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_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 127 m_register_info (), 128 m_async_broadcaster ("lldb.process.gdb-remote.async-broadcaster"), 129 m_async_thread (LLDB_INVALID_HOST_THREAD), 130 m_continue_c_tids (), 131 m_continue_C_tids (), 132 m_continue_s_tids (), 133 m_continue_S_tids (), 134 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 135 m_max_memory_size (512), 136 m_waiting_for_attach (false), 137 m_thread_observation_bps() 138 { 139 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 140 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 141 } 142 143 //---------------------------------------------------------------------- 144 // Destructor 145 //---------------------------------------------------------------------- 146 ProcessGDBRemote::~ProcessGDBRemote() 147 { 148 // m_mach_process.UnregisterNotificationCallbacks (this); 149 Clear(); 150 // We need to call finalize on the process before destroying ourselves 151 // to make sure all of the broadcaster cleanup goes as planned. If we 152 // destruct this class, then Process::~Process() might have problems 153 // trying to fully destroy the broadcaster. 154 Finalize(); 155 } 156 157 //---------------------------------------------------------------------- 158 // PluginInterface 159 //---------------------------------------------------------------------- 160 const char * 161 ProcessGDBRemote::GetPluginName() 162 { 163 return "Process debugging plug-in that uses the GDB remote protocol"; 164 } 165 166 const char * 167 ProcessGDBRemote::GetShortPluginName() 168 { 169 return GetPluginNameStatic(); 170 } 171 172 uint32_t 173 ProcessGDBRemote::GetPluginVersion() 174 { 175 return 1; 176 } 177 178 void 179 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 180 { 181 if (!force && m_register_info.GetNumRegisters() > 0) 182 return; 183 184 char packet[128]; 185 m_register_info.Clear(); 186 uint32_t reg_offset = 0; 187 uint32_t reg_num = 0; 188 StringExtractorGDBRemote::ResponseType response_type; 189 for (response_type = StringExtractorGDBRemote::eResponse; 190 response_type == StringExtractorGDBRemote::eResponse; 191 ++reg_num) 192 { 193 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 194 assert (packet_len < sizeof(packet)); 195 StringExtractorGDBRemote response; 196 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 197 { 198 response_type = response.GetResponseType(); 199 if (response_type == StringExtractorGDBRemote::eResponse) 200 { 201 std::string name; 202 std::string value; 203 ConstString reg_name; 204 ConstString alt_name; 205 ConstString set_name; 206 RegisterInfo reg_info = { NULL, // Name 207 NULL, // Alt name 208 0, // byte size 209 reg_offset, // offset 210 eEncodingUint, // encoding 211 eFormatHex, // formate 212 { 213 LLDB_INVALID_REGNUM, // GCC reg num 214 LLDB_INVALID_REGNUM, // DWARF reg num 215 LLDB_INVALID_REGNUM, // generic reg num 216 reg_num, // GDB reg num 217 reg_num // native register number 218 } 219 }; 220 221 while (response.GetNameColonValue(name, value)) 222 { 223 if (name.compare("name") == 0) 224 { 225 reg_name.SetCString(value.c_str()); 226 } 227 else if (name.compare("alt-name") == 0) 228 { 229 alt_name.SetCString(value.c_str()); 230 } 231 else if (name.compare("bitsize") == 0) 232 { 233 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 234 } 235 else if (name.compare("offset") == 0) 236 { 237 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 238 if (reg_offset != offset) 239 { 240 reg_offset = offset; 241 } 242 } 243 else if (name.compare("encoding") == 0) 244 { 245 if (value.compare("uint") == 0) 246 reg_info.encoding = eEncodingUint; 247 else if (value.compare("sint") == 0) 248 reg_info.encoding = eEncodingSint; 249 else if (value.compare("ieee754") == 0) 250 reg_info.encoding = eEncodingIEEE754; 251 else if (value.compare("vector") == 0) 252 reg_info.encoding = eEncodingVector; 253 } 254 else if (name.compare("format") == 0) 255 { 256 if (value.compare("binary") == 0) 257 reg_info.format = eFormatBinary; 258 else if (value.compare("decimal") == 0) 259 reg_info.format = eFormatDecimal; 260 else if (value.compare("hex") == 0) 261 reg_info.format = eFormatHex; 262 else if (value.compare("float") == 0) 263 reg_info.format = eFormatFloat; 264 else if (value.compare("vector-sint8") == 0) 265 reg_info.format = eFormatVectorOfSInt8; 266 else if (value.compare("vector-uint8") == 0) 267 reg_info.format = eFormatVectorOfUInt8; 268 else if (value.compare("vector-sint16") == 0) 269 reg_info.format = eFormatVectorOfSInt16; 270 else if (value.compare("vector-uint16") == 0) 271 reg_info.format = eFormatVectorOfUInt16; 272 else if (value.compare("vector-sint32") == 0) 273 reg_info.format = eFormatVectorOfSInt32; 274 else if (value.compare("vector-uint32") == 0) 275 reg_info.format = eFormatVectorOfUInt32; 276 else if (value.compare("vector-float32") == 0) 277 reg_info.format = eFormatVectorOfFloat32; 278 else if (value.compare("vector-uint128") == 0) 279 reg_info.format = eFormatVectorOfUInt128; 280 } 281 else if (name.compare("set") == 0) 282 { 283 set_name.SetCString(value.c_str()); 284 } 285 else if (name.compare("gcc") == 0) 286 { 287 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 288 } 289 else if (name.compare("dwarf") == 0) 290 { 291 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 292 } 293 else if (name.compare("generic") == 0) 294 { 295 if (value.compare("pc") == 0) 296 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; 297 else if (value.compare("sp") == 0) 298 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; 299 else if (value.compare("fp") == 0) 300 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; 301 else if (value.compare("ra") == 0) 302 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; 303 else if (value.compare("flags") == 0) 304 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS; 305 else if (value.find("arg") == 0) 306 { 307 if (value.size() == 4) 308 { 309 switch (value[3]) 310 { 311 case '1': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG1; break; 312 case '2': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG2; break; 313 case '3': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG3; break; 314 case '4': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG4; break; 315 case '5': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG5; break; 316 case '6': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG6; break; 317 case '7': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG7; break; 318 case '8': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG8; break; 319 } 320 } 321 } 322 } 323 } 324 325 reg_info.byte_offset = reg_offset; 326 assert (reg_info.byte_size != 0); 327 reg_offset += reg_info.byte_size; 328 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 329 } 330 } 331 else 332 { 333 response_type = StringExtractorGDBRemote::eError; 334 break; 335 } 336 } 337 338 if (reg_num == 0) 339 { 340 // We didn't get anything. See if we are debugging ARM and fill with 341 // a hard coded register set until we can get an updated debugserver 342 // down on the devices. 343 344 if (!GetTarget().GetArchitecture().IsValid() 345 && m_gdb_comm.GetHostArchitecture().IsValid() 346 && m_gdb_comm.GetHostArchitecture().GetMachine() == llvm::Triple::arm 347 && m_gdb_comm.GetHostArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) 348 { 349 m_register_info.HardcodeARMRegisters(); 350 } 351 else if (GetTarget().GetArchitecture().GetMachine() == llvm::Triple::arm) 352 { 353 m_register_info.HardcodeARMRegisters(); 354 } 355 } 356 m_register_info.Finalize (); 357 } 358 359 Error 360 ProcessGDBRemote::WillLaunch (Module* module) 361 { 362 return WillLaunchOrAttach (); 363 } 364 365 Error 366 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 367 { 368 return WillLaunchOrAttach (); 369 } 370 371 Error 372 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 373 { 374 return WillLaunchOrAttach (); 375 } 376 377 Error 378 ProcessGDBRemote::DoConnectRemote (const char *remote_url) 379 { 380 Error error (WillLaunchOrAttach ()); 381 382 if (error.Fail()) 383 return error; 384 385 error = ConnectToDebugserver (remote_url); 386 387 if (error.Fail()) 388 return error; 389 StartAsyncThread (); 390 391 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 392 if (pid == LLDB_INVALID_PROCESS_ID) 393 { 394 // We don't have a valid process ID, so note that we are connected 395 // and could now request to launch or attach, or get remote process 396 // listings... 