1 //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/lldb-python.h" 11 12 // C Includes 13 #include <errno.h> 14 #include <spawn.h> 15 #include <stdlib.h> 16 #include <netinet/in.h> 17 #include <sys/mman.h> // for mmap 18 #include <sys/stat.h> 19 #include <sys/types.h> 20 #include <time.h> 21 22 // C++ Includes 23 #include <algorithm> 24 #include <map> 25 26 // Other libraries and framework includes 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/Core/ConnectionFileDescriptor.h" 33 #include "lldb/Host/FileSpec.h" 34 #include "lldb/Core/InputReader.h" 35 #include "lldb/Core/Module.h" 36 #include "lldb/Core/ModuleSpec.h" 37 #include "lldb/Core/PluginManager.h" 38 #include "lldb/Core/State.h" 39 #include "lldb/Core/StreamFile.h" 40 #include "lldb/Core/StreamString.h" 41 #include "lldb/Core/Timer.h" 42 #include "lldb/Core/Value.h" 43 #include "lldb/Host/Symbols.h" 44 #include "lldb/Host/TimeValue.h" 45 #include "lldb/Interpreter/CommandInterpreter.h" 46 #include "lldb/Interpreter/CommandObject.h" 47 #include "lldb/Interpreter/CommandObjectMultiword.h" 48 #include "lldb/Interpreter/CommandReturnObject.h" 49 #include "lldb/Symbol/ObjectFile.h" 50 #include "lldb/Target/DynamicLoader.h" 51 #include "lldb/Target/Target.h" 52 #include "lldb/Target/TargetList.h" 53 #include "lldb/Target/ThreadPlanCallFunction.h" 54 #include "lldb/Utility/PseudoTerminal.h" 55 56 // Project includes 57 #include "lldb/Host/Host.h" 58 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 59 #include "Plugins/Process/Utility/StopInfoMachException.h" 60 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 61 #include "Utility/StringExtractorGDBRemote.h" 62 #include "GDBRemoteRegisterContext.h" 63 #include "ProcessGDBRemote.h" 64 #include "ProcessGDBRemoteLog.h" 65 #include "ThreadGDBRemote.h" 66 67 68 namespace lldb 69 { 70 // Provide a function that can easily dump the packet history if we know a 71 // ProcessGDBRemote * value (which we can get from logs or from debugging). 72 // We need the function in the lldb namespace so it makes it into the final 73 // executable since the LLDB shared library only exports stuff in the lldb 74 // namespace. This allows you to attach with a debugger and call this 75 // function and get the packet history dumped to a file. 76 void 77 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 78 { 79 lldb_private::StreamFile strm; 80 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 81 if (error.Success()) 82 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 83 } 84 } 85 86 #define DEBUGSERVER_BASENAME "debugserver" 87 using namespace lldb; 88 using namespace lldb_private; 89 90 91 namespace { 92 93 static PropertyDefinition 94 g_properties[] = 95 { 96 { "packet-timeout" , OptionValue::eTypeUInt64 , true , 1, NULL, NULL, "Specify the default packet timeout in seconds." }, 97 { NULL , OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL } 98 }; 99 100 enum 101 { 102 ePropertyPacketTimeout 103 }; 104 105 class PluginProperties : public Properties 106 { 107 public: 108 109 static ConstString 110 GetSettingName () 111 { 112 return ProcessGDBRemote::GetPluginNameStatic(); 113 } 114 115 PluginProperties() : 116 Properties () 117 { 118 m_collection_sp.reset (new OptionValueProperties(GetSettingName())); 119 m_collection_sp->Initialize(g_properties); 120 } 121 122 virtual 123 ~PluginProperties() 124 { 125 } 126 127 uint64_t 128 GetPacketTimeout() 129 { 130 const uint32_t idx = ePropertyPacketTimeout; 131 return m_collection_sp->GetPropertyAtIndexAsUInt64(NULL, idx, g_properties[idx].default_uint_value); 132 } 133 }; 134 135 typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP; 136 137 static const ProcessKDPPropertiesSP & 138 GetGlobalPluginProperties() 139 { 140 static ProcessKDPPropertiesSP g_settings_sp; 141 if (!g_settings_sp) 142 g_settings_sp.reset (new PluginProperties ()); 143 return g_settings_sp; 144 } 145 146 } // anonymous namespace end 147 148 static bool rand_initialized = false; 149 150 // TODO Randomly assigning a port is unsafe. We should get an unused 151 // ephemeral port from the kernel and make sure we reserve it before passing 152 // it to debugserver. 153 154 #if defined (__APPLE__) 155 #define LOW_PORT (IPPORT_RESERVED) 156 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 157 #else 158 #define LOW_PORT (1024u) 159 #define HIGH_PORT (49151u) 160 #endif 161 162 static inline uint16_t 163 get_random_port () 164 { 165 if (!rand_initialized) 166 { 167 time_t seed = time(NULL); 168 169 rand_initialized = true; 170 srand(seed); 171 } 172 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 173 } 174 175 176 lldb_private::ConstString 177 ProcessGDBRemote::GetPluginNameStatic() 178 { 179 static ConstString g_name("gdb-remote"); 180 return g_name; 181 } 182 183 const char * 184 ProcessGDBRemote::GetPluginDescriptionStatic() 185 { 186 return "GDB Remote protocol based debugging plug-in."; 187 } 188 189 void 190 ProcessGDBRemote::Terminate() 191 { 192 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 193 } 194 195 196 lldb::ProcessSP 197 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 198 { 199 lldb::ProcessSP process_sp; 200 if (crash_file_path == NULL) 201 process_sp.reset (new ProcessGDBRemote (target, listener)); 202 return process_sp; 203 } 204 205 bool 206 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 207 { 208 if (plugin_specified_by_name) 209 return true; 210 211 // For now we are just making sure the file exists for a given module 212 Module *exe_module = target.GetExecutableModulePointer(); 213 if (exe_module) 214 { 215 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 216 // We can't debug core files... 217 switch (exe_objfile->GetType()) 218 { 219 case ObjectFile::eTypeInvalid: 220 case ObjectFile::eTypeCoreFile: 221 case ObjectFile::eTypeDebugInfo: 222 case ObjectFile::eTypeObjectFile: 223 case ObjectFile::eTypeSharedLibrary: 224 case ObjectFile::eTypeStubLibrary: 225 return false; 226 case ObjectFile::eTypeExecutable: 227 case ObjectFile::eTypeDynamicLinker: 228 case ObjectFile::eTypeUnknown: 229 break; 230 } 231 return exe_module->GetFileSpec().Exists(); 232 } 233 // However, if there is no executable module, we return true since we might be preparing to attach. 234 return true; 235 } 236 237 //---------------------------------------------------------------------- 238 // ProcessGDBRemote constructor 239 //---------------------------------------------------------------------- 240 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 241 Process (target, listener), 242 m_flags (0), 243 m_gdb_comm(false), 244 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 245 m_last_stop_packet (), 246 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 247 m_register_info (), 248 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 249 m_async_thread (LLDB_INVALID_HOST_THREAD), 250 m_async_thread_state(eAsyncThreadNotStarted), 251 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 252 m_thread_ids (), 253 m_continue_c_tids (), 254 m_continue_C_tids (), 255 m_continue_s_tids (), 256 m_continue_S_tids (), 257 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 258 m_max_memory_size (512), 259 m_addr_to_mmap_size (), 260 m_thread_create_bp_sp (), 261 m_waiting_for_attach (false), 262 m_destroy_tried_resuming (false), 263 m_command_sp () 264 { 265 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 266 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 267 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 268 const uint64_t timeout_seconds = GetGlobalPluginProperties()->GetPacketTimeout(); 269 if (timeout_seconds > 0) 270 m_gdb_comm.SetPacketTimeout(timeout_seconds); 271 } 272 273 //---------------------------------------------------------------------- 274 // Destructor 275 //---------------------------------------------------------------------- 276 ProcessGDBRemote::~ProcessGDBRemote() 277 { 278 // m_mach_process.UnregisterNotificationCallbacks (this); 279 Clear(); 280 // We need to call finalize on the process before destroying ourselves 281 // to make sure all of the broadcaster cleanup goes as planned. If we 282 // destruct this class, then Process::~Process() might have problems 283 // trying to fully destroy the broadcaster. 284 Finalize(); 285 286 // The general Finalize is going to try to destroy the process and that SHOULD 287 // shut down the async thread. However, if we don't kill it it will get stranded and 288 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 289 StopAsyncThread(); 290 KillDebugserverProcess(); 291 } 292 293 //---------------------------------------------------------------------- 294 // PluginInterface 295 //---------------------------------------------------------------------- 296 ConstString 297 ProcessGDBRemote::GetPluginName() 298 { 299 return GetPluginNameStatic(); 300 } 301 302 uint32_t 303 ProcessGDBRemote::GetPluginVersion() 304 { 305 return 1; 306 } 307 308 void 309 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 310 { 311 if (!force && m_register_info.GetNumRegisters() > 0) 312 return; 313 314 char packet[128]; 315 m_register_info.Clear(); 316 uint32_t reg_offset = 0; 317 uint32_t reg_num = 0; 318 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 319 response_type == StringExtractorGDBRemote::eResponse; 320 ++reg_num) 321 { 322 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 323 assert (packet_len < (int)sizeof(packet)); 324 StringExtractorGDBRemote response; 325 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 326 { 327 response_type = response.GetResponseType(); 328 if (response_type == StringExtractorGDBRemote::eResponse) 329 { 330 std::string name; 331 std::string value; 332 ConstString reg_name; 333 ConstString alt_name; 334 ConstString set_name; 335 std::vector<uint32_t> value_regs; 336 std::vector<uint32_t> invalidate_regs; 337 RegisterInfo reg_info = { NULL, // Name 338 NULL, // Alt name 339 0, // byte size 340 reg_offset, // offset 341 eEncodingUint, // encoding 342 eFormatHex, // formate 343 { 344 LLDB_INVALID_REGNUM, // GCC reg num 345 LLDB_INVALID_REGNUM, // DWARF reg num 346 LLDB_INVALID_REGNUM, // generic reg num 347 reg_num, // GDB reg num 348 reg_num // native register number 349 }, 350 NULL, 351 NULL 352 }; 353 354 while (response.GetNameColonValue(name, value)) 355 { 356 if (name.compare("name") == 0) 357 { 358 reg_name.SetCString(value.c_str()); 359 } 360 else if (name.compare("alt-name") == 0) 361 { 362 alt_name.SetCString(value.c_str()); 363 } 364 else if (name.compare("bitsize") == 0) 365 { 366 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 367 } 368 else if (name.compare("offset") == 0) 369 { 370 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 371 if (reg_offset != offset) 372 { 373 reg_offset = offset; 374 } 375 } 376 else if (name.compare("encoding") == 0) 377 { 378 const Encoding encoding = Args::StringToEncoding (value.c_str()); 379 if (encoding != eEncodingInvalid) 380 reg_info.encoding = encoding; 381 } 382 else if (name.compare("format") == 0) 383 { 384 Format format = eFormatInvalid; 385 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 386 reg_info.format = format; 387 else if (value.compare("binary") == 0) 388 reg_info.format = eFormatBinary; 389 else if (value.compare("decimal") == 0) 390 reg_info.format = eFormatDecimal; 391 else if (value.compare("hex") == 0) 392 reg_info.format = eFormatHex; 393 else if (value.compare("float") == 0) 394 reg_info.format = eFormatFloat; 395 else if (value.compare("vector-sint8") == 0) 396 reg_info.format = eFormatVectorOfSInt8; 397 else if (value.compare("vector-uint8") == 0) 398 reg_info.format = eFormatVectorOfUInt8; 399 else if (value.compare("vector-sint16") == 0) 400 reg_info.format = eFormatVectorOfSInt16; 401 else if (value.compare("vector-uint16") == 0) 402 reg_info.format = eFormatVectorOfUInt16; 403 else if (value.compare("vector-sint32") == 0) 404 reg_info.format = eFormatVectorOfSInt32; 405 else if (value.compare("vector-uint32") == 0) 406 reg_info.format = eFormatVectorOfUInt32; 407 else if (value.compare("vector-float32") == 0) 408 reg_info.format = eFormatVectorOfFloat32; 