1 //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // C Includes 11 #include <errno.h> 12 #include <spawn.h> 13 #include <stdlib.h> 14 #include <sys/mman.h> // for mmap 15 #include <sys/stat.h> 16 #include <sys/types.h> 17 #include <time.h> 18 19 // C++ Includes 20 #include <algorithm> 21 #include <map> 22 23 // Other libraries and framework includes 24 25 #include "lldb/Breakpoint/Watchpoint.h" 26 #include "lldb/Interpreter/Args.h" 27 #include "lldb/Core/ArchSpec.h" 28 #include "lldb/Core/Debugger.h" 29 #include "lldb/Core/ConnectionFileDescriptor.h" 30 #include "lldb/Host/FileSpec.h" 31 #include "lldb/Core/InputReader.h" 32 #include "lldb/Core/Module.h" 33 #include "lldb/Core/PluginManager.h" 34 #include "lldb/Core/State.h" 35 #include "lldb/Core/StreamFile.h" 36 #include "lldb/Core/StreamString.h" 37 #include "lldb/Core/Timer.h" 38 #include "lldb/Core/Value.h" 39 #include "lldb/Host/TimeValue.h" 40 #include "lldb/Symbol/ObjectFile.h" 41 #include "lldb/Target/DynamicLoader.h" 42 #include "lldb/Target/Target.h" 43 #include "lldb/Target/TargetList.h" 44 #include "lldb/Target/ThreadPlanCallFunction.h" 45 #include "lldb/Utility/PseudoTerminal.h" 46 47 // Project includes 48 #include "lldb/Host/Host.h" 49 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 50 #include "Utility/StringExtractorGDBRemote.h" 51 #include "GDBRemoteRegisterContext.h" 52 #include "ProcessGDBRemote.h" 53 #include "ProcessGDBRemoteLog.h" 54 #include "ThreadGDBRemote.h" 55 #include "StopInfoMachException.h" 56 57 namespace lldb 58 { 59 // Provide a function that can easily dump the packet history if we know a 60 // ProcessGDBRemote * value (which we can get from logs or from debugging). 61 // We need the function in the lldb namespace so it makes it into the final 62 // executable since the LLDB shared library only exports stuff in the lldb 63 // namespace. This allows you to attach with a debugger and call this 64 // function and get the packet history dumped to a file. 65 void 66 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 67 { 68 lldb_private::StreamFile strm; 69 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 70 if (error.Success()) 71 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 72 } 73 } 74 75 76 #define DEBUGSERVER_BASENAME "debugserver" 77 using namespace lldb; 78 using namespace lldb_private; 79 80 static bool rand_initialized = false; 81 82 static inline uint16_t 83 get_random_port () 84 { 85 if (!rand_initialized) 86 { 87 time_t seed = time(NULL); 88 89 rand_initialized = true; 90 srand(seed); 91 } 92 return (rand() % (UINT16_MAX - 1000u)) + 1000u; 93 } 94 95 96 const char * 97 ProcessGDBRemote::GetPluginNameStatic() 98 { 99 return "gdb-remote"; 100 } 101 102 const char * 103 ProcessGDBRemote::GetPluginDescriptionStatic() 104 { 105 return "GDB Remote protocol based debugging plug-in."; 106 } 107 108 void 109 ProcessGDBRemote::Terminate() 110 { 111 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 112 } 113 114 115 lldb::ProcessSP 116 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 117 { 118 lldb::ProcessSP process_sp; 119 if (crash_file_path == NULL) 120 process_sp.reset (new ProcessGDBRemote (target, listener)); 121 return process_sp; 122 } 123 124 bool 125 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 126 { 127 if (plugin_specified_by_name) 128 return true; 129 130 // For now we are just making sure the file exists for a given module 131 Module *exe_module = target.GetExecutableModulePointer(); 132 if (exe_module) 133 { 134 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 135 // We can't debug core files... 136 switch (exe_objfile->GetType()) 137 { 138 case ObjectFile::eTypeInvalid: 139 case ObjectFile::eTypeCoreFile: 140 case ObjectFile::eTypeDebugInfo: 141 case ObjectFile::eTypeObjectFile: 142 case ObjectFile::eTypeSharedLibrary: 143 case ObjectFile::eTypeStubLibrary: 144 return false; 145 case ObjectFile::eTypeExecutable: 146 case ObjectFile::eTypeDynamicLinker: 147 case ObjectFile::eTypeUnknown: 148 break; 149 } 150 return exe_module->GetFileSpec().Exists(); 151 } 152 // However, if there is no executable module, we return true since we might be preparing to attach. 153 return true; 154 } 155 156 //---------------------------------------------------------------------- 157 // ProcessGDBRemote constructor 158 //---------------------------------------------------------------------- 159 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 160 Process (target, listener), 161 m_flags (0), 162 m_gdb_comm(false), 163 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 164 m_last_stop_packet (), 165 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 166 m_register_info (), 167 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 168 m_async_thread (LLDB_INVALID_HOST_THREAD), 169 m_thread_ids (), 170 m_continue_c_tids (), 171 m_continue_C_tids (), 172 m_continue_s_tids (), 173 m_continue_S_tids (), 174 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 175 m_max_memory_size (512), 176 m_addr_to_mmap_size (), 177 m_thread_create_bp_sp (), 178 m_waiting_for_attach (false) 179 { 180 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 181 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 182 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 183 } 184 185 //---------------------------------------------------------------------- 186 // Destructor 187 //---------------------------------------------------------------------- 188 ProcessGDBRemote::~ProcessGDBRemote() 189 { 190 // m_mach_process.UnregisterNotificationCallbacks (this); 191 Clear(); 192 // We need to call finalize on the process before destroying ourselves 193 // to make sure all of the broadcaster cleanup goes as planned. If we 194 // destruct this class, then Process::~Process() might have problems 195 // trying to fully destroy the broadcaster. 196 Finalize(); 197 } 198 199 //---------------------------------------------------------------------- 200 // PluginInterface 201 //---------------------------------------------------------------------- 202 const char * 203 ProcessGDBRemote::GetPluginName() 204 { 205 return "Process debugging plug-in that uses the GDB remote protocol"; 206 } 207 208 const char * 209 ProcessGDBRemote::GetShortPluginName() 210 { 211 return GetPluginNameStatic(); 212 } 213 214 uint32_t 215 ProcessGDBRemote::GetPluginVersion() 216 { 217 return 1; 218 } 219 220 void 221 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 222 { 223 if (!force && m_register_info.GetNumRegisters() > 0) 224 return; 225 226 char packet[128]; 227 m_register_info.Clear(); 228 uint32_t reg_offset = 0; 229 uint32_t reg_num = 0; 230 StringExtractorGDBRemote::ResponseType response_type; 231 for (response_type = StringExtractorGDBRemote::eResponse; 232 response_type == StringExtractorGDBRemote::eResponse; 233 ++reg_num) 234 { 235 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 236 assert (packet_len < sizeof(packet)); 237 StringExtractorGDBRemote response; 238 