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 <netinet/in.h> 18 #include <sys/mman.h> // for mmap 19 #endif 20 #include <sys/stat.h> 21 #include <sys/types.h> 22 #include <time.h> 23 24 // C++ Includes 25 #include <algorithm> 26 #include <map> 27 #include <mutex> 28 29 // Other libraries and framework includes 30 #if defined( LIBXML2_DEFINED ) 31 #include <libxml/xmlreader.h> 32 #endif 33 34 #include "lldb/Breakpoint/Watchpoint.h" 35 #include "lldb/Interpreter/Args.h" 36 #include "lldb/Core/ArchSpec.h" 37 #include "lldb/Core/Debugger.h" 38 #include "lldb/Host/ConnectionFileDescriptor.h" 39 #include "lldb/Host/FileSpec.h" 40 #include "lldb/Core/Module.h" 41 #include "lldb/Core/ModuleSpec.h" 42 #include "lldb/Core/PluginManager.h" 43 #include "lldb/Core/State.h" 44 #include "lldb/Core/StreamFile.h" 45 #include "lldb/Core/StreamString.h" 46 #include "lldb/Core/Timer.h" 47 #include "lldb/Core/Value.h" 48 #include "lldb/Host/HostThread.h" 49 #include "lldb/Host/StringConvert.h" 50 #include "lldb/Host/Symbols.h" 51 #include "lldb/Host/ThreadLauncher.h" 52 #include "lldb/Host/TimeValue.h" 53 #include "lldb/Interpreter/CommandInterpreter.h" 54 #include "lldb/Interpreter/CommandObject.h" 55 #include "lldb/Interpreter/CommandObjectMultiword.h" 56 #include "lldb/Interpreter/CommandReturnObject.h" 57 #include "lldb/Interpreter/OptionValueProperties.h" 58 #include "lldb/Interpreter/Property.h" 59 #include "lldb/Symbol/ObjectFile.h" 60 #include "lldb/Target/DynamicLoader.h" 61 #include "lldb/Target/Target.h" 62 #include "lldb/Target/TargetList.h" 63 #include "lldb/Target/ThreadPlanCallFunction.h" 64 #include "lldb/Target/SystemRuntime.h" 65 #include "lldb/Utility/PseudoTerminal.h" 66 67 // Project includes 68 #include "lldb/Host/Host.h" 69 #include "Plugins/Process/Utility/FreeBSDSignals.h" 70 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 71 #include "Plugins/Process/Utility/LinuxSignals.h" 72 #include "Plugins/Process/Utility/MipsLinuxSignals.h" 73 #include "Plugins/Process/Utility/StopInfoMachException.h" 74 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 75 #include "Utility/StringExtractorGDBRemote.h" 76 #include "GDBRemoteRegisterContext.h" 77 #include "ProcessGDBRemote.h" 78 #include "ProcessGDBRemoteLog.h" 79 #include "ThreadGDBRemote.h" 80 81 #define DEBUGSERVER_BASENAME "debugserver" 82 using namespace lldb; 83 using namespace lldb_private; 84 using namespace lldb_private::process_gdb_remote; 85 86 namespace lldb 87 { 88 // Provide a function that can easily dump the packet history if we know a 89 // ProcessGDBRemote * value (which we can get from logs or from debugging). 90 // We need the function in the lldb namespace so it makes it into the final 91 // executable since the LLDB shared library only exports stuff in the lldb 92 // namespace. This allows you to attach with a debugger and call this 93 // function and get the packet history dumped to a file. 94 void 95 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 96 { 97 StreamFile strm; 98 Error error (strm.GetFile().Open(path, File::eOpenOptionWrite | File::eOpenOptionCanCreate)); 99 if (error.Success()) 100 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 101 } 102 } 103 104 namespace { 105 106 static PropertyDefinition 107 g_properties[] = 108 { 109 { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, 110 { "target-definition-file" , OptionValue::eTypeFileSpec , true, 0 , NULL, NULL, "The file that provides the description for remote target registers." }, 111 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 112 }; 113 114 enum 115 { 116 ePropertyPacketTimeout, 117 ePropertyTargetDefinitionFile 118 }; 119 120 class PluginProperties : public Properties 121 { 122 public: 123 124 static ConstString 125 GetSettingName () 126 { 127 return ProcessGDBRemote::GetPluginNameStatic(); 128 } 129 130 PluginProperties() : 131 Properties () 132 { 133 m_collection_sp.reset (new OptionValueProperties(GetSettingName())); 134 m_collection_sp->Initialize(g_properties); 135 } 136 137 virtual 138 ~PluginProperties() 139 { 140 } 141 142 uint64_t 143 GetPacketTimeout() 144 { 145 const uint32_t idx = ePropertyPacketTimeout; 146 return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); 147 } 148 149 bool 150 SetPacketTimeout(uint64_t timeout) 151 { 152 const uint32_t idx = ePropertyPacketTimeout; 153 return m_collection_sp->SetPropertyAtIndexAsUInt64(NULL, idx, timeout); 154 } 155 156 FileSpec 157 GetTargetDefinitionFile () const 158 { 159 const uint32_t idx = ePropertyTargetDefinitionFile; 160 return m_collection_sp->GetPropertyAtIndexAsFileSpec (NULL, idx); 161 } 162 }; 163 164 typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; 165 166 static const ProcessKDPPropertiesSP & 167 GetGlobalPluginProperties() 168 { 169 static ProcessKDPPropertiesSP g_settings_sp; 170 if (!g_settings_sp) 171 g_settings_sp.reset (new PluginProperties ()); 172 return g_settings_sp; 173 } 174 175 } // anonymous namespace end 176 177 class ProcessGDBRemote::GDBLoadedModuleInfoList 178 { 179 public: 180 181 class LoadedModuleInfo 182 { 183 public: 184 185 enum e_data_point 186 { 187 e_has_name = 0, 188 e_has_base , 189 e_has_dynamic , 190 e_has_link_map , 191 e_num 192 }; 193 194 LoadedModuleInfo () 195 { 196 for (uint32_t i = 0; i < e_num; ++i) 197 m_has[i] = false; 198 }; 199 200 void set_name (const std::string & name) 201 { 202 m_name = name; 203 m_has[e_has_name] = true; 204 } 205 bool get_name (std::string & out) const 206 { 207 out = m_name; 208 return m_has[e_has_name]; 209 } 210 211 void set_base (const lldb::addr_t base) 212 { 213 m_base = base; 214 m_has[e_has_base] = true; 215 } 216 bool get_base (lldb::addr_t & out) const 217 { 218 out = m_base; 219 return m_has[e_has_base]; 220 } 221 222 void set_link_map (const lldb::addr_t addr) 223 { 224 m_link_map = addr; 225 m_has[e_has_link_map] = true; 226 } 227 bool get_link_map (lldb::addr_t & out) const 228 { 229 out = m_link_map; 230 return m_has[e_has_link_map]; 231 } 232 233 void set_dynamic (const lldb::addr_t addr) 234 { 235 m_dynamic = addr; 236 m_has[e_has_dynamic] = true; 237 } 238 bool get_dynamic (lldb::addr_t & out) const 239 { 240 out = m_dynamic; 241 return m_has[e_has_dynamic]; 242 } 243 244 bool has_info (e_data_point datum) 245 { 246 assert (datum < e_num); 247 return m_has[datum]; 248 } 249 250 protected: 251 252 bool m_has[e_num]; 253 std::string m_name; 254 lldb::addr_t m_link_map; 255 lldb::addr_t m_base; 256 lldb::addr_t m_dynamic; 257 }; 258 259 GDBLoadedModuleInfoList () 260 : m_list () 261 , m_link_map (LLDB_INVALID_ADDRESS) 262 {} 263 264 void add (const LoadedModuleInfo & mod) 265 { 266 m_list.push_back (mod); 267 } 268 269 void clear () 270 { 271 m_list.clear (); 272 } 273 274 std::vector<LoadedModuleInfo> m_list; 275 lldb::addr_t m_link_map; 276 }; 277 278 // TODO Randomly assigning a port is unsafe. We should get an unused 279 // ephemeral port from the kernel and make sure we reserve it before passing 280 // it to debugserver. 281 282 #if defined (__APPLE__) 283 #define LOW_PORT (IPPORT_RESERVED) 284 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 285 #else 286 #define LOW_PORT (1024u) 287 #define HIGH_PORT (49151u) 288 #endif 289 290 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__) || defined(__aarch64__)) 291 static bool rand_initialized = false; 292 293 static inline uint16_t 294 get_random_port () 295 { 296 if (!rand_initialized) 297 { 298 time_t seed = time(NULL); 299 300 rand_initialized = true; 301 srand(seed); 302 } 303 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 304 } 305 #endif 306 307 ConstString 308 ProcessGDBRemote::GetPluginNameStatic() 309 { 310 static ConstString g_name("gdb-remote"); 311 return g_name; 312 } 313 314 const char * 315 ProcessGDBRemote::GetPluginDescriptionStatic() 316 { 317 return "GDB Remote protocol based debugging plug-in."; 318 } 319 320 void 321 ProcessGDBRemote::Terminate() 322 { 323 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 324 } 325 326 327 lldb::ProcessSP 328 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 329 { 330 lldb::ProcessSP process_sp; 331 if (crash_file_path == NULL) 332 process_sp.reset (new ProcessGDBRemote (target, listener)); 333 return process_sp; 334 } 335 336 bool 337 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 338 { 339 if (plugin_specified_by_name) 340 return true; 341 342 // For now we are just making sure the file exists for a given module 343 Module *exe_module = target.GetExecutableModulePointer(); 344 if (exe_module) 345 { 346 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 347 // We can't debug core files... 348 switch (exe_objfile->GetType()) 349 { 350 case ObjectFile::eTypeInvalid: 351 case ObjectFile::eTypeCoreFile: 352 case ObjectFile::eTypeDebugInfo: 353 case ObjectFile::eTypeObjectFile: 354 case ObjectFile::eTypeSharedLibrary: 355 case ObjectFile::eTypeStubLibrary: 356 case ObjectFile::eTypeJIT: 357 return false; 358 case ObjectFile::eTypeExecutable: 359 case ObjectFile::eTypeDynamicLinker: 360 case ObjectFile::eTypeUnknown: 361 break; 362 } 363 return exe_module->GetFileSpec().Exists(); 364 } 365 // However, if there is no executable module, we return true since we might be preparing to attach. 366 return true; 367 } 368 369 //---------------------------------------------------------------------- 370 // ProcessGDBRemote constructor 371 //---------------------------------------------------------------------- 372 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 373 Process (target, listener), 374 m_flags (0), 375 m_gdb_comm (), 376 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 377 m_last_stop_packet (), 378 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 379 m_register_info (), 380 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 381 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 382 m_thread_ids (), 383 m_continue_c_tids (), 384 m_continue_C_tids (), 385 m_continue_s_tids (), 386 m_continue_S_tids (), 387 m_max_memory_size (0), 388 m_remote_stub_max_memory_size (0), 389 m_addr_to_mmap_size (), 390 m_thread_create_bp_sp (), 391 m_waiting_for_attach (false), 392 m_destroy_tried_resuming (false), 393 m_command_sp (), 394 m_breakpoint_pc_offset (0), 395 m_initial_tid (LLDB_INVALID_THREAD_ID) 396 { 397 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 398 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 399 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 400 const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); 401 if (timeout_seconds > 0) 402 m_gdb_comm.SetPacketTimeout(timeout_seconds); 403 } 404 405 //---------------------------------------------------------------------- 406 // Destructor 407 //---------------------------------------------------------------------- 408 ProcessGDBRemote::~ProcessGDBRemote() 409 { 410 // m_mach_process.UnregisterNotificationCallbacks (this); 411 Clear(); 412 // We need to call finalize on the process before destroying ourselves 413 // to make sure all of the broadcaster cleanup goes as planned. If we 414 // destruct this class, then Process::~Process() might have problems 415 // trying to fully destroy the broadcaster. 416 Finalize(); 417 418 // The general Finalize is going to try to destroy the process and that SHOULD 419 // shut down the async thread. However, if we don't kill it it will get stranded and 420 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 421 StopAsyncThread(); 422 KillDebugserverProcess(); 423 } 424 425 //---------------------------------------------------------------------- 426 // PluginInterface 427 //---------------------------------------------------------------------- 428 ConstString 429 ProcessGDBRemote::GetPluginName() 430 { 431 return GetPluginNameStatic(); 432 } 433 434 uint32_t 435 ProcessGDBRemote::GetPluginVersion() 436 { 437 return 1; 438 } 439 440 bool 441 ProcessGDBRemote::ParsePythonTargetDefinition(const FileSpec &target_definition_fspec) 442 { 443 ScriptInterpreter *interpreter = GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 444 Error error; 445 StructuredData::ObjectSP module_object_sp(interpreter->LoadPluginModule(target_definition_fspec, error)); 446 if (module_object_sp) 447 { 448 StructuredData::DictionarySP target_definition_sp( 449 interpreter->GetDynamicSettings(module_object_sp, &GetTarget(), "gdb-server-target-definition", error)); 450 451 if (target_definition_sp) 452 { 453 StructuredData::ObjectSP target_object(target_definition_sp->GetValueForKey("host-info")); 454 if (target_object) 455 { 456 if (auto host_info_dict = target_object->GetAsDictionary()) 457 { 458 StructuredData::ObjectSP triple_value = host_info_dict->GetValueForKey("triple"); 459 if (auto triple_string_value = triple_value->GetAsString()) 460 { 461 std::string triple_string = triple_string_value->GetValue(); 462 ArchSpec host_arch(triple_string.c_str()); 463 if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) 464 { 465 GetTarget().SetArchitecture(host_arch); 466 } 467 } 468 } 469 } 470 m_breakpoint_pc_offset = 0; 471 StructuredData::ObjectSP breakpoint_pc_offset_value = target_definition_sp->GetValueForKey("breakpoint-pc-offset"); 472 if (breakpoint_pc_offset_value) 473 { 474 if (auto breakpoint_pc_int_value = breakpoint_pc_offset_value->GetAsInteger()) 475 m_breakpoint_pc_offset = breakpoint_pc_int_value->GetValue(); 476 } 477 478 if (m_register_info.SetRegisterInfo(*target_definition_sp, GetTarget().GetArchitecture().GetByteOrder()) > 0) 479 { 480 return true; 481 } 482 } 483 } 484 return false; 485 } 486 487 488 void 489 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 490 { 491 if (!force && m_register_info.GetNumRegisters() > 0) 492 return; 493 494 char packet[128]; 495 m_register_info.Clear(); 496 uint32_t reg_offset = 0; 497 uint32_t reg_num = 0; 498 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 499 response_type == StringExtractorGDBRemote::eResponse; 500 ++reg_num) 501 { 502 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 503 assert (packet_len < (int)sizeof(packet)); 504 StringExtractorGDBRemote response; 505 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false) == GDBRemoteCommunication::PacketResult::Success) 506 { 507 response_type = response.GetResponseType(); 508 if (response_type == StringExtractorGDBRemote::eResponse) 509 { 510 std::string name; 511 std::string value; 512 ConstString reg_name; 513 ConstString alt_name; 514 ConstString set_name; 515 std::vector<uint32_t> value_regs; 516 std::vector<uint32_t> invalidate_regs; 517 RegisterInfo reg_info = { NULL, // Name 518 NULL, // Alt name 519 0, // byte size 520 reg_offset, // offset 521 eEncodingUint, // encoding 522 eFormatHex, // formate 523 { 524 LLDB_INVALID_REGNUM, // GCC reg num 525 LLDB_INVALID_REGNUM, // DWARF reg num 526 LLDB_INVALID_REGNUM, // generic reg num 527 reg_num, // GDB reg num 528 reg_num // native register number 529 }, 530 NULL, 531 NULL 532 }; 533 534 while (response.GetNameColonValue(name, value)) 535 { 536 if (name.compare("name") == 0) 537 { 538 reg_name.SetCString(value.c_str()); 539 } 540 else if (name.compare("alt-name") == 0) 541 { 542 alt_name.SetCString(value.c_str()); 543 } 544 else if (name.compare("bitsize") == 0) 545 { 546 reg_info.byte_size = StringConvert::ToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 547 } 548 else if (name.compare("offset") == 0) 549 { 550 uint32_t offset = StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0); 551 if (reg_offset != offset) 552 { 553 reg_offset = offset; 554 } 555 } 556 else if (name.compare("encoding") == 0) 557 { 558 const Encoding encoding = Args::StringToEncoding (value.c_str()); 559 if (encoding != eEncodingInvalid) 560 reg_info.encoding = encoding; 561 } 562 else if (name.compare("format") == 0) 563 { 564 Format format = eFormatInvalid; 565 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 566 reg_info.format = format; 567 else if (value.compare("binary") == 0) 568 reg_info.format = eFormatBinary; 569 else if (value.compare("decimal") == 0) 570 reg_info.format = eFormatDecimal; 571 else if (value.compare("hex") == 0) 572 reg_info.format = eFormatHex; 573 else if (value.compare("float") == 0) 574 reg_info.format = eFormatFloat; 575 else if (value.compare("vector-sint8") == 0) 576 reg_info.format = eFormatVectorOfSInt8; 577 else if (value.compare("vector-uint8") == 0) 578 reg_info.format = eFormatVectorOfUInt8; 579 else if (value.compare("vector-sint16") == 0) 580 reg_info.format = eFormatVectorOfSInt16; 581 else if (value.compare("vector-uint16") == 0) 582 reg_info.format = eFormatVectorOfUInt16; 583 else if (value.compare("vector-sint32") == 0) 584 reg_info.format = eFormatVectorOfSInt32; 585 else if (value.compare("vector-uint32") == 0) 586 reg_info.format = eFormatVectorOfUInt32; 587 else if (value.compare("vector-float32") == 0) 588 reg_info.format = eFormatVectorOfFloat32; 589 else if (value.compare("vector-uint128") == 0) 590 reg_info.format = eFormatVectorOfUInt128; 591 } 592 else if (name.compare("set") == 0) 593 { 594 set_name.SetCString(value.c_str()); 595 } 596 else if (name.compare("gcc") == 0) 597 { 598 reg_info.kinds[eRegisterKindGCC] = StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 599 } 600 else if (name.compare("dwarf") == 0) 601 { 602 reg_info.kinds[eRegisterKindDWARF] = StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 603 } 604 else if (name.compare("generic") == 0) 605 { 606 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 607 } 608 else if (name.compare("container-regs") == 0) 609 { 610 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 611 value_pair.second = value; 612 do 613 { 614 value_pair = value_pair.second.split(','); 615 if (!value_pair.first.empty()) 616 { 617 uint32_t reg = StringConvert::ToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 618 if (reg != LLDB_INVALID_REGNUM) 619 value_regs.push_back (reg); 620 } 621 } while (!value_pair.second.empty()); 622 } 623 else if (name.compare("invalidate-regs") == 0) 624 { 625 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 626 value_pair.second = value; 627 do 628 { 629 value_pair = value_pair.second.split(','); 630 if (!value_pair.first.empty()) 631 { 632 uint32_t reg = StringConvert::ToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 633 if (reg != LLDB_INVALID_REGNUM) 634 invalidate_regs.push_back (reg); 635 } 636 } while (!value_pair.second.empty()); 637 } 638 } 639 640 reg_info.byte_offset = reg_offset; 641 assert (reg_info.byte_size != 0); 642 reg_offset += reg_info.byte_size; 643 if (!value_regs.empty()) 644 { 645 value_regs.push_back(LLDB_INVALID_REGNUM); 646 reg_info.value_regs = value_regs.data(); 647 } 648 if (!invalidate_regs.empty()) 649 { 650 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 651 reg_info.invalidate_regs = invalidate_regs.data(); 652 } 653 654 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 655 } 656 else 657 { 658 break; // ensure exit before reg_num is incremented 659 } 660 } 661 else 662 { 663 break; 664 } 665 } 666 667 // Check if qHostInfo specified a specific packet timeout for this connection. 