1 //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/lldb-python.h" 11 #include "lldb/Host/Config.h" 12 13 // C Includes 14 #include <errno.h> 15 #include <stdlib.h> 16 #ifndef LLDB_DISABLE_POSIX 17 #include <spawn.h> 18 #include <netinet/in.h> 19 #include <sys/mman.h> // for mmap 20 #endif 21 #include <sys/stat.h> 22 #include <sys/types.h> 23 #include <time.h> 24 25 // C++ Includes 26 #include <algorithm> 27 #include <map> 28 29 // Other libraries and framework includes 30 31 #include "lldb/Breakpoint/Watchpoint.h" 32 #include "lldb/Interpreter/Args.h" 33 #include "lldb/Core/ArchSpec.h" 34 #include "lldb/Core/Debugger.h" 35 #include "lldb/Core/ConnectionFileDescriptor.h" 36 #include "lldb/Host/FileSpec.h" 37 #include "lldb/Core/Module.h" 38 #include "lldb/Core/ModuleSpec.h" 39 #include "lldb/Core/PluginManager.h" 40 #include "lldb/Core/State.h" 41 #include "lldb/Core/StreamFile.h" 42 #include "lldb/Core/StreamString.h" 43 #include "lldb/Core/Timer.h" 44 #include "lldb/Core/Value.h" 45 #include "lldb/Host/Symbols.h" 46 #include "lldb/Host/TimeValue.h" 47 #include "lldb/Interpreter/CommandInterpreter.h" 48 #include "lldb/Interpreter/CommandObject.h" 49 #include "lldb/Interpreter/CommandObjectMultiword.h" 50 #include "lldb/Interpreter/CommandReturnObject.h" 51 #ifndef LLDB_DISABLE_PYTHON 52 #include "lldb/Interpreter/PythonDataObjects.h" 53 #endif 54 #include "lldb/Symbol/ObjectFile.h" 55 #include "lldb/Target/DynamicLoader.h" 56 #include "lldb/Target/Target.h" 57 #include "lldb/Target/TargetList.h" 58 #include "lldb/Target/ThreadPlanCallFunction.h" 59 #include "lldb/Utility/PseudoTerminal.h" 60 61 // Project includes 62 #include "lldb/Host/Host.h" 63 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 64 #include "Plugins/Process/Utility/StopInfoMachException.h" 65 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 66 #include "Utility/StringExtractorGDBRemote.h" 67 #include "GDBRemoteRegisterContext.h" 68 #include "ProcessGDBRemote.h" 69 #include "ProcessGDBRemoteLog.h" 70 #include "ThreadGDBRemote.h" 71 72 73 namespace lldb 74 { 75 // Provide a function that can easily dump the packet history if we know a 76 // ProcessGDBRemote * value (which we can get from logs or from debugging). 77 // We need the function in the lldb namespace so it makes it into the final 78 // executable since the LLDB shared library only exports stuff in the lldb 79 // namespace. This allows you to attach with a debugger and call this 80 // function and get the packet history dumped to a file. 81 void 82 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 83 { 84 lldb_private::StreamFile strm; 85 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 86 if (error.Success()) 87 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 88 } 89 } 90 91 #define DEBUGSERVER_BASENAME "debugserver" 92 using namespace lldb; 93 using namespace lldb_private; 94 95 96 namespace { 97 98 static PropertyDefinition 99 g_properties[] = 100 { 101 { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, 102 { "target-definition-file" , OptionValue::eTypeFileSpec , true, 0 , NULL, NULL, "The file that provides the description for remote target registers." }, 103 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 104 }; 105 106 enum 107 { 108 ePropertyPacketTimeout, 109 ePropertyTargetDefinitionFile 110 }; 111 112 class PluginProperties : public Properties 113 { 114 public: 115 116 static ConstString 117 GetSettingName () 118 { 119 return ProcessGDBRemote::GetPluginNameStatic(); 120 } 121 122 PluginProperties() : 123 Properties () 124 { 125 m_collection_sp.reset (new OptionValueProperties(GetSettingName())); 126 m_collection_sp->Initialize(g_properties); 127 } 128 129 virtual 130 ~PluginProperties() 131 { 132 } 133 134 uint64_t 135 GetPacketTimeout() 136 { 137 const uint32_t idx = ePropertyPacketTimeout; 138 return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); 139 } 140 141 bool 142 SetPacketTimeout(uint64_t timeout) 143 { 144 const uint32_t idx = ePropertyPacketTimeout; 145 return m_collection_sp->SetPropertyAtIndexAsUInt64(NULL, idx, timeout); 146 } 147 148 FileSpec 149 GetTargetDefinitionFile () const 150 { 151 const uint32_t idx = ePropertyTargetDefinitionFile; 152 return m_collection_sp->GetPropertyAtIndexAsFileSpec (NULL, idx); 153 } 154 }; 155 156 typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; 157 158 static const ProcessKDPPropertiesSP & 159 GetGlobalPluginProperties() 160 { 161 static ProcessKDPPropertiesSP g_settings_sp; 162 if (!g_settings_sp) 163 g_settings_sp.reset (new PluginProperties ()); 164 return g_settings_sp; 165 } 166 167 } // anonymous namespace end 168 169 // TODO Randomly assigning a port is unsafe. We should get an unused 170 // ephemeral port from the kernel and make sure we reserve it before passing 171 // it to debugserver. 172 173 #if defined (__APPLE__) 174 #define LOW_PORT (IPPORT_RESERVED) 175 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 176 #else 177 #define LOW_PORT (1024u) 178 #define HIGH_PORT (49151u) 179 #endif 180 181 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__)) 182 static bool rand_initialized = false; 183 184 static inline uint16_t 185 get_random_port () 186 { 187 if (!rand_initialized) 188 { 189 time_t seed = time(NULL); 190 191 rand_initialized = true; 192 srand(seed); 193 } 194 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 195 } 196 #endif 197 198 lldb_private::ConstString 199 ProcessGDBRemote::GetPluginNameStatic() 200 { 201 static ConstString g_name("gdb-remote"); 202 return g_name; 203 } 204 205 const char * 206 ProcessGDBRemote::GetPluginDescriptionStatic() 207 { 208 return "GDB Remote protocol based debugging plug-in."; 209 } 210 211 void 212 ProcessGDBRemote::Terminate() 213 { 214 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 215 } 216 217 218 lldb::ProcessSP 219 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 220 { 221 lldb::ProcessSP process_sp; 222 if (crash_file_path == NULL) 223 process_sp.reset (new ProcessGDBRemote (target, listener)); 224 return process_sp; 225 } 226 227 bool 228 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 229 { 230 if (plugin_specified_by_name) 231 return true; 232 233 // For now we are just making sure the file exists for a given module 234 Module *exe_module = target.GetExecutableModulePointer(); 235 if (exe_module) 236 { 237 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 238 // We can't debug core files... 239 switch (exe_objfile->GetType()) 240 { 241 case ObjectFile::eTypeInvalid: 242 case ObjectFile::eTypeCoreFile: 243 case ObjectFile::eTypeDebugInfo: 244 case ObjectFile::eTypeObjectFile: 245 case ObjectFile::eTypeSharedLibrary: 246 case ObjectFile::eTypeStubLibrary: 247 case ObjectFile::eTypeJIT: 248 return false; 249 case ObjectFile::eTypeExecutable: 250 case ObjectFile::eTypeDynamicLinker: 251 case ObjectFile::eTypeUnknown: 252 break; 253 } 254 return exe_module->GetFileSpec().Exists(); 255 } 256 // However, if there is no executable module, we return true since we might be preparing to attach. 257 return true; 258 } 259 260 //---------------------------------------------------------------------- 261 // ProcessGDBRemote constructor 262 //---------------------------------------------------------------------- 263 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 264 Process (target, listener), 265 m_flags (0), 266 m_gdb_comm(false), 267 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 268 m_last_stop_packet (), 269 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 270 m_register_info (), 271 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 272 m_async_thread (LLDB_INVALID_HOST_THREAD), 273 m_async_thread_state(eAsyncThreadNotStarted), 274 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 275 m_thread_ids (), 276 m_continue_c_tids (), 277 m_continue_C_tids (), 278 m_continue_s_tids (), 279 m_continue_S_tids (), 280 m_max_memory_size (0), 281 m_remote_stub_max_memory_size (0), 282 m_addr_to_mmap_size (), 283 m_thread_create_bp_sp (), 284 m_waiting_for_attach (false), 285 m_destroy_tried_resuming (false), 286 m_command_sp (), 287 m_breakpoint_pc_offset (0) 288 { 289 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 290 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 291 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 292 const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); 293 if (timeout_seconds > 0) 294 m_gdb_comm.SetPacketTimeout(timeout_seconds); 295 } 296 297 //---------------------------------------------------------------------- 298 // Destructor 299 //---------------------------------------------------------------------- 300 ProcessGDBRemote::~ProcessGDBRemote() 301 { 302 // m_mach_process.UnregisterNotificationCallbacks (this); 303 Clear(); 304 // We need to call finalize on the process before destroying ourselves 305 // to make sure all of the broadcaster cleanup goes as planned. If we 306 // destruct this class, then Process::~Process() might have problems 307 // trying to fully destroy the broadcaster. 308 Finalize(); 309 310 // The general Finalize is going to try to destroy the process and that SHOULD 311 // shut down the async thread. However, if we don't kill it it will get stranded and 312 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 313 StopAsyncThread(); 314 KillDebugserverProcess(); 315 } 316 317 //---------------------------------------------------------------------- 318 // PluginInterface 319 //---------------------------------------------------------------------- 320 ConstString 321 ProcessGDBRemote::GetPluginName() 322 { 323 return GetPluginNameStatic(); 324 } 325 326 uint32_t 327 ProcessGDBRemote::GetPluginVersion() 328 { 329 return 1; 330 } 331 332 bool 333 ProcessGDBRemote::ParsePythonTargetDefinition(const FileSpec &target_definition_fspec) 334 { 335 #ifndef LLDB_DISABLE_PYTHON 336 ScriptInterpreter *interpreter = GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 337 Error error; 338 lldb::ScriptInterpreterObjectSP module_object_sp (interpreter->LoadPluginModule(target_definition_fspec, error)); 339 if (module_object_sp) 340 { 341 lldb::ScriptInterpreterObjectSP target_definition_sp (interpreter->GetDynamicSettings(module_object_sp, 342 &GetTarget(), 343 "gdb-server-target-definition", 344 error)); 345 346 PythonDictionary target_dict(target_definition_sp); 347 348 if (target_dict) 349 { 350 PythonDictionary host_info_dict (target_dict.GetItemForKey("host-info")); 351 if (host_info_dict) 352 { 353 ArchSpec host_arch (host_info_dict.GetItemForKeyAsString(PythonString("triple"))); 354 355 if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) 356 { 357 GetTarget().SetArchitecture(host_arch); 358 } 359 360 } 361 m_breakpoint_pc_offset = target_dict.GetItemForKeyAsInteger("breakpoint-pc-offset", 0); 362 363 if (m_register_info.SetRegisterInfo (target_dict, GetTarget().GetArchitecture().GetByteOrder()) > 0) 364 { 365 return true; 366 } 367 } 368 } 369 #endif 370 return false; 371 } 372 373 374 void 375 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 376 { 377 if (!force && m_register_info.GetNumRegisters() > 0) 378 return; 379 380 char packet[128]; 381 m_register_info.Clear(); 382 uint32_t reg_offset = 0; 383 uint32_t reg_num = 0; 384 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 385 response_type == StringExtractorGDBRemote::eResponse; 386 ++reg_num) 387 { 388 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 389 assert (packet_len < (int)sizeof(packet)); 390 StringExtractorGDBRemote response; 391 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false) == GDBRemoteCommunication::PacketResult::Success) 392 { 393 response_type = response.GetResponseType(); 394 if (response_type == StringExtractorGDBRemote::eResponse) 395 { 396 std::string name; 397 std::string value; 398 ConstString reg_name; 399 ConstString alt_name; 400 ConstString set_name; 401 std::vector<uint32_t> value_regs; 402 std::vector<uint32_t> invalidate_regs; 403 RegisterInfo reg_info = { NULL, // Name 404 NULL, // Alt name 405 0, // byte size 406 reg_offset, // offset 407 eEncodingUint, // encoding 408 eFormatHex, // formate 409 { 410 LLDB_INVALID_REGNUM, // GCC reg num 411 LLDB_INVALID_REGNUM, // DWARF reg num 412 LLDB_INVALID_REGNUM, // generic reg num 413 reg_num, // GDB reg num 414 reg_num // native register number 415 }, 416 NULL, 417 NULL 418 }; 419 420 while (response.GetNameColonValue(name, value)) 421 { 422 if (name.compare("name") == 0) 423 { 424 reg_name.SetCString(value.c_str()); 425 } 426 else if (name.compare("alt-name") == 0) 427 { 428 alt_name.SetCString(value.c_str()); 429 } 430 else if (name.compare("bitsize") == 0) 431 { 432 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 433 } 434 else if (name.compare("offset") == 0) 435 { 436 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 437 if (reg_offset != offset) 438 { 439 reg_offset = offset; 440 } 441 } 442 else if (name.compare("encoding") == 0) 443 { 444 const Encoding encoding = Args::StringToEncoding (value.c_str()); 445 if (encoding != eEncodingInvalid) 446 reg_info.encoding = encoding; 447 } 448 else if (name.compare("format") == 0) 449 { 450 Format format = eFormatInvalid; 451 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 452 reg_info.format = format; 453 else if (value.compare("binary") == 0) 454 reg_info.format = eFormatBinary; 455 else if (value.compare("decimal") == 0) 456 reg_info.format = eFormatDecimal; 457 else if (value.compare("hex") == 0) 458 reg_info.format = eFormatHex; 459 else if (value.compare("float") == 0) 460 reg_info.format = eFormatFloat; 461 else if (value.compare("vector-sint8") == 0) 462 reg_info.format = eFormatVectorOfSInt8; 463 else if (value.compare("vector-uint8") == 0) 464 reg_info.format = eFormatVectorOfUInt8; 465 else if (value.compare("vector-sint16") == 0) 466 reg_info.format = eFormatVectorOfSInt16; 467 else if (value.compare("vector-uint16") == 0) 468 reg_info.format = eFormatVectorOfUInt16; 469 else if (value.compare("vector-sint32") == 0) 470 reg_info.format = eFormatVectorOfSInt32; 471 else if (value.compare("vector-uint32") == 0) 472 reg_info.format = eFormatVectorOfUInt32; 473 else if (value.compare("vector-float32") == 0) 474 reg_info.format = eFormatVectorOfFloat32; 475 else if (value.compare("vector-uint128") == 0) 476 reg_info.format = eFormatVectorOfUInt128; 477 } 478 else if (name.compare("set") == 0) 479 { 480 set_name.SetCString(value.c_str()); 481 } 482 else if (name.compare("gcc") == 0) 483 { 484 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 485 } 486 else if (name.compare("dwarf") == 0) 487 { 488 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 489 } 490 else if (name.compare("generic") == 0) 491 { 492 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 493 } 494 else if (name.compare("container-regs") == 0) 495 { 496 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 497 value_pair.second = value; 498 do 499 { 500 value_pair = value_pair.second.split(','); 501 if (!value_pair.first.empty()) 502 { 503 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 504 if (reg != LLDB_INVALID_REGNUM) 505 value_regs.push_back (reg); 506 } 507 } while (!value_pair.second.empty()); 508 } 509 else if (name.compare("invalidate-regs") == 0) 510 { 511 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 512 value_pair.second = value; 513 do 514 { 515 value_pair = value_pair.second.split(','); 516 if (!value_pair.first.empty()) 517 { 518 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 519 if (reg != LLDB_INVALID_REGNUM) 520 invalidate_regs.push_back (reg); 521 } 522 } while (!value_pair.second.empty()); 523 } 524 } 525 526 reg_info.byte_offset = reg_offset; 527 assert (reg_info.byte_size != 0); 528 reg_offset += reg_info.byte_size; 529 if (!value_regs.empty()) 530 { 531 value_regs.push_back(LLDB_INVALID_REGNUM); 532 reg_info.value_regs = value_regs.data(); 533 } 534 if (!invalidate_regs.empty()) 535 { 536 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 537 reg_info.invalidate_regs = invalidate_regs.data(); 538 } 539 540 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 541 } 542 else 543 { 544 break; // ensure exit before reg_num is incremented 545 } 546 } 547 else 548 { 549 break; 550 } 551 } 552 553 // Check if qHostInfo specified a specific packet timeout for this connection. 554 // If so then lets update our setting so the user knows what the timeout is 555 // and can see it. 556 const uint32_t host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout(); 557 if (host_packet_timeout) 558 { 559 GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout); 560 } 561 562 563 if (reg_num == 0) 564 { 565 FileSpec target_definition_fspec = GetGlobalPluginProperties()->GetTargetDefinitionFile (); 566 567 if (target_definition_fspec) 568 { 569 // See if we can get register definitions from a python file 570 if (ParsePythonTargetDefinition (target_definition_fspec)) 571 return; 572 } 573 } 574 575 // We didn't get anything if the accumulated reg_num is zero. See if we are 576 // debugging ARM and fill with a hard coded register set until we can get an 577 // updated debugserver down on the devices. 578 // On the other hand, if the accumulated reg_num is positive, see if we can 579 // add composite registers to the existing primordial ones. 580 bool from_scratch = (reg_num == 0); 581 582 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 583 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 584 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 585 586 // Use the process' architecture instead of the host arch, if available 587 ArchSpec remote_arch; 588 if (remote_process_arch.IsValid ()) 589 remote_arch = remote_process_arch; 590 else 591 remote_arch = remote_host_arch; 592 593 if (!target_arch.IsValid()) 594 { 595 if (remote_arch.IsValid() 596 && remote_arch.GetMachine() == llvm::Triple::arm 597 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 598 m_register_info.HardcodeARMRegisters(from_scratch); 599 } 600 else if (target_arch.GetMachine() == llvm::Triple::arm) 601 { 602 m_register_info.HardcodeARMRegisters(from_scratch); 603 } 604 605 // At this point, we can finalize our register info. 606 m_register_info.Finalize (); 607 } 608 609 Error 610 ProcessGDBRemote::WillLaunch (Module* module) 611 { 612 return WillLaunchOrAttach (); 613 } 614 615 Error 616 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 617 { 618 return WillLaunchOrAttach (); 619 } 620 621 Error 622 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 623 { 624 return WillLaunchOrAttach (); 625 } 626 627 Error 628 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 629 { 630 Error error (WillLaunchOrAttach ()); 631 632 if (error.Fail()) 633 return error; 634 635 error = ConnectToDebugserver (remote_url); 636 637 if (error.Fail()) 638 return error; 639 StartAsyncThread (); 640 641 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 642 if (pid == LLDB_INVALID_PROCESS_ID) 643 { 644 // We don't have a valid process ID, so note that we are connected 645 // and could now request to launch or attach, or get remote process 646 // listings... 647 SetPrivateState (eStateConnected); 648 } 649 else 650 { 651 // We have a valid process 652 SetID (pid); 653 GetThreadList(); 654 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) 655 { 656 if (!m_target.GetArchitecture().IsValid()) 657 { 658 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 659 { 660 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 661 } 662 else 663 { 664 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 665 } 666 } 667 668 const StateType state = SetThreadStopInfo (m_last_stop_packet); 669 if (state == eStateStopped) 670 { 671 SetPrivateState (state); 672 } 673 else 674 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 675 } 676 else 677 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 678 } 679 680 if (error.Success() 681 && !GetTarget().GetArchitecture().IsValid() 682 && m_gdb_comm.GetHostArchitecture().IsValid()) 683 { 684 // Prefer the *process'* architecture over that of the *host*, if available. 685 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 686 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 687 else 688 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 689 } 690 691 return error; 692 } 693 694 Error 695 ProcessGDBRemote::WillLaunchOrAttach () 696 { 697 Error error; 698 m_stdio_communication.Clear (); 699 return error; 700 } 701 702 //---------------------------------------------------------------------- 703 // Process Control 704 //---------------------------------------------------------------------- 705 Error 706 ProcessGDBRemote::DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) 707 { 708 Error error; 709 710 uint32_t launch_flags = launch_info.GetFlags().Get(); 711 const char *stdin_path = NULL; 712 const char *stdout_path = NULL; 713 const char *stderr_path = NULL; 714 const char *working_dir = launch_info.GetWorkingDirectory(); 715 716 const ProcessLaunchInfo::FileAction *file_action; 717 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 718 if (file_action) 719 { 720 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 721 stdin_path = file_action->GetPath(); 722 } 723 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 724 if (file_action) 725 { 726 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 727 stdout_path = file_action->GetPath(); 728 } 729 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 730 if (file_action) 731 { 732 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 733 stderr_path = file_action->GetPath(); 734 } 735 736 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 737 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 738 // ::LogSetLogFile ("/dev/stdout"); 739 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 740 741 ObjectFile * object_file = exe_module->GetObjectFile(); 742 if (object_file) 743 { 744 // Make sure we aren't already connected? 745 if (!m_gdb_comm.IsConnected()) 746 { 747 error = LaunchAndConnectToDebugserver (launch_info); 748 } 749 750 if (error.Success()) 751 { 752 lldb_utility::PseudoTerminal pty; 753 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 754 755 // If the debugserver is local and we aren't disabling STDIO, lets use 756 // a pseudo terminal to instead of relying on the 'O' packets for stdio 757 // since 'O' packets can really slow down debugging if the inferior 758 // does a lot of output. 759 PlatformSP platform_sp (m_target.GetPlatform()); 760 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 761 { 762 const char *slave_name = NULL; 763 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 764 { 765 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 766 slave_name = pty.GetSlaveName (NULL, 0); 767 } 768 if (stdin_path == NULL) 769 stdin_path = slave_name; 770 771 if (stdout_path == NULL) 772 stdout_path = slave_name; 773 774 if (stderr_path == NULL) 775 stderr_path = slave_name; 776 } 777 778 // Set STDIN to /dev/null if we want STDIO disabled or if either 779 // STDOUT or STDERR have been set to something and STDIN hasn't 780 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 781 stdin_path = "/dev/null"; 782 783 // Set STDOUT to /dev/null if we want STDIO disabled or if either 784 // STDIN or STDERR have been set to something and STDOUT hasn't 785 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 786 stdout_path = "/dev/null"; 787 788 // Set STDERR to /dev/null if we want STDIO disabled or if either 789 // STDIN or STDOUT have been set to something and STDERR hasn't 790 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 791 stderr_path = "/dev/null"; 792 793 if (stdin_path) 794 m_gdb_comm.SetSTDIN (stdin_path); 795 if (stdout_path) 796 m_gdb_comm.SetSTDOUT (stdout_path); 797 if (stderr_path) 798 m_gdb_comm.SetSTDERR (stderr_path); 799 800 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 801 802 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 803 804 const char * launch_event_data = launch_info.GetLaunchEventData(); 805 if (launch_event_data != NULL && *launch_event_data != '\0') 806 m_gdb_comm.SendLaunchEventDataPacket (launch_event_data); 807 808 if (working_dir && working_dir[0]) 809 { 810 m_gdb_comm.SetWorkingDir (working_dir); 811 } 812 813 // Send the environment and the program + arguments after we connect 814 const Args &environment = launch_info.GetEnvironmentEntries(); 815 if (environment.GetArgumentCount()) 816 { 817 size_t num_environment_entries = environment.GetArgumentCount(); 818 for (size_t i=0; i<num_environment_entries; ++i) 819 { 820 const char *env_entry = environment.GetArgumentAtIndex(i); 821 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 822 break; 823 } 824 } 825 826 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 827 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info); 828 if (arg_packet_err == 0) 829 { 830 std::string error_str; 831 if (m_gdb_comm.GetLaunchSuccess (error_str)) 832 { 833 SetID (m_gdb_comm.GetCurrentProcessID ()); 834 } 835 else 836 { 837 error.SetErrorString (error_str.c_str()); 838 } 839 } 840 else 841 { 842 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 843 } 844 845 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 846 847 if (GetID() == LLDB_INVALID_PROCESS_ID) 848 { 849 if (log) 850 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 851 KillDebugserverProcess (); 852 return error; 853 } 854 855 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false) == GDBRemoteCommunication::PacketResult::Success) 856 { 857 if (!m_target.GetArchitecture().IsValid()) 858 { 859 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 860 { 861 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 862 } 863 else 864 { 865 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 866 } 867 } 868 869 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 870 871 if (!disable_stdio) 872 { 873 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 874 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 875 } 876 } 877 } 878 else 879 { 880 if (log) 881 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 882 } 883 } 884 else 885 { 886 // Set our user ID to an invalid process ID. 887 SetID(LLDB_INVALID_PROCESS_ID); 888 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 889 exe_module->GetFileSpec().GetFilename().AsCString(), 890 exe_module->GetArchitecture().GetArchitectureName()); 891 } 892 return error; 893 894 } 895 896 897 Error 898 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 899 { 900 Error error; 901 // Only connect if we have a valid connect URL 902 903 if (connect_url && connect_url[0]) 904 { 905 std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 906 if (conn_ap.get()) 907 { 908 const uint32_t max_retry_count = 50; 909 uint32_t retry_count = 0; 910 while (!m_gdb_comm.IsConnected()) 911 { 912 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 913 { 914 m_gdb_comm.SetConnection (conn_ap.release()); 915 break; 916 } 917 else if (error.WasInterrupted()) 918 { 919 // If we were interrupted, don't keep retrying. 