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/Host/Config.h" 11 12 // C Includes 13 #include <errno.h> 14 #include <stdlib.h> 15 #ifndef LLDB_DISABLE_POSIX 16 #include <netinet/in.h> 17 #include <sys/mman.h> // for mmap 18 #endif 19 #include <sys/stat.h> 20 #include <sys/types.h> 21 #include <time.h> 22 23 // C++ Includes 24 #include <algorithm> 25 #include <map> 26 #include <mutex> 27 28 #include "lldb/Breakpoint/Watchpoint.h" 29 #include "lldb/Interpreter/Args.h" 30 #include "lldb/Core/ArchSpec.h" 31 #include "lldb/Core/Debugger.h" 32 #include "lldb/Host/ConnectionFileDescriptor.h" 33 #include "lldb/Host/FileSpec.h" 34 #include "lldb/Core/Module.h" 35 #include "lldb/Core/ModuleSpec.h" 36 #include "lldb/Core/PluginManager.h" 37 #include "lldb/Core/State.h" 38 #include "lldb/Core/StreamFile.h" 39 #include "lldb/Core/StreamString.h" 40 #include "lldb/Core/Timer.h" 41 #include "lldb/Core/Value.h" 42 #include "lldb/DataFormatters/FormatManager.h" 43 #include "lldb/Host/HostThread.h" 44 #include "lldb/Host/StringConvert.h" 45 #include "lldb/Host/Symbols.h" 46 #include "lldb/Host/ThreadLauncher.h" 47 #include "lldb/Host/TimeValue.h" 48 #include "lldb/Host/XML.h" 49 #include "lldb/Interpreter/CommandInterpreter.h" 50 #include "lldb/Interpreter/CommandObject.h" 51 #include "lldb/Interpreter/CommandObjectMultiword.h" 52 #include "lldb/Interpreter/CommandReturnObject.h" 53 #include "lldb/Interpreter/OptionValueProperties.h" 54 #include "lldb/Interpreter/Options.h" 55 #include "lldb/Interpreter/OptionGroupBoolean.h" 56 #include "lldb/Interpreter/OptionGroupUInt64.h" 57 #include "lldb/Interpreter/Property.h" 58 #include "lldb/Symbol/ObjectFile.h" 59 #include "lldb/Target/DynamicLoader.h" 60 #include "lldb/Target/Target.h" 61 #include "lldb/Target/TargetList.h" 62 #include "lldb/Target/ThreadPlanCallFunction.h" 63 #include "lldb/Target/SystemRuntime.h" 64 #include "lldb/Utility/PseudoTerminal.h" 65 66 // Project includes 67 #include "lldb/Host/Host.h" 68 #include "Plugins/Process/Utility/GDBRemoteSignals.h" 69 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 70 #include "Plugins/Process/Utility/StopInfoMachException.h" 71 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 72 #include "Utility/StringExtractorGDBRemote.h" 73 #include "GDBRemoteRegisterContext.h" 74 #include "ProcessGDBRemote.h" 75 #include "ProcessGDBRemoteLog.h" 76 #include "ThreadGDBRemote.h" 77 78 #define DEBUGSERVER_BASENAME "debugserver" 79 using namespace lldb; 80 using namespace lldb_private; 81 using namespace lldb_private::process_gdb_remote; 82 83 namespace lldb 84 { 85 // Provide a function that can easily dump the packet history if we know a 86 // ProcessGDBRemote * value (which we can get from logs or from debugging). 87 // We need the function in the lldb namespace so it makes it into the final 88 // executable since the LLDB shared library only exports stuff in the lldb 89 // namespace. This allows you to attach with a debugger and call this 90 // function and get the packet history dumped to a file. 91 void 92 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 93 { 94 StreamFile strm; 95 Error error (strm.GetFile().Open(path, File::eOpenOptionWrite | File::eOpenOptionCanCreate)); 96 if (error.Success()) 97 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 98 } 99 } 100 101 namespace { 102 103 static PropertyDefinition 104 g_properties[] = 105 { 106 { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, 107 { "target-definition-file" , OptionValue::eTypeFileSpec , true, 0 , NULL, NULL, "The file that provides the description for remote target registers." }, 108 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 109 }; 110 111 enum 112 { 113 ePropertyPacketTimeout, 114 ePropertyTargetDefinitionFile 115 }; 116 117 class PluginProperties : public Properties 118 { 119 public: 120 121 static ConstString 122 GetSettingName () 123 { 124 return ProcessGDBRemote::GetPluginNameStatic(); 125 } 126 127 PluginProperties() : 128 Properties () 129 { 130 m_collection_sp.reset (new OptionValueProperties(GetSettingName())); 131 m_collection_sp->Initialize(g_properties); 132 } 133 134 virtual 135 ~PluginProperties() 136 { 137 } 138 139 uint64_t 140 GetPacketTimeout() 141 { 142 const uint32_t idx = ePropertyPacketTimeout; 143 return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); 144 } 145 146 bool 147 SetPacketTimeout(uint64_t timeout) 148 { 149 const uint32_t idx = ePropertyPacketTimeout; 150 return m_collection_sp->SetPropertyAtIndexAsUInt64(NULL, idx, timeout); 151 } 152 153 FileSpec 154 GetTargetDefinitionFile () const 155 { 156 const uint32_t idx = ePropertyTargetDefinitionFile; 157 return m_collection_sp->GetPropertyAtIndexAsFileSpec (NULL, idx); 158 } 159 }; 160 161 typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; 162 163 static const ProcessKDPPropertiesSP & 164 GetGlobalPluginProperties() 165 { 166 static ProcessKDPPropertiesSP g_settings_sp; 167 if (!g_settings_sp) 168 g_settings_sp.reset (new PluginProperties ()); 169 return g_settings_sp; 170 } 171 172 } // anonymous namespace end 173 174 class ProcessGDBRemote::GDBLoadedModuleInfoList 175 { 176 public: 177 178 class LoadedModuleInfo 179 { 180 public: 181 182 enum e_data_point 183 { 184 e_has_name = 0, 185 e_has_base , 186 e_has_dynamic , 187 e_has_link_map , 188 e_num 189 }; 190 191 LoadedModuleInfo () 192 { 193 for (uint32_t i = 0; i < e_num; ++i) 194 m_has[i] = false; 195 } 196 197 void set_name (const std::string & name) 198 { 199 m_name = name; 200 m_has[e_has_name] = true; 201 } 202 bool get_name (std::string & out) const 203 { 204 out = m_name; 205 return m_has[e_has_name]; 206 } 207 208 void set_base (const lldb::addr_t base) 209 { 210 m_base = base; 211 m_has[e_has_base] = true; 212 } 213 bool get_base (lldb::addr_t & out) const 214 { 215 out = m_base; 216 return m_has[e_has_base]; 217 } 218 219 void set_link_map (const lldb::addr_t addr) 220 { 221 m_link_map = addr; 222 m_has[e_has_link_map] = true; 223 } 224 bool get_link_map (lldb::addr_t & out) const 225 { 226 out = m_link_map; 227 return m_has[e_has_link_map]; 228 } 229 230 void set_dynamic (const lldb::addr_t addr) 231 { 232 m_dynamic = addr; 233 m_has[e_has_dynamic] = true; 234 } 235 bool get_dynamic (lldb::addr_t & out) const 236 { 237 out = m_dynamic; 238 return m_has[e_has_dynamic]; 239 } 240 241 bool has_info (e_data_point datum) 242 { 243 assert (datum < e_num); 244 return m_has[datum]; 245 } 246 247 protected: 248 249 bool m_has[e_num]; 250 std::string m_name; 251 lldb::addr_t m_link_map; 252 lldb::addr_t m_base; 253 lldb::addr_t m_dynamic; 254 }; 255 256 GDBLoadedModuleInfoList () 257 : m_list () 258 , m_link_map (LLDB_INVALID_ADDRESS) 259 {} 260 261 void add (const LoadedModuleInfo & mod) 262 { 263 m_list.push_back (mod); 264 } 265 266 void clear () 267 { 268 m_list.clear (); 269 } 270 271 std::vector<LoadedModuleInfo> m_list; 272 lldb::addr_t m_link_map; 273 }; 274 275 // TODO Randomly assigning a port is unsafe. We should get an unused 276 // ephemeral port from the kernel and make sure we reserve it before passing 277 // it to debugserver. 278 279 #if defined (__APPLE__) 280 #define LOW_PORT (IPPORT_RESERVED) 281 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 282 #else 283 #define LOW_PORT (1024u) 284 #define HIGH_PORT (49151u) 285 #endif 286 287 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__) || defined(__aarch64__)) 288 static bool rand_initialized = false; 289 290 static inline uint16_t 291 get_random_port () 292 { 293 if (!rand_initialized) 294 { 295 time_t seed = time(NULL); 296 297 rand_initialized = true; 298 srand(seed); 299 } 300 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 301 } 302 #endif 303 304 ConstString 305 ProcessGDBRemote::GetPluginNameStatic() 306 { 307 static ConstString g_name("gdb-remote"); 308 return g_name; 309 } 310 311 const char * 312 ProcessGDBRemote::GetPluginDescriptionStatic() 313 { 314 return "GDB Remote protocol based debugging plug-in."; 315 } 316 317 void 318 ProcessGDBRemote::Terminate() 319 { 320 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 321 } 322 323 324 lldb::ProcessSP 325 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 326 { 327 lldb::ProcessSP process_sp; 328 if (crash_file_path == NULL) 329 process_sp.reset (new ProcessGDBRemote (target, listener)); 330 return process_sp; 331 } 332 333 bool 334 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 335 { 336 if (plugin_specified_by_name) 337 return true; 338 339 // For now we are just making sure the file exists for a given module 340 Module *exe_module = target.GetExecutableModulePointer(); 341 if (exe_module) 342 { 343 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 344 // We can't debug core files... 345 switch (exe_objfile->GetType()) 346 { 347 case ObjectFile::eTypeInvalid: 348 case ObjectFile::eTypeCoreFile: 349 case ObjectFile::eTypeDebugInfo: 350 case ObjectFile::eTypeObjectFile: 351 case ObjectFile::eTypeSharedLibrary: 352 case ObjectFile::eTypeStubLibrary: 353 case ObjectFile::eTypeJIT: 354 return false; 355 case ObjectFile::eTypeExecutable: 356 case ObjectFile::eTypeDynamicLinker: 357 case ObjectFile::eTypeUnknown: 358 break; 359 } 360 return exe_module->GetFileSpec().Exists(); 361 } 362 // However, if there is no executable module, we return true since we might be preparing to attach. 363 return true; 364 } 365 366 //---------------------------------------------------------------------- 367 // ProcessGDBRemote constructor 368 //---------------------------------------------------------------------- 369 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 370 Process (target, listener), 371 m_flags (0), 372 m_gdb_comm (), 373 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 374 m_last_stop_packet_mutex (Mutex::eMutexTypeRecursive), 375 m_register_info (), 376 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 377 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 378 m_thread_ids (), 379 m_jstopinfo_sp (), 380 m_jthreadsinfo_sp (), 381 m_continue_c_tids (), 382 m_continue_C_tids (), 383 m_continue_s_tids (), 384 m_continue_S_tids (), 385 m_max_memory_size (0), 386 m_remote_stub_max_memory_size (0), 387 m_addr_to_mmap_size (), 388 m_thread_create_bp_sp (), 389 m_waiting_for_attach (false), 390 m_destroy_tried_resuming (false), 391 m_command_sp (), 392 m_breakpoint_pc_offset (0), 393 m_initial_tid (LLDB_INVALID_THREAD_ID) 394 { 395 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 396 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 397 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 398 const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); 399 if (timeout_seconds > 0) 400 m_gdb_comm.SetPacketTimeout(timeout_seconds); 401 } 402 403 //---------------------------------------------------------------------- 404 // Destructor 405 //---------------------------------------------------------------------- 406 ProcessGDBRemote::~ProcessGDBRemote() 407 { 408 // m_mach_process.UnregisterNotificationCallbacks (this); 409 Clear(); 410 // We need to call finalize on the process before destroying ourselves 411 // to make sure all of the broadcaster cleanup goes as planned. If we 412 // destruct this class, then Process::~Process() might have problems 413 // trying to fully destroy the broadcaster. 414 Finalize(); 415 416 // The general Finalize is going to try to destroy the process and that SHOULD 417 // shut down the async thread. However, if we don't kill it it will get stranded and 418 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 419 StopAsyncThread(); 420 KillDebugserverProcess(); 421 } 422 423 //---------------------------------------------------------------------- 424 // PluginInterface 425 //---------------------------------------------------------------------- 426 ConstString 427 ProcessGDBRemote::GetPluginName() 428 { 429 return GetPluginNameStatic(); 430 } 431 432 uint32_t 433 ProcessGDBRemote::GetPluginVersion() 434 { 435 return 1; 436 } 437 438 bool 439 ProcessGDBRemote::ParsePythonTargetDefinition(const FileSpec &target_definition_fspec) 440 { 441 ScriptInterpreter *interpreter = GetTarget().GetDebugger().GetCommandInterpreter().GetScriptInterpreter(); 442 Error error; 443 StructuredData::ObjectSP module_object_sp(interpreter->LoadPluginModule(target_definition_fspec, error)); 444 if (module_object_sp) 445 { 446 StructuredData::DictionarySP target_definition_sp( 447 interpreter->GetDynamicSettings(module_object_sp, &GetTarget(), "gdb-server-target-definition", error)); 448 449 if (target_definition_sp) 450 { 451 StructuredData::ObjectSP target_object(target_definition_sp->GetValueForKey("host-info")); 452 if (target_object) 453 { 454 if (auto host_info_dict = target_object->GetAsDictionary()) 455 { 456 StructuredData::ObjectSP triple_value = host_info_dict->GetValueForKey("triple"); 457 if (auto triple_string_value = triple_value->GetAsString()) 458 { 459 std::string triple_string = triple_string_value->GetValue(); 460 ArchSpec host_arch(triple_string.c_str()); 461 if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) 462 { 463 GetTarget().SetArchitecture(host_arch); 464 } 465 } 466 } 467 } 468 m_breakpoint_pc_offset = 0; 469 StructuredData::ObjectSP breakpoint_pc_offset_value = target_definition_sp->GetValueForKey("breakpoint-pc-offset"); 470 if (breakpoint_pc_offset_value) 471 { 472 if (auto breakpoint_pc_int_value = breakpoint_pc_offset_value->GetAsInteger()) 473 m_breakpoint_pc_offset = breakpoint_pc_int_value->GetValue(); 474 } 475 476 if (m_register_info.SetRegisterInfo(*target_definition_sp, GetTarget().GetArchitecture()) > 0) 477 { 478 return true; 479 } 480 } 481 } 482 return false; 483 } 484 485 static size_t 486 SplitCommaSeparatedRegisterNumberString(const llvm::StringRef &comma_separated_regiter_numbers, std::vector<uint32_t> ®nums, int base) 487 { 488 regnums.clear(); 489 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 490 value_pair.second = comma_separated_regiter_numbers; 491 do 492 { 493 value_pair = value_pair.second.split(','); 494 if (!value_pair.first.empty()) 495 { 496 uint32_t reg = StringConvert::ToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, base); 497 if (reg != LLDB_INVALID_REGNUM) 498 regnums.push_back (reg); 499 } 500 } while (!value_pair.second.empty()); 501 return regnums.size(); 502 } 503 504 505 void 506 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 507 { 508 if (!force && m_register_info.GetNumRegisters() > 0) 509 return; 510 511 m_register_info.Clear(); 512 513 // Check if qHostInfo specified a specific packet timeout for this connection. 514 // If so then lets update our setting so the user knows what the timeout is 515 // and can see it. 516 const uint32_t host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout(); 517 if (host_packet_timeout) 518 { 519 GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout); 520 } 521 522 // Register info search order: 523 // 1 - Use the target definition python file if one is specified. 524 // 2 - If the target definition doesn't have any of the info from the target.xml (registers) then proceed to read the target.xml. 525 // 3 - Fall back on the qRegisterInfo packets. 526 527 FileSpec target_definition_fspec = GetGlobalPluginProperties()->GetTargetDefinitionFile (); 528 if (target_definition_fspec) 529 { 530 // See if we can get register definitions from a python file 531 if (ParsePythonTargetDefinition (target_definition_fspec)) 532 return; 533 } 534 535 if (GetGDBServerRegisterInfo ()) 536 return; 537 538 char packet[128]; 539 uint32_t reg_offset = 0; 540 uint32_t reg_num = 0; 541 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 542 response_type == StringExtractorGDBRemote::eResponse; 543 ++reg_num) 544 { 545 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 546 assert (packet_len < (int)sizeof(packet)); 547 StringExtractorGDBRemote response; 548 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false) == GDBRemoteCommunication::PacketResult::Success) 549 { 550 response_type = response.GetResponseType(); 551 if (response_type == StringExtractorGDBRemote::eResponse) 552 { 553 std::string name; 554 std::string value; 555 ConstString reg_name; 556 ConstString alt_name; 557 ConstString set_name; 558 std::vector<uint32_t> value_regs; 559 std::vector<uint32_t> invalidate_regs; 560 RegisterInfo reg_info = { NULL, // Name 561 NULL, // Alt name 562 0, // byte size 563 reg_offset, // offset 564 eEncodingUint, // encoding 565 eFormatHex, // formate 566 { 567 LLDB_INVALID_REGNUM, // GCC reg num 568 LLDB_INVALID_REGNUM, // DWARF reg num 569 LLDB_INVALID_REGNUM, // generic reg num 570 reg_num, // GDB reg num 571 reg_num // native register number 572 }, 573 NULL, 574 NULL 575 }; 576 577 while (response.GetNameColonValue(name, value)) 578 { 579 if (name.compare("name") == 0) 580 { 581 reg_name.SetCString(value.c_str()); 582 } 583 else if (name.compare("alt-name") == 0) 584 { 585 alt_name.SetCString(value.c_str()); 586 } 587 else if (name.compare("bitsize") == 0) 588 { 589 reg_info.byte_size = StringConvert::ToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 590 } 591 else if (name.compare("offset") == 0) 592 { 593 uint32_t offset = StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0); 594 if (reg_offset != offset) 595 { 596 reg_offset = offset; 597 } 598 } 599 else if (name.compare("encoding") == 0) 600 { 601 const Encoding encoding = Args::StringToEncoding (value.c_str()); 602 if (encoding != eEncodingInvalid) 603 reg_info.encoding = encoding; 604 } 605 else if (name.compare("format") == 0) 606 { 607 Format format = eFormatInvalid; 608 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 609 reg_info.format = format; 610 else if (value.compare("binary") == 0) 611 reg_info.format = eFormatBinary; 612 else if (value.compare("decimal") == 0) 613 reg_info.format = eFormatDecimal; 614 else if (value.compare("hex") == 0) 615 reg_info.format = eFormatHex; 616 else if (value.compare("float") == 0) 617 reg_info.format = eFormatFloat; 618 else if (value.compare("vector-sint8") == 0) 619 reg_info.format = eFormatVectorOfSInt8; 620 else if (value.compare("vector-uint8") == 0) 621 reg_info.format = eFormatVectorOfUInt8; 622 else if (value.compare("vector-sint16") == 0) 623 reg_info.format = eFormatVectorOfSInt16; 624 else if (value.compare("vector-uint16") == 0) 625 reg_info.format = eFormatVectorOfUInt16; 626 else if (value.compare("vector-sint32") == 0) 627 reg_info.format = eFormatVectorOfSInt32; 628 else if (value.compare("vector-uint32") == 0) 629 reg_info.format = eFormatVectorOfUInt32; 630 else if (value.compare("vector-float32") == 0) 631 reg_info.format = eFormatVectorOfFloat32; 632 else if (value.compare("vector-uint128") == 0) 633 reg_info.format = eFormatVectorOfUInt128; 634 } 635 else if (name.compare("set") == 0) 636 { 637 set_name.SetCString(value.c_str()); 638 } 639 else if (name.compare("gcc") == 0) 640 { 641 reg_info.kinds[eRegisterKindGCC] = StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 642 } 643 else if (name.compare("dwarf") == 0) 644 { 645 reg_info.kinds[eRegisterKindDWARF] = StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 646 } 647 else if (name.compare("generic") == 0) 648 { 649 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 650 } 651 else if (name.compare("container-regs") == 0) 652 { 653 SplitCommaSeparatedRegisterNumberString(value, value_regs, 16); 654 } 655 else if (name.compare("invalidate-regs") == 0) 656 { 657 SplitCommaSeparatedRegisterNumberString(value, invalidate_regs, 16); 658 } 659 } 660 661 reg_info.byte_offset = reg_offset; 662 assert (reg_info.byte_size != 0); 663 reg_offset += reg_info.byte_size; 664 if (!value_regs.empty()) 665 { 666 value_regs.push_back(LLDB_INVALID_REGNUM); 667 reg_info.value_regs = value_regs.data(); 668 } 669 if (!invalidate_regs.empty()) 670 { 671 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 672 reg_info.invalidate_regs = invalidate_regs.data(); 673 } 674 675 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 676 } 677 else 678 { 679 break; // ensure exit before reg_num is incremented 680 } 681 } 682 else 683 { 684 break; 685 } 686 } 687 688 if (m_register_info.GetNumRegisters() > 0) 689 { 690 m_register_info.Finalize(GetTarget().GetArchitecture()); 691 return; 692 } 693 694 // We didn't get anything if the accumulated reg_num is zero. See if we are 695 // debugging ARM and fill with a hard coded register set until we can get an 696 // updated debugserver down on the devices. 