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 239 { 240 response_type = response.GetResponseType(); 241 if (response_type == StringExtractorGDBRemote::eResponse) 242 { 243 std::string name; 244 std::string value; 245 ConstString reg_name; 246 ConstString alt_name; 247 ConstString set_name; 248 RegisterInfo reg_info = { NULL, // Name 249 NULL, // Alt name 250 0, // byte size 251 reg_offset, // offset 252 eEncodingUint, // encoding 253 eFormatHex, // formate 254 { 255 LLDB_INVALID_REGNUM, // GCC reg num 256 LLDB_INVALID_REGNUM, // DWARF reg num 257 LLDB_INVALID_REGNUM, // generic reg num 258 reg_num, // GDB reg num 259 reg_num // native register number 260 }, 261 NULL, 262 NULL 263 }; 264 265 while (response.GetNameColonValue(name, value)) 266 { 267 if (name.compare("name") == 0) 268 { 269 reg_name.SetCString(value.c_str()); 270 } 271 else if (name.compare("alt-name") == 0) 272 { 273 alt_name.SetCString(value.c_str()); 274 } 275 else if (name.compare("bitsize") == 0) 276 { 277 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 278 } 279 else if (name.compare("offset") == 0) 280 { 281 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 282 if (reg_offset != offset) 283 { 284 reg_offset = offset; 285 } 286 } 287 else if (name.compare("encoding") == 0) 288 { 289 if (value.compare("uint") == 0) 290 reg_info.encoding = eEncodingUint; 291 else if (value.compare("sint") == 0) 292 reg_info.encoding = eEncodingSint; 293 else if (value.compare("ieee754") == 0) 294 reg_info.encoding = eEncodingIEEE754; 295 else if (value.compare("vector") == 0) 296 reg_info.encoding = eEncodingVector; 297 } 298 else if (name.compare("format") == 0) 299 { 300 if (value.compare("binary") == 0) 301 reg_info.format = eFormatBinary; 302 else if (value.compare("decimal") == 0) 303 reg_info.format = eFormatDecimal; 304 else if (value.compare("hex") == 0) 305 reg_info.format = eFormatHex; 306 else if (value.compare("float") == 0) 307 reg_info.format = eFormatFloat; 308 else if (value.compare("vector-sint8") == 0) 309 reg_info.format = eFormatVectorOfSInt8; 310 else if (value.compare("vector-uint8") == 0) 311 reg_info.format = eFormatVectorOfUInt8; 312 else if (value.compare("vector-sint16") == 0) 313 reg_info.format = eFormatVectorOfSInt16; 314 else if (value.compare("vector-uint16") == 0) 315 reg_info.format = eFormatVectorOfUInt16; 316 else if (value.compare("vector-sint32") == 0) 317 reg_info.format = eFormatVectorOfSInt32; 318 else if (value.compare("vector-uint32") == 0) 319 reg_info.format = eFormatVectorOfUInt32; 320 else if (value.compare("vector-float32") == 0) 321 reg_info.format = eFormatVectorOfFloat32; 322 else if (value.compare("vector-uint128") == 0) 323 reg_info.format = eFormatVectorOfUInt128; 324 } 325 else if (name.compare("set") == 0) 326 { 327 set_name.SetCString(value.c_str()); 328 } 329 else if (name.compare("gcc") == 0) 330 { 331 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 332 } 333 else if (name.compare("dwarf") == 0) 334 { 335 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 336 } 337 else if (name.compare("generic") == 0) 338 { 339 if (value.compare("pc") == 0) 340 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; 341 else if (value.compare("sp") == 0) 342 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; 343 else if (value.compare("fp") == 0) 344 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; 345 else if (value.compare("ra") == 0) 346 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; 347 else if (value.compare("flags") == 0) 348 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS; 349 else if (value.find("arg") == 0) 350 { 351 if (value.size() == 4) 352 { 353 switch (value[3]) 354 { 355 case '1': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG1; break; 356 case '2': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG2; break; 357 case '3': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG3; break; 358 case '4': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG4; break; 359 case '5': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG5; break; 360 case '6': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG6; break; 361 case '7': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG7; break; 362 case '8': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG8; break; 363 } 364 } 365 } 366 } 367 } 368 369 reg_info.byte_offset = reg_offset; 370 assert (reg_info.byte_size != 0); 371 reg_offset += reg_info.byte_size; 372 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 373 } 374 } 375 else 376 { 377 response_type = StringExtractorGDBRemote::eError; 378 break; 379 } 380 } 381 382 // We didn't get anything if the accumulated reg_num is zero. See if we are 383 // debugging ARM and fill with a hard coded register set until we can get an 384 // updated debugserver down on the devices. 385 // On the other hand, if the accumulated reg_num is positive, see if we can 386 // add composite registers to the existing primordial ones. 387 bool from_scratch = (reg_num == 0); 388 389 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 390 const ArchSpec &remote_arch = m_gdb_comm.GetHostArchitecture(); 391 if (!target_arch.IsValid()) 392 { 393 if (remote_arch.IsValid() 394 && remote_arch.GetMachine() == llvm::Triple::arm 395 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 396 m_register_info.HardcodeARMRegisters(from_scratch); 397 } 398 else if (target_arch.GetMachine() == llvm::Triple::arm) 399 { 400 m_register_info.HardcodeARMRegisters(from_scratch); 401 } 402 403 // Add some convenience registers (eax, ebx, ecx, edx, esi, edi, ebp, esp) to x86_64. 404 if (target_arch.IsValid() && target_arch.GetMachine() == llvm::Triple::x86_64) 405 m_register_info.Addx86_64ConvenienceRegisters(); 406 407 // At this point, we can finalize our register info. 408 m_register_info.Finalize (); 409 } 410 411 Error 412 ProcessGDBRemote::WillLaunch (Module* module) 413 { 414 return WillLaunchOrAttach (); 415 } 416 417 Error 418 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 419 { 420 return WillLaunchOrAttach (); 421 } 422 423 Error 424 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 425 { 426 return WillLaunchOrAttach (); 427 } 428 429 Error 430 ProcessGDBRemote::DoConnectRemote (const char *remote_url) 431 { 432 Error error (WillLaunchOrAttach ()); 433 434 if (error.Fail()) 435 return error; 436 437 error = ConnectToDebugserver (remote_url); 438 439 if (error.Fail()) 440 return error; 441 StartAsyncThread (); 442 443 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 444 if (pid == LLDB_INVALID_PROCESS_ID) 445 { 446 // We don't have a valid process ID, so note that we are connected 447 // and could now request to launch or attach, or get remote process 448 // listings... 