920 break; 921 } 922 923 retry_count++; 924 925 if (retry_count >= max_retry_count) 926 break; 927 928 usleep (100000); 929 } 930 } 931 } 932 933 if (!m_gdb_comm.IsConnected()) 934 { 935 if (error.Success()) 936 error.SetErrorString("not connected to remote gdb server"); 937 return error; 938 } 939 940 // We always seem to be able to open a connection to a local port 941 // so we need to make sure we can then send data to it. If we can't 942 // then we aren't actually connected to anything, so try and do the 943 // handshake with the remote GDB server and make sure that goes 944 // alright. 945 if (!m_gdb_comm.HandshakeWithServer (&error)) 946 { 947 m_gdb_comm.Disconnect(); 948 if (error.Success()) 949 error.SetErrorString("not connected to remote gdb server"); 950 return error; 951 } 952 m_gdb_comm.GetThreadSuffixSupported (); 953 m_gdb_comm.GetListThreadsInStopReplySupported (); 954 m_gdb_comm.GetHostInfo (); 955 m_gdb_comm.GetVContSupported ('c'); 956 m_gdb_comm.GetVAttachOrWaitSupported(); 957 958 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 959 for (size_t idx = 0; idx < num_cmds; idx++) 960 { 961 StringExtractorGDBRemote response; 962 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 963 } 964 return error; 965 } 966 967 void 968 ProcessGDBRemote::DidLaunchOrAttach () 969 { 970 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 971 if (log) 972 log->Printf ("ProcessGDBRemote::DidLaunch()"); 973 if (GetID() != LLDB_INVALID_PROCESS_ID) 974 { 975 BuildDynamicRegisterInfo (false); 976 977 // See if the GDB server supports the qHostInfo information 978 979 ArchSpec gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 980 981 // See if the GDB server supports the qProcessInfo packet, if so 982 // prefer that over the Host information as it will be more specific 983 // to our process. 984 985 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 986 gdb_remote_arch = m_gdb_comm.GetProcessArchitecture(); 987 988 if (gdb_remote_arch.IsValid()) 989 { 990 ArchSpec &target_arch = GetTarget().GetArchitecture(); 991 992 if (target_arch.IsValid()) 993 { 994 // If the remote host is ARM and we have apple as the vendor, then 995 // ARM executables and shared libraries can have mixed ARM architectures. 996 // You can have an armv6 executable, and if the host is armv7, then the 997 // system will load the best possible architecture for all shared libraries 998 // it has, so we really need to take the remote host architecture as our 999 // defacto architecture in this case. 1000 1001 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 1002 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 1003 { 1004 target_arch = gdb_remote_arch; 1005 } 1006 else 1007 { 1008 // Fill in what is missing in the triple 1009 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 1010 llvm::Triple &target_triple = target_arch.GetTriple(); 1011 if (target_triple.getVendorName().size() == 0) 1012 { 1013 target_triple.setVendor (remote_triple.getVendor()); 1014 1015 if (target_triple.getOSName().size() == 0) 1016 { 1017 target_triple.setOS (remote_triple.getOS()); 1018 1019 if (target_triple.getEnvironmentName().size() == 0) 1020 target_triple.setEnvironment (remote_triple.getEnvironment()); 1021 } 1022 } 1023 } 1024 } 1025 else 1026 { 1027 // The target doesn't have a valid architecture yet, set it from 1028 // the architecture we got from the remote GDB server 1029 target_arch = gdb_remote_arch; 1030 } 1031 } 1032 } 1033 } 1034 1035 void 1036 ProcessGDBRemote::DidLaunch () 1037 { 1038 DidLaunchOrAttach (); 1039 } 1040 1041 Error 1042 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 1043 { 1044 ProcessAttachInfo attach_info; 1045 return DoAttachToProcessWithID(attach_pid, attach_info); 1046 } 1047 1048 Error 1049 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 1050 { 1051 Error error; 1052 // Clear out and clean up from any current state 1053 Clear(); 1054 if (attach_pid != LLDB_INVALID_PROCESS_ID) 1055 { 1056 // Make sure we aren't already connected? 1057 if (!m_gdb_comm.IsConnected()) 1058 { 1059 error = LaunchAndConnectToDebugserver (attach_info); 1060 1061 if (error.Fail()) 1062 { 1063 const char *error_string = error.AsCString(); 1064 if (error_string == NULL) 1065 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1066 1067 SetExitStatus (-1, error_string); 1068 } 1069 } 1070 1071 if (error.Success()) 1072 { 1073 char packet[64]; 1074 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 1075 SetID (attach_pid); 1076 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 1077 } 1078 } 1079 return error; 1080 } 1081 1082 Error 1083 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, const ProcessAttachInfo &attach_info) 1084 { 1085 Error error; 1086 // Clear out and clean up from any current state 1087 Clear(); 1088 1089 if (process_name && process_name[0]) 1090 { 1091 // Make sure we aren't already connected? 1092 if (!m_gdb_comm.IsConnected()) 1093 { 1094 error = LaunchAndConnectToDebugserver (attach_info); 1095 1096 if (error.Fail()) 1097 { 1098 const char *error_string = error.AsCString(); 1099 if (error_string == NULL) 1100 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1101 1102 SetExitStatus (-1, error_string); 1103 } 1104 } 1105 1106 if (error.Success()) 1107 { 1108 StreamString packet; 1109 1110 if (attach_info.GetWaitForLaunch()) 1111 { 1112 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1113 { 1114 packet.PutCString ("vAttachWait"); 1115 } 1116 else 1117 { 1118 if (attach_info.GetIgnoreExisting()) 1119 packet.PutCString("vAttachWait"); 1120 else 1121 packet.PutCString ("vAttachOrWait"); 1122 } 1123 } 1124 else 1125 packet.PutCString("vAttachName"); 1126 packet.PutChar(';'); 1127 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1128 1129 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1130 1131 } 1132 } 1133 return error; 1134 } 1135 1136 1137 bool 1138 ProcessGDBRemote::SetExitStatus (int exit_status, const char *cstr) 1139 { 1140 m_gdb_comm.Disconnect(); 1141 return Process::SetExitStatus (exit_status, cstr); 1142 } 1143 1144 void 1145 ProcessGDBRemote::DidAttach () 1146 { 1147 DidLaunchOrAttach (); 1148 } 1149 1150 1151 Error 1152 ProcessGDBRemote::WillResume () 1153 { 1154 m_continue_c_tids.clear(); 1155 m_continue_C_tids.clear(); 1156 m_continue_s_tids.clear(); 1157 m_continue_S_tids.clear(); 1158 return Error(); 1159 } 1160 1161 Error 1162 ProcessGDBRemote::DoResume () 1163 { 1164 Error error; 1165 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1166 if (log) 1167 log->Printf ("ProcessGDBRemote::Resume()"); 1168 1169 Listener listener ("gdb-remote.resume-packet-sent"); 1170 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1171 { 1172 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1173 1174 const size_t num_threads = GetThreadList().GetSize(); 1175 1176 StreamString continue_packet; 1177 bool continue_packet_error = false; 1178 if (m_gdb_comm.HasAnyVContSupport ()) 1179 { 1180 if (m_continue_c_tids.size() == num_threads || 1181 (m_continue_c_tids.empty() && 1182 m_continue_C_tids.empty() && 1183 m_continue_s_tids.empty() && 1184 m_continue_S_tids.empty())) 1185 { 1186 // All threads are continuing, just send a "c" packet 1187 continue_packet.PutCString ("c"); 1188 } 1189 else 1190 { 1191 continue_packet.PutCString ("vCont"); 1192 1193 if (!m_continue_c_tids.empty()) 1194 { 1195 if (m_gdb_comm.GetVContSupported ('c')) 1196 { 1197 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) 1198 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1199 } 1200 else 1201 continue_packet_error = true; 1202 } 1203 1204 if (!continue_packet_error && !m_continue_C_tids.empty()) 1205 { 1206 if (m_gdb_comm.GetVContSupported ('C')) 1207 { 1208 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) 1209 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1210 } 1211 else 1212 continue_packet_error = true; 1213 } 1214 1215 if (!continue_packet_error && !m_continue_s_tids.empty()) 1216 { 1217 if (m_gdb_comm.GetVContSupported ('s')) 1218 { 1219 for (tid_collection::const_iterator t_pos = m_continue_s_tids.begin(), t_end = m_continue_s_tids.end(); t_pos != t_end; ++t_pos) 1220 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1221 } 1222 else 1223 continue_packet_error = true; 1224 } 1225 1226 if (!continue_packet_error && !m_continue_S_tids.empty()) 1227 { 1228 if (m_gdb_comm.GetVContSupported ('S')) 1229 { 1230 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) 1231 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1232 } 1233 else 1234 continue_packet_error = true; 1235 } 1236 1237 if (continue_packet_error) 1238 continue_packet.GetString().clear(); 1239 } 1240 } 1241 else 1242 continue_packet_error = true; 1243 1244 if (continue_packet_error) 1245 { 1246 // Either no vCont support, or we tried to use part of the vCont 1247 // packet that wasn't supported by the remote GDB server. 1248 // We need to try and make a simple packet that can do our continue 1249 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1250 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1251 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1252 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1253 if (num_continue_c_tids > 0) 1254 { 1255 if (num_continue_c_tids == num_threads) 1256 { 1257 // All threads are resuming... 1258 m_gdb_comm.SetCurrentThreadForRun (-1); 1259 continue_packet.PutChar ('c'); 1260 continue_packet_error = false; 1261 } 1262 else if (num_continue_c_tids == 1 && 1263 num_continue_C_tids == 0 && 1264 num_continue_s_tids == 0 && 1265 num_continue_S_tids == 0 ) 1266 { 1267 // Only one thread is continuing 1268 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1269 continue_packet.PutChar ('c'); 1270 continue_packet_error = false; 1271 } 1272 } 1273 1274 if (continue_packet_error && num_continue_C_tids > 0) 1275 { 1276 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1277 num_continue_C_tids > 0 && 1278 num_continue_s_tids == 0 && 1279 num_continue_S_tids == 0 ) 1280 { 1281 const int continue_signo = m_continue_C_tids.front().second; 1282 // Only one thread is continuing 1283 if (num_continue_C_tids > 1) 1284 { 1285 // More that one thread with a signal, yet we don't have 1286 // vCont support and we are being asked to resume each 1287 // thread with a signal, we need to make sure they are 1288 // all the same signal, or we can't issue the continue 1289 // accurately with the current support... 1290 if (num_continue_C_tids > 1) 1291 { 1292 continue_packet_error = false; 1293 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1294 { 1295 if (m_continue_C_tids[i].second != continue_signo) 1296 continue_packet_error = true; 1297 } 1298 } 1299 if (!continue_packet_error) 1300 m_gdb_comm.SetCurrentThreadForRun (-1); 1301 } 1302 else 1303 { 1304 // Set the continue thread ID 1305 continue_packet_error = false; 1306 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1307 } 1308 if (!continue_packet_error) 1309 { 1310 // Add threads continuing with the same signo... 1311 continue_packet.Printf("C%2.2x", continue_signo); 1312 } 1313 } 1314 } 1315 1316 if (continue_packet_error && num_continue_s_tids > 0) 1317 { 1318 if (num_continue_s_tids == num_threads) 1319 { 1320 // All threads are resuming... 