668 // If so then lets update our setting so the user knows what the timeout is 669 // and can see it. 670 const uint32_t host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout(); 671 if (host_packet_timeout) 672 { 673 GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout); 674 } 675 676 677 if (reg_num == 0) 678 { 679 // try to extract information from servers target.xml 680 if (GetGDBServerRegisterInfo ()) 681 return; 682 683 FileSpec target_definition_fspec = GetGlobalPluginProperties()->GetTargetDefinitionFile (); 684 685 if (target_definition_fspec) 686 { 687 // See if we can get register definitions from a python file 688 if (ParsePythonTargetDefinition (target_definition_fspec)) 689 return; 690 } 691 } 692 693 // We didn't get anything if the accumulated reg_num is zero. See if we are 694 // debugging ARM and fill with a hard coded register set until we can get an 695 // updated debugserver down on the devices. 696 // On the other hand, if the accumulated reg_num is positive, see if we can 697 // add composite registers to the existing primordial ones. 698 bool from_scratch = (reg_num == 0); 699 700 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 701 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 702 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 703 704 // Use the process' architecture instead of the host arch, if available 705 ArchSpec remote_arch; 706 if (remote_process_arch.IsValid ()) 707 remote_arch = remote_process_arch; 708 else 709 remote_arch = remote_host_arch; 710 711 if (!target_arch.IsValid()) 712 { 713 if (remote_arch.IsValid() 714 && remote_arch.GetMachine() == llvm::Triple::arm 715 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 716 m_register_info.HardcodeARMRegisters(from_scratch); 717 } 718 else if (target_arch.GetMachine() == llvm::Triple::arm) 719 { 720 m_register_info.HardcodeARMRegisters(from_scratch); 721 } 722 723 // At this point, we can finalize our register info. 724 m_register_info.Finalize (); 725 } 726 727 Error 728 ProcessGDBRemote::WillLaunch (Module* module) 729 { 730 return WillLaunchOrAttach (); 731 } 732 733 Error 734 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 735 { 736 return WillLaunchOrAttach (); 737 } 738 739 Error 740 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 741 { 742 return WillLaunchOrAttach (); 743 } 744 745 Error 746 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 747 { 748 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 749 Error error (WillLaunchOrAttach ()); 750 751 if (error.Fail()) 752 return error; 753 754 error = ConnectToDebugserver (remote_url); 755 756 if (error.Fail()) 757 return error; 758 StartAsyncThread (); 759 760 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 761 if (pid == LLDB_INVALID_PROCESS_ID) 762 { 763 // We don't have a valid process ID, so note that we are connected 764 // and could now request to launch or attach, or get remote process 765 // listings... 766 SetPrivateState (eStateConnected); 767 } 768 else 769 { 770 // We have a valid process 771 SetID (pid); 772 GetThreadList(); 773 if (m_gdb_comm.GetStopReply(m_last_stop_packet)) 774 { 775 776 // '?' Packets must be handled differently in non-stop mode 777 if (GetTarget().GetNonStopModeEnabled()) 778 HandleStopReplySequence(); 779 780 if (!m_target.GetArchitecture().IsValid()) 781 { 782 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 783 { 784 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 785 } 786 else 787 { 788 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 789 } 790 } 791 792 const StateType state = SetThreadStopInfo (m_last_stop_packet); 793 if (state == eStateStopped) 794 { 795 SetPrivateState (state); 796 } 797 else 798 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 799 } 800 else 801 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 802 } 803 804 if (log) 805 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalizing target architecture initial triple: %s (GetTarget().GetArchitecture().IsValid() %s, m_gdb_comm.GetHostArchitecture().IsValid(): %s)", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str (), GetTarget ().GetArchitecture ().IsValid () ? "true" : "false", m_gdb_comm.GetHostArchitecture ().IsValid () ? "true" : "false"); 806 807 808 if (error.Success() 809 && !GetTarget().GetArchitecture().IsValid() 810 && m_gdb_comm.GetHostArchitecture().IsValid()) 811 { 812 // Prefer the *process'* architecture over that of the *host*, if available. 813 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 814 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 815 else 816 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 817 } 818 819 if (log) 820 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalized target architecture triple: %s", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str ()); 821 822 // Set the Unix signals properly for the target. 823 // FIXME Add a gdb-remote packet to discover dynamically. 824 if (error.Success ()) 825 { 826 const ArchSpec arch_spec = m_gdb_comm.GetHostArchitecture(); 827 if (arch_spec.IsValid ()) 828 { 829 if (log) 830 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": determining unix signals type based on architecture %s, triple %s", __FUNCTION__, GetID (), arch_spec.GetArchitectureName () ? arch_spec.GetArchitectureName () : "<null>", arch_spec.GetTriple ().getTriple ().c_str ()); 831 832 switch (arch_spec.GetTriple ().getOS ()) 833 { 834 case llvm::Triple::Linux: 835 if (arch_spec.GetTriple ().getArch () == llvm::Triple::mips64 || arch_spec.GetTriple ().getArch () == llvm::Triple::mips64el) 836 SetUnixSignals (UnixSignalsSP (new process_linux::MipsLinuxSignals ())); 837 else 838 SetUnixSignals (UnixSignalsSP (new process_linux::LinuxSignals ())); 839 if (log) 840 log->Printf ("ProcessGDBRemote::%s using Linux unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); 841 break; 842 case llvm::Triple::OpenBSD: 843 case llvm::Triple::FreeBSD: 844 case llvm::Triple::NetBSD: 845 SetUnixSignals (UnixSignalsSP (new FreeBSDSignals ())); 846 if (log) 847 log->Printf ("ProcessGDBRemote::%s using *BSD unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); 848 break; 849 default: 850 SetUnixSignals (UnixSignalsSP (new UnixSignals ())); 851 if (log) 852 log->Printf ("ProcessGDBRemote::%s using generic unix signals type for pid %" PRIu64, __FUNCTION__, GetID ()); 853 break; 854 } 855 } 856 } 857 858 return error; 859 } 860 861 Error 862 ProcessGDBRemote::WillLaunchOrAttach () 863 { 864 Error error; 865 m_stdio_communication.Clear (); 866 return error; 867 } 868 869 //---------------------------------------------------------------------- 870 // Process Control 871 //---------------------------------------------------------------------- 872 Error 873 ProcessGDBRemote::DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) 874 { 875 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 876 Error error; 877 878 if (log) 879 log->Printf ("ProcessGDBRemote::%s() entered", __FUNCTION__); 880 881 uint32_t launch_flags = launch_info.GetFlags().Get(); 882 const char *stdin_path = NULL; 883 const char *stdout_path = NULL; 884 const char *stderr_path = NULL; 885 const char *working_dir = launch_info.GetWorkingDirectory(); 886 887 const FileAction *file_action; 888 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 889 if (file_action) 890 { 891 if (file_action->GetAction() == FileAction::eFileActionOpen) 892 stdin_path = file_action->GetPath(); 893 } 894 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 895 if (file_action) 896 { 897 if (file_action->GetAction() == FileAction::eFileActionOpen) 898 stdout_path = file_action->GetPath(); 899 } 900 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 901 if (file_action) 902 { 903 if (file_action->GetAction() == FileAction::eFileActionOpen) 904 stderr_path = file_action->GetPath(); 905 } 906 907 if (log) 908 { 909 if (stdin_path || stdout_path || stderr_path) 910 log->Printf ("ProcessGDBRemote::%s provided with STDIO paths via launch_info: stdin=%s, stdout=%s, stderr=%s", 911 __FUNCTION__, 912 stdin_path ? stdin_path : "<null>", 913 stdout_path ? stdout_path : "<null>", 914 stderr_path ? stderr_path : "<null>"); 915 else 916 log->Printf ("ProcessGDBRemote::%s no STDIO paths given via launch_info", __FUNCTION__); 917 } 918 919 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 920 if (stdin_path || disable_stdio) 921 { 922 // the inferior will be reading stdin from the specified file 923 // or stdio is completely disabled 924 m_stdin_forward = false; 925 } 926 else 927 { 928 m_stdin_forward = true; 929 } 930 931 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 932 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 933 // ::LogSetLogFile ("/dev/stdout"); 934 935 ObjectFile * object_file = exe_module->GetObjectFile(); 936 if (object_file) 937 { 938 // Make sure we aren't already connected? 939 if (!m_gdb_comm.IsConnected()) 940 { 941 error = LaunchAndConnectToDebugserver (launch_info); 942 } 943 944 if (error.Success()) 945 { 946 lldb_utility::PseudoTerminal pty; 947 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 948 949 PlatformSP platform_sp (m_target.GetPlatform()); 950 if (disable_stdio) 951 { 952 // set to /dev/null unless redirected to a file above 953 if (!stdin_path) 954 stdin_path = "/dev/null"; 955 if (!stdout_path) 956 stdout_path = "/dev/null"; 957 if (!stderr_path) 958 stderr_path = "/dev/null"; 959 } 960 else if (platform_sp && platform_sp->IsHost()) 961 { 962 // If the debugserver is local and we aren't disabling STDIO, lets use 963 // a pseudo terminal to instead of relying on the 'O' packets for stdio 964 // since 'O' packets can really slow down debugging if the inferior 965 // does a lot of output. 966 const char *slave_name = NULL; 967 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 968 { 969 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 970 slave_name = pty.GetSlaveName (NULL, 0); 971 } 972 if (stdin_path == NULL) 973 stdin_path = slave_name; 974 975 if (stdout_path == NULL) 976 stdout_path = slave_name; 977 978 if (stderr_path == NULL) 979 stderr_path = slave_name; 980 981 if (log) 982 log->Printf ("ProcessGDBRemote::%s adjusted STDIO paths for local platform (IsHost() is true) using slave: stdin=%s, stdout=%s, stderr=%s", 983 __FUNCTION__, 984 stdin_path ? stdin_path : "<null>", 985 stdout_path ? stdout_path : "<null>", 986 stderr_path ? stderr_path : "<null>"); 987 } 988 989 if (log) 990 log->Printf ("ProcessGDBRemote::%s final STDIO paths after all adjustments: stdin=%s, stdout=%s, stderr=%s", 991 __FUNCTION__, 992 stdin_path ? stdin_path : "<null>", 993 stdout_path ? stdout_path : "<null>", 994 stderr_path ? stderr_path : "<null>"); 995 996 if (stdin_path) 997 m_gdb_comm.SetSTDIN (stdin_path); 998 if (stdout_path) 999 m_gdb_comm.SetSTDOUT (stdout_path); 1000 if (stderr_path) 1001 m_gdb_comm.SetSTDERR (stderr_path); 1002 1003 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 1004 m_gdb_comm.SetDetachOnError (launch_flags & eLaunchFlagDetachOnError); 1005 1006 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 1007 1008 const char * launch_event_data = launch_info.GetLaunchEventData(); 1009 if (launch_event_data != NULL && *launch_event_data != '\0') 1010 m_gdb_comm.SendLaunchEventDataPacket (launch_event_data); 1011 1012 if (working_dir && working_dir[0]) 1013 { 1014 m_gdb_comm.SetWorkingDir (working_dir); 1015 } 1016 1017 // Send the environment and the program + arguments after we connect 1018 const Args &environment = launch_info.GetEnvironmentEntries(); 1019 if (environment.GetArgumentCount()) 1020 { 1021 size_t num_environment_entries = environment.GetArgumentCount(); 1022 for (size_t i=0; i<num_environment_entries; ++i) 1023 { 1024 const char *env_entry = environment.GetArgumentAtIndex(i); 1025 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 1026 break; 1027 } 1028 } 1029 1030 { 1031 // Scope for the scoped timeout object 1032 GDBRemoteCommunication::ScopedTimeout timeout (m_gdb_comm, 10); 1033 1034 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info); 1035 if (arg_packet_err == 0) 1036 { 1037 std::string error_str; 1038 if (m_gdb_comm.GetLaunchSuccess (error_str)) 1039 { 1040 SetID (m_gdb_comm.GetCurrentProcessID ()); 1041 } 1042 else 1043 { 1044 error.SetErrorString (error_str.c_str()); 1045 } 1046 } 1047 else 1048 { 1049 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 1050 } 1051 } 1052 1053 if (GetID() == LLDB_INVALID_PROCESS_ID) 1054 { 1055 if (log) 1056 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 1057 KillDebugserverProcess (); 1058 return error; 1059 } 1060 1061 if (m_gdb_comm.GetStopReply(m_last_stop_packet)) 1062 { 1063 1064 // '?' Packets must be handled differently in non-stop mode 1065 if (GetTarget().GetNonStopModeEnabled()) 1066 HandleStopReplySequence(); 1067 1068 const ArchSpec &process_arch = m_gdb_comm.GetProcessArchitecture(); 1069 1070 if (process_arch.IsValid()) 1071 { 1072 m_target.MergeArchitecture(process_arch); 1073 } 1074 else 1075 { 1076 const ArchSpec &host_arch = m_gdb_comm.GetHostArchitecture(); 1077 if (host_arch.IsValid()) 1078 m_target.MergeArchitecture(host_arch); 1079 } 1080 1081 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 1082 1083 if (!disable_stdio) 1084 { 1085 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 1086 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 1087 } 1088 } 1089 } 1090 else 1091 { 1092 if (log) 1093 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 1094 } 1095 } 1096 else 1097 { 1098 // Set our user ID to an invalid process ID. 1099 SetID(LLDB_INVALID_PROCESS_ID); 1100 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 1101 exe_module->GetFileSpec().GetFilename().AsCString(), 1102 exe_module->GetArchitecture().GetArchitectureName()); 1103 } 1104 return error; 1105 1106 } 1107 1108 1109 Error 1110 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 1111 { 1112 Error error; 1113 // Only connect if we have a valid connect URL 1114 Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1115 1116 if (connect_url && connect_url[0]) 1117 { 1118 if (log) 1119 log->Printf("ProcessGDBRemote::%s Connecting to %s", __FUNCTION__, connect_url); 1120 std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 1121 if (conn_ap.get()) 1122 { 1123 const uint32_t max_retry_count = 50; 1124 uint32_t retry_count = 0; 1125 while (!m_gdb_comm.IsConnected()) 1126 { 1127 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 1128 { 1129 m_gdb_comm.SetConnection (conn_ap.release()); 1130 break; 1131 } 1132 else if (error.WasInterrupted()) 1133 { 1134 // If we were interrupted, don't keep retrying. 1135 break; 1136 } 1137 1138 retry_count++; 1139 1140 if (retry_count >= max_retry_count) 1141 break; 1142 1143 usleep (100000); 1144 } 1145 } 1146 } 1147 1148 if (!m_gdb_comm.IsConnected()) 1149 { 1150 if (error.Success()) 1151 error.SetErrorString("not connected to remote gdb server"); 1152 return error; 1153 } 1154 1155 // We always seem to be able to open a connection to a local port 1156 // so we need to make sure we can then send data to it. If we can't 1157 // then we aren't actually connected to anything, so try and do the 1158 // handshake with the remote GDB server and make sure that goes 1159 // alright. 