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 // C Includes 11 #include <errno.h> 12 #include <spawn.h> 13 #include <stdlib.h> 14 #include <sys/mman.h> // for mmap 15 #include <sys/stat.h> 16 #include <sys/types.h> 17 #include <time.h> 18 19 // C++ Includes 20 #include <algorithm> 21 #include <map> 22 23 // Other libraries and framework includes 24 25 #include "lldb/Breakpoint/Watchpoint.h" 26 #include "lldb/Interpreter/Args.h" 27 #include "lldb/Core/ArchSpec.h" 28 #include "lldb/Core/Debugger.h" 29 #include "lldb/Core/ConnectionFileDescriptor.h" 30 #include "lldb/Host/FileSpec.h" 31 #include "lldb/Core/InputReader.h" 32 #include "lldb/Core/Module.h" 33 #include "lldb/Core/PluginManager.h" 34 #include "lldb/Core/State.h" 35 #include "lldb/Core/StreamFile.h" 36 #include "lldb/Core/StreamString.h" 37 #include "lldb/Core/Timer.h" 38 #include "lldb/Core/Value.h" 39 #include "lldb/Host/TimeValue.h" 40 #include "lldb/Symbol/ObjectFile.h" 41 #include "lldb/Target/DynamicLoader.h" 42 #include "lldb/Target/Target.h" 43 #include "lldb/Target/TargetList.h" 44 #include "lldb/Target/ThreadPlanCallFunction.h" 45 #include "lldb/Utility/PseudoTerminal.h" 46 47 // Project includes 48 #include "lldb/Host/Host.h" 49 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 50 #include "Utility/StringExtractorGDBRemote.h" 51 #include "GDBRemoteRegisterContext.h" 52 #include "ProcessGDBRemote.h" 53 #include "ProcessGDBRemoteLog.h" 54 #include "ThreadGDBRemote.h" 55 #include "StopInfoMachException.h" 56 57 namespace lldb 58 { 59 // Provide a function that can easily dump the packet history if we know a 60 // ProcessGDBRemote * value (which we can get from logs or from debugging). 61 // We need the function in the lldb namespace so it makes it into the final 62 // executable since the LLDB shared library only exports stuff in the lldb 63 // namespace. This allows you to attach with a debugger and call this 64 // function and get the packet history dumped to a file. 65 void 66 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 67 { 68 lldb_private::StreamFile strm; 69 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 70 if (error.Success()) 71 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 72 } 73 }; 74 75 76 #define DEBUGSERVER_BASENAME "debugserver" 77 using namespace lldb; 78 using namespace lldb_private; 79 80 static bool rand_initialized = false; 81 82 static inline uint16_t 83 get_random_port () 84 { 85 if (!rand_initialized) 86 { 87 time_t seed = time(NULL); 88 89 rand_initialized = true; 90 srand(seed); 91 } 92 return (rand() % (UINT16_MAX - 1000u)) + 1000u; 93 } 94 95 96 const char * 97 ProcessGDBRemote::GetPluginNameStatic() 98 { 99 return "gdb-remote"; 100 } 101 102 const char * 103 ProcessGDBRemote::GetPluginDescriptionStatic() 104 { 105 return "GDB Remote protocol based debugging plug-in."; 106 } 107 108 void 109 ProcessGDBRemote::Terminate() 110 { 111 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 112 } 113 114 115 lldb::ProcessSP 116 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 117 { 118 lldb::ProcessSP process_sp; 119 if (crash_file_path == NULL) 120 process_sp.reset (new ProcessGDBRemote (target, listener)); 121 return process_sp; 122 } 123 124 bool 125 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 126 { 127 if (plugin_specified_by_name) 128 return true; 129 130 // For now we are just making sure the file exists for a given module 131 Module *exe_module = target.GetExecutableModulePointer(); 132 if (exe_module) 133 { 134 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 135 // We can't debug core files... 136 switch (exe_objfile->GetType()) 137 { 138 case ObjectFile::eTypeInvalid: 139 case ObjectFile::eTypeCoreFile: 140 case ObjectFile::eTypeDebugInfo: 141 case ObjectFile::eTypeObjectFile: 142 case ObjectFile::eTypeSharedLibrary: 143 case ObjectFile::eTypeStubLibrary: 144 return false; 145 case ObjectFile::eTypeExecutable: 146 case ObjectFile::eTypeDynamicLinker: 147 case ObjectFile::eTypeUnknown: 148 break; 149 } 150 return exe_module->GetFileSpec().Exists(); 151 } 152 // However, if there is no executable module, we return true since we might be preparing to attach. 153 return true; 154 } 155 156 //---------------------------------------------------------------------- 157 // ProcessGDBRemote constructor 158 //---------------------------------------------------------------------- 159 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 160 Process (target, listener), 161 m_flags (0), 162 m_gdb_comm(false), 163 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 164 m_last_stop_packet (), 165 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 166 m_register_info (), 167 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 168 m_async_thread (LLDB_INVALID_HOST_THREAD), 169 m_thread_ids (), 170 m_continue_c_tids (), 171 m_continue_C_tids (), 172 m_continue_s_tids (), 173 m_continue_S_tids (), 174 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 175 m_max_memory_size (512), 176 m_waiting_for_attach (false), 177 m_thread_observation_bps() 178 { 179 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 180 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 181 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 182 } 183 184 //---------------------------------------------------------------------- 185 // Destructor 186 //---------------------------------------------------------------------- 187 ProcessGDBRemote::~ProcessGDBRemote() 188 { 189 // m_mach_process.UnregisterNotificationCallbacks (this); 190 Clear(); 191 // We need to call finalize on the process before destroying ourselves 192 // to make sure all of the broadcaster cleanup goes as planned. If we 193 // destruct this class, then Process::~Process() might have problems 194 // trying to fully destroy the broadcaster. 195 Finalize(); 196 } 197 198 //---------------------------------------------------------------------- 199 // PluginInterface 200 //---------------------------------------------------------------------- 201 const char * 202 ProcessGDBRemote::GetPluginName() 203 { 204 return "Process debugging plug-in that uses the GDB remote protocol"; 205 } 206 207 const char * 208 ProcessGDBRemote::GetShortPluginName() 209 { 210 return GetPluginNameStatic(); 211 } 212 213 uint32_t 214 ProcessGDBRemote::GetPluginVersion() 215 { 216 return 1; 217 } 218 219 void 220 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 221 { 222 if (!force && m_register_info.GetNumRegisters() > 0) 223 return; 224 225 char packet[128]; 226 m_register_info.Clear(); 227 uint32_t reg_offset = 0; 228 uint32_t reg_num = 0; 229 StringExtractorGDBRemote::ResponseType response_type; 230 for (response_type = StringExtractorGDBRemote::eResponse; 231 response_type == StringExtractorGDBRemote::eResponse; 232 ++reg_num) 233 { 234 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 235 assert (packet_len < sizeof(packet)); 236 StringExtractorGDBRemote response; 237 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 238 { 239 response_type = response.GetResponseType(); 240 if (response_type == StringExtractorGDBRemote::eResponse) 241 { 242 std::string name; 243 std::string value; 244 ConstString reg_name; 245 ConstString alt_name; 246 ConstString set_name; 247 RegisterInfo reg_info = { NULL, // Name 248 NULL, // Alt name 249 0, // byte size 250 reg_offset, // offset 251 eEncodingUint, // encoding 252 eFormatHex, // formate 253 { 254 LLDB_INVALID_REGNUM, // GCC reg num 255 LLDB_INVALID_REGNUM, // DWARF reg num 256 LLDB_INVALID_REGNUM, // generic reg num 257 reg_num, // GDB reg num 258 reg_num // native register number 259 }, 260 NULL, 261 NULL 262 }; 263 264 while (response.GetNameColonValue(name, value)) 265 { 266 if (name.compare("name") == 0) 267 { 268 reg_name.SetCString(value.c_str()); 269 } 270 else if (name.compare("alt-name") == 0) 271 { 272 alt_name.SetCString(value.c_str()); 273 } 274 else if (name.compare("bitsize") == 0) 275 { 276 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 277 } 278 else if (name.compare("offset") == 0) 279 { 280 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 281 if (reg_offset != offset) 282 { 283 reg_offset = offset; 284 } 285 } 286 else if (name.compare("encoding") == 0) 287 { 288 if (value.compare("uint") == 0) 289 reg_info.encoding = eEncodingUint; 290 else if (value.compare("sint") == 0) 291 reg_info.encoding = eEncodingSint; 292 else if (value.compare("ieee754") == 0) 293 reg_info.encoding = eEncodingIEEE754; 294 else if (value.compare("vector") == 0) 295 reg_info.encoding = eEncodingVector; 296 } 297 else if (name.compare("format") == 0) 298 { 299 if (value.compare("binary") == 0) 300 reg_info.format = eFormatBinary; 301 else if (value.compare("decimal") == 0) 302 reg_info.format = eFormatDecimal; 303 else if (value.compare("hex") == 0) 304 reg_info.format = eFormatHex; 305 else if (value.compare("float") == 0) 306 reg_info.format = eFormatFloat; 307 else if (value.compare("vector-sint8") == 0) 308 reg_info.format = eFormatVectorOfSInt8; 309 else if (value.compare("vector-uint8") == 0) 310 reg_info.format = eFormatVectorOfUInt8; 311 else if (value.compare("vector-sint16") == 0) 312 reg_info.format = eFormatVectorOfSInt16; 313 else if (value.compare("vector-uint16") == 0) 314 reg_info.format = eFormatVectorOfUInt16; 315 else if (value.compare("vector-sint32") == 0) 316 reg_info.format = eFormatVectorOfSInt32; 317 else if (value.compare("vector-uint32") == 0) 318 reg_info.format = eFormatVectorOfUInt32; 319 else if (value.compare("vector-float32") == 0) 320 reg_info.format = eFormatVectorOfFloat32; 321 else if (value.compare("vector-uint128") == 0) 322 reg_info.format = eFormatVectorOfUInt128; 323 } 324 else if (name.compare("set") == 0) 325 { 326 set_name.SetCString(value.c_str()); 327 } 328 else if (name.compare("gcc") == 0) 329 { 330 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 