1321 m_gdb_comm.SetCurrentThreadForRun (-1); 1322 continue_packet.PutChar ('s'); 1323 continue_packet_error = false; 1324 } 1325 else if (num_continue_c_tids == 0 && 1326 num_continue_C_tids == 0 && 1327 num_continue_s_tids == 1 && 1328 num_continue_S_tids == 0 ) 1329 { 1330 // Only one thread is stepping 1331 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1332 continue_packet.PutChar ('s'); 1333 continue_packet_error = false; 1334 } 1335 } 1336 1337 if (!continue_packet_error && num_continue_S_tids > 0) 1338 { 1339 if (num_continue_S_tids == num_threads) 1340 { 1341 const int step_signo = m_continue_S_tids.front().second; 1342 // Are all threads trying to step with the same signal? 1343 continue_packet_error = false; 1344 if (num_continue_S_tids > 1) 1345 { 1346 for (size_t i=1; i<num_threads; ++i) 1347 { 1348 if (m_continue_S_tids[i].second != step_signo) 1349 continue_packet_error = true; 1350 } 1351 } 1352 if (!continue_packet_error) 1353 { 1354 // Add threads stepping with the same signo... 1355 m_gdb_comm.SetCurrentThreadForRun (-1); 1356 continue_packet.Printf("S%2.2x", step_signo); 1357 } 1358 } 1359 else if (num_continue_c_tids == 0 && 1360 num_continue_C_tids == 0 && 1361 num_continue_s_tids == 0 && 1362 num_continue_S_tids == 1 ) 1363 { 1364 // Only one thread is stepping with signal 1365 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1366 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1367 continue_packet_error = false; 1368 } 1369 } 1370 } 1371 1372 if (continue_packet_error) 1373 { 1374 error.SetErrorString ("can't make continue packet for this resume"); 1375 } 1376 else 1377 { 1378 EventSP event_sp; 1379 TimeValue timeout; 1380 timeout = TimeValue::Now(); 1381 timeout.OffsetWithSeconds (5); 1382 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1383 { 1384 error.SetErrorString ("Trying to resume but the async thread is dead."); 1385 if (log) 1386 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1387 return error; 1388 } 1389 1390 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1391 1392 if (listener.WaitForEvent (&timeout, event_sp) == false) 1393 { 1394 error.SetErrorString("Resume timed out."); 1395 if (log) 1396 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1397 } 1398 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1399 { 1400 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1401 if (log) 1402 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1403 return error; 1404 } 1405 } 1406 } 1407 1408 return error; 1409 } 1410 1411 void 1412 ProcessGDBRemote::ClearThreadIDList () 1413 { 1414 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1415 m_thread_ids.clear(); 1416 } 1417 1418 bool 1419 ProcessGDBRemote::UpdateThreadIDList () 1420 { 1421 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1422 bool sequence_mutex_unavailable = false; 1423 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1424 if (sequence_mutex_unavailable) 1425 { 1426 return false; // We just didn't get the list 1427 } 1428 return true; 1429 } 1430 1431 bool 1432 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1433 { 1434 // locker will keep a mutex locked until it goes out of scope 1435 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1436 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1437 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1438 1439 size_t num_thread_ids = m_thread_ids.size(); 1440 // The "m_thread_ids" thread ID list should always be updated after each stop 1441 // reply packet, but in case it isn't, update it here. 1442 if (num_thread_ids == 0) 1443 { 1444 if (!UpdateThreadIDList ()) 1445 return false; 1446 num_thread_ids = m_thread_ids.size(); 1447 } 1448 1449 ThreadList old_thread_list_copy(old_thread_list); 1450 if (num_thread_ids > 0) 1451 { 1452 for (size_t i=0; i<num_thread_ids; ++i) 1453 { 1454 tid_t tid = m_thread_ids[i]; 1455 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1456 if (!thread_sp) 1457 { 1458 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1459 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1460 log->Printf( 1461 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1462 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1463 thread_sp->GetID()); 1464 } 1465 else 1466 { 1467 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1468 log->Printf( 1469 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1470 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1471 thread_sp->GetID()); 1472 } 1473 new_thread_list.AddThread(thread_sp); 1474 } 1475 } 1476 1477 // Whatever that is left in old_thread_list_copy are not 1478 // present in new_thread_list. Remove non-existent threads from internal id table. 1479 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1480 for (size_t i=0; i<old_num_thread_ids; i++) 1481 { 1482 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1483 if (old_thread_sp) 1484 { 1485 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1486 m_thread_id_to_index_id_map.erase(old_thread_id); 1487 } 1488 } 1489 1490 return true; 1491 } 1492 1493 1494 StateType 1495 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1496 { 1497 stop_packet.SetFilePos (0); 1498 const char stop_type = stop_packet.GetChar(); 1499 switch (stop_type) 1500 { 1501 case 'T': 1502 case 'S': 1503 { 1504 // This is a bit of a hack, but is is required. If we did exec, we 1505 // need to clear our thread lists and also know to rebuild our dynamic 1506 // register info before we lookup and threads and populate the expedited 1507 // register values so we need to know this right away so we can cleanup 1508 // and update our registers. 1509 const uint32_t stop_id = GetStopID(); 1510 if (stop_id == 0) 1511 { 1512 // Our first stop, make sure we have a process ID, and also make 1513 // sure we know about our registers 1514 if (GetID() == LLDB_INVALID_PROCESS_ID) 1515 { 1516 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1517 if (pid != LLDB_INVALID_PROCESS_ID) 1518 SetID (pid); 1519 } 1520 BuildDynamicRegisterInfo (true); 1521 } 1522 // Stop with signal and thread info 1523 const uint8_t signo = stop_packet.GetHexU8(); 1524 std::string name; 1525 std::string value; 1526 std::string thread_name; 1527 std::string reason; 1528 std::string description; 1529 uint32_t exc_type = 0; 1530 std::vector<addr_t> exc_data; 1531 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1532 ThreadSP thread_sp; 1533 ThreadGDBRemote *gdb_thread = NULL; 1534 1535 while (stop_packet.GetNameColonValue(name, value)) 1536 { 1537 if (name.compare("metype") == 0) 1538 { 1539 // exception type in big endian hex 1540 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1541 } 1542 else if (name.compare("medata") == 0) 1543 { 1544 // exception data in big endian hex 1545 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1546 } 1547 else if (name.compare("thread") == 0) 1548 { 1549 // thread in big endian hex 1550 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1551 // m_thread_list_real does have its own mutex, but we need to 1552 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1553 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1554 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1555 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1556 1557 if (!thread_sp) 1558 { 1559 // Create the thread if we need to 1560 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1561 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1562 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1563 log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1564 __FUNCTION__, 1565 static_cast<void*>(thread_sp.get()), 1566 thread_sp->GetID()); 1567 1568 m_thread_list_real.AddThread(thread_sp); 1569 } 1570 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1571 1572 } 1573 else if (name.compare("threads") == 0) 1574 { 1575 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1576 m_thread_ids.clear(); 1577 // A comma separated list of all threads in the current 1578 // process that includes the thread for this stop reply 1579 // packet 1580 size_t comma_pos; 1581 lldb::tid_t tid; 1582 while ((comma_pos = value.find(',')) != std::string::npos) 1583 { 1584 value[comma_pos] = '\0'; 1585 // thread in big endian hex 1586 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1587 if (tid != LLDB_INVALID_THREAD_ID) 1588 m_thread_ids.push_back (tid); 1589 value.erase(0, comma_pos + 1); 1590 } 1591 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1592 if (tid != LLDB_INVALID_THREAD_ID) 1593 m_thread_ids.push_back (tid); 1594 } 1595 else if (name.compare("hexname") == 0) 1596 { 1597 StringExtractor name_extractor; 1598 // Swap "value" over into "name_extractor" 1599 name_extractor.GetStringRef().swap(value); 1600 // Now convert the HEX bytes into a string value 1601 name_extractor.GetHexByteString (value); 1602 thread_name.swap (value); 1603 } 1604 else if (name.compare("name") == 0) 1605 { 1606 thread_name.swap (value); 1607 } 1608 else if (name.compare("qaddr") == 0) 1609 { 1610 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1611 } 1612 else if (name.compare("reason") == 0) 1613 { 1614 reason.swap(value); 1615 } 1616 else if (name.compare("description") == 0) 1617 { 1618 StringExtractor desc_extractor; 1619 // Swap "value" over into "name_extractor" 1620 desc_extractor.GetStringRef().swap(value); 1621 // Now convert the HEX bytes into a string value 1622 desc_extractor.GetHexByteString (thread_name); 1623 } 1624 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1625 { 1626 // We have a register number that contains an expedited 1627 // register value. Lets supply this register to our thread 1628 // so it won't have to go and read it. 1629 if (gdb_thread) 1630 { 1631 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1632 1633 if (reg != UINT32_MAX) 1634 { 1635 StringExtractor reg_value_extractor; 1636 // Swap "value" over into "reg_value_extractor" 1637 reg_value_extractor.GetStringRef().swap(value); 1638 if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) 1639 { 1640 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1641 name.c_str(), 1642 reg, 1643 reg, 1644 reg_value_extractor.GetStringRef().c_str(), 1645 stop_packet.GetStringRef().c_str()); 1646 } 1647 } 1648 } 1649 } 1650 } 1651 1652 // If the response is old style 'S' packet which does not provide us with thread information 1653 // then update the thread list and choose the first one. 1654 if (!thread_sp) 1655 { 1656 UpdateThreadIDList (); 1657 1658 if (!m_thread_ids.empty ()) 1659 { 1660 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1661 thread_sp = m_thread_list_real.FindThreadByProtocolID (m_thread_ids.front (), false); 1662 if (thread_sp) 1663 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get ()); 1664 } 1665 } 1666 1667 if (thread_sp) 1668 { 1669 // Clear the stop info just in case we don't set it to anything 1670 thread_sp->SetStopInfo (StopInfoSP()); 1671 1672 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1673 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1674 if (exc_type != 0) 1675 { 1676 const size_t exc_data_size = exc_data.size(); 1677 1678 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1679 exc_type, 1680 exc_data_size, 1681 exc_data_size >= 1 ? exc_data[0] : 0, 1682 exc_data_size >= 2 ? exc_data[1] : 0, 1683 exc_data_size >= 3 ? exc_data[2] : 0)); 1684 } 1685 else 1686 { 1687 bool handled = false; 1688 bool did_exec = false; 1689 if (!reason.empty()) 1690 { 1691 if (reason.compare("trace") == 0) 1692 { 1693 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1694 handled = true; 1695 } 1696 else if (reason.compare("breakpoint") == 0) 1697 { 1698 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1699 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1700 if (bp_site_sp) 1701 { 1702 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1703 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1704 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1705 handled = true; 1706 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1707 { 1708 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1709 } 1710 else 1711 { 1712 StopInfoSP invalid_stop_info_sp; 1713 thread_sp->SetStopInfo (invalid_stop_info_sp); 1714 } 1715 } 1716 } 1717 else if (reason.compare("trap") == 0) 1718 { 1719 // Let the trap just use the standard signal stop reason below... 1720 } 1721 else if (reason.compare("watchpoint") == 0) 1722 { 1723 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1724 // TODO: locate the watchpoint somehow... 1725 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1726 handled = true; 1727 } 1728 else if (reason.compare("exception") == 0) 1729 { 1730 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1731 handled = true; 1732 } 1733 else if (reason.compare("exec") == 0) 1734 { 1735 did_exec = true; 1736 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 1737 handled = true; 1738 } 1739 } 1740 1741 if (!handled && signo && did_exec == false) 1742 { 1743 if (signo == SIGTRAP) 1744 { 1745 // Currently we are going to assume SIGTRAP means we are either 1746 // hitting a breakpoint or hardware single stepping. 