409 else if (value.compare("vector-uint128") == 0) 410 reg_info.format = eFormatVectorOfUInt128; 411 } 412 else if (name.compare("set") == 0) 413 { 414 set_name.SetCString(value.c_str()); 415 } 416 else if (name.compare("gcc") == 0) 417 { 418 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 419 } 420 else if (name.compare("dwarf") == 0) 421 { 422 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 423 } 424 else if (name.compare("generic") == 0) 425 { 426 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 427 } 428 else if (name.compare("container-regs") == 0) 429 { 430 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 431 value_pair.second = value; 432 do 433 { 434 value_pair = value_pair.second.split(','); 435 if (!value_pair.first.empty()) 436 { 437 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 438 if (reg != LLDB_INVALID_REGNUM) 439 value_regs.push_back (reg); 440 } 441 } while (!value_pair.second.empty()); 442 } 443 else if (name.compare("invalidate-regs") == 0) 444 { 445 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 446 value_pair.second = value; 447 do 448 { 449 value_pair = value_pair.second.split(','); 450 if (!value_pair.first.empty()) 451 { 452 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 453 if (reg != LLDB_INVALID_REGNUM) 454 invalidate_regs.push_back (reg); 455 } 456 } while (!value_pair.second.empty()); 457 } 458 } 459 460 reg_info.byte_offset = reg_offset; 461 assert (reg_info.byte_size != 0); 462 reg_offset += reg_info.byte_size; 463 if (!value_regs.empty()) 464 { 465 value_regs.push_back(LLDB_INVALID_REGNUM); 466 reg_info.value_regs = value_regs.data(); 467 } 468 if (!invalidate_regs.empty()) 469 { 470 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 471 reg_info.invalidate_regs = invalidate_regs.data(); 472 } 473 474 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 475 } 476 } 477 else 478 { 479 break; 480 } 481 } 482 483 // We didn't get anything if the accumulated reg_num is zero. See if we are 484 // debugging ARM and fill with a hard coded register set until we can get an 485 // updated debugserver down on the devices. 486 // On the other hand, if the accumulated reg_num is positive, see if we can 487 // add composite registers to the existing primordial ones. 488 bool from_scratch = (reg_num == 0); 489 490 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 491 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 492 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 493 494 // Use the process' architecture instead of the host arch, if available 495 ArchSpec remote_arch; 496 if (remote_process_arch.IsValid ()) 497 remote_arch = remote_process_arch; 498 else 499 remote_arch = remote_host_arch; 500 501 if (!target_arch.IsValid()) 502 { 503 if (remote_arch.IsValid() 504 && remote_arch.GetMachine() == llvm::Triple::arm 505 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 506 m_register_info.HardcodeARMRegisters(from_scratch); 507 } 508 else if (target_arch.GetMachine() == llvm::Triple::arm) 509 { 510 m_register_info.HardcodeARMRegisters(from_scratch); 511 } 512 513 // At this point, we can finalize our register info. 514 m_register_info.Finalize (); 515 } 516 517 Error 518 ProcessGDBRemote::WillLaunch (Module* module) 519 { 520 return WillLaunchOrAttach (); 521 } 522 523 Error 524 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 525 { 526 return WillLaunchOrAttach (); 527 } 528 529 Error 530 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 531 { 532 return WillLaunchOrAttach (); 533 } 534 535 Error 536 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 537 { 538 Error error (WillLaunchOrAttach ()); 539 540 if (error.Fail()) 541 return error; 542 543 error = ConnectToDebugserver (remote_url); 544 545 if (error.Fail()) 546 return error; 547 StartAsyncThread (); 548 549 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 550 if (pid == LLDB_INVALID_PROCESS_ID) 551 { 552 // We don't have a valid process ID, so note that we are connected 553 // and could now request to launch or attach, or get remote process 554 // listings... 555 SetPrivateState (eStateConnected); 556 } 557 else 558 { 559 // We have a valid process 560 SetID (pid); 561 GetThreadList(); 562 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 563 { 564 const StateType state = SetThreadStopInfo (m_last_stop_packet); 565 if (state == eStateStopped) 566 { 567 SetPrivateState (state); 568 } 569 else 570 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 571 } 572 else 573 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 574 } 575 576 if (error.Success() 577 && !GetTarget().GetArchitecture().IsValid() 578 && m_gdb_comm.GetHostArchitecture().IsValid()) 579 { 580 // Prefer the *process'* architecture over that of the *host*, if available. 581 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 582 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 583 else 584 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 585 } 586 587 return error; 588 } 589 590 Error 591 ProcessGDBRemote::WillLaunchOrAttach () 592 { 593 Error error; 594 m_stdio_communication.Clear (); 595 return error; 596 } 597 598 //---------------------------------------------------------------------- 599 // Process Control 600 //---------------------------------------------------------------------- 601 Error 602 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 603 { 604 Error error; 605 606 uint32_t launch_flags = launch_info.GetFlags().Get(); 607 const char *stdin_path = NULL; 608 const char *stdout_path = NULL; 609 const char *stderr_path = NULL; 610 const char *working_dir = launch_info.GetWorkingDirectory(); 611 612 const ProcessLaunchInfo::FileAction *file_action; 613 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 614 if (file_action) 615 { 616 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 617 stdin_path = file_action->GetPath(); 618 } 619 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 620 if (file_action) 621 { 622 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 623 stdout_path = file_action->GetPath(); 624 } 625 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 626 if (file_action) 627 { 628 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 629 stderr_path = file_action->GetPath(); 630 } 631 632 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 633 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 634 // ::LogSetLogFile ("/dev/stdout"); 635 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 636 637 ObjectFile * object_file = exe_module->GetObjectFile(); 638 if (object_file) 639 { 640 char host_port[128]; 641 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 642 char connect_url[128]; 643 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 644 645 // Make sure we aren't already connected? 646 if (!m_gdb_comm.IsConnected()) 647 { 648 error = StartDebugserverProcess (host_port, launch_info); 649 if (error.Fail()) 650 { 651 if (log) 652 log->Printf("failed to start debugserver process: %s", error.AsCString()); 653 return error; 654 } 655 656 error = ConnectToDebugserver (connect_url); 657 } 658 659 if (error.Success()) 660 { 661 lldb_utility::PseudoTerminal pty; 662 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 663 664 // If the debugserver is local and we aren't disabling STDIO, lets use 665 // a pseudo terminal to instead of relying on the 'O' packets for stdio 666 // since 'O' packets can really slow down debugging if the inferior 667 // does a lot of output. 668 PlatformSP platform_sp (m_target.GetPlatform()); 669 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 670 { 671 const char *slave_name = NULL; 672 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 673 { 674 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 675 slave_name = pty.GetSlaveName (NULL, 0); 676 } 677 if (stdin_path == NULL) 678 stdin_path = slave_name; 679 680 if (stdout_path == NULL) 681 stdout_path = slave_name; 682 683 if (stderr_path == NULL) 684 stderr_path = slave_name; 685 } 686 687 // Set STDIN to /dev/null if we want STDIO disabled or if either 688 // STDOUT or STDERR have been set to something and STDIN hasn't 689 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 690 stdin_path = "/dev/null"; 691 692 // Set STDOUT to /dev/null if we want STDIO disabled or if either 693 // STDIN or STDERR have been set to something and STDOUT hasn't 694 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 695 stdout_path = "/dev/null"; 696 697 // Set STDERR to /dev/null if we want STDIO disabled or if either 698 // STDIN or STDOUT have been set to something and STDERR hasn't 699 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 700 stderr_path = "/dev/null"; 701 702 if (stdin_path) 703 m_gdb_comm.SetSTDIN (stdin_path); 704 if (stdout_path) 705 m_gdb_comm.SetSTDOUT (stdout_path); 706 if (stderr_path) 707 m_gdb_comm.SetSTDERR (stderr_path); 708 709 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 710 711 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 712 713 if (working_dir && working_dir[0]) 714 { 715 m_gdb_comm.SetWorkingDir (working_dir); 716 } 717 718 // Send the environment and the program + arguments after we connect 719 const Args &environment = launch_info.GetEnvironmentEntries(); 720 if (environment.GetArgumentCount()) 721 { 722 size_t num_environment_entries = environment.GetArgumentCount(); 723 for (size_t i=0; i<num_environment_entries; ++i) 724 { 725 const char *env_entry = environment.GetArgumentAtIndex(i); 726 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 727 break; 728 } 729 } 730 731 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 732 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 733 if (arg_packet_err == 0) 734 { 735 std::string error_str; 736 if (m_gdb_comm.GetLaunchSuccess (error_str)) 737 { 738 SetID (m_gdb_comm.GetCurrentProcessID ()); 739 } 740 else 741 { 742 error.SetErrorString (error_str.c_str()); 743 } 744 } 745 else 746 { 747 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 748 } 749 750 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 751 752 if (GetID() == LLDB_INVALID_PROCESS_ID) 753 { 754 if (log) 755 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 756 KillDebugserverProcess (); 757 return error; 758 } 759 760 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 761 { 762 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 763 764 if (!disable_stdio) 765 { 766 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 767 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 768 } 769 } 770 } 771 else 772 { 773 if (log) 774 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 775 } 776 } 777 else 778 { 779 // Set our user ID to an invalid process ID. 780 SetID(LLDB_INVALID_PROCESS_ID); 781 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 782 exe_module->GetFileSpec().GetFilename().AsCString(), 783 exe_module->GetArchitecture().GetArchitectureName()); 784 } 785 return error; 786 787 } 788 789 790 Error 791 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 792 { 793 Error error; 794 // Sleep and wait a bit for debugserver to start to listen... 795 std::unique_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 796 if (conn_ap.get()) 797 { 798 const uint32_t max_retry_count = 50; 799 uint32_t retry_count = 0; 800 while (!m_gdb_comm.IsConnected()) 801 { 802 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 803 { 804 m_gdb_comm.SetConnection (conn_ap.release()); 805 break; 806 } 807 else if (error.WasInterrupted()) 808 { 809 // If we were interrupted, don't keep retrying. 810 break; 811 } 812 813 retry_count++; 814 815 if (retry_count >= max_retry_count) 816 break; 817 818 usleep (100000); 819 } 820 } 821 822 if (!m_gdb_comm.IsConnected()) 823 { 824 if (error.Success()) 825 error.SetErrorString("not connected to remote gdb server"); 826 return error; 827 } 828 829 // We always seem to be able to open a connection to a local port 830 // so we need to make sure we can then send data to it. If we can't 831 // then we aren't actually connected to anything, so try and do the 832 // handshake with the remote GDB server and make sure that goes 833 // alright. 