449 SetPrivateState (eStateConnected); 450 } 451 else 452 { 453 // We have a valid process 454 SetID (pid); 455 GetThreadList(); 456 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 457 { 458 const StateType state = SetThreadStopInfo (m_last_stop_packet); 459 if (state == eStateStopped) 460 { 461 SetPrivateState (state); 462 } 463 else 464 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 465 } 466 else 467 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 468 } 469 470 if (error.Success() 471 && !GetTarget().GetArchitecture().IsValid() 472 && m_gdb_comm.GetHostArchitecture().IsValid()) 473 { 474 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 475 } 476 477 return error; 478 } 479 480 Error 481 ProcessGDBRemote::WillLaunchOrAttach () 482 { 483 Error error; 484 m_stdio_communication.Clear (); 485 return error; 486 } 487 488 //---------------------------------------------------------------------- 489 // Process Control 490 //---------------------------------------------------------------------- 491 Error 492 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 493 { 494 Error error; 495 496 uint32_t launch_flags = launch_info.GetFlags().Get(); 497 const char *stdin_path = NULL; 498 const char *stdout_path = NULL; 499 const char *stderr_path = NULL; 500 const char *working_dir = launch_info.GetWorkingDirectory(); 501 502 const ProcessLaunchInfo::FileAction *file_action; 503 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 504 if (file_action) 505 { 506 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 507 stdin_path = file_action->GetPath(); 508 } 509 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 510 if (file_action) 511 { 512 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 513 stdout_path = file_action->GetPath(); 514 } 515 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 516 if (file_action) 517 { 518 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 519 stderr_path = file_action->GetPath(); 520 } 521 522 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 523 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 524 // ::LogSetLogFile ("/dev/stdout"); 525 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 526 527 ObjectFile * object_file = exe_module->GetObjectFile(); 528 if (object_file) 529 { 530 char host_port[128]; 531 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 532 char connect_url[128]; 533 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 534 535 // Make sure we aren't already connected? 536 if (!m_gdb_comm.IsConnected()) 537 { 538 error = StartDebugserverProcess (host_port, launch_info); 539 if (error.Fail()) 540 { 541 if (log) 542 log->Printf("failed to start debugserver process: %s", error.AsCString()); 543 return error; 544 } 545 546 error = ConnectToDebugserver (connect_url); 547 } 548 549 if (error.Success()) 550 { 551 lldb_utility::PseudoTerminal pty; 552 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 553 554 // If the debugserver is local and we aren't disabling STDIO, lets use 555 // a pseudo terminal to instead of relying on the 'O' packets for stdio 556 // since 'O' packets can really slow down debugging if the inferior 557 // does a lot of output. 558 PlatformSP platform_sp (m_target.GetPlatform()); 559 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 560 { 561 const char *slave_name = NULL; 562 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 563 { 564 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 565 slave_name = pty.GetSlaveName (NULL, 0); 566 } 567 if (stdin_path == NULL) 568 stdin_path = slave_name; 569 570 if (stdout_path == NULL) 571 stdout_path = slave_name; 572 573 if (stderr_path == NULL) 574 stderr_path = slave_name; 575 } 576 577 // Set STDIN to /dev/null if we want STDIO disabled or if either 578 // STDOUT or STDERR have been set to something and STDIN hasn't 579 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 580 stdin_path = "/dev/null"; 581 582 // Set STDOUT to /dev/null if we want STDIO disabled or if either 583 // STDIN or STDERR have been set to something and STDOUT hasn't 584 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 585 stdout_path = "/dev/null"; 586 587 // Set STDERR to /dev/null if we want STDIO disabled or if either 588 // STDIN or STDOUT have been set to something and STDERR hasn't 589 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 590 stderr_path = "/dev/null"; 591 592 if (stdin_path) 593 m_gdb_comm.SetSTDIN (stdin_path); 594 if (stdout_path) 595 m_gdb_comm.SetSTDOUT (stdout_path); 596 if (stderr_path) 597 m_gdb_comm.SetSTDERR (stderr_path); 598 599 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 600 601 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 602 603 if (working_dir && working_dir[0]) 604 { 605 m_gdb_comm.SetWorkingDir (working_dir); 606 } 607 608 // Send the environment and the program + arguments after we connect 609 const Args &environment = launch_info.GetEnvironmentEntries(); 610 if (environment.GetArgumentCount()) 611 { 612 size_t num_environment_entries = environment.GetArgumentCount(); 613 for (size_t i=0; i<num_environment_entries; ++i) 614 { 615 const char *env_entry = environment.GetArgumentAtIndex(i); 616 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 617 break; 618 } 619 } 620 621 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 622 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 623 if (arg_packet_err == 0) 624 { 625 std::string error_str; 626 if (m_gdb_comm.GetLaunchSuccess (error_str)) 627 { 628 SetID (m_gdb_comm.GetCurrentProcessID ()); 629 } 630 else 631 { 632 error.SetErrorString (error_str.c_str()); 633 } 634 } 635 else 636 { 637 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 638 } 639 640 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 641 642 if (GetID() == LLDB_INVALID_PROCESS_ID) 643 { 644 if (log) 645 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 646 KillDebugserverProcess (); 647 return error; 648 } 649 650 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 651 { 652 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 653 654 if (!disable_stdio) 655 { 656 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 657 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 658 } 659 } 660 } 661 else 662 { 663 if (log) 664 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 665 } 666 } 667 else 668 { 669 // Set our user ID to an invalid process ID. 670 SetID(LLDB_INVALID_PROCESS_ID); 671 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 672 exe_module->GetFileSpec().GetFilename().AsCString(), 673 exe_module->GetArchitecture().GetArchitectureName()); 674 } 675 return error; 676 677 } 678 679 680 Error 681 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 682 { 683 Error error; 684 // Sleep and wait a bit for debugserver to start to listen... 685 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 686 if (conn_ap.get()) 687 { 688 const uint32_t max_retry_count = 50; 689 uint32_t retry_count = 0; 690 while (!m_gdb_comm.IsConnected()) 691 { 692 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 693 { 694 m_gdb_comm.SetConnection (conn_ap.release()); 695 break; 696 } 697 retry_count++; 698 699 if (retry_count >= max_retry_count) 700 break; 701 702 usleep (100000); 703 } 704 } 705 706 if (!m_gdb_comm.IsConnected()) 707 { 708 if (error.Success()) 709 error.SetErrorString("not connected to remote gdb server"); 710 return error; 711 } 712 713 // We always seem to be able to open a connection to a local port 714 // so we need to make sure we can then send data to it. If we can't 715 // then we aren't actually connected to anything, so try and do the 716 // handshake with the remote GDB server and make sure that goes 717 // alright. 