1747 handled = true; 1748 addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; 1749 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1750 1751 if (bp_site_sp) 1752 { 1753 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1754 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1755 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1756 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1757 { 1758 if(m_breakpoint_pc_offset != 0) 1759 thread_sp->GetRegisterContext()->SetPC(pc); 1760 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1761 } 1762 else 1763 { 1764 StopInfoSP invalid_stop_info_sp; 1765 thread_sp->SetStopInfo (invalid_stop_info_sp); 1766 } 1767 } 1768 else 1769 { 1770 // If we were stepping then assume the stop was the result of the trace. If we were 1771 // not stepping then report the SIGTRAP. 1772 // FIXME: We are still missing the case where we single step over a trap instruction. 1773 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 1774 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1775 else 1776 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1777 } 1778 } 1779 if (!handled) 1780 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1781 } 1782 1783 if (!description.empty()) 1784 { 1785 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 1786 if (stop_info_sp) 1787 { 1788 stop_info_sp->SetDescription (description.c_str()); 1789 } 1790 else 1791 { 1792 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1793 } 1794 } 1795 } 1796 } 1797 return eStateStopped; 1798 } 1799 break; 1800 1801 case 'W': 1802 case 'X': 1803 // process exited 1804 return eStateExited; 1805 1806 default: 1807 break; 1808 } 1809 return eStateInvalid; 1810 } 1811 1812 void 1813 ProcessGDBRemote::RefreshStateAfterStop () 1814 { 1815 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1816 m_thread_ids.clear(); 1817 // Set the thread stop info. It might have a "threads" key whose value is 1818 // a list of all thread IDs in the current process, so m_thread_ids might 1819 // get set. 1820 SetThreadStopInfo (m_last_stop_packet); 1821 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1822 if (m_thread_ids.empty()) 1823 { 1824 // No, we need to fetch the thread list manually 1825 UpdateThreadIDList(); 1826 } 1827 1828 // Let all threads recover from stopping and do any clean up based 1829 // on the previous thread state (if any). 1830 m_thread_list_real.RefreshStateAfterStop(); 1831 1832 } 1833 1834 Error 1835 ProcessGDBRemote::DoHalt (bool &caused_stop) 1836 { 1837 Error error; 1838 1839 bool timed_out = false; 1840 Mutex::Locker locker; 1841 1842 if (m_public_state.GetValue() == eStateAttaching) 1843 { 1844 // We are being asked to halt during an attach. We need to just close 1845 // our file handle and debugserver will go away, and we can be done... 1846 m_gdb_comm.Disconnect(); 1847 } 1848 else 1849 { 1850 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1851 { 1852 if (timed_out) 1853 error.SetErrorString("timed out sending interrupt packet"); 1854 else 1855 error.SetErrorString("unknown error sending interrupt packet"); 1856 } 1857 1858 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1859 } 1860 return error; 1861 } 1862 1863 Error 1864 ProcessGDBRemote::DoDetach(bool keep_stopped) 1865 { 1866 Error error; 1867 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1868 if (log) 1869 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 1870 1871 error = m_gdb_comm.Detach (keep_stopped); 1872 if (log) 1873 { 1874 if (error.Success()) 1875 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1876 else 1877 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 1878 } 1879 1880 if (!error.Success()) 1881 return error; 1882 1883 // Sleep for one second to let the process get all detached... 1884 StopAsyncThread (); 1885 1886 SetPrivateState (eStateDetached); 1887 ResumePrivateStateThread(); 1888 1889 //KillDebugserverProcess (); 1890 return error; 1891 } 1892 1893 1894 Error 1895 ProcessGDBRemote::DoDestroy () 1896 { 1897 Error error; 1898 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1899 if (log) 1900 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1901 1902 // There is a bug in older iOS debugservers where they don't shut down the process 1903 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1904 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1905 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1906 // destroy it again. 1907 // 1908 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1909 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1910 // the debugservers with this bug are equal. There really should be a better way to test this! 1911 // 1912 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1913 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1914 // just do the straight-forward kill. 1915 // 1916 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1917 // necessary (or helpful) to do any of this. 1918 1919 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1920 { 1921 PlatformSP platform_sp = GetTarget().GetPlatform(); 1922 1923 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1924 if (platform_sp 1925 && platform_sp->GetName() 1926 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 1927 { 1928 if (m_destroy_tried_resuming) 1929 { 1930 if (log) 1931 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1932 } 1933 else 1934 { 1935 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1936 // but we really need it to happen here and it doesn't matter if we do it twice. 1937 m_thread_list.DiscardThreadPlans(); 1938 DisableAllBreakpointSites(); 1939 1940 bool stop_looks_like_crash = false; 1941 ThreadList &threads = GetThreadList(); 1942 1943 { 1944 Mutex::Locker locker(threads.GetMutex()); 1945 1946 size_t num_threads = threads.GetSize(); 1947 for (size_t i = 0; i < num_threads; i++) 1948 { 1949 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1950 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1951 StopReason reason = eStopReasonInvalid; 1952 if (stop_info_sp) 1953 reason = stop_info_sp->GetStopReason(); 1954 if (reason == eStopReasonBreakpoint 1955 || reason == eStopReasonException) 1956 { 1957 if (log) 1958 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 1959 thread_sp->GetProtocolID(), 1960 stop_info_sp->GetDescription()); 1961 stop_looks_like_crash = true; 1962 break; 1963 } 1964 } 1965 } 1966 1967 if (stop_looks_like_crash) 1968 { 1969 if (log) 1970 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1971 m_destroy_tried_resuming = true; 1972 1973 // If we are going to run again before killing, it would be good to suspend all the threads 1974 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1975 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1976 // have to run the risk of letting those threads proceed a bit. 1977 1978 { 1979 Mutex::Locker locker(threads.GetMutex()); 1980 1981 size_t num_threads = threads.GetSize(); 1982 for (size_t i = 0; i < num_threads; i++) 1983 { 1984 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1985 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1986 StopReason reason = eStopReasonInvalid; 1987 if (stop_info_sp) 1988 reason = stop_info_sp->GetStopReason(); 1989 if (reason != eStopReasonBreakpoint 1990 && reason != eStopReasonException) 1991 { 1992 if (log) 1993 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 1994 thread_sp->GetProtocolID()); 1995 thread_sp->SetResumeState(eStateSuspended); 1996 } 1997 } 1998 } 1999 Resume (); 2000 return Destroy(); 2001 } 2002 } 2003 } 2004 } 2005 2006 // Interrupt if our inferior is running... 2007 int exit_status = SIGABRT; 2008 std::string exit_string; 2009 2010 if (m_gdb_comm.IsConnected()) 2011 { 2012 if (m_public_state.GetValue() != eStateAttaching) 2013 { 2014 2015 StringExtractorGDBRemote response; 2016 bool send_async = true; 2017 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 2018 2019 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) 2020 { 2021 char packet_cmd = response.GetChar(0); 2022 2023 if (packet_cmd == 'W' || packet_cmd == 'X') 2024 { 2025 #if defined(__APPLE__) 2026 // For Native processes on Mac OS X, we launch through the Host Platform, then hand the process off 2027 // to debugserver, which becomes the parent process through "PT_ATTACH". Then when we go to kill 2028 // the process on Mac OS X we call ptrace(PT_KILL) to kill it, then we call waitpid which returns 2029 // with no error and the correct status. But amusingly enough that doesn't seem to actually reap 2030 // the process, but instead it is left around as a Zombie. Probably the kernel is in the process of 2031 // switching ownership back to lldb which was the original parent, and gets confused in the handoff. 2032 // Anyway, so call waitpid here to finally reap it. 2033 PlatformSP platform_sp(GetTarget().GetPlatform()); 2034 if (platform_sp && platform_sp->IsHost()) 2035 { 2036 int status; 2037 ::pid_t reap_pid; 2038 reap_pid = waitpid (GetID(), &status, WNOHANG); 2039 if (log) 2040 log->Printf ("Reaped pid: %d, status: %d.\n", reap_pid, status); 2041 } 2042 #endif 2043 SetLastStopPacket (response); 2044 ClearThreadIDList (); 2045 exit_status = response.GetHexU8(); 2046 } 2047 else 2048 { 2049 if (log) 2050 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2051 exit_string.assign("got unexpected response to k packet: "); 2052 exit_string.append(response.GetStringRef()); 2053 } 2054 } 2055 else 2056 { 2057 if (log) 2058 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2059 exit_string.assign("failed to send the k packet"); 2060 } 2061 2062 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 2063 } 2064 else 2065 { 2066 if (log) 2067 log->Printf ("ProcessGDBRemote::DoDestroy - killed or interrupted while attaching"); 2068 exit_string.assign ("killed or interrupted while attaching."); 2069 } 2070 } 2071 else 2072 { 2073 // If we missed setting the exit status on the way out, do it here. 2074 // NB set exit status can be called multiple times, the first one sets the status. 2075 exit_string.assign("destroying when not connected to debugserver"); 2076 } 2077 2078 SetExitStatus(exit_status, exit_string.c_str()); 2079 2080 StopAsyncThread (); 2081 KillDebugserverProcess (); 2082 return error; 2083 } 2084 2085 void 2086 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 2087 { 2088 lldb_private::Mutex::Locker locker (m_last_stop_packet_mutex); 2089 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 2090 if (did_exec) 2091 { 2092 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2093 if (log) 2094 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 2095 2096 m_thread_list_real.Clear(); 2097 m_thread_list.Clear(); 2098 BuildDynamicRegisterInfo (true); 2099 m_gdb_comm.ResetDiscoverableSettings(); 2100 } 2101 m_last_stop_packet = response; 2102 } 2103 2104 2105 //------------------------------------------------------------------ 2106 // Process Queries 2107 //------------------------------------------------------------------ 2108 2109 bool 2110 ProcessGDBRemote::IsAlive () 2111 { 2112 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2113 } 2114 2115 addr_t 2116 ProcessGDBRemote::GetImageInfoAddress() 2117 { 2118 return m_gdb_comm.GetShlibInfoAddr(); 2119 } 2120 2121 //------------------------------------------------------------------ 2122 // Process Memory 2123 //------------------------------------------------------------------ 2124 size_t 2125 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2126 { 2127 GetMaxMemorySize (); 2128 if (size > m_max_memory_size) 2129 { 2130 // Keep memory read sizes down to a sane limit. This function will be 2131 // called multiple times in order to complete the task by 2132 // lldb_private::Process so it is ok to do this. 2133 size = m_max_memory_size; 2134 } 2135 2136 char packet[64]; 2137 int packet_len; 2138 bool binary_memory_read = m_gdb_comm.GetxPacketSupported(); 2139 if (binary_memory_read) 2140 { 2141 packet_len = ::snprintf (packet, sizeof(packet), "x0x%" PRIx64 ",0x%" PRIx64, (uint64_t)addr, (uint64_t)size); 2142 } 2143 else 2144 { 2145 packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2146 } 2147 assert (packet_len + 1 < (int)sizeof(packet)); 2148 StringExtractorGDBRemote response; 2149 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) 2150 { 2151 if (response.IsNormalResponse()) 2152 { 2153 error.Clear(); 2154 if (binary_memory_read) 2155 { 2156 // The lower level GDBRemoteCommunication packet receive layer has already de-quoted any 2157 // 0x7d character escaping that was present in the packet 2158 2159 size_t data_received_size = response.GetBytesLeft(); 2160 if (data_received_size > size) 2161 { 2162 // Don't write past the end of BUF if the remote debug server gave us too 2163 // much data for some reason. 