 m_async_thread_state = eAsyncThreadDone; 2942 } 2943 else 2944 { 2945 if (log) 2946 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2947 } 2948 } 2949 2950 2951 thread_result_t 2952 ProcessGDBRemote::AsyncThread (void *arg) 2953 { 2954 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2955 2956 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2957 if (log) 2958 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2959 2960 Listener listener ("ProcessGDBRemote::AsyncThread"); 2961 EventSP event_sp; 2962 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2963 eBroadcastBitAsyncThreadShouldExit; 2964 2965 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2966 { 2967 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2968 2969 bool done = false; 2970 while (!done) 2971 { 2972 if (log) 2973 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2974 if (listener.WaitForEvent (NULL, event_sp)) 2975 { 2976 const uint32_t event_type = event_sp->GetType(); 2977 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2978 { 2979 if (log) 2980 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2981 2982 switch (event_type) 2983 { 2984 case eBroadcastBitAsyncContinue: 2985 { 2986 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2987 2988 if (continue_packet) 2989 { 2990 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2991 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2992 if (log) 2993 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2994 2995 if (::strstr (continue_cstr, "vAttach") == NULL) 2996 process->SetPrivateState(eStateRunning); 2997 StringExtractorGDBRemote response; 2998 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2999 3000 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 3001 // The thread ID list might be contained within the "response", or the stop reply packet that 3002 // caused the stop. So clear it now before we give the stop reply packet to the process 3003 // using the process->SetLastStopPacket()... 3004 process->ClearThreadIDList (); 3005 3006 switch (stop_state) 3007 { 3008 case eStateStopped: 3009 case eStateCrashed: 3010 case eStateSuspended: 3011 process->SetLastStopPacket (response); 3012 process->SetPrivateState (stop_state); 3013 break; 3014 3015 case eStateExited: 3016 { 3017 process->SetLastStopPacket (response); 3018 process->ClearThreadIDList(); 3019 response.SetFilePos(1); 3020 3021 int exit_status = response.GetHexU8(); 3022 const char *desc_cstr = NULL; 3023 StringExtractor extractor; 3024 std::string desc_string; 3025 if (response.GetBytesLeft() > 0 && response.GetChar('-') == ';') 3026 { 3027 std::string desc_token; 3028 while (response.GetNameColonValue (desc_token, desc_string)) 3029 { 3030 if (desc_token == "description") 3031 { 3032 extractor.GetStringRef().swap(desc_string); 3033 extractor.SetFilePos(0); 3034 extractor.GetHexByteString (desc_string); 3035 desc_cstr = desc_string.c_str(); 3036 } 3037 } 3038 } 3039 process->SetExitStatus(exit_status, desc_cstr); 3040 done = true; 3041 break; 3042 } 3043 case eStateInvalid: 3044 process->SetExitStatus(-1, "lost connection"); 3045 break; 3046 3047 default: 3048 process->SetPrivateState (stop_state); 3049 break; 3050 } 3051 } 3052 } 3053 break; 3054 3055 case eBroadcastBitAsyncThreadShouldExit: 3056 if (log) 3057 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 3058 done = true; 3059 break; 3060 3061 default: 3062 if (log) 3063 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 3064 done = true; 3065 break; 3066 } 3067 } 3068 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 3069 { 3070 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 3071 { 3072 process->SetExitStatus (-1, "lost connection"); 3073 done = true; 3074 } 3075 } 3076 } 3077 else 3078 { 3079 if (log) 3080 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 3081 done = true; 3082 } 3083 } 3084 } 3085 3086 if (log) 3087 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 3088 3089 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 3090 return NULL; 3091 } 3092 3093 //uint32_t 3094 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 3095 //{ 3096 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 3097 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 3098 // if (m_local_debugserver) 3099 // { 3100 // return Host::ListProcessesMatchingName (name, matches, pids); 3101 // } 3102 // else 3103 // { 3104 // // FIXME: Implement talking to the remote debugserver. 