697 // On the other hand, if the accumulated reg_num is positive, see if we can 698 // add composite registers to the existing primordial ones. 699 bool from_scratch = (m_register_info.GetNumRegisters() == 0); 700 701 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 702 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 703 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 704 705 // Use the process' architecture instead of the host arch, if available 706 ArchSpec remote_arch; 707 if (remote_process_arch.IsValid ()) 708 remote_arch = remote_process_arch; 709 else 710 remote_arch = remote_host_arch; 711 712 if (!target_arch.IsValid()) 713 { 714 if (remote_arch.IsValid() 715 && remote_arch.GetMachine() == llvm::Triple::arm 716 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 717 m_register_info.HardcodeARMRegisters(from_scratch); 718 } 719 else if (target_arch.GetMachine() == llvm::Triple::arm) 720 { 721 m_register_info.HardcodeARMRegisters(from_scratch); 722 } 723 724 // At this point, we can finalize our register info. 725 m_register_info.Finalize (GetTarget().GetArchitecture()); 726 } 727 728 Error 729 ProcessGDBRemote::WillLaunch (Module* module) 730 { 731 return WillLaunchOrAttach (); 732 } 733 734 Error 735 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 736 { 737 return WillLaunchOrAttach (); 738 } 739 740 Error 741 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 742 { 743 return WillLaunchOrAttach (); 744 } 745 746 Error 747 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 748 { 749 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 750 Error error (WillLaunchOrAttach ()); 751 752 if (error.Fail()) 753 return error; 754 755 error = ConnectToDebugserver (remote_url); 756 757 if (error.Fail()) 758 return error; 759 StartAsyncThread (); 760 761 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 762 if (pid == LLDB_INVALID_PROCESS_ID) 763 { 764 // We don't have a valid process ID, so note that we are connected 765 // and could now request to launch or attach, or get remote process 766 // listings... 767 SetPrivateState (eStateConnected); 768 } 769 else 770 { 771 // We have a valid process 772 SetID (pid); 773 GetThreadList(); 774 StringExtractorGDBRemote response; 775 if (m_gdb_comm.GetStopReply(response)) 776 { 777 SetLastStopPacket(response); 778 779 // '?' Packets must be handled differently in non-stop mode 780 if (GetTarget().GetNonStopModeEnabled()) 781 HandleStopReplySequence(); 782 783 if (!m_target.GetArchitecture().IsValid()) 784 { 785 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 786 { 787 m_target.SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 788 } 789 else 790 { 791 m_target.SetArchitecture(m_gdb_comm.GetHostArchitecture()); 792 } 793 } 794 795 const StateType state = SetThreadStopInfo (response); 796 if (state != eStateInvalid) 797 { 798 SetPrivateState (state); 799 } 800 else 801 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 802 } 803 else 804 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 805 } 806 807 if (log) 808 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"); 809 810 811 if (error.Success() 812 && !GetTarget().GetArchitecture().IsValid() 813 && m_gdb_comm.GetHostArchitecture().IsValid()) 814 { 815 // Prefer the *process'* architecture over that of the *host*, if available. 816 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 817 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 818 else 819 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 820 } 821 822 if (log) 823 log->Printf ("ProcessGDBRemote::%s pid %" PRIu64 ": normalized target architecture triple: %s", __FUNCTION__, GetID (), GetTarget ().GetArchitecture ().GetTriple ().getTriple ().c_str ()); 824 825 if (error.Success()) 826 { 827 PlatformSP platform_sp = GetTarget().GetPlatform(); 828 if (platform_sp && platform_sp->IsConnected()) 829 SetUnixSignals(platform_sp->GetUnixSignals()); 830 else 831 SetUnixSignals(UnixSignals::Create(GetTarget().GetArchitecture())); 832 } 833 834 return error; 835 } 836 837 Error 838 ProcessGDBRemote::WillLaunchOrAttach () 839 { 840 Error error; 841 m_stdio_communication.Clear (); 842 return error; 843 } 844 845 //---------------------------------------------------------------------- 846 // Process Control 847 //---------------------------------------------------------------------- 848 Error 849 ProcessGDBRemote::DoLaunch (Module *exe_module, ProcessLaunchInfo &launch_info) 850 { 851 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 852 Error error; 853 854 if (log) 855 log->Printf ("ProcessGDBRemote::%s() entered", __FUNCTION__); 856 857 uint32_t launch_flags = launch_info.GetFlags().Get(); 858 FileSpec stdin_file_spec{}; 859 FileSpec stdout_file_spec{}; 860 FileSpec stderr_file_spec{}; 861 FileSpec working_dir = launch_info.GetWorkingDirectory(); 862 863 const FileAction *file_action; 864 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 865 if (file_action) 866 { 867 if (file_action->GetAction() == FileAction::eFileActionOpen) 868 stdin_file_spec = file_action->GetFileSpec(); 869 } 870 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 871 if (file_action) 872 { 873 if (file_action->GetAction() == FileAction::eFileActionOpen) 874 stdout_file_spec = file_action->GetFileSpec(); 875 } 876 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 877 if (file_action) 878 { 879 if (file_action->GetAction() == FileAction::eFileActionOpen) 880 stderr_file_spec = file_action->GetFileSpec(); 881 } 882 883 if (log) 884 { 885 if (stdin_file_spec || stdout_file_spec || stderr_file_spec) 886 log->Printf ("ProcessGDBRemote::%s provided with STDIO paths via launch_info: stdin=%s, stdout=%s, stderr=%s", 887 __FUNCTION__, 888 stdin_file_spec ? stdin_file_spec.GetCString() : "<null>", 889 stdout_file_spec ? stdout_file_spec.GetCString() : "<null>", 890 stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"); 891 else 892 log->Printf ("ProcessGDBRemote::%s no STDIO paths given via launch_info", __FUNCTION__); 893 } 894 895 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 896 if (stdin_file_spec || disable_stdio) 897 { 898 // the inferior will be reading stdin from the specified file 899 // or stdio is completely disabled 900 m_stdin_forward = false; 901 } 902 else 903 { 904 m_stdin_forward = true; 905 } 906 907 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 908 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 909 // ::LogSetLogFile ("/dev/stdout"); 910 911 ObjectFile * object_file = exe_module->GetObjectFile(); 912 if (object_file) 913 { 914 // Make sure we aren't already connected? 915 if (!m_gdb_comm.IsConnected()) 916 { 917 error = LaunchAndConnectToDebugserver (launch_info); 918 } 919 920 if (error.Success()) 921 { 922 lldb_utility::PseudoTerminal pty; 923 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 924 925 PlatformSP platform_sp (m_target.GetPlatform()); 926 if (disable_stdio) 927 { 928 // set to /dev/null unless redirected to a file above 929 if (!stdin_file_spec) 930 stdin_file_spec.SetFile("/dev/null", false); 931 if (!stdout_file_spec) 932 stdout_file_spec.SetFile("/dev/null", false); 933 if (!stderr_file_spec) 934 stderr_file_spec.SetFile("/dev/null", false); 935 } 936 else if (platform_sp && platform_sp->IsHost()) 937 { 938 // If the debugserver is local and we aren't disabling STDIO, lets use 939 // a pseudo terminal to instead of relying on the 'O' packets for stdio 940 // since 'O' packets can really slow down debugging if the inferior 941 // does a lot of output. 942 if ((!stdin_file_spec || !stdout_file_spec || !stderr_file_spec) && 943 pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 944 { 945 FileSpec slave_name{pty.GetSlaveName(NULL, 0), false}; 946 947 if (!stdin_file_spec) 948 stdin_file_spec = slave_name; 949 950 if (!stdout_file_spec) 951 stdout_file_spec = slave_name; 952 953 if (!stderr_file_spec) 954 stderr_file_spec = slave_name; 955 } 956 if (log) 957 log->Printf ("ProcessGDBRemote::%s adjusted STDIO paths for local platform (IsHost() is true) using slave: stdin=%s, stdout=%s, stderr=%s", 958 __FUNCTION__, 959 stdin_file_spec ? stdin_file_spec.GetCString() : "<null>", 960 stdout_file_spec ? stdout_file_spec.GetCString() : "<null>", 961 stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"); 962 } 963 964 if (log) 965 log->Printf ("ProcessGDBRemote::%s final STDIO paths after all adjustments: stdin=%s, stdout=%s, stderr=%s", 966 __FUNCTION__, 967 stdin_file_spec ? stdin_file_spec.GetCString() : "<null>", 968 stdout_file_spec ? stdout_file_spec.GetCString() : "<null>", 969 stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"); 970 971 if (stdin_file_spec) 972 m_gdb_comm.SetSTDIN(stdin_file_spec); 973 if (stdout_file_spec) 974 m_gdb_comm.SetSTDOUT(stdout_file_spec); 975 if (stderr_file_spec) 976 m_gdb_comm.SetSTDERR(stderr_file_spec); 977 978 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 979 m_gdb_comm.SetDetachOnError (launch_flags & eLaunchFlagDetachOnError); 980 981 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 982 983 const char * launch_event_data = launch_info.GetLaunchEventData(); 984 if (launch_event_data != NULL && *launch_event_data != '\0') 985 m_gdb_comm.SendLaunchEventDataPacket (launch_event_data); 986 987 if (working_dir) 988 { 989 m_gdb_comm.SetWorkingDir (working_dir); 990 } 991 992 // Send the environment and the program + arguments after we connect 993 const Args &environment = launch_info.GetEnvironmentEntries(); 994 if (environment.GetArgumentCount()) 995 { 996 size_t num_environment_entries = environment.GetArgumentCount(); 997 for (size_t i=0; i<num_environment_entries; ++i) 998 { 999 const char *env_entry = environment.GetArgumentAtIndex(i); 1000 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 1001 break; 1002 } 1003 } 1004 1005 { 1006 // Scope for the scoped timeout object 1007 GDBRemoteCommunication::ScopedTimeout timeout (m_gdb_comm, 10); 1008 1009 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info); 1010 if (arg_packet_err == 0) 1011 { 1012 std::string error_str; 1013 if (m_gdb_comm.GetLaunchSuccess (error_str)) 1014 { 1015 SetID (m_gdb_comm.GetCurrentProcessID ()); 1016 } 1017 else 1018 { 1019 error.SetErrorString (error_str.c_str()); 1020 } 1021 } 1022 else 1023 { 1024 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 1025 } 1026 } 1027 1028 if (GetID() == LLDB_INVALID_PROCESS_ID) 1029 { 1030 if (log) 1031 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 1032 KillDebugserverProcess (); 1033 return error; 1034 } 1035 1036 StringExtractorGDBRemote response; 1037 if (m_gdb_comm.GetStopReply(response)) 1038 { 1039 SetLastStopPacket(response); 1040 // '?' Packets must be handled differently in non-stop mode 1041 if (GetTarget().GetNonStopModeEnabled()) 1042 HandleStopReplySequence(); 1043 1044 const ArchSpec &process_arch = m_gdb_comm.GetProcessArchitecture(); 1045 1046 if (process_arch.IsValid()) 1047 { 1048 m_target.MergeArchitecture(process_arch); 1049 } 1050 else 1051 { 1052 const ArchSpec &host_arch = m_gdb_comm.GetHostArchitecture(); 1053 if (host_arch.IsValid()) 1054 m_target.MergeArchitecture(host_arch); 1055 } 1056 1057 SetPrivateState (SetThreadStopInfo (response)); 1058 1059 if (!disable_stdio) 1060 { 1061 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 1062 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 1063 } 1064 } 1065 } 1066 else 1067 { 1068 if (log) 1069 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 1070 } 1071 } 1072 else 1073 { 1074 // Set our user ID to an invalid process ID. 1075 SetID(LLDB_INVALID_PROCESS_ID); 1076 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 1077 exe_module->GetFileSpec().GetFilename().AsCString(), 1078 exe_module->GetArchitecture().GetArchitectureName()); 1079 } 1080 return error; 1081 1082 } 1083 1084 1085 Error 1086 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 1087 { 1088 Error error; 1089 // Only connect if we have a valid connect URL 1090 Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1091 1092 if (connect_url && connect_url[0]) 1093 { 1094 if (log) 1095 log->Printf("ProcessGDBRemote::%s Connecting to %s", __FUNCTION__, connect_url); 1096 std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 1097 if (conn_ap.get()) 1098 { 1099 const uint32_t max_retry_count = 50; 1100 uint32_t retry_count = 0; 1101 while (!m_gdb_comm.IsConnected()) 1102 { 1103 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 1104 { 1105 m_gdb_comm.SetConnection (conn_ap.release()); 1106 break; 1107 } 1108 else if (error.WasInterrupted()) 1109 { 1110 // If we were interrupted, don't keep retrying. 1111 break; 1112 } 1113 1114 retry_count++; 1115 1116 if (retry_count >= max_retry_count) 1117 break; 1118 1119 usleep (100000); 1120 } 1121 } 1122 } 1123 1124 if (!m_gdb_comm.IsConnected()) 1125 { 1126 if (error.Success()) 1127 error.SetErrorString("not connected to remote gdb server"); 1128 return error; 1129 } 1130 1131 1132 // Start the communications read thread so all incoming data can be 1133 // parsed into packets and queued as they arrive. 1134 if (GetTarget().GetNonStopModeEnabled()) 1135 m_gdb_comm.StartReadThread(); 1136 1137 // We always seem to be able to open a connection to a local port 1138 // so we need to make sure we can then send data to it. If we can't 1139 // then we aren't actually connected to anything, so try and do the 1140 // handshake with the remote GDB server and make sure that goes 1141 // alright. 1142 if (!m_gdb_comm.HandshakeWithServer (&error)) 1143 { 1144 m_gdb_comm.Disconnect(); 1145 if (error.Success()) 1146 error.SetErrorString("not connected to remote gdb server"); 1147 return error; 1148 } 1149 1150 // Send $QNonStop:1 packet on startup if required 1151 if (GetTarget().GetNonStopModeEnabled()) 1152 GetTarget().SetNonStopModeEnabled (m_gdb_comm.SetNonStopMode(true)); 1153 1154 m_gdb_comm.GetEchoSupported (); 1155 m_gdb_comm.GetThreadSuffixSupported (); 1156 m_gdb_comm.GetListThreadsInStopReplySupported (); 1157 m_gdb_comm.GetHostInfo (); 1158 m_gdb_comm.GetVContSupported ('c'); 1159 m_gdb_comm.GetVAttachOrWaitSupported(); 1160 1161 // Ask the remote server for the default thread id 1162 if (GetTarget().GetNonStopModeEnabled()) 1163 m_gdb_comm.GetDefaultThreadId(m_initial_tid); 1164 1165 1166 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 1167 for (size_t idx = 0; idx < num_cmds; idx++) 1168 { 1169 StringExtractorGDBRemote response; 1170 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 1171 } 1172 return error; 1173 } 1174 1175 void 1176 ProcessGDBRemote::DidLaunchOrAttach (ArchSpec& process_arch) 1177 { 1178 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1179 if (log) 1180 log->Printf ("ProcessGDBRemote::DidLaunch()"); 1181 if (GetID() != LLDB_INVALID_PROCESS_ID) 1182 { 1183 BuildDynamicRegisterInfo (false); 1184 1185 // See if the GDB server supports the qHostInfo information 1186 1187 1188 // See if the GDB server supports the qProcessInfo packet, if so 1189 // prefer that over the Host information as it will be more specific 1190 // to our process. 1191 1192 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 1193 if (remote_process_arch.IsValid()) 1194 { 1195 process_arch = remote_process_arch; 1196 if (log) 1197 log->Printf ("ProcessGDBRemote::%s gdb-remote had process architecture, using %s %s", 1198 __FUNCTION__, 1199 process_arch.GetArchitectureName () ? process_arch.GetArchitectureName () : "<null>", 1200 process_arch.GetTriple().getTriple ().c_str() ? process_arch.GetTriple().getTriple ().c_str() : "<null>"); 1201 } 1202 else 1203 { 1204 process_arch = m_gdb_comm.GetHostArchitecture(); 1205 if (log) 1206 log->Printf ("ProcessGDBRemote::%s gdb-remote did not have process architecture, using gdb-remote host architecture %s %s", 1207 __FUNCTION__, 1208 process_arch.GetArchitectureName () ? process_arch.GetArchitectureName () : "<null>", 1209 process_arch.GetTriple().getTriple ().c_str() ? process_arch.GetTriple().getTriple ().c_str() : "<null>"); 1210 } 1211 1212 if (process_arch.IsValid()) 1213 { 1214 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 1215 if (target_arch.IsValid()) 1216 { 1217 if (log) 1218 log->Printf ("ProcessGDBRemote::%s analyzing target arch, currently %s %s", 1219 __FUNCTION__, 1220 target_arch.GetArchitectureName () ? target_arch.GetArchitectureName () : "<null>", 1221 target_arch.GetTriple().getTriple ().c_str() ? target_arch.GetTriple().getTriple ().c_str() : "<null>"); 1222 1223 // If the remote host is ARM and we have apple as the vendor, then 1224 // ARM executables and shared libraries can have mixed ARM architectures. 1225 // You can have an armv6 executable, and if the host is armv7, then the 1226 // system will load the best possible architecture for all shared libraries 1227 // it has, so we really need to take the remote host architecture as our 1228 // defacto architecture in this case. 1229 1230 if (process_arch.GetMachine() == llvm::Triple::arm && 1231 process_arch.GetTriple().getVendor() == llvm::Triple::Apple) 1232 { 1233 GetTarget().SetArchitecture (process_arch); 1234 if (log) 1235 log->Printf ("ProcessGDBRemote::%s remote process is ARM/Apple, setting target arch to %s %s", 1236 __FUNCTION__, 1237 process_arch.GetArchitectureName () ? process_arch.GetArchitectureName () : "<null>", 1238 process_arch.GetTriple().getTriple ().c_str() ? process_arch.GetTriple().getTriple ().c_str() : "<null>"); 1239 } 1240 else 1241 { 1242 // Fill in what is missing in the triple 1243 const llvm::Triple &remote_triple = process_arch.GetTriple(); 1244 llvm::Triple new_target_triple = target_arch.GetTriple(); 1245 if (new_target_triple.getVendorName().size() == 0) 1246 { 1247 new_target_triple.setVendor (remote_triple.getVendor()); 1248 1249 if (new_target_triple.getOSName().size() == 0) 1250 { 1251 new_target_triple.setOS (remote_triple.getOS()); 1252 1253 if (new_target_triple.getEnvironmentName().size() == 0) 1254 new_target_triple.setEnvironment (remote_triple.getEnvironment()); 1255 } 1256 1257 ArchSpec new_target_arch = target_arch; 1258 new_target_arch.SetTriple(new_target_triple); 1259 GetTarget().SetArchitecture(new_target_arch); 1260 } 1261 } 1262 1263 if (log) 1264 log->Printf ("ProcessGDBRemote::%s final target arch after adjustments for remote architecture: %s %s", 1265 __FUNCTION__, 1266 target_arch.GetArchitectureName () ? target_arch.GetArchitectureName () : "<null>", 1267 target_arch.GetTriple().getTriple ().c_str() ? target_arch.GetTriple().getTriple ().c_str() : "<null>"); 1268 } 1269 else 1270 { 1271 // The target doesn't have a valid architecture yet, set it from 1272 // the architecture we got from the remote GDB server 1273 GetTarget().SetArchitecture (process_arch); 1274 } 1275 } 1276 } 1277 } 1278 1279 void 1280 ProcessGDBRemote::DidLaunch () 1281 { 1282 ArchSpec process_arch; 1283 DidLaunchOrAttach (process_arch); 1284 } 1285 1286 Error 1287 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 1288 { 1289 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1290 Error error; 1291 1292 if (log) 1293 log->Printf ("ProcessGDBRemote::%s()", __FUNCTION__); 1294 1295 // Clear out and clean up from any current state 1296 Clear(); 1297 if (attach_pid != LLDB_INVALID_PROCESS_ID) 1298 { 1299 // Make sure we aren't already connected? 