718 if (!m_gdb_comm.HandshakeWithServer (NULL)) 719 { 720 m_gdb_comm.Disconnect(); 721 if (error.Success()) 722 error.SetErrorString("not connected to remote gdb server"); 723 return error; 724 } 725 m_gdb_comm.ResetDiscoverableSettings(); 726 m_gdb_comm.QueryNoAckModeSupported (); 727 m_gdb_comm.GetThreadSuffixSupported (); 728 m_gdb_comm.GetListThreadsInStopReplySupported (); 729 m_gdb_comm.GetHostInfo (); 730 m_gdb_comm.GetVContSupported ('c'); 731 return error; 732 } 733 734 void 735 ProcessGDBRemote::DidLaunchOrAttach () 736 { 737 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 738 if (log) 739 log->Printf ("ProcessGDBRemote::DidLaunch()"); 740 if (GetID() != LLDB_INVALID_PROCESS_ID) 741 { 742 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 743 744 BuildDynamicRegisterInfo (false); 745 746 // See if the GDB server supports the qHostInfo information 747 748 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 749 if (gdb_remote_arch.IsValid()) 750 { 751 ArchSpec &target_arch = GetTarget().GetArchitecture(); 752 753 if (target_arch.IsValid()) 754 { 755 // If the remote host is ARM and we have apple as the vendor, then 756 // ARM executables and shared libraries can have mixed ARM architectures. 757 // You can have an armv6 executable, and if the host is armv7, then the 758 // system will load the best possible architecture for all shared libraries 759 // it has, so we really need to take the remote host architecture as our 760 // defacto architecture in this case. 761 762 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 763 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 764 { 765 target_arch = gdb_remote_arch; 766 } 767 else 768 { 769 // Fill in what is missing in the triple 770 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 771 llvm::Triple &target_triple = target_arch.GetTriple(); 772 if (target_triple.getVendorName().size() == 0) 773 { 774 target_triple.setVendor (remote_triple.getVendor()); 775 776 if (target_triple.getOSName().size() == 0) 777 { 778 target_triple.setOS (remote_triple.getOS()); 779 780 if (target_triple.getEnvironmentName().size() == 0) 781 target_triple.setEnvironment (remote_triple.getEnvironment()); 782 } 783 } 784 } 785 } 786 else 787 { 788 // The target doesn't have a valid architecture yet, set it from 789 // the architecture we got from the remote GDB server 790 target_arch = gdb_remote_arch; 791 } 792 } 793 } 794 } 795 796 void 797 ProcessGDBRemote::DidLaunch () 798 { 799 DidLaunchOrAttach (); 800 } 801 802 Error 803 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 804 { 805 ProcessAttachInfo attach_info; 806 return DoAttachToProcessWithID(attach_pid, attach_info); 807 } 808 809 Error 810 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 811 { 812 Error error; 813 // Clear out and clean up from any current state 814 Clear(); 815 if (attach_pid != LLDB_INVALID_PROCESS_ID) 816 { 817 // Make sure we aren't already connected? 818 if (!m_gdb_comm.IsConnected()) 819 { 820 char host_port[128]; 821 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 822 char connect_url[128]; 823 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 824 825 error = StartDebugserverProcess (host_port, attach_info); 826 827 if (error.Fail()) 828 { 829 const char *error_string = error.AsCString(); 830 if (error_string == NULL) 831 error_string = "unable to launch " DEBUGSERVER_BASENAME; 832 833 SetExitStatus (-1, error_string); 834 } 835 else 836 { 837 error = ConnectToDebugserver (connect_url); 838 } 839 } 840 841 if (error.Success()) 842 { 843 char packet[64]; 844 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%llx", attach_pid); 845 SetID (attach_pid); 846 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 847 } 848 } 849 return error; 850 } 851 852 size_t 853 ProcessGDBRemote::AttachInputReaderCallback 854 ( 855 void *baton, 856 InputReader *reader, 857 lldb::InputReaderAction notification, 858 const char *bytes, 859 size_t bytes_len 860 ) 861 { 862 if (notification == eInputReaderGotToken) 863 { 864 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 865 if (gdb_process->m_waiting_for_attach) 866 gdb_process->m_waiting_for_attach = false; 867 reader->SetIsDone(true); 868 return 1; 869 } 870 return 0; 871 } 872 873 Error 874 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 875 { 876 Error error; 877 // Clear out and clean up from any current state 878 Clear(); 879 880 if (process_name && process_name[0]) 881 { 882 // Make sure we aren't already connected? 883 if (!m_gdb_comm.IsConnected()) 884 { 885 char host_port[128]; 886 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 887 char connect_url[128]; 888 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 889 890 error = StartDebugserverProcess (host_port, attach_info); 891 if (error.Fail()) 892 { 893 const char *error_string = error.AsCString(); 894 if (error_string == NULL) 895 error_string = "unable to launch " DEBUGSERVER_BASENAME; 896 897 SetExitStatus (-1, error_string); 898 } 899 else 900 { 901 error = ConnectToDebugserver (connect_url); 902 } 903 } 904 905 if (error.Success()) 906 { 907 StreamString packet; 908 909 if (wait_for_launch) 910 packet.PutCString("vAttachWait"); 911 else 912 packet.PutCString("vAttachName"); 913 packet.PutChar(';'); 914 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 915 916 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 917 918 } 919 } 920 return error; 921 } 922 923 924 void 925 ProcessGDBRemote::DidAttach () 926 { 927 DidLaunchOrAttach (); 928 } 929 930 Error 931 ProcessGDBRemote::WillResume () 932 { 933 m_continue_c_tids.clear(); 934 m_continue_C_tids.clear(); 935 m_continue_s_tids.clear(); 936 m_continue_S_tids.clear(); 937 return Error(); 938 } 939 940 Error 941 ProcessGDBRemote::DoResume () 942 { 943 Error error; 944 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 945 if (log) 946 log->Printf ("ProcessGDBRemote::Resume()"); 947 948 Listener listener ("gdb-remote.resume-packet-sent"); 949 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 950 { 951 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 952 953 StreamString continue_packet; 954 bool continue_packet_error = false; 955 if (m_gdb_comm.HasAnyVContSupport ()) 956 { 957 continue_packet.PutCString ("vCont"); 958 959 if (!m_continue_c_tids.empty()) 960 { 961 if (m_gdb_comm.GetVContSupported ('c')) 962 { 963 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) 964 continue_packet.Printf(";c:%4.4llx", *t_pos); 965 } 966 else 967 continue_packet_error = true; 968 } 969 970 if (!continue_packet_error && !m_continue_C_tids.empty()) 