397 SetPrivateState (eStateConnected); 398 } 399 else 400 { 401 // We have a valid process 402 SetID (pid); 403 GetThreadList(); 404 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 405 { 406 const StateType state = SetThreadStopInfo (m_last_stop_packet); 407 if (state == eStateStopped) 408 { 409 SetPrivateState (state); 410 } 411 else 412 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 413 } 414 else 415 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 416 } 417 return error; 418 } 419 420 Error 421 ProcessGDBRemote::WillLaunchOrAttach () 422 { 423 Error error; 424 m_stdio_communication.Clear (); 425 return error; 426 } 427 428 //---------------------------------------------------------------------- 429 // Process Control 430 //---------------------------------------------------------------------- 431 Error 432 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 433 { 434 Error error; 435 436 uint32_t launch_flags = launch_info.GetFlags().Get(); 437 const char *stdin_path = NULL; 438 const char *stdout_path = NULL; 439 const char *stderr_path = NULL; 440 const char *working_dir = launch_info.GetWorkingDirectory(); 441 442 const ProcessLaunchInfo::FileAction *file_action; 443 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 444 if (file_action) 445 { 446 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 447 stdin_path = file_action->GetPath(); 448 } 449 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 450 if (file_action) 451 { 452 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 453 stdout_path = file_action->GetPath(); 454 } 455 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 456 if (file_action) 457 { 458 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 459 stderr_path = file_action->GetPath(); 460 } 461 462 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 463 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 464 // ::LogSetLogFile ("/dev/stdout"); 465 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 466 467 ObjectFile * object_file = exe_module->GetObjectFile(); 468 if (object_file) 469 { 470 char host_port[128]; 471 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 472 char connect_url[128]; 473 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 474 475 // Make sure we aren't already connected? 476 if (!m_gdb_comm.IsConnected()) 477 { 478 error = StartDebugserverProcess (host_port); 479 if (error.Fail()) 480 { 481 if (log) 482 log->Printf("failed to start debugserver process: %s", error.AsCString()); 483 return error; 484 } 485 486 error = ConnectToDebugserver (connect_url); 487 } 488 489 if (error.Success()) 490 { 491 lldb_utility::PseudoTerminal pty; 492 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 493 494 // If the debugserver is local and we aren't disabling STDIO, lets use 495 // a pseudo terminal to instead of relying on the 'O' packets for stdio 496 // since 'O' packets can really slow down debugging if the inferior 497 // does a lot of output. 498 PlatformSP platform_sp (m_target.GetPlatform()); 499 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 500 { 501 const char *slave_name = NULL; 502 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 503 { 504 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 505 slave_name = pty.GetSlaveName (NULL, 0); 506 } 507 if (stdin_path == NULL) 508 stdin_path = slave_name; 509 510 if (stdout_path == NULL) 511 stdout_path = slave_name; 512 513 if (stderr_path == NULL) 514 stderr_path = slave_name; 515 } 516 517 // Set STDIN to /dev/null if we want STDIO disabled or if either 518 // STDOUT or STDERR have been set to something and STDIN hasn't 519 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 520 stdin_path = "/dev/null"; 521 522 // Set STDOUT to /dev/null if we want STDIO disabled or if either 523 // STDIN or STDERR have been set to something and STDOUT hasn't 524 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 525 stdout_path = "/dev/null"; 526 527 // Set STDERR to /dev/null if we want STDIO disabled or if either 528 // STDIN or STDOUT have been set to something and STDERR hasn't 529 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 530 stderr_path = "/dev/null"; 531 532 if (stdin_path) 533 m_gdb_comm.SetSTDIN (stdin_path); 534 if (stdout_path) 535 m_gdb_comm.SetSTDOUT (stdout_path); 536 if (stderr_path) 537 m_gdb_comm.SetSTDERR (stderr_path); 538 539 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 540 541 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 542 543 if (working_dir && working_dir[0]) 544 { 545 m_gdb_comm.SetWorkingDir (working_dir); 546 } 547 548 // Send the environment and the program + arguments after we connect 549 const Args &environment = launch_info.GetEnvironmentEntries(); 550 if (environment.GetArgumentCount()) 551 { 552 size_t num_environment_entries = environment.GetArgumentCount(); 553 for (size_t i=0; i<num_environment_entries; ++i) 554 { 555 const char *env_entry = environment.GetArgumentAtIndex(i); 556 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 557 break; 558 } 559 } 560 561 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 562 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 563 if (arg_packet_err == 0) 564 { 565 std::string error_str; 566 if (m_gdb_comm.GetLaunchSuccess (error_str)) 567 { 568 SetID (m_gdb_comm.GetCurrentProcessID ()); 569 } 570 else 571 { 572 error.SetErrorString (error_str.c_str()); 573 } 574 } 575 else 576 { 577 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 578 } 579 580 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 581 582 if (GetID() == LLDB_INVALID_PROCESS_ID) 583 { 584 if (log) 585 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 586 KillDebugserverProcess (); 587 return error; 588 } 589 590 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 591 { 592 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 593 594 if (!disable_stdio) 595 { 596 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 597 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 598 } 599 } 600 } 601 else 602 { 603 if (log) 604 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 605 } 606 } 607 else 608 { 609 // Set our user ID to an invalid process ID. 610 SetID(LLDB_INVALID_PROCESS_ID); 611 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 612 exe_module->GetFileSpec().GetFilename().AsCString(), 613 exe_module->GetArchitecture().GetArchitectureName()); 614 } 615 return error; 616 617 } 618 619 620 Error 621 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 622 { 623 Error error; 624 // Sleep and wait a bit for debugserver to start to listen... 625 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 626 if (conn_ap.get()) 627 { 628 const uint32_t max_retry_count = 50; 629 uint32_t retry_count = 0; 630 while (!m_gdb_comm.IsConnected()) 631 { 632 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 633 { 634 m_gdb_comm.SetConnection (conn_ap.release()); 635 break; 636 } 637 retry_count++; 638 639 if (retry_count >= max_retry_count) 640 break; 641 642 usleep (100000); 643 } 644 } 645 646 if (!m_gdb_comm.IsConnected()) 647 { 648 if (error.Success()) 649 error.SetErrorString("not connected to remote gdb server"); 650 return error; 651 } 652 653 // We always seem to be able to open a connection to a local port 654 // so we need to make sure we can then send data to it. If we can't 655 // then we aren't actually connected to anything, so try and do the 656 // handshake with the remote GDB server and make sure that goes 657 // alright. 658 if (!m_gdb_comm.HandshakeWithServer (NULL)) 659 { 660 m_gdb_comm.Disconnect(); 661 if (error.Success()) 662 error.SetErrorString("not connected to remote gdb server"); 663 return error; 664 } 665 m_gdb_comm.ResetDiscoverableSettings(); 666 m_gdb_comm.QueryNoAckModeSupported (); 667 m_gdb_comm.GetThreadSuffixSupported (); 668 m_gdb_comm.GetHostInfo (); 669 m_gdb_comm.GetVContSupported ('c'); 670 return error; 671 } 672 673 void 674 ProcessGDBRemote::DidLaunchOrAttach () 675 { 676 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 677 if (log) 678 log->Printf ("ProcessGDBRemote::DidLaunch()"); 679 if (GetID() != LLDB_INVALID_PROCESS_ID) 680 { 681 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 682 683 BuildDynamicRegisterInfo (false); 684 685 // See if the GDB server supports the qHostInfo information 686 687 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 688 if (gdb_remote_arch.IsValid()) 689 { 690 ArchSpec &target_arch = GetTarget().GetArchitecture(); 691 692 if (target_arch.IsValid()) 693 { 694 // If the remote host is ARM and we have apple as the vendor, then 695 // ARM executables and shared libraries can have mixed ARM architectures. 696 // You can have an armv6 executable, and if the host is armv7, then the 697 // system will load the best possible architecture for all shared libraries 698 // it has, so we really need to take the remote host architecture as our 699 // defacto architecture in this case. 700 701 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 702 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 703 { 704 target_arch = gdb_remote_arch; 705 } 706 else 707 { 708 // Fill in what is missing in the triple 709 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 710 llvm::Triple &target_triple = target_arch.GetTriple(); 711 if (target_triple.getVendorName().size() == 0) 712 { 713 target_triple.setVendor (remote_triple.getVendor()); 714 715 if (target_triple.getOSName().size() == 0) 716 { 717 target_triple.setOS (remote_triple.getOS()); 718 719 if (target_triple.getEnvironmentName().size() == 0) 720 target_triple.setEnvironment (remote_triple.getEnvironment()); 721 } 722 } 723 } 724 } 725 else 726 { 727 // The target doesn't have a valid architecture yet, set it from 728 // the architecture we got from the remote GDB server 729 target_arch = gdb_remote_arch; 730 } 731 } 732 } 733 } 734 735 void 736 ProcessGDBRemote::DidLaunch () 737 { 738 DidLaunchOrAttach (); 739 } 740 741 Error 742 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 743 { 744 Error error; 745 // Clear out and clean up from any current state 746 Clear(); 747 if (attach_pid != LLDB_INVALID_PROCESS_ID) 748 { 749 // Make sure we aren't already connected? 