834 if (!m_gdb_comm.HandshakeWithServer (NULL)) 835 { 836 m_gdb_comm.Disconnect(); 837 if (error.Success()) 838 error.SetErrorString("not connected to remote gdb server"); 839 return error; 840 } 841 m_gdb_comm.ResetDiscoverableSettings(); 842 m_gdb_comm.QueryNoAckModeSupported (); 843 m_gdb_comm.GetThreadSuffixSupported (); 844 m_gdb_comm.GetListThreadsInStopReplySupported (); 845 m_gdb_comm.GetHostInfo (); 846 m_gdb_comm.GetVContSupported ('c'); 847 m_gdb_comm.GetVAttachOrWaitSupported(); 848 849 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 850 for (size_t idx = 0; idx < num_cmds; idx++) 851 { 852 StringExtractorGDBRemote response; 853 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 854 } 855 return error; 856 } 857 858 void 859 ProcessGDBRemote::DidLaunchOrAttach () 860 { 861 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 862 if (log) 863 log->Printf ("ProcessGDBRemote::DidLaunch()"); 864 if (GetID() != LLDB_INVALID_PROCESS_ID) 865 { 866 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 867 868 BuildDynamicRegisterInfo (false); 869 870 // See if the GDB server supports the qHostInfo information 871 872 ArchSpec gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 873 874 // See if the GDB server supports the qProcessInfo packet, if so 875 // prefer that over the Host information as it will be more specific 876 // to our process. 877 878 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 879 gdb_remote_arch = m_gdb_comm.GetProcessArchitecture(); 880 881 if (gdb_remote_arch.IsValid()) 882 { 883 ArchSpec &target_arch = GetTarget().GetArchitecture(); 884 885 if (target_arch.IsValid()) 886 { 887 // If the remote host is ARM and we have apple as the vendor, then 888 // ARM executables and shared libraries can have mixed ARM architectures. 889 // You can have an armv6 executable, and if the host is armv7, then the 890 // system will load the best possible architecture for all shared libraries 891 // it has, so we really need to take the remote host architecture as our 892 // defacto architecture in this case. 893 894 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 895 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 896 { 897 target_arch = gdb_remote_arch; 898 } 899 else 900 { 901 // Fill in what is missing in the triple 902 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 903 llvm::Triple &target_triple = target_arch.GetTriple(); 904 if (target_triple.getVendorName().size() == 0) 905 { 906 target_triple.setVendor (remote_triple.getVendor()); 907 908 if (target_triple.getOSName().size() == 0) 909 { 910 target_triple.setOS (remote_triple.getOS()); 911 912 if (target_triple.getEnvironmentName().size() == 0) 913 target_triple.setEnvironment (remote_triple.getEnvironment()); 914 } 915 } 916 } 917 } 918 else 919 { 920 // The target doesn't have a valid architecture yet, set it from 921 // the architecture we got from the remote GDB server 922 target_arch = gdb_remote_arch; 923 } 924 } 925 } 926 } 927 928 void 929 ProcessGDBRemote::DidLaunch () 930 { 931 DidLaunchOrAttach (); 932 } 933 934 Error 935 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 936 { 937 ProcessAttachInfo attach_info; 938 return DoAttachToProcessWithID(attach_pid, attach_info); 939 } 940 941 Error 942 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 943 { 944 Error error; 945 // Clear out and clean up from any current state 946 Clear(); 947 if (attach_pid != LLDB_INVALID_PROCESS_ID) 948 { 949 // Make sure we aren't already connected? 950 if (!m_gdb_comm.IsConnected()) 951 { 952 char host_port[128]; 953 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 954 char connect_url[128]; 955 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 956 957 error = StartDebugserverProcess (host_port, attach_info); 958 959 if (error.Fail()) 960 { 961 const char *error_string = error.AsCString(); 962 if (error_string == NULL) 963 error_string = "unable to launch " DEBUGSERVER_BASENAME; 964 965 SetExitStatus (-1, error_string); 966 } 967 else 968 { 969 error = ConnectToDebugserver (connect_url); 970 } 971 } 972 973 if (error.Success()) 974 { 975 char packet[64]; 976 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 977 SetID (attach_pid); 978 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 979 } 980 } 981 return error; 982 } 983 984 size_t 985 ProcessGDBRemote::AttachInputReaderCallback 986 ( 987 void *baton, 988 InputReader *reader, 989 lldb::InputReaderAction notification, 990 const char *bytes, 991 size_t bytes_len 992 ) 993 { 994 if (notification == eInputReaderGotToken) 995 { 996 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 997 if (gdb_process->m_waiting_for_attach) 998 gdb_process->m_waiting_for_attach = false; 999 reader->SetIsDone(true); 1000 return 1; 1001 } 1002 return 0; 1003 } 1004 1005 Error 1006 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 1007 { 1008 Error error; 1009 // Clear out and clean up from any current state 1010 Clear(); 1011 1012 if (process_name && process_name[0]) 1013 { 1014 // Make sure we aren't already connected? 1015 if (!m_gdb_comm.IsConnected()) 1016 { 1017 char host_port[128]; 1018 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 1019 char connect_url[128]; 1020 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 1021 1022 error = StartDebugserverProcess (host_port, attach_info); 1023 if (error.Fail()) 1024 { 1025 const char *error_string = error.AsCString(); 1026 if (error_string == NULL) 1027 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1028 1029 SetExitStatus (-1, error_string); 1030 } 1031 else 1032 { 1033 error = ConnectToDebugserver (connect_url); 1034 } 1035 } 1036 1037 if (error.Success()) 1038 { 1039 StreamString packet; 1040 1041 if (wait_for_launch) 1042 { 1043 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1044 { 1045 packet.PutCString ("vAttachWait"); 1046 } 1047 else 1048 { 1049 if (attach_info.GetIgnoreExisting()) 1050 packet.PutCString("vAttachWait"); 1051 else 1052 packet.PutCString ("vAttachOrWait"); 1053 } 1054 } 1055 else 1056 packet.PutCString("vAttachName"); 1057 packet.PutChar(';'); 1058 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1059 1060 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1061 1062 } 1063 } 1064 return error; 1065 } 1066 1067 1068 void 1069 ProcessGDBRemote::DidAttach () 1070 { 1071 DidLaunchOrAttach (); 1072 } 1073 1074 1075 Error 1076 ProcessGDBRemote::WillResume () 1077 { 1078 m_continue_c_tids.clear(); 1079 m_continue_C_tids.clear(); 1080 m_continue_s_tids.clear(); 1081 m_continue_S_tids.clear(); 1082 return Error(); 1083 } 1084 1085 Error 1086 ProcessGDBRemote::DoResume () 1087 { 1088 Error error; 1089 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1090 if (log) 1091 log->Printf ("ProcessGDBRemote::Resume()"); 1092 1093 Listener listener ("gdb-remote.resume-packet-sent"); 1094 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1095 { 1096 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1097 1098 const size_t num_threads = GetThreadList().GetSize(); 1099 1100 StreamString continue_packet; 1101 bool continue_packet_error = false; 1102 if (m_gdb_comm.HasAnyVContSupport ()) 1103 { 1104 if (m_continue_c_tids.size() == num_threads) 1105 { 1106 // All threads are continuing, just send a "c" packet 1107 continue_packet.PutCString ("c"); 1108 } 1109 else 1110 { 1111 continue_packet.PutCString ("vCont"); 1112 1113 if (!m_continue_c_tids.empty()) 1114 { 1115 if (m_gdb_comm.GetVContSupported ('c')) 1116 { 1117 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) 1118 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1119 } 1120 else 1121 continue_packet_error = true; 1122 } 1123 1124 if (!continue_packet_error && !m_continue_C_tids.empty()) 1125 { 1126 if (m_gdb_comm.GetVContSupported ('C')) 1127 { 1128 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) 1129 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1130 } 1131 else 1132 continue_packet_error = true; 1133 } 1134 1135 if (!continue_packet_error && !m_continue_s_tids.empty()) 1136 { 1137 if (m_gdb_comm.GetVContSupported ('s')) 1138 { 1139 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) 1140 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1141 } 1142 else 1143 continue_packet_error = true; 1144 } 1145 1146 if (!continue_packet_error && !m_continue_S_tids.empty()) 1147 { 1148 if (m_gdb_comm.GetVContSupported ('S')) 1149 { 1150 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) 1151 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1152 } 1153 else 1154 continue_packet_error = true; 1155 } 1156 1157 if (continue_packet_error) 1158 continue_packet.GetString().clear(); 1159 } 1160 } 1161 else 1162 continue_packet_error = true; 1163 1164 if (continue_packet_error) 1165 { 1166 // Either no vCont support, or we tried to use part of the vCont 1167 // packet that wasn't supported by the remote GDB server. 1168 // We need to try and make a simple packet that can do our continue 1169 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1170 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1171 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1172 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1173 if (num_continue_c_tids > 0) 1174 { 1175 if (num_continue_c_tids == num_threads) 1176 { 1177 // All threads are resuming... 1178 m_gdb_comm.SetCurrentThreadForRun (-1); 1179 continue_packet.PutChar ('c'); 1180 continue_packet_error = false; 1181 } 1182 else if (num_continue_c_tids == 1 && 1183 num_continue_C_tids == 0 && 1184 num_continue_s_tids == 0 && 1185 num_continue_S_tids == 0 ) 1186 { 1187 // Only one thread is continuing 1188 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1189 continue_packet.PutChar ('c'); 1190 continue_packet_error = false; 1191 } 1192 } 1193 1194 if (continue_packet_error && num_continue_C_tids > 0) 1195 { 1196 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1197 num_continue_C_tids > 0 && 1198 num_continue_s_tids == 0 && 1199 num_continue_S_tids == 0 ) 1200 { 1201 const int continue_signo = m_continue_C_tids.front().second; 1202 // Only one thread is continuing 1203 if (num_continue_C_tids > 1) 1204 { 1205 // More that one thread with a signal, yet we don't have 1206 // vCont support and we are being asked to resume each 1207 // thread with a signal, we need to make sure they are 1208 // all the same signal, or we can't issue the continue 1209 // accurately with the current support... 1210 if (num_continue_C_tids > 1) 1211 { 1212 continue_packet_error = false; 1213 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1214 { 1215 if (m_continue_C_tids[i].second != continue_signo) 1216 continue_packet_error = true; 1217 } 1218 } 1219 if (!continue_packet_error) 1220 m_gdb_comm.SetCurrentThreadForRun (-1); 1221 } 1222 else 1223 { 1224 // Set the continue thread ID 1225 continue_packet_error = false; 1226 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1227 } 1228 if (!continue_packet_error) 1229 { 1230 // Add threads continuing with the same signo... 1231 continue_packet.Printf("C%2.2x", continue_signo); 1232 } 1233 } 1234 } 1235 1236 if (continue_packet_error && num_continue_s_tids > 0) 1237 { 1238 if (num_continue_s_tids == num_threads) 1239 { 1240 // All threads are resuming... 1241 m_gdb_comm.SetCurrentThreadForRun (-1); 1242 continue_packet.PutChar ('s'); 1243 continue_packet_error = false; 1244 } 1245 else if (num_continue_c_tids == 0 && 1246 num_continue_C_tids == 0 && 1247 num_continue_s_tids == 1 && 1248 num_continue_S_tids == 0 ) 1249 { 1250 // Only one thread is stepping 1251 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1252 continue_packet.PutChar ('s'); 1253 continue_packet_error = false; 1254 } 1255 } 1256 1257 if (!continue_packet_error && num_continue_S_tids > 0) 1258 { 1259 if (num_continue_S_tids == num_threads) 1260 { 1261 const int step_signo = m_continue_S_tids.front().second; 1262 // Are all threads trying to step with the same signal? 