971 { 972 if (m_gdb_comm.GetVContSupported ('C')) 973 { 974 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) 975 continue_packet.Printf(";C%2.2x:%4.4llx", s_pos->second, s_pos->first); 976 } 977 else 978 continue_packet_error = true; 979 } 980 981 if (!continue_packet_error && !m_continue_s_tids.empty()) 982 { 983 if (m_gdb_comm.GetVContSupported ('s')) 984 { 985 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) 986 continue_packet.Printf(";s:%4.4llx", *t_pos); 987 } 988 else 989 continue_packet_error = true; 990 } 991 992 if (!continue_packet_error && !m_continue_S_tids.empty()) 993 { 994 if (m_gdb_comm.GetVContSupported ('S')) 995 { 996 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) 997 continue_packet.Printf(";S%2.2x:%4.4llx", s_pos->second, s_pos->first); 998 } 999 else 1000 continue_packet_error = true; 1001 } 1002 1003 if (continue_packet_error) 1004 continue_packet.GetString().clear(); 1005 } 1006 else 1007 continue_packet_error = true; 1008 1009 if (continue_packet_error) 1010 { 1011 // Either no vCont support, or we tried to use part of the vCont 1012 // packet that wasn't supported by the remote GDB server. 1013 // We need to try and make a simple packet that can do our continue 1014 const size_t num_threads = GetThreadList().GetSize(); 1015 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1016 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1017 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1018 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1019 if (num_continue_c_tids > 0) 1020 { 1021 if (num_continue_c_tids == num_threads) 1022 { 1023 // All threads are resuming... 1024 m_gdb_comm.SetCurrentThreadForRun (-1); 1025 continue_packet.PutChar ('c'); 1026 continue_packet_error = false; 1027 } 1028 else if (num_continue_c_tids == 1 && 1029 num_continue_C_tids == 0 && 1030 num_continue_s_tids == 0 && 1031 num_continue_S_tids == 0 ) 1032 { 1033 // Only one thread is continuing 1034 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1035 continue_packet.PutChar ('c'); 1036 continue_packet_error = false; 1037 } 1038 } 1039 1040 if (continue_packet_error && num_continue_C_tids > 0) 1041 { 1042 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1043 num_continue_C_tids > 0 && 1044 num_continue_s_tids == 0 && 1045 num_continue_S_tids == 0 ) 1046 { 1047 const int continue_signo = m_continue_C_tids.front().second; 1048 // Only one thread is continuing 1049 if (num_continue_C_tids > 1) 1050 { 1051 // More that one thread with a signal, yet we don't have 1052 // vCont support and we are being asked to resume each 1053 // thread with a signal, we need to make sure they are 1054 // all the same signal, or we can't issue the continue 1055 // accurately with the current support... 1056 if (num_continue_C_tids > 1) 1057 { 1058 continue_packet_error = false; 1059 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1060 { 1061 if (m_continue_C_tids[i].second != continue_signo) 1062 continue_packet_error = true; 1063 } 1064 } 1065 if (!continue_packet_error) 1066 m_gdb_comm.SetCurrentThreadForRun (-1); 1067 } 1068 else 1069 { 1070 // Set the continue thread ID 1071 continue_packet_error = false; 1072 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1073 } 1074 if (!continue_packet_error) 1075 { 1076 // Add threads continuing with the same signo... 1077 continue_packet.Printf("C%2.2x", continue_signo); 1078 } 1079 } 1080 } 1081 1082 if (continue_packet_error && num_continue_s_tids > 0) 1083 { 1084 if (num_continue_s_tids == num_threads) 1085 { 1086 // All threads are resuming... 1087 m_gdb_comm.SetCurrentThreadForRun (-1); 1088 continue_packet.PutChar ('s'); 1089 continue_packet_error = false; 1090 } 1091 else if (num_continue_c_tids == 0 && 1092 num_continue_C_tids == 0 && 1093 num_continue_s_tids == 1 && 1094 num_continue_S_tids == 0 ) 1095 { 1096 // Only one thread is stepping 1097 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1098 continue_packet.PutChar ('s'); 1099 continue_packet_error = false; 1100 } 1101 } 1102 1103 if (!continue_packet_error && num_continue_S_tids > 0) 1104 { 1105 if (num_continue_S_tids == num_threads) 1106 { 1107 const int step_signo = m_continue_S_tids.front().second; 1108 // Are all threads trying to step with the same signal? 1109 continue_packet_error = false; 1110 if (num_continue_S_tids > 1) 1111 { 1112 for (size_t i=1; i<num_threads; ++i) 1113 { 1114 if (m_continue_S_tids[i].second != step_signo) 1115 continue_packet_error = true; 1116 } 1117 } 1118 if (!continue_packet_error) 1119 { 1120 // Add threads stepping with the same signo... 1121 m_gdb_comm.SetCurrentThreadForRun (-1); 1122 continue_packet.Printf("S%2.2x", step_signo); 1123 } 1124 } 1125 else if (num_continue_c_tids == 0 && 1126 num_continue_C_tids == 0 && 1127 num_continue_s_tids == 0 && 1128 num_continue_S_tids == 1 ) 1129 { 1130 // Only one thread is stepping with signal 1131 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1132 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1133 continue_packet_error = false; 1134 } 1135 } 1136 } 1137 1138 if (continue_packet_error) 1139 { 1140 error.SetErrorString ("can't make continue packet for this resume"); 1141 } 1142 else 1143 { 1144 EventSP event_sp; 1145 TimeValue timeout; 1146 timeout = TimeValue::Now(); 1147 timeout.OffsetWithSeconds (5); 1148 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1149 { 1150 error.SetErrorString ("Trying to resume but the async thread is dead."); 1151 if (log) 1152 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1153 return error; 1154 } 1155 1156 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1157 1158 if (listener.WaitForEvent (&timeout, event_sp) == false) 1159 { 1160 error.SetErrorString("Resume timed out."); 1161 if (log) 1162 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1163 } 1164 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1165 { 1166 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1167 if (log) 1168 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1169 return error; 1170 } 1171 } 1172 } 1173 1174 return error; 1175 } 1176 1177 void 1178 ProcessGDBRemote::ClearThreadIDList () 1179 { 1180 Mutex::Locker locker(m_thread_list.GetMutex()); 1181 m_thread_ids.clear(); 1182 } 1183 1184 bool 1185 ProcessGDBRemote::UpdateThreadIDList () 1186 { 1187 Mutex::Locker locker(m_thread_list.GetMutex()); 1188 bool sequence_mutex_unavailable = false; 1189 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1190 if (sequence_mutex_unavailable) 1191 { 1192 #if defined (LLDB_CONFIGURATION_DEBUG) 1193 assert(!"ProcessGDBRemote::UpdateThreadList() failed due to not getting the sequence mutex"); 1194 #endif 1195 return false; // We just didn't get the list 1196 } 1197 return true; 1198 } 1199 1200 bool 1201 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1202 { 1203 // locker will keep a mutex locked until it goes out of scope 1204 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1205 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1206 