3105 // return 0; 3106 // } 3107 // 3108 //} 3109 // 3110 bool 3111 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 3112 lldb_private::StoppointCallbackContext *context, 3113 lldb::user_id_t break_id, 3114 lldb::user_id_t break_loc_id) 3115 { 3116 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 3117 // run so I can stop it if that's what I want to do. 3118 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3119 if (log) 3120 log->Printf("Hit New Thread Notification breakpoint."); 3121 return false; 3122 } 3123 3124 3125 bool 3126 ProcessGDBRemote::StartNoticingNewThreads() 3127 { 3128 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3129 if (m_thread_create_bp_sp) 3130 { 3131 if (log && log->GetVerbose()) 3132 log->Printf("Enabled noticing new thread breakpoint."); 3133 m_thread_create_bp_sp->SetEnabled(true); 3134 } 3135 else 3136 { 3137 PlatformSP platform_sp (m_target.GetPlatform()); 3138 if (platform_sp) 3139 { 3140 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3141 if (m_thread_create_bp_sp) 3142 { 3143 if (log && log->GetVerbose()) 3144 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3145 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3146 } 3147 else 3148 { 3149 if (log) 3150 log->Printf("Failed to create new thread notification breakpoint."); 3151 } 3152 } 3153 } 3154 return m_thread_create_bp_sp.get() != NULL; 3155 } 3156 3157 bool 3158 ProcessGDBRemote::StopNoticingNewThreads() 3159 { 3160 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3161 if (log && log->GetVerbose()) 3162 log->Printf ("Disabling new thread notification breakpoint."); 3163 3164 if (m_thread_create_bp_sp) 3165 m_thread_create_bp_sp->SetEnabled(false); 3166 3167 return true; 3168 } 3169 3170 lldb_private::DynamicLoader * 3171 ProcessGDBRemote::GetDynamicLoader () 3172 { 3173 if (m_dyld_ap.get() == NULL) 3174 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3175 return m_dyld_ap.get(); 3176 } 3177 3178 Error 3179 ProcessGDBRemote::SendEventData(const char *data) 3180 { 3181 int return_value; 3182 bool was_supported; 3183 3184 Error error; 3185 3186 return_value = m_gdb_comm.SendLaunchEventDataPacket (data, &was_supported); 3187 if (return_value != 0) 3188 { 3189 if (!was_supported) 3190 error.SetErrorString("Sending events is not supported for this process."); 3191 else 3192 error.SetErrorStringWithFormat("Error sending event data: %d.", return_value); 3193 } 3194 return error; 3195 } 3196 3197 const DataBufferSP 3198 ProcessGDBRemote::GetAuxvData() 3199 { 3200 DataBufferSP buf; 3201 if (m_gdb_comm.GetQXferAuxvReadSupported()) 3202 { 3203 std::string response_string; 3204 if (m_gdb_comm.SendPacketsAndConcatenateResponses("qXfer:auxv:read::", response_string) == GDBRemoteCommunication::PacketResult::Success) 3205 buf.reset(new DataBufferHeap(response_string.c_str(), response_string.length())); 3206 } 3207 return buf; 3208 } 3209 3210 StructuredData::ObjectSP 3211 ProcessGDBRemote::GetExtendedInfoForThread (lldb::tid_t tid) 3212 { 3213 StructuredData::ObjectSP object_sp; 3214 3215 if (m_gdb_comm.GetThreadExtendedInfoSupported()) 3216 { 3217 StructuredData::ObjectSP args_dict(new StructuredData::Dictionary()); 3218 SystemRuntime *runtime = GetSystemRuntime(); 3219 if (runtime) 3220 { 3221 runtime->AddThreadExtendedInfoPacketHints (args_dict); 3222 } 3223 args_dict->GetAsDictionary()->AddIntegerItem ("thread", tid); 3224 3225 StreamString packet; 3226 packet << "jThreadExtendedInfo:"; 3227 args_dict->Dump (packet); 3228 3229 // FIXME the final character of a JSON dictionary, '}', is the escape 3230 // character in gdb-remote binary mode. lldb currently doesn't escape 3231 // these characters in its packet output -- so we add the quoted version 3232 // of the } character here manually in case we talk to a debugserver which 3233 // un-escapes the characters at packet read time. 3234 packet << (char) (0x7d ^ 0x20); 3235 3236 StringExtractorGDBRemote response; 3237 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, false) == GDBRemoteCommunication::PacketResult::Success) 3238 { 3239 StringExtractorGDBRemote::ResponseType response_type = response.GetResponseType(); 3240 if (response_type == StringExtractorGDBRemote::eResponse) 3241 { 3242 if (!response.Empty()) 3243 { 3244 // The packet has already had the 0x7d xor quoting stripped out at the 3245 // GDBRemoteCommunication packet receive level. 