1160 if (!m_gdb_comm.HandshakeWithServer (&error)) 1161 { 1162 m_gdb_comm.Disconnect(); 1163 if (error.Success()) 1164 error.SetErrorString("not connected to remote gdb server"); 1165 return error; 1166 } 1167 1168 // Send $QNonStop:1 packet on startup if required 1169 if (GetTarget().GetNonStopModeEnabled()) 1170 m_gdb_comm.SetNonStopMode(true); 1171 1172 m_gdb_comm.GetThreadSuffixSupported (); 1173 m_gdb_comm.GetListThreadsInStopReplySupported (); 1174 m_gdb_comm.GetHostInfo (); 1175 m_gdb_comm.GetVContSupported ('c'); 1176 m_gdb_comm.GetVAttachOrWaitSupported(); 1177 1178 // Ask the remote server for the default thread id 1179 if (GetTarget().GetNonStopModeEnabled()) 1180 m_gdb_comm.GetDefaultThreadId(m_initial_tid); 1181 1182 1183 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 1184 for (size_t idx = 0; idx < num_cmds; idx++) 1185 { 1186 StringExtractorGDBRemote response; 1187 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 1188 } 1189 return error; 1190 } 1191 1192 void 1193 ProcessGDBRemote::DidLaunchOrAttach (ArchSpec& process_arch) 1194 { 1195 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1196 if (log) 1197 log->Printf ("ProcessGDBRemote::DidLaunch()"); 1198 if (GetID() != LLDB_INVALID_PROCESS_ID) 1199 { 1200 BuildDynamicRegisterInfo (false); 1201 1202 // See if the GDB server supports the qHostInfo information 1203 1204 1205 // See if the GDB server supports the qProcessInfo packet, if so 1206 // prefer that over the Host information as it will be more specific 1207 // to our process. 1208 1209 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 1210 if (remote_process_arch.IsValid()) 1211 { 1212 process_arch = remote_process_arch; 1213 if (log) 1214 log->Printf ("ProcessGDBRemote::%s gdb-remote had process architecture, using %s %s", 1215 __FUNCTION__, 1216 process_arch.GetArchitectureName () ? process_arch.GetArchitectureName () : "<null>", 1217 process_arch.GetTriple().getTriple ().c_str() ? process_arch.GetTriple().getTriple ().c_str() : "<null>"); 1218 } 1219 else 1220 { 1221 process_arch = m_gdb_comm.GetHostArchitecture(); 1222 if (log) 1223 log->Printf ("ProcessGDBRemote::%s gdb-remote did not have process architecture, using gdb-remote host architecture %s %s", 1224 __FUNCTION__, 1225 process_arch.GetArchitectureName () ? process_arch.GetArchitectureName () : "<null>", 1226 process_arch.GetTriple().getTriple ().c_str() ? process_arch.GetTriple().getTriple ().c_str() : "<null>"); 1227 } 1228 1229 if (process_arch.IsValid()) 1230 { 1231 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 1232 if (target_arch.IsValid()) 1233 { 1234 if (log) 1235 log->Printf ("ProcessGDBRemote::%s analyzing target arch, currently %s %s", 1236 __FUNCTION__, 1237 target_arch.GetArchitectureName () ? target_arch.GetArchitectureName () : "<null>", 1238 target_arch.GetTriple().getTriple ().c_str() ? target_arch.GetTriple().getTriple ().c_str() : "<null>"); 1239 1240 // If the remote host is ARM and we have apple as the vendor, then 1241 // ARM executables and shared libraries can have mixed ARM architectures. 1242 // You can have an armv6 executable, and if the host is armv7, then the 1243 // system will load the best possible architecture for all shared libraries 1244 // it has, so we really need to take the remote host architecture as our 1245 // defacto architecture in this case. 1246 1247 if (process_arch.GetMachine() == llvm::Triple::arm && 1248 process_arch.GetTriple().getVendor() == llvm::Triple::Apple) 1249 { 1250 GetTarget().SetArchitecture (process_arch); 1251 if (log) 1252 log->Printf ("ProcessGDBRemote::%s remote process is ARM/Apple, setting target arch to %s %s", 1253 __FUNCTION__, 1254 process_arch.GetArchitectureName () ? process_arch.GetArchitectureName () : "<null>", 1255 process_arch.GetTriple().getTriple ().c_str() ? process_arch.GetTriple().getTriple ().c_str() : "<null>"); 1256 } 1257 else 1258 { 1259 // Fill in what is missing in the triple 1260 const llvm::Triple &remote_triple = process_arch.GetTriple(); 1261 llvm::Triple new_target_triple = target_arch.GetTriple(); 1262 if (new_target_triple.getVendorName().size() == 0) 1263 { 1264 new_target_triple.setVendor (remote_triple.getVendor()); 1265 1266 if (new_target_triple.getOSName().size() == 0) 1267 { 1268 new_target_triple.setOS (remote_triple.getOS()); 1269 1270 if (new_target_triple.getEnvironmentName().size() == 0) 1271 new_target_triple.setEnvironment (remote_triple.getEnvironment()); 1272 } 1273 1274 ArchSpec new_target_arch = target_arch; 1275 new_target_arch.SetTriple(new_target_triple); 1276 GetTarget().SetArchitecture(new_target_arch); 1277 } 1278 } 1279 1280 if (log) 1281 log->Printf ("ProcessGDBRemote::%s final target arch after adjustments for remote architecture: %s %s", 1282 __FUNCTION__, 1283 target_arch.GetArchitectureName () ? target_arch.GetArchitectureName () : "<null>", 1284 target_arch.GetTriple().getTriple ().c_str() ? target_arch.GetTriple().getTriple ().c_str() : "<null>"); 1285 } 1286 else 1287 { 1288 // The target doesn't have a valid architecture yet, set it from 1289 // the architecture we got from the remote GDB server 1290 GetTarget().SetArchitecture (process_arch); 1291 } 1292 } 1293 } 1294 } 1295 1296 void 1297 ProcessGDBRemote::DidLaunch () 1298 { 1299 ArchSpec process_arch; 1300 DidLaunchOrAttach (process_arch); 1301 } 1302 1303 Error 1304 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 1305 { 1306 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1307 Error error; 1308 1309 if (log) 1310 log->Printf ("ProcessGDBRemote::%s()", __FUNCTION__); 1311 1312 // Clear out and clean up from any current state 1313 Clear(); 1314 if (attach_pid != LLDB_INVALID_PROCESS_ID) 1315 { 1316 // Make sure we aren't already connected? 1317 if (!m_gdb_comm.IsConnected()) 1318 { 1319 error = LaunchAndConnectToDebugserver (attach_info); 1320 1321 if (error.Fail()) 1322 { 1323 const char *error_string = error.AsCString(); 1324 if (error_string == NULL) 1325 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1326 1327 SetExitStatus (-1, error_string); 1328 } 1329 } 1330 1331 if (error.Success()) 1332 { 1333 m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); 1334 1335 char packet[64]; 1336 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 1337 SetID (attach_pid); 1338 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 1339 } 1340 } 1341 1342 return error; 1343 } 1344 1345 Error 1346 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, const ProcessAttachInfo &attach_info) 1347 { 1348 Error error; 1349 // Clear out and clean up from any current state 1350 Clear(); 1351 1352 if (process_name && process_name[0]) 1353 { 1354 // Make sure we aren't already connected? 1355 if (!m_gdb_comm.IsConnected()) 1356 { 1357 error = LaunchAndConnectToDebugserver (attach_info); 1358 1359 if (error.Fail()) 1360 { 1361 const char *error_string = error.AsCString(); 1362 if (error_string == NULL) 1363 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1364 1365 SetExitStatus (-1, error_string); 1366 } 1367 } 1368 1369 if (error.Success()) 1370 { 1371 StreamString packet; 1372 1373 m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); 1374 1375 if (attach_info.GetWaitForLaunch()) 1376 { 1377 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1378 { 1379 packet.PutCString ("vAttachWait"); 1380 } 1381 else 1382 { 1383 if (attach_info.GetIgnoreExisting()) 1384 packet.PutCString("vAttachWait"); 1385 else 1386 packet.PutCString ("vAttachOrWait"); 1387 } 1388 } 1389 else 1390 packet.PutCString("vAttachName"); 1391 packet.PutChar(';'); 1392 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1393 1394 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1395 1396 } 1397 } 1398 return error; 1399 } 1400 1401 1402 bool 1403 ProcessGDBRemote::SetExitStatus (int exit_status, const char *cstr) 1404 { 1405 m_gdb_comm.Disconnect(); 1406 return Process::SetExitStatus (exit_status, cstr); 1407 } 1408 1409 void 1410 ProcessGDBRemote::DidAttach (ArchSpec &process_arch) 1411 { 1412 // If you can figure out what the architecture is, fill it in here. 1413 process_arch.Clear(); 1414 DidLaunchOrAttach (process_arch); 1415 } 1416 1417 1418 Error 1419 ProcessGDBRemote::WillResume () 1420 { 1421 m_continue_c_tids.clear(); 1422 m_continue_C_tids.clear(); 1423 m_continue_s_tids.clear(); 1424 m_continue_S_tids.clear(); 1425 return Error(); 1426 } 1427 1428 Error 1429 ProcessGDBRemote::DoResume () 1430 { 1431 Error error; 1432 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1433 if (log) 1434 log->Printf ("ProcessGDBRemote::Resume()"); 1435 1436 Listener listener ("gdb-remote.resume-packet-sent"); 1437 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1438 { 1439 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1440 1441 const size_t num_threads = GetThreadList().GetSize(); 1442 1443 StreamString continue_packet; 1444 bool continue_packet_error = false; 1445 if (m_gdb_comm.HasAnyVContSupport ()) 1446 { 1447 if (!GetTarget().GetNonStopModeEnabled() && 1448 (m_continue_c_tids.size() == num_threads || 1449 (m_continue_c_tids.empty() && 1450 m_continue_C_tids.empty() && 1451 m_continue_s_tids.empty() && 1452 m_continue_S_tids.empty()))) 1453 { 1454 // All threads are continuing, just send a "c" packet 1455 continue_packet.PutCString ("c"); 1456 } 1457 else 1458 { 1459 continue_packet.PutCString ("vCont"); 1460 1461 if (!m_continue_c_tids.empty()) 1462 { 1463 if (m_gdb_comm.GetVContSupported ('c')) 1464 { 1465 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) 1466 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1467 } 1468 else 1469 continue_packet_error = true; 1470 } 1471 1472 if (!continue_packet_error && !m_continue_C_tids.empty()) 1473 { 1474 if (m_gdb_comm.GetVContSupported ('C')) 1475 { 1476 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) 1477 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1478 } 1479 else 1480 continue_packet_error = true; 1481 } 1482 1483 if (!continue_packet_error && !m_continue_s_tids.empty()) 1484 { 1485 if (m_gdb_comm.GetVContSupported ('s')) 1486 { 1487 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) 1488 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1489 } 1490 else 1491 continue_packet_error = true; 1492 } 1493 1494 if (!continue_packet_error && !m_continue_S_tids.empty()) 1495 { 1496 if (m_gdb_comm.GetVContSupported ('S')) 1497 { 1498 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) 1499 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1500 } 1501 else 1502 continue_packet_error = true; 1503 } 1504 1505 if (continue_packet_error) 1506 continue_packet.GetString().clear(); 1507 } 1508 } 1509 else 1510 continue_packet_error = true; 1511 1512 if (continue_packet_error) 1513 { 1514 // Either no vCont support, or we tried to use part of the vCont 1515 // packet that wasn't supported by the remote GDB server. 1516 // We need to try and make a simple packet that can do our continue 1517 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1518 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1519 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1520 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1521 if (num_continue_c_tids > 0) 1522 { 1523 if (num_continue_c_tids == num_threads) 1524 { 1525 // All threads are resuming... 1526 m_gdb_comm.SetCurrentThreadForRun (-1); 1527 continue_packet.PutChar ('c'); 1528 continue_packet_error = false; 1529 } 1530 else if (num_continue_c_tids == 1 && 1531 num_continue_C_tids == 0 && 1532 num_continue_s_tids == 0 && 1533 num_continue_S_tids == 0 ) 1534 { 1535 // Only one thread is continuing 1536 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1537 continue_packet.PutChar ('c'); 1538 continue_packet_error = false; 1539 } 1540 } 1541 1542 if (continue_packet_error && num_continue_C_tids > 0) 1543 { 1544 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1545 num_continue_C_tids > 0 && 1546 num_continue_s_tids == 0 && 1547 num_continue_S_tids == 0 ) 1548 { 1549 const int continue_signo = m_continue_C_tids.front().second; 1550 // Only one thread is continuing 1551 if (num_continue_C_tids > 1) 1552 { 1553 // More that one thread with a signal, yet we don't have 1554 // vCont support and we are being asked to resume each 1555 // thread with a signal, we need to make sure they are 1556 // all the same signal, or we can't issue the continue 1557 // accurately with the current support... 1558 if (num_continue_C_tids > 1) 1559 { 1560 continue_packet_error = false; 1561 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1562 { 1563 if (m_continue_C_tids[i].second != continue_signo) 1564 continue_packet_error = true; 1565 } 1566 } 1567 if (!continue_packet_error) 1568 m_gdb_comm.SetCurrentThreadForRun (-1); 1569 } 1570 else 1571 { 1572 // Set the continue thread ID 1573 continue_packet_error = false; 1574 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1575 } 1576 if (!continue_packet_error) 1577 { 1578 // Add threads continuing with the same signo... 1579 continue_packet.Printf("C%2.2x", continue_signo); 1580 } 1581 } 1582 } 1583 1584 if (continue_packet_error && num_continue_s_tids > 0) 1585 { 1586 if (num_continue_s_tids == num_threads) 1587 { 1588 // All threads are resuming... 1589 m_gdb_comm.SetCurrentThreadForRun (-1); 1590 continue_packet.PutChar ('s'); 1591 continue_packet_error = false; 1592 } 1593 else if (num_continue_c_tids == 0 && 1594 num_continue_C_tids == 0 && 1595 num_continue_s_tids == 1 && 1596 num_continue_S_tids == 0 ) 1597 { 1598 // Only one thread is stepping 1599 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1600 continue_packet.PutChar ('s'); 1601 continue_packet_error = false; 1602 } 1603 } 1604 1605 if (!continue_packet_error && num_continue_S_tids > 0) 1606 { 1607 if (num_continue_S_tids == num_threads) 1608 { 1609 const int step_signo = m_continue_S_tids.front().second; 1610 // Are all threads trying to step with the same signal? 1611 continue_packet_error = false; 1612 if (num_continue_S_tids > 1) 1613 { 1614 for (size_t i=1; i<num_threads; ++i) 1615 { 1616 if (m_continue_S_tids[i].second != step_signo) 1617 continue_packet_error = true; 1618 } 1619 } 1620 if (!continue_packet_error) 1621 { 1622 // Add threads stepping with the same signo... 1623 m_gdb_comm.SetCurrentThreadForRun (-1); 1624 continue_packet.Printf("S%2.2x", step_signo); 1625 } 1626 } 1627 else if (num_continue_c_tids == 0 && 1628 num_continue_C_tids == 0 && 1629 num_continue_s_tids == 0 && 1630 num_continue_S_tids == 1 ) 1631 { 1632 // Only one thread is stepping with signal 1633 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1634 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1635 continue_packet_error = false; 1636 } 1637 } 1638 } 1639 1640 if (continue_packet_error) 1641 { 1642 error.SetErrorString ("can't make continue packet for this resume"); 1643 } 1644 else 1645 { 1646 EventSP event_sp; 1647 TimeValue timeout; 1648 timeout = TimeValue::Now(); 1649 timeout.OffsetWithSeconds (5); 1650 if (!m_async_thread.IsJoinable()) 1651 { 1652 error.SetErrorString ("Trying to resume but the async thread is dead."); 1653 if (log) 1654 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1655 return error; 1656 } 1657 1658 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1659 1660 if (listener.WaitForEvent (&timeout, event_sp) == false) 1661 { 1662 error.SetErrorString("Resume timed out."); 1663 if (log) 1664 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1665 } 1666 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1667 { 1668 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1669 if (log) 1670 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1671 return error; 1672 } 1673 } 1674 } 1675 1676 return error; 1677 } 1678 1679 void 1680 ProcessGDBRemote::HandleStopReplySequence () 1681 { 1682 while(true) 1683 { 1684 // Send vStopped 1685 StringExtractorGDBRemote response; 1686 m_gdb_comm.SendPacketAndWaitForResponse("vStopped", response, false); 1687 1688 // OK represents end of signal list 1689 if (response.IsOKResponse()) 1690 break; 1691 1692 // If not OK or a normal packet we have a problem 1693 if (!response.IsNormalResponse()) 1694 break; 1695 1696 SetLastStopPacket(response); 1697 } 1698 } 1699 1700 void 1701 ProcessGDBRemote::ClearThreadIDList () 1702 { 1703 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1704 m_thread_ids.clear(); 1705 } 1706 1707 bool 1708 ProcessGDBRemote::UpdateThreadIDList () 1709 { 1710 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1711 bool sequence_mutex_unavailable = false; 1712 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1713 if (sequence_mutex_unavailable) 1714 { 1715 return false; // We just didn't get the list 1716 } 1717 return true; 1718 } 1719 1720 bool 1721 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1722 { 1723 // locker will keep a mutex locked until it goes out of scope 1724 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1725 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1726 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1727 1728 size_t num_thread_ids = m_thread_ids.size(); 1729 // The "m_thread_ids" thread ID list should always be updated after each stop 1730 // reply packet, but in case it isn't, update it here. 1731 if (num_thread_ids == 0) 1732 { 1733 if (!UpdateThreadIDList ()) 1734 return false; 1735 num_thread_ids = m_thread_ids.size(); 1736 } 1737 1738 ThreadList old_thread_list_copy(old_thread_list); 1739 if (num_thread_ids > 0) 1740 { 1741 for (size_t i=0; i<num_thread_ids; ++i) 1742 { 1743 tid_t tid = m_thread_ids[i]; 1744 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1745 if (!thread_sp) 1746 { 1747 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1748 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1749 log->Printf( 1750 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1751 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1752 thread_sp->GetID()); 1753 } 1754 else 1755 { 1756 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1757 log->Printf( 1758 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1759 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1760 thread_sp->GetID()); 1761 } 1762 new_thread_list.AddThread(thread_sp); 1763 } 1764 } 1765 1766 // Whatever that is left in old_thread_list_copy are not 1767 // present in new_thread_list. Remove non-existent threads from internal id table. 