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1207 1208 size_t num_thread_ids = m_thread_ids.size(); 1209 // The "m_thread_ids" thread ID list should always be updated after each stop 1210 // reply packet, but in case it isn't, update it here. 1211 if (num_thread_ids == 0) 1212 { 1213 if (!UpdateThreadIDList ()) 1214 return false; 1215 num_thread_ids = m_thread_ids.size(); 1216 } 1217 1218 if (num_thread_ids > 0) 1219 { 1220 for (size_t i=0; i<num_thread_ids; ++i) 1221 { 1222 tid_t tid = m_thread_ids[i]; 1223 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1224 if (!thread_sp) 1225 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1226 new_thread_list.AddThread(thread_sp); 1227 } 1228 } 1229 1230 return true; 1231 } 1232 1233 1234 StateType 1235 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1236 { 1237 stop_packet.SetFilePos (0); 1238 const char stop_type = stop_packet.GetChar(); 1239 switch (stop_type) 1240 { 1241 case 'T': 1242 case 'S': 1243 { 1244 if (GetStopID() == 0) 1245 { 1246 // Our first stop, make sure we have a process ID, and also make 1247 // sure we know about our registers 1248 if (GetID() == LLDB_INVALID_PROCESS_ID) 1249 { 1250 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1251 if (pid != LLDB_INVALID_PROCESS_ID) 1252 SetID (pid); 1253 } 1254 BuildDynamicRegisterInfo (true); 1255 } 1256 // Stop with signal and thread info 1257 const uint8_t signo = stop_packet.GetHexU8(); 1258 std::string name; 1259 std::string value; 1260 std::string thread_name; 1261 std::string reason; 1262 std::string description; 1263 uint32_t exc_type = 0; 1264 std::vector<addr_t> exc_data; 1265 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1266 uint32_t exc_data_count = 0; 1267 ThreadSP thread_sp; 1268 1269 while (stop_packet.GetNameColonValue(name, value)) 1270 { 1271 if (name.compare("metype") == 0) 1272 { 1273 // exception type in big endian hex 1274 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1275 } 1276 else if (name.compare("mecount") == 0) 1277 { 1278 // exception count in big endian hex 1279 exc_data_count = Args::StringToUInt32 (value.c_str(), 0, 16); 1280 } 1281 else if (name.compare("medata") == 0) 1282 { 1283 // exception data in big endian hex 1284 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1285 } 1286 else if (name.compare("thread") == 0) 1287 { 1288 // thread in big endian hex 1289 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1290 // m_thread_list does have its own mutex, but we need to 1291 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1292 // and the m_thread_list.AddThread(...) so it doesn't change on us 1293 Mutex::Locker locker (m_thread_list.GetMutex ()); 1294 thread_sp = m_thread_list.FindThreadByID(tid, false); 1295 if (!thread_sp) 1296 { 1297 // Create the thread if we need to 1298 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1299 m_thread_list.AddThread(thread_sp); 1300 } 1301 } 1302 else if (name.compare("threads") == 0) 1303 { 1304 Mutex::Locker locker(m_thread_list.GetMutex()); 1305 m_thread_ids.clear(); 1306 // A comma separated list of all threads in the current 1307 // process that includes the thread for this stop reply 1308 // packet 1309 size_t comma_pos; 1310 lldb::tid_t tid; 1311 while ((comma_pos = value.find(',')) != std::string::npos) 1312 { 1313 value[comma_pos] = '\0'; 1314 // thread in big endian hex 1315 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1316 if (tid != LLDB_INVALID_THREAD_ID) 1317 m_thread_ids.push_back (tid); 1318 value.erase(0, comma_pos + 1); 1319 1320 } 1321 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1322 if (tid != LLDB_INVALID_THREAD_ID) 1323 m_thread_ids.push_back (tid); 1324 } 1325 else if (name.compare("hexname") == 0) 1326 { 1327 StringExtractor name_extractor; 1328 // Swap "value" over into "name_extractor" 1329 name_extractor.GetStringRef().swap(value); 1330 // Now convert the HEX bytes into a string value 1331 name_extractor.GetHexByteString (value); 1332 thread_name.swap (value); 1333 } 1334 else if (name.compare("name") == 0) 1335 { 1336 thread_name.swap (value); 1337 } 1338 else if (name.compare("qaddr") == 0) 1339 { 1340 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1341 } 1342 else if (name.compare("reason") == 0) 1343 { 1344 reason.swap(value); 1345 } 1346 else if (name.compare("description") == 0) 1347 { 1348 StringExtractor desc_extractor; 1349 // Swap "value" over into "name_extractor" 1350 desc_extractor.GetStringRef().swap(value); 1351 // Now convert the HEX bytes into a string value 1352 desc_extractor.GetHexByteString (thread_name); 1353 } 1354 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1355 { 1356 // We have a register number that contains an expedited 1357 // register value. Lets supply this register to our thread 1358 // so it won't have to go and read it. 1359 if (thread_sp) 1360 { 1361 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1362 1363 if (reg != UINT32_MAX) 1364 { 1365 StringExtractor reg_value_extractor; 1366 // Swap "value" over into "reg_value_extractor" 1367 reg_value_extractor.GetStringRef().swap(value); 1368 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1369 { 1370 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1371 name.c_str(), 1372 reg, 1373 reg, 1374 reg_value_extractor.GetStringRef().c_str(), 1375 stop_packet.GetStringRef().c_str()); 1376 } 1377 } 1378 } 1379 } 1380 } 1381 1382 if (thread_sp) 1383 { 1384 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1385 1386 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1387 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1388 if (exc_type != 0) 1389 { 1390 const size_t exc_data_size = exc_data.size(); 1391 1392 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1393 exc_type, 1394 exc_data_size, 1395 exc_data_size >= 1 ? exc_data[0] : 0, 1396 exc_data_size >= 2 ? exc_data[1] : 0, 1397 exc_data_size >= 3 ? exc_data[2] : 0)); 1398 } 1399 else 1400 { 1401 bool handled = false; 1402 if (!reason.empty()) 1403 { 1404 if (reason.compare("trace") == 0) 1405 { 1406 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1407 handled = true; 1408 } 1409 else if (reason.compare("breakpoint") == 0) 1410 { 1411 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1412 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1413 if (bp_site_sp) 1414 { 1415 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1416 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1417 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1418 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1419 { 1420 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1421 handled = true; 1422 } 1423 } 1424 1425 if (!handled) 1426 { 1427 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1428 } 1429 } 1430 else if (reason.compare("trap") == 0) 1431 { 1432 // Let the trap just use the standard signal stop reason below... 1433 } 1434 else if (reason.compare("watchpoint") == 0) 1435 { 1436 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1437 // TODO: locate the watchpoint somehow... 