331 } 332 else if (name.compare("dwarf") == 0) 333 { 334 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 335 } 336 else if (name.compare("generic") == 0) 337 { 338 if (value.compare("pc") == 0) 339 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; 340 else if (value.compare("sp") == 0) 341 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; 342 else if (value.compare("fp") == 0) 343 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; 344 else if (value.compare("ra") == 0) 345 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; 346 else if (value.compare("flags") == 0) 347 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS; 348 else if (value.find("arg") == 0) 349 { 350 if (value.size() == 4) 351 { 352 switch (value[3]) 353 { 354 case '1': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG1; break; 355 case '2': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG2; break; 356 case '3': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG3; break; 357 case '4': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG4; break; 358 case '5': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG5; break; 359 case '6': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG6; break; 360 case '7': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG7; break; 361 case '8': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG8; break; 362 } 363 } 364 } 365 } 366 } 367 368 reg_info.byte_offset = reg_offset; 369 assert (reg_info.byte_size != 0); 370 reg_offset += reg_info.byte_size; 371 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 372 } 373 } 374 else 375 { 376 response_type = StringExtractorGDBRemote::eError; 377 break; 378 } 379 } 380 381 if (reg_num == 0) 382 { 383 // We didn't get anything. See if we are debugging ARM and fill with 384 // a hard coded register set until we can get an updated debugserver 385 // down on the devices. 386 387 if (!GetTarget().GetArchitecture().IsValid() 388 && m_gdb_comm.GetHostArchitecture().IsValid() 389 && m_gdb_comm.GetHostArchitecture().GetMachine() == llvm::Triple::arm 390 && m_gdb_comm.GetHostArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) 391 { 392 m_register_info.HardcodeARMRegisters(); 393 } 394 else if (GetTarget().GetArchitecture().GetMachine() == llvm::Triple::arm) 395 { 396 m_register_info.HardcodeARMRegisters(); 397 } 398 } 399 m_register_info.Finalize (); 400 } 401 402 Error 403 ProcessGDBRemote::WillLaunch (Module* module) 404 { 405 return WillLaunchOrAttach (); 406 } 407 408 Error 409 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 410 { 411 return WillLaunchOrAttach (); 412 } 413 414 Error 415 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 416 { 417 return WillLaunchOrAttach (); 418 } 419 420 Error 421 ProcessGDBRemote::DoConnectRemote (const char *remote_url) 422 { 423 Error error (WillLaunchOrAttach ()); 424 425 if (error.Fail()) 426 return error; 427 428 error = ConnectToDebugserver (remote_url); 429 430 if (error.Fail()) 431 return error; 432 StartAsyncThread (); 433 434 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 435 if (pid == LLDB_INVALID_PROCESS_ID) 436 { 437 // We don't have a valid process ID, so note that we are connected 438 // and could now request to launch or attach, or get remote process 439 // listings... 440 SetPrivateState (eStateConnected); 441 } 442 else 443 { 444 // We have a valid process 445 SetID (pid); 446 GetThreadList(); 447 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 448 { 449 const StateType state = SetThreadStopInfo (m_last_stop_packet); 450 if (state == eStateStopped) 451 { 452 SetPrivateState (state); 453 } 454 else 455 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 456 } 457 else 458 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 459 } 460 return error; 461 } 462 463 Error 464 ProcessGDBRemote::WillLaunchOrAttach () 465 { 466 Error error; 467 m_stdio_communication.Clear (); 468 return error; 469 } 470 471 //---------------------------------------------------------------------- 472 // Process Control 473 //---------------------------------------------------------------------- 474 Error 475 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 476 { 477 Error error; 478 479 uint32_t launch_flags = launch_info.GetFlags().Get(); 480 const char *stdin_path = NULL; 481 const char *stdout_path = NULL; 482 const char *stderr_path = NULL; 483 const char *working_dir = launch_info.GetWorkingDirectory(); 484 485 const ProcessLaunchInfo::FileAction *file_action; 486 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 487 if (file_action) 488 { 489 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 490 stdin_path = file_action->GetPath(); 491 } 492 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 493 if (file_action) 494 { 495 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 496 stdout_path = file_action->GetPath(); 497 } 498 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 499 if (file_action) 500 { 501 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 502 stderr_path = file_action->GetPath(); 503 } 504 505 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 506 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 507 // ::LogSetLogFile ("/dev/stdout"); 508 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 509 510 ObjectFile * object_file = exe_module->GetObjectFile(); 511 if (object_file) 512 { 513 char host_port[128]; 514 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 515 char connect_url[128]; 516 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 517 518 // Make sure we aren't already connected? 519 if (!m_gdb_comm.IsConnected()) 520 { 521 error = StartDebugserverProcess (host_port, launch_info); 522 if (error.Fail()) 523 { 524 if (log) 525 log->Printf("failed to start debugserver process: %s", error.AsCString()); 526 return error; 527 } 528 529 error = ConnectToDebugserver (connect_url); 530 } 531 532 if (error.Success()) 533 { 534 lldb_utility::PseudoTerminal pty; 535 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 536 537 // If the debugserver is local and we aren't disabling STDIO, lets use 538 // a pseudo terminal to instead of relying on the 'O' packets for stdio 539 // since 'O' packets can really slow down debugging if the inferior 540 // does a lot of output. 541 PlatformSP platform_sp (m_target.GetPlatform()); 542 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 543 { 544 const char *slave_name = NULL; 545 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 546 { 547 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 548 slave_name = pty.GetSlaveName (NULL, 0); 549 } 550 if (stdin_path == NULL) 551 stdin_path = slave_name; 552 553 if (stdout_path == NULL) 554 stdout_path = slave_name; 555 556 if (stderr_path == NULL) 557 stderr_path = slave_name; 558 } 559 560 // Set STDIN to /dev/null if we want STDIO disabled or if either 561 // STDOUT or STDERR have been set to something and STDIN hasn't 562 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 563 stdin_path = "/dev/null"; 564 565 // Set STDOUT to /dev/null if we want STDIO disabled or if either 566 // STDIN or STDERR have been set to something and STDOUT hasn't 567 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 568 stdout_path = "/dev/null"; 569 570 // Set STDERR to /dev/null if we want STDIO disabled or if either 571 // STDIN or STDOUT have been set to something and STDERR hasn't 572 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 573 stderr_path = "/dev/null"; 574 575 if (stdin_path) 576 m_gdb_comm.SetSTDIN (stdin_path); 577 if (stdout_path) 578 m_gdb_comm.SetSTDOUT (stdout_path); 579 if (stderr_path) 580 m_gdb_comm.SetSTDERR (stderr_path); 581 582 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 583 584 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 585 586 if (working_dir && working_dir[0]) 587 { 588 m_gdb_comm.SetWorkingDir (working_dir); 589 } 590 591 // Send the environment and the program + arguments after we connect 592 const Args &environment = launch_info.GetEnvironmentEntries(); 593 if (environment.GetArgumentCount()) 594 { 595 size_t num_environment_entries = environment.GetArgumentCount(); 596 for (size_t i=0; i<num_environment_entries; ++i) 597 { 598 const char *env_entry = environment.GetArgumentAtIndex(i); 599 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 600 break; 601 } 602 } 603 604 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 605 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 606 if (arg_packet_err == 0) 607 { 608 std::string error_str; 609 if (m_gdb_comm.GetLaunchSuccess (error_str)) 610 { 611 SetID (m_gdb_comm.GetCurrentProcessID ()); 612 } 613 else 614 { 615 error.SetErrorString (error_str.c_str()); 616 } 617 } 618 else 619 { 620 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 621 } 622 623 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 624 625 if (GetID() == LLDB_INVALID_PROCESS_ID) 626 { 627 if (log) 628 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 629 KillDebugserverProcess (); 630 return error; 631 } 632 633 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 634 { 635 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 636 637 if (!disable_stdio) 638 { 639 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 640 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 641 } 642 } 643 } 644 else 645 { 646 if (log) 647 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 648 } 649 } 650 else 651 { 652 // Set our user ID to an invalid process ID. 653 SetID(LLDB_INVALID_PROCESS_ID); 654 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 655 exe_module->GetFileSpec().GetFilename().AsCString(), 656 exe_module->GetArchitecture().GetArchitectureName()); 657 } 658 return error; 659 660 } 661 662 663 Error 664 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 665 { 666 Error error; 667 // Sleep and wait a bit for debugserver to start to listen... 