1300 if (!m_gdb_comm.IsConnected()) 1301 { 1302 error = LaunchAndConnectToDebugserver (attach_info); 1303 1304 if (error.Fail()) 1305 { 1306 const char *error_string = error.AsCString(); 1307 if (error_string == NULL) 1308 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1309 1310 SetExitStatus (-1, error_string); 1311 } 1312 } 1313 1314 if (error.Success()) 1315 { 1316 m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); 1317 1318 char packet[64]; 1319 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 1320 SetID (attach_pid); 1321 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 1322 } 1323 } 1324 1325 return error; 1326 } 1327 1328 Error 1329 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, const ProcessAttachInfo &attach_info) 1330 { 1331 Error error; 1332 // Clear out and clean up from any current state 1333 Clear(); 1334 1335 if (process_name && process_name[0]) 1336 { 1337 // Make sure we aren't already connected? 1338 if (!m_gdb_comm.IsConnected()) 1339 { 1340 error = LaunchAndConnectToDebugserver (attach_info); 1341 1342 if (error.Fail()) 1343 { 1344 const char *error_string = error.AsCString(); 1345 if (error_string == NULL) 1346 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1347 1348 SetExitStatus (-1, error_string); 1349 } 1350 } 1351 1352 if (error.Success()) 1353 { 1354 StreamString packet; 1355 1356 m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError()); 1357 1358 if (attach_info.GetWaitForLaunch()) 1359 { 1360 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1361 { 1362 packet.PutCString ("vAttachWait"); 1363 } 1364 else 1365 { 1366 if (attach_info.GetIgnoreExisting()) 1367 packet.PutCString("vAttachWait"); 1368 else 1369 packet.PutCString ("vAttachOrWait"); 1370 } 1371 } 1372 else 1373 packet.PutCString("vAttachName"); 1374 packet.PutChar(';'); 1375 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1376 1377 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1378 1379 } 1380 } 1381 return error; 1382 } 1383 1384 void 1385 ProcessGDBRemote::DidExit () 1386 { 1387 // When we exit, disconnect from the GDB server communications 1388 m_gdb_comm.Disconnect(); 1389 } 1390 1391 void 1392 ProcessGDBRemote::DidAttach (ArchSpec &process_arch) 1393 { 1394 // If you can figure out what the architecture is, fill it in here. 1395 process_arch.Clear(); 1396 DidLaunchOrAttach (process_arch); 1397 } 1398 1399 1400 Error 1401 ProcessGDBRemote::WillResume () 1402 { 1403 m_continue_c_tids.clear(); 1404 m_continue_C_tids.clear(); 1405 m_continue_s_tids.clear(); 1406 m_continue_S_tids.clear(); 1407 m_jstopinfo_sp.reset(); 1408 m_jthreadsinfo_sp.reset(); 1409 return Error(); 1410 } 1411 1412 Error 1413 ProcessGDBRemote::DoResume () 1414 { 1415 Error error; 1416 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1417 if (log) 1418 log->Printf ("ProcessGDBRemote::Resume()"); 1419 1420 Listener listener ("gdb-remote.resume-packet-sent"); 1421 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1422 { 1423 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1424 1425 const size_t num_threads = GetThreadList().GetSize(); 1426 1427 StreamString continue_packet; 1428 bool continue_packet_error = false; 1429 if (m_gdb_comm.HasAnyVContSupport ()) 1430 { 1431 if (!GetTarget().GetNonStopModeEnabled() && 1432 (m_continue_c_tids.size() == num_threads || 1433 (m_continue_c_tids.empty() && 1434 m_continue_C_tids.empty() && 1435 m_continue_s_tids.empty() && 1436 m_continue_S_tids.empty()))) 1437 { 1438 // All threads are continuing, just send a "c" packet 1439 continue_packet.PutCString ("c"); 1440 } 1441 else 1442 { 1443 continue_packet.PutCString ("vCont"); 1444 1445 if (!m_continue_c_tids.empty()) 1446 { 1447 if (m_gdb_comm.GetVContSupported ('c')) 1448 { 1449 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) 1450 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1451 } 1452 else 1453 continue_packet_error = true; 1454 } 1455 1456 if (!continue_packet_error && !m_continue_C_tids.empty()) 1457 { 1458 if (m_gdb_comm.GetVContSupported ('C')) 1459 { 1460 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) 1461 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1462 } 1463 else 1464 continue_packet_error = true; 1465 } 1466 1467 if (!continue_packet_error && !m_continue_s_tids.empty()) 1468 { 1469 if (m_gdb_comm.GetVContSupported ('s')) 1470 { 1471 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) 1472 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1473 } 1474 else 1475 continue_packet_error = true; 1476 } 1477 1478 if (!continue_packet_error && !m_continue_S_tids.empty()) 1479 { 1480 if (m_gdb_comm.GetVContSupported ('S')) 1481 { 1482 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) 1483 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1484 } 1485 else 1486 continue_packet_error = true; 1487 } 1488 1489 if (continue_packet_error) 1490 continue_packet.GetString().clear(); 1491 } 1492 } 1493 else 1494 continue_packet_error = true; 1495 1496 if (continue_packet_error) 1497 { 1498 // Either no vCont support, or we tried to use part of the vCont 1499 // packet that wasn't supported by the remote GDB server. 1500 // We need to try and make a simple packet that can do our continue 1501 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1502 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1503 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1504 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1505 if (num_continue_c_tids > 0) 1506 { 1507 if (num_continue_c_tids == num_threads) 1508 { 1509 // All threads are resuming... 1510 m_gdb_comm.SetCurrentThreadForRun (-1); 1511 continue_packet.PutChar ('c'); 1512 continue_packet_error = false; 1513 } 1514 else if (num_continue_c_tids == 1 && 1515 num_continue_C_tids == 0 && 1516 num_continue_s_tids == 0 && 1517 num_continue_S_tids == 0 ) 1518 { 1519 // Only one thread is continuing 1520 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1521 continue_packet.PutChar ('c'); 1522 continue_packet_error = false; 1523 } 1524 } 1525 1526 if (continue_packet_error && num_continue_C_tids > 0) 1527 { 1528 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1529 num_continue_C_tids > 0 && 1530 num_continue_s_tids == 0 && 1531 num_continue_S_tids == 0 ) 1532 { 1533 const int continue_signo = m_continue_C_tids.front().second; 1534 // Only one thread is continuing 1535 if (num_continue_C_tids > 1) 1536 { 1537 // More that one thread with a signal, yet we don't have 1538 // vCont support and we are being asked to resume each 1539 // thread with a signal, we need to make sure they are 1540 // all the same signal, or we can't issue the continue 1541 // accurately with the current support... 1542 if (num_continue_C_tids > 1) 1543 { 1544 continue_packet_error = false; 1545 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1546 { 1547 if (m_continue_C_tids[i].second != continue_signo) 1548 continue_packet_error = true; 1549 } 1550 } 1551 if (!continue_packet_error) 1552 m_gdb_comm.SetCurrentThreadForRun (-1); 1553 } 1554 else 1555 { 1556 // Set the continue thread ID 1557 continue_packet_error = false; 1558 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1559 } 1560 if (!continue_packet_error) 1561 { 1562 // Add threads continuing with the same signo... 1563 continue_packet.Printf("C%2.2x", continue_signo); 1564 } 1565 } 1566 } 1567 1568 if (continue_packet_error && num_continue_s_tids > 0) 1569 { 1570 if (num_continue_s_tids == num_threads) 1571 { 1572 // All threads are resuming... 1573 m_gdb_comm.SetCurrentThreadForRun (-1); 1574 1575 // If in Non-Stop-Mode use vCont when stepping 1576 if (GetTarget().GetNonStopModeEnabled()) 1577 { 1578 if (m_gdb_comm.GetVContSupported('s')) 1579 continue_packet.PutCString("vCont;s"); 1580 else 1581 continue_packet.PutChar('s'); 1582 } 1583 else 1584 continue_packet.PutChar('s'); 1585 1586 continue_packet_error = false; 1587 } 1588 else if (num_continue_c_tids == 0 && 1589 num_continue_C_tids == 0 && 1590 num_continue_s_tids == 1 && 1591 num_continue_S_tids == 0 ) 1592 { 1593 // Only one thread is stepping 1594 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1595 continue_packet.PutChar ('s'); 1596 continue_packet_error = false; 1597 } 1598 } 1599 1600 if (!continue_packet_error && num_continue_S_tids > 0) 1601 { 1602 if (num_continue_S_tids == num_threads) 1603 { 1604 const int step_signo = m_continue_S_tids.front().second; 1605 // Are all threads trying to step with the same signal? 1606 continue_packet_error = false; 1607 if (num_continue_S_tids > 1) 1608 { 1609 for (size_t i=1; i<num_threads; ++i) 1610 { 1611 if (m_continue_S_tids[i].second != step_signo) 1612 continue_packet_error = true; 1613 } 1614 } 1615 if (!continue_packet_error) 1616 { 1617 // Add threads stepping with the same signo... 1618 m_gdb_comm.SetCurrentThreadForRun (-1); 1619 continue_packet.Printf("S%2.2x", step_signo); 1620 } 1621 } 1622 else if (num_continue_c_tids == 0 && 1623 num_continue_C_tids == 0 && 1624 num_continue_s_tids == 0 && 1625 num_continue_S_tids == 1 ) 1626 { 1627 // Only one thread is stepping with signal 1628 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1629 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1630 continue_packet_error = false; 1631 } 1632 } 1633 } 1634 1635 if (continue_packet_error) 1636 { 1637 error.SetErrorString ("can't make continue packet for this resume"); 1638 } 1639 else 1640 { 1641 EventSP event_sp; 1642 TimeValue timeout; 1643 timeout = TimeValue::Now(); 1644 timeout.OffsetWithSeconds (5); 1645 if (!m_async_thread.IsJoinable()) 1646 { 1647 error.SetErrorString ("Trying to resume but the async thread is dead."); 1648 if (log) 1649 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1650 return error; 1651 } 1652 1653 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1654 1655 if (listener.WaitForEvent (&timeout, event_sp) == false) 1656 { 1657 error.SetErrorString("Resume timed out."); 1658 if (log) 1659 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1660 } 1661 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1662 { 1663 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1664 if (log) 1665 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1666 return error; 1667 } 1668 } 1669 } 1670 1671 return error; 1672 } 1673 1674 void 1675 ProcessGDBRemote::HandleStopReplySequence () 1676 { 1677 while(true) 1678 { 1679 // Send vStopped 1680 StringExtractorGDBRemote response; 1681 m_gdb_comm.SendPacketAndWaitForResponse("vStopped", response, false); 1682 1683 // OK represents end of signal list 1684 if (response.IsOKResponse()) 1685 break; 1686 1687 // If not OK or a normal packet we have a problem 1688 if (!response.IsNormalResponse()) 1689 break; 1690 1691 SetLastStopPacket(response); 1692 } 1693 } 1694 1695 void 1696 ProcessGDBRemote::ClearThreadIDList () 1697 { 1698 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1699 m_thread_ids.clear(); 1700 } 1701 1702 size_t 1703 ProcessGDBRemote::UpdateThreadIDsFromStopReplyThreadsValue (std::string &value) 1704 { 1705 m_thread_ids.clear(); 1706 size_t comma_pos; 1707 lldb::tid_t tid; 1708 while ((comma_pos = value.find(',')) != std::string::npos) 1709 { 1710 value[comma_pos] = '\0'; 1711 // thread in big endian hex 1712 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1713 if (tid != LLDB_INVALID_THREAD_ID) 1714 m_thread_ids.push_back (tid); 1715 value.erase(0, comma_pos + 1); 1716 } 1717 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1718 if (tid != LLDB_INVALID_THREAD_ID) 1719 m_thread_ids.push_back (tid); 1720 return m_thread_ids.size(); 1721 } 1722 1723 bool 1724 ProcessGDBRemote::UpdateThreadIDList () 1725 { 1726 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1727 1728 if (m_jthreadsinfo_sp) 1729 { 1730 // If we have the JSON threads info, we can get the thread list from that 1731 StructuredData::Array *thread_infos = m_jthreadsinfo_sp->GetAsArray(); 1732 if (thread_infos && thread_infos->GetSize() > 0) 1733 { 1734 m_thread_ids.clear(); 1735 thread_infos->ForEach([this](StructuredData::Object* object) -> bool { 1736 StructuredData::Dictionary *thread_dict = object->GetAsDictionary(); 1737 if (thread_dict) 1738 { 1739 // Set the thread stop info from the JSON dictionary 1740 SetThreadStopInfo (thread_dict); 1741 lldb::tid_t tid = LLDB_INVALID_THREAD_ID; 1742 if (thread_dict->GetValueForKeyAsInteger<lldb::tid_t>("tid", tid)) 1743 m_thread_ids.push_back(tid); 1744 } 1745 return true; // Keep iterating through all thread_info objects 1746 }); 1747 } 1748 if (!m_thread_ids.empty()) 1749 return true; 1750 } 1751 else 1752 { 1753 // See if we can get the thread IDs from the current stop reply packets 1754 // that might contain a "threads" key/value pair 1755 1756 // Lock the thread stack while we access it 1757 Mutex::Locker stop_stack_lock(m_last_stop_packet_mutex); 1758 // Get the number of stop packets on the stack 1759 int nItems = m_stop_packet_stack.size(); 1760 // Iterate over them 1761 for (int i = 0; i < nItems; i++) 1762 { 1763 // Get the thread stop info 1764 StringExtractorGDBRemote &stop_info = m_stop_packet_stack[i]; 1765 const std::string &stop_info_str = stop_info.GetStringRef(); 1766 const size_t threads_pos = stop_info_str.find(";threads:"); 1767 if (threads_pos != std::string::npos) 1768 { 1769 const size_t start = threads_pos + strlen(";threads:"); 1770 const size_t end = stop_info_str.find(';', start); 1771 if (end != std::string::npos) 1772 { 1773 std::string value = stop_info_str.substr(start, end - start); 1774 if (UpdateThreadIDsFromStopReplyThreadsValue(value)) 1775 return true; 1776 } 1777 } 1778 } 1779 } 1780 1781 bool sequence_mutex_unavailable = false; 1782 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1783 if (sequence_mutex_unavailable) 1784 { 1785 return false; // We just didn't get the list 1786 } 1787 return true; 1788 } 1789 1790 bool 1791 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1792 { 1793 // locker will keep a mutex locked until it goes out of scope 1794 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1795 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1796 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1797 1798 size_t num_thread_ids = m_thread_ids.size(); 1799 // The "m_thread_ids" thread ID list should always be updated after each stop 1800 // reply packet, but in case it isn't, update it here. 1801 if (num_thread_ids == 0) 1802 { 1803 if (!UpdateThreadIDList ()) 1804 return false; 1805 num_thread_ids = m_thread_ids.size(); 1806 } 1807 1808 ThreadList old_thread_list_copy(old_thread_list); 1809 if (num_thread_ids > 0) 1810 { 1811 for (size_t i=0; i<num_thread_ids; ++i) 1812 { 1813 tid_t tid = m_thread_ids[i]; 1814 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1815 if (!thread_sp) 1816 { 1817 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1818 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1819 log->Printf( 1820 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1821 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1822 thread_sp->GetID()); 1823 } 1824 else 1825 { 1826 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1827 log->Printf( 1828 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1829 __FUNCTION__, static_cast<void*>(thread_sp.get()), 1830 thread_sp->GetID()); 1831 } 1832 new_thread_list.AddThread(thread_sp); 1833 } 1834 } 1835 1836 // Whatever that is left in old_thread_list_copy are not 1837 // present in new_thread_list. Remove non-existent threads from internal id table. 1838 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1839 for (size_t i=0; i<old_num_thread_ids; i++) 1840 { 1841 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1842 if (old_thread_sp) 1843 { 1844 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1845 m_thread_id_to_index_id_map.erase(old_thread_id); 1846 } 1847 } 1848 1849 return true; 1850 } 1851 1852 1853 bool 1854 ProcessGDBRemote::GetThreadStopInfoFromJSON (ThreadGDBRemote *thread, const StructuredData::ObjectSP &thread_infos_sp) 1855 { 1856 // See if we got thread stop infos for all threads via the "jThreadsInfo" packet 1857 if (thread_infos_sp) 1858 { 1859 StructuredData::Array *thread_infos = thread_infos_sp->GetAsArray(); 1860 if (thread_infos) 1861 { 1862 lldb::tid_t tid; 1863 const size_t n = thread_infos->GetSize(); 1864 for (size_t i=0; i<n; ++i) 1865 { 1866 StructuredData::Dictionary *thread_dict = thread_infos->GetItemAtIndex(i)->GetAsDictionary(); 1867 if (thread_dict) 1868 { 1869 if (thread_dict->GetValueForKeyAsInteger<lldb::tid_t>("tid", tid, LLDB_INVALID_THREAD_ID)) 1870 { 1871 if (tid == thread->GetID()) 1872 return (bool)SetThreadStopInfo(thread_dict); 1873 } 1874 } 1875 } 1876 } 1877 } 1878 return false; 1879 } 1880 1881 bool 1882 ProcessGDBRemote::CalculateThreadStopInfo (ThreadGDBRemote *thread) 1883 { 1884 // See if we got thread stop infos for all threads via the "jThreadsInfo" packet 1885 if (GetThreadStopInfoFromJSON (thread, m_jthreadsinfo_sp)) 1886 return true; 1887 1888 // See if we got thread stop info for any threads valid stop info reasons threads 1889 // via the "jstopinfo" packet stop reply packet key/value pair? 1890 if (m_jstopinfo_sp) 1891 { 1892 // If we have "jstopinfo" then we have stop descriptions for all threads 1893 // that have stop reasons, and if there is no entry for a thread, then 1894 // it has no stop reason. 1895 thread->GetRegisterContext()->InvalidateIfNeeded(true); 1896 if (!GetThreadStopInfoFromJSON (thread, m_jstopinfo_sp)) 1897 { 1898 thread->SetStopInfo (StopInfoSP()); 1899 } 1900 return true; 1901 } 1902 1903 // Fall back to using the qThreadStopInfo packet 1904 StringExtractorGDBRemote stop_packet; 1905 if (GetGDBRemote().GetThreadStopInfo(thread->GetProtocolID(), stop_packet)) 1906 return SetThreadStopInfo (stop_packet) == eStateStopped; 1907 return false; 1908 } 1909 1910 1911 ThreadSP 1912 ProcessGDBRemote::SetThreadStopInfo (lldb::tid_t tid, 1913 ExpeditedRegisterMap &expedited_register_map, 1914 uint8_t signo, 1915 const std::string &thread_name, 1916 const std::string &reason, 1917 const std::string &description, 1918 uint32_t exc_type, 1919 const std::vector<addr_t> &exc_data, 1920 addr_t thread_dispatch_qaddr, 1921 bool queue_vars_valid, // Set to true if queue_name, queue_kind and queue_serial are valid 1922 std::string &queue_name, 1923 QueueKind queue_kind, 1924 uint64_t queue_serial) 1925 { 1926 ThreadSP thread_sp; 1927 if (tid != LLDB_INVALID_THREAD_ID) 1928 { 1929 // Scope for "locker" below 1930 { 1931 // m_thread_list_real does have its own mutex, but we need to 1932 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1933 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1934 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1935 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1936 1937 if (!thread_sp) 1938 { 1939 // Create the thread if we need to 1940 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1941 m_thread_list_real.AddThread(thread_sp); 1942 } 1943 } 1944 1945 if (thread_sp) 1946 { 1947 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1948 gdb_thread->GetRegisterContext()->InvalidateIfNeeded(true); 1949 1950 for (const auto &pair : expedited_register_map) 1951 { 1952 StringExtractor reg_value_extractor; 1953 reg_value_extractor.GetStringRef() = pair.second; 1954 gdb_thread->PrivateSetRegisterValue (pair.first, reg_value_extractor); 1955 } 1956 1957 thread_sp->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1958 1959 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1960 // Check if the GDB server was able to provide the queue name, kind and serial number 1961 if (queue_vars_valid) 1962 gdb_thread->SetQueueInfo(std::move(queue_name), queue_kind, queue_serial); 1963 else 1964 gdb_thread->ClearQueueInfo(); 1965 1966 // Make sure we update our thread stop reason just once 1967 if (!thread_sp->StopInfoIsUpToDate()) 1968 { 1969 thread_sp->SetStopInfo (StopInfoSP()); 1970 1971 if (exc_type != 0) 1972 { 1973 const size_t exc_data_size = exc_data.size(); 1974 1975 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1976 exc_type, 1977 exc_data_size, 1978 exc_data_size >= 1 ? exc_data[0] : 0, 1979 exc_data_size >= 2 ? exc_data[1] : 0, 1980 exc_data_size >= 3 ? exc_data[2] : 0)); 1981 } 1982 else 1983 { 1984 bool handled = false; 1985 bool did_exec = false; 1986 if (!reason.empty()) 1987 { 1988 if (reason.compare("trace") == 0) 1989 { 1990 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1991 handled = true; 1992 } 1993 else if (reason.compare("breakpoint") == 0) 1994 { 1995 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1996 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1997 if (bp_site_sp) 1998 { 1999 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 2000 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 2001 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 2002 handled = true; 2003 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 2004 { 2005 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 2006 } 2007 else 2008 { 2009 StopInfoSP invalid_stop_info_sp; 2010 thread_sp->SetStopInfo (invalid_stop_info_sp); 2011 } 2012 } 2013 } 2014 else if (reason.compare("trap") == 0) 2015 { 2016 // Let the trap just use the standard signal stop reason below... 