3246 object_sp = StructuredData::ParseJSON (response.GetStringRef()); 3247 } 3248 } 3249 } 3250 } 3251 return object_sp; 3252 } 3253 3254 // Establish the largest memory read/write payloads we should use. 3255 // If the remote stub has a max packet size, stay under that size. 3256 // 3257 // If the remote stub's max packet size is crazy large, use a 3258 // reasonable largeish default. 3259 // 3260 // If the remote stub doesn't advertise a max packet size, use a 3261 // conservative default. 3262 3263 void 3264 ProcessGDBRemote::GetMaxMemorySize() 3265 { 3266 const uint64_t reasonable_largeish_default = 128 * 1024; 3267 const uint64_t conservative_default = 512; 3268 3269 if (m_max_memory_size == 0) 3270 { 3271 uint64_t stub_max_size = m_gdb_comm.GetRemoteMaxPacketSize(); 3272 if (stub_max_size != UINT64_MAX && stub_max_size != 0) 3273 { 3274 // Save the stub's claimed maximum packet size 3275 m_remote_stub_max_memory_size = stub_max_size; 3276 3277 // Even if the stub says it can support ginormous packets, 3278 // don't exceed our reasonable largeish default packet size. 3279 if (stub_max_size > reasonable_largeish_default) 3280 { 3281 stub_max_size = reasonable_largeish_default; 3282 } 3283 3284 m_max_memory_size = stub_max_size; 3285 } 3286 else 3287 { 3288 m_max_memory_size = conservative_default; 3289 } 3290 } 3291 } 3292 3293 void 3294 ProcessGDBRemote::SetUserSpecifiedMaxMemoryTransferSize (uint64_t user_specified_max) 3295 { 3296 if (user_specified_max != 0) 3297 { 3298 GetMaxMemorySize (); 3299 3300 if (m_remote_stub_max_memory_size != 0) 3301 { 3302 if (m_remote_stub_max_memory_size < user_specified_max) 3303 { 3304 m_max_memory_size = m_remote_stub_max_memory_size; // user specified a packet size too big, go as big 3305 // as the remote stub says we can go. 3306 } 3307 else 3308 { 3309 m_max_memory_size = user_specified_max; // user's packet size is good 3310 } 3311 } 3312 else 3313 { 3314 m_max_memory_size = user_specified_max; // user's packet size is probably fine 3315 } 3316 } 3317 } 3318 3319 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 3320 { 3321 private: 3322 3323 public: 3324 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3325 CommandObjectParsed (interpreter, 3326 "process plugin packet history", 3327 "Dumps the packet history buffer. ", 3328 NULL) 3329 { 3330 } 3331 3332 ~CommandObjectProcessGDBRemotePacketHistory () 3333 { 3334 } 3335 3336 bool 3337 DoExecute (Args& command, CommandReturnObject &result) 3338 { 3339 const size_t argc = command.GetArgumentCount(); 3340 if (argc == 0) 3341 { 3342 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3343 if (process) 3344 { 3345 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3346 result.SetStatus (eReturnStatusSuccessFinishResult); 3347 return true; 3348 } 3349 } 3350 else 3351 { 3352 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3353 } 3354 result.SetStatus (eReturnStatusFailed); 3355 return false; 3356 } 3357 }; 3358 3359 class CommandObjectProcessGDBRemotePacketXferSize : public CommandObjectParsed 3360 { 3361 private: 3362 3363 public: 3364 CommandObjectProcessGDBRemotePacketXferSize(CommandInterpreter &interpreter) : 3365 CommandObjectParsed (interpreter, 3366 "process plugin packet xfer-size", 3367 "Maximum size that lldb will try to read/write one one chunk.", 3368 NULL) 3369 { 3370 } 3371 3372 ~CommandObjectProcessGDBRemotePacketXferSize () 3373 { 3374 } 3375 3376 bool 3377 DoExecute (Args& command, CommandReturnObject &result) 3378 { 3379 const size_t argc = command.GetArgumentCount(); 3380 if (argc == 0) 3381 { 3382 result.AppendErrorWithFormat ("'%s' takes an argument to specify the max amount to be transferred when reading/writing", m_cmd_name.c_str()); 3383 result.SetStatus (eReturnStatusFailed); 3384 return false; 3385 } 3386 3387 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3388 if (process) 3389 { 3390 const char *packet_size = command.GetArgumentAtIndex(0); 3391 errno = 0; 3392 uint64_t user_specified_max = strtoul (packet_size, NULL, 10); 3393 if (errno == 0 && user_specified_max != 0) 3394 { 3395 process->SetUserSpecifiedMaxMemoryTransferSize (user_specified_max); 3396 result.SetStatus (eReturnStatusSuccessFinishResult); 3397 return true; 3398 } 3399 } 3400 result.SetStatus (eReturnStatusFailed); 3401 return false; 3402 } 3403 }; 3404 3405 3406 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3407 { 3408 private: 3409 3410 public: 3411 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3412 