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/StreamString.h" 36 #include "lldb/Core/Timer.h" 37 #include "lldb/Core/Value.h" 38 #include "lldb/Host/TimeValue.h" 39 #include "lldb/Symbol/ObjectFile.h" 40 #include "lldb/Target/DynamicLoader.h" 41 #include "lldb/Target/Target.h" 42 #include "lldb/Target/TargetList.h" 43 #include "lldb/Target/ThreadPlanCallFunction.h" 44 #include "lldb/Utility/PseudoTerminal.h" 45 46 // Project includes 47 #include "lldb/Host/Host.h" 48 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 49 #include "Utility/StringExtractorGDBRemote.h" 50 #include "GDBRemoteRegisterContext.h" 51 #include "ProcessGDBRemote.h" 52 #include "ProcessGDBRemoteLog.h" 53 #include "ThreadGDBRemote.h" 54 #include "StopInfoMachException.h" 55 56 57 58 #define DEBUGSERVER_BASENAME "debugserver" 59 using namespace lldb; 60 using namespace lldb_private; 61 62 static bool rand_initialized = false; 63 64 static inline uint16_t 65 get_random_port () 66 { 67 if (!rand_initialized) 68 { 69 time_t seed = time(NULL); 70 71 rand_initialized = true; 72 srand(seed); 73 } 74 return (rand() % (UINT16_MAX - 1000u)) + 1000u; 75 } 76 77 78 const char * 79 ProcessGDBRemote::GetPluginNameStatic() 80 { 81 return "gdb-remote"; 82 } 83 84 const char * 85 ProcessGDBRemote::GetPluginDescriptionStatic() 86 { 87 return "GDB Remote protocol based debugging plug-in."; 88 } 89 90 void 91 ProcessGDBRemote::Terminate() 92 { 93 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 94 } 95 96 97 Process* 98 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener) 99 { 100 return new ProcessGDBRemote (target, listener); 101 } 102 103 bool 104 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 105 { 106 if (plugin_specified_by_name) 107 return true; 108 109 // For now we are just making sure the file exists for a given module 110 Module *exe_module = target.GetExecutableModulePointer(); 111 if (exe_module) 112 return exe_module->GetFileSpec().Exists(); 113 // However, if there is no executable module, we return true since we might be preparing to attach. 114 return true; 115 } 116 117 //---------------------------------------------------------------------- 118 // ProcessGDBRemote constructor 119 //---------------------------------------------------------------------- 120 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 121 Process (target, listener), 122 m_flags (0), 123 m_gdb_comm(false), 124 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 125 m_last_stop_packet (), 126 m_register_info (), 127 m_async_broadcaster ("lldb.process.gdb-remote.async-broadcaster"), 128 m_async_thread (LLDB_INVALID_HOST_THREAD), 129 m_continue_c_tids (), 130 m_continue_C_tids (), 131 m_continue_s_tids (), 132 m_continue_S_tids (), 133 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 134 m_max_memory_size (512), 135 m_waiting_for_attach (false), 136 m_thread_observation_bps() 137 { 138 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 139 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 140 } 141 142 //---------------------------------------------------------------------- 143 // Destructor 144 //---------------------------------------------------------------------- 145 ProcessGDBRemote::~ProcessGDBRemote() 146 { 147 // m_mach_process.UnregisterNotificationCallbacks (this); 148 Clear(); 149 // We need to call finalize on the process before destroying ourselves 150 // to make sure all of the broadcaster cleanup goes as planned. If we 151 // destruct this class, then Process::~Process() might have problems 152 // trying to fully destroy the broadcaster. 153 Finalize(); 154 } 155 156 //---------------------------------------------------------------------- 157 // PluginInterface 158 //---------------------------------------------------------------------- 159 const char * 160 ProcessGDBRemote::GetPluginName() 161 { 162 return "Process debugging plug-in that uses the GDB remote protocol"; 163 } 164 165 const char * 166 ProcessGDBRemote::GetShortPluginName() 167 { 168 return GetPluginNameStatic(); 169 } 170 171 uint32_t 172 ProcessGDBRemote::GetPluginVersion() 173 { 174 return 1; 175 } 176 177 void 178 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 179 { 180 if (!force && m_register_info.GetNumRegisters() > 0) 181 return; 182 183 char packet[128]; 184 m_register_info.Clear(); 185 uint32_t reg_offset = 0; 186 uint32_t reg_num = 0; 187 StringExtractorGDBRemote::ResponseType response_type; 188 for (response_type = StringExtractorGDBRemote::eResponse; 189 response_type == StringExtractorGDBRemote::eResponse; 190 ++reg_num) 191 { 192 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 193 assert (packet_len < sizeof(packet)); 194 StringExtractorGDBRemote response; 195 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 196 { 197 response_type = response.GetResponseType(); 198 if (response_type == StringExtractorGDBRemote::eResponse) 199 { 200 std::string name; 201 std::string value; 202 ConstString reg_name; 203 ConstString alt_name; 204 ConstString set_name; 205 RegisterInfo reg_info = { NULL, // Name 206 NULL, // Alt name 207 0, // byte size 208 reg_offset, // offset 209 eEncodingUint, // encoding 210 eFormatHex, // formate 211 { 212 LLDB_INVALID_REGNUM, // GCC reg num 213 LLDB_INVALID_REGNUM, // DWARF reg num 214 LLDB_INVALID_REGNUM, // generic reg num 215 reg_num, // GDB reg num 216 reg_num // native register number 217 } 218 }; 219 220 while (response.GetNameColonValue(name, value)) 221 { 222 if (name.compare("name") == 0) 223 { 224 reg_name.SetCString(value.c_str()); 225 } 226 else if (name.compare("alt-name") == 0) 227 { 228 alt_name.SetCString(value.c_str()); 229 } 230 else if (name.compare("bitsize") == 0) 231 { 232 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 233 } 234 else if (name.compare("offset") == 0) 235 { 236 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 237 if (reg_offset != offset) 238 { 239 reg_offset = offset; 240 } 241 } 242 else if (name.compare("encoding") == 0) 243 { 244 if (value.compare("uint") == 0) 245 reg_info.encoding = eEncodingUint; 246 else if (value.compare("sint") == 0) 247 reg_info.encoding = eEncodingSint; 248 else if (value.compare("ieee754") == 0) 249 reg_info.encoding = eEncodingIEEE754; 250 else if (value.compare("vector") == 0) 251 reg_info.encoding = eEncodingVector; 252 } 253 else if (name.compare("format") == 0) 254 { 255 if (value.compare("binary") == 0) 256 reg_info.format = eFormatBinary; 257 else if (value.compare("decimal") == 0) 258 reg_info.format = eFormatDecimal; 259 else if (value.compare("hex") == 0) 260 reg_info.format = eFormatHex; 261 else if (value.compare("float") == 0) 262 reg_info.format = eFormatFloat; 263 else if (value.compare("vector-sint8") == 0) 264 reg_info.format = eFormatVectorOfSInt8; 265 else if (value.compare("vector-uint8") == 0) 266 reg_info.format = eFormatVectorOfUInt8; 267 else if (value.compare("vector-sint16") == 0) 268 reg_info.format = eFormatVectorOfSInt16; 269 else if (value.compare("vector-uint16") == 0) 270 reg_info.format = eFormatVectorOfUInt16; 271 else if (value.compare("vector-sint32") == 0) 272 reg_info.format = eFormatVectorOfSInt32; 273 else if (value.compare("vector-uint32") == 0) 274 reg_info.format = eFormatVectorOfUInt32; 275 else if (value.compare("vector-float32") == 0) 276 reg_info.format = eFormatVectorOfFloat32; 277 else if (value.compare("vector-uint128") == 0) 278 reg_info.format = eFormatVectorOfUInt128; 279 } 280 else if (name.compare("set") == 0) 281 { 282 set_name.SetCString(value.c_str()); 283 } 284 else if (name.compare("gcc") == 0) 285 { 286 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 287 } 288 else if (name.compare("dwarf") == 0) 289 { 290 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 291 } 292 else if (name.compare("generic") == 0) 293 { 294 if (value.compare("pc") == 0) 295 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; 296 else if (value.compare("sp") == 0) 297 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; 298 else if (value.compare("fp") == 0) 299 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; 300 else if (value.compare("ra") == 0) 301 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; 302 else if (value.compare("flags") == 0) 303 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS; 304 else if (value.find("arg") == 0) 305 { 306 if (value.size() == 4) 307 { 308 switch (value[3]) 309 { 310 case '1': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG1; break; 311 case '2': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG2; break; 312 case '3': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG3; break; 313 case '4': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG4; break; 314 case '5': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG5; break; 315 case '6': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG6; break; 316 case '7': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG7; break; 317 case '8': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG8; break; 318 } 319 } 320 } 321 } 322 } 323 324 reg_info.byte_offset = reg_offset; 325 assert (reg_info.byte_size != 0); 326 reg_offset += reg_info.byte_size; 327 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 328 } 329 } 330 else 331 { 332 response_type = StringExtractorGDBRemote::eError; 333 break; 334 } 335 } 336 337 if (reg_num == 0) 338 { 339 // We didn't get anything. See if we are debugging ARM and fill with 340 // a hard coded register set until we can get an updated debugserver 341 // down on the devices. 