2164 data_received_size = size; 2165 } 2166 memcpy (buf, response.GetStringRef().data(), data_received_size); 2167 return data_received_size; 2168 } 2169 else 2170 { 2171 return response.GetHexBytes(buf, size, '\xdd'); 2172 } 2173 } 2174 else if (response.IsErrorResponse()) 2175 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2176 else if (response.IsUnsupportedResponse()) 2177 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2178 else 2179 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2180 } 2181 else 2182 { 2183 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2184 } 2185 return 0; 2186 } 2187 2188 size_t 2189 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2190 { 2191 GetMaxMemorySize (); 2192 if (size > m_max_memory_size) 2193 { 2194 // Keep memory read sizes down to a sane limit. This function will be 2195 // called multiple times in order to complete the task by 2196 // lldb_private::Process so it is ok to do this. 2197 size = m_max_memory_size; 2198 } 2199 2200 StreamString packet; 2201 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2202 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2203 StringExtractorGDBRemote response; 2204 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) 2205 { 2206 if (response.IsOKResponse()) 2207 { 2208 error.Clear(); 2209 return size; 2210 } 2211 else if (response.IsErrorResponse()) 2212 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2213 else if (response.IsUnsupportedResponse()) 2214 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2215 else 2216 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2217 } 2218 else 2219 { 2220 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 2221 } 2222 return 0; 2223 } 2224 2225 lldb::addr_t 2226 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2227 { 2228 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2229 2230 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2231 switch (supported) 2232 { 2233 case eLazyBoolCalculate: 2234 case eLazyBoolYes: 2235 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2236 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2237 return allocated_addr; 2238 2239 case eLazyBoolNo: 2240 // Call mmap() to create memory in the inferior.. 2241 unsigned prot = 0; 2242 if (permissions & lldb::ePermissionsReadable) 2243 prot |= eMmapProtRead; 2244 if (permissions & lldb::ePermissionsWritable) 2245 prot |= eMmapProtWrite; 2246 if (permissions & lldb::ePermissionsExecutable) 2247 prot |= eMmapProtExec; 2248 2249 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2250 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2251 m_addr_to_mmap_size[allocated_addr] = size; 2252 else 2253 allocated_addr = LLDB_INVALID_ADDRESS; 2254 break; 2255 } 2256 2257 if (allocated_addr == LLDB_INVALID_ADDRESS) 2258 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2259 else 2260 error.Clear(); 2261 return allocated_addr; 2262 } 2263 2264 Error 2265 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2266 MemoryRegionInfo ®ion_info) 2267 { 2268 2269 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2270 return error; 2271 } 2272 2273 Error 2274 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2275 { 2276 2277 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2278 return error; 2279 } 2280 2281 Error 2282 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2283 { 2284 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2285 return error; 2286 } 2287 2288 Error 2289 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2290 { 2291 Error error; 2292 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2293 2294 switch (supported) 2295 { 2296 case eLazyBoolCalculate: 2297 // We should never be deallocating memory without allocating memory 2298 // first so we should never get eLazyBoolCalculate 2299 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2300 break; 2301 2302 case eLazyBoolYes: 2303 if (!m_gdb_comm.DeallocateMemory (addr)) 2304 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2305 break; 2306 2307 case eLazyBoolNo: 2308 // Call munmap() to deallocate memory in the inferior.. 2309 { 2310 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2311 if (pos != m_addr_to_mmap_size.end() && 2312 InferiorCallMunmap(this, addr, pos->second)) 2313 m_addr_to_mmap_size.erase (pos); 2314 else 2315 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2316 } 2317 break; 2318 } 2319 2320 return error; 2321 } 2322 2323 2324 //------------------------------------------------------------------ 2325 // Process STDIO 2326 //------------------------------------------------------------------ 2327 size_t 2328 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2329 { 2330 if (m_stdio_communication.IsConnected()) 2331 { 2332 ConnectionStatus status; 2333 m_stdio_communication.Write(src, src_len, status, NULL); 2334 } 2335 return 0; 2336 } 2337 2338 Error 2339 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2340 { 2341 Error error; 2342 assert(bp_site != NULL); 2343 2344 // Get logging info 2345 Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2346 user_id_t site_id = bp_site->GetID(); 2347 2348 // Get the breakpoint address 2349 const addr_t addr = bp_site->GetLoadAddress(); 2350 2351 // Log that a breakpoint was requested 2352 if (log) 2353 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2354 2355 // Breakpoint already exists and is enabled 2356 if (bp_site->IsEnabled()) 2357 { 2358 if (log) 2359 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2360 return error; 2361 } 2362 2363 // Get the software breakpoint trap opcode size 2364 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2365 2366 // SupportsGDBStoppointPacket() simply checks a boolean, indicating if this breakpoint type 2367 // is supported by the remote stub. These are set to true by default, and later set to false 2368 // only after we receive an unimplemented response when sending a breakpoint packet. This means 2369 // initially that unless we were specifically instructed to use a hardware breakpoint, LLDB will 2370 // attempt to set a software breakpoint. HardwareRequired() also queries a boolean variable which 2371 // indicates if the user specifically asked for hardware breakpoints. If true then we will 2372 // skip over software breakpoints. 2373 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware) && (!bp_site->HardwareRequired())) 2374 { 2375 // Try to send off a software breakpoint packet ($Z0) 2376 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2377 { 2378 // The breakpoint was placed successfully 2379 bp_site->SetEnabled(true); 2380 bp_site->SetType(BreakpointSite::eExternal); 2381 return error; 2382 } 2383 2384 // SendGDBStoppointTypePacket() will return an error if it was unable to set this 2385 // breakpoint. We need to differentiate between a error specific to placing this breakpoint 2386 // or if we have learned that this breakpoint type is unsupported. To do this, we 2387 // must test the support boolean for this breakpoint type to see if it now indicates that 2388 // this breakpoint type is unsupported. If they are still supported then we should return 2389 // with the error code. If they are now unsupported, then we would like to fall through 2390 // and try another form of breakpoint. 2391 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware)) 2392 return error; 2393 2394 // We reach here when software breakpoints have been found to be unsupported. For future 2395 // calls to set a breakpoint, we will not attempt to set a breakpoint with a type that is 2396 // known not to be supported. 2397 if (log) 2398 log->Printf("Software breakpoints are unsupported"); 2399 2400 // So we will fall through and try a hardware breakpoint 2401 } 2402 2403 // The process of setting a hardware breakpoint is much the same as above. We check the 2404 // supported boolean for this breakpoint type, and if it is thought to be supported then we 2405 // will try to set this breakpoint with a hardware breakpoint. 2406 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 2407 { 2408 // Try to send off a hardware breakpoint packet ($Z1) 2409 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2410 { 2411 // The breakpoint was placed successfully 2412 bp_site->SetEnabled(true); 2413 bp_site->SetType(BreakpointSite::eHardware); 2414 return error; 2415 } 2416 2417 // Check if the error was something other then an unsupported breakpoint type 2418 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 2419 { 2420 // Unable to set this hardware breakpoint 2421 error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); 2422 return error; 2423 } 2424 2425 // We will reach here when the stub gives an unsported response to a hardware breakpoint 2426 if (log) 2427 log->Printf("Hardware breakpoints are unsupported"); 2428 2429 // Finally we will falling through to a #trap style breakpoint 2430 } 2431 2432 // Don't fall through when hardware breakpoints were specifically requested 2433 if (bp_site->HardwareRequired()) 2434 { 2435 error.SetErrorString("hardware breakpoints are not supported"); 2436 return error; 2437 } 2438 2439 // As a last resort we want to place a manual breakpoint. An instruction 2440 // is placed into the process memory using memory write packets. 2441 return EnableSoftwareBreakpoint(bp_site); 2442 } 2443 2444 Error 2445 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2446 { 2447 Error error; 2448 assert (bp_site != NULL); 2449 addr_t addr = bp_site->GetLoadAddress(); 2450 user_id_t site_id = bp_site->GetID(); 2451 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2452 if (log) 2453 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2454 2455 if (bp_site->IsEnabled()) 2456 { 2457 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2458 2459 BreakpointSite::Type bp_type = bp_site->GetType(); 2460 switch (bp_type) 2461 { 2462 case BreakpointSite::eSoftware: 2463 error = DisableSoftwareBreakpoint (bp_site); 2464 break; 2465 2466 case BreakpointSite::eHardware: 2467 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, false, addr, bp_op_size)) 2468 error.SetErrorToGenericError(); 2469 break; 2470 2471 case BreakpointSite::eExternal: 2472 { 2473 GDBStoppointType stoppoint_type; 2474 if (bp_site->IsHardware()) 2475 stoppoint_type = eBreakpointHardware; 2476 else 2477 stoppoint_type = eBreakpointSoftware; 2478 2479 if (m_gdb_comm.SendGDBStoppointTypePacket(stoppoint_type, false, addr, bp_op_size)) 2480 error.SetErrorToGenericError(); 2481 } 2482 break; 2483 } 2484 if (error.Success()) 2485 bp_site->SetEnabled(false); 2486 } 2487 else 2488 { 2489 if (log) 2490 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2491 return error; 2492 } 2493 2494 if (error.Success()) 2495 error.SetErrorToGenericError(); 2496 return error; 2497 } 2498 2499 // Pre-requisite: wp != NULL. 2500 static GDBStoppointType 2501 GetGDBStoppointType (Watchpoint *wp) 2502 { 2503 assert(wp); 2504 bool watch_read = wp->WatchpointRead(); 2505 bool watch_write = wp->WatchpointWrite(); 2506 2507 // watch_read and watch_write cannot both be false. 2508 assert(watch_read || watch_write); 2509 if (watch_read && watch_write) 2510 return eWatchpointReadWrite; 2511 else if (watch_read) 2512 return eWatchpointRead; 2513 else // Must be watch_write, then. 2514 return eWatchpointWrite; 2515 } 2516 2517 Error 2518 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2519 { 2520 Error error; 2521 if (wp) 2522 { 2523 user_id_t watchID = wp->GetID(); 2524 addr_t addr = wp->GetLoadAddress(); 2525 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2526 if (log) 2527 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2528 if (wp->IsEnabled()) 2529 { 2530 if (log) 2531 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2532 return error; 2533 } 2534 2535 GDBStoppointType type = GetGDBStoppointType(wp); 2536 // Pass down an appropriate z/Z packet... 2537 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2538 { 2539 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2540 { 2541 wp->SetEnabled(true, notify); 2542 return error; 2543 } 2544 else 2545 error.SetErrorString("sending gdb watchpoint packet failed"); 2546 } 2547 else 2548 error.SetErrorString("watchpoints not supported"); 2549 } 2550 else 2551 { 2552 error.SetErrorString("Watchpoint argument was NULL."); 2553 } 2554 if (error.Success()) 2555 error.SetErrorToGenericError(); 2556 return error; 2557 } 2558 2559 Error 2560 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2561 { 2562 Error error; 2563 if (wp) 2564 { 2565 user_id_t watchID = wp->GetID(); 2566 2567 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2568 2569 addr_t addr = wp->GetLoadAddress(); 2570 2571 if (log) 2572 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2573 2574 if (!wp->IsEnabled()) 2575 { 2576 if (log) 2577 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2578 // See also 'class WatchpointSentry' within StopInfo.cpp. 2579 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2580 // the watchpoint object to intelligently process this action. 