2017 } 2018 else if (reason.compare("watchpoint") == 0) 2019 { 2020 StringExtractor desc_extractor(description.c_str()); 2021 addr_t wp_addr = desc_extractor.GetU64(LLDB_INVALID_ADDRESS); 2022 uint32_t wp_index = desc_extractor.GetU32(LLDB_INVALID_INDEX32); 2023 watch_id_t watch_id = LLDB_INVALID_WATCH_ID; 2024 if (wp_addr != LLDB_INVALID_ADDRESS) 2025 { 2026 WatchpointSP wp_sp = GetTarget().GetWatchpointList().FindByAddress(wp_addr); 2027 if (wp_sp) 2028 { 2029 wp_sp->SetHardwareIndex(wp_index); 2030 watch_id = wp_sp->GetID(); 2031 } 2032 } 2033 if (watch_id == LLDB_INVALID_WATCH_ID) 2034 { 2035 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_WATCHPOINTS)); 2036 if (log) log->Printf ("failed to find watchpoint"); 2037 } 2038 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 2039 handled = true; 2040 } 2041 else if (reason.compare("exception") == 0) 2042 { 2043 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 2044 handled = true; 2045 } 2046 else if (reason.compare("exec") == 0) 2047 { 2048 did_exec = true; 2049 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 2050 handled = true; 2051 } 2052 } 2053 2054 if (!handled && signo && did_exec == false) 2055 { 2056 if (signo == SIGTRAP) 2057 { 2058 // Currently we are going to assume SIGTRAP means we are either 2059 // hitting a breakpoint or hardware single stepping. 2060 handled = true; 2061 addr_t pc = thread_sp->GetRegisterContext()->GetPC() + m_breakpoint_pc_offset; 2062 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 2063 2064 if (bp_site_sp) 2065 { 2066 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 2067 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 2068 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 2069 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 2070 { 2071 if(m_breakpoint_pc_offset != 0) 2072 thread_sp->GetRegisterContext()->SetPC(pc); 2073 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 2074 } 2075 else 2076 { 2077 StopInfoSP invalid_stop_info_sp; 2078 thread_sp->SetStopInfo (invalid_stop_info_sp); 2079 } 2080 } 2081 else 2082 { 2083 // If we were stepping then assume the stop was the result of the trace. If we were 2084 // not stepping then report the SIGTRAP. 2085 // FIXME: We are still missing the case where we single step over a trap instruction. 2086 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 2087 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 2088 else 2089 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo, description.c_str())); 2090 } 2091 } 2092 if (!handled) 2093 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo, description.c_str())); 2094 } 2095 2096 if (!description.empty()) 2097 { 2098 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 2099 if (stop_info_sp) 2100 { 2101 const char *stop_info_desc = stop_info_sp->GetDescription(); 2102 if (!stop_info_desc || !stop_info_desc[0]) 2103 stop_info_sp->SetDescription (description.c_str()); 2104 } 2105 else 2106 { 2107 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 2108 } 2109 } 2110 } 2111 } 2112 } 2113 } 2114 return thread_sp; 2115 } 2116 2117 lldb::ThreadSP 2118 ProcessGDBRemote::SetThreadStopInfo (StructuredData::Dictionary *thread_dict) 2119 { 2120 static ConstString g_key_tid("tid"); 2121 static ConstString g_key_name("name"); 2122 static ConstString g_key_reason("reason"); 2123 static ConstString g_key_metype("metype"); 2124 static ConstString g_key_medata("medata"); 2125 static ConstString g_key_qaddr("qaddr"); 2126 static ConstString g_key_queue_name("qname"); 2127 static ConstString g_key_queue_kind("qkind"); 2128 static ConstString g_key_queue_serial("qserial"); 2129 static ConstString g_key_registers("registers"); 2130 static ConstString g_key_memory("memory"); 2131 static ConstString g_key_address("address"); 2132 static ConstString g_key_bytes("bytes"); 2133 static ConstString g_key_description("description"); 2134 static ConstString g_key_signal("signal"); 2135 2136 // Stop with signal and thread info 2137 lldb::tid_t tid = LLDB_INVALID_THREAD_ID; 2138 uint8_t signo = 0; 2139 std::string value; 2140 std::string thread_name; 2141 std::string reason; 2142 std::string description; 2143 uint32_t exc_type = 0; 2144 std::vector<addr_t> exc_data; 2145 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 2146 ExpeditedRegisterMap expedited_register_map; 2147 bool queue_vars_valid = false; 2148 std::string queue_name; 2149 QueueKind queue_kind = eQueueKindUnknown; 2150 uint64_t queue_serial = 0; 2151 // Iterate through all of the thread dictionary key/value pairs from the structured data dictionary 2152 2153 thread_dict->ForEach([this, 2154 &tid, 2155 &expedited_register_map, 2156 &thread_name, 2157 &signo, 2158 &reason, 2159 &description, 2160 &exc_type, 2161 &exc_data, 2162 &thread_dispatch_qaddr, 2163 &queue_vars_valid, 2164 &queue_name, 2165 &queue_kind, 2166 &queue_serial] 2167 (ConstString key, StructuredData::Object* object) -> bool 2168 { 2169 if (key == g_key_tid) 2170 { 2171 // thread in big endian hex 2172 tid = object->GetIntegerValue(LLDB_INVALID_THREAD_ID); 2173 } 2174 else if (key == g_key_metype) 2175 { 2176 // exception type in big endian hex 2177 exc_type = object->GetIntegerValue(0); 2178 } 2179 else if (key == g_key_medata) 2180 { 2181 // exception data in big endian hex 2182 StructuredData::Array *array = object->GetAsArray(); 2183 if (array) 2184 { 2185 array->ForEach([&exc_data](StructuredData::Object* object) -> bool { 2186 exc_data.push_back(object->GetIntegerValue()); 2187 return true; // Keep iterating through all array items 2188 }); 2189 } 2190 } 2191 else if (key == g_key_name) 2192 { 2193 thread_name = object->GetStringValue(); 2194 } 2195 else if (key == g_key_qaddr) 2196 { 2197 thread_dispatch_qaddr = object->GetIntegerValue(LLDB_INVALID_ADDRESS); 2198 } 2199 else if (key == g_key_queue_name) 2200 { 2201 queue_vars_valid = true; 2202 queue_name = object->GetStringValue(); 2203 } 2204 else if (key == g_key_queue_kind) 2205 { 2206 std::string queue_kind_str = object->GetStringValue(); 2207 if (queue_kind_str == "serial") 2208 { 2209 queue_vars_valid = true; 2210 queue_kind = eQueueKindSerial; 2211 } 2212 else if (queue_kind_str == "concurrent") 2213 { 2214 queue_vars_valid = true; 2215 queue_kind = eQueueKindConcurrent; 2216 } 2217 } 2218 else if (key == g_key_queue_serial) 2219 { 2220 queue_serial = object->GetIntegerValue(0); 2221 if (queue_serial != 0) 2222 queue_vars_valid = true; 2223 } 2224 else if (key == g_key_reason) 2225 { 2226 reason = object->GetStringValue(); 2227 } 2228 else if (key == g_key_description) 2229 { 2230 description = object->GetStringValue(); 2231 } 2232 else if (key == g_key_registers) 2233 { 2234 StructuredData::Dictionary *registers_dict = object->GetAsDictionary(); 2235 2236 if (registers_dict) 2237 { 2238 registers_dict->ForEach([&expedited_register_map](ConstString key, StructuredData::Object* object) -> bool { 2239 const uint32_t reg = StringConvert::ToUInt32 (key.GetCString(), UINT32_MAX, 10); 2240 if (reg != UINT32_MAX) 2241 expedited_register_map[reg] = object->GetStringValue(); 2242 return true; // Keep iterating through all array items 2243 }); 2244 } 2245 } 2246 else if (key == g_key_memory) 2247 { 2248 StructuredData::Array *array = object->GetAsArray(); 2249 if (array) 2250 { 2251 array->ForEach([this](StructuredData::Object* object) -> bool { 2252 StructuredData::Dictionary *mem_cache_dict = object->GetAsDictionary(); 2253 if (mem_cache_dict) 2254 { 2255 lldb::addr_t mem_cache_addr = LLDB_INVALID_ADDRESS; 2256 if (mem_cache_dict->GetValueForKeyAsInteger<lldb::addr_t>("address", mem_cache_addr)) 2257 { 2258 if (mem_cache_addr != LLDB_INVALID_ADDRESS) 2259 { 2260 StringExtractor bytes; 2261 if (mem_cache_dict->GetValueForKeyAsString("bytes", bytes.GetStringRef())) 2262 { 2263 bytes.SetFilePos(0); 2264 2265 const size_t byte_size = bytes.GetStringRef().size()/2; 2266 DataBufferSP data_buffer_sp(new DataBufferHeap(byte_size, 0)); 2267 const size_t bytes_copied = bytes.GetHexBytes (data_buffer_sp->GetBytes(), byte_size, 0); 2268 if (bytes_copied == byte_size) 2269 m_memory_cache.AddL1CacheData(mem_cache_addr, data_buffer_sp); 2270 } 2271 } 2272 } 2273 } 2274 return true; // Keep iterating through all array items 2275 }); 2276 } 2277 2278 } 2279 else if (key == g_key_signal) 2280 signo = object->GetIntegerValue(LLDB_INVALID_SIGNAL_NUMBER); 2281 return true; // Keep iterating through all dictionary key/value pairs 2282 }); 2283 2284 return SetThreadStopInfo (tid, 2285 expedited_register_map, 2286 signo, 2287 thread_name, 2288 reason, 2289 description, 2290 exc_type, 2291 exc_data, 2292 thread_dispatch_qaddr, 2293 queue_vars_valid, 2294 queue_name, 2295 queue_kind, 2296 queue_serial); 2297 } 2298 2299 StateType 2300 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 2301 { 2302 stop_packet.SetFilePos (0); 2303 const char stop_type = stop_packet.GetChar(); 2304 switch (stop_type) 2305 { 2306 case 'T': 2307 case 'S': 2308 { 2309 // This is a bit of a hack, but is is required. If we did exec, we 2310 // need to clear our thread lists and also know to rebuild our dynamic 2311 // register info before we lookup and threads and populate the expedited 2312 // register values so we need to know this right away so we can cleanup 2313 // and update our registers. 2314 const uint32_t stop_id = GetStopID(); 2315 if (stop_id == 0) 2316 { 2317 // Our first stop, make sure we have a process ID, and also make 2318 // sure we know about our registers 2319 if (GetID() == LLDB_INVALID_PROCESS_ID) 2320 { 2321 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 2322 if (pid != LLDB_INVALID_PROCESS_ID) 2323 SetID (pid); 2324 } 2325 BuildDynamicRegisterInfo (true); 2326 } 2327 // Stop with signal and thread info 2328 lldb::tid_t tid = LLDB_INVALID_THREAD_ID; 2329 const uint8_t signo = stop_packet.GetHexU8(); 2330 std::string key; 2331 std::string value; 2332 std::string thread_name; 2333 std::string reason; 2334 std::string description; 2335 uint32_t exc_type = 0; 2336 std::vector<addr_t> exc_data; 2337 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 2338 bool queue_vars_valid = false; // says if locals below that start with "queue_" are valid 2339 std::string queue_name; 2340 QueueKind queue_kind = eQueueKindUnknown; 2341 uint64_t queue_serial = 0; 2342 ExpeditedRegisterMap expedited_register_map; 2343 while (stop_packet.GetNameColonValue(key, value)) 2344 { 2345 if (key.compare("metype") == 0) 2346 { 2347 // exception type in big endian hex 2348 exc_type = StringConvert::ToUInt32 (value.c_str(), 0, 16); 2349 } 2350 else if (key.compare("medata") == 0) 2351 { 2352 // exception data in big endian hex 2353 exc_data.push_back(StringConvert::ToUInt64 (value.c_str(), 0, 16)); 2354 } 2355 else if (key.compare("thread") == 0) 2356 { 2357 // thread in big endian hex 2358 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 2359 } 2360 else if (key.compare("threads") == 0) 2361 { 2362 Mutex::Locker locker(m_thread_list_real.GetMutex()); 2363 m_thread_ids.clear(); 2364 // A comma separated list of all threads in the current 2365 // process that includes the thread for this stop reply 2366 // packet 2367 size_t comma_pos; 2368 lldb::tid_t tid; 2369 while ((comma_pos = value.find(',')) != std::string::npos) 2370 { 2371 value[comma_pos] = '\0'; 2372 // thread in big endian hex 2373 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 2374 if (tid != LLDB_INVALID_THREAD_ID) 2375 m_thread_ids.push_back (tid); 2376 value.erase(0, comma_pos + 1); 2377 } 2378 tid = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 2379 if (tid != LLDB_INVALID_THREAD_ID) 2380 m_thread_ids.push_back (tid); 2381 } 2382 else if (key.compare("jstopinfo") == 0) 2383 { 2384 StringExtractor json_extractor; 2385 // Swap "value" over into "name_extractor" 2386 json_extractor.GetStringRef().swap(value); 2387 // Now convert the HEX bytes into a string value 2388 json_extractor.GetHexByteString (value); 2389 2390 // This JSON contains thread IDs and thread stop info for all threads. 2391 // It doesn't contain expedited registers, memory or queue info. 2392 m_jstopinfo_sp = StructuredData::ParseJSON (value); 2393 } 2394 else if (key.compare("hexname") == 0) 2395 { 2396 StringExtractor name_extractor; 2397 // Swap "value" over into "name_extractor" 2398 name_extractor.GetStringRef().swap(value); 2399 // Now convert the HEX bytes into a string value 2400 name_extractor.GetHexByteString (value); 2401 thread_name.swap (value); 2402 } 2403 else if (key.compare("name") == 0) 2404 { 2405 thread_name.swap (value); 2406 } 2407 else if (key.compare("qaddr") == 0) 2408 { 2409 thread_dispatch_qaddr = StringConvert::ToUInt64 (value.c_str(), 0, 16); 2410 } 2411 else if (key.compare("qname") == 0) 2412 { 2413 queue_vars_valid = true; 2414 StringExtractor name_extractor; 2415 // Swap "value" over into "name_extractor" 2416 name_extractor.GetStringRef().swap(value); 2417 // Now convert the HEX bytes into a string value 2418 name_extractor.GetHexByteString (value); 2419 queue_name.swap (value); 2420 } 2421 else if (key.compare("qkind") == 0) 2422 { 2423 if (value == "serial") 2424 { 2425 queue_vars_valid = true; 2426 queue_kind = eQueueKindSerial; 2427 } 2428 else if (value == "concurrent") 2429 { 2430 queue_vars_valid = true; 2431 queue_kind = eQueueKindConcurrent; 2432 } 2433 } 2434 else if (key.compare("qserial") == 0) 2435 { 2436 queue_serial = StringConvert::ToUInt64 (value.c_str(), 0, 0); 2437 if (queue_serial != 0) 2438 queue_vars_valid = true; 2439 } 2440 else if (key.compare("reason") == 0) 2441 { 2442 reason.swap(value); 2443 } 2444 else if (key.compare("description") == 0) 2445 { 2446 StringExtractor desc_extractor; 2447 // Swap "value" over into "name_extractor" 2448 desc_extractor.GetStringRef().swap(value); 2449 // Now convert the HEX bytes into a string value 2450 desc_extractor.GetHexByteString (value); 2451 description.swap(value); 2452 } 2453 else if (key.compare("memory") == 0) 2454 { 2455 // Expedited memory. GDB servers can choose to send back expedited memory 2456 // that can populate the L1 memory cache in the process so that things like 2457 // the frame pointer backchain can be expedited. This will help stack 2458 // backtracing be more efficient by not having to send as many memory read 2459 // requests down the remote GDB server. 2460 2461 // Key/value pair format: memory:<addr>=<bytes>; 2462 // <addr> is a number whose base will be interpreted by the prefix: 2463 // "0x[0-9a-fA-F]+" for hex 2464 // "0[0-7]+" for octal 2465 // "[1-9]+" for decimal 2466 // <bytes> is native endian ASCII hex bytes just like the register values 2467 llvm::StringRef value_ref(value); 2468 std::pair<llvm::StringRef, llvm::StringRef> pair; 2469 pair = value_ref.split('='); 2470 if (!pair.first.empty() && !pair.second.empty()) 2471 { 2472 std::string addr_str(pair.first.str()); 2473 const lldb::addr_t mem_cache_addr = StringConvert::ToUInt64(addr_str.c_str(), LLDB_INVALID_ADDRESS, 0); 2474 if (mem_cache_addr != LLDB_INVALID_ADDRESS) 2475 { 2476 StringExtractor bytes; 2477 bytes.GetStringRef() = pair.second.str(); 2478 const size_t byte_size = bytes.GetStringRef().size()/2; 2479 DataBufferSP data_buffer_sp(new DataBufferHeap(byte_size, 0)); 2480 const size_t bytes_copied = bytes.GetHexBytes (data_buffer_sp->GetBytes(), byte_size, 0); 2481 if (bytes_copied == byte_size) 2482 m_memory_cache.AddL1CacheData(mem_cache_addr, data_buffer_sp); 2483 } 2484 } 2485 } 2486 else if (key.size() == 2 && ::isxdigit(key[0]) && ::isxdigit(key[1])) 2487 { 2488 uint32_t reg = StringConvert::ToUInt32 (key.c_str(), UINT32_MAX, 16); 2489 if (reg != UINT32_MAX) 2490 expedited_register_map[reg] = std::move(value); 2491 } 2492 } 2493 2494 if (tid == LLDB_INVALID_THREAD_ID) 2495 { 2496 // A thread id may be invalid if the response is old style 'S' packet which does not provide the 2497 // thread information. So update the thread list and choose the first one. 2498 UpdateThreadIDList (); 2499 2500 if (!m_thread_ids.empty ()) 2501 { 2502 tid = m_thread_ids.front (); 2503 } 2504 } 2505 2506 ThreadSP thread_sp = SetThreadStopInfo (tid, 2507 expedited_register_map, 2508 signo, 2509 thread_name, 2510 reason, 2511 description, 2512 exc_type, 2513 exc_data, 2514 thread_dispatch_qaddr, 2515 queue_vars_valid, 2516 queue_name, 2517 queue_kind, 2518 queue_serial); 2519 2520 return eStateStopped; 2521 } 2522 break; 2523 2524 case 'W': 2525 case 'X': 2526 // process exited 2527 return eStateExited; 2528 2529 default: 2530 break; 2531 } 2532 return eStateInvalid; 2533 } 2534 2535 void 2536 ProcessGDBRemote::RefreshStateAfterStop () 2537 { 2538 Mutex::Locker locker(m_thread_list_real.GetMutex()); 2539 m_thread_ids.clear(); 2540 // Set the thread stop info. It might have a "threads" key whose value is 2541 // a list of all thread IDs in the current process, so m_thread_ids might 2542 // get set. 2543 2544 // Scope for the lock 2545 { 2546 // Lock the thread stack while we access it 2547 Mutex::Locker stop_stack_lock(m_last_stop_packet_mutex); 2548 // Get the number of stop packets on the stack 2549 int nItems = m_stop_packet_stack.size(); 2550 // Iterate over them 2551 for (int i = 0; i < nItems; i++) 2552 { 2553 // Get the thread stop info 2554 StringExtractorGDBRemote stop_info = m_stop_packet_stack[i]; 2555 // Process thread stop info 2556 SetThreadStopInfo(stop_info); 2557 } 2558 // Clear the thread stop stack 2559 m_stop_packet_stack.clear(); 2560 } 2561 2562 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 2563 if (m_thread_ids.empty()) 2564 { 2565 // No, we need to fetch the thread list manually 2566 UpdateThreadIDList(); 2567 } 2568 2569 // If we have queried for a default thread id 2570 if (m_initial_tid != LLDB_INVALID_THREAD_ID) 2571 { 2572 m_thread_list.SetSelectedThreadByID(m_initial_tid); 2573 m_initial_tid = LLDB_INVALID_THREAD_ID; 2574 } 2575 2576 // Let all threads recover from stopping and do any clean up based 2577 // on the previous thread state (if any). 2578 m_thread_list_real.RefreshStateAfterStop(); 2579 2580 } 2581 2582 Error 2583 ProcessGDBRemote::DoHalt (bool &caused_stop) 2584 { 2585 Error error; 2586 2587 bool timed_out = false; 2588 Mutex::Locker locker; 2589 2590 if (m_public_state.GetValue() == eStateAttaching) 2591 { 2592 // We are being asked to halt during an attach. We need to just close 2593 // our file handle and debugserver will go away, and we can be done... 2594 m_gdb_comm.Disconnect(); 2595 } 2596 else 2597 { 2598 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 2599 { 2600 if (timed_out) 2601 error.SetErrorString("timed out sending interrupt packet"); 2602 else 2603 error.SetErrorString("unknown error sending interrupt packet"); 2604 } 2605 2606 caused_stop = m_gdb_comm.GetInterruptWasSent (); 2607 } 2608 return error; 2609 } 2610 2611 Error 2612 ProcessGDBRemote::DoDetach(bool keep_stopped) 2613 { 2614 Error error; 2615 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2616 if (log) 2617 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 2618 2619 error = m_gdb_comm.Detach (keep_stopped); 2620 if (log) 2621 { 2622 if (error.Success()) 2623 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 2624 else 2625 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 2626 } 2627 2628 if (!error.Success()) 2629 return error; 2630 2631 // Sleep for one second to let the process get all detached... 