342 343 if (!GetTarget().GetArchitecture().IsValid() 344 && m_gdb_comm.GetHostArchitecture().IsValid() 345 && m_gdb_comm.GetHostArchitecture().GetMachine() == llvm::Triple::arm 346 && m_gdb_comm.GetHostArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) 347 { 348 m_register_info.HardcodeARMRegisters(); 349 } 350 else if (GetTarget().GetArchitecture().GetMachine() == llvm::Triple::arm) 351 { 352 m_register_info.HardcodeARMRegisters(); 353 } 354 } 355 m_register_info.Finalize (); 356 } 357 358 Error 359 ProcessGDBRemote::WillLaunch (Module* module) 360 { 361 return WillLaunchOrAttach (); 362 } 363 364 Error 365 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 366 { 367 return WillLaunchOrAttach (); 368 } 369 370 Error 371 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 372 { 373 return WillLaunchOrAttach (); 374 } 375 376 Error 377 ProcessGDBRemote::DoConnectRemote (const char *remote_url) 378 { 379 Error error (WillLaunchOrAttach ()); 380 381 if (error.Fail()) 382 return error; 383 384 error = ConnectToDebugserver (remote_url); 385 386 if (error.Fail()) 387 return error; 388 StartAsyncThread (); 389 390 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 391 if (pid == LLDB_INVALID_PROCESS_ID) 392 { 393 // We don't have a valid process ID, so note that we are connected 394 // and could now request to launch or attach, or get remote process 395 // listings... 396 SetPrivateState (eStateConnected); 397 } 398 else 399 { 400 // We have a valid process 401 SetID (pid); 402 GetThreadList(); 403 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 404 { 405 const StateType state = SetThreadStopInfo (m_last_stop_packet); 406 if (state == eStateStopped) 407 { 408 SetPrivateState (state); 409 } 410 else 411 error.SetErrorStringWithFormat ("Process %i was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 412 } 413 else 414 error.SetErrorStringWithFormat ("Process %i was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 415 } 416 return error; 417 } 418 419 Error 420 ProcessGDBRemote::WillLaunchOrAttach () 421 { 422 Error error; 423 m_stdio_communication.Clear (); 424 return error; 425 } 426 427 //---------------------------------------------------------------------- 428 // Process Control 429 //---------------------------------------------------------------------- 430 Error 431 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 432 { 433 Error error; 434 435 uint32_t launch_flags = launch_info.GetFlags().Get(); 436 const char *stdin_path = NULL; 437 const char *stdout_path = NULL; 438 const char *stderr_path = NULL; 439 const char *working_dir = launch_info.GetWorkingDirectory(); 440 441 const ProcessLaunchInfo::FileAction *file_action; 442 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 443 if (file_action) 444 { 445 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 446 stdin_path = file_action->GetPath(); 447 } 448 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 449 if (file_action) 450 { 451 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 452 stdout_path = file_action->GetPath(); 453 } 454 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 455 if (file_action) 456 { 457 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 458 stderr_path = file_action->GetPath(); 459 } 460 461 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 462 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 463 // ::LogSetLogFile ("/dev/stdout"); 464 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 465 466 ObjectFile * object_file = exe_module->GetObjectFile(); 467 if (object_file) 468 { 469 char host_port[128]; 470 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 471 char connect_url[128]; 472 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 473 474 // Make sure we aren't already connected? 475 if (!m_gdb_comm.IsConnected()) 476 { 477 error = StartDebugserverProcess (host_port); 478 if (error.Fail()) 479 { 480 if (log) 481 log->Printf("failed to start debugserver process: %s", error.AsCString()); 482 return error; 483 } 484 485 error = ConnectToDebugserver (connect_url); 486 } 487 488 if (error.Success()) 489 { 490 lldb_utility::PseudoTerminal pty; 491 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 492 493 // If the debugserver is local and we aren't disabling STDIO, lets use 494 // a pseudo terminal to instead of relying on the 'O' packets for stdio 495 // since 'O' packets can really slow down debugging if the inferior 496 // does a lot of output. 497 PlatformSP platform_sp (m_target.GetPlatform()); 498 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 499 { 500 const char *slave_name = NULL; 501 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 502 { 503 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 504 slave_name = pty.GetSlaveName (NULL, 0); 505 } 506 if (stdin_path == NULL) 507 stdin_path = slave_name; 508 509 if (stdout_path == NULL) 510 stdout_path = slave_name; 511 512 if (stderr_path == NULL) 513 stderr_path = slave_name; 514 } 515 516 // Set STDIN to /dev/null if we want STDIO disabled or if either 517 // STDOUT or STDERR have been set to something and STDIN hasn't 518 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 519 stdin_path = "/dev/null"; 520 521 // Set STDOUT to /dev/null if we want STDIO disabled or if either 522 // STDIN or STDERR have been set to something and STDOUT hasn't 523 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 524 stdout_path = "/dev/null"; 525 526 // Set STDERR to /dev/null if we want STDIO disabled or if either 527 // STDIN or STDOUT have been set to something and STDERR hasn't 528 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 529 stderr_path = "/dev/null"; 530 531 if (stdin_path) 532 m_gdb_comm.SetSTDIN (stdin_path); 533 if (stdout_path) 534 m_gdb_comm.SetSTDOUT (stdout_path); 535 if (stderr_path) 536 m_gdb_comm.SetSTDERR (stderr_path); 537 538 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 539 540 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 541 542 if (working_dir && working_dir[0]) 543 { 544 m_gdb_comm.SetWorkingDir (working_dir); 545 } 546 547 // Send the environment and the program + arguments after we connect 548 const Args &environment = launch_info.GetEnvironmentEntries(); 549 if (environment.GetArgumentCount()) 550 { 551 size_t num_environment_entries = environment.GetArgumentCount(); 552 for (size_t i=0; i<num_environment_entries; ++i) 553 { 554 const char *env_entry = environment.GetArgumentAtIndex(i); 555 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 556 break; 557 } 558 } 559 560 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 561 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 562 if (arg_packet_err == 0) 563 { 564 std::string error_str; 565 if (m_gdb_comm.GetLaunchSuccess (error_str)) 566 { 567 SetID (m_gdb_comm.GetCurrentProcessID ()); 568 } 569 else 570 { 571 error.SetErrorString (error_str.c_str()); 572 } 573 } 574 else 575 { 576 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 577 } 578 579 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 580 581 if (GetID() == LLDB_INVALID_PROCESS_ID) 582 { 583 if (log) 584 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 585 KillDebugserverProcess (); 586 return error; 587 } 588 589 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 590 { 591 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 592 593 if (!disable_stdio) 594 { 595 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 596 SetUpProcessInputReader (pty.ReleaseMasterFileDescriptor()); 597 } 598 } 599 } 600 else 601 { 602 if (log) 603 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 604 } 605 } 606 else 607 { 608 // Set our user ID to an invalid process ID. 609 SetID(LLDB_INVALID_PROCESS_ID); 610 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 611 exe_module->GetFileSpec().GetFilename().AsCString(), 612 exe_module->GetArchitecture().GetArchitectureName()); 613 } 614 return error; 615 616 } 617 618 619 Error 620 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 621 { 622 Error error; 623 // Sleep and wait a bit for debugserver to start to listen... 624 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 625 if (conn_ap.get()) 626 { 627 const uint32_t max_retry_count = 50; 628 uint32_t retry_count = 0; 629 while (!m_gdb_comm.IsConnected()) 630 { 631 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 632 { 633 m_gdb_comm.SetConnection (conn_ap.release()); 634 break; 635 } 636 retry_count++; 637 638 if (retry_count >= max_retry_count) 639 break; 640 641 usleep (100000); 642 } 643 } 644 645 if (!m_gdb_comm.IsConnected()) 646 { 647 if (error.Success()) 648 error.SetErrorString("not connected to remote gdb server"); 649 return error; 650 } 651 652 // We always seem to be able to open a connection to a local port 653 // so we need to make sure we can then send data to it. If we can't 654 // then we aren't actually connected to anything, so try and do the 655 // handshake with the remote GDB server and make sure that goes 656 // alright. 