1768 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1769 for (size_t i=0; i<old_num_thread_ids; i++) 1770 { 1771 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1772 if (old_thread_sp) 1773 { 1774 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1775 m_thread_id_to_index_id_map.erase(old_thread_id); 1776 } 1777 } 1778 1779 return true; 1780 } 1781 1782 1783 StateType 1784 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1785 { 1786 stop_packet.SetFilePos (0); 1787 const char stop_type = stop_packet.GetChar(); 1788 switch (stop_type) 1789 { 1790 case 'T': 1791 case 'S': 1792 { 1793 // This is a bit of a hack, but is is required. If we did exec, we 1794 // need to clear our thread lists and also know to rebuild our dynamic 1795 // register info before we lookup and threads and populate the expedited 1796 // register values so we need to know this right away so we can cleanup 1797 // and update our registers. 1798 const uint32_t stop_id = GetStopID(); 1799 if (stop_id == 0) 1800 { 1801 // Our first stop, make sure we have a process ID, and also make 1802 // sure we know about our registers 1803 if (GetID() == LLDB_INVALID_PROCESS_ID) 1804 { 1805 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1806 if (pid != LLDB_INVALID_PROCESS_ID) 1807 SetID (pid); 1808 } 1809 BuildDynamicRegisterInfo (true); 1810 } 1811 // Stop with signal and thread info 1812 const uint8_t signo = stop_packet.GetHexU8(); 1813 std::string name; 1814 std::string value; 1815 std::string thread_name; 1816 std::string reason; 1817 std::string description; 1818 uint32_t exc_type = 0; 1819 std::vector<addr_t> exc_data; 1820 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1821 ThreadSP thread_sp; 1822 ThreadGDBRemote *gdb_thread = NULL; 1823 1824 while (stop_packet.GetNameColonValue(name, value)) 1825 { 1826 if (name.compare("metype") == 0) 1827 { 1828 // exception type in big endian hex 1829 exc_type = StringConvert::ToUInt32 (value.c_str(), 0, 16); 1830 } 1831 else if (name.compare("medata") == 0) 1832 { 1833 // exception data in big endian hex 1834 exc_data.push_back(StringConvert::ToUInt64 (value.c_str(), 0, 16)); 1835 } 1836 else if (name.compare("thread") == 0) 1837 { 1838 // thread in big endian hex 1839 lldb::tid_t tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1840 // m_thread_list_real does have its own mutex, but we need to 1841 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1842 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1843 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1844 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1845 1846 if (!thread_sp) 1847 { 1848 // Create the thread if we need to 1849 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1850 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1851 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1852 log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1853 __FUNCTION__, 1854 static_cast<void*>(thread_sp.get()), 1855 thread_sp->GetID()); 1856 1857 m_thread_list_real.AddThread(thread_sp); 1858 } 1859 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1860 1861 } 1862 else if (name.compare("threads") == 0) 1863 { 1864 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1865 m_thread_ids.clear(); 1866 // A comma separated list of all threads in the current 1867 // process that includes the thread for this stop reply 1868 // packet 1869 size_t comma_pos; 1870 lldb::tid_t tid; 1871 while ((comma_pos = value.find(',')) != std::string::npos) 1872 { 1873 value[comma_pos] = '\0'; 1874 // thread in big endian hex 1875 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1876 if (tid != LLDB_INVALID_THREAD_ID) 1877 m_thread_ids.push_back (tid); 1878 value.erase(0, comma_pos + 1); 1879 } 1880 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1881 if (tid != LLDB_INVALID_THREAD_ID) 1882 m_thread_ids.push_back (tid); 1883 } 1884 else if (name.compare("hexname") == 0) 1885 { 1886 StringExtractor name_extractor; 1887 // Swap "value" over into "name_extractor" 1888 name_extractor.GetStringRef().swap(value); 1889 // Now convert the HEX bytes into a string value 1890 name_extractor.GetHexByteString (value); 1891 thread_name.swap (value); 1892 } 1893 else if (name.compare("name") == 0) 1894 { 1895 thread_name.swap (value); 1896 } 1897 else if (name.compare("qaddr") == 0) 1898 { 1899 thread_dispatch_qaddr = StringConvert::ToUInt64 (value.c_str(), 0, 16); 1900 } 1901 else if (name.compare("reason") == 0) 1902 { 1903 reason.swap(value); 1904 } 1905 else if (name.compare("description") == 0) 1906 { 1907 StringExtractor desc_extractor; 1908 // Swap "value" over into "name_extractor" 1909 desc_extractor.GetStringRef().swap(value); 1910 // Now convert the HEX bytes into a string value 1911 desc_extractor.GetHexByteString (value); 1912 description.swap(value); 1913 } 1914 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1915 { 1916 // We have a register number that contains an expedited 1917 // register value. Lets supply this register to our thread 1918 // so it won't have to go and read it. 1919 if (gdb_thread) 1920 { 1921 uint32_t reg = StringConvert::ToUInt32 (name.c_str(), UINT32_MAX, 16); 1922 1923 if (reg != UINT32_MAX) 1924 { 1925 StringExtractor reg_value_extractor; 1926 // Swap "value" over into "reg_value_extractor" 1927 reg_value_extractor.GetStringRef().swap(value); 1928 if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) 1929 { 1930 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1931 name.c_str(), 1932 reg, 1933 reg, 1934 reg_value_extractor.GetStringRef().c_str(), 1935 stop_packet.GetStringRef().c_str()); 1936 } 1937 } 1938 } 1939 } 1940 } 1941 1942 // If the response is old style 'S' packet which does not provide us with thread information 1943 // then update the thread list and choose the first one. 1944 if (!thread_sp) 1945 { 1946 UpdateThreadIDList (); 1947 1948 if (!m_thread_ids.empty ()) 1949 { 1950 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1951 thread_sp = m_thread_list_real.FindThreadByProtocolID (m_thread_ids.front (), false); 1952 if (thread_sp) 1953 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get ()); 1954 } 1955 } 1956 1957 if (thread_sp) 1958 { 1959 // Clear the stop info just in case we don't set it to anything 1960 thread_sp->SetStopInfo (StopInfoSP()); 1961 1962 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1963 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1964 if (exc_type != 0) 1965 { 1966 const size_t exc_data_size = exc_data.size(); 1967 1968 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1969 exc_type, 1970 exc_data_size, 1971 exc_data_size >= 1 ? exc_data[0] : 0, 1972 exc_data_size >= 2 ? exc_data[1] : 0, 1973 exc_data_size >= 3 ? exc_data[2] : 0)); 1974 } 1975 else 1976 { 1977 bool handled = false; 1978 bool did_exec = false; 1979 if (!reason.empty()) 1980 { 1981 if (reason.compare("trace") == 0) 1982 { 1983 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1984 handled = true; 1985 } 1986 else if (reason.compare("breakpoint") == 0) 1987 { 1988 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1989 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1990 if (bp_site_sp) 1991 { 1992 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1993 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1994 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1995 handled = true; 1996 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1997 { 1998 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1999 } 2000 else 2001 { 2002 StopInfoSP invalid_stop_info_sp; 2003 thread_sp->SetStopInfo (invalid_stop_info_sp); 2004 } 2005 } 2006 } 2007 else if (reason.compare("trap") == 0) 2008 { 2009 // Let the trap just use the standard signal stop reason below... 2010 } 2011 else if (reason.compare("watchpoint") == 0) 2012 { 2013 StringExtractor desc_extractor(description.c_str()); 2014 addr_t wp_addr = desc_extractor.GetU64(LLDB_INVALID_ADDRESS); 2015 uint32_t wp_index = desc_extractor.GetU32(LLDB_INVALID_INDEX32); 2016 watch_id_t watch_id = LLDB_INVALID_WATCH_ID; 2017 if (wp_addr != LLDB_INVALID_ADDRESS) 2018 { 2019 WatchpointSP wp_sp = GetTarget().GetWatchpointList().FindByAddress(wp_addr); 2020 if (wp_sp) 2021 { 2022 wp_sp->SetHardwareIndex(wp_index); 2023 watch_id = wp_sp->GetID(); 2024 } 2025 } 2026 if (watch_id == LLDB_INVALID_WATCH_ID) 2027 { 2028 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_WATCHPOINTS)); 2029 if (log) log->Printf ("failed to find watchpoint"); 2030 } 2031 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 2032 handled = true; 2033 } 2034 else if (reason.compare("exception") == 0) 2035 { 2036 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 2037 handled = true; 2038 } 2039 else if (reason.compare("exec") == 0) 2040 { 2041 did_exec = true; 2042 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 2043 handled = true; 2044 } 2045 } 2046 2047 if (!handled && signo && did_exec == false) 2048 { 2049 if (signo == SIGTRAP) 2050 { 2051 // Currently we are going to assume SIGTRAP means we are either 2052 // hitting a breakpoint or hardware single stepping. 2053 handled = true; 2054 addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; 2055 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 2056 2057 if (bp_site_sp) 2058 { 2059 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 2060 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 2061 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 2062 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 2063 { 2064 if(m_breakpoint_pc_offset != 0) 2065 thread_sp->GetRegisterContext()->SetPC(pc); 2066 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 2067 } 2068 else 2069 { 2070 StopInfoSP invalid_stop_info_sp; 2071 thread_sp->SetStopInfo (invalid_stop_info_sp); 2072 } 2073 } 2074 else 2075 { 2076 // If we were stepping then assume the stop was the result of the trace. If we were 2077 // not stepping then report the SIGTRAP. 2078 // FIXME: We are still missing the case where we single step over a trap instruction. 2079 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 2080 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 2081 else 2082 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 2083 } 2084 } 2085 if (!handled) 2086 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 2087 } 2088 2089 if (!description.empty()) 2090 { 2091 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 2092 if (stop_info_sp) 2093 { 2094 const char *stop_info_desc = stop_info_sp->GetDescription(); 2095 if (!stop_info_desc || !stop_info_desc[0]) 2096 stop_info_sp->SetDescription (description.c_str()); 2097 } 2098 else 2099 { 2100 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 2101 } 2102 } 2103 } 2104 } 2105 return eStateStopped; 2106 } 2107 break; 2108 2109 case 'W': 2110 case 'X': 2111 // process exited 2112 return eStateExited; 2113 2114 default: 2115 break; 2116 } 2117 return eStateInvalid; 2118 } 2119 2120 void 2121 ProcessGDBRemote::RefreshStateAfterStop () 2122 { 2123 Mutex::Locker locker(m_thread_list_real.GetMutex()); 2124 m_thread_ids.clear(); 2125 // Set the thread stop info. It might have a "threads" key whose value is 2126 // a list of all thread IDs in the current process, so m_thread_ids might 2127 // get set. 2128 SetThreadStopInfo (m_last_stop_packet); 2129 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 2130 if (m_thread_ids.empty()) 2131 { 2132 // No, we need to fetch the thread list manually 2133 UpdateThreadIDList(); 2134 } 2135 2136 // If we have queried for a default thread id 2137 if (m_initial_tid != LLDB_INVALID_THREAD_ID) 2138 { 2139 m_thread_list.SetSelectedThreadByID(m_initial_tid); 2140 m_initial_tid = LLDB_INVALID_THREAD_ID; 2141 } 2142 2143 // Let all threads recover from stopping and do any clean up based 2144 // on the previous thread state (if any). 2145 m_thread_list_real.RefreshStateAfterStop(); 2146 2147 } 2148 2149 Error 2150 ProcessGDBRemote::DoHalt (bool &caused_stop) 2151 { 2152 Error error; 2153 2154 bool timed_out = false; 2155 Mutex::Locker locker; 2156 2157 if (m_public_state.GetValue() == eStateAttaching) 2158 { 2159 // We are being asked to halt during an attach. We need to just close 2160 // our file handle and debugserver will go away, and we can be done... 2161 m_gdb_comm.Disconnect(); 2162 } 2163 else 2164 { 2165 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 2166 { 2167 if (timed_out) 2168 error.SetErrorString("timed out sending interrupt packet"); 2169 else 2170 error.SetErrorString("unknown error sending interrupt packet"); 2171 } 2172 2173 caused_stop = m_gdb_comm.GetInterruptWasSent (); 2174 } 2175 return error; 2176 } 2177 2178 Error 2179 ProcessGDBRemote::DoDetach(bool keep_stopped) 2180 { 2181 Error error; 2182 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2183 if (log) 2184 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 2185 2186 error = m_gdb_comm.Detach (keep_stopped); 2187 if (log) 2188 { 2189 if (error.Success()) 2190 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 2191 else 2192 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 2193 } 2194 2195 if (!error.Success()) 2196 return error; 2197 2198 // Sleep for one second to let the process get all detached... 2199 StopAsyncThread (); 2200 2201 SetPrivateState (eStateDetached); 2202 ResumePrivateStateThread(); 2203 2204 //KillDebugserverProcess (); 2205 return error; 2206 } 2207 2208 2209 Error 2210 ProcessGDBRemote::DoDestroy () 2211 { 2212 Error error; 2213 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2214 if (log) 2215 log->Printf ("ProcessGDBRemote::DoDestroy()"); 2216 2217 // There is a bug in older iOS debugservers where they don't shut down the process 2218 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 2219 // this can cause problems with restarting. So we check to see if any of our threads are stopped 2220 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 2221 // destroy it again. 2222 // 2223 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 2224 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 2225 // the debugservers with this bug are equal. There really should be a better way to test this! 2226 // 2227 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 2228 // get called here to destroy again and we're still at a breakpoint or exception, then we should 2229 // just do the straight-forward kill. 2230 // 2231 // And of course, if we weren't able to stop the process by the time we get here, it isn't 2232 // necessary (or helpful) to do any of this. 2233 2234 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 2235 { 2236 PlatformSP platform_sp = GetTarget().GetPlatform(); 2237 2238 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 2239 if (platform_sp 2240 && platform_sp->GetName() 2241 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 2242 { 2243 if (m_destroy_tried_resuming) 2244 { 2245 if (log) 2246 log->PutCString ("ProcessGDBRemote::DoDestroy() - Tried resuming to destroy once already, not doing it again."); 2247 } 2248 else 2249 { 2250 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 2251 // but we really need it to happen here and it doesn't matter if we do it twice. 