1263 continue_packet_error = false; 1264 if (num_continue_S_tids > 1) 1265 { 1266 for (size_t i=1; i<num_threads; ++i) 1267 { 1268 if (m_continue_S_tids[i].second != step_signo) 1269 continue_packet_error = true; 1270 } 1271 } 1272 if (!continue_packet_error) 1273 { 1274 // Add threads stepping with the same signo... 1275 m_gdb_comm.SetCurrentThreadForRun (-1); 1276 continue_packet.Printf("S%2.2x", step_signo); 1277 } 1278 } 1279 else if (num_continue_c_tids == 0 && 1280 num_continue_C_tids == 0 && 1281 num_continue_s_tids == 0 && 1282 num_continue_S_tids == 1 ) 1283 { 1284 // Only one thread is stepping with signal 1285 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1286 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1287 continue_packet_error = false; 1288 } 1289 } 1290 } 1291 1292 if (continue_packet_error) 1293 { 1294 error.SetErrorString ("can't make continue packet for this resume"); 1295 } 1296 else 1297 { 1298 EventSP event_sp; 1299 TimeValue timeout; 1300 timeout = TimeValue::Now(); 1301 timeout.OffsetWithSeconds (5); 1302 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1303 { 1304 error.SetErrorString ("Trying to resume but the async thread is dead."); 1305 if (log) 1306 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1307 return error; 1308 } 1309 1310 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1311 1312 if (listener.WaitForEvent (&timeout, event_sp) == false) 1313 { 1314 error.SetErrorString("Resume timed out."); 1315 if (log) 1316 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1317 } 1318 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1319 { 1320 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1321 if (log) 1322 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1323 return error; 1324 } 1325 } 1326 } 1327 1328 return error; 1329 } 1330 1331 void 1332 ProcessGDBRemote::ClearThreadIDList () 1333 { 1334 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1335 m_thread_ids.clear(); 1336 } 1337 1338 bool 1339 ProcessGDBRemote::UpdateThreadIDList () 1340 { 1341 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1342 bool sequence_mutex_unavailable = false; 1343 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1344 if (sequence_mutex_unavailable) 1345 { 1346 return false; // We just didn't get the list 1347 } 1348 return true; 1349 } 1350 1351 bool 1352 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1353 { 1354 // locker will keep a mutex locked until it goes out of scope 1355 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1356 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1357 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1358 1359 size_t num_thread_ids = m_thread_ids.size(); 1360 // The "m_thread_ids" thread ID list should always be updated after each stop 1361 // reply packet, but in case it isn't, update it here. 1362 if (num_thread_ids == 0) 1363 { 1364 if (!UpdateThreadIDList ()) 1365 return false; 1366 num_thread_ids = m_thread_ids.size(); 1367 } 1368 1369 ThreadList old_thread_list_copy(old_thread_list); 1370 if (num_thread_ids > 0) 1371 { 1372 for (size_t i=0; i<num_thread_ids; ++i) 1373 { 1374 tid_t tid = m_thread_ids[i]; 1375 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByProtocolID(tid, false)); 1376 if (!thread_sp) 1377 { 1378 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1379 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1380 log->Printf( 1381 "ProcessGDBRemote::%s Making new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1382 __FUNCTION__, 1383 thread_sp.get(), 1384 thread_sp->GetID()); 1385 } 1386 else 1387 { 1388 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1389 log->Printf( 1390 "ProcessGDBRemote::%s Found old thread: %p for thread ID: 0x%" PRIx64 ".\n", 1391 __FUNCTION__, 1392 thread_sp.get(), 1393 thread_sp->GetID()); 1394 } 1395 new_thread_list.AddThread(thread_sp); 1396 } 1397 } 1398 1399 // Whatever that is left in old_thread_list_copy are not 1400 // present in new_thread_list. Remove non-existent threads from internal id table. 1401 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1402 for (size_t i=0; i<old_num_thread_ids; i++) 1403 { 1404 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1405 if (old_thread_sp) 1406 { 1407 lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID(); 1408 m_thread_id_to_index_id_map.erase(old_thread_id); 1409 } 1410 } 1411 1412 return true; 1413 } 1414 1415 1416 StateType 1417 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1418 { 1419 stop_packet.SetFilePos (0); 1420 const char stop_type = stop_packet.GetChar(); 1421 switch (stop_type) 1422 { 1423 case 'T': 1424 case 'S': 1425 { 1426 // This is a bit of a hack, but is is required. If we did exec, we 1427 // need to clear our thread lists and also know to rebuild our dynamic 1428 // register info before we lookup and threads and populate the expedited 1429 // register values so we need to know this right away so we can cleanup 1430 // and update our registers. 1431 const uint32_t stop_id = GetStopID(); 1432 if (stop_id == 0) 1433 { 1434 // Our first stop, make sure we have a process ID, and also make 1435 // sure we know about our registers 1436 if (GetID() == LLDB_INVALID_PROCESS_ID) 1437 { 1438 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1439 if (pid != LLDB_INVALID_PROCESS_ID) 1440 SetID (pid); 1441 } 1442 BuildDynamicRegisterInfo (true); 1443 } 1444 // Stop with signal and thread info 1445 const uint8_t signo = stop_packet.GetHexU8(); 1446 std::string name; 1447 std::string value; 1448 std::string thread_name; 1449 std::string reason; 1450 std::string description; 1451 uint32_t exc_type = 0; 1452 std::vector<addr_t> exc_data; 1453 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1454 ThreadSP thread_sp; 1455 ThreadGDBRemote *gdb_thread = NULL; 1456 1457 while (stop_packet.GetNameColonValue(name, value)) 1458 { 1459 if (name.compare("metype") == 0) 1460 { 1461 // exception type in big endian hex 1462 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1463 } 1464 else if (name.compare("medata") == 0) 1465 { 1466 // exception data in big endian hex 1467 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1468 } 1469 else if (name.compare("thread") == 0) 1470 { 1471 // thread in big endian hex 1472 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1473 // m_thread_list_real does have its own mutex, but we need to 1474 // hold onto the mutex between the call to m_thread_list_real.FindThreadByID(...) 1475 // and the m_thread_list_real.AddThread(...) so it doesn't change on us 1476 Mutex::Locker locker (m_thread_list_real.GetMutex ()); 1477 thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false); 1478 1479 if (!thread_sp) 1480 { 1481 // Create the thread if we need to 1482 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1483 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1484 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1485 log->Printf ("ProcessGDBRemote::%s Adding new thread: %p for thread ID: 0x%" PRIx64 ".\n", 1486 __FUNCTION__, 1487 thread_sp.get(), 1488 thread_sp->GetID()); 1489 1490 m_thread_list_real.AddThread(thread_sp); 1491 } 1492 gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1493 1494 } 1495 else if (name.compare("threads") == 0) 1496 { 1497 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1498 m_thread_ids.clear(); 1499 // A comma separated list of all threads in the current 1500 // process that includes the thread for this stop reply 1501 // packet 1502 size_t comma_pos; 1503 lldb::tid_t tid; 1504 while ((comma_pos = value.find(',')) != std::string::npos) 1505 { 1506 value[comma_pos] = '\0'; 1507 // thread in big endian hex 1508 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1509 if (tid != LLDB_INVALID_THREAD_ID) 1510 m_thread_ids.push_back (tid); 1511 value.erase(0, comma_pos + 1); 1512 1513 } 1514 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1515 if (tid != LLDB_INVALID_THREAD_ID) 1516 m_thread_ids.push_back (tid); 1517 } 1518 else if (name.compare("hexname") == 0) 1519 { 1520 StringExtractor name_extractor; 1521 // Swap "value" over into "name_extractor" 1522 name_extractor.GetStringRef().swap(value); 1523 // Now convert the HEX bytes into a string value 1524 name_extractor.GetHexByteString (value); 1525 thread_name.swap (value); 1526 } 1527 else if (name.compare("name") == 0) 1528 { 1529 thread_name.swap (value); 1530 } 1531 else if (name.compare("qaddr") == 0) 1532 { 1533 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1534 } 1535 else if (name.compare("reason") == 0) 1536 { 1537 reason.swap(value); 1538 } 1539 else if (name.compare("description") == 0) 1540 { 1541 StringExtractor desc_extractor; 1542 // Swap "value" over into "name_extractor" 1543 desc_extractor.GetStringRef().swap(value); 1544 // Now convert the HEX bytes into a string value 1545 desc_extractor.GetHexByteString (thread_name); 1546 } 1547 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1548 { 1549 // We have a register number that contains an expedited 1550 // register value. Lets supply this register to our thread 1551 // so it won't have to go and read it. 1552 if (gdb_thread) 1553 { 1554 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1555 1556 if (reg != UINT32_MAX) 1557 { 1558 StringExtractor reg_value_extractor; 1559 // Swap "value" over into "reg_value_extractor" 1560 reg_value_extractor.GetStringRef().swap(value); 1561 if (!gdb_thread->PrivateSetRegisterValue (reg, reg_value_extractor)) 1562 { 1563 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1564 name.c_str(), 1565 reg, 1566 reg, 1567 reg_value_extractor.GetStringRef().c_str(), 1568 stop_packet.GetStringRef().c_str()); 1569 } 1570 } 1571 } 1572 } 1573 } 1574 1575 if (thread_sp) 1576 { 1577 // Clear the stop info just in case we don't set it to anything 1578 thread_sp->SetStopInfo (StopInfoSP()); 1579 1580 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1581 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1582 if (exc_type != 0) 1583 { 1584 const size_t exc_data_size = exc_data.size(); 1585 1586 thread_sp->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1587 exc_type, 1588 exc_data_size, 1589 exc_data_size >= 1 ? exc_data[0] : 0, 1590 exc_data_size >= 2 ? exc_data[1] : 0, 1591 exc_data_size >= 3 ? exc_data[2] : 0)); 1592 } 1593 else 1594 { 1595 bool handled = false; 1596 bool did_exec = false; 1597 if (!reason.empty()) 1598 { 1599 if (reason.compare("trace") == 0) 1600 { 1601 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1602 handled = true; 1603 } 1604 else if (reason.compare("breakpoint") == 0) 1605 { 1606 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1607 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1608 if (bp_site_sp) 1609 { 1610 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1611 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1612 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1613 handled = true; 1614 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1615 { 1616 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1617 } 1618 else 1619 { 1620 StopInfoSP invalid_stop_info_sp; 1621 thread_sp->SetStopInfo (invalid_stop_info_sp); 1622 } 1623 } 1624 1625 } 1626 else if (reason.compare("trap") == 0) 1627 { 1628 // Let the trap just use the standard signal stop reason below... 1629 } 1630 else if (reason.compare("watchpoint") == 0) 1631 { 1632 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1633 // TODO: locate the watchpoint somehow... 1634 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1635 handled = true; 1636 } 1637 else if (reason.compare("exception") == 0) 1638 { 1639 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1640 handled = true; 1641 } 1642 else if (reason.compare("exec") == 0) 1643 { 1644 did_exec = true; 1645 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithExec(*thread_sp)); 1646 handled = true; 1647 } 1648 } 1649 1650 if (signo && did_exec == false) 1651 { 1652 if (signo == SIGTRAP) 1653 { 1654 // Currently we are going to assume SIGTRAP means we are either 1655 // hitting a breakpoint or hardware single stepping. 