657 if (!m_gdb_comm.HandshakeWithServer (NULL)) 658 { 659 m_gdb_comm.Disconnect(); 660 if (error.Success()) 661 error.SetErrorString("not connected to remote gdb server"); 662 return error; 663 } 664 m_gdb_comm.ResetDiscoverableSettings(); 665 m_gdb_comm.QueryNoAckModeSupported (); 666 m_gdb_comm.GetThreadSuffixSupported (); 667 m_gdb_comm.GetHostInfo (); 668 m_gdb_comm.GetVContSupported ('c'); 669 return error; 670 } 671 672 void 673 ProcessGDBRemote::DidLaunchOrAttach () 674 { 675 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 676 if (log) 677 log->Printf ("ProcessGDBRemote::DidLaunch()"); 678 if (GetID() != LLDB_INVALID_PROCESS_ID) 679 { 680 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 681 682 BuildDynamicRegisterInfo (false); 683 684 // See if the GDB server supports the qHostInfo information 685 686 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 687 if (gdb_remote_arch.IsValid()) 688 { 689 ArchSpec &target_arch = GetTarget().GetArchitecture(); 690 691 if (target_arch.IsValid()) 692 { 693 // If the remote host is ARM and we have apple as the vendor, then 694 // ARM executables and shared libraries can have mixed ARM architectures. 695 // You can have an armv6 executable, and if the host is armv7, then the 696 // system will load the best possible architecture for all shared libraries 697 // it has, so we really need to take the remote host architecture as our 698 // defacto architecture in this case. 699 700 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 701 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 702 { 703 target_arch = gdb_remote_arch; 704 } 705 else 706 { 707 // Fill in what is missing in the triple 708 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 709 llvm::Triple &target_triple = target_arch.GetTriple(); 710 if (target_triple.getVendorName().size() == 0) 711 { 712 target_triple.setVendor (remote_triple.getVendor()); 713 714 if (target_triple.getOSName().size() == 0) 715 { 716 target_triple.setOS (remote_triple.getOS()); 717 718 if (target_triple.getEnvironmentName().size() == 0) 719 target_triple.setEnvironment (remote_triple.getEnvironment()); 720 } 721 } 722 } 723 } 724 else 725 { 726 // The target doesn't have a valid architecture yet, set it from 727 // the architecture we got from the remote GDB server 728 target_arch = gdb_remote_arch; 729 } 730 } 731 } 732 } 733 734 void 735 ProcessGDBRemote::DidLaunch () 736 { 737 DidLaunchOrAttach (); 738 } 739 740 Error 741 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 742 { 743 Error error; 744 // Clear out and clean up from any current state 745 Clear(); 746 if (attach_pid != LLDB_INVALID_PROCESS_ID) 747 { 748 // Make sure we aren't already connected? 749 if (!m_gdb_comm.IsConnected()) 750 { 751 char host_port[128]; 752 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 753 char connect_url[128]; 754 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 755 756 error = StartDebugserverProcess (host_port); 757 758 if (error.Fail()) 759 { 760 const char *error_string = error.AsCString(); 761 if (error_string == NULL) 762 error_string = "unable to launch " DEBUGSERVER_BASENAME; 763 764 SetExitStatus (-1, error_string); 765 } 766 else 767 { 768 error = ConnectToDebugserver (connect_url); 769 } 770 } 771 772 if (error.Success()) 773 { 774 char packet[64]; 775 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%x", attach_pid); 776 777 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 778 } 779 } 780 return error; 781 } 782 783 size_t 784 ProcessGDBRemote::AttachInputReaderCallback 785 ( 786 void *baton, 787 InputReader *reader, 788 lldb::InputReaderAction notification, 789 const char *bytes, 790 size_t bytes_len 791 ) 792 { 793 if (notification == eInputReaderGotToken) 794 { 795 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 796 if (gdb_process->m_waiting_for_attach) 797 gdb_process->m_waiting_for_attach = false; 798 reader->SetIsDone(true); 799 return 1; 800 } 801 return 0; 802 } 803 804 Error 805 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch) 806 { 807 Error error; 808 // Clear out and clean up from any current state 809 Clear(); 810 811 if (process_name && process_name[0]) 812 { 813 // Make sure we aren't already connected? 814 if (!m_gdb_comm.IsConnected()) 815 { 816 char host_port[128]; 817 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 818 char connect_url[128]; 819 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 820 821 error = StartDebugserverProcess (host_port); 822 if (error.Fail()) 823 { 824 const char *error_string = error.AsCString(); 825 if (error_string == NULL) 826 error_string = "unable to launch " DEBUGSERVER_BASENAME; 827 828 SetExitStatus (-1, error_string); 829 } 830 else 831 { 832 error = ConnectToDebugserver (connect_url); 833 } 834 } 835 836 if (error.Success()) 837 { 838 StreamString packet; 839 840 if (wait_for_launch) 841 packet.PutCString("vAttachWait"); 842 else 843 packet.PutCString("vAttachName"); 844 packet.PutChar(';'); 845 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 846 847 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 848 849 } 850 } 851 return error; 852 } 853 854 855 void 856 ProcessGDBRemote::DidAttach () 857 { 858 DidLaunchOrAttach (); 859 } 860 861 Error 862 ProcessGDBRemote::WillResume () 863 { 864 m_continue_c_tids.clear(); 865 m_continue_C_tids.clear(); 866 m_continue_s_tids.clear(); 867 m_continue_S_tids.clear(); 868 return Error(); 869 } 870 871 Error 872 ProcessGDBRemote::DoResume () 873 { 874 Error error; 875 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 876 if (log) 877 log->Printf ("ProcessGDBRemote::Resume()"); 878 879 Listener listener ("gdb-remote.resume-packet-sent"); 880 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 881 { 882 StreamString continue_packet; 883 bool continue_packet_error = false; 884 if (m_gdb_comm.HasAnyVContSupport ()) 885 { 886 continue_packet.PutCString ("vCont"); 887 888 if (!m_continue_c_tids.empty()) 889 { 890 if (m_gdb_comm.GetVContSupported ('c')) 891 { 892 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) 893 continue_packet.Printf(";c:%4.4x", *t_pos); 894 } 895 else 896 continue_packet_error = true; 897 } 898 899 if (!continue_packet_error && !m_continue_C_tids.empty()) 900 { 901 if (m_gdb_comm.GetVContSupported ('C')) 902 { 903 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) 904 continue_packet.Printf(";C%2.2x:%4.4x", s_pos->second, s_pos->first); 905 } 906 else 907 continue_packet_error = true; 908 } 909 910 if (!continue_packet_error && !m_continue_s_tids.empty()) 911 { 912 if (m_gdb_comm.GetVContSupported ('s')) 913 { 914 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) 915 continue_packet.Printf(";s:%4.4x", *t_pos); 916 } 917 else 918 continue_packet_error = true; 919 } 920 921 if (!continue_packet_error && !m_continue_S_tids.empty()) 922 { 923 if (m_gdb_comm.GetVContSupported ('S')) 924 { 925 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) 926 continue_packet.Printf(";S%2.2x:%4.4x", s_pos->second, s_pos->first); 927 } 928 else 929 continue_packet_error = true; 930 } 931 932 if (continue_packet_error) 933 continue_packet.GetString().clear(); 934 } 935 else 936 continue_packet_error = true; 937 938 if (continue_packet_error) 939 { 940 // Either no vCont support, or we tried to use part of the vCont 941 // packet that wasn't supported by the remote GDB server. 942 // We need to try and make a simple packet that can do our continue 943 const size_t num_threads = GetThreadList().GetSize(); 944 const size_t num_continue_c_tids = m_continue_c_tids.size(); 945 const size_t num_continue_C_tids = m_continue_C_tids.size(); 946 const size_t num_continue_s_tids = m_continue_s_tids.size(); 947 const size_t num_continue_S_tids = m_continue_S_tids.size(); 948 if (num_continue_c_tids > 0) 949 { 950 if (num_continue_c_tids == num_threads) 951 { 952 // All threads are resuming... 953 m_gdb_comm.SetCurrentThreadForRun (-1); 954 continue_packet.PutChar ('c'); 955 continue_packet_error = false; 956 } 957 else if (num_continue_c_tids == 1 && 958 num_continue_C_tids == 0 && 959 num_continue_s_tids == 0 && 960 num_continue_S_tids == 0 ) 961 { 962 // Only one thread is continuing 963 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 964 continue_packet.PutChar ('c'); 965 continue_packet_error = false; 966 } 967 } 968 969 if (continue_packet_error && num_continue_C_tids > 0) 970 { 971 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 972 num_continue_C_tids > 0 && 973 num_continue_s_tids == 0 && 974 num_continue_S_tids == 0 ) 975 { 976 const int continue_signo = m_continue_C_tids.front().second; 977 // Only one thread is continuing 978 if (num_continue_C_tids > 1) 979 { 980 // More that one thread with a signal, yet we don't have 981 // vCont support and we are being asked to resume each 982 // thread with a signal, we need to make sure they are 983 // all the same signal, or we can't issue the continue 984 // accurately with the current support... 985 if (num_continue_C_tids > 1) 986 { 987 continue_packet_error = false; 988 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 989 { 990 if (m_continue_C_tids[i].second != continue_signo) 991 continue_packet_error = true; 992 } 993 } 994 if (!continue_packet_error) 995 m_gdb_comm.SetCurrentThreadForRun (-1); 996 } 997 else 998 { 999 // Set the continue thread ID 1000 continue_packet_error = false; 1001 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1002 } 1003 if (!continue_packet_error) 1004 { 1005 // Add threads continuing with the same signo... 