2252 m_thread_list.DiscardThreadPlans(); 2253 DisableAllBreakpointSites(); 2254 2255 bool stop_looks_like_crash = false; 2256 ThreadList &threads = GetThreadList(); 2257 2258 { 2259 Mutex::Locker locker(threads.GetMutex()); 2260 2261 size_t num_threads = threads.GetSize(); 2262 for (size_t i = 0; i < num_threads; i++) 2263 { 2264 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 2265 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 2266 StopReason reason = eStopReasonInvalid; 2267 if (stop_info_sp) 2268 reason = stop_info_sp->GetStopReason(); 2269 if (reason == eStopReasonBreakpoint 2270 || reason == eStopReasonException) 2271 { 2272 if (log) 2273 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 2274 thread_sp->GetProtocolID(), 2275 stop_info_sp->GetDescription()); 2276 stop_looks_like_crash = true; 2277 break; 2278 } 2279 } 2280 } 2281 2282 if (stop_looks_like_crash) 2283 { 2284 if (log) 2285 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 2286 m_destroy_tried_resuming = true; 2287 2288 // If we are going to run again before killing, it would be good to suspend all the threads 2289 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 2290 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 2291 // have to run the risk of letting those threads proceed a bit. 2292 2293 { 2294 Mutex::Locker locker(threads.GetMutex()); 2295 2296 size_t num_threads = threads.GetSize(); 2297 for (size_t i = 0; i < num_threads; i++) 2298 { 2299 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 2300 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 2301 StopReason reason = eStopReasonInvalid; 2302 if (stop_info_sp) 2303 reason = stop_info_sp->GetStopReason(); 2304 if (reason != eStopReasonBreakpoint 2305 && reason != eStopReasonException) 2306 { 2307 if (log) 2308 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 2309 thread_sp->GetProtocolID()); 2310 thread_sp->SetResumeState(eStateSuspended); 2311 } 2312 } 2313 } 2314 Resume (); 2315 return Destroy(false); 2316 } 2317 } 2318 } 2319 } 2320 2321 // Interrupt if our inferior is running... 2322 int exit_status = SIGABRT; 2323 std::string exit_string; 2324 2325 if (m_gdb_comm.IsConnected()) 2326 { 2327 if (m_public_state.GetValue() != eStateAttaching) 2328 { 2329 StringExtractorGDBRemote response; 2330 bool send_async = true; 2331 GDBRemoteCommunication::ScopedTimeout (m_gdb_comm, 3); 2332 2333 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) 2334 { 2335 char packet_cmd = response.GetChar(0); 2336 2337 if (packet_cmd == 'W' || packet_cmd == 'X') 2338 { 2339 #if defined(__APPLE__) 2340 // For Native processes on Mac OS X, we launch through the Host Platform, then hand the process off 2341 // to debugserver, which becomes the parent process through "PT_ATTACH". Then when we go to kill 2342 // the process on Mac OS X we call ptrace(PT_KILL) to kill it, then we call waitpid which returns 2343 // with no error and the correct status. But amusingly enough that doesn't seem to actually reap 2344 // the process, but instead it is left around as a Zombie. Probably the kernel is in the process of 2345 // switching ownership back to lldb which was the original parent, and gets confused in the handoff. 2346 // Anyway, so call waitpid here to finally reap it. 2347 PlatformSP platform_sp(GetTarget().GetPlatform()); 2348 if (platform_sp && platform_sp->IsHost()) 2349 { 2350 int status; 2351 ::pid_t reap_pid; 2352 reap_pid = waitpid (GetID(), &status, WNOHANG); 2353 if (log) 2354 log->Printf ("Reaped pid: %d, status: %d.\n", reap_pid, status); 2355 } 2356 #endif 2357 SetLastStopPacket (response); 2358 ClearThreadIDList (); 2359 exit_status = response.GetHexU8(); 2360 } 2361 else 2362 { 2363 if (log) 2364 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2365 exit_string.assign("got unexpected response to k packet: "); 2366 exit_string.append(response.GetStringRef()); 2367 } 2368 } 2369 else 2370 { 2371 if (log) 2372 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2373 exit_string.assign("failed to send the k packet"); 2374 } 2375 } 2376 else 2377 { 2378 if (log) 2379 log->Printf ("ProcessGDBRemote::DoDestroy - killed or interrupted while attaching"); 2380 exit_string.assign ("killed or interrupted while attaching."); 2381 } 2382 } 2383 else 2384 { 2385 // If we missed setting the exit status on the way out, do it here. 2386 // NB set exit status can be called multiple times, the first one sets the status. 2387 exit_string.assign("destroying when not connected to debugserver"); 2388 } 2389 2390 SetExitStatus(exit_status, exit_string.c_str()); 2391 2392 StopAsyncThread (); 2393 KillDebugserverProcess (); 2394 return error; 2395 } 2396 2397 void 2398 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 2399 { 2400 Mutex::Locker locker (m_last_stop_packet_mutex); 2401 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 2402 if (did_exec) 2403 { 2404 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2405 if (log) 2406 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 2407 2408 m_thread_list_real.Clear(); 2409 m_thread_list.Clear(); 2410 BuildDynamicRegisterInfo (true); 2411 m_gdb_comm.ResetDiscoverableSettings(); 2412 } 2413 m_last_stop_packet = response; 2414 } 2415 2416 2417 //------------------------------------------------------------------ 2418 // Process Queries 2419 //------------------------------------------------------------------ 2420 2421 bool 2422 ProcessGDBRemote::IsAlive () 2423 { 2424 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2425 } 2426 2427 addr_t 2428 ProcessGDBRemote::GetImageInfoAddress() 2429 { 2430 // request the link map address via the $qShlibInfoAddr packet 2431 lldb::addr_t addr = m_gdb_comm.GetShlibInfoAddr(); 2432 2433 // the loaded module list can also provides a link map address 2434 if (addr == LLDB_INVALID_ADDRESS) 2435 { 2436 GDBLoadedModuleInfoList list; 2437 if (GetLoadedModuleList (list).Success()) 2438 addr = list.m_link_map; 2439 } 2440 2441 return addr; 2442 } 2443 2444 //------------------------------------------------------------------ 2445 // Process Memory 2446 //------------------------------------------------------------------ 2447 size_t 2448 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2449 { 2450 GetMaxMemorySize (); 2451 if (size > m_max_memory_size) 2452 { 2453 // Keep memory read sizes down to a sane limit. This function will be 2454 // called multiple times in order to complete the task by 2455 // lldb_private::Process so it is ok to do this. 2456 size = m_max_memory_size; 2457 } 2458 2459 char packet[64]; 2460 int packet_len; 2461 bool binary_memory_read = m_gdb_comm.GetxPacketSupported(); 2462 if (binary_memory_read) 2463 { 2464 packet_len = ::snprintf (packet, sizeof(packet), "x0x%" PRIx64 ",0x%" PRIx64, (uint64_t)addr, (uint64_t)size); 2465 } 2466 else 2467 { 2468 packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2469 } 2470 assert (packet_len + 1 < (int)sizeof(packet)); 2471 StringExtractorGDBRemote response; 2472 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) 2473 { 2474 if (response.IsNormalResponse()) 2475 { 2476 error.Clear(); 2477 if (binary_memory_read) 2478 { 2479 // The lower level GDBRemoteCommunication packet receive layer has already de-quoted any 2480 // 0x7d character escaping that was present in the packet 2481 2482 size_t data_received_size = response.GetBytesLeft(); 2483 if (data_received_size > size) 2484 { 2485 // Don't write past the end of BUF if the remote debug server gave us too 2486 // much data for some reason. 2487 data_received_size = size; 2488 } 2489 memcpy (buf, response.GetStringRef().data(), data_received_size); 2490 return data_received_size; 2491 } 2492 else 2493 { 2494 return response.GetHexBytes(buf, size, '\xdd'); 2495 } 2496 } 2497 else if (response.IsErrorResponse()) 2498 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2499 else if (response.IsUnsupportedResponse()) 2500 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2501 else 2502 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2503 } 2504 else 2505 { 2506 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2507 } 2508 return 0; 2509 } 2510 2511 size_t 2512 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2513 { 2514 GetMaxMemorySize (); 2515 if (size > m_max_memory_size) 2516 { 2517 // Keep memory read sizes down to a sane limit. This function will be 2518 // called multiple times in order to complete the task by 2519 // lldb_private::Process so it is ok to do this. 2520 size = m_max_memory_size; 2521 } 2522 2523 StreamString packet; 2524 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2525 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2526 StringExtractorGDBRemote response; 2527 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) 2528 { 2529 if (response.IsOKResponse()) 2530 { 2531 error.Clear(); 2532 return size; 2533 } 2534 else if (response.IsErrorResponse()) 2535 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2536 else if (response.IsUnsupportedResponse()) 2537 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2538 else 2539 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2540 } 2541 else 2542 { 2543 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 2544 } 2545 return 0; 2546 } 2547 2548 lldb::addr_t 2549 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2550 { 2551 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_EXPRESSIONS)); 2552 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2553 2554 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2555 switch (supported) 2556 { 2557 case eLazyBoolCalculate: 2558 case eLazyBoolYes: 2559 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2560 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2561 return allocated_addr; 2562 2563 case eLazyBoolNo: 2564 // Call mmap() to create memory in the inferior.. 2565 unsigned prot = 0; 2566 if (permissions & lldb::ePermissionsReadable) 2567 prot |= eMmapProtRead; 2568 if (permissions & lldb::ePermissionsWritable) 2569 prot |= eMmapProtWrite; 2570 if (permissions & lldb::ePermissionsExecutable) 2571 prot |= eMmapProtExec; 2572 2573 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2574 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2575 m_addr_to_mmap_size[allocated_addr] = size; 2576 else 2577 { 2578 allocated_addr = LLDB_INVALID_ADDRESS; 2579 if (log) 2580 log->Printf ("ProcessGDBRemote::%s no direct stub support for memory allocation, and InferiorCallMmap also failed - is stub missing register context save/restore capability?", __FUNCTION__); 2581 } 2582 break; 2583 } 2584 2585 if (allocated_addr == LLDB_INVALID_ADDRESS) 2586 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2587 else 2588 error.Clear(); 2589 return allocated_addr; 2590 } 2591 2592 Error 2593 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2594 MemoryRegionInfo ®ion_info) 2595 { 2596 2597 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2598 return error; 2599 } 2600 2601 Error 2602 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2603 { 2604 2605 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2606 return error; 2607 } 2608 2609 Error 2610 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2611 { 2612 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2613 return error; 2614 } 2615 2616 Error 2617 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2618 { 2619 Error error; 2620 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2621 2622 switch (supported) 2623 { 2624 case eLazyBoolCalculate: 2625 // We should never be deallocating memory without allocating memory 2626 // first so we should never get eLazyBoolCalculate 2627 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2628 break; 2629 2630 case eLazyBoolYes: 2631 if (!m_gdb_comm.DeallocateMemory (addr)) 2632 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2633 break; 2634 2635 case eLazyBoolNo: 2636 // Call munmap() to deallocate memory in the inferior.. 2637 { 2638 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2639 if (pos != m_addr_to_mmap_size.end() && 2640 InferiorCallMunmap(this, addr, pos->second)) 2641 m_addr_to_mmap_size.erase (pos); 2642 else 2643 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2644 } 2645 break; 2646 } 2647 2648 return error; 2649 } 2650 2651 2652 //------------------------------------------------------------------ 2653 // Process STDIO 2654 //------------------------------------------------------------------ 2655 size_t 2656 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2657 { 2658 if (m_stdio_communication.IsConnected()) 2659 { 2660 ConnectionStatus status; 2661 m_stdio_communication.Write(src, src_len, status, NULL); 2662 } 2663 else if (m_stdin_forward) 2664 { 2665 m_gdb_comm.SendStdinNotification(src, src_len); 2666 } 2667 return 0; 2668 } 2669 2670 Error 2671 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2672 { 2673 Error error; 2674 assert(bp_site != NULL); 2675 2676 // Get logging info 2677 Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2678 user_id_t site_id = bp_site->GetID(); 2679 2680 // Get the breakpoint address 2681 const addr_t addr = bp_site->GetLoadAddress(); 2682 2683 // Log that a breakpoint was requested 2684 if (log) 2685 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2686 2687 // Breakpoint already exists and is enabled 2688 if (bp_site->IsEnabled()) 2689 { 2690 if (log) 2691 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2692 return error; 2693 } 2694 2695 // Get the software breakpoint trap opcode size 2696 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site); 2697 2698 // SupportsGDBStoppointPacket() simply checks a boolean, indicating if this breakpoint type 2699 // is supported by the remote stub. These are set to true by default, and later set to false 2700 // only after we receive an unimplemented response when sending a breakpoint packet. This means 2701 // initially that unless we were specifically instructed to use a hardware breakpoint, LLDB will 2702 // attempt to set a software breakpoint. HardwareRequired() also queries a boolean variable which 2703 // indicates if the user specifically asked for hardware breakpoints. If true then we will 2704 // skip over software breakpoints. 2705 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware) && (!bp_site->HardwareRequired())) 2706 { 2707 // Try to send off a software breakpoint packet ($Z0) 2708 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2709 { 2710 // The breakpoint was placed successfully 2711 bp_site->SetEnabled(true); 2712 bp_site->SetType(BreakpointSite::eExternal); 2713 return error; 2714 } 2715 2716 // SendGDBStoppointTypePacket() will return an error if it was unable to set this 2717 // breakpoint. We need to differentiate between a error specific to placing this breakpoint 2718 // or if we have learned that this breakpoint type is unsupported. To do this, we 2719 // must test the support boolean for this breakpoint type to see if it now indicates that 2720 // this breakpoint type is unsupported. If they are still supported then we should return 2721 // with the error code. If they are now unsupported, then we would like to fall through 2722 // and try another form of breakpoint. 2723 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware)) 2724 return error; 2725 2726 // We reach here when software breakpoints have been found to be unsupported. For future 2727 // calls to set a breakpoint, we will not attempt to set a breakpoint with a type that is 2728 // known not to be supported. 2729 if (log) 2730 log->Printf("Software breakpoints are unsupported"); 2731 2732 // So we will fall through and try a hardware breakpoint 2733 } 2734 2735 // The process of setting a hardware breakpoint is much the same as above. We check the 2736 // supported boolean for this breakpoint type, and if it is thought to be supported then we 2737 // will try to set this breakpoint with a hardware breakpoint. 2738 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 2739 { 2740 // Try to send off a hardware breakpoint packet ($Z1) 2741 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2742 { 2743 // The breakpoint was placed successfully 2744 bp_site->SetEnabled(true); 2745 bp_site->SetType(BreakpointSite::eHardware); 2746 return error; 2747 } 2748 2749 // Check if the error was something other then an unsupported breakpoint type 2750 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 2751 { 2752 // Unable to set this hardware breakpoint 2753 error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); 2754 return error; 2755 } 2756 2757 // We will reach here when the stub gives an unsupported response to a hardware breakpoint 2758 if (log) 2759 log->Printf("Hardware breakpoints are unsupported"); 2760 2761 // Finally we will falling through to a #trap style breakpoint 2762 } 2763 2764 // Don't fall through when hardware breakpoints were specifically requested 2765 if (bp_site->HardwareRequired()) 2766 { 2767 error.SetErrorString("hardware breakpoints are not supported"); 2768 return error; 2769 } 2770 2771 // As a last resort we want to place a manual breakpoint. An instruction 2772 // is placed into the process memory using memory write packets. 