1656 handled = true; 1657 addr_t pc = thread_sp->GetRegisterContext()->GetPC(); 1658 lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1659 1660 if (bp_site_sp) 1661 { 1662 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1663 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1664 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1665 if (bp_site_sp->ValidForThisThread (thread_sp.get())) 1666 { 1667 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1668 } 1669 else 1670 { 1671 StopInfoSP invalid_stop_info_sp; 1672 thread_sp->SetStopInfo (invalid_stop_info_sp); 1673 } 1674 } 1675 else 1676 { 1677 // If we were stepping then assume the stop was the result of the trace. If we were 1678 // not stepping then report the SIGTRAP. 1679 // FIXME: We are still missing the case where we single step over a trap instruction. 1680 if (thread_sp->GetTemporaryResumeState() == eStateStepping) 1681 thread_sp->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1682 else 1683 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1684 } 1685 } 1686 if (!handled) 1687 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1688 } 1689 1690 if (!description.empty()) 1691 { 1692 lldb::StopInfoSP stop_info_sp (thread_sp->GetStopInfo ()); 1693 if (stop_info_sp) 1694 { 1695 stop_info_sp->SetDescription (description.c_str()); 1696 } 1697 else 1698 { 1699 thread_sp->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1700 } 1701 } 1702 } 1703 } 1704 return eStateStopped; 1705 } 1706 break; 1707 1708 case 'W': 1709 // process exited 1710 return eStateExited; 1711 1712 default: 1713 break; 1714 } 1715 return eStateInvalid; 1716 } 1717 1718 void 1719 ProcessGDBRemote::RefreshStateAfterStop () 1720 { 1721 Mutex::Locker locker(m_thread_list_real.GetMutex()); 1722 m_thread_ids.clear(); 1723 // Set the thread stop info. It might have a "threads" key whose value is 1724 // a list of all thread IDs in the current process, so m_thread_ids might 1725 // get set. 1726 SetThreadStopInfo (m_last_stop_packet); 1727 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1728 if (m_thread_ids.empty()) 1729 { 1730 // No, we need to fetch the thread list manually 1731 UpdateThreadIDList(); 1732 } 1733 1734 // Let all threads recover from stopping and do any clean up based 1735 // on the previous thread state (if any). 1736 m_thread_list_real.RefreshStateAfterStop(); 1737 1738 } 1739 1740 Error 1741 ProcessGDBRemote::DoHalt (bool &caused_stop) 1742 { 1743 Error error; 1744 1745 bool timed_out = false; 1746 Mutex::Locker locker; 1747 1748 if (m_public_state.GetValue() == eStateAttaching) 1749 { 1750 // We are being asked to halt during an attach. We need to just close 1751 // our file handle and debugserver will go away, and we can be done... 1752 m_gdb_comm.Disconnect(); 1753 } 1754 else 1755 { 1756 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1757 { 1758 if (timed_out) 1759 error.SetErrorString("timed out sending interrupt packet"); 1760 else 1761 error.SetErrorString("unknown error sending interrupt packet"); 1762 } 1763 1764 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1765 } 1766 return error; 1767 } 1768 1769 Error 1770 ProcessGDBRemote::DoDetach(bool keep_stopped) 1771 { 1772 Error error; 1773 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1774 if (log) 1775 log->Printf ("ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped); 1776 1777 DisableAllBreakpointSites (); 1778 1779 m_thread_list.DiscardThreadPlans(); 1780 1781 error = m_gdb_comm.Detach (keep_stopped); 1782 if (log) 1783 { 1784 if (error.Success()) 1785 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1786 else 1787 log->Printf ("ProcessGDBRemote::DoDetach() detach packet send failed: %s", error.AsCString() ? error.AsCString() : "<unknown error>"); 1788 } 1789 1790 if (!error.Success()) 1791 return error; 1792 1793 // Sleep for one second to let the process get all detached... 1794 StopAsyncThread (); 1795 1796 SetPrivateState (eStateDetached); 1797 ResumePrivateStateThread(); 1798 1799 //KillDebugserverProcess (); 1800 return error; 1801 } 1802 1803 1804 Error 1805 ProcessGDBRemote::DoDestroy () 1806 { 1807 Error error; 1808 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1809 if (log) 1810 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1811 1812 // There is a bug in older iOS debugservers where they don't shut down the process 1813 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1814 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1815 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1816 // destroy it again. 1817 // 1818 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1819 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1820 // the debugservers with this bug are equal. There really should be a better way to test this! 1821 // 1822 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1823 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1824 // just do the straight-forward kill. 1825 // 1826 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1827 // necessary (or helpful) to do any of this. 1828 1829 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1830 { 1831 PlatformSP platform_sp = GetTarget().GetPlatform(); 1832 1833 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1834 if (platform_sp 1835 && platform_sp->GetName() 1836 && platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) 1837 { 1838 if (m_destroy_tried_resuming) 1839 { 1840 if (log) 1841 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1842 } 1843 else 1844 { 1845 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1846 // but we really need it to happen here and it doesn't matter if we do it twice. 1847 m_thread_list.DiscardThreadPlans(); 1848 DisableAllBreakpointSites(); 1849 1850 bool stop_looks_like_crash = false; 1851 ThreadList &threads = GetThreadList(); 1852 1853 { 1854 Mutex::Locker locker(threads.GetMutex()); 1855 1856 size_t num_threads = threads.GetSize(); 1857 for (size_t i = 0; i < num_threads; i++) 1858 { 1859 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1860 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1861 StopReason reason = eStopReasonInvalid; 1862 if (stop_info_sp) 1863 reason = stop_info_sp->GetStopReason(); 1864 if (reason == eStopReasonBreakpoint 1865 || reason == eStopReasonException) 1866 { 1867 if (log) 1868 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64 " stopped with reason: %s.", 1869 thread_sp->GetProtocolID(), 1870 stop_info_sp->GetDescription()); 1871 stop_looks_like_crash = true; 1872 break; 1873 } 1874 } 1875 } 1876 1877 if (stop_looks_like_crash) 1878 { 1879 if (log) 1880 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1881 m_destroy_tried_resuming = true; 1882 1883 // If we are going to run again before killing, it would be good to suspend all the threads 1884 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1885 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1886 // have to run the risk of letting those threads proceed a bit. 1887 1888 { 1889 Mutex::Locker locker(threads.GetMutex()); 1890 1891 size_t num_threads = threads.GetSize(); 1892 for (size_t i = 0; i < num_threads; i++) 1893 { 1894 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1895 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo(); 1896 StopReason reason = eStopReasonInvalid; 1897 if (stop_info_sp) 1898 reason = stop_info_sp->GetStopReason(); 1899 if (reason != eStopReasonBreakpoint 1900 && reason != eStopReasonException) 1901 { 1902 if (log) 1903 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: 0x%4.4" PRIx64 " before running.", 1904 thread_sp->GetProtocolID()); 1905 thread_sp->SetResumeState(eStateSuspended); 1906 } 1907 } 1908 } 1909 Resume (); 1910 return Destroy(); 1911 } 1912 } 1913 } 1914 } 1915 1916 // Interrupt if our inferior is running... 1917 int exit_status = SIGABRT; 1918 std::string exit_string; 1919 1920 if (m_gdb_comm.IsConnected()) 1921 { 1922 if (m_public_state.GetValue() != eStateAttaching) 1923 { 1924 1925 StringExtractorGDBRemote response; 1926 bool send_async = true; 1927 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 1928 1929 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1930 { 1931 char packet_cmd = response.GetChar(0); 1932 1933 if (packet_cmd == 'W' || packet_cmd == 'X') 1934 { 1935 SetLastStopPacket (response); 1936 ClearThreadIDList (); 1937 exit_status = response.GetHexU8(); 1938 } 1939 else 1940 { 1941 if (log) 1942 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 1943 exit_string.assign("got unexpected response to k packet: "); 1944 exit_string.append(response.GetStringRef()); 1945 } 1946 } 1947 else 1948 { 1949 if (log) 1950 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1951 exit_string.assign("failed to send the k packet"); 1952 } 1953 1954 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 1955 } 1956 else 1957 { 1958 if (log) 1959 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1960 exit_string.assign ("killed or interrupted while attaching."); 1961 } 1962 } 1963 else 1964 { 1965 // If we missed setting the exit status on the way out, do it here. 1966 // NB set exit status can be called multiple times, the first one sets the status. 1967 exit_string.assign("destroying when not connected to debugserver"); 1968 } 1969 1970 SetExitStatus(exit_status, exit_string.c_str()); 1971 1972 StopAsyncThread (); 1973 KillDebugserverProcess (); 1974 return error; 1975 } 1976 1977 void 1978 ProcessGDBRemote::SetLastStopPacket (const StringExtractorGDBRemote &response) 1979 { 1980 lldb_private::Mutex::Locker locker (m_last_stop_packet_mutex); 1981 const bool did_exec = response.GetStringRef().find(";reason:exec;") != std::string::npos; 1982 if (did_exec) 1983 { 1984 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1985 if (log) 1986 log->Printf ("ProcessGDBRemote::SetLastStopPacket () - detected exec"); 1987 1988 m_thread_list_real.Clear(); 1989 m_thread_list.Clear(); 1990 BuildDynamicRegisterInfo (true); 1991 m_gdb_comm.ResetDiscoverableSettings(); 1992 } 1993 m_last_stop_packet = response; 1994 } 1995 1996 1997 //------------------------------------------------------------------ 1998 // Process Queries 1999 //------------------------------------------------------------------ 2000 2001 bool 2002 ProcessGDBRemote::IsAlive () 2003 { 2004 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2005 } 2006 2007 addr_t 2008 ProcessGDBRemote::GetImageInfoAddress() 2009 { 2010 return m_gdb_comm.GetShlibInfoAddr(); 2011 } 2012 2013 //------------------------------------------------------------------ 2014 // Process Memory 2015 //------------------------------------------------------------------ 2016 size_t 2017 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2018 { 2019 if (size > m_max_memory_size) 2020 { 2021 // Keep memory read sizes down to a sane limit. This function will be 2022 // called multiple times in order to complete the task by 2023 // lldb_private::Process so it is ok to do this. 2024 size = m_max_memory_size; 2025 } 2026 2027 char packet[64]; 2028 const int packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2029 assert (packet_len + 1 < (int)sizeof(packet)); 2030 StringExtractorGDBRemote response; 2031 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 2032 { 2033 if (response.IsNormalResponse()) 2034 { 2035 error.Clear(); 2036 return response.GetHexBytes(buf, size, '\xdd'); 2037 } 2038 else if (response.IsErrorResponse()) 2039 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2040 else if (response.IsUnsupportedResponse()) 2041 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2042 else 2043 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2044 } 2045 else 2046 { 2047 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet); 2048 } 2049 return 0; 2050 } 2051 2052 size_t 2053 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2054 { 2055 if (size > m_max_memory_size) 2056 { 2057 // Keep memory read sizes down to a sane limit. This function will be 2058 // called multiple times in order to complete the task by 2059 // lldb_private::Process so it is ok to do this. 2060 size = m_max_memory_size; 2061 } 2062 2063 StreamString packet; 2064 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2065 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2066 StringExtractorGDBRemote response; 2067 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 2068 { 2069 if (response.IsOKResponse()) 2070 { 2071 error.Clear(); 2072 return size; 2073 } 2074 else if (response.IsErrorResponse()) 2075 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2076 else if (response.IsUnsupportedResponse()) 2077 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2078 else 2079 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2080 } 2081 else 2082 { 2083 error.SetErrorStringWithFormat("failed to send packet: '%s'", packet.GetString().c_str()); 2084 } 2085 return 0; 2086 } 2087 2088 lldb::addr_t 2089 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2090 { 2091 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2092 2093 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2094 switch (supported) 2095 { 2096 case eLazyBoolCalculate: 2097 case eLazyBoolYes: 2098 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2099 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2100 return allocated_addr; 2101 2102 case eLazyBoolNo: 2103 // Call mmap() to create memory in the inferior.. 