1438 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1439 handled = true; 1440 } 1441 else if (reason.compare("exception") == 0) 1442 { 1443 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1444 handled = true; 1445 } 1446 } 1447 1448 if (signo) 1449 { 1450 if (signo == SIGTRAP) 1451 { 1452 // Currently we are going to assume SIGTRAP means we are either 1453 // hitting a breakpoint or hardware single stepping. 1454 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1455 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1456 if (bp_site_sp) 1457 { 1458 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1459 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1460 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1461 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1462 { 1463 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1464 handled = true; 1465 } 1466 } 1467 if (!handled) 1468 { 1469 // TODO: check for breakpoint or trap opcode in case there is a hard 1470 // coded software trap 1471 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1472 handled = true; 1473 } 1474 } 1475 if (!handled) 1476 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1477 } 1478 else 1479 { 1480 StopInfoSP invalid_stop_info_sp; 1481 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1482 } 1483 1484 if (!description.empty()) 1485 { 1486 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1487 if (stop_info_sp) 1488 { 1489 stop_info_sp->SetDescription (description.c_str()); 1490 } 1491 else 1492 { 1493 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1494 } 1495 } 1496 } 1497 } 1498 return eStateStopped; 1499 } 1500 break; 1501 1502 case 'W': 1503 // process exited 1504 return eStateExited; 1505 1506 default: 1507 break; 1508 } 1509 return eStateInvalid; 1510 } 1511 1512 void 1513 ProcessGDBRemote::RefreshStateAfterStop () 1514 { 1515 Mutex::Locker locker(m_thread_list.GetMutex()); 1516 m_thread_ids.clear(); 1517 // Set the thread stop info. It might have a "threads" key whose value is 1518 // a list of all thread IDs in the current process, so m_thread_ids might 1519 // get set. 1520 SetThreadStopInfo (m_last_stop_packet); 1521 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1522 if (m_thread_ids.empty()) 1523 { 1524 // No, we need to fetch the thread list manually 1525 UpdateThreadIDList(); 1526 } 1527 1528 // Let all threads recover from stopping and do any clean up based 1529 // on the previous thread state (if any). 1530 m_thread_list.RefreshStateAfterStop(); 1531 1532 } 1533 1534 Error 1535 ProcessGDBRemote::DoHalt (bool &caused_stop) 1536 { 1537 Error error; 1538 1539 bool timed_out = false; 1540 Mutex::Locker locker; 1541 1542 if (m_public_state.GetValue() == eStateAttaching) 1543 { 1544 // We are being asked to halt during an attach. We need to just close 1545 // our file handle and debugserver will go away, and we can be done... 1546 m_gdb_comm.Disconnect(); 1547 } 1548 else 1549 { 1550 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1551 { 1552 if (timed_out) 1553 error.SetErrorString("timed out sending interrupt packet"); 1554 else 1555 error.SetErrorString("unknown error sending interrupt packet"); 1556 } 1557 1558 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1559 } 1560 return error; 1561 } 1562 1563 Error 1564 ProcessGDBRemote::InterruptIfRunning 1565 ( 1566 bool discard_thread_plans, 1567 bool catch_stop_event, 1568 EventSP &stop_event_sp 1569 ) 1570 { 1571 Error error; 1572 1573 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1574 1575 bool paused_private_state_thread = false; 1576 const bool is_running = m_gdb_comm.IsRunning(); 1577 if (log) 1578 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1579 discard_thread_plans, 1580 catch_stop_event, 1581 is_running); 1582 1583 if (discard_thread_plans) 1584 { 1585 if (log) 1586 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1587 m_thread_list.DiscardThreadPlans(); 1588 } 1589 if (is_running) 1590 { 1591 if (catch_stop_event) 1592 { 1593 if (log) 1594 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1595 PausePrivateStateThread(); 1596 paused_private_state_thread = true; 1597 } 1598 1599 bool timed_out = false; 1600 Mutex::Locker locker; 1601 1602 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1603 { 1604 if (timed_out) 1605 error.SetErrorString("timed out sending interrupt packet"); 1606 else 1607 error.SetErrorString("unknown error sending interrupt packet"); 1608 if (paused_private_state_thread) 1609 ResumePrivateStateThread(); 1610 return error; 1611 } 1612 1613 if (catch_stop_event) 1614 { 1615 // LISTEN HERE 1616 TimeValue timeout_time; 1617 timeout_time = TimeValue::Now(); 1618 timeout_time.OffsetWithSeconds(5); 1619 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1620 1621 timed_out = state == eStateInvalid; 1622 if (log) 1623 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1624 1625 if (timed_out) 1626 error.SetErrorString("unable to verify target stopped"); 1627 } 1628 1629 if (paused_private_state_thread) 1630 { 1631 if (log) 1632 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1633 ResumePrivateStateThread(); 1634 } 1635 } 1636 return error; 1637 } 1638 1639 Error 1640 ProcessGDBRemote::WillDetach () 1641 { 1642 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1643 if (log) 1644 log->Printf ("ProcessGDBRemote::WillDetach()"); 1645 1646 bool discard_thread_plans = true; 1647 bool catch_stop_event = true; 1648 EventSP event_sp; 1649 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1650 } 1651 1652 Error 1653 ProcessGDBRemote::DoDetach() 1654 { 1655 Error error; 1656 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1657 if (log) 1658 log->Printf ("ProcessGDBRemote::DoDetach()"); 1659 1660 DisableAllBreakpointSites (); 1661 1662 m_thread_list.DiscardThreadPlans(); 1663 1664 bool success = m_gdb_comm.Detach (); 1665 if (log) 1666 { 1667 if (success) 1668 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1669 else 1670 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1671 } 1672 // Sleep for one second to let the process get all detached... 1673 StopAsyncThread (); 1674 1675 SetPrivateState (eStateDetached); 1676 ResumePrivateStateThread(); 1677 1678 //KillDebugserverProcess (); 1679 return error; 1680 } 1681 1682 Error 1683 ProcessGDBRemote::DoDestroy () 1684 { 1685 Error error; 1686 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1687 if (log) 1688 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1689 1690 // Interrupt if our inferior is running... 