750 if (!m_gdb_comm.IsConnected()) 751 { 752 char host_port[128]; 753 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 754 char connect_url[128]; 755 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 756 757 error = StartDebugserverProcess (host_port); 758 759 if (error.Fail()) 760 { 761 const char *error_string = error.AsCString(); 762 if (error_string == NULL) 763 error_string = "unable to launch " DEBUGSERVER_BASENAME; 764 765 SetExitStatus (-1, error_string); 766 } 767 else 768 { 769 error = ConnectToDebugserver (connect_url); 770 } 771 } 772 773 if (error.Success()) 774 { 775 char packet[64]; 776 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%llx", attach_pid); 777 SetID (attach_pid); 778 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 779 } 780 } 781 return error; 782 } 783 784 size_t 785 ProcessGDBRemote::AttachInputReaderCallback 786 ( 787 void *baton, 788 InputReader *reader, 789 lldb::InputReaderAction notification, 790 const char *bytes, 791 size_t bytes_len 792 ) 793 { 794 if (notification == eInputReaderGotToken) 795 { 796 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 797 if (gdb_process->m_waiting_for_attach) 798 gdb_process->m_waiting_for_attach = false; 799 reader->SetIsDone(true); 800 return 1; 801 } 802 return 0; 803 } 804 805 Error 806 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch) 807 { 808 Error error; 809 // Clear out and clean up from any current state 810 Clear(); 811 812 if (process_name && process_name[0]) 813 { 814 // Make sure we aren't already connected? 815 if (!m_gdb_comm.IsConnected()) 816 { 817 char host_port[128]; 818 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 819 char connect_url[128]; 820 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 821 822 error = StartDebugserverProcess (host_port); 823 if (error.Fail()) 824 { 825 const char *error_string = error.AsCString(); 826 if (error_string == NULL) 827 error_string = "unable to launch " DEBUGSERVER_BASENAME; 828 829 SetExitStatus (-1, error_string); 830 } 831 else 832 { 833 error = ConnectToDebugserver (connect_url); 834 } 835 } 836 837 if (error.Success()) 838 { 839 StreamString packet; 840 841 if (wait_for_launch) 842 packet.PutCString("vAttachWait"); 843 else 844 packet.PutCString("vAttachName"); 845 packet.PutChar(';'); 846 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 847 848 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 849 850 } 851 } 852 return error; 853 } 854 855 856 void 857 ProcessGDBRemote::DidAttach () 858 { 859 DidLaunchOrAttach (); 860 } 861 862 Error 863 ProcessGDBRemote::WillResume () 864 { 865 m_continue_c_tids.clear(); 866 m_continue_C_tids.clear(); 867 m_continue_s_tids.clear(); 868 m_continue_S_tids.clear(); 869 return Error(); 870 } 871 872 Error 873 ProcessGDBRemote::DoResume () 874 { 875 Error error; 876 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 877 if (log) 878 log->Printf ("ProcessGDBRemote::Resume()"); 879 880 Listener listener ("gdb-remote.resume-packet-sent"); 881 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 882 { 883 StreamString continue_packet; 884 bool continue_packet_error = false; 885 if (m_gdb_comm.HasAnyVContSupport ()) 886 { 887 continue_packet.PutCString ("vCont"); 888 889 if (!m_continue_c_tids.empty()) 890 { 891 if (m_gdb_comm.GetVContSupported ('c')) 892 { 893 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) 894 continue_packet.Printf(";c:%4.4llx", *t_pos); 895 } 896 else 897 continue_packet_error = true; 898 } 899 900 if (!continue_packet_error && !m_continue_C_tids.empty()) 901 { 902 if (m_gdb_comm.GetVContSupported ('C')) 903 { 904 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) 905 continue_packet.Printf(";C%2.2x:%4.4llx", s_pos->second, s_pos->first); 906 } 907 else 908 continue_packet_error = true; 909 } 910 911 if (!continue_packet_error && !m_continue_s_tids.empty()) 912 { 913 if (m_gdb_comm.GetVContSupported ('s')) 914 { 915 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) 916 continue_packet.Printf(";s:%4.4llx", *t_pos); 917 } 918 else 919 continue_packet_error = true; 920 } 921 922 if (!continue_packet_error && !m_continue_S_tids.empty()) 923 { 924 if (m_gdb_comm.GetVContSupported ('S')) 925 { 926 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) 927 continue_packet.Printf(";S%2.2x:%4.4llx", s_pos->second, s_pos->first); 928 } 929 else 930 continue_packet_error = true; 931 } 932 933 if (continue_packet_error) 934 continue_packet.GetString().clear(); 935 } 936 else 937 continue_packet_error = true; 938 939 if (continue_packet_error) 940 { 941 // Either no vCont support, or we tried to use part of the vCont 942 // packet that wasn't supported by the remote GDB server. 943 // We need to try and make a simple packet that can do our continue 944 const size_t num_threads = GetThreadList().GetSize(); 945 const size_t num_continue_c_tids = m_continue_c_tids.size(); 946 const size_t num_continue_C_tids = m_continue_C_tids.size(); 947 const size_t num_continue_s_tids = m_continue_s_tids.size(); 948 const size_t num_continue_S_tids = m_continue_S_tids.size(); 949 if (num_continue_c_tids > 0) 950 { 951 if (num_continue_c_tids == num_threads) 952 { 953 // All threads are resuming... 954 m_gdb_comm.SetCurrentThreadForRun (-1); 955 continue_packet.PutChar ('c'); 956 continue_packet_error = false; 957 } 958 else if (num_continue_c_tids == 1 && 959 num_continue_C_tids == 0 && 960 num_continue_s_tids == 0 && 961 num_continue_S_tids == 0 ) 962 { 963 // Only one thread is continuing 964 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 965 continue_packet.PutChar ('c'); 966 continue_packet_error = false; 967 } 968 } 969 970 if (continue_packet_error && num_continue_C_tids > 0) 971 { 972 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 973 num_continue_C_tids > 0 && 974 num_continue_s_tids == 0 && 975 num_continue_S_tids == 0 ) 976 { 977 const int continue_signo = m_continue_C_tids.front().second; 978 // Only one thread is continuing 979 if (num_continue_C_tids > 1) 980 { 981 // More that one thread with a signal, yet we don't have 982 // vCont support and we are being asked to resume each 983 // thread with a signal, we need to make sure they are 984 // all the same signal, or we can't issue the continue 985 // accurately with the current support... 986 if (num_continue_C_tids > 1) 987 { 988 continue_packet_error = false; 989 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 990 { 991 if (m_continue_C_tids[i].second != continue_signo) 992 continue_packet_error = true; 993 } 994 } 995 if (!continue_packet_error) 996 m_gdb_comm.SetCurrentThreadForRun (-1); 997 } 998 else 999 { 1000 // Set the continue thread ID 1001 continue_packet_error = false; 1002 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1003 } 1004 if (!continue_packet_error) 1005 { 1006 // Add threads continuing with the same signo... 1007 continue_packet.Printf("C%2.2x", continue_signo); 1008 } 1009 } 1010 } 1011 1012 if (continue_packet_error && num_continue_s_tids > 0) 1013 { 1014 if (num_continue_s_tids == num_threads) 1015 { 1016 // All threads are resuming... 1017 m_gdb_comm.SetCurrentThreadForRun (-1); 1018 continue_packet.PutChar ('s'); 1019 continue_packet_error = false; 1020 } 1021 else if (num_continue_c_tids == 0 && 1022 num_continue_C_tids == 0 && 1023 num_continue_s_tids == 1 && 1024 num_continue_S_tids == 0 ) 1025 { 1026 // Only one thread is stepping 1027 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1028 continue_packet.PutChar ('s'); 1029 continue_packet_error = false; 1030 } 1031 } 1032 1033 if (!continue_packet_error && num_continue_S_tids > 0) 1034 { 1035 if (num_continue_S_tids == num_threads) 1036 { 1037 const int step_signo = m_continue_S_tids.front().second; 1038 // Are all threads trying to step with the same signal? 1039 continue_packet_error = false; 1040 if (num_continue_S_tids > 1) 1041 { 1042 for (size_t i=1; i<num_threads; ++i) 1043 { 1044 if (m_continue_S_tids[i].second != step_signo) 1045 continue_packet_error = true; 1046 } 1047 } 1048 if (!continue_packet_error) 1049 { 1050 // Add threads stepping with the same signo... 