2104 unsigned prot = 0; 2105 if (permissions & lldb::ePermissionsReadable) 2106 prot |= eMmapProtRead; 2107 if (permissions & lldb::ePermissionsWritable) 2108 prot |= eMmapProtWrite; 2109 if (permissions & lldb::ePermissionsExecutable) 2110 prot |= eMmapProtExec; 2111 2112 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2113 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2114 m_addr_to_mmap_size[allocated_addr] = size; 2115 else 2116 allocated_addr = LLDB_INVALID_ADDRESS; 2117 break; 2118 } 2119 2120 if (allocated_addr == LLDB_INVALID_ADDRESS) 2121 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2122 else 2123 error.Clear(); 2124 return allocated_addr; 2125 } 2126 2127 Error 2128 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2129 MemoryRegionInfo ®ion_info) 2130 { 2131 2132 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2133 return error; 2134 } 2135 2136 Error 2137 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2138 { 2139 2140 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2141 return error; 2142 } 2143 2144 Error 2145 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2146 { 2147 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2148 return error; 2149 } 2150 2151 Error 2152 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2153 { 2154 Error error; 2155 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2156 2157 switch (supported) 2158 { 2159 case eLazyBoolCalculate: 2160 // We should never be deallocating memory without allocating memory 2161 // first so we should never get eLazyBoolCalculate 2162 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2163 break; 2164 2165 case eLazyBoolYes: 2166 if (!m_gdb_comm.DeallocateMemory (addr)) 2167 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2168 break; 2169 2170 case eLazyBoolNo: 2171 // Call munmap() to deallocate memory in the inferior.. 2172 { 2173 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2174 if (pos != m_addr_to_mmap_size.end() && 2175 InferiorCallMunmap(this, addr, pos->second)) 2176 m_addr_to_mmap_size.erase (pos); 2177 else 2178 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2179 } 2180 break; 2181 } 2182 2183 return error; 2184 } 2185 2186 2187 //------------------------------------------------------------------ 2188 // Process STDIO 2189 //------------------------------------------------------------------ 2190 size_t 2191 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2192 { 2193 if (m_stdio_communication.IsConnected()) 2194 { 2195 ConnectionStatus status; 2196 m_stdio_communication.Write(src, src_len, status, NULL); 2197 } 2198 return 0; 2199 } 2200 2201 Error 2202 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2203 { 2204 Error error; 2205 assert (bp_site != NULL); 2206 2207 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2208 user_id_t site_id = bp_site->GetID(); 2209 const addr_t addr = bp_site->GetLoadAddress(); 2210 if (log) 2211 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2212 2213 if (bp_site->IsEnabled()) 2214 { 2215 if (log) 2216 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2217 return error; 2218 } 2219 else 2220 { 2221 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2222 2223 if (bp_site->HardwarePreferred()) 2224 { 2225 // Try and set hardware breakpoint, and if that fails, fall through 2226 // and set a software breakpoint? 2227 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2228 { 2229 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2230 { 2231 bp_site->SetEnabled(true); 2232 bp_site->SetType (BreakpointSite::eHardware); 2233 return error; 2234 } 2235 } 2236 } 2237 2238 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2239 { 2240 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2241 { 2242 bp_site->SetEnabled(true); 2243 bp_site->SetType (BreakpointSite::eExternal); 2244 return error; 2245 } 2246 } 2247 2248 return EnableSoftwareBreakpoint (bp_site); 2249 } 2250 2251 if (log) 2252 { 2253 const char *err_string = error.AsCString(); 2254 log->Printf ("ProcessGDBRemote::EnableBreakpointSite () error for breakpoint at 0x%8.8" PRIx64 ": %s", 2255 bp_site->GetLoadAddress(), 2256 err_string ? err_string : "NULL"); 2257 } 2258 // We shouldn't reach here on a successful breakpoint enable... 2259 if (error.Success()) 2260 error.SetErrorToGenericError(); 2261 return error; 2262 } 2263 2264 Error 2265 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2266 { 2267 Error error; 2268 assert (bp_site != NULL); 2269 addr_t addr = bp_site->GetLoadAddress(); 2270 user_id_t site_id = bp_site->GetID(); 2271 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2272 if (log) 2273 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2274 2275 if (bp_site->IsEnabled()) 2276 { 2277 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2278 2279 BreakpointSite::Type bp_type = bp_site->GetType(); 2280 switch (bp_type) 2281 { 2282 case BreakpointSite::eSoftware: 2283 error = DisableSoftwareBreakpoint (bp_site); 2284 break; 2285 2286 case BreakpointSite::eHardware: 2287 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2288 error.SetErrorToGenericError(); 2289 break; 2290 2291 case BreakpointSite::eExternal: 2292 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2293 error.SetErrorToGenericError(); 2294 break; 2295 } 2296 if (error.Success()) 2297 bp_site->SetEnabled(false); 2298 } 2299 else 2300 { 2301 if (log) 2302 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2303 return error; 2304 } 2305 2306 if (error.Success()) 2307 error.SetErrorToGenericError(); 2308 return error; 2309 } 2310 2311 // Pre-requisite: wp != NULL. 2312 static GDBStoppointType 2313 GetGDBStoppointType (Watchpoint *wp) 2314 { 2315 assert(wp); 2316 bool watch_read = wp->WatchpointRead(); 2317 bool watch_write = wp->WatchpointWrite(); 2318 2319 // watch_read and watch_write cannot both be false. 2320 assert(watch_read || watch_write); 2321 if (watch_read && watch_write) 2322 return eWatchpointReadWrite; 2323 else if (watch_read) 2324 return eWatchpointRead; 2325 else // Must be watch_write, then. 2326 return eWatchpointWrite; 2327 } 2328 2329 Error 2330 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2331 { 2332 Error error; 2333 if (wp) 2334 { 2335 user_id_t watchID = wp->GetID(); 2336 addr_t addr = wp->GetLoadAddress(); 2337 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2338 if (log) 2339 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2340 if (wp->IsEnabled()) 2341 { 2342 if (log) 2343 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2344 return error; 2345 } 2346 2347 GDBStoppointType type = GetGDBStoppointType(wp); 2348 // Pass down an appropriate z/Z packet... 2349 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2350 { 2351 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2352 { 2353 wp->SetEnabled(true, notify); 2354 return error; 2355 } 2356 else 2357 error.SetErrorString("sending gdb watchpoint packet failed"); 2358 } 2359 else 2360 error.SetErrorString("watchpoints not supported"); 2361 } 2362 else 2363 { 2364 error.SetErrorString("Watchpoint argument was NULL."); 2365 } 2366 if (error.Success()) 2367 error.SetErrorToGenericError(); 2368 return error; 2369 } 2370 2371 Error 2372 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2373 { 2374 Error error; 2375 if (wp) 2376 { 2377 user_id_t watchID = wp->GetID(); 2378 2379 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2380 2381 addr_t addr = wp->GetLoadAddress(); 2382 2383 if (log) 2384 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2385 2386 if (!wp->IsEnabled()) 2387 { 2388 if (log) 2389 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2390 // See also 'class WatchpointSentry' within StopInfo.cpp. 2391 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2392 // the watchpoint object to intelligently process this action. 2393 wp->SetEnabled(false, notify); 2394 return error; 2395 } 2396 2397 if (wp->IsHardware()) 2398 { 2399 GDBStoppointType type = GetGDBStoppointType(wp); 2400 // Pass down an appropriate z/Z packet... 2401 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2402 { 2403 wp->SetEnabled(false, notify); 2404 return error; 2405 } 2406 else 2407 error.SetErrorString("sending gdb watchpoint packet failed"); 2408 } 2409 // TODO: clear software watchpoints if we implement them 2410 } 2411 else 2412 { 2413 error.SetErrorString("Watchpoint argument was NULL."); 2414 } 2415 if (error.Success()) 2416 error.SetErrorToGenericError(); 2417 return error; 2418 } 2419 2420 void 2421 ProcessGDBRemote::Clear() 2422 { 2423 m_flags = 0; 2424 m_thread_list_real.Clear(); 2425 m_thread_list.Clear(); 2426 } 2427 2428 Error 2429 ProcessGDBRemote::DoSignal (int signo) 2430 { 2431 Error error; 2432 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2433 if (log) 2434 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2435 2436 if (!m_gdb_comm.SendAsyncSignal (signo)) 2437 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2438 return error; 2439 } 2440 2441 Error 2442 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2443 { 2444 ProcessLaunchInfo launch_info; 2445 return StartDebugserverProcess(debugserver_url, launch_info); 2446 } 2447 2448 Error 2449 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2450 { 2451 Error error; 2452 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2453 { 2454 // If we locate debugserver, keep that located version around 2455 static FileSpec g_debugserver_file_spec; 2456 2457 ProcessLaunchInfo debugserver_launch_info; 2458 char debugserver_path[PATH_MAX]; 2459 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2460 2461 // Always check to see if we have an environment override for the path 2462 // to the debugserver to use and use it if we do. 2463 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2464 if (env_debugserver_path) 2465 debugserver_file_spec.SetFile (env_debugserver_path, false); 2466 else 2467 debugserver_file_spec = g_debugserver_file_spec; 2468 bool debugserver_exists = debugserver_file_spec.Exists(); 2469 if (!debugserver_exists) 2470 { 2471 // The debugserver binary is in the LLDB.framework/Resources 2472 // directory. 