2632 StopAsyncThread (); 2633 2634 SetPrivateState (eStateDetached); 2635 ResumePrivateStateThread(); 2636 2637 //KillDebugserverProcess (); 2638 return error; 2639 } 2640 2641 2642 Error 2643 ProcessGDBRemote::DoDestroy () 2644 { 2645 Error error; 2646 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2647 if (log) 2648 log->Printf ("ProcessGDBRemote::DoDestroy()"); 2649 2650 // There is a bug in older iOS debugservers where they don't shut down the process 2651 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 2652 // this can cause problems with restarting. So we check to see if any of our threads are stopped 2653 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 2654 // destroy it again. 2655 // 2656 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 2657 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 2658 // the debugservers with this bug are equal. There really should be a better way to test this! 2659 // 2660 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 2661 // get called here to destroy again and we're still at a breakpoint or exception, then we should 2662 // just do the straight-forward kill. 2663 // 2664 // And of course, if we weren't able to stop the process by the time we get here, it isn't 2665 // necessary (or helpful) to do any of this. 2666 2667 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 2668 { 2669 PlatformSP platform_sp = GetTarget().GetPlatform(); 2670 2671 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 2672 if (platform_sp 2673 && platform_sp->GetName() 2674 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 2675 { 2676 if (m_destroy_tried_resuming) 2677 { 2678 if (log) 2679 log->PutCString ("ProcessGDBRemote::DoDestroy() - Tried resuming to destroy once already, not doing it again."); 2680 } 2681 else 2682 { 2683 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 2684 // but we really need it to happen here and it doesn't matter if we do it twice. 2685 m_thread_list.DiscardThreadPlans(); 2686 DisableAllBreakpointSites(); 2687 2688 bool stop_looks_like_crash = false; 2689 ThreadList &threads = GetThreadList(); 2690 2691 { 2692 Mutex::Locker locker(threads.GetMutex()); 2693 2694 size_t num_threads = threads.GetSize(); 2695 for (size_t i = 0; i < num_threads; i++) 2696 { 2697 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 2698 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 2699 StopReason reason = eStopReasonInvalid; 2700 if (stop_info_sp) 2701 reason = stop_info_sp->GetStopReason(); 2702 if (reason == eStopReasonBreakpoint 2703 || reason == eStopReasonException) 2704 { 2705 if (log) 2706 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 2707 thread_sp->GetProtocolID(), 2708 stop_info_sp->GetDescription()); 2709 stop_looks_like_crash = true; 2710 break; 2711 } 2712 } 2713 } 2714 2715 if (stop_looks_like_crash) 2716 { 2717 if (log) 2718 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 2719 m_destroy_tried_resuming = true; 2720 2721 // If we are going to run again before killing, it would be good to suspend all the threads 2722 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 2723 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 2724 // have to run the risk of letting those threads proceed a bit. 2725 2726 { 2727 Mutex::Locker locker(threads.GetMutex()); 2728 2729 size_t num_threads = threads.GetSize(); 2730 for (size_t i = 0; i < num_threads; i++) 2731 { 2732 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 2733 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 2734 StopReason reason = eStopReasonInvalid; 2735 if (stop_info_sp) 2736 reason = stop_info_sp->GetStopReason(); 2737 if (reason != eStopReasonBreakpoint 2738 && reason != eStopReasonException) 2739 { 2740 if (log) 2741 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 2742 thread_sp->GetProtocolID()); 2743 thread_sp->SetResumeState(eStateSuspended); 2744 } 2745 } 2746 } 2747 Resume (); 2748 return Destroy(false); 2749 } 2750 } 2751 } 2752 } 2753 2754 // Interrupt if our inferior is running... 2755 int exit_status = SIGABRT; 2756 std::string exit_string; 2757 2758 if (m_gdb_comm.IsConnected()) 2759 { 2760 if (m_public_state.GetValue() != eStateAttaching) 2761 { 2762 StringExtractorGDBRemote response; 2763 bool send_async = true; 2764 GDBRemoteCommunication::ScopedTimeout (m_gdb_comm, 3); 2765 2766 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async) == GDBRemoteCommunication::PacketResult::Success) 2767 { 2768 char packet_cmd = response.GetChar(0); 2769 2770 if (packet_cmd == 'W' || packet_cmd == 'X') 2771 { 2772 #if defined(__APPLE__) 2773 // For Native processes on Mac OS X, we launch through the Host Platform, then hand the process off 2774 // to debugserver, which becomes the parent process through "PT_ATTACH". Then when we go to kill 2775 // the process on Mac OS X we call ptrace(PT_KILL) to kill it, then we call waitpid which returns 2776 // with no error and the correct status. But amusingly enough that doesn't seem to actually reap 2777 // the process, but instead it is left around as a Zombie. Probably the kernel is in the process of 2778 // switching ownership back to lldb which was the original parent, and gets confused in the handoff. 2779 // Anyway, so call waitpid here to finally reap it. 2780 PlatformSP platform_sp(GetTarget().GetPlatform()); 2781 if (platform_sp && platform_sp->IsHost()) 2782 { 2783 int status; 2784 ::pid_t reap_pid; 2785 reap_pid = waitpid (GetID(), &status, WNOHANG); 2786 if (log) 2787 log->Printf ("Reaped pid: %d, status: %d.\n", reap_pid, status); 2788 } 2789 #endif 2790 SetLastStopPacket (response); 2791 ClearThreadIDList (); 2792 exit_status = response.GetHexU8(); 2793 } 2794 else 2795 { 2796 if (log) 2797 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2798 exit_string.assign("got unexpected response to k packet: "); 2799 exit_string.append(response.GetStringRef()); 2800 } 2801 } 2802 else 2803 { 2804 if (log) 2805 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2806 exit_string.assign("failed to send the k packet"); 2807 } 2808 } 2809 else 2810 { 2811 if (log) 2812 log->Printf ("ProcessGDBRemote::DoDestroy - killed or interrupted while attaching"); 2813 exit_string.assign ("killed or interrupted while attaching."); 2814 } 2815 } 2816 else 2817 { 2818 // If we missed setting the exit status on the way out, do it here. 2819 // NB set exit status can be called multiple times, the first one sets the status. 2820 exit_string.assign("destroying when not connected to debugserver"); 2821 } 2822 2823 SetExitStatus(exit_status, exit_string.c_str()); 2824 2825 StopAsyncThread (); 2826 KillDebugserverProcess (); 2827 return error; 2828 } 2829 2830 void 2831 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 2832 { 2833 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 2834 if (did_exec) 2835 { 2836 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2837 if (log) 2838 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 2839 2840 m_thread_list_real.Clear(); 2841 m_thread_list.Clear(); 2842 BuildDynamicRegisterInfo (true); 2843 m_gdb_comm.ResetDiscoverableSettings (did_exec); 2844 } 2845 2846 // Scope the lock 2847 { 2848 // Lock the thread stack while we access it 2849 Mutex::Locker stop_stack_lock(m_last_stop_packet_mutex); 2850 2851 // We are are not using non-stop mode, there can only be one last stop 2852 // reply packet, so clear the list. 2853 if (GetTarget().GetNonStopModeEnabled() == false) 2854 m_stop_packet_stack.clear(); 2855 2856 // Add this stop packet to the stop packet stack 2857 // This stack will get popped and examined when we switch to the 2858 // Stopped state 2859 m_stop_packet_stack.push_back(response); 2860 } 2861 } 2862 2863 //------------------------------------------------------------------ 2864 // Process Queries 2865 //------------------------------------------------------------------ 2866 2867 bool 2868 ProcessGDBRemote::IsAlive () 2869 { 2870 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2871 } 2872 2873 addr_t 2874 ProcessGDBRemote::GetImageInfoAddress() 2875 { 2876 // request the link map address via the $qShlibInfoAddr packet 2877 lldb::addr_t addr = m_gdb_comm.GetShlibInfoAddr(); 2878 2879 // the loaded module list can also provides a link map address 2880 if (addr == LLDB_INVALID_ADDRESS) 2881 { 2882 GDBLoadedModuleInfoList list; 2883 if (GetLoadedModuleList (list).Success()) 2884 addr = list.m_link_map; 2885 } 2886 2887 return addr; 2888 } 2889 2890 void 2891 ProcessGDBRemote::WillPublicStop () 2892 { 2893 // See if the GDB remote client supports the JSON threads info. 2894 // If so, we gather stop info for all threads, expedited registers, 2895 // expedited memory, runtime queue information (iOS and MacOSX only), 2896 // and more. Expediting memory will help stack backtracing be much 2897 // faster. Expediting registers will make sure we don't have to read 2898 // the thread registers for GPRs. 2899 m_jthreadsinfo_sp = m_gdb_comm.GetThreadsInfo(); 2900 2901 if (m_jthreadsinfo_sp) 2902 { 2903 // Now set the stop info for each thread and also expedite any registers 2904 // and memory that was in the jThreadsInfo response. 2905 StructuredData::Array *thread_infos = m_jthreadsinfo_sp->GetAsArray(); 2906 if (thread_infos) 2907 { 2908 const size_t n = thread_infos->GetSize(); 2909 for (size_t i=0; i<n; ++i) 2910 { 2911 StructuredData::Dictionary *thread_dict = thread_infos->GetItemAtIndex(i)->GetAsDictionary(); 2912 if (thread_dict) 2913 SetThreadStopInfo(thread_dict); 2914 } 2915 } 2916 } 2917 } 2918 2919 //------------------------------------------------------------------ 2920 // Process Memory 2921 //------------------------------------------------------------------ 2922 size_t 2923 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2924 { 2925 GetMaxMemorySize (); 2926 if (size > m_max_memory_size) 2927 { 2928 // Keep memory read sizes down to a sane limit. This function will be 2929 // called multiple times in order to complete the task by 2930 // lldb_private::Process so it is ok to do this. 2931 size = m_max_memory_size; 2932 } 2933 2934 char packet[64]; 2935 int packet_len; 2936 bool binary_memory_read = m_gdb_comm.GetxPacketSupported(); 2937 if (binary_memory_read) 2938 { 2939 packet_len = ::snprintf (packet, sizeof(packet), "x0x%" PRIx64 ",0x%" PRIx64, (uint64_t)addr, (uint64_t)size); 2940 } 2941 else 2942 { 2943 packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2944 } 2945 assert (packet_len + 1 < (int)sizeof(packet)); 2946 StringExtractorGDBRemote response; 2947 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true) == GDBRemoteCommunication::PacketResult::Success) 2948 { 2949 if (response.IsNormalResponse()) 2950 { 2951 error.Clear(); 2952 if (binary_memory_read) 2953 { 2954 // The lower level GDBRemoteCommunication packet receive layer has already de-quoted any 2955 // 0x7d character escaping that was present in the packet 2956 2957 size_t data_received_size = response.GetBytesLeft(); 2958 if (data_received_size > size) 2959 { 2960 // Don't write past the end of BUF if the remote debug server gave us too 2961 // much data for some reason. 2962 data_received_size = size; 2963 } 2964 memcpy (buf, response.GetStringRef().data(), data_received_size); 2965 return data_received_size; 2966 } 2967 else 2968 { 2969 return response.GetHexBytes(buf, size, '\xdd'); 2970 } 2971 } 2972 else if (response.IsErrorResponse()) 2973 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2974 else if (response.IsUnsupportedResponse()) 2975 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2976 else 2977 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2978 } 2979 else 2980 { 2981 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2982 } 2983 return 0; 2984 } 2985 2986 size_t 2987 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2988 { 2989 GetMaxMemorySize (); 2990 if (size > m_max_memory_size) 2991 { 2992 // Keep memory read sizes down to a sane limit. This function will be 2993 // called multiple times in order to complete the task by 2994 // lldb_private::Process so it is ok to do this. 2995 size = m_max_memory_size; 2996 } 2997 2998 StreamString packet; 2999 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 3000 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 3001 StringExtractorGDBRemote response; 3002 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true) == GDBRemoteCommunication::PacketResult::Success) 3003 { 3004 if (response.IsOKResponse()) 3005 { 3006 error.Clear(); 3007 return size; 3008 } 3009 else if (response.IsErrorResponse()) 3010 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 3011 else if (response.IsUnsupportedResponse()) 3012 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 3013 else 3014 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 3015 } 3016 else 3017 { 3018 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 3019 } 3020 return 0; 3021 } 3022 3023 lldb::addr_t 3024 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 3025 { 3026 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_EXPRESSIONS)); 3027 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 3028 3029 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 3030 switch (supported) 3031 { 3032 case eLazyBoolCalculate: 3033 case eLazyBoolYes: 3034 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 3035 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 3036 return allocated_addr; 3037 3038 case eLazyBoolNo: 3039 // Call mmap() to create memory in the inferior.. 3040 unsigned prot = 0; 3041 if (permissions & lldb::ePermissionsReadable) 3042 prot |= eMmapProtRead; 3043 if (permissions & lldb::ePermissionsWritable) 3044 prot |= eMmapProtWrite; 3045 if (permissions & lldb::ePermissionsExecutable) 3046 prot |= eMmapProtExec; 3047 3048 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 3049 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 3050 m_addr_to_mmap_size[allocated_addr] = size; 3051 else 3052 { 3053 allocated_addr = LLDB_INVALID_ADDRESS; 3054 if (log) 3055 log->Printf ("ProcessGDBRemote::%s no direct stub support for memory allocation, and InferiorCallMmap also failed - is stub missing register context save/restore capability?", __FUNCTION__); 3056 } 3057 break; 3058 } 3059 3060 if (allocated_addr == LLDB_INVALID_ADDRESS) 3061 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 3062 else 3063 error.Clear(); 3064 return allocated_addr; 3065 } 3066 3067 Error 3068 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 3069 MemoryRegionInfo ®ion_info) 3070 { 3071 3072 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 3073 return error; 3074 } 3075 3076 Error 3077 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 3078 { 3079 3080 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 3081 return error; 3082 } 3083 3084 Error 3085 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 3086 { 3087 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 3088 return error; 3089 } 3090 3091 Error 3092 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 3093 { 3094 Error error; 3095 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 3096 3097 switch (supported) 3098 { 3099 case eLazyBoolCalculate: 3100 // We should never be deallocating memory without allocating memory 3101 // first so we should never get eLazyBoolCalculate 3102 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 3103 break; 3104 3105 case eLazyBoolYes: 3106 if (!m_gdb_comm.DeallocateMemory (addr)) 3107 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 3108 break; 3109 3110 case eLazyBoolNo: 3111 // Call munmap() to deallocate memory in the inferior.. 3112 { 3113 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 3114 if (pos != m_addr_to_mmap_size.end() && 3115 InferiorCallMunmap(this, addr, pos->second)) 3116 m_addr_to_mmap_size.erase (pos); 3117 else 3118 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 3119 } 3120 break; 3121 } 3122 3123 return error; 3124 } 3125 3126 3127 //------------------------------------------------------------------ 3128 // Process STDIO 3129 //------------------------------------------------------------------ 3130 size_t 3131 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 3132 { 3133 if (m_stdio_communication.IsConnected()) 3134 { 3135 ConnectionStatus status; 3136 m_stdio_communication.Write(src, src_len, status, NULL); 3137 } 3138 else if (m_stdin_forward) 3139 { 3140 m_gdb_comm.SendStdinNotification(src, src_len); 3141 } 3142 return 0; 3143 } 3144 3145 Error 3146 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 3147 { 3148 Error error; 3149 assert(bp_site != NULL); 3150 3151 // Get logging info 3152 Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 3153 user_id_t site_id = bp_site->GetID(); 3154 3155 // Get the breakpoint address 3156 const addr_t addr = bp_site->GetLoadAddress(); 3157 3158 // Log that a breakpoint was requested 3159 if (log) 3160 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 3161 3162 // Breakpoint already exists and is enabled 3163 if (bp_site->IsEnabled()) 3164 { 3165 if (log) 3166 log->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 3167 return error; 3168 } 3169 3170 // Get the software breakpoint trap opcode size 3171 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site); 3172 3173 // SupportsGDBStoppointPacket() simply checks a boolean, indicating if this breakpoint type 3174 // is supported by the remote stub. These are set to true by default, and later set to false 3175 // only after we receive an unimplemented response when sending a breakpoint packet. This means 3176 // initially that unless we were specifically instructed to use a hardware breakpoint, LLDB will 3177 // attempt to set a software breakpoint. HardwareRequired() also queries a boolean variable which 3178 // indicates if the user specifically asked for hardware breakpoints. If true then we will 3179 // skip over software breakpoints. 3180 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware) && (!bp_site->HardwareRequired())) 3181 { 3182 // Try to send off a software breakpoint packet ($Z0) 3183 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 3184 { 3185 // The breakpoint was placed successfully 3186 bp_site->SetEnabled(true); 3187 bp_site->SetType(BreakpointSite::eExternal); 3188 return error; 3189 } 3190 3191 // SendGDBStoppointTypePacket() will return an error if it was unable to set this 3192 // breakpoint. We need to differentiate between a error specific to placing this breakpoint 3193 // or if we have learned that this breakpoint type is unsupported. To do this, we 3194 // must test the support boolean for this breakpoint type to see if it now indicates that 3195 // this breakpoint type is unsupported. If they are still supported then we should return 3196 // with the error code. If they are now unsupported, then we would like to fall through 3197 // and try another form of breakpoint. 3198 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware)) 3199 return error; 3200 3201 // We reach here when software breakpoints have been found to be unsupported. For future 3202 // calls to set a breakpoint, we will not attempt to set a breakpoint with a type that is 3203 // known not to be supported. 