1051 m_gdb_comm.SetCurrentThreadForRun (-1); 1052 continue_packet.Printf("S%2.2x", step_signo); 1053 } 1054 } 1055 else if (num_continue_c_tids == 0 && 1056 num_continue_C_tids == 0 && 1057 num_continue_s_tids == 0 && 1058 num_continue_S_tids == 1 ) 1059 { 1060 // Only one thread is stepping with signal 1061 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1062 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1063 continue_packet_error = false; 1064 } 1065 } 1066 } 1067 1068 if (continue_packet_error) 1069 { 1070 error.SetErrorString ("can't make continue packet for this resume"); 1071 } 1072 else 1073 { 1074 EventSP event_sp; 1075 TimeValue timeout; 1076 timeout = TimeValue::Now(); 1077 timeout.OffsetWithSeconds (5); 1078 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1079 1080 if (listener.WaitForEvent (&timeout, event_sp) == false) 1081 error.SetErrorString("Resume timed out."); 1082 } 1083 } 1084 1085 return error; 1086 } 1087 1088 uint32_t 1089 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1090 { 1091 // locker will keep a mutex locked until it goes out of scope 1092 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1093 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1094 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1095 // Update the thread list's stop id immediately so we don't recurse into this function. 1096 1097 std::vector<lldb::tid_t> thread_ids; 1098 bool sequence_mutex_unavailable = false; 1099 const size_t num_thread_ids = m_gdb_comm.GetCurrentThreadIDs (thread_ids, sequence_mutex_unavailable); 1100 if (num_thread_ids > 0) 1101 { 1102 for (size_t i=0; i<num_thread_ids; ++i) 1103 { 1104 tid_t tid = thread_ids[i]; 1105 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1106 if (!thread_sp) 1107 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1108 new_thread_list.AddThread(thread_sp); 1109 } 1110 } 1111 1112 if (sequence_mutex_unavailable == false) 1113 SetThreadStopInfo (m_last_stop_packet); 1114 return new_thread_list.GetSize(false); 1115 } 1116 1117 1118 StateType 1119 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1120 { 1121 stop_packet.SetFilePos (0); 1122 const char stop_type = stop_packet.GetChar(); 1123 switch (stop_type) 1124 { 1125 case 'T': 1126 case 'S': 1127 { 1128 if (GetStopID() == 0) 1129 { 1130 // Our first stop, make sure we have a process ID, and also make 1131 // sure we know about our registers 1132 if (GetID() == LLDB_INVALID_PROCESS_ID) 1133 { 1134 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1135 if (pid != LLDB_INVALID_PROCESS_ID) 1136 SetID (pid); 1137 } 1138 BuildDynamicRegisterInfo (true); 1139 } 1140 // Stop with signal and thread info 1141 const uint8_t signo = stop_packet.GetHexU8(); 1142 std::string name; 1143 std::string value; 1144 std::string thread_name; 1145 std::string reason; 1146 std::string description; 1147 uint32_t exc_type = 0; 1148 std::vector<addr_t> exc_data; 1149 uint32_t tid = LLDB_INVALID_THREAD_ID; 1150 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1151 uint32_t exc_data_count = 0; 1152 ThreadSP thread_sp; 1153 1154 while (stop_packet.GetNameColonValue(name, value)) 1155 { 1156 if (name.compare("metype") == 0) 1157 { 1158 // exception type in big endian hex 1159 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1160 } 1161 else if (name.compare("mecount") == 0) 1162 { 1163 // exception count in big endian hex 1164 exc_data_count = Args::StringToUInt32 (value.c_str(), 0, 16); 1165 } 1166 else if (name.compare("medata") == 0) 1167 { 1168 // exception data in big endian hex 1169 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1170 } 1171 else if (name.compare("thread") == 0) 1172 { 1173 // thread in big endian hex 1174 tid = Args::StringToUInt32 (value.c_str(), 0, 16); 1175 // m_thread_list does have its own mutex, but we need to 1176 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1177 // and the m_thread_list.AddThread(...) so it doesn't change on us 1178 Mutex::Locker locker (m_thread_list.GetMutex ()); 1179 thread_sp = m_thread_list.FindThreadByID(tid, false); 1180 if (!thread_sp) 1181 { 1182 // Create the thread if we need to 1183 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1184 m_thread_list.AddThread(thread_sp); 1185 } 1186 } 1187 else if (name.compare("hexname") == 0) 1188 { 1189 StringExtractor name_extractor; 1190 // Swap "value" over into "name_extractor" 1191 name_extractor.GetStringRef().swap(value); 1192 // Now convert the HEX bytes into a string value 1193 name_extractor.GetHexByteString (value); 1194 thread_name.swap (value); 1195 } 1196 else if (name.compare("name") == 0) 1197 { 1198 thread_name.swap (value); 1199 } 1200 else if (name.compare("qaddr") == 0) 1201 { 1202 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1203 } 1204 else if (name.compare("reason") == 0) 1205 { 1206 reason.swap(value); 1207 } 1208 else if (name.compare("description") == 0) 1209 { 1210 StringExtractor desc_extractor; 1211 // Swap "value" over into "name_extractor" 1212 desc_extractor.GetStringRef().swap(value); 1213 // Now convert the HEX bytes into a string value 1214 desc_extractor.GetHexByteString (thread_name); 1215 } 1216 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1217 { 1218 // We have a register number that contains an expedited 1219 // register value. Lets supply this register to our thread 1220 // so it won't have to go and read it. 1221 if (thread_sp) 1222 { 1223 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1224 1225 if (reg != UINT32_MAX) 1226 { 1227 StringExtractor reg_value_extractor; 1228 // Swap "value" over into "reg_value_extractor" 1229 reg_value_extractor.GetStringRef().swap(value); 1230 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1231 { 1232 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1233 name.c_str(), 1234 reg, 1235 reg, 1236 reg_value_extractor.GetStringRef().c_str(), 1237 stop_packet.GetStringRef().c_str()); 1238 } 1239 } 1240 } 1241 } 1242 } 1243 1244 if (thread_sp) 1245 { 1246 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1247 1248 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1249 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1250 if (exc_type != 0) 1251 { 1252 const size_t exc_data_size = exc_data.size(); 1253 1254 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1255 exc_type, 1256 exc_data_size, 1257 exc_data_size >= 1 ? exc_data[0] : 0, 1258 exc_data_size >= 2 ? exc_data[1] : 0, 1259 exc_data_size >= 3 ? exc_data[2] : 0)); 1260 } 1261 else 1262 { 1263 bool handled = false; 1264 if (!reason.empty()) 1265 { 1266 if (reason.compare("trace") == 0) 1267 { 1268 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1269 handled = true; 1270 } 1271 else if (reason.compare("breakpoint") == 0) 1272 { 1273 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1274 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess().GetBreakpointSiteList().FindByAddress(pc); 1275 if (bp_site_sp) 1276 { 1277 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1278 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1279 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1280 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1281 { 1282 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1283 handled = true; 1284 } 1285 } 1286 1287 if (!handled) 1288 { 1289 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1290 } 1291 } 1292 else if (reason.compare("trap") == 0) 1293 { 1294 // Let the trap just use the standard signal stop reason below... 1295 } 1296 else if (reason.compare("watchpoint") == 0) 1297 { 1298 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1299 // TODO: locate the watchpoint somehow... 1300 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1301 handled = true; 1302 } 1303 else if (reason.compare("exception") == 0) 1304 { 1305 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1306 handled = true; 1307 } 1308 } 1309 1310 if (signo) 1311 { 1312 if (signo == SIGTRAP) 1313 { 1314 // Currently we are going to assume SIGTRAP means we are either 1315 // hitting a breakpoint or hardware single stepping. 1316 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1317 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess().GetBreakpointSiteList().FindByAddress(pc); 1318 if (bp_site_sp) 1319 { 1320 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1321 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1322 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1323 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1324 { 1325 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1326 handled = true; 1327 } 1328 } 1329 if (!handled) 1330 { 1331 // TODO: check for breakpoint or trap opcode in case there is a hard 1332 // coded software trap 1333 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1334 handled = true; 1335 } 1336 } 1337 if (!handled) 1338 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1339 } 1340 else 1341 { 1342 StopInfoSP invalid_stop_info_sp; 1343 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1344 } 1345 1346 if (!description.empty()) 1347 { 1348 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1349 if (stop_info_sp) 1350 { 1351 stop_info_sp->SetDescription (description.c_str()); 1352 } 1353 else 1354 { 1355 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1356 } 1357 } 1358 } 1359 } 1360 return eStateStopped; 1361 } 1362 break; 1363 1364 case 'W': 1365 // process exited 1366 return eStateExited; 1367 1368 default: 1369 break; 1370 } 1371 return eStateInvalid; 1372 } 1373 1374 void 1375 ProcessGDBRemote::RefreshStateAfterStop () 1376 { 1377 // Let all threads recover from stopping and do any clean up based 1378 // on the previous thread state (if any). 