668 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 669 if (conn_ap.get()) 670 { 671 const uint32_t max_retry_count = 50; 672 uint32_t retry_count = 0; 673 while (!m_gdb_comm.IsConnected()) 674 { 675 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 676 { 677 m_gdb_comm.SetConnection (conn_ap.release()); 678 break; 679 } 680 retry_count++; 681 682 if (retry_count >= max_retry_count) 683 break; 684 685 usleep (100000); 686 } 687 } 688 689 if (!m_gdb_comm.IsConnected()) 690 { 691 if (error.Success()) 692 error.SetErrorString("not connected to remote gdb server"); 693 return error; 694 } 695 696 // We always seem to be able to open a connection to a local port 697 // so we need to make sure we can then send data to it. If we can't 698 // then we aren't actually connected to anything, so try and do the 699 // handshake with the remote GDB server and make sure that goes 700 // alright. 701 if (!m_gdb_comm.HandshakeWithServer (NULL)) 702 { 703 m_gdb_comm.Disconnect(); 704 if (error.Success()) 705 error.SetErrorString("not connected to remote gdb server"); 706 return error; 707 } 708 m_gdb_comm.ResetDiscoverableSettings(); 709 m_gdb_comm.QueryNoAckModeSupported (); 710 m_gdb_comm.GetThreadSuffixSupported (); 711 m_gdb_comm.GetListThreadsInStopReplySupported (); 712 m_gdb_comm.GetHostInfo (); 713 m_gdb_comm.GetVContSupported ('c'); 714 return error; 715 } 716 717 void 718 ProcessGDBRemote::DidLaunchOrAttach () 719 { 720 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 721 if (log) 722 log->Printf ("ProcessGDBRemote::DidLaunch()"); 723 if (GetID() != LLDB_INVALID_PROCESS_ID) 724 { 725 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 726 727 BuildDynamicRegisterInfo (false); 728 729 // See if the GDB server supports the qHostInfo information 730 731 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 732 if (gdb_remote_arch.IsValid()) 733 { 734 ArchSpec &target_arch = GetTarget().GetArchitecture(); 735 736 if (target_arch.IsValid()) 737 { 738 // If the remote host is ARM and we have apple as the vendor, then 739 // ARM executables and shared libraries can have mixed ARM architectures. 740 // You can have an armv6 executable, and if the host is armv7, then the 741 // system will load the best possible architecture for all shared libraries 742 // it has, so we really need to take the remote host architecture as our 743 // defacto architecture in this case. 744 745 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 746 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 747 { 748 target_arch = gdb_remote_arch; 749 } 750 else 751 { 752 // Fill in what is missing in the triple 753 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 754 llvm::Triple &target_triple = target_arch.GetTriple(); 755 if (target_triple.getVendorName().size() == 0) 756 { 757 target_triple.setVendor (remote_triple.getVendor()); 758 759 if (target_triple.getOSName().size() == 0) 760 { 761 target_triple.setOS (remote_triple.getOS()); 762 763 if (target_triple.getEnvironmentName().size() == 0) 764 target_triple.setEnvironment (remote_triple.getEnvironment()); 765 } 766 } 767 } 768 } 769 else 770 { 771 // The target doesn't have a valid architecture yet, set it from 772 // the architecture we got from the remote GDB server 773 target_arch = gdb_remote_arch; 774 } 775 } 776 } 777 } 778 779 void 780 ProcessGDBRemote::DidLaunch () 781 { 782 DidLaunchOrAttach (); 783 } 784 785 Error 786 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 787 { 788 ProcessAttachInfo attach_info; 789 return DoAttachToProcessWithID(attach_pid, attach_info); 790 } 791 792 Error 793 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 794 { 795 Error error; 796 // Clear out and clean up from any current state 797 Clear(); 798 if (attach_pid != LLDB_INVALID_PROCESS_ID) 799 { 800 // Make sure we aren't already connected? 801 if (!m_gdb_comm.IsConnected()) 802 { 803 char host_port[128]; 804 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 805 char connect_url[128]; 806 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 807 808 error = StartDebugserverProcess (host_port, attach_info); 809 810 if (error.Fail()) 811 { 812 const char *error_string = error.AsCString(); 813 if (error_string == NULL) 814 error_string = "unable to launch " DEBUGSERVER_BASENAME; 815 816 SetExitStatus (-1, error_string); 817 } 818 else 819 { 820 error = ConnectToDebugserver (connect_url); 821 } 822 } 823 824 if (error.Success()) 825 { 826 char packet[64]; 827 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%llx", attach_pid); 828 SetID (attach_pid); 829 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 830 } 831 } 832 return error; 833 } 834 835 size_t 836 ProcessGDBRemote::AttachInputReaderCallback 837 ( 838 void *baton, 839 InputReader *reader, 840 lldb::InputReaderAction notification, 841 const char *bytes, 842 size_t bytes_len 843 ) 844 { 845 if (notification == eInputReaderGotToken) 846 { 847 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 848 if (gdb_process->m_waiting_for_attach) 849 gdb_process->m_waiting_for_attach = false; 850 reader->SetIsDone(true); 851 return 1; 852 } 853 return 0; 854 } 855 856 Error 857 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 858 { 859 Error error; 860 // Clear out and clean up from any current state 861 Clear(); 862 863 if (process_name && process_name[0]) 864 { 865 // Make sure we aren't already connected? 866 if (!m_gdb_comm.IsConnected()) 867 { 868 char host_port[128]; 869 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 870 char connect_url[128]; 871 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 872 873 error = StartDebugserverProcess (host_port, attach_info); 874 if (error.Fail()) 875 { 876 const char *error_string = error.AsCString(); 877 if (error_string == NULL) 878 error_string = "unable to launch " DEBUGSERVER_BASENAME; 879 880 SetExitStatus (-1, error_string); 881 } 882 else 883 { 884 error = ConnectToDebugserver (connect_url); 885 } 886 } 887 888 if (error.Success()) 889 { 890 StreamString packet; 891 892 if (wait_for_launch) 893 packet.PutCString("vAttachWait"); 894 else 895 packet.PutCString("vAttachName"); 896 packet.PutChar(';'); 897 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 898 899 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 900 901 } 902 } 903 return error; 904 } 905 906 907 void 908 ProcessGDBRemote::DidAttach () 909 { 910 DidLaunchOrAttach (); 911 } 912 913 Error 914 ProcessGDBRemote::WillResume () 915 { 916 m_continue_c_tids.clear(); 917 m_continue_C_tids.clear(); 918 m_continue_s_tids.clear(); 919 m_continue_S_tids.clear(); 920 return Error(); 921 } 922 923 Error 924 ProcessGDBRemote::DoResume () 925 { 926 Error error; 927 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 928 if (log) 929 log->Printf ("ProcessGDBRemote::Resume()"); 930 931 Listener listener ("gdb-remote.resume-packet-sent"); 932 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 933 { 934 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 935 936 StreamString continue_packet; 937 bool continue_packet_error = false; 938 if (m_gdb_comm.HasAnyVContSupport ()) 939 { 940 continue_packet.PutCString ("vCont"); 941 942 if (!m_continue_c_tids.empty()) 943 { 944 if (m_gdb_comm.GetVContSupported ('c')) 945 { 946 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) 947 continue_packet.Printf(";c:%4.4llx", *t_pos); 948 } 949 else 950 continue_packet_error = true; 951 } 952 953 if (!continue_packet_error && !m_continue_C_tids.empty()) 954 { 955 if (m_gdb_comm.GetVContSupported ('C')) 956 { 957 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) 958 continue_packet.Printf(";C%2.2x:%4.4llx", s_pos->second, s_pos->first); 959 } 960 else 961 continue_packet_error = true; 962 } 963 964 if (!continue_packet_error && !m_continue_s_tids.empty()) 965 { 966 if (m_gdb_comm.GetVContSupported ('s')) 967 { 968 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) 969 continue_packet.Printf(";s:%4.4llx", *t_pos); 970 } 971 else 972 continue_packet_error = true; 973 } 974 975 if (!continue_packet_error && !m_continue_S_tids.empty()) 976 { 977 if (m_gdb_comm.GetVContSupported ('S')) 978 { 979 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) 980 continue_packet.Printf(";S%2.2x:%4.4llx", s_pos->second, s_pos->first); 981 } 982 else 983 continue_packet_error = true; 984 } 985 986 if (continue_packet_error) 987 continue_packet.GetString().clear(); 988 } 989 else 990 continue_packet_error = true; 991 992 if (continue_packet_error) 993 { 994 // Either no vCont support, or we tried to use part of the vCont 995 // packet that wasn't supported by the remote GDB server. 996 // We need to try and make a simple packet that can do our continue 997 const size_t num_threads = GetThreadList().GetSize(); 998 const size_t num_continue_c_tids = m_continue_c_tids.size(); 999 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1000 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1001 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1002 if (num_continue_c_tids > 0) 1003 { 1004 if (num_continue_c_tids == num_threads) 1005 { 1006 // All threads are resuming... 1007 m_gdb_comm.SetCurrentThreadForRun (-1); 1008 continue_packet.PutChar ('c'); 1009 continue_packet_error = false; 1010 } 1011 else if (num_continue_c_tids == 1 && 1012 num_continue_C_tids == 0 && 1013 num_continue_s_tids == 0 && 1014 num_continue_S_tids == 0 ) 1015 { 1016 // Only one thread is continuing 1017 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1018 continue_packet.PutChar ('c'); 1019 continue_packet_error = false; 1020 } 1021 } 1022 1023 if (continue_packet_error && num_continue_C_tids > 0) 1024 { 1025 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1026 num_continue_C_tids > 0 && 1027 num_continue_s_tids == 0 && 1028 num_continue_S_tids == 0 ) 1029 { 1030 const int continue_signo = m_continue_C_tids.front().second; 1031 // Only one thread is continuing 1032 if (num_continue_C_tids > 1) 1033 { 1034 // More that one thread with a signal, yet we don't have 1035 // vCont support and we are being asked to resume each 1036 // thread with a signal, we need to make sure they are 1037 // all the same signal, or we can't issue the continue 1038 // accurately with the current support... 