2581 wp->SetEnabled(false, notify); 2582 return error; 2583 } 2584 2585 if (wp->IsHardware()) 2586 { 2587 GDBStoppointType type = GetGDBStoppointType(wp); 2588 // Pass down an appropriate z/Z packet... 2589 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2590 { 2591 wp->SetEnabled(false, notify); 2592 return error; 2593 } 2594 else 2595 error.SetErrorString("sending gdb watchpoint packet failed"); 2596 } 2597 // TODO: clear software watchpoints if we implement them 2598 } 2599 else 2600 { 2601 error.SetErrorString("Watchpoint argument was NULL."); 2602 } 2603 if (error.Success()) 2604 error.SetErrorToGenericError(); 2605 return error; 2606 } 2607 2608 void 2609 ProcessGDBRemote::Clear() 2610 { 2611 m_flags = 0; 2612 m_thread_list_real.Clear(); 2613 m_thread_list.Clear(); 2614 } 2615 2616 Error 2617 ProcessGDBRemote::DoSignal (int signo) 2618 { 2619 Error error; 2620 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2621 if (log) 2622 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2623 2624 if (!m_gdb_comm.SendAsyncSignal (signo)) 2625 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2626 return error; 2627 } 2628 2629 Error 2630 ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) 2631 { 2632 Error error; 2633 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2634 { 2635 // If we locate debugserver, keep that located version around 2636 static FileSpec g_debugserver_file_spec; 2637 2638 ProcessLaunchInfo debugserver_launch_info; 2639 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2640 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2641 2642 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__)) 2643 // On iOS, still do a local connection using a random port 2644 const char *hostname = "127.0.0.1"; 2645 uint16_t port = get_random_port (); 2646 #else 2647 // Set hostname being NULL to do the reverse connect where debugserver 2648 // will bind to port zero and it will communicate back to us the port 2649 // that we will connect to 2650 const char *hostname = NULL; 2651 uint16_t port = 0; 2652 #endif 2653 2654 error = m_gdb_comm.StartDebugserverProcess (hostname, 2655 port, 2656 debugserver_launch_info, 2657 port); 2658 2659 if (error.Success ()) 2660 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2661 else 2662 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2663 2664 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2665 StartAsyncThread (); 2666 2667 if (error.Fail()) 2668 { 2669 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2670 2671 if (log) 2672 log->Printf("failed to start debugserver process: %s", error.AsCString()); 2673 return error; 2674 } 2675 2676 if (m_gdb_comm.IsConnected()) 2677 { 2678 // Finish the connection process by doing the handshake without connecting (send NULL URL) 2679 ConnectToDebugserver (NULL); 2680 } 2681 else 2682 { 2683 StreamString connect_url; 2684 connect_url.Printf("connect://%s:%u", hostname, port); 2685 error = ConnectToDebugserver (connect_url.GetString().c_str()); 2686 } 2687 2688 } 2689 return error; 2690 } 2691 2692 bool 2693 ProcessGDBRemote::MonitorDebugserverProcess 2694 ( 2695 void *callback_baton, 2696 lldb::pid_t debugserver_pid, 2697 bool exited, // True if the process did exit 2698 int signo, // Zero for no signal 2699 int exit_status // Exit value of process if signal is zero 2700 ) 2701 { 2702 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2703 // and might not exist anymore, so we need to carefully try to get the 2704 // target for this process first since we have a race condition when 2705 // we are done running between getting the notice that the inferior 2706 // process has died and the debugserver that was debugging this process. 2707 // In our test suite, we are also continually running process after 2708 // process, so we must be very careful to make sure: 2709 // 1 - process object hasn't been deleted already 2710 // 2 - that a new process object hasn't been recreated in its place 2711 2712 // "debugserver_pid" argument passed in is the process ID for 2713 // debugserver that we are tracking... 2714 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2715 2716 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2717 2718 // Get a shared pointer to the target that has a matching process pointer. 2719 // This target could be gone, or the target could already have a new process 2720 // object inside of it 2721 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2722 2723 if (log) 2724 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2725 2726 if (target_sp) 2727 { 2728 // We found a process in a target that matches, but another thread 2729 // might be in the process of launching a new process that will 2730 // soon replace it, so get a shared pointer to the process so we 2731 // can keep it alive. 2732 ProcessSP process_sp (target_sp->GetProcessSP()); 2733 // Now we have a shared pointer to the process that can't go away on us 2734 // so we now make sure it was the same as the one passed in, and also make 2735 // sure that our previous "process *" didn't get deleted and have a new 2736 // "process *" created in its place with the same pointer. To verify this 2737 // we make sure the process has our debugserver process ID. If we pass all 2738 // of these tests, then we are sure that this process is the one we were 2739 // looking for. 2740 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2741 { 2742 // Sleep for a half a second to make sure our inferior process has 2743 // time to set its exit status before we set it incorrectly when 2744 // both the debugserver and the inferior process shut down. 2745 usleep (500000); 2746 // If our process hasn't yet exited, debugserver might have died. 2747 // If the process did exit, the we are reaping it. 2748 const StateType state = process->GetState(); 2749 2750 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2751 state != eStateInvalid && 2752 state != eStateUnloaded && 2753 state != eStateExited && 2754 state != eStateDetached) 2755 { 2756 char error_str[1024]; 2757 if (signo) 2758 { 2759 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2760 if (signal_cstr) 2761 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2762 else 2763 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2764 } 2765 else 2766 { 2767 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2768 } 2769 2770 process->SetExitStatus (-1, error_str); 2771 } 2772 // Debugserver has exited we need to let our ProcessGDBRemote 2773 // know that it no longer has a debugserver instance 2774 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2775 } 2776 } 2777 return true; 2778 } 2779 2780 void 2781 ProcessGDBRemote::KillDebugserverProcess () 2782 { 2783 m_gdb_comm.Disconnect(); 2784 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2785 { 2786 Host::Kill (m_debugserver_pid, SIGINT); 2787 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2788 } 2789 } 2790 2791 void 2792 ProcessGDBRemote::Initialize() 2793 { 2794 static bool g_initialized = false; 2795 2796 if (g_initialized == false) 2797 { 2798 g_initialized = true; 2799 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2800 GetPluginDescriptionStatic(), 2801 CreateInstance, 2802 DebuggerInitialize); 2803 2804 Log::Callbacks log_callbacks = { 2805 ProcessGDBRemoteLog::DisableLog, 2806 ProcessGDBRemoteLog::EnableLog, 2807 ProcessGDBRemoteLog::ListLogCategories 2808 }; 2809 2810 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2811 } 2812 } 2813 2814 void 2815 ProcessGDBRemote::DebuggerInitialize (lldb_private::Debugger &debugger) 2816 { 2817 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 2818 { 2819 const bool is_global_setting = true; 2820 PluginManager::CreateSettingForProcessPlugin (debugger, 2821 GetGlobalPluginProperties()->GetValueProperties(), 2822 ConstString ("Properties for the gdb-remote process plug-in."), 2823 is_global_setting); 2824 } 2825 } 2826 2827 bool 2828 ProcessGDBRemote::StartAsyncThread () 2829 { 2830 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2831 2832 if (log) 2833 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2834 2835 Mutex::Locker start_locker(m_async_thread_state_mutex); 2836 if (m_async_thread_state == eAsyncThreadNotStarted) 2837 { 2838 // Create a thread that watches our internal state and controls which 2839 // events make it to clients (into the DCProcess event queue). 2840 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2841 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2842 { 2843 m_async_thread_state = eAsyncThreadRunning; 2844 return true; 2845 } 2846 else 2847 return false; 2848 } 2849 else 2850 { 2851 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2852 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2853 if (log) 2854 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2855 if (m_async_thread_state == eAsyncThreadRunning) 2856 return true; 2857 else 2858 return false; 2859 } 2860 } 2861 2862 void 2863 ProcessGDBRemote::StopAsyncThread () 2864 { 2865 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2866 2867 if (log) 2868 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2869 2870 Mutex::Locker start_locker(m_async_thread_state_mutex); 2871 if (m_async_thread_state == eAsyncThreadRunning) 2872 { 2873 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2874 2875 // This will shut down the async thread. 2876 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2877 2878 // Stop the stdio thread 2879 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2880 { 2881 Host::ThreadJoin (m_async_thread, NULL, NULL); 2882 } 2883 m_async_thread_state = eAsyncThreadDone; 2884 } 2885 else 2886 { 2887 if (log) 2888 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2889 } 2890 } 2891 2892 2893 thread_result_t 2894 ProcessGDBRemote::AsyncThread (void *arg) 2895 { 2896 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2897 2898 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2899 if (log) 2900 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2901 2902 Listener listener ("ProcessGDBRemote::AsyncThread"); 2903 EventSP event_sp; 2904 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2905 eBroadcastBitAsyncThreadShouldExit; 2906 2907 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2908 { 2909 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2910 2911 bool done = false; 2912 while (!done) 2913 { 2914 if (log) 2915 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2916 if (listener.WaitForEvent (NULL, event_sp)) 2917 { 2918 const uint32_t event_type = event_sp->GetType(); 2919 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2920 { 2921 if (log) 2922 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2923 2924 switch (event_type) 2925 { 2926 case eBroadcastBitAsyncContinue: 2927 { 2928 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2929 2930 if (continue_packet) 2931 { 2932 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2933 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2934 if (log) 2935 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2936 2937 if (::strstr (continue_cstr, "vAttach") == NULL) 2938 process->SetPrivateState(eStateRunning); 2939 StringExtractorGDBRemote response; 2940 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2941 2942 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2943 // The thread ID list might be contained within the "response", or the stop reply packet that 2944 // caused the stop. So clear it now before we give the stop reply packet to the process 2945 // using the process->SetLastStopPacket()... 2946 process->ClearThreadIDList (); 2947 2948 switch (stop_state) 2949 { 2950 case eStateStopped: 2951 case eStateCrashed: 2952 case eStateSuspended: 2953 process->SetLastStopPacket (response); 2954 process->SetPrivateState (stop_state); 2955 break; 2956 2957 case eStateExited: 2958 { 2959 process->SetLastStopPacket (response); 2960 process->ClearThreadIDList(); 2961 response.SetFilePos(1); 2962 2963 int exit_status = response.GetHexU8(); 2964 const char *desc_cstr = NULL; 2965 StringExtractor extractor; 2966 std::string desc_string; 2967 if (response.GetBytesLeft() > 0 && response.GetChar('-') == ';') 2968 { 2969 std::string desc_token; 2970 while (response.GetNameColonValue (desc_token, desc_string)) 2971 { 2972 if (desc_token == "description") 2973 { 2974 extractor.GetStringRef().swap(desc_string); 2975 extractor.SetFilePos(0); 2976 extractor.GetHexByteString (desc_string); 2977 desc_cstr = desc_string.c_str(); 2978 } 2979 } 2980 } 2981 process->SetExitStatus(exit_status, desc_cstr); 2982 done = true; 2983 break; 2984 } 2985 case eStateInvalid: 2986 process->SetExitStatus(-1, "lost connection"); 2987 break; 2988 2989 default: 2990 process->SetPrivateState (stop_state); 2991 break; 2992 } 2993 } 2994 } 2995 break; 2996 2997 case eBroadcastBitAsyncThreadShouldExit: 2998 if (log) 2999 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 3000 done = true; 3001 break; 3002 3003 default: 3004 if (log) 3005 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 3006 done = true; 3007 break; 3008 } 3009 } 3010 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 3011 { 3012 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 3013 { 3014 process->SetExitStatus (-1, "lost connection"); 3015 done = true; 3016 } 3017 } 3018 } 3019 else 3020 { 3021 if (log) 3022 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 3023 done = true; 3024 } 3025 } 3026 } 3027 3028 if (log) 3029 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 3030 3031 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 3032 return NULL; 3033 } 3034 3035 //uint32_t 3036 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 3037 //{ 3038 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 3039 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 3040 // if (m_local_debugserver) 3041 // { 3042 // return Host::ListProcessesMatchingName (name, matches, pids); 3043 // } 3044 // else 3045 // { 3046 // // FIXME: Implement talking to the remote debugserver. 