2473 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2474 { 2475 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2476 debugserver_exists = debugserver_file_spec.Exists(); 2477 if (debugserver_exists) 2478 { 2479 g_debugserver_file_spec = debugserver_file_spec; 2480 } 2481 else 2482 { 2483 g_debugserver_file_spec.Clear(); 2484 debugserver_file_spec.Clear(); 2485 } 2486 } 2487 } 2488 2489 if (debugserver_exists) 2490 { 2491 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2492 2493 m_stdio_communication.Clear(); 2494 2495 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2496 2497 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2498 char arg_cstr[PATH_MAX]; 2499 2500 // Start args with "debugserver /file/path -r --" 2501 debugserver_args.AppendArgument(debugserver_path); 2502 debugserver_args.AppendArgument(debugserver_url); 2503 // use native registers, not the GDB registers 2504 debugserver_args.AppendArgument("--native-regs"); 2505 // make debugserver run in its own session so signals generated by 2506 // special terminal key sequences (^C) don't affect debugserver 2507 debugserver_args.AppendArgument("--setsid"); 2508 2509 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2510 if (env_debugserver_log_file) 2511 { 2512 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2513 debugserver_args.AppendArgument(arg_cstr); 2514 } 2515 2516 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2517 if (env_debugserver_log_flags) 2518 { 2519 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2520 debugserver_args.AppendArgument(arg_cstr); 2521 } 2522 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2523 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2524 2525 // We currently send down all arguments, attach pids, or attach 2526 // process names in dedicated GDB server packets, so we don't need 2527 // to pass them as arguments. This is currently because of all the 2528 // things we need to setup prior to launching: the environment, 2529 // current working dir, file actions, etc. 2530 #if 0 2531 // Now append the program arguments 2532 if (inferior_argv) 2533 { 2534 // Terminate the debugserver args so we can now append the inferior args 2535 debugserver_args.AppendArgument("--"); 2536 2537 for (int i = 0; inferior_argv[i] != NULL; ++i) 2538 debugserver_args.AppendArgument (inferior_argv[i]); 2539 } 2540 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2541 { 2542 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2543 debugserver_args.AppendArgument (arg_cstr); 2544 } 2545 else if (attach_name && attach_name[0]) 2546 { 2547 if (wait_for_launch) 2548 debugserver_args.AppendArgument ("--waitfor"); 2549 else 2550 debugserver_args.AppendArgument ("--attach"); 2551 debugserver_args.AppendArgument (attach_name); 2552 } 2553 #endif 2554 2555 ProcessLaunchInfo::FileAction file_action; 2556 2557 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2558 // to "/dev/null" if we run into any problems. 2559 file_action.Close (STDIN_FILENO); 2560 debugserver_launch_info.AppendFileAction (file_action); 2561 file_action.Close (STDOUT_FILENO); 2562 debugserver_launch_info.AppendFileAction (file_action); 2563 file_action.Close (STDERR_FILENO); 2564 debugserver_launch_info.AppendFileAction (file_action); 2565 2566 if (log) 2567 { 2568 StreamString strm; 2569 debugserver_args.Dump (&strm); 2570 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2571 } 2572 2573 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2574 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2575 2576 error = Host::LaunchProcess(debugserver_launch_info); 2577 2578 if (error.Success ()) 2579 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2580 else 2581 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2582 2583 if (error.Fail() || log) 2584 error.PutToLog(log, "Host::LaunchProcess (launch_info) => pid=%" PRIu64 ", path='%s'", m_debugserver_pid, debugserver_path); 2585 } 2586 else 2587 { 2588 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2589 } 2590 2591 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2592 StartAsyncThread (); 2593 } 2594 return error; 2595 } 2596 2597 bool 2598 ProcessGDBRemote::MonitorDebugserverProcess 2599 ( 2600 void *callback_baton, 2601 lldb::pid_t debugserver_pid, 2602 bool exited, // True if the process did exit 2603 int signo, // Zero for no signal 2604 int exit_status // Exit value of process if signal is zero 2605 ) 2606 { 2607 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2608 // and might not exist anymore, so we need to carefully try to get the 2609 // target for this process first since we have a race condition when 2610 // we are done running between getting the notice that the inferior 2611 // process has died and the debugserver that was debugging this process. 2612 // In our test suite, we are also continually running process after 2613 // process, so we must be very careful to make sure: 2614 // 1 - process object hasn't been deleted already 2615 // 2 - that a new process object hasn't been recreated in its place 2616 2617 // "debugserver_pid" argument passed in is the process ID for 2618 // debugserver that we are tracking... 2619 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2620 2621 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2622 2623 // Get a shared pointer to the target that has a matching process pointer. 2624 // This target could be gone, or the target could already have a new process 2625 // object inside of it 2626 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2627 2628 if (log) 2629 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2630 2631 if (target_sp) 2632 { 2633 // We found a process in a target that matches, but another thread 2634 // might be in the process of launching a new process that will 2635 // soon replace it, so get a shared pointer to the process so we 2636 // can keep it alive. 2637 ProcessSP process_sp (target_sp->GetProcessSP()); 2638 // Now we have a shared pointer to the process that can't go away on us 2639 // so we now make sure it was the same as the one passed in, and also make 2640 // sure that our previous "process *" didn't get deleted and have a new 2641 // "process *" created in its place with the same pointer. To verify this 2642 // we make sure the process has our debugserver process ID. If we pass all 2643 // of these tests, then we are sure that this process is the one we were 2644 // looking for. 2645 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2646 { 2647 // Sleep for a half a second to make sure our inferior process has 2648 // time to set its exit status before we set it incorrectly when 2649 // both the debugserver and the inferior process shut down. 2650 usleep (500000); 2651 // If our process hasn't yet exited, debugserver might have died. 2652 // If the process did exit, the we are reaping it. 2653 const StateType state = process->GetState(); 2654 2655 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2656 state != eStateInvalid && 2657 state != eStateUnloaded && 2658 state != eStateExited && 2659 state != eStateDetached) 2660 { 2661 char error_str[1024]; 2662 if (signo) 2663 { 2664 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2665 if (signal_cstr) 2666 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2667 else 2668 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2669 } 2670 else 2671 { 2672 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2673 } 2674 2675 process->SetExitStatus (-1, error_str); 2676 } 2677 // Debugserver has exited we need to let our ProcessGDBRemote 2678 // know that it no longer has a debugserver instance 2679 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2680 } 2681 } 2682 return true; 2683 } 2684 2685 void 2686 ProcessGDBRemote::KillDebugserverProcess () 2687 { 2688 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2689 { 2690 ::kill (m_debugserver_pid, SIGINT); 2691 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2692 } 2693 } 2694 2695 void 2696 ProcessGDBRemote::Initialize() 2697 { 2698 static bool g_initialized = false; 2699 2700 if (g_initialized == false) 2701 { 2702 g_initialized = true; 2703 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2704 GetPluginDescriptionStatic(), 2705 CreateInstance, 2706 DebuggerInitialize); 2707 2708 Log::Callbacks log_callbacks = { 2709 ProcessGDBRemoteLog::DisableLog, 2710 ProcessGDBRemoteLog::EnableLog, 2711 ProcessGDBRemoteLog::ListLogCategories 2712 }; 2713 2714 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2715 } 2716 } 2717 2718 void 2719 ProcessGDBRemote::DebuggerInitialize (lldb_private::Debugger &debugger) 2720 { 2721 if (!PluginManager::GetSettingForProcessPlugin(debugger, PluginProperties::GetSettingName())) 2722 { 2723 const bool is_global_setting = true; 2724 PluginManager::CreateSettingForProcessPlugin (debugger, 2725 GetGlobalPluginProperties()->GetValueProperties(), 2726 ConstString ("Properties for the gdb-remote process plug-in."), 2727 is_global_setting); 2728 } 2729 } 2730 2731 bool 2732 ProcessGDBRemote::StartAsyncThread () 2733 { 2734 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2735 2736 if (log) 2737 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2738 2739 Mutex::Locker start_locker(m_async_thread_state_mutex); 2740 if (m_async_thread_state == eAsyncThreadNotStarted) 2741 { 2742 // Create a thread that watches our internal state and controls which 2743 // events make it to clients (into the DCProcess event queue). 2744 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2745 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2746 { 2747 m_async_thread_state = eAsyncThreadRunning; 2748 return true; 2749 } 2750 else 2751 return false; 2752 } 2753 else 2754 { 2755 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2756 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2757 if (log) 2758 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2759 if (m_async_thread_state == eAsyncThreadRunning) 2760 return true; 2761 else 2762 return false; 2763 } 2764 } 2765 2766 void 2767 ProcessGDBRemote::StopAsyncThread () 2768 { 2769 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2770 2771 if (log) 2772 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2773 2774 Mutex::Locker start_locker(m_async_thread_state_mutex); 2775 if (m_async_thread_state == eAsyncThreadRunning) 2776 { 2777 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2778 2779 // This will shut down the async thread. 2780 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2781 2782 // Stop the stdio thread 2783 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2784 { 2785 Host::ThreadJoin (m_async_thread, NULL, NULL); 2786 } 2787 m_async_thread_state = eAsyncThreadDone; 2788 } 2789 else 2790 { 2791 if (log) 2792 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2793 } 2794 } 2795 2796 2797 void * 2798 ProcessGDBRemote::AsyncThread (void *arg) 2799 { 2800 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2801 2802 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2803 if (log) 2804 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2805 2806 Listener listener ("ProcessGDBRemote::AsyncThread"); 2807 EventSP event_sp; 2808 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2809 eBroadcastBitAsyncThreadShouldExit; 2810 2811 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2812 { 2813 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2814 2815 bool done = false; 2816 while (!done) 2817 { 2818 if (log) 2819 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2820 if (listener.WaitForEvent (NULL, event_sp)) 2821 { 2822 const uint32_t event_type = event_sp->GetType(); 2823 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2824 { 2825 if (log) 2826 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2827 2828 switch (event_type) 2829 { 2830 case eBroadcastBitAsyncContinue: 2831 { 2832 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2833 2834 if (continue_packet) 2835 { 2836 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2837 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2838 if (log) 2839 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2840 2841 if (::strstr (continue_cstr, "vAttach") == NULL) 2842 process->SetPrivateState(eStateRunning); 2843 StringExtractorGDBRemote response; 2844 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2845 2846 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2847 // The thread ID list might be contained within the "response", or the stop reply packet that 2848 // caused the stop. So clear it now before we give the stop reply packet to the process 2849 // using the process->SetLastStopPacket()... 