1039 if (num_continue_C_tids > 1) 1040 { 1041 continue_packet_error = false; 1042 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1043 { 1044 if (m_continue_C_tids[i].second != continue_signo) 1045 continue_packet_error = true; 1046 } 1047 } 1048 if (!continue_packet_error) 1049 m_gdb_comm.SetCurrentThreadForRun (-1); 1050 } 1051 else 1052 { 1053 // Set the continue thread ID 1054 continue_packet_error = false; 1055 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1056 } 1057 if (!continue_packet_error) 1058 { 1059 // Add threads continuing with the same signo... 1060 continue_packet.Printf("C%2.2x", continue_signo); 1061 } 1062 } 1063 } 1064 1065 if (continue_packet_error && num_continue_s_tids > 0) 1066 { 1067 if (num_continue_s_tids == num_threads) 1068 { 1069 // All threads are resuming... 1070 m_gdb_comm.SetCurrentThreadForRun (-1); 1071 continue_packet.PutChar ('s'); 1072 continue_packet_error = false; 1073 } 1074 else if (num_continue_c_tids == 0 && 1075 num_continue_C_tids == 0 && 1076 num_continue_s_tids == 1 && 1077 num_continue_S_tids == 0 ) 1078 { 1079 // Only one thread is stepping 1080 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1081 continue_packet.PutChar ('s'); 1082 continue_packet_error = false; 1083 } 1084 } 1085 1086 if (!continue_packet_error && num_continue_S_tids > 0) 1087 { 1088 if (num_continue_S_tids == num_threads) 1089 { 1090 const int step_signo = m_continue_S_tids.front().second; 1091 // Are all threads trying to step with the same signal? 1092 continue_packet_error = false; 1093 if (num_continue_S_tids > 1) 1094 { 1095 for (size_t i=1; i<num_threads; ++i) 1096 { 1097 if (m_continue_S_tids[i].second != step_signo) 1098 continue_packet_error = true; 1099 } 1100 } 1101 if (!continue_packet_error) 1102 { 1103 // Add threads stepping with the same signo... 1104 m_gdb_comm.SetCurrentThreadForRun (-1); 1105 continue_packet.Printf("S%2.2x", step_signo); 1106 } 1107 } 1108 else if (num_continue_c_tids == 0 && 1109 num_continue_C_tids == 0 && 1110 num_continue_s_tids == 0 && 1111 num_continue_S_tids == 1 ) 1112 { 1113 // Only one thread is stepping with signal 1114 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1115 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1116 continue_packet_error = false; 1117 } 1118 } 1119 } 1120 1121 if (continue_packet_error) 1122 { 1123 error.SetErrorString ("can't make continue packet for this resume"); 1124 } 1125 else 1126 { 1127 EventSP event_sp; 1128 TimeValue timeout; 1129 timeout = TimeValue::Now(); 1130 timeout.OffsetWithSeconds (5); 1131 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1132 { 1133 error.SetErrorString ("Trying to resume but the async thread is dead."); 1134 if (log) 1135 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1136 return error; 1137 } 1138 1139 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1140 1141 if (listener.WaitForEvent (&timeout, event_sp) == false) 1142 { 1143 error.SetErrorString("Resume timed out."); 1144 if (log) 1145 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1146 } 1147 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1148 { 1149 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1150 if (log) 1151 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1152 return error; 1153 } 1154 } 1155 } 1156 1157 return error; 1158 } 1159 1160 void 1161 ProcessGDBRemote::ClearThreadIDList () 1162 { 1163 Mutex::Locker locker(m_thread_list.GetMutex()); 1164 m_thread_ids.clear(); 1165 } 1166 1167 bool 1168 ProcessGDBRemote::UpdateThreadIDList () 1169 { 1170 Mutex::Locker locker(m_thread_list.GetMutex()); 1171 bool sequence_mutex_unavailable = false; 1172 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1173 if (sequence_mutex_unavailable) 1174 { 1175 #if defined (LLDB_CONFIGURATION_DEBUG) 1176 assert(!"ProcessGDBRemote::UpdateThreadList() failed due to not getting the sequence mutex"); 1177 #endif 1178 return false; // We just didn't get the list 1179 } 1180 return true; 1181 } 1182 1183 bool 1184 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1185 { 1186 // locker will keep a mutex locked until it goes out of scope 1187 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1188 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1189 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1190 1191 size_t num_thread_ids = m_thread_ids.size(); 1192 // The "m_thread_ids" thread ID list should always be updated after each stop 1193 // reply packet, but in case it isn't, update it here. 1194 if (num_thread_ids == 0) 1195 { 1196 if (!UpdateThreadIDList ()) 1197 return false; 1198 num_thread_ids = m_thread_ids.size(); 1199 } 1200 1201 if (num_thread_ids > 0) 1202 { 1203 for (size_t i=0; i<num_thread_ids; ++i) 1204 { 1205 tid_t tid = m_thread_ids[i]; 1206 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1207 if (!thread_sp) 1208 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1209 new_thread_list.AddThread(thread_sp); 1210 } 1211 } 1212 1213 return true; 1214 } 1215 1216 1217 StateType 1218 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1219 { 1220 stop_packet.SetFilePos (0); 1221 const char stop_type = stop_packet.GetChar(); 1222 switch (stop_type) 1223 { 1224 case 'T': 1225 case 'S': 1226 { 1227 if (GetStopID() == 0) 1228 { 1229 // Our first stop, make sure we have a process ID, and also make 1230 // sure we know about our registers 1231 if (GetID() == LLDB_INVALID_PROCESS_ID) 1232 { 1233 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1234 if (pid != LLDB_INVALID_PROCESS_ID) 1235 SetID (pid); 1236 } 1237 BuildDynamicRegisterInfo (true); 1238 } 1239 // Stop with signal and thread info 1240 const uint8_t signo = stop_packet.GetHexU8(); 1241 std::string name; 1242 std::string value; 1243 std::string thread_name; 1244 std::string reason; 1245 std::string description; 1246 uint32_t exc_type = 0; 1247 std::vector<addr_t> exc_data; 1248 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1249 uint32_t exc_data_count = 0; 1250 ThreadSP thread_sp; 1251 1252 while (stop_packet.GetNameColonValue(name, value)) 1253 { 1254 if (name.compare("metype") == 0) 1255 { 1256 // exception type in big endian hex 1257 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1258 } 1259 else if (name.compare("mecount") == 0) 1260 { 1261 // exception count in big endian hex 1262 exc_data_count = Args::StringToUInt32 (value.c_str(), 0, 16); 1263 } 1264 else if (name.compare("medata") == 0) 1265 { 1266 // exception data in big endian hex 1267 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1268 } 1269 else if (name.compare("thread") == 0) 1270 { 1271 // thread in big endian hex 1272 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1273 // m_thread_list does have its own mutex, but we need to 1274 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1275 // and the m_thread_list.AddThread(...) so it doesn't change on us 1276 Mutex::Locker locker (m_thread_list.GetMutex ()); 1277 thread_sp = m_thread_list.FindThreadByID(tid, false); 1278 if (!thread_sp) 1279 { 1280 // Create the thread if we need to 1281 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1282 m_thread_list.AddThread(thread_sp); 1283 } 1284 } 1285 else if (name.compare("threads") == 0) 1286 { 1287 Mutex::Locker locker(m_thread_list.GetMutex()); 1288 m_thread_ids.clear(); 1289 // A comma separated list of all threads in the current 1290 // process that includes the thread for this stop reply 1291 // packet 1292 size_t comma_pos; 1293 lldb::tid_t tid; 1294 while ((comma_pos = value.find(',')) != std::string::npos) 1295 { 1296 value[comma_pos] = '\0'; 1297 // thread in big endian hex 1298 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1299 if (tid != LLDB_INVALID_THREAD_ID) 1300 m_thread_ids.push_back (tid); 1301 value.erase(0, comma_pos + 1); 1302 1303 } 1304 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1305 if (tid != LLDB_INVALID_THREAD_ID) 1306 m_thread_ids.push_back (tid); 1307 } 1308 else if (name.compare("hexname") == 0) 1309 { 1310 StringExtractor name_extractor; 1311 // Swap "value" over into "name_extractor" 1312 name_extractor.GetStringRef().swap(value); 1313 // Now convert the HEX bytes into a string value 1314 name_extractor.GetHexByteString (value); 1315 thread_name.swap (value); 1316 } 1317 else if (name.compare("name") == 0) 1318 { 1319 thread_name.swap (value); 1320 } 1321 else if (name.compare("qaddr") == 0) 1322 { 1323 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1324 } 1325 else if (name.compare("reason") == 0) 1326 { 1327 reason.swap(value); 1328 } 1329 else if (name.compare("description") == 0) 1330 { 1331 StringExtractor desc_extractor; 1332 // Swap "value" over into "name_extractor" 1333 desc_extractor.GetStringRef().swap(value); 1334 // Now convert the HEX bytes into a string value 1335 desc_extractor.GetHexByteString (thread_name); 1336 } 1337 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1338 { 1339 // We have a register number that contains an expedited 1340 // register value. Lets supply this register to our thread 1341 // so it won't have to go and read it. 1342 if (thread_sp) 1343 { 1344 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1345 1346 if (reg != UINT32_MAX) 1347 { 1348 StringExtractor reg_value_extractor; 1349 // Swap "value" over into "reg_value_extractor" 1350 reg_value_extractor.GetStringRef().swap(value); 1351 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1352 { 1353 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1354 name.c_str(), 1355 reg, 1356 reg, 1357 