1006 continue_packet.Printf("C%2.2x", continue_signo); 1007 } 1008 } 1009 } 1010 1011 if (continue_packet_error && num_continue_s_tids > 0) 1012 { 1013 if (num_continue_s_tids == num_threads) 1014 { 1015 // All threads are resuming... 1016 m_gdb_comm.SetCurrentThreadForRun (-1); 1017 continue_packet.PutChar ('s'); 1018 continue_packet_error = false; 1019 } 1020 else if (num_continue_c_tids == 0 && 1021 num_continue_C_tids == 0 && 1022 num_continue_s_tids == 1 && 1023 num_continue_S_tids == 0 ) 1024 { 1025 // Only one thread is stepping 1026 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1027 continue_packet.PutChar ('s'); 1028 continue_packet_error = false; 1029 } 1030 } 1031 1032 if (!continue_packet_error && num_continue_S_tids > 0) 1033 { 1034 if (num_continue_S_tids == num_threads) 1035 { 1036 const int step_signo = m_continue_S_tids.front().second; 1037 // Are all threads trying to step with the same signal? 1038 continue_packet_error = false; 1039 if (num_continue_S_tids > 1) 1040 { 1041 for (size_t i=1; i<num_threads; ++i) 1042 { 1043 if (m_continue_S_tids[i].second != step_signo) 1044 continue_packet_error = true; 1045 } 1046 } 1047 if (!continue_packet_error) 1048 { 1049 // Add threads stepping with the same signo... 1050 m_gdb_comm.SetCurrentThreadForRun (-1); 1051 continue_packet.Printf("S%2.2x", step_signo); 1052 } 1053 } 1054 else if (num_continue_c_tids == 0 && 1055 num_continue_C_tids == 0 && 1056 num_continue_s_tids == 0 && 1057 num_continue_S_tids == 1 ) 1058 { 1059 // Only one thread is stepping with signal 1060 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1061 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1062 continue_packet_error = false; 1063 } 1064 } 1065 } 1066 1067 if (continue_packet_error) 1068 { 1069 error.SetErrorString ("can't make continue packet for this resume"); 1070 } 1071 else 1072 { 1073 EventSP event_sp; 1074 TimeValue timeout; 1075 timeout = TimeValue::Now(); 1076 timeout.OffsetWithSeconds (5); 1077 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1078 1079 if (listener.WaitForEvent (&timeout, event_sp) == false) 1080 error.SetErrorString("Resume timed out."); 1081 } 1082 } 1083 1084 return error; 1085 } 1086 1087 uint32_t 1088 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1089 { 1090 // locker will keep a mutex locked until it goes out of scope 1091 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1092 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1093 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1094 // Update the thread list's stop id immediately so we don't recurse into this function. 1095 1096 std::vector<lldb::tid_t> thread_ids; 1097 bool sequence_mutex_unavailable = false; 1098 const size_t num_thread_ids = m_gdb_comm.GetCurrentThreadIDs (thread_ids, sequence_mutex_unavailable); 1099 if (num_thread_ids > 0) 1100 { 1101 for (size_t i=0; i<num_thread_ids; ++i) 1102 { 1103 tid_t tid = thread_ids[i]; 1104 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1105 if (!thread_sp) 1106 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1107 new_thread_list.AddThread(thread_sp); 1108 } 1109 } 1110 1111 if (sequence_mutex_unavailable == false) 1112 SetThreadStopInfo (m_last_stop_packet); 1113 return new_thread_list.GetSize(false); 1114 } 1115 1116 1117 StateType 1118 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1119 { 1120 stop_packet.SetFilePos (0); 1121 const char stop_type = stop_packet.GetChar(); 1122 switch (stop_type) 1123 { 1124 case 'T': 1125 case 'S': 1126 { 1127 if (GetStopID() == 0) 1128 { 1129 // Our first stop, make sure we have a process ID, and also make 1130 // sure we know about our registers 1131 if (GetID() == LLDB_INVALID_PROCESS_ID) 1132 { 1133 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1134 if (pid != LLDB_INVALID_PROCESS_ID) 1135 SetID (pid); 1136 } 1137 BuildDynamicRegisterInfo (true); 1138 } 1139 // Stop with signal and thread info 1140 const uint8_t signo = stop_packet.GetHexU8(); 1141 std::string name; 1142 std::string value; 1143 std::string thread_name; 1144 std::string reason; 1145 std::string description; 1146 uint32_t exc_type = 0; 1147 std::vector<addr_t> exc_data; 1148 uint32_t tid = LLDB_INVALID_THREAD_ID; 1149 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1150 uint32_t exc_data_count = 0; 1151 ThreadSP thread_sp; 1152 1153 while (stop_packet.GetNameColonValue(name, value)) 1154 { 1155 if (name.compare("metype") == 0) 1156 { 1157 // exception type in big endian hex 1158 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1159 } 1160 else if (name.compare("mecount") == 0) 1161 { 1162 // exception count in big endian hex 1163 exc_data_count = Args::StringToUInt32 (value.c_str(), 0, 16); 1164 } 1165 else if (name.compare("medata") == 0) 1166 { 1167 // exception data in big endian hex 1168 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1169 } 1170 else if (name.compare("thread") == 0) 1171 { 1172 // thread in big endian hex 1173 tid = Args::StringToUInt32 (value.c_str(), 0, 16); 1174 // m_thread_list does have its own mutex, but we need to 1175 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1176 // and the m_thread_list.AddThread(...) so it doesn't change on us 1177 Mutex::Locker locker (m_thread_list.GetMutex ()); 1178 thread_sp = m_thread_list.FindThreadByID(tid, false); 1179 if (!thread_sp) 1180 { 1181 // Create the thread if we need to 1182 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1183 m_thread_list.AddThread(thread_sp); 1184 } 1185 } 1186 else if (name.compare("hexname") == 0) 1187 { 1188 StringExtractor name_extractor; 1189 // Swap "value" over into "name_extractor" 1190 name_extractor.GetStringRef().swap(value); 1191 // Now convert the HEX bytes into a string value 1192 name_extractor.GetHexByteString (value); 1193 thread_name.swap (value); 1194 } 1195 else if (name.compare("name") == 0) 1196 { 1197 thread_name.swap (value); 1198 } 1199 else if (name.compare("qaddr") == 0) 1200 { 1201 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1202 } 1203 else if (name.compare("reason") == 0) 1204 { 1205 reason.swap(value); 1206 } 1207 else if (name.compare("description") == 0) 1208 { 1209 StringExtractor desc_extractor; 1210 // Swap "value" over into "name_extractor" 1211 desc_extractor.GetStringRef().swap(value); 1212 // Now convert the HEX bytes into a string value 1213 desc_extractor.GetHexByteString (thread_name); 1214 } 1215 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1216 { 1217 // We have a register number that contains an expedited 1218 // register value. Lets supply this register to our thread 1219 // so it won't have to go and read it. 1220 if (thread_sp) 1221 { 1222 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1223 1224 if (reg != UINT32_MAX) 1225 { 1226 StringExtractor reg_value_extractor; 1227 // Swap "value" over into "reg_value_extractor" 1228 reg_value_extractor.GetStringRef().swap(value); 1229 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1230 { 1231 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1232 name.c_str(), 1233 reg, 1234 reg, 1235 reg_value_extractor.GetStringRef().c_str(), 1236 stop_packet.GetStringRef().c_str()); 1237 } 1238 } 1239 } 1240 } 1241 } 1242 1243 if (thread_sp) 1244 { 1245 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1246 1247 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1248 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1249 if (exc_type != 0) 1250 { 1251 const size_t exc_data_size = exc_data.size(); 1252 1253 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1254 exc_type, 1255 exc_data_size, 1256 exc_data_size >= 1 ? exc_data[0] : 0, 1257 exc_data_size >= 2 ? exc_data[1] : 0, 1258 exc_data_size >= 3 ? exc_data[2] : 0)); 1259 } 1260 else 1261 { 1262 bool handled = false; 1263 if (!reason.empty()) 1264 { 1265 if (reason.compare("trace") == 0) 1266 { 1267 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1268 handled = true; 1269 } 1270 else if (reason.compare("breakpoint") == 0) 1271 { 1272 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1273 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess().GetBreakpointSiteList().FindByAddress(pc); 1274 if (bp_site_sp) 1275 { 1276 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1277 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1278 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1279 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1280 { 1281 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1282 handled = true; 1283 } 1284 } 1285 1286 if (!handled) 1287 { 1288 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1289 } 1290 } 1291 else if (reason.compare("trap") == 0) 1292 { 1293 // Let the trap just use the standard signal stop reason below... 1294 } 1295 else if (reason.compare("watchpoint") == 0) 1296 { 1297 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1298 // TODO: locate the watchpoint somehow... 