3204 if (log) 3205 log->Printf("Software breakpoints are unsupported"); 3206 3207 // So we will fall through and try a hardware breakpoint 3208 } 3209 3210 // The process of setting a hardware breakpoint is much the same as above. We check the 3211 // supported boolean for this breakpoint type, and if it is thought to be supported then we 3212 // will try to set this breakpoint with a hardware breakpoint. 3213 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 3214 { 3215 // Try to send off a hardware breakpoint packet ($Z1) 3216 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 3217 { 3218 // The breakpoint was placed successfully 3219 bp_site->SetEnabled(true); 3220 bp_site->SetType(BreakpointSite::eHardware); 3221 return error; 3222 } 3223 3224 // Check if the error was something other then an unsupported breakpoint type 3225 if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) 3226 { 3227 // Unable to set this hardware breakpoint 3228 error.SetErrorString("failed to set hardware breakpoint (hardware breakpoint resources might be exhausted or unavailable)"); 3229 return error; 3230 } 3231 3232 // We will reach here when the stub gives an unsupported response to a hardware breakpoint 3233 if (log) 3234 log->Printf("Hardware breakpoints are unsupported"); 3235 3236 // Finally we will falling through to a #trap style breakpoint 3237 } 3238 3239 // Don't fall through when hardware breakpoints were specifically requested 3240 if (bp_site->HardwareRequired()) 3241 { 3242 error.SetErrorString("hardware breakpoints are not supported"); 3243 return error; 3244 } 3245 3246 // As a last resort we want to place a manual breakpoint. An instruction 3247 // is placed into the process memory using memory write packets. 3248 return EnableSoftwareBreakpoint(bp_site); 3249 } 3250 3251 Error 3252 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 3253 { 3254 Error error; 3255 assert (bp_site != NULL); 3256 addr_t addr = bp_site->GetLoadAddress(); 3257 user_id_t site_id = bp_site->GetID(); 3258 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 3259 if (log) 3260 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 3261 3262 if (bp_site->IsEnabled()) 3263 { 3264 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 3265 3266 BreakpointSite::Type bp_type = bp_site->GetType(); 3267 switch (bp_type) 3268 { 3269 case BreakpointSite::eSoftware: 3270 error = DisableSoftwareBreakpoint (bp_site); 3271 break; 3272 3273 case BreakpointSite::eHardware: 3274 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, false, addr, bp_op_size)) 3275 error.SetErrorToGenericError(); 3276 break; 3277 3278 case BreakpointSite::eExternal: 3279 { 3280 GDBStoppointType stoppoint_type; 3281 if (bp_site->IsHardware()) 3282 stoppoint_type = eBreakpointHardware; 3283 else 3284 stoppoint_type = eBreakpointSoftware; 3285 3286 if (m_gdb_comm.SendGDBStoppointTypePacket(stoppoint_type, false, addr, bp_op_size)) 3287 error.SetErrorToGenericError(); 3288 } 3289 break; 3290 } 3291 if (error.Success()) 3292 bp_site->SetEnabled(false); 3293 } 3294 else 3295 { 3296 if (log) 3297 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 3298 return error; 3299 } 3300 3301 if (error.Success()) 3302 error.SetErrorToGenericError(); 3303 return error; 3304 } 3305 3306 // Pre-requisite: wp != NULL. 3307 static GDBStoppointType 3308 GetGDBStoppointType (Watchpoint *wp) 3309 { 3310 assert(wp); 3311 bool watch_read = wp->WatchpointRead(); 3312 bool watch_write = wp->WatchpointWrite(); 3313 3314 // watch_read and watch_write cannot both be false. 3315 assert(watch_read || watch_write); 3316 if (watch_read && watch_write) 3317 return eWatchpointReadWrite; 3318 else if (watch_read) 3319 return eWatchpointRead; 3320 else // Must be watch_write, then. 3321 return eWatchpointWrite; 3322 } 3323 3324 Error 3325 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 3326 { 3327 Error error; 3328 if (wp) 3329 { 3330 user_id_t watchID = wp->GetID(); 3331 addr_t addr = wp->GetLoadAddress(); 3332 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 3333 if (log) 3334 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 3335 if (wp->IsEnabled()) 3336 { 3337 if (log) 3338 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 3339 return error; 3340 } 3341 3342 GDBStoppointType type = GetGDBStoppointType(wp); 3343 // Pass down an appropriate z/Z packet... 3344 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 3345 { 3346 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 3347 { 3348 wp->SetEnabled(true, notify); 3349 return error; 3350 } 3351 else 3352 error.SetErrorString("sending gdb watchpoint packet failed"); 3353 } 3354 else 3355 error.SetErrorString("watchpoints not supported"); 3356 } 3357 else 3358 { 3359 error.SetErrorString("Watchpoint argument was NULL."); 3360 } 3361 if (error.Success()) 3362 error.SetErrorToGenericError(); 3363 return error; 3364 } 3365 3366 Error 3367 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 3368 { 3369 Error error; 3370 if (wp) 3371 { 3372 user_id_t watchID = wp->GetID(); 3373 3374 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 3375 3376 addr_t addr = wp->GetLoadAddress(); 3377 3378 if (log) 3379 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 3380 3381 if (!wp->IsEnabled()) 3382 { 3383 if (log) 3384 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 3385 // See also 'class WatchpointSentry' within StopInfo.cpp. 3386 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 3387 // the watchpoint object to intelligently process this action. 3388 wp->SetEnabled(false, notify); 3389 return error; 3390 } 3391 3392 if (wp->IsHardware()) 3393 { 3394 GDBStoppointType type = GetGDBStoppointType(wp); 3395 // Pass down an appropriate z/Z packet... 3396 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 3397 { 3398 wp->SetEnabled(false, notify); 3399 return error; 3400 } 3401 else 3402 error.SetErrorString("sending gdb watchpoint packet failed"); 3403 } 3404 // TODO: clear software watchpoints if we implement them 3405 } 3406 else 3407 { 3408 error.SetErrorString("Watchpoint argument was NULL."); 3409 } 3410 if (error.Success()) 3411 error.SetErrorToGenericError(); 3412 return error; 3413 } 3414 3415 void 3416 ProcessGDBRemote::Clear() 3417 { 3418 m_flags = 0; 3419 m_thread_list_real.Clear(); 3420 m_thread_list.Clear(); 3421 } 3422 3423 Error 3424 ProcessGDBRemote::DoSignal (int signo) 3425 { 3426 Error error; 3427 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3428 if (log) 3429 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 3430 3431 if (!m_gdb_comm.SendAsyncSignal (signo)) 3432 error.SetErrorStringWithFormat("failed to send signal %i", signo); 3433 return error; 3434 } 3435 3436 Error 3437 ProcessGDBRemote::LaunchAndConnectToDebugserver (const ProcessInfo &process_info) 3438 { 3439 Error error; 3440 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 3441 { 3442 // If we locate debugserver, keep that located version around 3443 static FileSpec g_debugserver_file_spec; 3444 3445 ProcessLaunchInfo debugserver_launch_info; 3446 // Make debugserver run in its own session so signals generated by 3447 // special terminal key sequences (^C) don't affect debugserver. 3448 debugserver_launch_info.SetLaunchInSeparateProcessGroup(true); 3449 3450 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 3451 debugserver_launch_info.SetUserID(process_info.GetUserID()); 3452 3453 #if defined (__APPLE__) && (defined (__arm__) || defined (__arm64__) || defined (__aarch64__)) 3454 // On iOS, still do a local connection using a random port 3455 const char *hostname = "127.0.0.1"; 3456 uint16_t port = get_random_port (); 3457 #else 3458 // Set hostname being NULL to do the reverse connect where debugserver 3459 // will bind to port zero and it will communicate back to us the port 3460 // that we will connect to 3461 const char *hostname = NULL; 3462 uint16_t port = 0; 3463 #endif 3464 3465 error = m_gdb_comm.StartDebugserverProcess (hostname, 3466 port, 3467 debugserver_launch_info, 3468 port); 3469 3470 if (error.Success ()) 3471 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 3472 else 3473 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 3474 3475 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 3476 StartAsyncThread (); 3477 3478 if (error.Fail()) 3479 { 3480 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 3481 3482 if (log) 3483 log->Printf("failed to start debugserver process: %s", error.AsCString()); 3484 return error; 3485 } 3486 3487 if (m_gdb_comm.IsConnected()) 3488 { 3489 // Finish the connection process by doing the handshake without connecting (send NULL URL) 3490 ConnectToDebugserver (NULL); 3491 } 3492 else 3493 { 3494 StreamString connect_url; 3495 connect_url.Printf("connect://%s:%u", hostname, port); 3496 error = ConnectToDebugserver (connect_url.GetString().c_str()); 3497 } 3498 3499 } 3500 return error; 3501 } 3502 3503 bool 3504 ProcessGDBRemote::MonitorDebugserverProcess 3505 ( 3506 void *callback_baton, 3507 lldb::pid_t debugserver_pid, 3508 bool exited, // True if the process did exit 3509 int signo, // Zero for no signal 3510 int exit_status // Exit value of process if signal is zero 3511 ) 3512 { 3513 // The baton is a "ProcessGDBRemote *". Now this class might be gone 3514 // and might not exist anymore, so we need to carefully try to get the 3515 // target for this process first since we have a race condition when 3516 // we are done running between getting the notice that the inferior 3517 // process has died and the debugserver that was debugging this process. 3518 // In our test suite, we are also continually running process after 3519 // process, so we must be very careful to make sure: 3520 // 1 - process object hasn't been deleted already 3521 // 2 - that a new process object hasn't been recreated in its place 3522 3523 // "debugserver_pid" argument passed in is the process ID for 3524 // debugserver that we are tracking... 3525 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3526 3527 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 3528 3529 // Get a shared pointer to the target that has a matching process pointer. 3530 // This target could be gone, or the target could already have a new process 3531 // object inside of it 3532 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 3533 3534 if (log) 3535 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 3536 3537 if (target_sp) 3538 { 3539 // We found a process in a target that matches, but another thread 3540 // might be in the process of launching a new process that will 3541 // soon replace it, so get a shared pointer to the process so we 3542 // can keep it alive. 3543 ProcessSP process_sp (target_sp->GetProcessSP()); 3544 // Now we have a shared pointer to the process that can't go away on us 3545 // so we now make sure it was the same as the one passed in, and also make 3546 // sure that our previous "process *" didn't get deleted and have a new 3547 // "process *" created in its place with the same pointer. To verify this 3548 // we make sure the process has our debugserver process ID. If we pass all 3549 // of these tests, then we are sure that this process is the one we were 3550 // looking for. 3551 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 3552 { 3553 // Sleep for a half a second to make sure our inferior process has 3554 // time to set its exit status before we set it incorrectly when 3555 // both the debugserver and the inferior process shut down. 3556 usleep (500000); 3557 // If our process hasn't yet exited, debugserver might have died. 3558 // If the process did exit, the we are reaping it. 3559 const StateType state = process->GetState(); 3560 3561 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 3562 state != eStateInvalid && 3563 state != eStateUnloaded && 3564 state != eStateExited && 3565 state != eStateDetached) 3566 { 3567 char error_str[1024]; 3568 if (signo) 3569 { 3570 const char *signal_cstr = process->GetUnixSignals()->GetSignalAsCString(signo); 3571 if (signal_cstr) 3572 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 3573 else 3574 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 3575 } 3576 else 3577 { 3578 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 3579 } 3580 3581 process->SetExitStatus (-1, error_str); 3582 } 3583 // Debugserver has exited we need to let our ProcessGDBRemote 3584 // know that it no longer has a debugserver instance 3585 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 3586 } 3587 } 3588 return true; 3589 } 3590 3591 void 3592 ProcessGDBRemote::KillDebugserverProcess () 3593 { 3594 m_gdb_comm.Disconnect(); 3595 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 3596 { 3597 Host::Kill (m_debugserver_pid, SIGINT); 3598 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 3599 } 3600 } 3601 3602 void 3603 ProcessGDBRemote::Initialize() 3604 { 3605 static std::once_flag g_once_flag; 3606 3607 std::call_once(g_once_flag, []() 3608 { 3609 PluginManager::RegisterPlugin (GetPluginNameStatic(), 3610 GetPluginDescriptionStatic(), 3611 CreateInstance, 3612 DebuggerInitialize); 3613 }); 3614 } 3615 3616 void 3617 ProcessGDBRemote::DebuggerInitialize (Debugger &debugger) 3618 { 3619 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 3620 { 3621 const bool is_global_setting = true; 3622 PluginManager::CreateSettingForProcessPlugin (debugger, 3623 GetGlobalPluginProperties()->GetValueProperties(), 3624 ConstString ("Properties for the gdb-remote process plug-in."), 3625 is_global_setting); 3626 } 3627 } 3628 3629 bool 3630 ProcessGDBRemote::StartAsyncThread () 3631 { 3632 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3633 3634 if (log) 3635 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 3636 3637 Mutex::Locker start_locker(m_async_thread_state_mutex); 3638 if (!m_async_thread.IsJoinable()) 3639 { 3640 // Create a thread that watches our internal state and controls which 3641 // events make it to clients (into the DCProcess event queue). 3642 3643 m_async_thread = ThreadLauncher::LaunchThread("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 3644 } 3645 else if (log) 3646 log->Printf("ProcessGDBRemote::%s () - Called when Async thread was already running.", __FUNCTION__); 3647 3648 return m_async_thread.IsJoinable(); 3649 } 3650 3651 void 3652 ProcessGDBRemote::StopAsyncThread () 3653 { 3654 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 3655 3656 if (log) 3657 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 3658 3659 Mutex::Locker start_locker(m_async_thread_state_mutex); 3660 if (m_async_thread.IsJoinable()) 3661 { 3662 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 3663 3664 // This will shut down the async thread. 3665 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 3666 3667 // Stop the stdio thread 3668 m_async_thread.Join(nullptr); 3669 m_async_thread.Reset(); 3670 } 3671 else if (log) 3672 log->Printf("ProcessGDBRemote::%s () - Called when Async thread was not running.", __FUNCTION__); 3673 } 3674 3675 bool 3676 ProcessGDBRemote::HandleNotifyPacket (StringExtractorGDBRemote &packet) 3677 { 3678 // get the packet at a string 3679 const std::string &pkt = packet.GetStringRef(); 3680 // skip %stop: 3681 StringExtractorGDBRemote stop_info(pkt.c_str() + 5); 3682 3683 // pass as a thread stop info packet 3684 SetLastStopPacket(stop_info); 3685 3686 // check for more stop reasons 3687 HandleStopReplySequence(); 3688 3689 // if the process is stopped then we need to fake a resume 3690 // so that we can stop properly with the new break. This 3691 // is possible due to SetPrivateState() broadcasting the 3692 // state change as a side effect. 3693 if (GetPrivateState() == lldb::StateType::eStateStopped) 3694 { 3695 SetPrivateState(lldb::StateType::eStateRunning); 3696 } 3697 3698 // since we have some stopped packets we can halt the process 3699 SetPrivateState(lldb::StateType::eStateStopped); 3700 3701 return true; 3702 } 3703 3704 thread_result_t 3705 ProcessGDBRemote::AsyncThread (void *arg) 3706 { 3707 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 3708 3709 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 3710 if (log) 3711 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 3712 3713 Listener listener ("ProcessGDBRemote::AsyncThread"); 3714 EventSP event_sp; 3715 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 3716 eBroadcastBitAsyncThreadShouldExit; 3717 3718 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 3719 { 3720 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit | 3721 GDBRemoteCommunication::eBroadcastBitGdbReadThreadGotNotify); 3722 3723 bool done = false; 3724 while (!done) 3725 { 3726 if (log) 3727 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 3728 if (listener.WaitForEvent (NULL, event_sp)) 3729 { 3730 const uint32_t event_type = event_sp->GetType(); 3731 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 3732 { 3733 if (log) 3734 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 3735 3736 switch (event_type) 3737 { 3738 case eBroadcastBitAsyncContinue: 3739 { 3740 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 3741 3742 if (continue_packet) 3743 { 3744 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 3745 const size_t continue_cstr_len = continue_packet->GetByteSize (); 3746 if (log) 3747 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 3748 3749 if (::strstr (continue_cstr, "vAttach") == NULL) 3750 process->SetPrivateState(eStateRunning); 3751 StringExtractorGDBRemote response; 3752 3753 // If in Non-Stop-Mode 3754 if (process->GetTarget().GetNonStopModeEnabled()) 3755 { 3756 // send the vCont packet 3757 if (!process->GetGDBRemote().SendvContPacket(process, continue_cstr, continue_cstr_len, response)) 3758 { 3759 // Something went wrong 3760 done = true; 3761 break; 3762 } 3763 } 3764 // If in All-Stop-Mode 3765 else 3766 { 3767 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 3768 3769 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 3770 // The thread ID list might be contained within the "response", or the stop reply packet that 3771 // caused the stop. So clear it now before we give the stop reply packet to the process 3772 // using the process->SetLastStopPacket()... 3773 process->ClearThreadIDList (); 3774 3775 switch (stop_state) 3776 { 3777 case eStateStopped: 3778 case eStateCrashed: 3779 case eStateSuspended: 3780 process->SetLastStopPacket (response); 3781 process->SetPrivateState (stop_state); 3782 break; 3783 3784 case eStateExited: 3785 { 3786 process->SetLastStopPacket (response); 3787 process->ClearThreadIDList(); 3788 response.SetFilePos(1); 3789 3790 int exit_status = response.GetHexU8(); 3791 const char *desc_cstr = NULL; 3792 StringExtractor extractor; 3793 std::string desc_string; 3794 if (response.GetBytesLeft() > 0 && response.GetChar('-') == ';') 3795 { 3796 std::string desc_token; 3797 while (response.GetNameColonValue (desc_token, desc_string)) 3798 { 3799 if (desc_token == "description") 3800 { 3801 extractor.GetStringRef().swap(desc_string); 3802 extractor.SetFilePos(0); 3803 extractor.GetHexByteString (desc_string); 3804 desc_cstr = desc_string.c_str(); 3805 } 3806 } 3807 } 3808 process->SetExitStatus(exit_status, desc_cstr); 3809 done = true; 3810 break; 3811 } 3812 case eStateInvalid: 3813 { 3814 // Check to see if we were trying to attach and if we got back 3815 // the "E87" error code from debugserver -- this indicates that 3816 // the process is not debuggable. Return a slightly more helpful 3817 // error message about why the attach failed. 