2850 process->ClearThreadIDList (); 2851 2852 switch (stop_state) 2853 { 2854 case eStateStopped: 2855 case eStateCrashed: 2856 case eStateSuspended: 2857 process->SetLastStopPacket (response); 2858 process->SetPrivateState (stop_state); 2859 break; 2860 2861 case eStateExited: 2862 process->SetLastStopPacket (response); 2863 process->ClearThreadIDList(); 2864 response.SetFilePos(1); 2865 process->SetExitStatus(response.GetHexU8(), NULL); 2866 done = true; 2867 break; 2868 2869 case eStateInvalid: 2870 process->SetExitStatus(-1, "lost connection"); 2871 break; 2872 2873 default: 2874 process->SetPrivateState (stop_state); 2875 break; 2876 } 2877 } 2878 } 2879 break; 2880 2881 case eBroadcastBitAsyncThreadShouldExit: 2882 if (log) 2883 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2884 done = true; 2885 break; 2886 2887 default: 2888 if (log) 2889 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2890 done = true; 2891 break; 2892 } 2893 } 2894 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2895 { 2896 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2897 { 2898 process->SetExitStatus (-1, "lost connection"); 2899 done = true; 2900 } 2901 } 2902 } 2903 else 2904 { 2905 if (log) 2906 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2907 done = true; 2908 } 2909 } 2910 } 2911 2912 if (log) 2913 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 2914 2915 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2916 return NULL; 2917 } 2918 2919 const char * 2920 ProcessGDBRemote::GetDispatchQueueNameForThread 2921 ( 2922 addr_t thread_dispatch_qaddr, 2923 std::string &dispatch_queue_name 2924 ) 2925 { 2926 dispatch_queue_name.clear(); 2927 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2928 { 2929 // Cache the dispatch_queue_offsets_addr value so we don't always have 2930 // to look it up 2931 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2932 { 2933 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2934 const Symbol *dispatch_queue_offsets_symbol = NULL; 2935 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2936 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2937 if (module_sp) 2938 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2939 2940 if (dispatch_queue_offsets_symbol == NULL) 2941 { 2942 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2943 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2944 if (module_sp) 2945 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2946 } 2947 if (dispatch_queue_offsets_symbol) 2948 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2949 2950 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2951 return NULL; 2952 } 2953 2954 uint8_t memory_buffer[8]; 2955 DataExtractor data (memory_buffer, 2956 sizeof(memory_buffer), 2957 m_target.GetArchitecture().GetByteOrder(), 2958 m_target.GetArchitecture().GetAddressByteSize()); 2959 2960 // Excerpt from src/queue_private.h 2961 struct dispatch_queue_offsets_s 2962 { 2963 uint16_t dqo_version; 2964 uint16_t dqo_label; // in version 1-3, offset to string; in version 4+, offset to a pointer to a string 2965 uint16_t dqo_label_size; // in version 1-3, length of string; in version 4+, size of a (void*) in this process 2966 } dispatch_queue_offsets; 2967 2968 2969 Error error; 2970 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2971 { 2972 lldb::offset_t data_offset = 0; 2973 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2974 { 2975 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2976 { 2977 data_offset = 0; 2978 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2979 if (dispatch_queue_offsets.dqo_version >= 4) 2980 { 2981 // libdispatch versions 4+, pointer to dispatch name is in the 2982 // queue structure. 2983 lldb::addr_t pointer_to_label_address = queue_addr + dispatch_queue_offsets.dqo_label; 2984 if (ReadMemory (pointer_to_label_address, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2985 { 2986 data_offset = 0; 2987 lldb::addr_t label_addr = data.GetAddress(&data_offset); 2988 ReadCStringFromMemory (label_addr, dispatch_queue_name, error); 2989 } 2990 } 2991 else 2992 { 2993 // libdispatch versions 1-3, dispatch name is a fixed width char array 2994 // in the queue structure. 2995 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2996 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2997 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2998 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2999 dispatch_queue_name.erase (bytes_read); 3000 } 3001 } 3002 } 3003 } 3004 } 3005 if (dispatch_queue_name.empty()) 3006 return NULL; 3007 return dispatch_queue_name.c_str(); 3008 } 3009 3010 //uint32_t 3011 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 3012 //{ 3013 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 3014 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 3015 // if (m_local_debugserver) 3016 // { 3017 // return Host::ListProcessesMatchingName (name, matches, pids); 3018 // } 3019 // else 3020 // { 3021 // // FIXME: Implement talking to the remote debugserver. 3022 // return 0; 3023 // } 3024 // 3025 //} 3026 // 3027 bool 3028 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 3029 lldb_private::StoppointCallbackContext *context, 3030 lldb::user_id_t break_id, 3031 lldb::user_id_t break_loc_id) 3032 { 3033 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 3034 // run so I can stop it if that's what I want to do. 3035 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3036 if (log) 3037 log->Printf("Hit New Thread Notification breakpoint."); 3038 return false; 3039 } 3040 3041 3042 bool 3043 ProcessGDBRemote::StartNoticingNewThreads() 3044 { 3045 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3046 if (m_thread_create_bp_sp) 3047 { 3048 if (log && log->GetVerbose()) 3049 log->Printf("Enabled noticing new thread breakpoint."); 3050 m_thread_create_bp_sp->SetEnabled(true); 3051 } 3052 else 3053 { 3054 PlatformSP platform_sp (m_target.GetPlatform()); 3055 if (platform_sp) 3056 { 3057 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3058 if (m_thread_create_bp_sp) 3059 { 3060 if (log && log->GetVerbose()) 3061 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3062 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3063 } 3064 else 3065 { 3066 if (log) 3067 log->Printf("Failed to create new thread notification breakpoint."); 3068 } 3069 } 3070 } 3071 return m_thread_create_bp_sp.get() != NULL; 3072 } 3073 3074 bool 3075 ProcessGDBRemote::StopNoticingNewThreads() 3076 { 3077 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3078 if (log && log->GetVerbose()) 3079 log->Printf ("Disabling new thread notification breakpoint."); 3080 3081 if (m_thread_create_bp_sp) 3082 m_thread_create_bp_sp->SetEnabled(false); 3083 3084 return true; 3085 } 3086 3087 lldb_private::DynamicLoader * 3088 ProcessGDBRemote::GetDynamicLoader () 3089 { 3090 if (m_dyld_ap.get() == NULL) 3091 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, NULL)); 3092 return m_dyld_ap.get(); 3093 } 3094 3095 3096 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 3097 { 3098 private: 3099 3100 public: 3101 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3102 CommandObjectParsed (interpreter, 3103 "process plugin packet history", 3104 "Dumps the packet history buffer. ", 3105 NULL) 3106 { 3107 } 3108 3109 ~CommandObjectProcessGDBRemotePacketHistory () 3110 { 3111 } 3112 3113 bool 3114 DoExecute (Args& command, CommandReturnObject &result) 3115 { 3116 const size_t argc = command.GetArgumentCount(); 3117 if (argc == 0) 3118 { 3119 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3120 if (process) 3121 { 3122 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3123 result.SetStatus (eReturnStatusSuccessFinishResult); 3124 return true; 3125 } 3126 } 3127 else 3128 { 3129 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3130 } 3131 result.SetStatus (eReturnStatusFailed); 3132 return false; 3133 } 3134 }; 3135 3136 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3137 { 3138 private: 3139 3140 public: 3141 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3142 CommandObjectParsed (interpreter, 3143 "process plugin packet send", 3144 "Send a custom packet through the GDB remote protocol and print the answer. " 3145 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3146 NULL) 3147 { 3148 } 3149 3150 ~CommandObjectProcessGDBRemotePacketSend () 3151 { 3152 } 3153 3154 bool 3155 DoExecute (Args& command, CommandReturnObject &result) 3156 { 3157 const size_t argc = command.GetArgumentCount(); 3158 if (argc == 0) 3159 { 3160 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3161 result.SetStatus (eReturnStatusFailed); 3162 return false; 3163 } 3164 3165 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3166 if (process) 3167 { 3168 for (size_t i=0; i<argc; ++ i) 3169 { 3170 const char *packet_cstr = command.GetArgumentAtIndex(0); 3171 bool send_async = true; 3172 StringExtractorGDBRemote response; 3173 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3174 result.SetStatus (eReturnStatusSuccessFinishResult); 3175 Stream &output_strm = result.GetOutputStream(); 3176 output_strm.Printf (" packet: %s\n", packet_cstr); 3177 std::string &response_str = response.GetStringRef(); 3178 3179 if (strstr(packet_cstr, "qGetProfileData") != NULL) 3180 { 3181 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3182 } 3183 3184 if (response_str.empty()) 3185 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3186 else 3187 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3188 } 3189 } 3190 return true; 3191 } 3192 }; 3193 3194 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3195 { 3196 private: 3197 3198 public: 3199 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3200 CommandObjectRaw (interpreter, 3201 "process plugin packet monitor", 3202 "Send a qRcmd packet through the GDB remote protocol and print the response." 3203 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3204 NULL) 3205 { 3206 } 3207 3208 ~CommandObjectProcessGDBRemotePacketMonitor () 3209 { 3210 } 3211 3212 bool 3213 DoExecute (const char *command, CommandReturnObject &result) 3214 { 3215 if (command == NULL || command[0] == '\0') 3216 { 3217 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3218 result.SetStatus (eReturnStatusFailed); 3219 return false; 3220 } 3221 3222 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3223 if (process) 3224 { 3225 StreamString packet; 3226 packet.PutCString("qRcmd,"); 3227 packet.PutBytesAsRawHex8(command, strlen(command)); 3228 const char *packet_cstr = packet.GetString().c_str(); 3229 3230 bool send_async = true; 3231 StringExtractorGDBRemote response; 3232 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3233 result.SetStatus (eReturnStatusSuccessFinishResult); 3234 Stream &output_strm = result.GetOutputStream(); 3235 output_strm.Printf (" packet: %s\n", packet_cstr); 3236 const std::string &response_str = response.GetStringRef(); 3237 3238 if (response_str.empty()) 3239 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3240 else 3241 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3242 } 3243 return true; 3244 } 3245 }; 3246 3247 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3248 { 3249 private: 3250 3251 public: 3252 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3253 CommandObjectMultiword (interpreter, 3254 "process plugin packet", 3255 "Commands that deal with GDB remote packets.", 3256 NULL) 3257 { 3258 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3259 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3260 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3261 } 3262 3263 ~CommandObjectProcessGDBRemotePacket () 3264 { 3265 } 3266 }; 3267 3268 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3269 { 3270 public: 3271 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3272 CommandObjectMultiword (interpreter, 3273 "process plugin", 3274 "A set of commands for operating on a ProcessGDBRemote process.", 3275 "process plugin <subcommand> [<subcommand-options>]") 3276 { 3277 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3278 } 3279 3280 ~CommandObjectMultiwordProcessGDBRemote () 3281 { 3282 } 3283 }; 3284 3285 CommandObject * 3286 ProcessGDBRemote::GetPluginCommandObject() 3287 { 3288 if (!m_command_sp) 3289 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3290 return m_command_sp.get(); 3291 } 3292