1379 m_thread_list.RefreshStateAfterStop(); 1380 SetThreadStopInfo (m_last_stop_packet); 1381 } 1382 1383 Error 1384 ProcessGDBRemote::DoHalt (bool &caused_stop) 1385 { 1386 Error error; 1387 1388 bool timed_out = false; 1389 Mutex::Locker locker; 1390 1391 if (m_public_state.GetValue() == eStateAttaching) 1392 { 1393 // We are being asked to halt during an attach. We need to just close 1394 // our file handle and debugserver will go away, and we can be done... 1395 m_gdb_comm.Disconnect(); 1396 } 1397 else 1398 { 1399 if (!m_gdb_comm.SendInterrupt (locker, 2, caused_stop, timed_out)) 1400 { 1401 if (timed_out) 1402 error.SetErrorString("timed out sending interrupt packet"); 1403 else 1404 error.SetErrorString("unknown error sending interrupt packet"); 1405 } 1406 } 1407 return error; 1408 } 1409 1410 Error 1411 ProcessGDBRemote::InterruptIfRunning 1412 ( 1413 bool discard_thread_plans, 1414 bool catch_stop_event, 1415 EventSP &stop_event_sp 1416 ) 1417 { 1418 Error error; 1419 1420 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1421 1422 bool paused_private_state_thread = false; 1423 const bool is_running = m_gdb_comm.IsRunning(); 1424 if (log) 1425 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1426 discard_thread_plans, 1427 catch_stop_event, 1428 is_running); 1429 1430 if (discard_thread_plans) 1431 { 1432 if (log) 1433 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1434 m_thread_list.DiscardThreadPlans(); 1435 } 1436 if (is_running) 1437 { 1438 if (catch_stop_event) 1439 { 1440 if (log) 1441 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1442 PausePrivateStateThread(); 1443 paused_private_state_thread = true; 1444 } 1445 1446 bool timed_out = false; 1447 bool sent_interrupt = false; 1448 Mutex::Locker locker; 1449 1450 if (!m_gdb_comm.SendInterrupt (locker, 1, sent_interrupt, timed_out)) 1451 { 1452 if (timed_out) 1453 error.SetErrorString("timed out sending interrupt packet"); 1454 else 1455 error.SetErrorString("unknown error sending interrupt packet"); 1456 if (paused_private_state_thread) 1457 ResumePrivateStateThread(); 1458 return error; 1459 } 1460 1461 if (catch_stop_event) 1462 { 1463 // LISTEN HERE 1464 TimeValue timeout_time; 1465 timeout_time = TimeValue::Now(); 1466 timeout_time.OffsetWithSeconds(5); 1467 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1468 1469 timed_out = state == eStateInvalid; 1470 if (log) 1471 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1472 1473 if (timed_out) 1474 error.SetErrorString("unable to verify target stopped"); 1475 } 1476 1477 if (paused_private_state_thread) 1478 { 1479 if (log) 1480 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1481 ResumePrivateStateThread(); 1482 } 1483 } 1484 return error; 1485 } 1486 1487 Error 1488 ProcessGDBRemote::WillDetach () 1489 { 1490 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1491 if (log) 1492 log->Printf ("ProcessGDBRemote::WillDetach()"); 1493 1494 bool discard_thread_plans = true; 1495 bool catch_stop_event = true; 1496 EventSP event_sp; 1497 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1498 } 1499 1500 Error 1501 ProcessGDBRemote::DoDetach() 1502 { 1503 Error error; 1504 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1505 if (log) 1506 log->Printf ("ProcessGDBRemote::DoDetach()"); 1507 1508 DisableAllBreakpointSites (); 1509 1510 m_thread_list.DiscardThreadPlans(); 1511 1512 size_t response_size = m_gdb_comm.SendPacket ("D", 1); 1513 if (log) 1514 { 1515 if (response_size) 1516 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1517 else 1518 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1519 } 1520 // Sleep for one second to let the process get all detached... 1521 StopAsyncThread (); 1522 1523 SetPrivateState (eStateDetached); 1524 ResumePrivateStateThread(); 1525 1526 //KillDebugserverProcess (); 1527 return error; 1528 } 1529 1530 Error 1531 ProcessGDBRemote::DoDestroy () 1532 { 1533 Error error; 1534 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1535 if (log) 1536 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1537 1538 // Interrupt if our inferior is running... 1539 if (m_gdb_comm.IsConnected()) 1540 { 1541 if (m_public_state.GetValue() != eStateAttaching) 1542 { 1543 1544 StringExtractorGDBRemote response; 1545 bool send_async = true; 1546 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1547 { 1548 char packet_cmd = response.GetChar(0); 1549 1550 if (packet_cmd == 'W' || packet_cmd == 'X') 1551 { 1552 SetLastStopPacket (response); 1553 SetExitStatus(response.GetHexU8(), NULL); 1554 } 1555 } 1556 else 1557 { 1558 SetExitStatus(SIGABRT, NULL); 1559 //error.SetErrorString("kill packet failed"); 1560 } 1561 } 1562 } 1563 StopAsyncThread (); 1564 KillDebugserverProcess (); 1565 return error; 1566 } 1567 1568 //------------------------------------------------------------------ 1569 // Process Queries 1570 //------------------------------------------------------------------ 1571 1572 bool 1573 ProcessGDBRemote::IsAlive () 1574 { 1575 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1576 } 1577 1578 addr_t 1579 ProcessGDBRemote::GetImageInfoAddress() 1580 { 1581 if (!m_gdb_comm.IsRunning()) 1582 { 1583 StringExtractorGDBRemote response; 1584 if (m_gdb_comm.SendPacketAndWaitForResponse("qShlibInfoAddr", ::strlen ("qShlibInfoAddr"), response, false)) 1585 { 1586 if (response.IsNormalResponse()) 1587 return response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS); 1588 } 1589 } 1590 return LLDB_INVALID_ADDRESS; 1591 } 1592 1593 //------------------------------------------------------------------ 1594 // Process Memory 1595 //------------------------------------------------------------------ 1596 size_t 1597 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1598 { 1599 if (size > m_max_memory_size) 1600 { 1601 // Keep memory read sizes down to a sane limit. This function will be 1602 // called multiple times in order to complete the task by 1603 // lldb_private::Process so it is ok to do this. 1604 size = m_max_memory_size; 1605 } 1606 1607 char packet[64]; 1608 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%zx", (uint64_t)addr, size); 1609 assert (packet_len + 1 < sizeof(packet)); 1610 StringExtractorGDBRemote response; 1611 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1612 { 1613 if (response.IsNormalResponse()) 1614 { 1615 error.Clear(); 1616 return response.GetHexBytes(buf, size, '\xdd'); 1617 } 1618 else if (response.IsErrorResponse()) 1619 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1620 else if (response.IsUnsupportedResponse()) 1621 error.SetErrorStringWithFormat("'%s' packet unsupported", packet); 1622 else 1623 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet, response.GetStringRef().c_str()); 1624 } 1625 else 1626 { 1627 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1628 } 1629 return 0; 1630 } 1631 1632 size_t 1633 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1634 { 1635 if (size > m_max_memory_size) 1636 { 1637 // Keep memory read sizes down to a sane limit. This function will be 1638 // called multiple times in order to complete the task by 1639 // lldb_private::Process so it is ok to do this. 1640 size = m_max_memory_size; 1641 } 1642 1643 StreamString packet; 1644 packet.Printf("M%llx,%zx:", addr, size); 1645 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1646 StringExtractorGDBRemote response; 1647 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1648 { 1649 if (response.IsOKResponse()) 1650 { 1651 error.Clear(); 1652 return size; 1653 } 1654 else if (response.IsErrorResponse()) 1655 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1656 else if (response.IsUnsupportedResponse()) 1657 error.SetErrorStringWithFormat("'%s' packet unsupported", packet.GetString().c_str()); 1658 else 1659 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1660 } 1661 else 1662 { 1663 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1664 } 1665 return 0; 1666 } 1667 1668 lldb::addr_t 1669 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1670 { 1671 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1672 1673 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1674 switch (supported) 1675 { 1676 case eLazyBoolCalculate: 1677 case eLazyBoolYes: 1678 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1679 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1680 return allocated_addr; 1681 1682 case eLazyBoolNo: 1683 // Call mmap() to create memory in the inferior.. 