3818 if (::strstr (continue_cstr, "vAttach") != NULL 3819 && response.GetError() == 0x87) 3820 { 3821 process->SetExitStatus(-1, "cannot attach to process due to System Integrity Protection"); 3822 } 3823 // E01 code from vAttach means that the attach failed 3824 if (::strstr (continue_cstr, "vAttach") != NULL 3825 && response.GetError() == 0x1) 3826 { 3827 process->SetExitStatus(-1, "unable to attach"); 3828 } 3829 else 3830 { 3831 process->SetExitStatus(-1, "lost connection"); 3832 } 3833 break; 3834 } 3835 3836 default: 3837 process->SetPrivateState (stop_state); 3838 break; 3839 } // switch(stop_state) 3840 } // else // if in All-stop-mode 3841 } // if (continue_packet) 3842 } // case eBroadcastBitAysncContinue 3843 break; 3844 3845 case eBroadcastBitAsyncThreadShouldExit: 3846 if (log) 3847 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 3848 done = true; 3849 break; 3850 3851 default: 3852 if (log) 3853 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 3854 done = true; 3855 break; 3856 } 3857 } 3858 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 3859 { 3860 switch (event_type) 3861 { 3862 case Communication::eBroadcastBitReadThreadDidExit: 3863 process->SetExitStatus (-1, "lost connection"); 3864 done = true; 3865 break; 3866 3867 case GDBRemoteCommunication::eBroadcastBitGdbReadThreadGotNotify: 3868 { 3869 lldb_private::Event *event = event_sp.get(); 3870 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event); 3871 StringExtractorGDBRemote notify((const char*)continue_packet->GetBytes()); 3872 // Hand this over to the process to handle 3873 process->HandleNotifyPacket(notify); 3874 break; 3875 } 3876 3877 default: 3878 if (log) 3879 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 3880 done = true; 3881 break; 3882 } 3883 } 3884 } 3885 else 3886 { 3887 if (log) 3888 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 3889 done = true; 3890 } 3891 } 3892 } 3893 3894 if (log) 3895 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 3896 3897 return NULL; 3898 } 3899 3900 //uint32_t 3901 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 3902 //{ 3903 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 3904 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 3905 // if (m_local_debugserver) 3906 // { 3907 // return Host::ListProcessesMatchingName (name, matches, pids); 3908 // } 3909 // else 3910 // { 3911 // // FIXME: Implement talking to the remote debugserver. 3912 // return 0; 3913 // } 3914 // 3915 //} 3916 // 3917 bool 3918 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 3919 StoppointCallbackContext *context, 3920 lldb::user_id_t break_id, 3921 lldb::user_id_t break_loc_id) 3922 { 3923 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 3924 // run so I can stop it if that's what I want to do. 3925 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3926 if (log) 3927 log->Printf("Hit New Thread Notification breakpoint."); 3928 return false; 3929 } 3930 3931 3932 bool 3933 ProcessGDBRemote::StartNoticingNewThreads() 3934 { 3935 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3936 if (m_thread_create_bp_sp) 3937 { 3938 if (log && log->GetVerbose()) 3939 log->Printf("Enabled noticing new thread breakpoint."); 3940 m_thread_create_bp_sp->SetEnabled(true); 3941 } 3942 else 3943 { 3944 PlatformSP platform_sp (m_target.GetPlatform()); 3945 if (platform_sp) 3946 { 3947 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3948 if (m_thread_create_bp_sp) 3949 { 3950 if (log && log->GetVerbose()) 3951 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3952 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3953 } 3954 else 3955 { 3956 if (log) 3957 log->Printf("Failed to create new thread notification breakpoint."); 3958 } 3959 } 3960 } 3961 return m_thread_create_bp_sp.get() != NULL; 3962 } 3963 3964 bool 3965 ProcessGDBRemote::StopNoticingNewThreads() 3966 { 3967 Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3968 if (log && log->GetVerbose()) 3969 log->Printf ("Disabling new thread notification breakpoint."); 3970 3971 if (m_thread_create_bp_sp) 3972 m_thread_create_bp_sp->SetEnabled(false); 3973 3974 return true; 3975 } 3976 3977 DynamicLoader * 3978 ProcessGDBRemote::GetDynamicLoader () 3979 { 3980 if (m_dyld_ap.get() == NULL) 3981 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3982 return m_dyld_ap.get(); 3983 } 3984 3985 Error 3986 ProcessGDBRemote::SendEventData(const char *data) 3987 { 3988 int return_value; 3989 bool was_supported; 3990 3991 Error error; 3992 3993 return_value = m_gdb_comm.SendLaunchEventDataPacket (data, &was_supported); 3994 if (return_value != 0) 3995 { 3996 if (!was_supported) 3997 error.SetErrorString("Sending events is not supported for this process."); 3998 else 3999 error.SetErrorStringWithFormat("Error sending event data: %d.", return_value); 4000 } 4001 return error; 4002 } 4003 4004 const DataBufferSP 4005 ProcessGDBRemote::GetAuxvData() 4006 { 4007 DataBufferSP buf; 4008 if (m_gdb_comm.GetQXferAuxvReadSupported()) 4009 { 4010 std::string response_string; 4011 if (m_gdb_comm.SendPacketsAndConcatenateResponses("qXfer:auxv:read::", response_string) == GDBRemoteCommunication::PacketResult::Success) 4012 buf.reset(new DataBufferHeap(response_string.c_str(), response_string.length())); 4013 } 4014 return buf; 4015 } 4016 4017 StructuredData::ObjectSP 4018 ProcessGDBRemote::GetExtendedInfoForThread (lldb::tid_t tid) 4019 { 4020 StructuredData::ObjectSP object_sp; 4021 4022 if (m_gdb_comm.GetThreadExtendedInfoSupported()) 4023 { 4024 StructuredData::ObjectSP args_dict(new StructuredData::Dictionary()); 4025 SystemRuntime *runtime = GetSystemRuntime(); 4026 if (runtime) 4027 { 4028 runtime->AddThreadExtendedInfoPacketHints (args_dict); 4029 } 4030 args_dict->GetAsDictionary()->AddIntegerItem ("thread", tid); 4031 4032 StreamString packet; 4033 packet << "jThreadExtendedInfo:"; 4034 args_dict->Dump (packet); 4035 4036 // FIXME the final character of a JSON dictionary, '}', is the escape 4037 // character in gdb-remote binary mode. lldb currently doesn't escape 4038 // these characters in its packet output -- so we add the quoted version 4039 // of the } character here manually in case we talk to a debugserver which 4040 // un-escapes the characters at packet read time. 4041 packet << (char) (0x7d ^ 0x20); 4042 4043 StringExtractorGDBRemote response; 4044 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, false) == GDBRemoteCommunication::PacketResult::Success) 4045 { 4046 StringExtractorGDBRemote::ResponseType response_type = response.GetResponseType(); 4047 if (response_type == StringExtractorGDBRemote::eResponse) 4048 { 4049 if (!response.Empty()) 4050 { 4051 object_sp = StructuredData::ParseJSON (response.GetStringRef()); 4052 } 4053 } 4054 } 4055 } 4056 return object_sp; 4057 } 4058 4059 StructuredData::ObjectSP 4060 ProcessGDBRemote::GetLoadedDynamicLibrariesInfos (lldb::addr_t image_list_address, lldb::addr_t image_count) 4061 { 4062 StructuredData::ObjectSP object_sp; 4063 4064 if (m_gdb_comm.GetLoadedDynamicLibrariesInfosSupported()) 4065 { 4066 StructuredData::ObjectSP args_dict(new StructuredData::Dictionary()); 4067 args_dict->GetAsDictionary()->AddIntegerItem ("image_list_address", image_list_address); 4068 args_dict->GetAsDictionary()->AddIntegerItem ("image_count", image_count); 4069 4070 StreamString packet; 4071 packet << "jGetLoadedDynamicLibrariesInfos:"; 4072 args_dict->Dump (packet); 4073 4074 // FIXME the final character of a JSON dictionary, '}', is the escape 4075 // character in gdb-remote binary mode. lldb currently doesn't escape 4076 // these characters in its packet output -- so we add the quoted version 4077 // of the } character here manually in case we talk to a debugserver which 4078 // un-escapes the characters at packet read time. 4079 packet << (char) (0x7d ^ 0x20); 4080 4081 StringExtractorGDBRemote response; 4082 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, false) == GDBRemoteCommunication::PacketResult::Success) 4083 { 4084 StringExtractorGDBRemote::ResponseType response_type = response.GetResponseType(); 4085 if (response_type == StringExtractorGDBRemote::eResponse) 4086 { 4087 if (!response.Empty()) 4088 { 4089 // The packet has already had the 0x7d xor quoting stripped out at the 4090 // GDBRemoteCommunication packet receive level. 4091 object_sp = StructuredData::ParseJSON (response.GetStringRef()); 4092 } 4093 } 4094 } 4095 } 4096 return object_sp; 4097 } 4098 4099 4100 // Establish the largest memory read/write payloads we should use. 4101 // If the remote stub has a max packet size, stay under that size. 4102 // 4103 // If the remote stub's max packet size is crazy large, use a 4104 // reasonable largeish default. 4105 // 4106 // If the remote stub doesn't advertise a max packet size, use a 4107 // conservative default. 4108 4109 void 4110 ProcessGDBRemote::GetMaxMemorySize() 4111 { 4112 const uint64_t reasonable_largeish_default = 128 * 1024; 4113 const uint64_t conservative_default = 512; 4114 4115 if (m_max_memory_size == 0) 4116 { 4117 uint64_t stub_max_size = m_gdb_comm.GetRemoteMaxPacketSize(); 4118 if (stub_max_size != UINT64_MAX && stub_max_size != 0) 4119 { 4120 // Save the stub's claimed maximum packet size 4121 m_remote_stub_max_memory_size = stub_max_size; 4122 4123 // Even if the stub says it can support ginormous packets, 4124 // don't exceed our reasonable largeish default packet size. 4125 if (stub_max_size > reasonable_largeish_default) 4126 { 4127 stub_max_size = reasonable_largeish_default; 4128 } 4129 4130 m_max_memory_size = stub_max_size; 4131 } 4132 else 4133 { 4134 m_max_memory_size = conservative_default; 4135 } 4136 } 4137 } 4138 4139 void 4140 ProcessGDBRemote::SetUserSpecifiedMaxMemoryTransferSize (uint64_t user_specified_max) 4141 { 4142 if (user_specified_max != 0) 4143 { 4144 GetMaxMemorySize (); 4145 4146 if (m_remote_stub_max_memory_size != 0) 4147 { 4148 if (m_remote_stub_max_memory_size < user_specified_max) 4149 { 4150 m_max_memory_size = m_remote_stub_max_memory_size; // user specified a packet size too big, go as big 4151 // as the remote stub says we can go. 4152 } 4153 else 4154 { 4155 m_max_memory_size = user_specified_max; // user's packet size is good 4156 } 4157 } 4158 else 4159 { 4160 m_max_memory_size = user_specified_max; // user's packet size is probably fine 4161 } 4162 } 4163 } 4164 4165 bool 4166 ProcessGDBRemote::GetModuleSpec(const FileSpec& module_file_spec, 4167 const ArchSpec& arch, 4168 ModuleSpec &module_spec) 4169 { 4170 Log *log = GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PLATFORM); 4171 4172 if (!m_gdb_comm.GetModuleInfo (module_file_spec, arch, module_spec)) 4173 { 4174 if (log) 4175 log->Printf ("ProcessGDBRemote::%s - failed to get module info for %s:%s", 4176 __FUNCTION__, module_file_spec.GetPath ().c_str (), 4177 arch.GetTriple ().getTriple ().c_str ()); 4178 return false; 4179 } 4180 4181 if (log) 4182 { 4183 StreamString stream; 4184 module_spec.Dump (stream); 4185 log->Printf ("ProcessGDBRemote::%s - got module info for (%s:%s) : %s", 4186 __FUNCTION__, module_file_spec.GetPath ().c_str (), 4187 arch.GetTriple ().getTriple ().c_str (), stream.GetString ().c_str ()); 4188 } 4189 4190 return true; 4191 } 4192 4193 namespace { 4194 4195 typedef std::vector<std::string> stringVec; 4196 4197 typedef std::vector<struct GdbServerRegisterInfo> GDBServerRegisterVec; 4198 struct RegisterSetInfo 4199 { 4200 ConstString name; 4201 }; 4202 4203 typedef std::map<uint32_t, RegisterSetInfo> RegisterSetMap; 4204 4205 struct GdbServerTargetInfo 4206 { 4207 std::string arch; 4208 std::string osabi; 4209 stringVec includes; 4210 RegisterSetMap reg_set_map; 4211 XMLNode feature_node; 4212 }; 4213 4214 bool 4215 ParseRegisters (XMLNode feature_node, GdbServerTargetInfo &target_info, GDBRemoteDynamicRegisterInfo &dyn_reg_info) 4216 { 4217 if (!feature_node) 4218 return false; 4219 4220 uint32_t prev_reg_num = 0; 4221 uint32_t reg_offset = 0; 4222 4223 feature_node.ForEachChildElementWithName("reg", [&target_info, &dyn_reg_info, &prev_reg_num, ®_offset](const XMLNode ®_node) -> bool { 4224 std::string gdb_group; 4225 std::string gdb_type; 4226 ConstString reg_name; 4227 ConstString alt_name; 4228 ConstString set_name; 4229 std::vector<uint32_t> value_regs; 4230 std::vector<uint32_t> invalidate_regs; 4231 bool encoding_set = false; 4232 bool format_set = false; 4233 RegisterInfo reg_info = { NULL, // Name 4234 NULL, // Alt name 4235 0, // byte size 4236 reg_offset, // offset 4237 eEncodingUint, // encoding 4238 eFormatHex, // formate 4239 { 4240 LLDB_INVALID_REGNUM, // GCC reg num 4241 LLDB_INVALID_REGNUM, // DWARF reg num 4242 LLDB_INVALID_REGNUM, // generic reg num 4243 prev_reg_num, // GDB reg num 4244 prev_reg_num // native register number 4245 }, 4246 NULL, 4247 NULL 4248 }; 4249 4250 reg_node.ForEachAttribute([&target_info, &gdb_group, &gdb_type, ®_name, &alt_name, &set_name, &value_regs, &invalidate_regs, &encoding_set, &format_set, ®_info, &prev_reg_num, ®_offset](const llvm::StringRef &name, const llvm::StringRef &value) -> bool { 4251 if (name == "name") 4252 { 4253 reg_name.SetString(value); 4254 } 4255 else if (name == "bitsize") 4256 { 4257 reg_info.byte_size = StringConvert::ToUInt32(value.data(), 0, 0) / CHAR_BIT; 4258 } 4259 else if (name == "type") 4260 { 4261 gdb_type = value.str(); 4262 } 4263 else if (name == "group") 4264 { 4265 gdb_group = value.str(); 4266 } 4267 else if (name == "regnum") 4268 { 4269 const uint32_t regnum = StringConvert::ToUInt32(value.data(), LLDB_INVALID_REGNUM, 0); 4270 if (regnum != LLDB_INVALID_REGNUM) 4271 { 4272 reg_info.kinds[eRegisterKindGDB] = regnum; 4273 reg_info.kinds[eRegisterKindLLDB] = regnum; 4274 prev_reg_num = regnum; 4275 } 4276 } 4277 else if (name == "offset") 4278 { 4279 reg_offset = StringConvert::ToUInt32(value.data(), UINT32_MAX, 0); 4280 } 4281 else if (name == "altname") 4282 { 4283 alt_name.SetString(value); 4284 } 4285 else if (name == "encoding") 4286 { 4287 encoding_set = true; 4288 reg_info.encoding = Args::StringToEncoding (value.data(), eEncodingUint); 4289 } 4290 else if (name == "format") 4291 { 4292 format_set = true; 4293 Format format = eFormatInvalid; 4294 if (Args::StringToFormat (value.data(), format, NULL).Success()) 4295 reg_info.format = format; 4296 else if (value == "vector-sint8") 4297 reg_info.format = eFormatVectorOfSInt8; 4298 else if (value == "vector-uint8") 4299 reg_info.format = eFormatVectorOfUInt8; 4300 else if (value == "vector-sint16") 4301 reg_info.format = eFormatVectorOfSInt16; 4302 else if (value == "vector-uint16") 4303 reg_info.format = eFormatVectorOfUInt16; 4304 else if (value == "vector-sint32") 4305 reg_info.format = eFormatVectorOfSInt32; 4306 else if (value == "vector-uint32") 4307 reg_info.format = eFormatVectorOfUInt32; 4308 else if (value == "vector-float32") 4309 reg_info.format = eFormatVectorOfFloat32; 4310 else if (value == "vector-uint128") 4311 reg_info.format = eFormatVectorOfUInt128; 4312 } 4313 else if (name == "group_id") 4314 { 4315 const uint32_t set_id = StringConvert::ToUInt32(value.data(), UINT32_MAX, 0); 4316 RegisterSetMap::const_iterator pos = target_info.reg_set_map.find(set_id); 4317 if (pos != target_info.reg_set_map.end()) 4318 set_name = pos->second.name; 4319 } 4320 else if (name == "gcc_regnum") 4321 { 4322 reg_info.kinds[eRegisterKindGCC] = StringConvert::ToUInt32(value.data(), LLDB_INVALID_REGNUM, 0); 4323 } 4324 else if (name == "dwarf_regnum") 4325 { 4326 reg_info.kinds[eRegisterKindDWARF] = StringConvert::ToUInt32(value.data(), LLDB_INVALID_REGNUM, 0); 4327 } 4328 else if (name == "generic") 4329 { 4330 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister(value.data()); 4331 } 4332 else if (name == "value_regnums") 4333 { 4334 SplitCommaSeparatedRegisterNumberString(value, value_regs, 0); 4335 } 4336 else if (name == "invalidate_regnums") 4337 { 4338 SplitCommaSeparatedRegisterNumberString(value, invalidate_regs, 0); 4339 } 4340 else 4341 { 4342 printf("unhandled attribute %s = %s\n", name.data(), value.data()); 4343 } 4344 return true; // Keep iterating through all attributes 4345 }); 4346 4347 if (!gdb_type.empty() && !(encoding_set || format_set)) 4348 { 4349 if (gdb_type.find("int") == 0) 4350 { 4351 reg_info.format = eFormatHex; 4352 reg_info.encoding = eEncodingUint; 4353 } 4354 else if (gdb_type == "data_ptr" || gdb_type == "code_ptr") 4355 { 4356 reg_info.format = eFormatAddressInfo; 4357 reg_info.encoding = eEncodingUint; 4358 } 4359 else if (gdb_type == "i387_ext" || gdb_type == "float") 4360 { 4361 reg_info.format = eFormatFloat; 4362 reg_info.encoding = eEncodingIEEE754; 4363 } 4364 } 4365 4366 // Only update the register set name if we didn't get a "reg_set" attribute. 4367 // "set_name" will be empty if we didn't have a "reg_set" attribute. 4368 if (!set_name && !gdb_group.empty()) 4369 set_name.SetCString(gdb_group.c_str()); 4370 4371 reg_info.byte_offset = reg_offset; 4372 assert (reg_info.byte_size != 0); 4373 reg_offset += reg_info.byte_size; 4374 if (!value_regs.empty()) 4375 { 4376 value_regs.push_back(LLDB_INVALID_REGNUM); 4377 reg_info.value_regs = value_regs.data(); 4378 } 4379 if (!invalidate_regs.empty()) 4380 { 4381 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 4382 reg_info.invalidate_regs = invalidate_regs.data(); 4383 } 4384 4385 ++prev_reg_num; 4386 dyn_reg_info.AddRegister(reg_info, reg_name, alt_name, set_name); 4387 4388 return true; // Keep iterating through all "reg" elements 4389 }); 4390 return true; 4391 } 4392 4393 } // namespace {} 4394 4395 4396 // query the target of gdb-remote for extended target information 4397 // return: 'true' on success 4398 // 'false' on failure 4399 bool 4400 ProcessGDBRemote::GetGDBServerRegisterInfo () 4401 { 4402 // Make sure LLDB has an XML parser it can use first 4403 if (!XMLDocument::XMLEnabled()) 4404 return false; 4405 4406 // redirect libxml2's error handler since the default prints to stdout 4407 4408 GDBRemoteCommunicationClient & comm = m_gdb_comm; 4409 4410 // check that we have extended feature read support 4411 if ( !comm.GetQXferFeaturesReadSupported( ) ) 4412 return false; 4413 4414 // request the target xml file 4415 std::string raw; 4416 lldb_private::Error lldberr; 4417 if (!comm.ReadExtFeature(ConstString("features"), 4418 ConstString("target.xml"), 4419 raw, 4420 lldberr)) 4421 { 4422 return false; 4423 } 4424 4425 4426 XMLDocument xml_document; 4427 4428 if (xml_document.ParseMemory(raw.c_str(), raw.size(), "target.xml")) 4429 { 4430 GdbServerTargetInfo target_info; 4431 4432 XMLNode target_node = xml_document.GetRootElement("target"); 4433 if (target_node) 4434 { 4435 XMLNode feature_node; 4436 target_node.ForEachChildElement([&target_info, this, &feature_node](const XMLNode &node) -> bool 4437 { 4438 llvm::StringRef name = node.GetName(); 4439 if (name == "architecture") 4440 { 4441 node.GetElementText(target_info.arch); 4442 } 4443 else if (name == "osabi") 4444 { 4445 node.GetElementText(target_info.osabi); 4446 } 4447 else if (name == "xi:include" || name == "include") 4448 { 4449 llvm::StringRef href = node.GetAttributeValue("href"); 4450 if (!href.empty()) 4451 target_info.includes.push_back(href.str()); 4452 } 4453 else if (name == "feature") 4454 { 4455 feature_node = node; 4456 } 4457 else if (name == "groups") 4458 { 4459 node.ForEachChildElementWithName("group", [&target_info](const XMLNode &node) -> bool { 4460 uint32_t set_id = UINT32_MAX; 4461 RegisterSetInfo set_info; 4462 4463 node.ForEachAttribute([&set_id, &set_info](const llvm::StringRef &name, const llvm::StringRef &value) -> bool { 4464 if (name == "id") 4465 set_id = StringConvert::ToUInt32(value.data(), UINT32_MAX, 0); 4466 if (name == "name") 4467 set_info.name = ConstString(value); 4468 return true; // Keep iterating through all attributes 4469 }); 4470 4471 if (set_id != UINT32_MAX) 4472 target_info.reg_set_map[set_id] = set_info; 4473 return true; // Keep iterating through all "group" elements 4474 }); 4475 } 4476 return true; // Keep iterating through all children of the target_node 4477 }); 4478 4479 if (feature_node) 4480 { 4481 ParseRegisters(feature_node, target_info, this->m_register_info); 4482 } 4483 4484 for (const auto &include : target_info.includes) 4485 { 4486 // request register file 4487 std::string xml_data; 4488 if (!comm.ReadExtFeature(ConstString("features"), 4489 ConstString(include), 4490 xml_data, 4491 lldberr)) 4492 continue; 4493 4494 XMLDocument include_xml_document; 4495 include_xml_document.ParseMemory(xml_data.data(), xml_data.size(), include.c_str()); 4496 XMLNode include_feature_node = include_xml_document.GetRootElement("feature"); 4497 if (include_feature_node) 4498 { 4499 ParseRegisters(include_feature_node, target_info, this->m_register_info); 4500 } 4501 } 4502 this->m_register_info.Finalize(GetTarget().GetArchitecture()); 4503 } 4504 } 4505 4506 return m_register_info.GetNumRegisters() > 0; 4507 } 4508 4509 Error 4510 ProcessGDBRemote::GetLoadedModuleList (GDBLoadedModuleInfoList & list) 4511 { 4512 // Make sure LLDB has an XML parser it can use first 4513 if (!XMLDocument::XMLEnabled()) 4514 return Error (0, ErrorType::eErrorTypeGeneric); 4515 4516 Log *log = GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS); 4517 if (log) 4518 log->Printf ("ProcessGDBRemote::%s", __FUNCTION__); 4519 4520 GDBRemoteCommunicationClient & comm = m_gdb_comm; 4521 4522 // check that we have extended feature read support 4523 if (comm.GetQXferLibrariesSVR4ReadSupported ()) { 4524 list.clear (); 4525 4526 // request the loaded library list 4527 std::string raw; 4528 lldb_private::Error lldberr; 4529 4530 if (!comm.ReadExtFeature (ConstString ("libraries-svr4"), ConstString (""), raw, lldberr)) 4531 return Error (0, ErrorType::eErrorTypeGeneric); 4532 4533 // parse the xml file in memory 4534 if (log) 4535 log->Printf ("parsing: %s", raw.c_str()); 4536 XMLDocument doc; 4537 4538 if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml")) 4539 return Error (0, ErrorType::eErrorTypeGeneric); 4540 4541 XMLNode root_element = doc.GetRootElement("library-list-svr4"); 4542 if (!root_element) 4543 return Error(); 4544 4545 // main link map structure 4546 llvm::StringRef main_lm = root_element.GetAttributeValue("main-lm"); 4547 if (!main_lm.empty()) 4548 { 4549 list.m_link_map = StringConvert::ToUInt64(main_lm.data(), LLDB_INVALID_ADDRESS, 0); 4550 } 4551 4552 root_element.ForEachChildElementWithName("library", [log, &list](const XMLNode &library) -> bool { 4553 4554 GDBLoadedModuleInfoList::LoadedModuleInfo module; 4555 4556 library.ForEachAttribute([log, &module](const llvm::StringRef &name, const llvm::StringRef &value) -> bool { 4557 4558 if (name == "name") 4559 module.set_name (value.str()); 4560 else if (name == "lm") 4561 { 4562 // the address of the link_map struct. 