reg_value_extractor.GetStringRef().c_str(), 1358 stop_packet.GetStringRef().c_str()); 1359 } 1360 } 1361 } 1362 } 1363 } 1364 1365 if (thread_sp) 1366 { 1367 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1368 1369 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1370 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1371 if (exc_type != 0) 1372 { 1373 const size_t exc_data_size = exc_data.size(); 1374 1375 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1376 exc_type, 1377 exc_data_size, 1378 exc_data_size >= 1 ? exc_data[0] : 0, 1379 exc_data_size >= 2 ? exc_data[1] : 0, 1380 exc_data_size >= 3 ? exc_data[2] : 0)); 1381 } 1382 else 1383 { 1384 bool handled = false; 1385 if (!reason.empty()) 1386 { 1387 if (reason.compare("trace") == 0) 1388 { 1389 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1390 handled = true; 1391 } 1392 else if (reason.compare("breakpoint") == 0) 1393 { 1394 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1395 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1396 if (bp_site_sp) 1397 { 1398 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1399 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1400 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1401 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1402 { 1403 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1404 handled = true; 1405 } 1406 } 1407 1408 if (!handled) 1409 { 1410 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1411 } 1412 } 1413 else if (reason.compare("trap") == 0) 1414 { 1415 // Let the trap just use the standard signal stop reason below... 1416 } 1417 else if (reason.compare("watchpoint") == 0) 1418 { 1419 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1420 // TODO: locate the watchpoint somehow... 1421 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1422 handled = true; 1423 } 1424 else if (reason.compare("exception") == 0) 1425 { 1426 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1427 handled = true; 1428 } 1429 } 1430 1431 if (signo) 1432 { 1433 if (signo == SIGTRAP) 1434 { 1435 // Currently we are going to assume SIGTRAP means we are either 1436 // hitting a breakpoint or hardware single stepping. 1437 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1438 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1439 if (bp_site_sp) 1440 { 1441 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1442 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1443 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1444 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1445 { 1446 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1447 handled = true; 1448 } 1449 } 1450 if (!handled) 1451 { 1452 // TODO: check for breakpoint or trap opcode in case there is a hard 1453 // coded software trap 1454 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1455 handled = true; 1456 } 1457 } 1458 if (!handled) 1459 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1460 } 1461 else 1462 { 1463 StopInfoSP invalid_stop_info_sp; 1464 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1465 } 1466 1467 if (!description.empty()) 1468 { 1469 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1470 if (stop_info_sp) 1471 { 1472 stop_info_sp->SetDescription (description.c_str()); 1473 } 1474 else 1475 { 1476 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1477 } 1478 } 1479 } 1480 } 1481 return eStateStopped; 1482 } 1483 break; 1484 1485 case 'W': 1486 // process exited 1487 return eStateExited; 1488 1489 default: 1490 break; 1491 } 1492 return eStateInvalid; 1493 } 1494 1495 void 1496 ProcessGDBRemote::RefreshStateAfterStop () 1497 { 1498 Mutex::Locker locker(m_thread_list.GetMutex()); 1499 m_thread_ids.clear(); 1500 // Set the thread stop info. It might have a "threads" key whose value is 1501 // a list of all thread IDs in the current process, so m_thread_ids might 1502 // get set. 1503 SetThreadStopInfo (m_last_stop_packet); 1504 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1505 if (m_thread_ids.empty()) 1506 { 1507 // No, we need to fetch the thread list manually 1508 UpdateThreadIDList(); 1509 } 1510 1511 // Let all threads recover from stopping and do any clean up based 1512 // on the previous thread state (if any). 1513 m_thread_list.RefreshStateAfterStop(); 1514 1515 } 1516 1517 Error 1518 ProcessGDBRemote::DoHalt (bool &caused_stop) 1519 { 1520 Error error; 1521 1522 bool timed_out = false; 1523 Mutex::Locker locker; 1524 1525 if (m_public_state.GetValue() == eStateAttaching) 1526 { 1527 // We are being asked to halt during an attach. We need to just close 1528 // our file handle and debugserver will go away, and we can be done... 1529 m_gdb_comm.Disconnect(); 1530 } 1531 else 1532 { 1533 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1534 { 1535 if (timed_out) 1536 error.SetErrorString("timed out sending interrupt packet"); 1537 else 1538 error.SetErrorString("unknown error sending interrupt packet"); 1539 } 1540 1541 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1542 } 1543 return error; 1544 } 1545 1546 Error 1547 ProcessGDBRemote::InterruptIfRunning 1548 ( 1549 bool discard_thread_plans, 1550 bool catch_stop_event, 1551 EventSP &stop_event_sp 1552 ) 1553 { 1554 Error error; 1555 1556 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1557 1558 bool paused_private_state_thread = false; 1559 const bool is_running = m_gdb_comm.IsRunning(); 1560 if (log) 1561 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1562 discard_thread_plans, 1563 catch_stop_event, 1564 is_running); 1565 1566 if (discard_thread_plans) 1567 { 1568 if (log) 1569 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1570 m_thread_list.DiscardThreadPlans(); 1571 } 1572 if (is_running) 1573 { 1574 if (catch_stop_event) 1575 { 1576 if (log) 1577 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1578 PausePrivateStateThread(); 1579 paused_private_state_thread = true; 1580 } 1581 1582 bool timed_out = false; 1583 Mutex::Locker locker; 1584 1585 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1586 { 1587 if (timed_out) 1588 error.SetErrorString("timed out sending interrupt packet"); 1589 else 1590 error.SetErrorString("unknown error sending interrupt packet"); 1591 if (paused_private_state_thread) 1592 ResumePrivateStateThread(); 1593 return error; 1594 } 1595 1596 if (catch_stop_event) 1597 { 1598 // LISTEN HERE 1599 TimeValue timeout_time; 1600 timeout_time = TimeValue::Now(); 1601 timeout_time.OffsetWithSeconds(5); 1602 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1603 1604 timed_out = state == eStateInvalid; 1605 if (log) 1606 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1607 1608 if (timed_out) 1609 error.SetErrorString("unable to verify target stopped"); 1610 } 1611 1612 if (paused_private_state_thread) 1613 { 1614 if (log) 1615 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1616 ResumePrivateStateThread(); 1617 } 1618 } 1619 return error; 1620 } 1621 1622 Error 1623 ProcessGDBRemote::WillDetach () 1624 { 1625 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1626 if (log) 1627 log->Printf ("ProcessGDBRemote::WillDetach()"); 1628 1629 bool discard_thread_plans = true; 1630 bool catch_stop_event = true; 1631 EventSP event_sp; 1632 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1633 } 1634 1635 Error 1636 ProcessGDBRemote::DoDetach() 1637 { 1638 Error error; 1639 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1640 if (log) 1641 log->Printf ("ProcessGDBRemote::DoDetach()"); 1642 1643 DisableAllBreakpointSites (); 1644 1645 m_thread_list.DiscardThreadPlans(); 1646 1647 bool success = m_gdb_comm.Detach (); 1648 if (log) 1649 { 1650 if (success) 1651 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1652 else 1653 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1654 } 1655 // Sleep for one second to let the process get all detached... 1656 StopAsyncThread (); 1657 1658 SetPrivateState (eStateDetached); 1659 ResumePrivateStateThread(); 1660 1661 //KillDebugserverProcess (); 1662 return error; 1663 } 1664 1665 Error 1666 ProcessGDBRemote::DoDestroy () 1667 { 1668 Error error; 1669 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1670 if (log) 1671 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1672 1673 // Interrupt if our inferior is running... 1674 if (m_gdb_comm.IsConnected()) 1675 { 1676 if (m_public_state.GetValue() != eStateAttaching) 1677 { 1678 1679 StringExtractorGDBRemote response; 1680 bool send_async = true; 1681 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1682 { 1683 char packet_cmd = response.GetChar(0); 1684 1685 if (packet_cmd == 'W' || packet_cmd == 'X') 1686 { 1687 SetLastStopPacket (response); 1688 ClearThreadIDList (); 1689 SetExitStatus(response.GetHexU8(), NULL); 1690 } 1691 } 1692 else 1693 { 1694 SetExitStatus(SIGABRT, NULL); 1695 //error.SetErrorString("kill packet failed"); 1696 } 1697 } 1698 } 1699 StopAsyncThread (); 1700 KillDebugserverProcess (); 1701 return error; 1702 } 1703 1704 //------------------------------------------------------------------ 1705 // Process Queries 1706 //------------------------------------------------------------------ 1707 1708 bool 1709 ProcessGDBRemote::IsAlive () 1710 { 1711 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1712 } 1713 1714 addr_t 1715 ProcessGDBRemote::GetImageInfoAddress() 1716 { 1717 return m_gdb_comm.GetShlibInfoAddr(); 1718 } 1719 1720 //------------------------------------------------------------------ 1721 // Process Memory 1722 //------------------------------------------------------------------ 1723 size_t 1724 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1725 { 1726 if (size > m_max_memory_size) 1727 { 1728 // Keep memory read sizes down to a sane limit. This function will be 1729 // called multiple times in order to complete the task by 1730 // lldb_private::Process so it is ok to do this. 1731 size = m_max_memory_size; 1732 } 1733 1734 char packet[64]; 1735 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%zx", (uint64_t)addr, size); 1736 assert (packet_len + 1 < sizeof(packet)); 1737 StringExtractorGDBRemote response; 1738 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1739 { 1740 if (response.IsNormalResponse()) 1741 { 1742 error.Clear(); 1743 return response.GetHexBytes(buf, size, '\xdd'); 1744 } 1745 else if (response.IsErrorResponse()) 1746 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1747 else if (response.IsUnsupportedResponse()) 1748 error.SetErrorStringWithFormat("'%s' packet unsupported", packet); 1749 else 1750 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet, response.GetStringRef().c_str()); 1751 } 1752 else 1753 { 1754 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1755 } 1756 return 0; 1757 } 1758 1759 size_t 1760 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1761 { 1762 if (size > m_max_memory_size) 1763 { 1764 // Keep memory read sizes down to a sane limit. This function will be 1765 // called multiple times in order to complete the task by 1766 // lldb_private::Process so it is ok to do this. 1767 size = m_max_memory_size; 1768 } 1769 1770 StreamString packet; 1771 packet.Printf("M%llx,%zx:", addr, size); 1772 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1773 StringExtractorGDBRemote response; 1774 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1775 { 1776 if (response.IsOKResponse()) 1777 { 1778 error.Clear(); 1779 return size; 1780 } 1781 else if (response.IsErrorResponse()) 1782 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1783 else if (response.IsUnsupportedResponse()) 1784 error.SetErrorStringWithFormat("'%s' packet unsupported", packet.GetString().c_str()); 1785 else 1786 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1787 } 1788 else 1789 { 1790 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1791 } 1792 return 0; 1793 } 1794 1795 lldb::addr_t 1796 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1797 { 1798 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1799 1800 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1801 switch (supported) 1802 { 1803 case eLazyBoolCalculate: 1804 case eLazyBoolYes: 1805 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1806 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1807 return allocated_addr; 1808 1809 case eLazyBoolNo: 1810 // Call mmap() to create memory in the inferior.. 1811 unsigned prot = 0; 1812 if (permissions & lldb::ePermissionsReadable) 1813 prot |= eMmapProtRead; 1814 if (permissions & lldb::ePermissionsWritable) 1815 prot |= eMmapProtWrite; 1816 if (permissions & lldb::ePermissionsExecutable) 1817 prot |= eMmapProtExec; 1818 1819 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 1820 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 1821 m_addr_to_mmap_size[allocated_addr] = size; 1822 else 1823 allocated_addr = LLDB_INVALID_ADDRESS; 1824 break; 1825 } 1826 1827 if (allocated_addr == LLDB_INVALID_ADDRESS) 1828 error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); 1829 else 1830 error.Clear(); 1831 return allocated_addr; 1832 } 1833 1834 Error 1835 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 1836 MemoryRegionInfo ®ion_info) 1837 { 1838 1839 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 1840 return error; 1841 } 1842 1843 Error 1844 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 1845 { 1846 Error error; 1847 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1848 1849 switch (supported) 1850 { 1851 case eLazyBoolCalculate: 1852 // We should never be deallocating memory without allocating memory 1853 // first so we should never get eLazyBoolCalculate 1854 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 1855 break; 1856 1857 case eLazyBoolYes: 1858 if (!m_gdb_comm.DeallocateMemory (addr)) 1859 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1860 break; 1861 1862 case eLazyBoolNo: 1863 // Call munmap() to deallocate memory in the inferior.. 1864 { 1865 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 1866 if (pos != m_addr_to_mmap_size.end() && 1867 InferiorCallMunmap(this, addr, pos->second)) 1868 m_addr_to_mmap_size.erase (pos); 1869 else 1870 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1871 } 1872 break; 1873 } 1874 1875 return error; 1876 } 1877 1878 1879 //------------------------------------------------------------------ 1880 // Process STDIO 1881 //------------------------------------------------------------------ 1882 size_t 1883 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 1884 { 1885 if (m_stdio_communication.IsConnected()) 1886 { 1887 ConnectionStatus status; 1888 m_stdio_communication.Write(src, src_len, status, NULL); 1889 } 1890 return 0; 1891 } 1892 1893 Error 1894 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 1895 { 1896 Error error; 1897 assert (bp_site != NULL); 1898 1899 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1900 user_id_t site_id = bp_site->GetID(); 1901 const addr_t addr = bp_site->GetLoadAddress(); 1902 if (log) 1903 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 1904 1905 if (bp_site->IsEnabled()) 1906 { 1907 if (log) 1908 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 1909 return error; 1910 } 1911 else 1912 { 1913 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1914 1915 if (bp_site->HardwarePreferred()) 1916 { 1917 // Try and set hardware breakpoint, and if that fails, fall through 1918 // and set a software breakpoint? 1919 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 1920 { 1921 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 1922 { 1923 bp_site->SetEnabled(true); 1924 bp_site->SetType (BreakpointSite::eHardware); 1925 return error; 1926 } 1927 } 1928 } 1929 1930 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 1931 { 1932 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 1933 { 1934 bp_site->SetEnabled(true); 1935 bp_site->SetType (BreakpointSite::eExternal); 1936 return error; 1937 } 1938 } 1939 1940 return EnableSoftwareBreakpoint (bp_site); 1941 } 1942 1943 if (log) 1944 { 1945 const char *err_string = error.AsCString(); 1946 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 1947 bp_site->GetLoadAddress(), 1948 err_string ? err_string : "NULL"); 1949 } 1950 // We shouldn't reach here on a successful breakpoint enable... 1951 if (error.Success()) 1952 error.SetErrorToGenericError(); 1953 return error; 1954 } 1955 1956 Error 1957 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 1958 { 1959 Error error; 1960 assert (bp_site != NULL); 1961 addr_t addr = bp_site->GetLoadAddress(); 1962 user_id_t site_id = bp_site->GetID(); 1963 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1964 if (log) 1965 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 1966 1967 if (bp_site->IsEnabled()) 1968 { 1969 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1970 1971 BreakpointSite::Type bp_type = bp_site->GetType(); 1972 switch (bp_type) 1973 { 1974 case BreakpointSite::eSoftware: 1975 error = DisableSoftwareBreakpoint (bp_site); 1976 break; 1977 1978 case BreakpointSite::eHardware: 1979 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 1980 error.SetErrorToGenericError(); 1981 break; 1982 1983 case BreakpointSite::eExternal: 1984 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 1985 error.SetErrorToGenericError(); 1986 break; 1987 } 1988 if (error.Success()) 1989 bp_site->SetEnabled(false); 1990 } 1991 else 1992 { 1993 if (log) 1994 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 1995 return error; 1996 } 1997 1998 if (error.Success()) 1999 error.SetErrorToGenericError(); 2000 return error; 2001 } 2002 2003 // Pre-requisite: wp != NULL. 2004 static GDBStoppointType 2005 GetGDBStoppointType (Watchpoint *wp) 2006 { 2007 assert(wp); 2008 bool watch_read = wp->WatchpointRead(); 2009 bool watch_write = wp->WatchpointWrite(); 2010 2011 // watch_read and watch_write cannot both be false. 2012 assert(watch_read || watch_write); 2013 if (watch_read && watch_write) 2014 return eWatchpointReadWrite; 2015 else if (watch_read) 2016 return eWatchpointRead; 2017 else // Must be watch_write, then. 2018 return eWatchpointWrite; 2019 } 2020 2021 Error 2022 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 2023 { 2024 Error error; 2025 if (wp) 2026 { 2027 user_id_t watchID = wp->GetID(); 2028 addr_t addr = wp->GetLoadAddress(); 2029 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2030 if (log) 2031 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 2032 if (wp->IsEnabled()) 2033 { 2034 if (log) 2035 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 2036 return error; 2037 } 2038 2039 GDBStoppointType type = GetGDBStoppointType(wp); 2040 // Pass down an appropriate z/Z packet... 2041 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2042 { 2043 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2044 { 2045 wp->SetEnabled(true); 2046 return error; 2047 } 2048 else 2049 error.SetErrorString("sending gdb watchpoint packet failed"); 2050 } 2051 else 2052 error.SetErrorString("watchpoints not supported"); 2053 } 2054 else 2055 { 2056 error.SetErrorString("Watchpoint argument was NULL."); 2057 } 2058 if (error.Success()) 2059 error.SetErrorToGenericError(); 2060 return error; 2061 } 2062 2063 Error 2064 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 2065 { 2066 Error error; 2067 if (wp) 2068 { 2069 user_id_t watchID = wp->GetID(); 2070 2071 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2072 2073 addr_t addr = wp->GetLoadAddress(); 2074 if (log) 2075 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 2076 2077 if (!wp->IsEnabled()) 2078 { 2079 if (log) 2080 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2081 return error; 2082 } 2083 2084 if (wp->IsHardware()) 2085 { 2086 GDBStoppointType type = GetGDBStoppointType(wp); 2087 // Pass down an appropriate z/Z packet... 