1299 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1300 handled = true; 1301 } 1302 else if (reason.compare("exception") == 0) 1303 { 1304 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1305 handled = true; 1306 } 1307 } 1308 1309 if (signo) 1310 { 1311 if (signo == SIGTRAP) 1312 { 1313 // Currently we are going to assume SIGTRAP means we are either 1314 // hitting a breakpoint or hardware single stepping. 1315 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1316 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess().GetBreakpointSiteList().FindByAddress(pc); 1317 if (bp_site_sp) 1318 { 1319 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1320 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1321 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1322 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1323 { 1324 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1325 handled = true; 1326 } 1327 } 1328 if (!handled) 1329 { 1330 // TODO: check for breakpoint or trap opcode in case there is a hard 1331 // coded software trap 1332 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1333 handled = true; 1334 } 1335 } 1336 if (!handled) 1337 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1338 } 1339 else 1340 { 1341 StopInfoSP invalid_stop_info_sp; 1342 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1343 } 1344 1345 if (!description.empty()) 1346 { 1347 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1348 if (stop_info_sp) 1349 { 1350 stop_info_sp->SetDescription (description.c_str()); 1351 } 1352 else 1353 { 1354 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1355 } 1356 } 1357 } 1358 } 1359 return eStateStopped; 1360 } 1361 break; 1362 1363 case 'W': 1364 // process exited 1365 return eStateExited; 1366 1367 default: 1368 break; 1369 } 1370 return eStateInvalid; 1371 } 1372 1373 void 1374 ProcessGDBRemote::RefreshStateAfterStop () 1375 { 1376 // Let all threads recover from stopping and do any clean up based 1377 // on the previous thread state (if any). 1378 m_thread_list.RefreshStateAfterStop(); 1379 SetThreadStopInfo (m_last_stop_packet); 1380 } 1381 1382 Error 1383 ProcessGDBRemote::DoHalt (bool &caused_stop) 1384 { 1385 Error error; 1386 1387 bool timed_out = false; 1388 Mutex::Locker locker; 1389 1390 if (m_public_state.GetValue() == eStateAttaching) 1391 { 1392 // We are being asked to halt during an attach. We need to just close 1393 // our file handle and debugserver will go away, and we can be done... 1394 m_gdb_comm.Disconnect(); 1395 } 1396 else 1397 { 1398 if (!m_gdb_comm.SendInterrupt (locker, 2, caused_stop, timed_out)) 1399 { 1400 if (timed_out) 1401 error.SetErrorString("timed out sending interrupt packet"); 1402 else 1403 error.SetErrorString("unknown error sending interrupt packet"); 1404 } 1405 } 1406 return error; 1407 } 1408 1409 Error 1410 ProcessGDBRemote::InterruptIfRunning 1411 ( 1412 bool discard_thread_plans, 1413 bool catch_stop_event, 1414 EventSP &stop_event_sp 1415 ) 1416 { 1417 Error error; 1418 1419 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1420 1421 bool paused_private_state_thread = false; 1422 const bool is_running = m_gdb_comm.IsRunning(); 1423 if (log) 1424 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1425 discard_thread_plans, 1426 catch_stop_event, 1427 is_running); 1428 1429 if (discard_thread_plans) 1430 { 1431 if (log) 1432 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1433 m_thread_list.DiscardThreadPlans(); 1434 } 1435 if (is_running) 1436 { 1437 if (catch_stop_event) 1438 { 1439 if (log) 1440 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1441 PausePrivateStateThread(); 1442 paused_private_state_thread = true; 1443 } 1444 1445 bool timed_out = false; 1446 bool sent_interrupt = false; 1447 Mutex::Locker locker; 1448 1449 if (!m_gdb_comm.SendInterrupt (locker, 1, sent_interrupt, timed_out)) 1450 { 1451 if (timed_out) 1452 error.SetErrorString("timed out sending interrupt packet"); 1453 else 1454 error.SetErrorString("unknown error sending interrupt packet"); 1455 if (paused_private_state_thread) 1456 ResumePrivateStateThread(); 1457 return error; 1458 } 1459 1460 if (catch_stop_event) 1461 { 1462 // LISTEN HERE 1463 TimeValue timeout_time; 1464 timeout_time = TimeValue::Now(); 1465 timeout_time.OffsetWithSeconds(5); 1466 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1467 1468 timed_out = state == eStateInvalid; 1469 if (log) 1470 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1471 1472 if (timed_out) 1473 error.SetErrorString("unable to verify target stopped"); 1474 } 1475 1476 if (paused_private_state_thread) 1477 { 1478 if (log) 1479 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1480 ResumePrivateStateThread(); 1481 } 1482 } 1483 return error; 1484 } 1485 1486 Error 1487 ProcessGDBRemote::WillDetach () 1488 { 1489 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1490 if (log) 1491 log->Printf ("ProcessGDBRemote::WillDetach()"); 1492 1493 bool discard_thread_plans = true; 1494 bool catch_stop_event = true; 1495 EventSP event_sp; 1496 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1497 } 1498 1499 Error 1500 ProcessGDBRemote::DoDetach() 1501 { 1502 Error error; 1503 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1504 if (log) 1505 log->Printf ("ProcessGDBRemote::DoDetach()"); 1506 1507 DisableAllBreakpointSites (); 1508 1509 m_thread_list.DiscardThreadPlans(); 1510 1511 size_t response_size = m_gdb_comm.SendPacket ("D", 1); 1512 if (log) 1513 { 1514 if (response_size) 1515 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1516 else 1517 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1518 } 1519 // Sleep for one second to let the process get all detached... 1520 StopAsyncThread (); 1521 1522 SetPrivateState (eStateDetached); 1523 ResumePrivateStateThread(); 1524 1525 //KillDebugserverProcess (); 1526 return error; 1527 } 1528 1529 Error 1530 ProcessGDBRemote::DoDestroy () 1531 { 1532 Error error; 1533 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1534 if (log) 1535 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1536 1537 // Interrupt if our inferior is running... 1538 if (m_gdb_comm.IsConnected()) 1539 { 1540 if (m_public_state.GetValue() != eStateAttaching) 1541 { 1542 1543 StringExtractorGDBRemote response; 1544 bool send_async = true; 1545 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1546 { 1547 char packet_cmd = response.GetChar(0); 1548 1549 if (packet_cmd == 'W' || packet_cmd == 'X') 1550 { 1551 m_last_stop_packet = response; 1552 SetExitStatus(response.GetHexU8(), NULL); 1553 } 1554 } 1555 else 1556 { 1557 SetExitStatus(SIGABRT, NULL); 1558 //error.SetErrorString("kill packet failed"); 1559 } 1560 } 1561 } 1562 StopAsyncThread (); 1563 KillDebugserverProcess (); 1564 return error; 1565 } 1566 1567 //------------------------------------------------------------------ 1568 // Process Queries 1569 //------------------------------------------------------------------ 1570 1571 bool 1572 ProcessGDBRemote::IsAlive () 1573 { 1574 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1575 } 1576 1577 addr_t 1578 ProcessGDBRemote::GetImageInfoAddress() 1579 { 1580 if (!m_gdb_comm.IsRunning()) 1581 { 1582 StringExtractorGDBRemote response; 1583 if (m_gdb_comm.SendPacketAndWaitForResponse("qShlibInfoAddr", ::strlen ("qShlibInfoAddr"), response, false)) 1584 { 1585 if (response.IsNormalResponse()) 1586 return response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS); 1587 } 1588 } 1589 return LLDB_INVALID_ADDRESS; 1590 } 1591 1592 //------------------------------------------------------------------ 1593 // Process Memory 1594 //------------------------------------------------------------------ 1595 size_t 1596 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1597 { 1598 if (size > m_max_memory_size) 1599 { 1600 // Keep memory read sizes down to a sane limit. This function will be 1601 // called multiple times in order to complete the task by 1602 // lldb_private::Process so it is ok to do this. 1603 size = m_max_memory_size; 1604 } 1605 1606 char packet[64]; 1607 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%zx", (uint64_t)addr, size); 1608 assert (packet_len + 1 < sizeof(packet)); 1609 StringExtractorGDBRemote response; 1610 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1611 { 1612 if (response.IsNormalResponse()) 1613 { 1614 error.Clear(); 1615 return response.GetHexBytes(buf, size, '\xdd'); 1616 } 1617 else if (response.IsErrorResponse()) 1618 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1619 else if (response.IsUnsupportedResponse()) 1620 error.SetErrorStringWithFormat("'%s' packet unsupported", packet); 1621 else 1622 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet, response.GetStringRef().c_str()); 1623 } 1624 else 1625 { 1626 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1627 } 1628 return 0; 1629 } 1630 1631 size_t 1632 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1633 { 1634 if (size > m_max_memory_size) 1635 { 1636 // Keep memory read sizes down to a sane limit. This function will be 1637 // called multiple times in order to complete the task by 1638 // lldb_private::Process so it is ok to do this. 1639 size = m_max_memory_size; 1640 } 1641 1642 StreamString packet; 1643 packet.Printf("M%llx,%zx:", addr, size); 1644 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1645 StringExtractorGDBRemote response; 1646 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1647 { 1648 if (response.IsOKResponse()) 1649 { 1650 error.Clear(); 1651 return size; 1652 } 1653 else if (response.IsErrorResponse()) 1654 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1655 else if (response.IsUnsupportedResponse()) 1656 error.SetErrorStringWithFormat("'%s' packet unsupported", packet.GetString().c_str()); 1657 else 1658 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1659 } 1660 else 1661 { 1662 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1663 } 1664 return 0; 1665 } 1666 1667 lldb::addr_t 1668 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1669 { 1670 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1671 1672 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1673 switch (supported) 1674 { 1675 case eLazyBoolCalculate: 1676 case eLazyBoolYes: 1677 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1678 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1679 return allocated_addr; 1680 1681 case eLazyBoolNo: 1682 // Call mmap() to create memory in the inferior.. 