2773 return EnableSoftwareBreakpoint(bp_site); 2774 } 2775 2776 Error 2777 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2778 { 2779 Error error; 2780 assert (bp_site != NULL); 2781 addr_t addr = bp_site->GetLoadAddress(); 2782 user_id_t site_id = bp_site->GetID(); 2783 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2784 if (log) 2785 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2786 2787 if (bp_site->IsEnabled()) 2788 { 2789 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2790 2791 BreakpointSite::Type bp_type = bp_site->GetType(); 2792 switch (bp_type) 2793 { 2794 case BreakpointSite::eSoftware: 2795 error = DisableSoftwareBreakpoint (bp_site); 2796 break; 2797 2798 case BreakpointSite::eHardware: 2799 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, false, addr, bp_op_size)) 2800 error.SetErrorToGenericError(); 2801 break; 2802 2803 case BreakpointSite::eExternal: 2804 { 2805 GDBStoppointType stoppoint_type; 2806 if (bp_site->IsHardware()) 2807 stoppoint_type = eBreakpointHardware; 2808 else 2809 stoppoint_type = eBreakpointSoftware; 2810 2811 if (m_gdb_comm.SendGDBStoppointTypePacket(stoppoint_type, false, addr, bp_op_size)) 2812 error.SetErrorToGenericError(); 2813 } 2814 break; 2815 } 2816 if (error.Success()) 2817 bp_site->SetEnabled(false); 2818 } 2819 else 2820 { 2821 if (log) 2822 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2823 return error; 2824 } 2825 2826 if (error.Success()) 2827 error.SetErrorToGenericError(); 2828 return error; 2829 } 2830 2831 // Pre-requisite: wp != NULL. 2832 static GDBStoppointType 2833 GetGDBStoppointType (Watchpoint *wp) 2834 { 2835 assert(wp); 2836 bool watch_read = wp->WatchpointRead(); 2837 bool watch_write = wp->WatchpointWrite(); 2838 2839 // watch_read and watch_write cannot both be false. 2840 assert(watch_read || watch_write); 2841 if (watch_read && watch_write) 2842 return eWatchpointReadWrite; 2843 else if (watch_read) 2844 return eWatchpointRead; 2845 else // Must be watch_write, then. 2846 return eWatchpointWrite; 2847 } 2848 2849 Error 2850 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2851 { 2852 Error error; 2853 if (wp) 2854 { 2855 user_id_t watchID = wp->GetID(); 2856 addr_t addr = wp->GetLoadAddress(); 2857 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2858 if (log) 2859 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2860 if (wp->IsEnabled()) 2861 { 2862 if (log) 2863 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2864 return error; 2865 } 2866 2867 GDBStoppointType type = GetGDBStoppointType(wp); 2868 // Pass down an appropriate z/Z packet... 2869 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2870 { 2871 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2872 { 2873 wp->SetEnabled(true, notify); 2874 return error; 2875 } 2876 else 2877 error.SetErrorString("sending gdb watchpoint packet failed"); 2878 } 2879 else 2880 error.SetErrorString("watchpoints not supported"); 2881 } 2882 else 2883 { 2884 error.SetErrorString("Watchpoint argument was NULL."); 2885 } 2886 if (error.Success()) 2887 error.SetErrorToGenericError(); 2888 return error; 2889 } 2890 2891 Error 2892 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2893 { 2894 Error error; 2895 if (wp) 2896 { 2897 user_id_t watchID = wp->GetID(); 2898 2899 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2900 2901 addr_t addr = wp->GetLoadAddress(); 2902 2903 if (log) 2904 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2905 2906 if (!wp->IsEnabled()) 2907 { 2908 if (log) 2909 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2910 // See also 'class WatchpointSentry' within StopInfo.cpp. 2911 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2912 // the watchpoint object to intelligently process this action. 2913 wp->SetEnabled(false, notify); 2914 return error; 2915 } 2916 2917 if (wp->IsHardware()) 2918 { 2919 GDBStoppointType type = GetGDBStoppointType(wp); 2920 // Pass down an appropriate z/Z packet... 2921 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2922 { 2923 wp->SetEnabled(false, notify); 2924 return error; 2925 } 2926 else 2927 error.SetErrorString("sending gdb watchpoint packet failed"); 2928 } 2929 // TODO: clear software watchpoints if we implement them 2930 } 2931 else 2932 { 2933 error.SetErrorString("Watchpoint argument was NULL."); 2934 } 2935 if (error.Success()) 2936 error.SetErrorToGenericError(); 2937 return error; 2938 } 2939 2940 void 2941 ProcessGDBRemote::Clear() 2942 { 2943 m_flags = 0; 2944 m_thread_list_real.Clear(); 2945 m_thread_list.Clear(); 2946 } 2947 2948 Error 2949 ProcessGDBRemote::DoSignal (int signo) 2950 { 2951 Error error; 2952 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2953 if (log) 2954 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2955 2956 if (!m_gdb_comm.SendAsyncSignal (signo)) 2957 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2958 return error; 2959 } 2960 2961 Error 2962 ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) 2963 { 2964 Error error; 2965 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2966 { 2967 // If we locate debugserver, keep that located version around 2968 static FileSpec g_debugserver_file_spec; 2969 2970 ProcessLaunchInfo debugserver_launch_info; 2971 // Make debugserver run in its own session so signals generated by 2972 // special terminal key sequences (^C) don't affect debugserver. 2973 debugserver_launch_info.SetLaunchInSeparateProcessGroup(true); 2974 2975 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2976 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2977 2978 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 2979 // On iOS, still do a local connection using a random port 2980 const char *hostname = "127.0.0.1"; 2981 uint16_t port = get_random_port (); 2982 #else 2983 // Set hostname being NULL to do the reverse connect where debugserver 2984 // will bind to port zero and it will communicate back to us the port 2985 // that we will connect to 2986 const char *hostname = NULL; 2987 uint16_t port = 0; 2988 #endif 2989 2990 error = m_gdb_comm.StartDebugserverProcess (hostname, 2991 port, 2992 debugserver_launch_info, 2993 port); 2994 2995 if (error.Success ()) 2996 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2997 else 2998 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2999 3000 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 3001 StartAsyncThread (); 3002 3003 if (error.Fail()) 3004 { 3005 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 3006 3007 if (log) 3008 log->Printf("failed to start debugserver process: %s", error.AsCString()); 3009 return error; 3010 } 3011 3012 if (m_gdb_comm.IsConnected()) 3013 { 3014 // Finish the connection process by doing the handshake without connecting (send NULL URL) 3015 ConnectToDebugserver (NULL); 3016 } 3017 else 3018 { 3019 StreamString connect_url; 3020 connect_url.Printf("connect://%s:%u", hostname, port); 3021 error = ConnectToDebugserver (connect_url.GetString().c_str()); 3022 } 3023 3024 } 3025 return error; 3026 } 3027 3028 bool 3029 ProcessGDBRemote::MonitorDebugserverProcess 3030 ( 3031 void *callback_baton, 3032 lldb::pid_t debugserver_pid, 3033 bool exited, // True if the process did exit 3034 int signo, // Zero for no signal 3035 int exit_status // Exit value of process if signal is zero 3036 ) 3037 { 3038 // The baton is a "ProcessGDBRemote *". Now this class might be gone 3039 // and might not exist anymore, so we need to carefully try to get the 3040 // target for this process first since we have a race condition when 3041 // we are done running between getting the notice that the inferior 3042 // process has died and the debugserver that was debugging this process. 3043 // In our test suite, we are also continually running process after 3044 // process, so we must be very careful to make sure: 3045 // 1 - process object hasn't been deleted already 3046 // 2 - that a new process object hasn't been recreated in its place 3047 3048 // "debugserver_pid" argument passed in is the process ID for 3049 // debugserver that we are tracking... 3050 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3051 3052 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 3053 3054 // Get a shared pointer to the target that has a matching process pointer. 3055 // This target could be gone, or the target could already have a new process 3056 // object inside of it 3057 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 3058 3059 if (log) 3060 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 3061 3062 if (target_sp) 3063 { 3064 // We found a process in a target that matches, but another thread 3065 // might be in the process of launching a new process that will 3066 // soon replace it, so get a shared pointer to the process so we 3067 // can keep it alive. 3068 ProcessSP process_sp (target_sp->GetProcessSP()); 3069 // Now we have a shared pointer to the process that can't go away on us 3070 // so we now make sure it was the same as the one passed in, and also make 3071 // sure that our previous "process *" didn't get deleted and have a new 3072 // "process *" created in its place with the same pointer. To verify this 3073 // we make sure the process has our debugserver process ID. If we pass all 3074 // of these tests, then we are sure that this process is the one we were 3075 // looking for. 3076 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 3077 { 3078 // Sleep for a half a second to make sure our inferior process has 3079 // time to set its exit status before we set it incorrectly when 3080 // both the debugserver and the inferior process shut down. 3081 usleep (500000); 3082 // If our process hasn't yet exited, debugserver might have died. 3083 // If the process did exit, the we are reaping it. 3084 const StateType state = process->GetState(); 3085 3086 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 3087 state != eStateInvalid && 3088 state != eStateUnloaded && 3089 state != eStateExited && 3090 state != eStateDetached) 3091 { 3092 char error_str[1024]; 3093 if (signo) 3094 { 3095 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 3096 if (signal_cstr) 3097 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 3098 else 3099 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 3100 } 3101 else 3102 { 3103 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 3104 } 3105 3106 process->SetExitStatus (-1, error_str); 3107 } 3108 // Debugserver has exited we need to let our ProcessGDBRemote 3109 // know that it no longer has a debugserver instance 3110 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 3111 } 3112 } 3113 return true; 3114 } 3115 3116 void 3117 ProcessGDBRemote::KillDebugserverProcess () 3118 { 3119 m_gdb_comm.Disconnect(); 3120 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 3121 { 3122 Host::Kill (m_debugserver_pid, SIGINT); 3123 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 3124 } 3125 } 3126 3127 void 3128 ProcessGDBRemote::Initialize() 3129 { 3130 static std::once_flag g_once_flag; 3131 3132 std::call_once(g_once_flag, []() 3133 { 3134 PluginManager::RegisterPlugin (GetPluginNameStatic(), 3135 GetPluginDescriptionStatic(), 3136 CreateInstance, 3137 DebuggerInitialize); 3138 }); 3139 } 3140 3141 void 3142 ProcessGDBRemote::DebuggerInitialize (Debugger &debugger) 3143 { 3144 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 3145 { 3146 const bool is_global_setting = true; 3147 PluginManager::CreateSettingForProcessPlugin (debugger, 3148 GetGlobalPluginProperties()->GetValueProperties(), 3149 ConstString ("Properties for the gdb-remote process plug-in."), 3150 is_global_setting); 3151 } 3152 } 3153 3154 bool 3155 ProcessGDBRemote::StartAsyncThread () 3156 { 3157 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3158 3159 if (log) 3160 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 3161 3162 Mutex::Locker start_locker(m_async_thread_state_mutex); 3163 if (!m_async_thread.IsJoinable()) 3164 { 3165 // Create a thread that watches our internal state and controls which 3166 // events make it to clients (into the DCProcess event queue). 3167 3168 m_async_thread = ThreadLauncher::LaunchThread("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 3169 } 3170 else if (log) 3171 log->Printf("ProcessGDBRemote::%s () - Called when Async thread was already running.", __FUNCTION__); 3172 3173 return m_async_thread.IsJoinable(); 3174 } 3175 3176 void 3177 ProcessGDBRemote::StopAsyncThread () 3178 { 3179 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3180 3181 if (log) 3182 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 3183 3184 Mutex::Locker start_locker(m_async_thread_state_mutex); 3185 if (m_async_thread.IsJoinable()) 3186 { 3187 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 3188 3189 // This will shut down the async thread. 3190 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 3191 3192 // Stop the stdio thread 3193 m_async_thread.Join(nullptr); 3194 m_async_thread.Reset(); 3195 } 3196 else if (log) 3197 log->Printf("ProcessGDBRemote::%s () - Called when Async thread was not running.", __FUNCTION__); 3198 } 3199 3200 3201 thread_result_t 3202 ProcessGDBRemote::AsyncThread (void *arg) 3203 { 3204 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 3205 3206 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 3207 if (log) 3208 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 3209 3210 Listener listener ("ProcessGDBRemote::AsyncThread"); 3211 EventSP event_sp; 3212 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 3213 eBroadcastBitAsyncThreadShouldExit; 3214 3215 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 3216 { 3217 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 3218 3219 bool done = false; 3220 while (!done) 3221 { 3222 if (log) 3223 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 3224 if (listener.WaitForEvent (NULL, event_sp)) 3225 { 3226 const uint32_t event_type = event_sp->GetType(); 3227 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 3228 { 3229 if (log) 3230 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 3231 3232 switch (event_type) 3233 { 3234 case eBroadcastBitAsyncContinue: 3235 { 3236 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 3237 3238 if (continue_packet) 3239 { 3240 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 3241 const size_t continue_cstr_len = continue_packet->GetByteSize (); 3242 if (log) 3243 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 3244 3245 if (::strstr (continue_cstr, "vAttach") == NULL) 3246 process->SetPrivateState(eStateRunning); 3247 StringExtractorGDBRemote response; 3248 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 3249 3250 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 3251 // The thread ID list might be contained within the "response", or the stop reply packet that 3252 // caused the stop. So clear it now before we give the stop reply packet to the process 3253 // using the process->SetLastStopPacket()... 3254 process->ClearThreadIDList (); 3255 3256 switch (stop_state) 3257 { 3258 case eStateStopped: 3259 case eStateCrashed: 3260 case eStateSuspended: 3261 process->SetLastStopPacket (response); 3262 process->SetPrivateState (stop_state); 3263 break; 3264 3265 case eStateExited: 3266 { 3267 process->SetLastStopPacket (response); 3268 process->ClearThreadIDList(); 3269 response.SetFilePos(1); 3270 3271 int exit_status = response.GetHexU8(); 3272 const char *desc_cstr = NULL; 3273 StringExtractor extractor; 3274 std::string desc_string; 3275 if (response.GetBytesLeft() > 0 && response.GetChar('-') == ';') 3276 { 3277 std::string desc_token; 3278 while (response.GetNameColonValue (desc_token, desc_string)) 3279 { 3280 if (desc_token == "description") 3281 { 3282 extractor.GetStringRef().swap(desc_string); 3283 extractor.SetFilePos(0); 3284 extractor.GetHexByteString (desc_string); 3285 desc_cstr = desc_string.c_str(); 3286 } 3287 } 3288 } 3289 process->SetExitStatus(exit_status, desc_cstr); 3290 done = true; 3291 break; 3292 } 3293 case eStateInvalid: 3294 process->SetExitStatus(-1, "lost connection"); 3295 break; 3296 3297 default: 3298 process->SetPrivateState (stop_state); 3299 break; 3300 } 3301 } 3302 } 3303 break; 3304 3305 case eBroadcastBitAsyncThreadShouldExit: 3306 if (log) 3307 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 3308 done = true; 3309 break; 3310 3311 default: 3312 if (log) 3313 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 3314 done = true; 3315 break; 3316 } 3317 } 3318 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 3319 { 3320 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 3321 { 3322 process->SetExitStatus (-1, "lost connection"); 3323 done = true; 3324 } 3325 } 3326 } 3327 else 3328 { 3329 if (log) 3330 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 3331 done = true; 3332 } 3333 } 3334 } 3335 3336 if (log) 3337 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 3338 3339 return NULL; 3340 } 3341 3342 //uint32_t 3343 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 3344 //{ 3345 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 3346 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 3347 // if (m_local_debugserver) 3348 // { 3349 // return Host::ListProcessesMatchingName (name, matches, pids); 3350 // } 3351 // else 3352 // { 3353 // // FIXME: Implement talking to the remote debugserver. 