4563 module.set_link_map(StringConvert::ToUInt64(value.data(), LLDB_INVALID_ADDRESS, 0)); 4564 } 4565 else if (name == "l_addr") 4566 { 4567 // the displacement as read from the field 'l_addr' of the link_map struct. 4568 module.set_base(StringConvert::ToUInt64(value.data(), LLDB_INVALID_ADDRESS, 0)); 4569 4570 } 4571 else if (name == "l_ld") 4572 { 4573 // the memory address of the libraries PT_DYAMIC section. 4574 module.set_dynamic(StringConvert::ToUInt64(value.data(), LLDB_INVALID_ADDRESS, 0)); 4575 } 4576 4577 return true; // Keep iterating over all properties of "library" 4578 }); 4579 4580 if (log) 4581 { 4582 std::string name; 4583 lldb::addr_t lm=0, base=0, ld=0; 4584 4585 module.get_name (name); 4586 module.get_link_map (lm); 4587 module.get_base (base); 4588 module.get_dynamic (ld); 4589 4590 log->Printf ("found (link_map:0x08%" PRIx64 ", base:0x08%" PRIx64 ", ld:0x08%" PRIx64 ", name:'%s')", lm, base, ld, name.c_str()); 4591 } 4592 4593 list.add (module); 4594 return true; // Keep iterating over all "library" elements in the root node 4595 }); 4596 4597 if (log) 4598 log->Printf ("found %" PRId32 " modules in total", (int) list.m_list.size()); 4599 } else if (comm.GetQXferLibrariesReadSupported ()) { 4600 list.clear (); 4601 4602 // request the loaded library list 4603 std::string raw; 4604 lldb_private::Error lldberr; 4605 4606 if (!comm.ReadExtFeature (ConstString ("libraries"), ConstString (""), raw, lldberr)) 4607 return Error (0, ErrorType::eErrorTypeGeneric); 4608 4609 if (log) 4610 log->Printf ("parsing: %s", raw.c_str()); 4611 XMLDocument doc; 4612 4613 if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml")) 4614 return Error (0, ErrorType::eErrorTypeGeneric); 4615 4616 XMLNode root_element = doc.GetRootElement("library-list"); 4617 if (!root_element) 4618 return Error(); 4619 4620 root_element.ForEachChildElementWithName("library", [log, &list](const XMLNode &library) -> bool { 4621 GDBLoadedModuleInfoList::LoadedModuleInfo module; 4622 4623 llvm::StringRef name = library.GetAttributeValue("name"); 4624 module.set_name(name.str()); 4625 4626 // The base address of a given library will be the address of its 4627 // first section. Most remotes send only one section for Windows 4628 // targets for example. 4629 const XMLNode §ion = library.FindFirstChildElementWithName("section"); 4630 llvm::StringRef address = section.GetAttributeValue("address"); 4631 module.set_base(StringConvert::ToUInt64(address.data(), LLDB_INVALID_ADDRESS, 0)); 4632 4633 if (log) 4634 { 4635 std::string name; 4636 lldb::addr_t base = 0; 4637 module.get_name (name); 4638 module.get_base (base); 4639 4640 log->Printf ("found (base:0x%" PRIx64 ", name:'%s')", base, name.c_str()); 4641 } 4642 4643 list.add (module); 4644 return true; // Keep iterating over all "library" elements in the root node 4645 }); 4646 4647 if (log) 4648 log->Printf ("found %" PRId32 " modules in total", (int) list.m_list.size()); 4649 } else { 4650 return Error (0, ErrorType::eErrorTypeGeneric); 4651 } 4652 4653 return Error(); 4654 } 4655 4656 lldb::ModuleSP 4657 ProcessGDBRemote::LoadModuleAtAddress (const FileSpec &file, lldb::addr_t base_addr) 4658 { 4659 Target &target = m_process->GetTarget(); 4660 ModuleList &modules = target.GetImages(); 4661 ModuleSP module_sp; 4662 4663 bool changed = false; 4664 4665 ModuleSpec module_spec (file, target.GetArchitecture()); 4666 if ((module_sp = modules.FindFirstModule (module_spec))) 4667 { 4668 module_sp->SetLoadAddress (target, base_addr, true, changed); 4669 } 4670 else if ((module_sp = target.GetSharedModule (module_spec))) 4671 { 4672 module_sp->SetLoadAddress (target, base_addr, true, changed); 4673 } 4674 4675 return module_sp; 4676 } 4677 4678 size_t 4679 ProcessGDBRemote::LoadModules () 4680 { 4681 using lldb_private::process_gdb_remote::ProcessGDBRemote; 4682 4683 // request a list of loaded libraries from GDBServer 4684 GDBLoadedModuleInfoList module_list; 4685 if (GetLoadedModuleList (module_list).Fail()) 4686 return 0; 4687 4688 // get a list of all the modules 4689 ModuleList new_modules; 4690 4691 for (GDBLoadedModuleInfoList::LoadedModuleInfo & modInfo : module_list.m_list) 4692 { 4693 std::string mod_name; 4694 lldb::addr_t mod_base; 4695 4696 bool valid = true; 4697 valid &= modInfo.get_name (mod_name); 4698 valid &= modInfo.get_base (mod_base); 4699 if (!valid) 4700 continue; 4701 4702 // hack (cleaner way to get file name only?) (win/unix compat?) 4703 size_t marker = mod_name.rfind ('/'); 4704 if (marker == std::string::npos) 4705 marker = 0; 4706 else 4707 marker += 1; 4708 4709 FileSpec file (mod_name.c_str()+marker, true); 4710 lldb::ModuleSP module_sp = LoadModuleAtAddress (file, mod_base); 4711 4712 if (module_sp.get()) 4713 new_modules.Append (module_sp); 4714 } 4715 4716 if (new_modules.GetSize() > 0) 4717 { 4718 Target & target = m_target; 4719 4720 new_modules.ForEach ([&target](const lldb::ModuleSP module_sp) -> bool 4721 { 4722 lldb_private::ObjectFile * obj = module_sp->GetObjectFile (); 4723 if (!obj) 4724 return true; 4725 4726 if (obj->GetType () != ObjectFile::Type::eTypeExecutable) 4727 return true; 4728 4729 lldb::ModuleSP module_copy_sp = module_sp; 4730 target.SetExecutableModule (module_copy_sp, false); 4731 return false; 4732 }); 4733 4734 ModuleList &loaded_modules = m_process->GetTarget().GetImages(); 4735 loaded_modules.AppendIfNeeded (new_modules); 4736 m_process->GetTarget().ModulesDidLoad (new_modules); 4737 } 4738 4739 return new_modules.GetSize(); 4740 } 4741 4742 Error 4743 ProcessGDBRemote::GetFileLoadAddress(const FileSpec& file, bool& is_loaded, lldb::addr_t& load_addr) 4744 { 4745 is_loaded = false; 4746 load_addr = LLDB_INVALID_ADDRESS; 4747 4748 std::string file_path = file.GetPath(false); 4749 if (file_path.empty ()) 4750 return Error("Empty file name specified"); 4751 4752 StreamString packet; 4753 packet.PutCString("qFileLoadAddress:"); 4754 packet.PutCStringAsRawHex8(file_path.c_str()); 4755 4756 StringExtractorGDBRemote response; 4757 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString().c_str(), response, false) != GDBRemoteCommunication::PacketResult::Success) 4758 return Error("Sending qFileLoadAddress packet failed"); 4759 4760 if (response.IsErrorResponse()) 4761 { 4762 if (response.GetError() == 1) 4763 { 4764 // The file is not loaded into the inferior 4765 is_loaded = false; 4766 load_addr = LLDB_INVALID_ADDRESS; 4767 return Error(); 4768 } 4769 4770 return Error("Fetching file load address from remote server returned an error"); 4771 } 4772 4773 if (response.IsNormalResponse()) 4774 { 4775 is_loaded = true; 4776 load_addr = response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS); 4777 return Error(); 4778 } 4779 4780 return Error("Unknown error happened during sending the load address packet"); 4781 } 4782 4783 4784 void 4785 ProcessGDBRemote::ModulesDidLoad (ModuleList &module_list) 4786 { 4787 // We must call the lldb_private::Process::ModulesDidLoad () first before we do anything 4788 Process::ModulesDidLoad (module_list); 4789 4790 // After loading shared libraries, we can ask our remote GDB server if 4791 // it needs any symbols. 4792 m_gdb_comm.ServeSymbolLookups(this); 4793 } 4794 4795 4796 class CommandObjectProcessGDBRemoteSpeedTest: public CommandObjectParsed 4797 { 4798 public: 4799 CommandObjectProcessGDBRemoteSpeedTest(CommandInterpreter &interpreter) : 4800 CommandObjectParsed (interpreter, 4801 "process plugin packet speed-test", 4802 "Tests packet speeds of various sizes to determine the performance characteristics of the GDB remote connection. ", 4803 NULL), 4804 m_option_group (interpreter), 4805 m_num_packets (LLDB_OPT_SET_1, false, "count", 'c', 0, eArgTypeCount, "The number of packets to send of each varying size (default is 1000).", 1000), 4806 m_max_send (LLDB_OPT_SET_1, false, "max-send", 's', 0, eArgTypeCount, "The maximum number of bytes to send in a packet. Sizes increase in powers of 2 while the size is less than or equal to this option value. (default 1024).", 1024), 4807 m_max_recv (LLDB_OPT_SET_1, false, "max-receive", 'r', 0, eArgTypeCount, "The maximum number of bytes to receive in a packet. Sizes increase in powers of 2 while the size is less than or equal to this option value. (default 1024).", 1024), 4808 m_json (LLDB_OPT_SET_1, false, "json", 'j', "Print the output as JSON data for easy parsing.", false, true) 4809 { 4810 m_option_group.Append (&m_num_packets, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1); 4811 m_option_group.Append (&m_max_send, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1); 4812 m_option_group.Append (&m_max_recv, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1); 4813 m_option_group.Append (&m_json, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1); 4814 m_option_group.Finalize(); 4815 } 4816 4817 ~CommandObjectProcessGDBRemoteSpeedTest () 4818 { 4819 } 4820 4821 4822 Options * 4823 GetOptions () override 4824 { 4825 return &m_option_group; 4826 } 4827 4828 bool 4829 DoExecute (Args& command, CommandReturnObject &result) override 4830 { 4831 const size_t argc = command.GetArgumentCount(); 4832 if (argc == 0) 4833 { 4834 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4835 if (process) 4836 { 4837 StreamSP output_stream_sp (m_interpreter.GetDebugger().GetAsyncOutputStream()); 4838 result.SetImmediateOutputStream (output_stream_sp); 4839 4840 const uint32_t num_packets = (uint32_t)m_num_packets.GetOptionValue().GetCurrentValue(); 4841 const uint64_t max_send = m_max_send.GetOptionValue().GetCurrentValue(); 4842 const uint64_t max_recv = m_max_recv.GetOptionValue().GetCurrentValue(); 4843 const bool json = m_json.GetOptionValue().GetCurrentValue(); 4844 if (output_stream_sp) 4845 process->GetGDBRemote().TestPacketSpeed (num_packets, max_send, max_recv, json, *output_stream_sp); 4846 else 4847 { 4848 process->GetGDBRemote().TestPacketSpeed (num_packets, max_send, max_recv, json, result.GetOutputStream()); 4849 } 4850 result.SetStatus (eReturnStatusSuccessFinishResult); 4851 return true; 4852 } 4853 } 4854 else 4855 { 4856 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 4857 } 4858 result.SetStatus (eReturnStatusFailed); 4859 return false; 4860 } 4861 protected: 4862 OptionGroupOptions m_option_group; 4863 OptionGroupUInt64 m_num_packets; 4864 OptionGroupUInt64 m_max_send; 4865 OptionGroupUInt64 m_max_recv; 4866 OptionGroupBoolean m_json; 4867 4868 }; 4869 4870 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 4871 { 4872 private: 4873 4874 public: 4875 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 4876 CommandObjectParsed (interpreter, 4877 "process plugin packet history", 4878 "Dumps the packet history buffer. ", 4879 NULL) 4880 { 4881 } 4882 4883 ~CommandObjectProcessGDBRemotePacketHistory () 4884 { 4885 } 4886 4887 bool 4888 DoExecute (Args& command, CommandReturnObject &result) override 4889 { 4890 const size_t argc = command.GetArgumentCount(); 4891 if (argc == 0) 4892 { 4893 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4894 if (process) 4895 { 4896 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 4897 result.SetStatus (eReturnStatusSuccessFinishResult); 4898 return true; 4899 } 4900 } 4901 else 4902 { 4903 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 4904 } 4905 result.SetStatus (eReturnStatusFailed); 4906 return false; 4907 } 4908 }; 4909 4910 class CommandObjectProcessGDBRemotePacketXferSize : public CommandObjectParsed 4911 { 4912 private: 4913 4914 public: 4915 CommandObjectProcessGDBRemotePacketXferSize(CommandInterpreter &interpreter) : 4916 CommandObjectParsed (interpreter, 4917 "process plugin packet xfer-size", 4918 "Maximum size that lldb will try to read/write one one chunk.", 4919 NULL) 4920 { 4921 } 4922 4923 ~CommandObjectProcessGDBRemotePacketXferSize () 4924 { 4925 } 4926 4927 bool 4928 DoExecute (Args& command, CommandReturnObject &result) override 4929 { 4930 const size_t argc = command.GetArgumentCount(); 4931 if (argc == 0) 4932 { 4933 result.AppendErrorWithFormat ("'%s' takes an argument to specify the max amount to be transferred when reading/writing", m_cmd_name.c_str()); 4934 result.SetStatus (eReturnStatusFailed); 4935 return false; 4936 } 4937 4938 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4939 if (process) 4940 { 4941 const char *packet_size = command.GetArgumentAtIndex(0); 4942 errno = 0; 4943 uint64_t user_specified_max = strtoul (packet_size, NULL, 10); 4944 if (errno == 0 && user_specified_max != 0) 4945 { 4946 process->SetUserSpecifiedMaxMemoryTransferSize (user_specified_max); 4947 result.SetStatus (eReturnStatusSuccessFinishResult); 4948 return true; 4949 } 4950 } 4951 result.SetStatus (eReturnStatusFailed); 4952 return false; 4953 } 4954 }; 4955 4956 4957 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 4958 { 4959 private: 4960 4961 public: 4962 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 4963 CommandObjectParsed (interpreter, 4964 "process plugin packet send", 4965 "Send a custom packet through the GDB remote protocol and print the answer. " 4966 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 4967 NULL) 4968 { 4969 } 4970 4971 ~CommandObjectProcessGDBRemotePacketSend () 4972 { 4973 } 4974 4975 bool 4976 DoExecute (Args& command, CommandReturnObject &result) override 4977 { 4978 const size_t argc = command.GetArgumentCount(); 4979 if (argc == 0) 4980 { 4981 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 4982 result.SetStatus (eReturnStatusFailed); 4983 return false; 4984 } 4985 4986 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 4987 if (process) 4988 { 4989 for (size_t i=0; i<argc; ++ i) 4990 { 4991 const char *packet_cstr = command.GetArgumentAtIndex(0); 4992 bool send_async = true; 4993 StringExtractorGDBRemote response; 4994 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 4995 result.SetStatus (eReturnStatusSuccessFinishResult); 4996 Stream &output_strm = result.GetOutputStream(); 4997 output_strm.Printf (" packet: %s\n", packet_cstr); 4998 std::string &response_str = response.GetStringRef(); 4999 5000 if (strstr(packet_cstr, "qGetProfileData") != NULL) 5001 { 5002 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 5003 } 5004 5005 if (response_str.empty()) 5006 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 5007 else 5008 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 5009 } 5010 } 5011 return true; 5012 } 5013 }; 5014 5015 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 5016 { 5017 private: 5018 5019 public: 5020 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 5021 CommandObjectRaw (interpreter, 5022 "process plugin packet monitor", 5023 "Send a qRcmd packet through the GDB remote protocol and print the response." 5024 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 5025 NULL) 5026 { 5027 } 5028 5029 ~CommandObjectProcessGDBRemotePacketMonitor () 5030 { 5031 } 5032 5033 bool 5034 DoExecute (const char *command, CommandReturnObject &result) override 5035 { 5036 if (command == NULL || command[0] == '\0') 5037 { 5038 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 5039 result.SetStatus (eReturnStatusFailed); 5040 return false; 5041 } 5042 5043 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 5044 if (process) 5045 { 5046 StreamString packet; 5047 packet.PutCString("qRcmd,"); 5048 packet.PutBytesAsRawHex8(command, strlen(command)); 5049 const char *packet_cstr = packet.GetString().c_str(); 5050 5051 bool send_async = true; 5052 StringExtractorGDBRemote response; 5053 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 5054 result.SetStatus (eReturnStatusSuccessFinishResult); 5055 Stream &output_strm = result.GetOutputStream(); 5056 output_strm.Printf (" packet: %s\n", packet_cstr); 5057 const std::string &response_str = response.GetStringRef(); 5058 5059 if (response_str.empty()) 5060 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 5061 else 5062 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 5063 } 5064 return true; 5065 } 5066 }; 5067 5068 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 5069 { 5070 private: 5071 5072 public: 5073 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 5074 CommandObjectMultiword (interpreter, 5075 "process plugin packet", 5076 "Commands that deal with GDB remote packets.", 5077 NULL) 5078 { 5079 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 5080 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 5081 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 5082 LoadSubCommand ("xfer-size", CommandObjectSP (new CommandObjectProcessGDBRemotePacketXferSize (interpreter))); 5083 LoadSubCommand ("speed-test", CommandObjectSP (new CommandObjectProcessGDBRemoteSpeedTest (interpreter))); 5084 } 5085 5086 ~CommandObjectProcessGDBRemotePacket () 5087 { 5088 } 5089 }; 5090 5091 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 5092 { 5093 public: 5094 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 5095 CommandObjectMultiword (interpreter, 5096 "process plugin", 5097 "A set of commands for operating on a ProcessGDBRemote process.", 5098 "process plugin <subcommand> [<subcommand-options>]") 5099 { 5100 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 5101 } 5102 5103 ~CommandObjectMultiwordProcessGDBRemote () 5104 { 5105 } 5106 }; 5107 5108 CommandObject * 5109 ProcessGDBRemote::GetPluginCommandObject() 5110 { 5111 if (!m_command_sp) 5112 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 5113 return m_command_sp.get(); 5114 } 5115