CommandObjectParsed (interpreter, 3413 "process plugin packet send", 3414 "Send a custom packet through the GDB remote protocol and print the answer. " 3415 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3416 NULL) 3417 { 3418 } 3419 3420 ~CommandObjectProcessGDBRemotePacketSend () 3421 { 3422 } 3423 3424 bool 3425 DoExecute (Args& command, CommandReturnObject &result) 3426 { 3427 const size_t argc = command.GetArgumentCount(); 3428 if (argc == 0) 3429 { 3430 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3431 result.SetStatus (eReturnStatusFailed); 3432 return false; 3433 } 3434 3435 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3436 if (process) 3437 { 3438 for (size_t i=0; i<argc; ++ i) 3439 { 3440 const char *packet_cstr = command.GetArgumentAtIndex(0); 3441 bool send_async = true; 3442 StringExtractorGDBRemote response; 3443 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3444 result.SetStatus (eReturnStatusSuccessFinishResult); 3445 Stream &output_strm = result.GetOutputStream(); 3446 output_strm.Printf (" packet: %s\n", packet_cstr); 3447 std::string &response_str = response.GetStringRef(); 3448 3449 if (strstr(packet_cstr, "qGetProfileData") != NULL) 3450 { 3451 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3452 } 3453 3454 if (response_str.empty()) 3455 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3456 else 3457 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3458 } 3459 } 3460 return true; 3461 } 3462 }; 3463 3464 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3465 { 3466 private: 3467 3468 public: 3469 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3470 CommandObjectRaw (interpreter, 3471 "process plugin packet monitor", 3472 "Send a qRcmd packet through the GDB remote protocol and print the response." 3473 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3474 NULL) 3475 { 3476 } 3477 3478 ~CommandObjectProcessGDBRemotePacketMonitor () 3479 { 3480 } 3481 3482 bool 3483 DoExecute (const char *command, CommandReturnObject &result) 3484 { 3485 if (command == NULL || command[0] == '\0') 3486 { 3487 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3488 result.SetStatus (eReturnStatusFailed); 3489 return false; 3490 } 3491 3492 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3493 if (process) 3494 { 3495 StreamString packet; 3496 packet.PutCString("qRcmd,"); 3497 packet.PutBytesAsRawHex8(command, strlen(command)); 3498 const char *packet_cstr = packet.GetString().c_str(); 3499 3500 bool send_async = true; 3501 StringExtractorGDBRemote response; 3502 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3503 result.SetStatus (eReturnStatusSuccessFinishResult); 3504 Stream &output_strm = result.GetOutputStream(); 3505 output_strm.Printf (" packet: %s\n", packet_cstr); 3506 const std::string &response_str = response.GetStringRef(); 3507 3508 if (response_str.empty()) 3509 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3510 else 3511 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3512 } 3513 return true; 3514 } 3515 }; 3516 3517 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3518 { 3519 private: 3520 3521 public: 3522 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3523 CommandObjectMultiword (interpreter, 3524 "process plugin packet", 3525 "Commands that deal with GDB remote packets.", 3526 NULL) 3527 { 3528 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3529 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3530 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3531 LoadSubCommand ("xfer-size", CommandObjectSP (new CommandObjectProcessGDBRemotePacketXferSize (interpreter))); 3532 } 3533 3534 ~CommandObjectProcessGDBRemotePacket () 3535 { 3536 } 3537 }; 3538 3539 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3540 { 3541 public: 3542 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3543 CommandObjectMultiword (interpreter, 3544 "process plugin", 3545 "A set of commands for operating on a ProcessGDBRemote process.", 3546 "process plugin <subcommand> [<subcommand-options>]") 3547 { 3548 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3549 } 3550 3551 ~CommandObjectMultiwordProcessGDBRemote () 3552 { 3553 } 3554 }; 3555 3556 CommandObject * 3557 ProcessGDBRemote::GetPluginCommandObject() 3558 { 3559 if (!m_command_sp) 3560 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3561 return m_command_sp.get(); 3562 } 3563