3354 // return 0; 3355 // } 3356 // 3357 //} 3358 // 3359 bool 3360 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 3361 StoppointCallbackContext *context, 3362 lldb::user_id_t break_id, 3363 lldb::user_id_t break_loc_id) 3364 { 3365 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 3366 // run so I can stop it if that's what I want to do. 3367 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3368 if (log) 3369 log->Printf("Hit New Thread Notification breakpoint."); 3370 return false; 3371 } 3372 3373 3374 bool 3375 ProcessGDBRemote::StartNoticingNewThreads() 3376 { 3377 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3378 if (m_thread_create_bp_sp) 3379 { 3380 if (log && log->GetVerbose()) 3381 log->Printf("Enabled noticing new thread breakpoint."); 3382 m_thread_create_bp_sp->SetEnabled(true); 3383 } 3384 else 3385 { 3386 PlatformSP platform_sp (m_target.GetPlatform()); 3387 if (platform_sp) 3388 { 3389 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3390 if (m_thread_create_bp_sp) 3391 { 3392 if (log && log->GetVerbose()) 3393 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3394 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3395 } 3396 else 3397 { 3398 if (log) 3399 log->Printf("Failed to create new thread notification breakpoint."); 3400 } 3401 } 3402 } 3403 return m_thread_create_bp_sp.get() != NULL; 3404 } 3405 3406 bool 3407 ProcessGDBRemote::StopNoticingNewThreads() 3408 { 3409 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3410 if (log && log->GetVerbose()) 3411 log->Printf ("Disabling new thread notification breakpoint."); 3412 3413 if (m_thread_create_bp_sp) 3414 m_thread_create_bp_sp->SetEnabled(false); 3415 3416 return true; 3417 } 3418 3419 DynamicLoader * 3420 ProcessGDBRemote::GetDynamicLoader () 3421 { 3422 if (m_dyld_ap.get() == NULL) 3423 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3424 return m_dyld_ap.get(); 3425 } 3426 3427 Error 3428 ProcessGDBRemote::SendEventData(const char *data) 3429 { 3430 int return_value; 3431 bool was_supported; 3432 3433 Error error; 3434 3435 return_value = m_gdb_comm.SendLaunchEventDataPacket (data, &was_supported); 3436 if (return_value != 0) 3437 { 3438 if (!was_supported) 3439 error.SetErrorString("Sending events is not supported for this process."); 3440 else 3441 error.SetErrorStringWithFormat("Error sending event data: %d.", return_value); 3442 } 3443 return error; 3444 } 3445 3446 const DataBufferSP 3447 ProcessGDBRemote::GetAuxvData() 3448 { 3449 DataBufferSP buf; 3450 if (m_gdb_comm.GetQXferAuxvReadSupported()) 3451 { 3452 std::string response_string; 3453 if (m_gdb_comm.SendPacketsAndConcatenateResponses("qXfer:auxv:read::", response_string) == GDBRemoteCommunication::PacketResult::Success) 3454 buf.reset(new DataBufferHeap(response_string.c_str(), response_string.length())); 3455 } 3456 return buf; 3457 } 3458 3459 StructuredData::ObjectSP 3460 ProcessGDBRemote::GetExtendedInfoForThread (lldb::tid_t tid) 3461 { 3462 StructuredData::ObjectSP object_sp; 3463 3464 if (m_gdb_comm.GetThreadExtendedInfoSupported()) 3465 { 3466 StructuredData::ObjectSP args_dict(new StructuredData::Dictionary()); 3467 SystemRuntime *runtime = GetSystemRuntime(); 3468 if (runtime) 3469 { 3470 runtime->AddThreadExtendedInfoPacketHints (args_dict); 3471 } 3472 args_dict->GetAsDictionary()->AddIntegerItem ("thread", tid); 3473 3474 StreamString packet; 3475 packet << "jThreadExtendedInfo:"; 3476 args_dict->Dump (packet); 3477 3478 // FIXME the final character of a JSON dictionary, '}', is the escape 3479 // character in gdb-remote binary mode. lldb currently doesn't escape 3480 // these characters in its packet output -- so we add the quoted version 3481 // of the } character here manually in case we talk to a debugserver which 3482 // un-escapes the characters at packet read time. 3483 packet << (char) (0x7d ^ 0x20); 3484 3485 StringExtractorGDBRemote response; 3486 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, false) == GDBRemoteCommunication::PacketResult::Success) 3487 { 3488 StringExtractorGDBRemote::ResponseType response_type = response.GetResponseType(); 3489 if (response_type == StringExtractorGDBRemote::eResponse) 3490 { 3491 if (!response.Empty()) 3492 { 3493 // The packet has already had the 0x7d xor quoting stripped out at the 3494 // GDBRemoteCommunication packet receive level. 3495 object_sp = StructuredData::ParseJSON (response.GetStringRef()); 3496 } 3497 } 3498 } 3499 } 3500 return object_sp; 3501 } 3502 3503 // Establish the largest memory read/write payloads we should use. 3504 // If the remote stub has a max packet size, stay under that size. 3505 // 3506 // If the remote stub's max packet size is crazy large, use a 3507 // reasonable largeish default. 3508 // 3509 // If the remote stub doesn't advertise a max packet size, use a 3510 // conservative default. 3511 3512 void 3513 ProcessGDBRemote::GetMaxMemorySize() 3514 { 3515 const uint64_t reasonable_largeish_default = 128 * 1024; 3516 const uint64_t conservative_default = 512; 3517 3518 if (m_max_memory_size == 0) 3519 { 3520 uint64_t stub_max_size = m_gdb_comm.GetRemoteMaxPacketSize(); 3521 if (stub_max_size != UINT64_MAX && stub_max_size != 0) 3522 { 3523 // Save the stub's claimed maximum packet size 3524 m_remote_stub_max_memory_size = stub_max_size; 3525 3526 // Even if the stub says it can support ginormous packets, 3527 // don't exceed our reasonable largeish default packet size. 3528 if (stub_max_size > reasonable_largeish_default) 3529 { 3530 stub_max_size = reasonable_largeish_default; 3531 } 3532 3533 m_max_memory_size = stub_max_size; 3534 } 3535 else 3536 { 3537 m_max_memory_size = conservative_default; 3538 } 3539 } 3540 } 3541 3542 void 3543 ProcessGDBRemote::SetUserSpecifiedMaxMemoryTransferSize (uint64_t user_specified_max) 3544 { 3545 if (user_specified_max != 0) 3546 { 3547 GetMaxMemorySize (); 3548 3549 if (m_remote_stub_max_memory_size != 0) 3550 { 3551 if (m_remote_stub_max_memory_size < user_specified_max) 3552 { 3553 m_max_memory_size = m_remote_stub_max_memory_size; // user specified a packet size too big, go as big 3554 // as the remote stub says we can go. 3555 } 3556 else 3557 { 3558 m_max_memory_size = user_specified_max; // user's packet size is good 3559 } 3560 } 3561 else 3562 { 3563 m_max_memory_size = user_specified_max; // user's packet size is probably fine 3564 } 3565 } 3566 } 3567 3568 bool 3569 ProcessGDBRemote::GetModuleSpec(const FileSpec& module_file_spec, 3570 const ArchSpec& arch, 3571 ModuleSpec &module_spec) 3572 { 3573 Log *log = GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PLATFORM); 3574 3575 if (!m_gdb_comm.GetModuleInfo (module_file_spec, arch, module_spec)) 3576 { 3577 if (log) 3578 log->Printf ("ProcessGDBRemote::%s - failed to get module info for %s:%s", 3579 __FUNCTION__, module_file_spec.GetPath ().c_str (), 3580 arch.GetTriple ().getTriple ().c_str ()); 3581 return false; 3582 } 3583 3584 if (log) 3585 { 3586 StreamString stream; 3587 module_spec.Dump (stream); 3588 log->Printf ("ProcessGDBRemote::%s - got module info for (%s:%s) : %s", 3589 __FUNCTION__, module_file_spec.GetPath ().c_str (), 3590 arch.GetTriple ().getTriple ().c_str (), stream.GetString ().c_str ()); 3591 } 3592 3593 return true; 3594 } 3595 3596 #if defined( LIBXML2_DEFINED ) 3597 namespace { 3598 3599 typedef std::vector<std::string> stringVec; 3600 typedef std::vector<xmlNodePtr> xmlNodePtrVec; 3601 3602 struct GdbServerRegisterInfo 3603 { 3604 3605 struct 3606 { 3607 bool m_has_name : 1; 3608 bool m_has_bitSize : 1; 3609 bool m_has_type : 1; 3610 bool m_has_group : 1; 3611 bool m_has_regNum : 1; 3612 } 3613 m_flags; 3614 3615 std::string m_name; 3616 std::string m_group; 3617 uint32_t m_bitSize; 3618 uint32_t m_regNum; 3619 3620 enum RegType 3621 { 3622 eUnknown , 3623 eCodePtr , 3624 eDataPtr , 3625 eInt32 , 3626 eI387Ext , 3627 } 3628 m_type; 3629 3630 void clear() 3631 { 3632 memset(&m_flags, 0, sizeof(m_flags)); 3633 } 3634 }; 3635 3636 typedef std::vector<struct GdbServerRegisterInfo> GDBServerRegisterVec; 3637 3638 struct GdbServerTargetInfo 3639 { 3640 std::string m_arch; 3641 std::string m_osabi; 3642 }; 3643 3644 // conversion table between gdb register type and enum 3645 struct 3646 { 3647 const char * m_name; 3648 GdbServerRegisterInfo::RegType m_type; 3649 } 3650 RegTypeTable[] = 3651 { 3652 { "int32" , GdbServerRegisterInfo::eInt32 }, 3653 { "int" , GdbServerRegisterInfo::eInt32 }, 3654 { "data_ptr", GdbServerRegisterInfo::eDataPtr }, 3655 { "code_ptr", GdbServerRegisterInfo::eCodePtr }, 3656 { "i387_ext", GdbServerRegisterInfo::eI387Ext }, // 80bit fpu 3657 { nullptr , GdbServerRegisterInfo::eUnknown } // sentinel 3658 }; 3659 3660 // find the first sibling with a matching name 3661 xmlNodePtr 3662 xmlExFindSibling (xmlNodePtr node, 3663 const std::string & name) 3664 { 3665 3666 if ( !node ) return nullptr; 3667 // iterate through all siblings 3668 for ( xmlNodePtr temp = node; temp; temp=temp->next ) { 3669 // we are looking for elements 3670 if ( temp->type != XML_ELEMENT_NODE ) 3671 continue; 3672 // check element name matches 3673 if ( !temp->name ) continue; 3674 if ( std::strcmp((const char*)temp->name, name.c_str() ) == 0 ) 3675 return temp; 3676 } 3677 // no sibling found 3678 return nullptr; 3679 } 3680 3681 // find an element from a given element path 3682 xmlNodePtr 3683 xmlExFindElement (xmlNodePtr node, 3684 const stringVec & path) 3685 { 3686 3687 if (!node) 3688 return nullptr; 3689 xmlNodePtr temp = node; 3690 // iterate all elements in path 3691 for (uint32_t i = 0; i < path.size(); i++) 3692 { 3693 3694 // search for a sibling with this name 3695 temp = xmlExFindSibling(temp, path[i]); 3696 if (!temp) 3697 return nullptr; 3698 // enter this node if we still need to search 3699 if ((i + 1) < path.size()) 3700 // enter the node we have found 3701 temp = temp->children; 3702 } 3703 // note: node may still be nullptr at this step 3704 return temp; 3705 } 3706 3707 // locate a specific attribute in an element 3708 xmlAttr * 3709 xmlExFindAttribute (xmlNodePtr node, 3710 const std::string & name) 3711 { 3712 3713 if (!node) 3714 return nullptr; 3715 if (node->type != XML_ELEMENT_NODE) 3716 return nullptr; 3717 // iterate over all attributes 3718 for (xmlAttrPtr attr = node->properties; attr != nullptr; attr=attr->next) 3719 { 3720 // check if name matches 3721 if (!attr->name) 3722 continue; 3723 if (std::strcmp((const char*) attr->name, name.c_str()) == 0) 3724 return attr; 3725 } 3726 return nullptr; 3727 } 3728 3729 // find all child elements with given name and add them to a vector 3730 // 3731 // input: node = xml element to search 3732 // name = name used when matching child elements 3733 // output: out = list of matches 3734 // return: number of children added to 'out' 3735 int 3736 xmlExFindChildren (xmlNodePtr node, 3737 const std::string & name, 3738 xmlNodePtrVec & out) 3739 { 3740 3741 if (!node) 3742 return 0; 3743 int count = 0; 3744 // iterate over all children 3745 for (xmlNodePtr child = node->children; child; child = child->next) 3746 { 3747 // if name matches 3748 if (!child->name) 3749 continue; 3750 if (std::strcmp((const char*) child->name, name.c_str()) == 0) 3751 { 3752 // add to output list 3753 out.push_back(child); 3754 ++count; 3755 } 3756 } 3757 return count; 3758 } 3759 3760 // get the text content from an attribute 3761 std::string 3762 xmlExGetTextContent (xmlAttrPtr attr) 3763 { 3764 if (!attr) 3765 return std::string(); 3766 if (attr->type != XML_ATTRIBUTE_NODE) 3767 return std::string(); 3768 // check child is a text node 3769 xmlNodePtr child = attr->children; 3770 if (child->type != XML_TEXT_NODE) 3771 return std::string(); 3772 // access the content 3773 assert(child->content != nullptr); 3774 return std::string((const char*) child->content); 3775 } 3776 3777 // get the text content from an node 3778 std::string 3779 xmlExGetTextContent (xmlNodePtr node) 3780 { 3781 if (!node) 3782 return std::string(); 3783 if (node->type != XML_ELEMENT_NODE) 3784 return std::string(); 3785 // check child is a text node 3786 xmlNodePtr child = node->children; 3787 if (child->type != XML_TEXT_NODE) 3788 return std::string(); 3789 // access the content 3790 assert(child->content != nullptr); 3791 return std::string((const char*) child->content); 3792 } 3793 3794 // compile a list of xml includes from the target file 3795 // input: doc = target.xml 3796 // output: includes = list of .xml names specified in target.xml 3797 // return: number of .xml files specified in target.xml and added to includes 3798 int 3799 parseTargetIncludes (xmlDocPtr doc, stringVec & includes) 3800 { 3801 if (!doc) 3802 return 0; 3803 int count = 0; 3804 xmlNodePtr elm = xmlExFindElement(doc->children, {"target"}); 3805 if (!elm) 3806 return 0; 3807 xmlNodePtrVec nodes; 3808 xmlExFindChildren(elm, "xi:include", nodes); 3809 // iterate over all includes 3810 for (uint32_t i = 0; i < nodes.size(); i++) 3811 { 3812 xmlAttrPtr attr = xmlExFindAttribute(nodes[i], "href"); 3813 if (attr != nullptr) 3814 { 3815 std::string text = xmlExGetTextContent(attr); 3816 includes.push_back(text); 3817 ++count; 3818 } 3819 } 3820 return count; 3821 } 3822 3823 // extract target arch information from the target.xml file 3824 // input: doc = target.xml document 3825 // output: out = remote target information 3826 // return: 'true' on success 3827 // 'false' on failure 3828 bool 3829 parseTargetInfo (xmlDocPtr doc, GdbServerTargetInfo & out) 3830 { 3831 if (!doc) 3832 return false; 3833 xmlNodePtr e1 = xmlExFindElement (doc->children, {"target", "architecture"}); 3834 if (!e1) 3835 return false; 3836 out.m_arch = xmlExGetTextContent (e1); 3837 3838 xmlNodePtr e2 = xmlExFindElement (doc->children, {"target", "osabi"}); 3839 if (!e2) 3840 return false; 3841 out.m_osabi = xmlExGetTextContent (e2); 3842 3843 return true; 3844 } 3845 3846 // extract register information from one of the xml files specified in target.xml 3847 // input: doc = xml document 3848 // output: regList = list of extracted register info 3849 // return: 'true' on success 3850 // 'false' on failure 3851 bool 3852 parseRegisters (xmlDocPtr doc, GDBServerRegisterVec & regList) 3853 { 3854 3855 if (!doc) 3856 return false; 3857 xmlNodePtr elm = xmlExFindElement (doc->children, {"feature"}); 3858 if (!elm) 3859 return false; 3860 3861 xmlAttrPtr attr = nullptr; 3862 3863 xmlNodePtrVec regs; 3864 xmlExFindChildren (elm, "reg", regs); 3865 for (unsigned long i = 0; i < regs.size(); i++) 3866 { 3867 3868 GdbServerRegisterInfo reg; 3869 reg.clear(); 3870 3871 if ((attr = xmlExFindAttribute(regs[i], "name"))) 3872 { 3873 reg.m_name = xmlExGetTextContent(attr).c_str(); 3874 reg.m_flags.m_has_name = true; 3875 } 3876 3877 if ((attr = xmlExFindAttribute( regs[i], "bitsize"))) 3878 { 3879 const std::string v = xmlExGetTextContent(attr); 3880 reg.m_bitSize = atoi(v.c_str()); 3881 reg.m_flags.m_has_bitSize = true; 3882 } 3883 3884 if ((attr = xmlExFindAttribute(regs[i], "type"))) 3885 { 3886 const std::string v = xmlExGetTextContent(attr); 3887 reg.m_type = GdbServerRegisterInfo::eUnknown; 3888 3889 // search the type table for a match 3890 for (int j = 0; RegTypeTable[j].m_name !=nullptr; ++j) 3891 { 3892 if (RegTypeTable[j].m_name == v) 3893 { 3894 reg.m_type = RegTypeTable[j].m_type; 3895 break; 3896 } 3897 } 3898 3899 reg.m_flags.m_has_type = (reg.m_type != GdbServerRegisterInfo::eUnknown); 3900 } 3901 3902 if ((attr = xmlExFindAttribute( regs[i], "group"))) 3903 { 3904 reg.m_group = xmlExGetTextContent(attr); 3905 reg.m_flags.m_has_group = true; 3906 } 3907 3908 if ((attr = xmlExFindAttribute(regs[i], "regnum"))) 3909 { 3910 const std::string v = xmlExGetTextContent(attr); 3911 reg.m_regNum = atoi(v.c_str()); 3912 reg.m_flags.m_has_regNum = true; 3913 } 3914 3915 regList.push_back(reg); 3916 } 3917 3918 //TODO: there is also a "vector" element to parse 3919 //TODO: there is also eflags to parse 3920 3921 return true; 3922 } 3923 3924 // build lldb gdb-remote's dynamic register info from a vector of gdb provided registers 3925 // input: regList = register information provided by gdbserver 3926 // output: regInfo = dynamic register information required by gdb-remote 3927 void 3928 BuildRegisters (const GDBServerRegisterVec & regList, 3929 GDBRemoteDynamicRegisterInfo & regInfo) 3930 { 3931 3932 using namespace lldb_private; 3933 3934 const uint32_t defSize = 32; 3935 uint32_t regNum = 0; 3936 uint32_t byteOffset = 0; 3937 3938 for (uint32_t i = 0; i < regList.size(); ++i) 3939 { 3940 3941 const GdbServerRegisterInfo & gdbReg = regList[i]; 3942 3943 std::string name = gdbReg.m_flags.m_has_name ? gdbReg.m_name : "unknown"; 3944 std::string group = gdbReg.m_flags.m_has_group ? gdbReg.m_group : "general"; 3945 uint32_t byteSize = gdbReg.m_flags.m_has_bitSize ? (gdbReg.m_bitSize/8) : defSize; 3946 3947 if (gdbReg.m_flags.m_has_regNum) 3948 regNum = gdbReg.m_regNum; 3949 3950 uint32_t regNumGcc = LLDB_INVALID_REGNUM; 3951 uint32_t regNumDwarf = LLDB_INVALID_REGNUM; 3952 uint32_t regNumGeneric = LLDB_INVALID_REGNUM; 3953 uint32_t regNumGdb = regNum; 3954 uint32_t regNumNative = regNum; 3955 3956 if (name == "eip" || name == "pc") 3957 { 3958 regNumGeneric = LLDB_REGNUM_GENERIC_PC; 3959 } 3960 if (name == "esp" || name == "sp") 3961 { 3962 regNumGeneric = LLDB_REGNUM_GENERIC_SP; 3963 } 3964 if (name == "ebp") 3965 { 3966 regNumGeneric = LLDB_REGNUM_GENERIC_FP; 3967 } 3968 if (name == "lr") 3969 { 3970 regNumGeneric = LLDB_REGNUM_GENERIC_RA; 3971 } 3972 3973 RegisterInfo info = 3974 { 3975 name.c_str(), 3976 nullptr , 3977 byteSize , 3978 byteOffset , 3979 lldb::Encoding::eEncodingUint, 3980 lldb::Format::eFormatDefault, 3981 { regNumGcc , 3982 regNumDwarf , 3983 regNumGeneric, 3984 regNumGdb , 3985 regNumNative }, 3986 nullptr, 3987 nullptr 3988 }; 3989 3990 ConstString regName = ConstString(gdbReg.m_name); 3991 ConstString regAltName = ConstString(); 3992 ConstString regGroup = ConstString(group); 3993 regInfo.AddRegister(info, regName, regAltName, regGroup); 3994 3995 // advance register info 3996 byteOffset += byteSize; 3997 regNum += 1; 3998 } 3999 4000 regInfo.Finalize (); 4001 } 4002 4003 } // namespace {} 4004 4005 void XMLCDECL 4006 libxml2NullErrorFunc (void *ctx, const char *msg, ...) 