2088 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2089 { 2090 wp->SetEnabled(false); 2091 return error; 2092 } 2093 else 2094 error.SetErrorString("sending gdb watchpoint packet failed"); 2095 } 2096 // TODO: clear software watchpoints if we implement them 2097 } 2098 else 2099 { 2100 error.SetErrorString("Watchpoint argument was NULL."); 2101 } 2102 if (error.Success()) 2103 error.SetErrorToGenericError(); 2104 return error; 2105 } 2106 2107 void 2108 ProcessGDBRemote::Clear() 2109 { 2110 m_flags = 0; 2111 m_thread_list.Clear(); 2112 } 2113 2114 Error 2115 ProcessGDBRemote::DoSignal (int signo) 2116 { 2117 Error error; 2118 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2119 if (log) 2120 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2121 2122 if (!m_gdb_comm.SendAsyncSignal (signo)) 2123 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2124 return error; 2125 } 2126 2127 Error 2128 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2129 { 2130 ProcessLaunchInfo launch_info; 2131 return StartDebugserverProcess(debugserver_url, launch_info); 2132 } 2133 2134 Error 2135 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2136 { 2137 Error error; 2138 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2139 { 2140 // If we locate debugserver, keep that located version around 2141 static FileSpec g_debugserver_file_spec; 2142 2143 ProcessLaunchInfo debugserver_launch_info; 2144 char debugserver_path[PATH_MAX]; 2145 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2146 2147 // Always check to see if we have an environment override for the path 2148 // to the debugserver to use and use it if we do. 2149 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2150 if (env_debugserver_path) 2151 debugserver_file_spec.SetFile (env_debugserver_path, false); 2152 else 2153 debugserver_file_spec = g_debugserver_file_spec; 2154 bool debugserver_exists = debugserver_file_spec.Exists(); 2155 if (!debugserver_exists) 2156 { 2157 // The debugserver binary is in the LLDB.framework/Resources 2158 // directory. 2159 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2160 { 2161 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2162 debugserver_exists = debugserver_file_spec.Exists(); 2163 if (debugserver_exists) 2164 { 2165 g_debugserver_file_spec = debugserver_file_spec; 2166 } 2167 else 2168 { 2169 g_debugserver_file_spec.Clear(); 2170 debugserver_file_spec.Clear(); 2171 } 2172 } 2173 } 2174 2175 if (debugserver_exists) 2176 { 2177 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2178 2179 m_stdio_communication.Clear(); 2180 2181 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2182 2183 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2184 char arg_cstr[PATH_MAX]; 2185 2186 // Start args with "debugserver /file/path -r --" 2187 debugserver_args.AppendArgument(debugserver_path); 2188 debugserver_args.AppendArgument(debugserver_url); 2189 // use native registers, not the GDB registers 2190 debugserver_args.AppendArgument("--native-regs"); 2191 // make debugserver run in its own session so signals generated by 2192 // special terminal key sequences (^C) don't affect debugserver 2193 debugserver_args.AppendArgument("--setsid"); 2194 2195 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2196 if (env_debugserver_log_file) 2197 { 2198 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2199 debugserver_args.AppendArgument(arg_cstr); 2200 } 2201 2202 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2203 if (env_debugserver_log_flags) 2204 { 2205 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2206 debugserver_args.AppendArgument(arg_cstr); 2207 } 2208 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2209 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2210 2211 // We currently send down all arguments, attach pids, or attach 2212 // process names in dedicated GDB server packets, so we don't need 2213 // to pass them as arguments. This is currently because of all the 2214 // things we need to setup prior to launching: the environment, 2215 // current working dir, file actions, etc. 2216 #if 0 2217 // Now append the program arguments 2218 if (inferior_argv) 2219 { 2220 // Terminate the debugserver args so we can now append the inferior args 2221 debugserver_args.AppendArgument("--"); 2222 2223 for (int i = 0; inferior_argv[i] != NULL; ++i) 2224 debugserver_args.AppendArgument (inferior_argv[i]); 2225 } 2226 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2227 { 2228 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2229 debugserver_args.AppendArgument (arg_cstr); 2230 } 2231 else if (attach_name && attach_name[0]) 2232 { 2233 if (wait_for_launch) 2234 debugserver_args.AppendArgument ("--waitfor"); 2235 else 2236 debugserver_args.AppendArgument ("--attach"); 2237 debugserver_args.AppendArgument (attach_name); 2238 } 2239 #endif 2240 2241 ProcessLaunchInfo::FileAction file_action; 2242 2243 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2244 // to "/dev/null" if we run into any problems. 2245 file_action.Close (STDIN_FILENO); 2246 debugserver_launch_info.AppendFileAction (file_action); 2247 file_action.Close (STDOUT_FILENO); 2248 debugserver_launch_info.AppendFileAction (file_action); 2249 file_action.Close (STDERR_FILENO); 2250 debugserver_launch_info.AppendFileAction (file_action); 2251 2252 if (log) 2253 { 2254 StreamString strm; 2255 debugserver_args.Dump (&strm); 2256 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2257 } 2258 2259 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2260 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2261 2262 error = Host::LaunchProcess(debugserver_launch_info); 2263 2264 if (error.Success ()) 2265 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2266 else 2267 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2268 2269 if (error.Fail() || log) 2270 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%llu, path='%s'", m_debugserver_pid, debugserver_path); 2271 } 2272 else 2273 { 2274 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2275 } 2276 2277 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2278 StartAsyncThread (); 2279 } 2280 return error; 2281 } 2282 2283 bool 2284 ProcessGDBRemote::MonitorDebugserverProcess 2285 ( 2286 void *callback_baton, 2287 lldb::pid_t debugserver_pid, 2288 bool exited, // True if the process did exit 2289 int signo, // Zero for no signal 2290 int exit_status // Exit value of process if signal is zero 2291 ) 2292 { 2293 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2294 // and might not exist anymore, so we need to carefully try to get the 2295 // target for this process first since we have a race condition when 2296 // we are done running between getting the notice that the inferior 2297 // process has died and the debugserver that was debugging this process. 2298 // In our test suite, we are also continually running process after 2299 // process, so we must be very careful to make sure: 2300 // 1 - process object hasn't been deleted already 2301 // 2 - that a new process object hasn't been recreated in its place 2302 2303 // "debugserver_pid" argument passed in is the process ID for 2304 // debugserver that we are tracking... 2305 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2306 2307 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2308 2309 // Get a shared pointer to the target that has a matching process pointer. 2310 // This target could be gone, or the target could already have a new process 2311 // object inside of it 2312 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2313 2314 if (log) 2315 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%llu, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2316 2317 if (target_sp) 2318 { 2319 // We found a process in a target that matches, but another thread 2320 // might be in the process of launching a new process that will 2321 // soon replace it, so get a shared pointer to the process so we 2322 // can keep it alive. 2323 ProcessSP process_sp (target_sp->GetProcessSP()); 2324 // Now we have a shared pointer to the process that can't go away on us 2325 // so we now make sure it was the same as the one passed in, and also make 2326 // sure that our previous "process *" didn't get deleted and have a new 2327 // "process *" created in its place with the same pointer. To verify this 2328 // we make sure the process has our debugserver process ID. If we pass all 2329 // of these tests, then we are sure that this process is the one we were 2330 // looking for. 2331 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2332 { 2333 // Sleep for a half a second to make sure our inferior process has 2334 // time to set its exit status before we set it incorrectly when 2335 // both the debugserver and the inferior process shut down. 2336 usleep (500000); 2337 // If our process hasn't yet exited, debugserver might have died. 2338 // If the process did exit, the we are reaping it. 2339 const StateType state = process->GetState(); 2340 2341 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2342 state != eStateInvalid && 2343 state != eStateUnloaded && 2344 state != eStateExited && 2345 state != eStateDetached) 2346 { 2347 char error_str[1024]; 2348 if (signo) 2349 { 2350 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2351 if (signal_cstr) 2352 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2353 else 2354 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2355 } 2356 else 2357 { 2358 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2359 } 2360 2361 process->SetExitStatus (-1, error_str); 2362 } 2363 // Debugserver has exited we need to let our ProcessGDBRemote 2364 // know that it no longer has a debugserver instance 2365 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2366 } 2367 } 2368 return true; 2369 } 2370 2371 void 2372 ProcessGDBRemote::KillDebugserverProcess () 2373 { 2374 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2375 { 2376 ::kill (m_debugserver_pid, SIGINT); 2377 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2378 } 2379 } 2380 2381 void 2382 ProcessGDBRemote::Initialize() 2383 { 2384 static bool g_initialized = false; 2385 2386 if (g_initialized == false) 2387 { 2388 g_initialized = true; 2389 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2390 GetPluginDescriptionStatic(), 2391 CreateInstance); 2392 2393 Log::Callbacks log_callbacks = { 2394 ProcessGDBRemoteLog::DisableLog, 2395 ProcessGDBRemoteLog::EnableLog, 2396 ProcessGDBRemoteLog::ListLogCategories 2397 }; 2398 2399 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2400 } 2401 } 2402 2403 bool 2404 ProcessGDBRemote::StartAsyncThread () 2405 { 2406 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2407 2408 if (log) 2409 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2410 2411 // Create a thread that watches our internal state and controls which 2412 // events make it to clients (into the DCProcess event queue). 