1683 unsigned prot = 0; 1684 if (permissions & lldb::ePermissionsReadable) 1685 prot |= eMmapProtRead; 1686 if (permissions & lldb::ePermissionsWritable) 1687 prot |= eMmapProtWrite; 1688 if (permissions & lldb::ePermissionsExecutable) 1689 prot |= eMmapProtExec; 1690 1691 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 1692 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 1693 m_addr_to_mmap_size[allocated_addr] = size; 1694 else 1695 allocated_addr = LLDB_INVALID_ADDRESS; 1696 break; 1697 } 1698 1699 if (allocated_addr == LLDB_INVALID_ADDRESS) 1700 error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); 1701 else 1702 error.Clear(); 1703 return allocated_addr; 1704 } 1705 1706 Error 1707 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 1708 { 1709 Error error; 1710 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1711 1712 switch (supported) 1713 { 1714 case eLazyBoolCalculate: 1715 // We should never be deallocating memory without allocating memory 1716 // first so we should never get eLazyBoolCalculate 1717 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 1718 break; 1719 1720 case eLazyBoolYes: 1721 if (!m_gdb_comm.DeallocateMemory (addr)) 1722 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1723 break; 1724 1725 case eLazyBoolNo: 1726 // Call munmap() to deallocate memory in the inferior.. 1727 { 1728 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 1729 if (pos != m_addr_to_mmap_size.end() && 1730 InferiorCallMunmap(this, addr, pos->second)) 1731 m_addr_to_mmap_size.erase (pos); 1732 else 1733 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1734 } 1735 break; 1736 } 1737 1738 return error; 1739 } 1740 1741 1742 //------------------------------------------------------------------ 1743 // Process STDIO 1744 //------------------------------------------------------------------ 1745 size_t 1746 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 1747 { 1748 if (m_stdio_communication.IsConnected()) 1749 { 1750 ConnectionStatus status; 1751 m_stdio_communication.Write(src, src_len, status, NULL); 1752 } 1753 return 0; 1754 } 1755 1756 Error 1757 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 1758 { 1759 Error error; 1760 assert (bp_site != NULL); 1761 1762 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1763 user_id_t site_id = bp_site->GetID(); 1764 const addr_t addr = bp_site->GetLoadAddress(); 1765 if (log) 1766 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 1767 1768 if (bp_site->IsEnabled()) 1769 { 1770 if (log) 1771 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 1772 return error; 1773 } 1774 else 1775 { 1776 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1777 1778 if (bp_site->HardwarePreferred()) 1779 { 1780 // Try and set hardware breakpoint, and if that fails, fall through 1781 // and set a software breakpoint? 1782 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 1783 { 1784 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 1785 { 1786 bp_site->SetEnabled(true); 1787 bp_site->SetType (BreakpointSite::eHardware); 1788 return error; 1789 } 1790 } 1791 } 1792 1793 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 1794 { 1795 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 1796 { 1797 bp_site->SetEnabled(true); 1798 bp_site->SetType (BreakpointSite::eExternal); 1799 return error; 1800 } 1801 } 1802 1803 return EnableSoftwareBreakpoint (bp_site); 1804 } 1805 1806 if (log) 1807 { 1808 const char *err_string = error.AsCString(); 1809 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 1810 bp_site->GetLoadAddress(), 1811 err_string ? err_string : "NULL"); 1812 } 1813 // We shouldn't reach here on a successful breakpoint enable... 1814 if (error.Success()) 1815 error.SetErrorToGenericError(); 1816 return error; 1817 } 1818 1819 Error 1820 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 1821 { 1822 Error error; 1823 assert (bp_site != NULL); 1824 addr_t addr = bp_site->GetLoadAddress(); 1825 user_id_t site_id = bp_site->GetID(); 1826 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1827 if (log) 1828 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 1829 1830 if (bp_site->IsEnabled()) 1831 { 1832 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1833 1834 BreakpointSite::Type bp_type = bp_site->GetType(); 1835 switch (bp_type) 1836 { 1837 case BreakpointSite::eSoftware: 1838 error = DisableSoftwareBreakpoint (bp_site); 1839 break; 1840 1841 case BreakpointSite::eHardware: 1842 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 1843 error.SetErrorToGenericError(); 1844 break; 1845 1846 case BreakpointSite::eExternal: 1847 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 1848 error.SetErrorToGenericError(); 1849 break; 1850 } 1851 if (error.Success()) 1852 bp_site->SetEnabled(false); 1853 } 1854 else 1855 { 1856 if (log) 1857 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 1858 return error; 1859 } 1860 1861 if (error.Success()) 1862 error.SetErrorToGenericError(); 1863 return error; 1864 } 1865 1866 // Pre-requisite: wp != NULL. 1867 static GDBStoppointType 1868 GetGDBStoppointType (Watchpoint *wp) 1869 { 1870 assert(wp); 1871 bool watch_read = wp->WatchpointRead(); 1872 bool watch_write = wp->WatchpointWrite(); 1873 1874 // watch_read and watch_write cannot both be false. 1875 assert(watch_read || watch_write); 1876 if (watch_read && watch_write) 1877 return eWatchpointReadWrite; 1878 else if (watch_read) 1879 return eWatchpointRead; 1880 else // Must be watch_write, then. 1881 return eWatchpointWrite; 1882 } 1883 1884 Error 1885 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 1886 { 1887 Error error; 1888 if (wp) 1889 { 1890 user_id_t watchID = wp->GetID(); 1891 addr_t addr = wp->GetLoadAddress(); 1892 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 1893 if (log) 1894 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 1895 if (wp->IsEnabled()) 1896 { 1897 if (log) 1898 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 1899 return error; 1900 } 1901 1902 GDBStoppointType type = GetGDBStoppointType(wp); 1903 // Pass down an appropriate z/Z packet... 1904 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 1905 { 1906 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 1907 { 1908 wp->SetEnabled(true); 1909 return error; 1910 } 1911 else 1912 error.SetErrorString("sending gdb watchpoint packet failed"); 1913 } 1914 else 1915 error.SetErrorString("watchpoints not supported"); 1916 } 1917 else 1918 { 1919 error.SetErrorString("Watchpoint argument was NULL."); 1920 } 1921 if (error.Success()) 1922 error.SetErrorToGenericError(); 1923 return error; 1924 } 1925 1926 Error 1927 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 1928 { 1929 Error error; 1930 if (wp) 1931 { 1932 user_id_t watchID = wp->GetID(); 1933 1934 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 1935 1936 addr_t addr = wp->GetLoadAddress(); 1937 if (log) 1938 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 1939 1940 if (!wp->IsEnabled()) 1941 { 1942 if (log) 1943 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 1944 return error; 1945 } 1946 1947 if (wp->IsHardware()) 1948 { 1949 GDBStoppointType type = GetGDBStoppointType(wp); 1950 // Pass down an appropriate z/Z packet... 