4007 { 4008 // do nothing currently 4009 } 4010 4011 // query the target of gdb-remote for extended target information 4012 // return: 'true' on success 4013 // 'false' on failure 4014 bool 4015 ProcessGDBRemote::GetGDBServerRegisterInfo () 4016 { 4017 4018 // redirect libxml2's error handler since the default prints to stdout 4019 xmlGenericErrorFunc func = libxml2NullErrorFunc; 4020 initGenericErrorDefaultFunc( &func ); 4021 4022 GDBRemoteCommunicationClient & comm = m_gdb_comm; 4023 GDBRemoteDynamicRegisterInfo & regInfo = m_register_info; 4024 4025 // check that we have extended feature read support 4026 if ( !comm.GetQXferFeaturesReadSupported( ) ) 4027 return false; 4028 4029 // request the target xml file 4030 std::string raw; 4031 lldb_private::Error lldberr; 4032 if (!comm.ReadExtFeature(ConstString("features"), 4033 ConstString("target.xml"), 4034 raw, 4035 lldberr)) 4036 { 4037 return false; 4038 } 4039 4040 // parse the xml file in memory 4041 xmlDocPtr doc = xmlReadMemory(raw.c_str(), raw.size(), "noname.xml", nullptr, 0); 4042 if (doc == nullptr) 4043 return false; 4044 4045 // extract target info from target.xml 4046 GdbServerTargetInfo gdbInfo; 4047 if (parseTargetInfo(doc, gdbInfo)) 4048 { 4049 // NOTE: We could deduce triple from gdbInfo if lldb doesn't already have one set 4050 } 4051 4052 // collect registers from all of the includes 4053 GDBServerRegisterVec regList; 4054 stringVec includes; 4055 if (parseTargetIncludes(doc, includes) > 0) 4056 { 4057 4058 for (uint32_t i = 0; i < includes.size(); ++i) 4059 { 4060 4061 // request register file 4062 if (!comm.ReadExtFeature(ConstString("features"), 4063 ConstString(includes[i]), 4064 raw, 4065 lldberr)) 4066 continue; 4067 4068 // parse register file 4069 xmlDocPtr regXml = xmlReadMemory(raw.c_str(), 4070 raw.size( ), 4071 includes[i].c_str(), 4072 nullptr, 4073 0); 4074 if (!regXml) 4075 continue; 4076 4077 // pass registers to lldb 4078 parseRegisters(regXml, regList); 4079 } 4080 } 4081 4082 // pass all of these registers to lldb 4083 BuildRegisters(regList, regInfo); 4084 4085 return true; 4086 } 4087 4088 Error 4089 ProcessGDBRemote::GetLoadedModuleList (GDBLoadedModuleInfoList & list) 4090 { 4091 Log *log = GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS); 4092 if (log) 4093 log->Printf ("ProcessGDBRemote::%s", __FUNCTION__); 4094 4095 // redirect libxml2's error handler since the default prints to stdout 4096 xmlGenericErrorFunc func = libxml2NullErrorFunc; 4097 initGenericErrorDefaultFunc (&func); 4098 4099 GDBRemoteCommunicationClient & comm = m_gdb_comm; 4100 4101 // check that we have extended feature read support 4102 if (!comm.GetQXferLibrariesSVR4ReadSupported ()) 4103 return Error (0, ErrorType::eErrorTypeGeneric); 4104 4105 list.clear (); 4106 4107 // request the loaded library list 4108 std::string raw; 4109 lldb_private::Error lldberr; 4110 if (!comm.ReadExtFeature (ConstString ("libraries-svr4"), ConstString (""), raw, lldberr)) 4111 return Error (0, ErrorType::eErrorTypeGeneric); 4112 4113 // parse the xml file in memory 4114 if (log) 4115 log->Printf ("parsing: %s", raw.c_str()); 4116 xmlDocPtr doc = xmlReadMemory (raw.c_str(), raw.size(), "noname.xml", nullptr, 0); 4117 if (doc == nullptr) 4118 return Error (0, ErrorType::eErrorTypeGeneric); 4119 4120 xmlNodePtr elm = xmlExFindElement (doc->children, {"library-list-svr4"}); 4121 if (!elm) 4122 return Error(); 4123 4124 // main link map structure 4125 xmlAttr * attr = xmlExFindAttribute (elm, "main-lm"); 4126 if (attr) 4127 { 4128 std::string val = xmlExGetTextContent (attr); 4129 if (val.length() > 2) 4130 { 4131 uint32_t process_lm = std::stoul (val.c_str()+2, 0, 16); 4132 list.m_link_map = process_lm; 4133 } 4134 } 4135 4136 // parse individual library entries 4137 for (xmlNode * child = elm->children; child; child=child->next) 4138 { 4139 if (!child->name) 4140 continue; 4141 4142 if (strcmp ((const char*)child->name, "library") != 0) 4143 continue; 4144 4145 GDBLoadedModuleInfoList::LoadedModuleInfo module; 4146 4147 for (xmlAttrPtr prop = child->properties; prop; prop=prop->next) 4148 { 4149 if (strcmp ((const char*)prop->name, "name") == 0) 4150 module.set_name (xmlExGetTextContent (prop)); 4151 4152 // the address of the link_map struct. 4153 if (strcmp ((const char*)prop->name, "lm") == 0) 4154 { 4155 std::string val = xmlExGetTextContent (prop); 4156 if (val.length() > 2) 4157 { 4158 uint32_t module_lm = std::stoul (val.c_str()+2, 0, 16); 4159 module.set_link_map (module_lm); 4160 } 4161 } 4162 4163 // the displacement as read from the field 'l_addr' of the link_map struct. 4164 if (strcmp ((const char*)prop->name, "l_addr") == 0) 4165 { 4166 std::string val = xmlExGetTextContent (prop); 4167 if (val.length() > 2) 4168 { 4169 uint32_t module_base = std::stoul (val.c_str()+2, 0, 16); 4170 module.set_base (module_base); 4171 } 4172 } 4173 4174 // the memory address of the libraries PT_DYAMIC section. 4175 if (strcmp ((const char*)prop->name, "l_ld") == 0) 4176 { 4177 std::string val = xmlExGetTextContent (prop); 4178 if (val.length() > 2) 4179 { 4180 uint32_t module_dyn = std::stoul (val.c_str()+2, 0, 16); 4181 module.set_dynamic (module_dyn); 4182 } 4183 } 4184 } 4185 4186 if (log) 4187 { 4188 std::string name (""); 4189 lldb::addr_t lm=0, base=0, ld=0; 4190 4191 module.get_name (name); 4192 module.get_link_map (lm); 4193 module.get_base (base); 4194 module.get_dynamic (ld); 4195 4196 log->Printf ("found (link_map:0x08%" PRIx64 ", base:0x08%" PRIx64 ", ld:0x08%" PRIx64 ", name:'%s')", lm, base, ld, name.c_str()); 4197 } 4198 4199 list.add (module); 4200 } 4201 4202 if (log) 4203 log->Printf ("found %" PRId32 " modules in total", (int) list.m_list.size()); 4204 4205 return Error(); 4206 } 4207 4208 #else // if defined( LIBXML2_DEFINED ) 4209 4210 Error 4211 ProcessGDBRemote::GetLoadedModuleList (GDBLoadedModuleInfoList &) 4212 { 4213 // stub (libxml2 not present) 4214 Error err; 4215 err.SetError (0, ErrorType::eErrorTypeGeneric); 4216 return err; 4217 } 4218 4219 bool 4220 ProcessGDBRemote::GetGDBServerRegisterInfo () 4221 { 4222 // stub (libxml2 not present) 4223 return false; 4224 } 4225 4226 #endif // if defined( LIBXML2_DEFINED ) 4227 4228 lldb::ModuleSP 4229 ProcessGDBRemote::LoadModuleAtAddress (const FileSpec &file, lldb::addr_t base_addr) 4230 { 4231 Target &target = m_process->GetTarget(); 4232 ModuleList &modules = target.GetImages(); 4233 ModuleSP module_sp; 4234 4235 bool changed = false; 4236 4237 ModuleSpec module_spec (file, target.GetArchitecture()); 4238 if ((module_sp = modules.FindFirstModule (module_spec))) 4239 { 4240 module_sp->SetLoadAddress (target, base_addr, true, changed); 4241 } 4242 else if ((module_sp = target.GetSharedModule (module_spec))) 4243 { 4244 module_sp->SetLoadAddress (target, base_addr, true, changed); 4245 } 4246 4247 return module_sp; 4248 } 4249 4250 size_t 4251 ProcessGDBRemote::LoadModules () 4252 { 4253 using lldb_private::process_gdb_remote::ProcessGDBRemote; 4254 4255 // request a list of loaded libraries from GDBServer 4256 GDBLoadedModuleInfoList module_list; 4257 if (GetLoadedModuleList (module_list).Fail()) 4258 return 0; 4259 4260 // get a list of all the modules 4261 ModuleList new_modules; 4262 4263 for (GDBLoadedModuleInfoList::LoadedModuleInfo & modInfo : module_list.m_list) 4264 { 4265 std::string mod_name; 4266 lldb::addr_t mod_base; 4267 4268 bool valid = true; 4269 valid &= modInfo.get_name (mod_name); 4270 valid &= modInfo.get_base (mod_base); 4271 if (!valid) 4272 continue; 4273 4274 // hack (cleaner way to get file name only?) (win/unix compat?) 4275 size_t marker = mod_name.rfind ('/'); 4276 if (marker == std::string::npos) 4277 marker = 0; 4278 else 4279 marker += 1; 4280 4281 FileSpec file (mod_name.c_str()+marker, true); 4282 lldb::ModuleSP module_sp = LoadModuleAtAddress (file, mod_base); 4283 4284 if (module_sp.get()) 4285 new_modules.Append (module_sp); 4286 } 4287 4288 if (new_modules.GetSize() > 0) 4289 { 4290 Target & target = m_target; 4291 4292 new_modules.ForEach ([&target](const lldb::ModuleSP module_sp) -> bool 4293 { 4294 lldb_private::ObjectFile * obj = module_sp->GetObjectFile (); 4295 if (!obj) 4296 return true; 4297 4298 if (obj->GetType () != ObjectFile::Type::eTypeExecutable) 4299 return true; 4300 4301 lldb::ModuleSP module_copy_sp = module_sp; 4302 target.SetExecutableModule (module_copy_sp, false); 4303 return false; 4304 }); 4305 4306 ModuleList &loaded_modules = m_process->GetTarget().GetImages(); 4307 loaded_modules.AppendIfNeeded (new_modules); 4308 m_process->GetTarget().ModulesDidLoad (new_modules); 4309 } 4310 4311 return new_modules.GetSize(); 4312 } 4313 4314 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 4315 { 4316 private: 4317 4318 public: 4319 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 4320 CommandObjectParsed (interpreter, 4321 "process plugin packet history", 4322 "Dumps the packet history buffer. ", 4323 NULL) 4324 { 4325 } 4326 4327 ~CommandObjectProcessGDBRemotePacketHistory () 4328 { 4329 } 4330 4331 bool 4332 DoExecute (Args& command, CommandReturnObject &result) override 4333 { 4334 const size_t argc = command.GetArgumentCount(); 4335 if (argc == 0) 4336 { 4337 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4338 if (process) 4339 { 4340 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 4341 result.SetStatus (eReturnStatusSuccessFinishResult); 4342 return true; 4343 } 4344 } 4345 else 4346 { 4347 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 4348 } 4349 result.SetStatus (eReturnStatusFailed); 4350 return false; 4351 } 4352 }; 4353 4354 class CommandObjectProcessGDBRemotePacketXferSize : public CommandObjectParsed 4355 { 4356 private: 4357 4358 public: 4359 CommandObjectProcessGDBRemotePacketXferSize(CommandInterpreter &interpreter) : 4360 CommandObjectParsed (interpreter, 4361 "process plugin packet xfer-size", 4362 "Maximum size that lldb will try to read/write one one chunk.", 4363 NULL) 4364 { 4365 } 4366 4367 ~CommandObjectProcessGDBRemotePacketXferSize () 4368 { 4369 } 4370 4371 bool 4372 DoExecute (Args& command, CommandReturnObject &result) override 4373 { 4374 const size_t argc = command.GetArgumentCount(); 4375 if (argc == 0) 4376 { 4377 result.AppendErrorWithFormat ("'%s' takes an argument to specify the max amount to be transferred when reading/writing", m_cmd_name.c_str()); 4378 result.SetStatus (eReturnStatusFailed); 4379 return false; 4380 } 4381 4382 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4383 if (process) 4384 { 4385 const char *packet_size = command.GetArgumentAtIndex(0); 4386 errno = 0; 4387 uint64_t user_specified_max = strtoul (packet_size, NULL, 10); 4388 if (errno == 0 && user_specified_max != 0) 4389 { 4390 process->SetUserSpecifiedMaxMemoryTransferSize (user_specified_max); 4391 result.SetStatus (eReturnStatusSuccessFinishResult); 4392 return true; 4393 } 4394 } 4395 result.SetStatus (eReturnStatusFailed); 4396 return false; 4397 } 4398 }; 4399 4400 4401 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 4402 { 4403 private: 4404 4405 public: 4406 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 4407 CommandObjectParsed (interpreter, 4408 "process plugin packet send", 4409 "Send a custom packet through the GDB remote protocol and print the answer. " 4410 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 4411 NULL) 4412 { 4413 } 4414 4415 ~CommandObjectProcessGDBRemotePacketSend () 4416 { 4417 } 4418 4419 bool 4420 DoExecute (Args& command, CommandReturnObject &result) override 4421 { 4422 const size_t argc = command.GetArgumentCount(); 4423 if (argc == 0) 4424 { 4425 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 4426 result.SetStatus (eReturnStatusFailed); 4427 return false; 4428 } 4429 4430 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4431 if (process) 4432 { 4433 for (size_t i=0; i<argc; ++ i) 4434 { 4435 const char *packet_cstr = command.GetArgumentAtIndex(0); 4436 bool send_async = true; 4437 StringExtractorGDBRemote response; 4438 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 4439 result.SetStatus (eReturnStatusSuccessFinishResult); 4440 Stream &output_strm = result.GetOutputStream(); 4441 output_strm.Printf (" packet: %s\n", packet_cstr); 4442 std::string &response_str = response.GetStringRef(); 4443 4444 if (strstr(packet_cstr, "qGetProfileData") != NULL) 4445 { 4446 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 4447 } 4448 4449 if (response_str.empty()) 4450 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 4451 else 4452 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 4453 } 4454 } 4455 return true; 4456 } 4457 }; 4458 4459 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 4460 { 4461 private: 4462 4463 public: 4464 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 4465 CommandObjectRaw (interpreter, 4466 "process plugin packet monitor", 4467 "Send a qRcmd packet through the GDB remote protocol and print the response." 4468 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 4469 NULL) 4470 { 4471 } 4472 4473 ~CommandObjectProcessGDBRemotePacketMonitor () 4474 { 4475 } 4476 4477 bool 4478 DoExecute (const char *command, CommandReturnObject &result) override 4479 { 4480 if (command == NULL || command[0] == '\0') 4481 { 4482 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 4483 result.SetStatus (eReturnStatusFailed); 4484 return false; 4485 } 4486 4487 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4488 if (process) 4489 { 4490 StreamString packet; 4491 packet.PutCString("qRcmd,"); 4492 packet.PutBytesAsRawHex8(command, strlen(command)); 4493 const char *packet_cstr = packet.GetString().c_str(); 4494 4495 bool send_async = true; 4496 StringExtractorGDBRemote response; 4497 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 4498 result.SetStatus (eReturnStatusSuccessFinishResult); 4499 Stream &output_strm = result.GetOutputStream(); 4500 output_strm.Printf (" packet: %s\n", packet_cstr); 4501 const std::string &response_str = response.GetStringRef(); 4502 4503 if (response_str.empty()) 4504 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 4505 else 4506 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 4507 } 4508 return true; 4509 } 4510 }; 4511 4512 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 4513 { 4514 private: 4515 4516 public: 4517 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 4518 CommandObjectMultiword (interpreter, 4519 "process plugin packet", 4520 "Commands that deal with GDB remote packets.", 4521 NULL) 4522 { 4523 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 4524 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 4525 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 4526 LoadSubCommand ("xfer-size", CommandObjectSP (new CommandObjectProcessGDBRemotePacketXferSize (interpreter))); 4527 } 4528 4529 ~CommandObjectProcessGDBRemotePacket () 4530 { 4531 } 4532 }; 4533 4534 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 4535 { 4536 public: 4537 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 4538 CommandObjectMultiword (interpreter, 4539 "process plugin", 4540 "A set of commands for operating on a ProcessGDBRemote process.", 4541 "process plugin <subcommand> [<subcommand-options>]") 4542 { 4543 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 4544 } 4545 4546 ~CommandObjectMultiwordProcessGDBRemote () 4547 { 4548 } 4549 }; 4550 4551 CommandObject * 4552 ProcessGDBRemote::GetPluginCommandObject() 4553 { 4554 if (!m_command_sp) 4555 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 4556 return m_command_sp.get(); 4557 } 4558