3047 // return 0; 3048 // } 3049 // 3050 //} 3051 // 3052 bool 3053 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 3054 lldb_private::StoppointCallbackContext *context, 3055 lldb::user_id_t break_id, 3056 lldb::user_id_t break_loc_id) 3057 { 3058 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 3059 // run so I can stop it if that's what I want to do. 3060 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3061 if (log) 3062 log->Printf("Hit New Thread Notification breakpoint."); 3063 return false; 3064 } 3065 3066 3067 bool 3068 ProcessGDBRemote::StartNoticingNewThreads() 3069 { 3070 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3071 if (m_thread_create_bp_sp) 3072 { 3073 if (log && log->GetVerbose()) 3074 log->Printf("Enabled noticing new thread breakpoint."); 3075 m_thread_create_bp_sp->SetEnabled(true); 3076 } 3077 else 3078 { 3079 PlatformSP platform_sp (m_target.GetPlatform()); 3080 if (platform_sp) 3081 { 3082 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3083 if (m_thread_create_bp_sp) 3084 { 3085 if (log && log->GetVerbose()) 3086 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3087 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3088 } 3089 else 3090 { 3091 if (log) 3092 log->Printf("Failed to create new thread notification breakpoint."); 3093 } 3094 } 3095 } 3096 return m_thread_create_bp_sp.get() != NULL; 3097 } 3098 3099 bool 3100 ProcessGDBRemote::StopNoticingNewThreads() 3101 { 3102 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3103 if (log && log->GetVerbose()) 3104 log->Printf ("Disabling new thread notification breakpoint."); 3105 3106 if (m_thread_create_bp_sp) 3107 m_thread_create_bp_sp->SetEnabled(false); 3108 3109 return true; 3110 } 3111 3112 lldb_private::DynamicLoader * 3113 ProcessGDBRemote::GetDynamicLoader () 3114 { 3115 if (m_dyld_ap.get() == NULL) 3116 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3117 return m_dyld_ap.get(); 3118 } 3119 3120 Error 3121 ProcessGDBRemote::SendEventData(const char *data) 3122 { 3123 int return_value; 3124 bool was_supported; 3125 3126 Error error; 3127 3128 return_value = m_gdb_comm.SendLaunchEventDataPacket (data, &was_supported); 3129 if (return_value != 0) 3130 { 3131 if (!was_supported) 3132 error.SetErrorString("Sending events is not supported for this process."); 3133 else 3134 error.SetErrorStringWithFormat("Error sending event data: %d.", return_value); 3135 } 3136 return error; 3137 } 3138 3139 const DataBufferSP 3140 ProcessGDBRemote::GetAuxvData() 3141 { 3142 DataBufferSP buf; 3143 if (m_gdb_comm.GetQXferAuxvReadSupported()) 3144 { 3145 std::string response_string; 3146 if (m_gdb_comm.SendPacketsAndConcatenateResponses("qXfer:auxv:read::", response_string) == GDBRemoteCommunication::PacketResult::Success) 3147 buf.reset(new DataBufferHeap(response_string.c_str(), response_string.length())); 3148 } 3149 return buf; 3150 } 3151 3152 // Establish the largest memory read/write payloads we should use. 3153 // If the remote stub has a max packet size, stay under that size. 3154 // 3155 // If the remote stub's max packet size is crazy large, use a 3156 // reasonable largeish default. 3157 // 3158 // If the remote stub doesn't advertise a max packet size, use a 3159 // conservative default. 3160 3161 void 3162 ProcessGDBRemote::GetMaxMemorySize() 3163 { 3164 const uint64_t reasonable_largeish_default = 128 * 1024; 3165 const uint64_t conservative_default = 512; 3166 3167 if (m_max_memory_size == 0) 3168 { 3169 uint64_t stub_max_size = m_gdb_comm.GetRemoteMaxPacketSize(); 3170 if (stub_max_size != UINT64_MAX && stub_max_size != 0) 3171 { 3172 // Save the stub's claimed maximum packet size 3173 m_remote_stub_max_memory_size = stub_max_size; 3174 3175 // Even if the stub says it can support ginormous packets, 3176 // don't exceed our resonable largeish default packet size. 3177 if (stub_max_size > reasonable_largeish_default) 3178 { 3179 stub_max_size = reasonable_largeish_default; 3180 } 3181 3182 m_max_memory_size = stub_max_size; 3183 } 3184 else 3185 { 3186 m_max_memory_size = conservative_default; 3187 } 3188 } 3189 } 3190 3191 void 3192 ProcessGDBRemote::SetUserSpecifiedMaxMemoryTransferSize (uint64_t user_specified_max) 3193 { 3194 if (user_specified_max != 0) 3195 { 3196 GetMaxMemorySize (); 3197 3198 if (m_remote_stub_max_memory_size != 0) 3199 { 3200 if (m_remote_stub_max_memory_size < user_specified_max) 3201 { 3202 m_max_memory_size = m_remote_stub_max_memory_size; // user specified a packet size too big, go as big 3203 // as the remote stub says we can go. 3204 } 3205 else 3206 { 3207 m_max_memory_size = user_specified_max; // user's packet size is good 3208 } 3209 } 3210 else 3211 { 3212 m_max_memory_size = user_specified_max; // user's packet size is probably fine 3213 } 3214 } 3215 } 3216 3217 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 3218 { 3219 private: 3220 3221 public: 3222 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3223 CommandObjectParsed (interpreter, 3224 "process plugin packet history", 3225 "Dumps the packet history buffer. ", 3226 NULL) 3227 { 3228 } 3229 3230 ~CommandObjectProcessGDBRemotePacketHistory () 3231 { 3232 } 3233 3234 bool 3235 DoExecute (Args& command, CommandReturnObject &result) 3236 { 3237 const size_t argc = command.GetArgumentCount(); 3238 if (argc == 0) 3239 { 3240 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3241 if (process) 3242 { 3243 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3244 result.SetStatus (eReturnStatusSuccessFinishResult); 3245 return true; 3246 } 3247 } 3248 else 3249 { 3250 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3251 } 3252 result.SetStatus (eReturnStatusFailed); 3253 return false; 3254 } 3255 }; 3256 3257 class CommandObjectProcessGDBRemotePacketXferSize : public CommandObjectParsed 3258 { 3259 private: 3260 3261 public: 3262 CommandObjectProcessGDBRemotePacketXferSize(CommandInterpreter &interpreter) : 3263 CommandObjectParsed (interpreter, 3264 "process plugin packet xfer-size", 3265 "Maximum size that lldb will try to read/write one one chunk.", 3266 NULL) 3267 { 3268 } 3269 3270 ~CommandObjectProcessGDBRemotePacketXferSize () 3271 { 3272 } 3273 3274 bool 3275 DoExecute (Args& command, CommandReturnObject &result) 3276 { 3277 const size_t argc = command.GetArgumentCount(); 3278 if (argc == 0) 3279 { 3280 result.AppendErrorWithFormat ("'%s' takes an argument to specify the max amount to be transferred when reading/writing", m_cmd_name.c_str()); 3281 result.SetStatus (eReturnStatusFailed); 3282 return false; 3283 } 3284 3285 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3286 if (process) 3287 { 3288 const char *packet_size = command.GetArgumentAtIndex(0); 3289 errno = 0; 3290 uint64_t user_specified_max = strtoul (packet_size, NULL, 10); 3291 if (errno == 0 && user_specified_max != 0) 3292 { 3293 process->SetUserSpecifiedMaxMemoryTransferSize (user_specified_max); 3294 result.SetStatus (eReturnStatusSuccessFinishResult); 3295 return true; 3296 } 3297 } 3298 result.SetStatus (eReturnStatusFailed); 3299 return false; 3300 } 3301 }; 3302 3303 3304 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3305 { 3306 private: 3307 3308 public: 3309 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3310 CommandObjectParsed (interpreter, 3311 "process plugin packet send", 3312 "Send a custom packet through the GDB remote protocol and print the answer. " 3313 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3314 NULL) 3315 { 3316 } 3317 3318 ~CommandObjectProcessGDBRemotePacketSend () 3319 { 3320 } 3321 3322 bool 3323 DoExecute (Args& command, CommandReturnObject &result) 3324 { 3325 const size_t argc = command.GetArgumentCount(); 3326 if (argc == 0) 3327 { 3328 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3329 result.SetStatus (eReturnStatusFailed); 3330 return false; 3331 } 3332 3333 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3334 if (process) 3335 { 3336 for (size_t i=0; i<argc; ++ i) 3337 { 3338 const char *packet_cstr = command.GetArgumentAtIndex(0); 3339 bool send_async = true; 3340 StringExtractorGDBRemote response; 3341 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3342 result.SetStatus (eReturnStatusSuccessFinishResult); 3343 Stream &output_strm = result.GetOutputStream(); 3344 output_strm.Printf (" packet: %s\n", packet_cstr); 3345 std::string &response_str = response.GetStringRef(); 3346 3347 if (strstr(packet_cstr, "qGetProfileData") != NULL) 3348 { 3349 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3350 } 3351 3352 if (response_str.empty()) 3353 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3354 else 3355 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3356 } 3357 } 3358 return true; 3359 } 3360 }; 3361 3362 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3363 { 3364 private: 3365 3366 public: 3367 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3368 CommandObjectRaw (interpreter, 3369 "process plugin packet monitor", 3370 "Send a qRcmd packet through the GDB remote protocol and print the response." 3371 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3372 NULL) 3373 { 3374 } 3375 3376 ~CommandObjectProcessGDBRemotePacketMonitor () 3377 { 3378 } 3379 3380 bool 3381 DoExecute (const char *command, CommandReturnObject &result) 3382 { 3383 if (command == NULL || command[0] == '\0') 3384 { 3385 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3386 result.SetStatus (eReturnStatusFailed); 3387 return false; 3388 } 3389 3390 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3391 if (process) 3392 { 3393 StreamString packet; 3394 packet.PutCString("qRcmd,"); 3395 packet.PutBytesAsRawHex8(command, strlen(command)); 3396 const char *packet_cstr = packet.GetString().c_str(); 3397 3398 bool send_async = true; 3399 StringExtractorGDBRemote response; 3400 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3401 result.SetStatus (eReturnStatusSuccessFinishResult); 3402 Stream &output_strm = result.GetOutputStream(); 3403 output_strm.Printf (" packet: %s\n", packet_cstr); 3404 const std::string &response_str = response.GetStringRef(); 3405 3406 if (response_str.empty()) 3407 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3408 else 3409 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3410 } 3411 return true; 3412 } 3413 }; 3414 3415 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3416 { 3417 private: 3418 3419 public: 3420 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3421 CommandObjectMultiword (interpreter, 3422 "process plugin packet", 3423 "Commands that deal with GDB remote packets.", 3424 NULL) 3425 { 3426 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3427 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3428 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3429 LoadSubCommand ("xfer-size", CommandObjectSP (new CommandObjectProcessGDBRemotePacketXferSize (interpreter))); 3430 } 3431 3432 ~CommandObjectProcessGDBRemotePacket () 3433 { 3434 } 3435 }; 3436 3437 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3438 { 3439 public: 3440 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3441 CommandObjectMultiword (interpreter, 3442 "process plugin", 3443 "A set of commands for operating on a ProcessGDBRemote process.", 3444 "process plugin <subcommand> [<subcommand-options>]") 3445 { 3446 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3447 } 3448 3449 ~CommandObjectMultiwordProcessGDBRemote () 3450 { 3451 } 3452 }; 3453 3454 CommandObject * 3455 ProcessGDBRemote::GetPluginCommandObject() 3456 { 3457 if (!m_command_sp) 3458 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3459 return m_command_sp.get(); 3460 } 3461