1684 unsigned prot = 0; 1685 if (permissions & lldb::ePermissionsReadable) 1686 prot |= eMmapProtRead; 1687 if (permissions & lldb::ePermissionsWritable) 1688 prot |= eMmapProtWrite; 1689 if (permissions & lldb::ePermissionsExecutable) 1690 prot |= eMmapProtExec; 1691 1692 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 1693 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 1694 m_addr_to_mmap_size[allocated_addr] = size; 1695 else 1696 allocated_addr = LLDB_INVALID_ADDRESS; 1697 break; 1698 } 1699 1700 if (allocated_addr == LLDB_INVALID_ADDRESS) 1701 error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); 1702 else 1703 error.Clear(); 1704 return allocated_addr; 1705 } 1706 1707 Error 1708 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 1709 MemoryRegionInfo ®ion_info) 1710 { 1711 1712 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 1713 return error; 1714 } 1715 1716 Error 1717 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 1718 { 1719 Error error; 1720 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1721 1722 switch (supported) 1723 { 1724 case eLazyBoolCalculate: 1725 // We should never be deallocating memory without allocating memory 1726 // first so we should never get eLazyBoolCalculate 1727 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 1728 break; 1729 1730 case eLazyBoolYes: 1731 if (!m_gdb_comm.DeallocateMemory (addr)) 1732 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1733 break; 1734 1735 case eLazyBoolNo: 1736 // Call munmap() to deallocate memory in the inferior.. 1737 { 1738 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 1739 if (pos != m_addr_to_mmap_size.end() && 1740 InferiorCallMunmap(this, addr, pos->second)) 1741 m_addr_to_mmap_size.erase (pos); 1742 else 1743 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1744 } 1745 break; 1746 } 1747 1748 return error; 1749 } 1750 1751 1752 //------------------------------------------------------------------ 1753 // Process STDIO 1754 //------------------------------------------------------------------ 1755 size_t 1756 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 1757 { 1758 if (m_stdio_communication.IsConnected()) 1759 { 1760 ConnectionStatus status; 1761 m_stdio_communication.Write(src, src_len, status, NULL); 1762 } 1763 return 0; 1764 } 1765 1766 Error 1767 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 1768 { 1769 Error error; 1770 assert (bp_site != NULL); 1771 1772 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1773 user_id_t site_id = bp_site->GetID(); 1774 const addr_t addr = bp_site->GetLoadAddress(); 1775 if (log) 1776 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 1777 1778 if (bp_site->IsEnabled()) 1779 { 1780 if (log) 1781 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 1782 return error; 1783 } 1784 else 1785 { 1786 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1787 1788 if (bp_site->HardwarePreferred()) 1789 { 1790 // Try and set hardware breakpoint, and if that fails, fall through 1791 // and set a software breakpoint? 1792 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 1793 { 1794 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 1795 { 1796 bp_site->SetEnabled(true); 1797 bp_site->SetType (BreakpointSite::eHardware); 1798 return error; 1799 } 1800 } 1801 } 1802 1803 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 1804 { 1805 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 1806 { 1807 bp_site->SetEnabled(true); 1808 bp_site->SetType (BreakpointSite::eExternal); 1809 return error; 1810 } 1811 } 1812 1813 return EnableSoftwareBreakpoint (bp_site); 1814 } 1815 1816 if (log) 1817 { 1818 const char *err_string = error.AsCString(); 1819 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 1820 bp_site->GetLoadAddress(), 1821 err_string ? err_string : "NULL"); 1822 } 1823 // We shouldn't reach here on a successful breakpoint enable... 1824 if (error.Success()) 1825 error.SetErrorToGenericError(); 1826 return error; 1827 } 1828 1829 Error 1830 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 1831 { 1832 Error error; 1833 assert (bp_site != NULL); 1834 addr_t addr = bp_site->GetLoadAddress(); 1835 user_id_t site_id = bp_site->GetID(); 1836 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1837 if (log) 1838 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 1839 1840 if (bp_site->IsEnabled()) 1841 { 1842 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1843 1844 BreakpointSite::Type bp_type = bp_site->GetType(); 1845 switch (bp_type) 1846 { 1847 case BreakpointSite::eSoftware: 1848 error = DisableSoftwareBreakpoint (bp_site); 1849 break; 1850 1851 case BreakpointSite::eHardware: 1852 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 1853 error.SetErrorToGenericError(); 1854 break; 1855 1856 case BreakpointSite::eExternal: 1857 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 1858 error.SetErrorToGenericError(); 1859 break; 1860 } 1861 if (error.Success()) 1862 bp_site->SetEnabled(false); 1863 } 1864 else 1865 { 1866 if (log) 1867 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 1868 return error; 1869 } 1870 1871 if (error.Success()) 1872 error.SetErrorToGenericError(); 1873 return error; 1874 } 1875 1876 // Pre-requisite: wp != NULL. 1877 static GDBStoppointType 1878 GetGDBStoppointType (Watchpoint *wp) 1879 { 1880 assert(wp); 1881 bool watch_read = wp->WatchpointRead(); 1882 bool watch_write = wp->WatchpointWrite(); 1883 1884 // watch_read and watch_write cannot both be false. 1885 assert(watch_read || watch_write); 1886 if (watch_read && watch_write) 1887 return eWatchpointReadWrite; 1888 else if (watch_read) 1889 return eWatchpointRead; 1890 else // Must be watch_write, then. 1891 return eWatchpointWrite; 1892 } 1893 1894 Error 1895 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 1896 { 1897 Error error; 1898 if (wp) 1899 { 1900 user_id_t watchID = wp->GetID(); 1901 addr_t addr = wp->GetLoadAddress(); 1902 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 1903 if (log) 1904 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 1905 if (wp->IsEnabled()) 1906 { 1907 if (log) 1908 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 1909 return error; 1910 } 1911 1912 GDBStoppointType type = GetGDBStoppointType(wp); 1913 // Pass down an appropriate z/Z packet... 1914 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 1915 { 1916 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 1917 { 1918 wp->SetEnabled(true); 1919 return error; 1920 } 1921 else 1922 error.SetErrorString("sending gdb watchpoint packet failed"); 1923 } 1924 else 1925 error.SetErrorString("watchpoints not supported"); 1926 } 1927 else 1928 { 1929 error.SetErrorString("Watchpoint argument was NULL."); 1930 } 1931 if (error.Success()) 1932 error.SetErrorToGenericError(); 1933 return error; 1934 } 1935 1936 Error 1937 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 1938 { 1939 Error error; 1940 if (wp) 1941 { 1942 user_id_t watchID = wp->GetID(); 1943 1944 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 1945 1946 addr_t addr = wp->GetLoadAddress(); 1947 if (log) 1948 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 1949 1950 if (!wp->IsEnabled()) 1951 { 1952 if (log) 1953 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 1954 return error; 1955 } 1956 1957 if (wp->IsHardware()) 1958 { 1959 GDBStoppointType type = GetGDBStoppointType(wp); 1960 // Pass down an appropriate z/Z packet... 1961 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 1962 { 1963 wp->SetEnabled(false); 1964 return error; 1965 } 1966 else 1967 error.SetErrorString("sending gdb watchpoint packet failed"); 1968 } 1969 // TODO: clear software watchpoints if we implement them 1970 } 1971 else 1972 { 1973 error.SetErrorString("Watchpoint argument was NULL."); 1974 } 1975 if (error.Success()) 1976 error.SetErrorToGenericError(); 1977 return error; 1978 } 1979 1980 void 1981 ProcessGDBRemote::Clear() 1982 { 1983 m_flags = 0; 1984 m_thread_list.Clear(); 1985 } 1986 1987 Error 1988 ProcessGDBRemote::DoSignal (int signo) 1989 { 1990 Error error; 1991 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1992 if (log) 1993 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 1994 1995 if (!m_gdb_comm.SendAsyncSignal (signo)) 1996 error.SetErrorStringWithFormat("failed to send signal %i", signo); 1997 return error; 1998 } 1999 2000 Error 2001 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2002 { 2003 Error error; 2004 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2005 { 2006 // If we locate debugserver, keep that located version around 2007 static FileSpec g_debugserver_file_spec; 2008 2009 ProcessLaunchInfo launch_info; 2010 char debugserver_path[PATH_MAX]; 2011 FileSpec &debugserver_file_spec = launch_info.GetExecutableFile(); 2012 2013 // Always check to see if we have an environment override for the path 2014 // to the debugserver to use and use it if we do. 2015 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2016 if (env_debugserver_path) 2017 debugserver_file_spec.SetFile (env_debugserver_path, false); 2018 else 2019 debugserver_file_spec = g_debugserver_file_spec; 2020 bool debugserver_exists = debugserver_file_spec.Exists(); 2021 if (!debugserver_exists) 2022 { 2023 // The debugserver binary is in the LLDB.framework/Resources 2024 // directory. 