2413 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2414 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2415 } 2416 2417 void 2418 ProcessGDBRemote::StopAsyncThread () 2419 { 2420 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2421 2422 if (log) 2423 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2424 2425 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2426 2427 // This will shut down the async thread. 2428 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2429 2430 // Stop the stdio thread 2431 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2432 { 2433 Host::ThreadJoin (m_async_thread, NULL, NULL); 2434 } 2435 } 2436 2437 2438 void * 2439 ProcessGDBRemote::AsyncThread (void *arg) 2440 { 2441 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2442 2443 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2444 if (log) 2445 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2446 2447 Listener listener ("ProcessGDBRemote::AsyncThread"); 2448 EventSP event_sp; 2449 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2450 eBroadcastBitAsyncThreadShouldExit; 2451 2452 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2453 { 2454 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2455 2456 bool done = false; 2457 while (!done) 2458 { 2459 if (log) 2460 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2461 if (listener.WaitForEvent (NULL, event_sp)) 2462 { 2463 const uint32_t event_type = event_sp->GetType(); 2464 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2465 { 2466 if (log) 2467 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2468 2469 switch (event_type) 2470 { 2471 case eBroadcastBitAsyncContinue: 2472 { 2473 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2474 2475 if (continue_packet) 2476 { 2477 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2478 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2479 if (log) 2480 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2481 2482 if (::strstr (continue_cstr, "vAttach") == NULL) 2483 process->SetPrivateState(eStateRunning); 2484 StringExtractorGDBRemote response; 2485 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2486 2487 switch (stop_state) 2488 { 2489 case eStateStopped: 2490 case eStateCrashed: 2491 case eStateSuspended: 2492 process->SetLastStopPacket (response); 2493 process->SetPrivateState (stop_state); 2494 break; 2495 2496 case eStateExited: 2497 process->SetLastStopPacket (response); 2498 process->ClearThreadIDList(); 2499 response.SetFilePos(1); 2500 process->SetExitStatus(response.GetHexU8(), NULL); 2501 done = true; 2502 break; 2503 2504 case eStateInvalid: 2505 process->SetExitStatus(-1, "lost connection"); 2506 break; 2507 2508 default: 2509 process->SetPrivateState (stop_state); 2510 break; 2511 } 2512 } 2513 } 2514 break; 2515 2516 case eBroadcastBitAsyncThreadShouldExit: 2517 if (log) 2518 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2519 done = true; 2520 break; 2521 2522 default: 2523 if (log) 2524 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2525 done = true; 2526 break; 2527 } 2528 } 2529 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2530 { 2531 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2532 { 2533 process->SetExitStatus (-1, "lost connection"); 2534 done = true; 2535 } 2536 } 2537 } 2538 else 2539 { 2540 if (log) 2541 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2542 done = true; 2543 } 2544 } 2545 } 2546 2547 if (log) 2548 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2549 2550 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2551 return NULL; 2552 } 2553 2554 const char * 2555 ProcessGDBRemote::GetDispatchQueueNameForThread 2556 ( 2557 addr_t thread_dispatch_qaddr, 2558 std::string &dispatch_queue_name 2559 ) 2560 { 2561 dispatch_queue_name.clear(); 2562 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2563 { 2564 // Cache the dispatch_queue_offsets_addr value so we don't always have 2565 // to look it up 2566 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2567 { 2568 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2569 const Symbol *dispatch_queue_offsets_symbol = NULL; 2570 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2571 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2572 if (module_sp) 2573 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2574 2575 if (dispatch_queue_offsets_symbol == NULL) 2576 { 2577 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2578 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2579 if (module_sp) 2580 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2581 } 2582 if (dispatch_queue_offsets_symbol) 2583 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2584 2585 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2586 return NULL; 2587 } 2588 2589 uint8_t memory_buffer[8]; 2590 DataExtractor data (memory_buffer, 2591 sizeof(memory_buffer), 2592 m_target.GetArchitecture().GetByteOrder(), 2593 m_target.GetArchitecture().GetAddressByteSize()); 2594 2595 // Excerpt from src/queue_private.h 2596 struct dispatch_queue_offsets_s 2597 { 2598 uint16_t dqo_version; 2599 uint16_t dqo_label; 2600 uint16_t dqo_label_size; 2601 } dispatch_queue_offsets; 2602 2603 2604 Error error; 2605 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2606 { 2607 uint32_t data_offset = 0; 2608 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2609 { 2610 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2611 { 2612 data_offset = 0; 2613 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2614 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2615 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2616 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2617 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2618 dispatch_queue_name.erase (bytes_read); 2619 } 2620 } 2621 } 2622 } 2623 if (dispatch_queue_name.empty()) 2624 return NULL; 2625 return dispatch_queue_name.c_str(); 2626 } 2627 2628 //uint32_t 2629 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2630 //{ 2631 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2632 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2633 // if (m_local_debugserver) 2634 // { 2635 // return Host::ListProcessesMatchingName (name, matches, pids); 2636 // } 2637 // else 2638 // { 2639 // // FIXME: Implement talking to the remote debugserver. 2640 // return 0; 2641 // } 2642 // 2643 //} 2644 // 2645 bool 2646 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2647 lldb_private::StoppointCallbackContext *context, 2648 lldb::user_id_t break_id, 2649 lldb::user_id_t break_loc_id) 2650 { 2651 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2652 // run so I can stop it if that's what I want to do. 2653 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2654 if (log) 2655 log->Printf("Hit New Thread Notification breakpoint."); 2656 return false; 2657 } 2658 2659 2660 bool 2661 ProcessGDBRemote::StartNoticingNewThreads() 2662 { 2663 static const char *bp_names[] = 2664 { 2665 "start_wqthread", 2666 "_pthread_wqthread", 2667 "_pthread_start", 2668 NULL 2669 }; 2670 2671 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2672 size_t num_bps = m_thread_observation_bps.size(); 2673 if (num_bps != 0) 2674 { 2675 for (int i = 0; i < num_bps; i++) 2676 { 2677 lldb::BreakpointSP break_sp = m_target.GetBreakpointByID(m_thread_observation_bps[i]); 2678 if (break_sp) 2679 { 2680 if (log && log->GetVerbose()) 2681 log->Printf("Enabled noticing new thread breakpoint."); 2682 break_sp->SetEnabled(true); 2683 } 2684 } 2685 } 2686 else 2687 { 2688 for (int i = 0; bp_names[i] != NULL; i++) 2689 { 2690 Breakpoint *breakpoint = m_target.CreateBreakpoint (NULL, NULL, bp_names[i], eFunctionNameTypeFull, true).get(); 2691 if (breakpoint) 2692 { 2693 if (log && log->GetVerbose()) 2694 log->Printf("Successfully created new thread notification breakpoint at \"%s\".", bp_names[i]); 2695 m_thread_observation_bps.push_back(breakpoint->GetID()); 2696 breakpoint->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2697 } 2698 else 2699 { 2700 if (log) 2701 log->Printf("Failed to create new thread notification breakpoint."); 2702 return false; 2703 } 2704 } 2705 } 2706 2707 return true; 2708 } 2709 2710 bool 2711 ProcessGDBRemote::StopNoticingNewThreads() 2712 { 2713 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2714 if (log && log->GetVerbose()) 2715 log->Printf ("Disabling new thread notification breakpoint."); 2716 size_t num_bps = m_thread_observation_bps.size(); 2717 if (num_bps != 0) 2718 { 2719 for (int i = 0; i < num_bps; i++) 2720 { 2721 2722 lldb::BreakpointSP break_sp = m_target.GetBreakpointByID(m_thread_observation_bps[i]); 2723 if (break_sp) 2724 { 2725 break_sp->SetEnabled(false); 2726 } 2727 } 2728 } 2729 return true; 2730 } 2731 2732 2733