1951 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 1952 { 1953 wp->SetEnabled(false); 1954 return error; 1955 } 1956 else 1957 error.SetErrorString("sending gdb watchpoint packet failed"); 1958 } 1959 // TODO: clear software watchpoints if we implement them 1960 } 1961 else 1962 { 1963 error.SetErrorString("Watchpoint argument was NULL."); 1964 } 1965 if (error.Success()) 1966 error.SetErrorToGenericError(); 1967 return error; 1968 } 1969 1970 void 1971 ProcessGDBRemote::Clear() 1972 { 1973 m_flags = 0; 1974 m_thread_list.Clear(); 1975 } 1976 1977 Error 1978 ProcessGDBRemote::DoSignal (int signo) 1979 { 1980 Error error; 1981 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1982 if (log) 1983 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 1984 1985 if (!m_gdb_comm.SendAsyncSignal (signo)) 1986 error.SetErrorStringWithFormat("failed to send signal %i", signo); 1987 return error; 1988 } 1989 1990 Error 1991 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 1992 { 1993 Error error; 1994 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 1995 { 1996 // If we locate debugserver, keep that located version around 1997 static FileSpec g_debugserver_file_spec; 1998 1999 ProcessLaunchInfo launch_info; 2000 char debugserver_path[PATH_MAX]; 2001 FileSpec &debugserver_file_spec = launch_info.GetExecutableFile(); 2002 2003 // Always check to see if we have an environment override for the path 2004 // to the debugserver to use and use it if we do. 2005 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2006 if (env_debugserver_path) 2007 debugserver_file_spec.SetFile (env_debugserver_path, false); 2008 else 2009 debugserver_file_spec = g_debugserver_file_spec; 2010 bool debugserver_exists = debugserver_file_spec.Exists(); 2011 if (!debugserver_exists) 2012 { 2013 // The debugserver binary is in the LLDB.framework/Resources 2014 // directory. 2015 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2016 { 2017 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2018 debugserver_exists = debugserver_file_spec.Exists(); 2019 if (debugserver_exists) 2020 { 2021 g_debugserver_file_spec = debugserver_file_spec; 2022 } 2023 else 2024 { 2025 g_debugserver_file_spec.Clear(); 2026 debugserver_file_spec.Clear(); 2027 } 2028 } 2029 } 2030 2031 if (debugserver_exists) 2032 { 2033 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2034 2035 m_stdio_communication.Clear(); 2036 2037 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2038 2039 Args &debugserver_args = launch_info.GetArguments(); 2040 char arg_cstr[PATH_MAX]; 2041 2042 // Start args with "debugserver /file/path -r --" 2043 debugserver_args.AppendArgument(debugserver_path); 2044 debugserver_args.AppendArgument(debugserver_url); 2045 // use native registers, not the GDB registers 2046 debugserver_args.AppendArgument("--native-regs"); 2047 // make debugserver run in its own session so signals generated by 2048 // special terminal key sequences (^C) don't affect debugserver 2049 debugserver_args.AppendArgument("--setsid"); 2050 2051 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2052 if (env_debugserver_log_file) 2053 { 2054 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2055 debugserver_args.AppendArgument(arg_cstr); 2056 } 2057 2058 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2059 if (env_debugserver_log_flags) 2060 { 2061 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2062 debugserver_args.AppendArgument(arg_cstr); 2063 } 2064 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2065 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2066 2067 // We currently send down all arguments, attach pids, or attach 2068 // process names in dedicated GDB server packets, so we don't need 2069 // to pass them as arguments. This is currently because of all the 2070 // things we need to setup prior to launching: the environment, 2071 // current working dir, file actions, etc. 2072 #if 0 2073 // Now append the program arguments 2074 if (inferior_argv) 2075 { 2076 // Terminate the debugserver args so we can now append the inferior args 2077 debugserver_args.AppendArgument("--"); 2078 2079 for (int i = 0; inferior_argv[i] != NULL; ++i) 2080 debugserver_args.AppendArgument (inferior_argv[i]); 2081 } 2082 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2083 { 2084 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2085 debugserver_args.AppendArgument (arg_cstr); 2086 } 2087 else if (attach_name && attach_name[0]) 2088 { 2089 if (wait_for_launch) 2090 debugserver_args.AppendArgument ("--waitfor"); 2091 else 2092 debugserver_args.AppendArgument ("--attach"); 2093 debugserver_args.AppendArgument (attach_name); 2094 } 2095 #endif 2096 2097 ProcessLaunchInfo::FileAction file_action; 2098 2099 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2100 // to "/dev/null" if we run into any problems. 2101 file_action.Close (STDIN_FILENO); 2102 launch_info.AppendFileAction (file_action); 2103 file_action.Close (STDOUT_FILENO); 2104 launch_info.AppendFileAction (file_action); 2105 file_action.Close (STDERR_FILENO); 2106 launch_info.AppendFileAction (file_action); 2107 2108 if (log) 2109 { 2110 StreamString strm; 2111 debugserver_args.Dump (&strm); 2112 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2113 } 2114 2115 launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2116 2117 error = Host::LaunchProcess(launch_info); 2118 2119 if (error.Success ()) 2120 m_debugserver_pid = launch_info.GetProcessID(); 2121 else 2122 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2123 2124 if (error.Fail() || log) 2125 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%i, path='%s'", m_debugserver_pid, debugserver_path); 2126 } 2127 else 2128 { 2129 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2130 } 2131 2132 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2133 StartAsyncThread (); 2134 } 2135 return error; 2136 } 2137 2138 bool 2139 ProcessGDBRemote::MonitorDebugserverProcess 2140 ( 2141 void *callback_baton, 2142 lldb::pid_t debugserver_pid, 2143 bool exited, // True if the process did exit 2144 int signo, // Zero for no signal 2145 int exit_status // Exit value of process if signal is zero 2146 ) 2147 { 2148 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2149 // and might not exist anymore, so we need to carefully try to get the 2150 // target for this process first since we have a race condition when 2151 // we are done running between getting the notice that the inferior 2152 // process has died and the debugserver that was debugging this process. 2153 // In our test suite, we are also continually running process after 2154 // process, so we must be very careful to make sure: 2155 // 1 - process object hasn't been deleted already 2156 // 2 - that a new process object hasn't been recreated in its place 2157 2158 // "debugserver_pid" argument passed in is the process ID for 2159 // debugserver that we are tracking... 2160 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2161 2162 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2163 2164 // Get a shared pointer to the target that has a matching process pointer. 2165 // This target could be gone, or the target could already have a new process 2166 // object inside of it 2167 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2168 2169 if (log) 2170 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%i, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2171 2172 if (target_sp) 2173 { 2174 // We found a process in a target that matches, but another thread 2175 // might be in the process of launching a new process that will 2176 // soon replace it, so get a shared pointer to the process so we 2177 // can keep it alive. 2178 ProcessSP process_sp (target_sp->GetProcessSP()); 2179 // Now we have a shared pointer to the process that can't go away on us 2180 // so we now make sure it was the same as the one passed in, and also make 2181 // sure that our previous "process *" didn't get deleted and have a new 2182 // "process *" created in its place with the same pointer. To verify this 2183 // we make sure the process has our debugserver process ID. If we pass all 2184 // of these tests, then we are sure that this process is the one we were 2185 // looking for. 2186 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2187 { 2188 // Sleep for a half a second to make sure our inferior process has 2189 // time to set its exit status before we set it incorrectly when 2190 // both the debugserver and the inferior process shut down. 2191 usleep (500000); 2192 // If our process hasn't yet exited, debugserver might have died. 2193 // If the process did exit, the we are reaping it. 2194 const StateType state = process->GetState(); 2195 2196 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2197 state != eStateInvalid && 2198 state != eStateUnloaded && 2199 state != eStateExited && 2200 state != eStateDetached) 2201 { 2202 char error_str[1024]; 2203 if (signo) 2204 { 2205 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2206 if (signal_cstr) 2207 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2208 else 2209 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2210 } 2211 else 2212 { 2213 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2214 } 2215 2216 process->SetExitStatus (-1, error_str); 2217 } 2218 // Debugserver has exited we need to let our ProcessGDBRemote 2219 // know that it no longer has a debugserver instance 2220 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2221 } 2222 } 2223 return true; 2224 } 2225 2226 void 2227 ProcessGDBRemote::KillDebugserverProcess () 2228 { 2229 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2230 { 2231 ::kill (m_debugserver_pid, SIGINT); 2232 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2233 } 2234 } 2235 2236 void 2237 ProcessGDBRemote::Initialize() 2238 { 2239 static bool g_initialized = false; 2240 2241 if (g_initialized == false) 2242 { 2243 g_initialized = true; 2244 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2245 GetPluginDescriptionStatic(), 2246 CreateInstance); 2247 2248 Log::Callbacks log_callbacks = { 2249 ProcessGDBRemoteLog::DisableLog, 2250 ProcessGDBRemoteLog::EnableLog, 2251 ProcessGDBRemoteLog::ListLogCategories 2252 }; 2253 2254 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2255 } 2256 } 2257 2258 bool 2259 ProcessGDBRemote::StartAsyncThread () 2260 { 2261 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2262 2263 if (log) 2264 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2265 2266 // Create a thread that watches our internal state and controls which 2267 // events make it to clients (into the DCProcess event queue). 