2025 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2026 { 2027 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2028 debugserver_exists = debugserver_file_spec.Exists(); 2029 if (debugserver_exists) 2030 { 2031 g_debugserver_file_spec = debugserver_file_spec; 2032 } 2033 else 2034 { 2035 g_debugserver_file_spec.Clear(); 2036 debugserver_file_spec.Clear(); 2037 } 2038 } 2039 } 2040 2041 if (debugserver_exists) 2042 { 2043 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2044 2045 m_stdio_communication.Clear(); 2046 2047 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2048 2049 Args &debugserver_args = launch_info.GetArguments(); 2050 char arg_cstr[PATH_MAX]; 2051 2052 // Start args with "debugserver /file/path -r --" 2053 debugserver_args.AppendArgument(debugserver_path); 2054 debugserver_args.AppendArgument(debugserver_url); 2055 // use native registers, not the GDB registers 2056 debugserver_args.AppendArgument("--native-regs"); 2057 // make debugserver run in its own session so signals generated by 2058 // special terminal key sequences (^C) don't affect debugserver 2059 debugserver_args.AppendArgument("--setsid"); 2060 2061 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2062 if (env_debugserver_log_file) 2063 { 2064 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2065 debugserver_args.AppendArgument(arg_cstr); 2066 } 2067 2068 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2069 if (env_debugserver_log_flags) 2070 { 2071 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2072 debugserver_args.AppendArgument(arg_cstr); 2073 } 2074 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2075 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2076 2077 // We currently send down all arguments, attach pids, or attach 2078 // process names in dedicated GDB server packets, so we don't need 2079 // to pass them as arguments. This is currently because of all the 2080 // things we need to setup prior to launching: the environment, 2081 // current working dir, file actions, etc. 2082 #if 0 2083 // Now append the program arguments 2084 if (inferior_argv) 2085 { 2086 // Terminate the debugserver args so we can now append the inferior args 2087 debugserver_args.AppendArgument("--"); 2088 2089 for (int i = 0; inferior_argv[i] != NULL; ++i) 2090 debugserver_args.AppendArgument (inferior_argv[i]); 2091 } 2092 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2093 { 2094 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2095 debugserver_args.AppendArgument (arg_cstr); 2096 } 2097 else if (attach_name && attach_name[0]) 2098 { 2099 if (wait_for_launch) 2100 debugserver_args.AppendArgument ("--waitfor"); 2101 else 2102 debugserver_args.AppendArgument ("--attach"); 2103 debugserver_args.AppendArgument (attach_name); 2104 } 2105 #endif 2106 2107 ProcessLaunchInfo::FileAction file_action; 2108 2109 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2110 // to "/dev/null" if we run into any problems. 2111 file_action.Close (STDIN_FILENO); 2112 launch_info.AppendFileAction (file_action); 2113 file_action.Close (STDOUT_FILENO); 2114 launch_info.AppendFileAction (file_action); 2115 file_action.Close (STDERR_FILENO); 2116 launch_info.AppendFileAction (file_action); 2117 2118 if (log) 2119 { 2120 StreamString strm; 2121 debugserver_args.Dump (&strm); 2122 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2123 } 2124 2125 launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2126 2127 error = Host::LaunchProcess(launch_info); 2128 2129 if (error.Success ()) 2130 m_debugserver_pid = launch_info.GetProcessID(); 2131 else 2132 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2133 2134 if (error.Fail() || log) 2135 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%llu, path='%s'", m_debugserver_pid, debugserver_path); 2136 } 2137 else 2138 { 2139 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2140 } 2141 2142 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2143 StartAsyncThread (); 2144 } 2145 return error; 2146 } 2147 2148 bool 2149 ProcessGDBRemote::MonitorDebugserverProcess 2150 ( 2151 void *callback_baton, 2152 lldb::pid_t debugserver_pid, 2153 bool exited, // True if the process did exit 2154 int signo, // Zero for no signal 2155 int exit_status // Exit value of process if signal is zero 2156 ) 2157 { 2158 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2159 // and might not exist anymore, so we need to carefully try to get the 2160 // target for this process first since we have a race condition when 2161 // we are done running between getting the notice that the inferior 2162 // process has died and the debugserver that was debugging this process. 2163 // In our test suite, we are also continually running process after 2164 // process, so we must be very careful to make sure: 2165 // 1 - process object hasn't been deleted already 2166 // 2 - that a new process object hasn't been recreated in its place 2167 2168 // "debugserver_pid" argument passed in is the process ID for 2169 // debugserver that we are tracking... 2170 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2171 2172 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2173 2174 // Get a shared pointer to the target that has a matching process pointer. 2175 // This target could be gone, or the target could already have a new process 2176 // object inside of it 2177 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2178 2179 if (log) 2180 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%llu, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2181 2182 if (target_sp) 2183 { 2184 // We found a process in a target that matches, but another thread 2185 // might be in the process of launching a new process that will 2186 // soon replace it, so get a shared pointer to the process so we 2187 // can keep it alive. 2188 ProcessSP process_sp (target_sp->GetProcessSP()); 2189 // Now we have a shared pointer to the process that can't go away on us 2190 // so we now make sure it was the same as the one passed in, and also make 2191 // sure that our previous "process *" didn't get deleted and have a new 2192 // "process *" created in its place with the same pointer. To verify this 2193 // we make sure the process has our debugserver process ID. If we pass all 2194 // of these tests, then we are sure that this process is the one we were 2195 // looking for. 2196 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2197 { 2198 // Sleep for a half a second to make sure our inferior process has 2199 // time to set its exit status before we set it incorrectly when 2200 // both the debugserver and the inferior process shut down. 2201 usleep (500000); 2202 // If our process hasn't yet exited, debugserver might have died. 2203 // If the process did exit, the we are reaping it. 2204 const StateType state = process->GetState(); 2205 2206 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2207 state != eStateInvalid && 2208 state != eStateUnloaded && 2209 state != eStateExited && 2210 state != eStateDetached) 2211 { 2212 char error_str[1024]; 2213 if (signo) 2214 { 2215 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2216 if (signal_cstr) 2217 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2218 else 2219 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2220 } 2221 else 2222 { 2223 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2224 } 2225 2226 process->SetExitStatus (-1, error_str); 2227 } 2228 // Debugserver has exited we need to let our ProcessGDBRemote 2229 // know that it no longer has a debugserver instance 2230 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2231 } 2232 } 2233 return true; 2234 } 2235 2236 void 2237 ProcessGDBRemote::KillDebugserverProcess () 2238 { 2239 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2240 { 2241 ::kill (m_debugserver_pid, SIGINT); 2242 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2243 } 2244 } 2245 2246 void 2247 ProcessGDBRemote::Initialize() 2248 { 2249 static bool g_initialized = false; 2250 2251 if (g_initialized == false) 2252 { 2253 g_initialized = true; 2254 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2255 GetPluginDescriptionStatic(), 2256 CreateInstance); 2257 2258 Log::Callbacks log_callbacks = { 2259 ProcessGDBRemoteLog::DisableLog, 2260 ProcessGDBRemoteLog::EnableLog, 2261 ProcessGDBRemoteLog::ListLogCategories 2262 }; 2263 2264 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2265 } 2266 } 2267 2268 bool 2269 ProcessGDBRemote::StartAsyncThread () 2270 { 2271 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2272 2273 if (log) 2274 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2275 2276 // Create a thread that watches our internal state and controls which 2277 // events make it to clients (into the DCProcess event queue). 