2268 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2269 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2270 } 2271 2272 void 2273 ProcessGDBRemote::StopAsyncThread () 2274 { 2275 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2276 2277 if (log) 2278 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2279 2280 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2281 2282 // This will shut down the async thread. 2283 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2284 2285 // Stop the stdio thread 2286 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2287 { 2288 Host::ThreadJoin (m_async_thread, NULL, NULL); 2289 } 2290 } 2291 2292 2293 void * 2294 ProcessGDBRemote::AsyncThread (void *arg) 2295 { 2296 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2297 2298 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2299 if (log) 2300 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2301 2302 Listener listener ("ProcessGDBRemote::AsyncThread"); 2303 EventSP event_sp; 2304 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2305 eBroadcastBitAsyncThreadShouldExit; 2306 2307 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2308 { 2309 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2310 2311 bool done = false; 2312 while (!done) 2313 { 2314 if (log) 2315 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2316 if (listener.WaitForEvent (NULL, event_sp)) 2317 { 2318 const uint32_t event_type = event_sp->GetType(); 2319 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2320 { 2321 if (log) 2322 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2323 2324 switch (event_type) 2325 { 2326 case eBroadcastBitAsyncContinue: 2327 { 2328 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2329 2330 if (continue_packet) 2331 { 2332 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2333 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2334 if (log) 2335 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2336 2337 if (::strstr (continue_cstr, "vAttach") == NULL) 2338 process->SetPrivateState(eStateRunning); 2339 StringExtractorGDBRemote response; 2340 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2341 2342 switch (stop_state) 2343 { 2344 case eStateStopped: 2345 case eStateCrashed: 2346 case eStateSuspended: 2347 process->m_last_stop_packet = response; 2348 process->SetPrivateState (stop_state); 2349 break; 2350 2351 case eStateExited: 2352 process->m_last_stop_packet = response; 2353 response.SetFilePos(1); 2354 process->SetExitStatus(response.GetHexU8(), NULL); 2355 done = true; 2356 break; 2357 2358 case eStateInvalid: 2359 process->SetExitStatus(-1, "lost connection"); 2360 break; 2361 2362 default: 2363 process->SetPrivateState (stop_state); 2364 break; 2365 } 2366 } 2367 } 2368 break; 2369 2370 case eBroadcastBitAsyncThreadShouldExit: 2371 if (log) 2372 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2373 done = true; 2374 break; 2375 2376 default: 2377 if (log) 2378 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2379 done = true; 2380 break; 2381 } 2382 } 2383 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2384 { 2385 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2386 { 2387 process->SetExitStatus (-1, "lost connection"); 2388 done = true; 2389 } 2390 } 2391 } 2392 else 2393 { 2394 if (log) 2395 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2396 done = true; 2397 } 2398 } 2399 } 2400 2401 if (log) 2402 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2403 2404 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2405 return NULL; 2406 } 2407 2408 const char * 2409 ProcessGDBRemote::GetDispatchQueueNameForThread 2410 ( 2411 addr_t thread_dispatch_qaddr, 2412 std::string &dispatch_queue_name 2413 ) 2414 { 2415 dispatch_queue_name.clear(); 2416 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2417 { 2418 // Cache the dispatch_queue_offsets_addr value so we don't always have 2419 // to look it up 2420 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2421 { 2422 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2423 const Symbol *dispatch_queue_offsets_symbol = NULL; 2424 ModuleSP module_sp(GetTarget().GetImages().FindFirstModuleForFileSpec (FileSpec("libSystem.B.dylib", false), NULL, NULL)); 2425 if (module_sp) 2426 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2427 2428 if (dispatch_queue_offsets_symbol == NULL) 2429 { 2430 module_sp = GetTarget().GetImages().FindFirstModuleForFileSpec (FileSpec("libdispatch.dylib", false), NULL, NULL); 2431 if (module_sp) 2432 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2433 } 2434 if (dispatch_queue_offsets_symbol) 2435 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetValue().GetLoadAddress(&m_target); 2436 2437 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2438 return NULL; 2439 } 2440 2441 uint8_t memory_buffer[8]; 2442 DataExtractor data (memory_buffer, 2443 sizeof(memory_buffer), 2444 m_target.GetArchitecture().GetByteOrder(), 2445 m_target.GetArchitecture().GetAddressByteSize()); 2446 2447 // Excerpt from src/queue_private.h 2448 struct dispatch_queue_offsets_s 2449 { 2450 uint16_t dqo_version; 2451 uint16_t dqo_label; 2452 uint16_t dqo_label_size; 2453 } dispatch_queue_offsets; 2454 2455 2456 Error error; 2457 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2458 { 2459 uint32_t data_offset = 0; 2460 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2461 { 2462 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2463 { 2464 data_offset = 0; 2465 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2466 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2467 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2468 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2469 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2470 dispatch_queue_name.erase (bytes_read); 2471 } 2472 } 2473 } 2474 } 2475 if (dispatch_queue_name.empty()) 2476 return NULL; 2477 return dispatch_queue_name.c_str(); 2478 } 2479 2480 //uint32_t 2481 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2482 //{ 2483 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2484 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2485 // if (m_local_debugserver) 2486 // { 2487 // return Host::ListProcessesMatchingName (name, matches, pids); 2488 // } 2489 // else 2490 // { 2491 // // FIXME: Implement talking to the remote debugserver. 2492 // return 0; 2493 // } 2494 // 2495 //} 2496 // 2497 bool 2498 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2499 lldb_private::StoppointCallbackContext *context, 2500 lldb::user_id_t break_id, 2501 lldb::user_id_t break_loc_id) 2502 { 2503 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2504 // run so I can stop it if that's what I want to do. 2505 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2506 if (log) 2507 log->Printf("Hit New Thread Notification breakpoint."); 2508 return false; 2509 } 2510 2511 2512 bool 2513 ProcessGDBRemote::StartNoticingNewThreads() 2514 { 2515 static const char *bp_names[] = 2516 { 2517 "start_wqthread", 2518 "_pthread_wqthread", 2519 "_pthread_start", 2520 NULL 2521 }; 2522 2523 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2524 size_t num_bps = m_thread_observation_bps.size(); 2525 if (num_bps != 0) 2526 { 2527 for (int i = 0; i < num_bps; i++) 2528 { 2529 lldb::BreakpointSP break_sp = m_target.GetBreakpointByID(m_thread_observation_bps[i]); 2530 if (break_sp) 2531 { 2532 if (log && log->GetVerbose()) 2533 log->Printf("Enabled noticing new thread breakpoint."); 2534 break_sp->SetEnabled(true); 2535 } 2536 } 2537 } 2538 else 2539 { 2540 for (int i = 0; bp_names[i] != NULL; i++) 2541 { 2542 Breakpoint *breakpoint = m_target.CreateBreakpoint (NULL, NULL, bp_names[i], eFunctionNameTypeFull, true).get(); 2543 if (breakpoint) 2544 { 2545 if (log && log->GetVerbose()) 2546 log->Printf("Successfully created new thread notification breakpoint at \"%s\".", bp_names[i]); 2547 m_thread_observation_bps.push_back(breakpoint->GetID()); 2548 breakpoint->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2549 } 2550 else 2551 { 2552 if (log) 2553 log->Printf("Failed to create new thread notification breakpoint."); 2554 return false; 2555 } 2556 } 2557 } 2558 2559 return true; 2560 } 2561 2562 bool 2563 ProcessGDBRemote::StopNoticingNewThreads() 2564 { 2565 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2566 if (log && log->GetVerbose()) 2567 log->Printf ("Disabling new thread notification breakpoint."); 2568 size_t num_bps = m_thread_observation_bps.size(); 2569 if (num_bps != 0) 2570 { 2571 for (int i = 0; i < num_bps; i++) 2572 { 2573 2574 lldb::BreakpointSP break_sp = m_target.GetBreakpointByID(m_thread_observation_bps[i]); 2575 if (break_sp) 2576 { 2577 break_sp->SetEnabled(false); 2578 } 2579 } 2580 } 2581 return true; 2582 } 2583 2584 2585