2278 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2279 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2280 } 2281 2282 void 2283 ProcessGDBRemote::StopAsyncThread () 2284 { 2285 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2286 2287 if (log) 2288 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2289 2290 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2291 2292 // This will shut down the async thread. 2293 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2294 2295 // Stop the stdio thread 2296 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2297 { 2298 Host::ThreadJoin (m_async_thread, NULL, NULL); 2299 } 2300 } 2301 2302 2303 void * 2304 ProcessGDBRemote::AsyncThread (void *arg) 2305 { 2306 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2307 2308 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2309 if (log) 2310 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2311 2312 Listener listener ("ProcessGDBRemote::AsyncThread"); 2313 EventSP event_sp; 2314 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2315 eBroadcastBitAsyncThreadShouldExit; 2316 2317 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2318 { 2319 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2320 2321 bool done = false; 2322 while (!done) 2323 { 2324 if (log) 2325 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2326 if (listener.WaitForEvent (NULL, event_sp)) 2327 { 2328 const uint32_t event_type = event_sp->GetType(); 2329 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2330 { 2331 if (log) 2332 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2333 2334 switch (event_type) 2335 { 2336 case eBroadcastBitAsyncContinue: 2337 { 2338 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2339 2340 if (continue_packet) 2341 { 2342 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2343 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2344 if (log) 2345 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2346 2347 if (::strstr (continue_cstr, "vAttach") == NULL) 2348 process->SetPrivateState(eStateRunning); 2349 StringExtractorGDBRemote response; 2350 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2351 2352 switch (stop_state) 2353 { 2354 case eStateStopped: 2355 case eStateCrashed: 2356 case eStateSuspended: 2357 process->SetLastStopPacket (response); 2358 process->SetPrivateState (stop_state); 2359 break; 2360 2361 case eStateExited: 2362 process->SetLastStopPacket (response); 2363 response.SetFilePos(1); 2364 process->SetExitStatus(response.GetHexU8(), NULL); 2365 done = true; 2366 break; 2367 2368 case eStateInvalid: 2369 process->SetExitStatus(-1, "lost connection"); 2370 break; 2371 2372 default: 2373 process->SetPrivateState (stop_state); 2374 break; 2375 } 2376 } 2377 } 2378 break; 2379 2380 case eBroadcastBitAsyncThreadShouldExit: 2381 if (log) 2382 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2383 done = true; 2384 break; 2385 2386 default: 2387 if (log) 2388 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2389 done = true; 2390 break; 2391 } 2392 } 2393 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2394 { 2395 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2396 { 2397 process->SetExitStatus (-1, "lost connection"); 2398 done = true; 2399 } 2400 } 2401 } 2402 else 2403 { 2404 if (log) 2405 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2406 done = true; 2407 } 2408 } 2409 } 2410 2411 if (log) 2412 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2413 2414 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2415 return NULL; 2416 } 2417 2418 const char * 2419 ProcessGDBRemote::GetDispatchQueueNameForThread 2420 ( 2421 addr_t thread_dispatch_qaddr, 2422 std::string &dispatch_queue_name 2423 ) 2424 { 2425 dispatch_queue_name.clear(); 2426 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2427 { 2428 // Cache the dispatch_queue_offsets_addr value so we don't always have 2429 // to look it up 2430 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2431 { 2432 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2433 const Symbol *dispatch_queue_offsets_symbol = NULL; 2434 ModuleSP module_sp(GetTarget().GetImages().FindFirstModuleForFileSpec (FileSpec("libSystem.B.dylib", false), NULL, NULL)); 2435 if (module_sp) 2436 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2437 2438 if (dispatch_queue_offsets_symbol == NULL) 2439 { 2440 module_sp = GetTarget().GetImages().FindFirstModuleForFileSpec (FileSpec("libdispatch.dylib", false), NULL, NULL); 2441 if (module_sp) 2442 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2443 } 2444 if (dispatch_queue_offsets_symbol) 2445 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetValue().GetLoadAddress(&m_target); 2446 2447 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2448 return NULL; 2449 } 2450 2451 uint8_t memory_buffer[8]; 2452 DataExtractor data (memory_buffer, 2453 sizeof(memory_buffer), 2454 m_target.GetArchitecture().GetByteOrder(), 2455 m_target.GetArchitecture().GetAddressByteSize()); 2456 2457 // Excerpt from src/queue_private.h 2458 struct dispatch_queue_offsets_s 2459 { 2460 uint16_t dqo_version; 2461 uint16_t dqo_label; 2462 uint16_t dqo_label_size; 2463 } dispatch_queue_offsets; 2464 2465 2466 Error error; 2467 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2468 { 2469 uint32_t data_offset = 0; 2470 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2471 { 2472 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2473 { 2474 data_offset = 0; 2475 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2476 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2477 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2478 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2479 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2480 dispatch_queue_name.erase (bytes_read); 2481 } 2482 } 2483 } 2484 } 2485 if (dispatch_queue_name.empty()) 2486 return NULL; 2487 return dispatch_queue_name.c_str(); 2488 } 2489 2490 //uint32_t 2491 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2492 //{ 2493 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2494 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2495 // if (m_local_debugserver) 2496 // { 2497 // return Host::ListProcessesMatchingName (name, matches, pids); 2498 // } 2499 // else 2500 // { 2501 // // FIXME: Implement talking to the remote debugserver. 2502 // return 0; 2503 // } 2504 // 2505 //} 2506 // 2507 bool 2508 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2509 lldb_private::StoppointCallbackContext *context, 2510 lldb::user_id_t break_id, 2511 lldb::user_id_t break_loc_id) 2512 { 2513 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2514 // run so I can stop it if that's what I want to do. 2515 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2516 if (log) 2517 log->Printf("Hit New Thread Notification breakpoint."); 2518 return false; 2519 } 2520 2521 2522 bool 2523 ProcessGDBRemote::StartNoticingNewThreads() 2524 { 2525 static const char *bp_names[] = 2526 { 2527 "start_wqthread", 2528 "_pthread_wqthread", 2529 "_pthread_start", 2530 NULL 2531 }; 2532 2533 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2534 size_t num_bps = m_thread_observation_bps.size(); 2535 if (num_bps != 0) 2536 { 2537 for (int i = 0; i < num_bps; i++) 2538 { 2539 lldb::BreakpointSP break_sp = m_target.GetBreakpointByID(m_thread_observation_bps[i]); 2540 if (break_sp) 2541 { 2542 if (log && log->GetVerbose()) 2543 log->Printf("Enabled noticing new thread breakpoint."); 2544 break_sp->SetEnabled(true); 2545 } 2546 } 2547 } 2548 else 2549 { 2550 for (int i = 0; bp_names[i] != NULL; i++) 2551 { 2552 Breakpoint *breakpoint = m_target.CreateBreakpoint (NULL, NULL, bp_names[i], eFunctionNameTypeFull, true).get(); 2553 if (breakpoint) 2554 { 2555 if (log && log->GetVerbose()) 2556 log->Printf("Successfully created new thread notification breakpoint at \"%s\".", bp_names[i]); 2557 m_thread_observation_bps.push_back(breakpoint->GetID()); 2558 breakpoint->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2559 } 2560 else 2561 { 2562 if (log) 2563 log->Printf("Failed to create new thread notification breakpoint."); 2564 return false; 2565 } 2566 } 2567 } 2568 2569 return true; 2570 } 2571 2572 bool 2573 ProcessGDBRemote::StopNoticingNewThreads() 2574 { 2575 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2576 if (log && log->GetVerbose()) 2577 log->Printf ("Disabling new thread notification breakpoint."); 2578 size_t num_bps = m_thread_observation_bps.size(); 2579 if (num_bps != 0) 2580 { 2581 for (int i = 0; i < num_bps; i++) 2582 { 2583 2584 lldb::BreakpointSP break_sp = m_target.GetBreakpointByID(m_thread_observation_bps[i]); 2585 if (break_sp) 2586 { 2587 break_sp->SetEnabled(false); 2588 } 2589 } 2590 } 2591 return true; 2592 } 2593 2594 2595