1691 if (m_gdb_comm.IsConnected()) 1692 { 1693 if (m_public_state.GetValue() != eStateAttaching) 1694 { 1695 1696 StringExtractorGDBRemote response; 1697 bool send_async = true; 1698 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1699 { 1700 char packet_cmd = response.GetChar(0); 1701 1702 if (packet_cmd == 'W' || packet_cmd == 'X') 1703 { 1704 SetLastStopPacket (response); 1705 ClearThreadIDList (); 1706 SetExitStatus(response.GetHexU8(), NULL); 1707 } 1708 } 1709 else 1710 { 1711 SetExitStatus(SIGABRT, NULL); 1712 //error.SetErrorString("kill packet failed"); 1713 } 1714 } 1715 } 1716 StopAsyncThread (); 1717 KillDebugserverProcess (); 1718 return error; 1719 } 1720 1721 //------------------------------------------------------------------ 1722 // Process Queries 1723 //------------------------------------------------------------------ 1724 1725 bool 1726 ProcessGDBRemote::IsAlive () 1727 { 1728 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1729 } 1730 1731 addr_t 1732 ProcessGDBRemote::GetImageInfoAddress() 1733 { 1734 return m_gdb_comm.GetShlibInfoAddr(); 1735 } 1736 1737 //------------------------------------------------------------------ 1738 // Process Memory 1739 //------------------------------------------------------------------ 1740 size_t 1741 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1742 { 1743 if (size > m_max_memory_size) 1744 { 1745 // Keep memory read sizes down to a sane limit. This function will be 1746 // called multiple times in order to complete the task by 1747 // lldb_private::Process so it is ok to do this. 1748 size = m_max_memory_size; 1749 } 1750 1751 char packet[64]; 1752 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%zx", (uint64_t)addr, size); 1753 assert (packet_len + 1 < sizeof(packet)); 1754 StringExtractorGDBRemote response; 1755 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1756 { 1757 if (response.IsNormalResponse()) 1758 { 1759 error.Clear(); 1760 return response.GetHexBytes(buf, size, '\xdd'); 1761 } 1762 else if (response.IsErrorResponse()) 1763 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1764 else if (response.IsUnsupportedResponse()) 1765 error.SetErrorStringWithFormat("'%s' packet unsupported", packet); 1766 else 1767 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet, response.GetStringRef().c_str()); 1768 } 1769 else 1770 { 1771 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1772 } 1773 return 0; 1774 } 1775 1776 size_t 1777 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1778 { 1779 if (size > m_max_memory_size) 1780 { 1781 // Keep memory read sizes down to a sane limit. This function will be 1782 // called multiple times in order to complete the task by 1783 // lldb_private::Process so it is ok to do this. 1784 size = m_max_memory_size; 1785 } 1786 1787 StreamString packet; 1788 packet.Printf("M%llx,%zx:", addr, size); 1789 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1790 StringExtractorGDBRemote response; 1791 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1792 { 1793 if (response.IsOKResponse()) 1794 { 1795 error.Clear(); 1796 return size; 1797 } 1798 else if (response.IsErrorResponse()) 1799 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1800 else if (response.IsUnsupportedResponse()) 1801 error.SetErrorStringWithFormat("'%s' packet unsupported", packet.GetString().c_str()); 1802 else 1803 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1804 } 1805 else 1806 { 1807 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1808 } 1809 return 0; 1810 } 1811 1812 lldb::addr_t 1813 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1814 { 1815 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1816 1817 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1818 switch (supported) 1819 { 1820 case eLazyBoolCalculate: 1821 case eLazyBoolYes: 1822 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1823 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1824 return allocated_addr; 1825 1826 case eLazyBoolNo: 1827 // Call mmap() to create memory in the inferior.. 1828 unsigned prot = 0; 1829 if (permissions & lldb::ePermissionsReadable) 1830 prot |= eMmapProtRead; 1831 if (permissions & lldb::ePermissionsWritable) 1832 prot |= eMmapProtWrite; 1833 if (permissions & lldb::ePermissionsExecutable) 1834 prot |= eMmapProtExec; 1835 1836 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 1837 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 1838 m_addr_to_mmap_size[allocated_addr] = size; 1839 else 1840 allocated_addr = LLDB_INVALID_ADDRESS; 1841 break; 1842 } 1843 1844 if (allocated_addr == LLDB_INVALID_ADDRESS) 1845 error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); 1846 else 1847 error.Clear(); 1848 return allocated_addr; 1849 } 1850 1851 Error 1852 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 1853 MemoryRegionInfo ®ion_info) 1854 { 1855 1856 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 1857 return error; 1858 } 1859 1860 Error 1861 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 1862 { 1863 1864 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 1865 return error; 1866 } 1867 1868 Error 1869 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 1870 { 1871 Error error; 1872 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1873 1874 switch (supported) 1875 { 1876 case eLazyBoolCalculate: 1877 // We should never be deallocating memory without allocating memory 1878 // first so we should never get eLazyBoolCalculate 1879 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 1880 break; 1881 1882 case eLazyBoolYes: 1883 if (!m_gdb_comm.DeallocateMemory (addr)) 1884 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1885 break; 1886 1887 case eLazyBoolNo: 1888 // Call munmap() to deallocate memory in the inferior.. 1889 { 1890 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 1891 if (pos != m_addr_to_mmap_size.end() && 1892 InferiorCallMunmap(this, addr, pos->second)) 1893 m_addr_to_mmap_size.erase (pos); 1894 else 1895 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 1896 } 1897 break; 1898 } 1899 1900 return error; 1901 } 1902 1903 1904 //------------------------------------------------------------------ 1905 // Process STDIO 1906 //------------------------------------------------------------------ 1907 size_t 1908 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 1909 { 1910 if (m_stdio_communication.IsConnected()) 1911 { 1912 ConnectionStatus status; 1913 m_stdio_communication.Write(src, src_len, status, NULL); 1914 } 1915 return 0; 1916 } 1917 1918 Error 1919 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 1920 { 1921 Error error; 1922 assert (bp_site != NULL); 1923 1924 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1925 user_id_t site_id = bp_site->GetID(); 1926 const addr_t addr = bp_site->GetLoadAddress(); 1927 if (log) 1928 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 1929 1930 if (bp_site->IsEnabled()) 1931 { 1932 if (log) 1933 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 1934 return error; 1935 } 1936 else 1937 { 1938 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1939 1940 if (bp_site->HardwarePreferred()) 1941 { 1942 // Try and set hardware breakpoint, and if that fails, fall through 1943 // and set a software breakpoint? 1944 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 1945 { 1946 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 1947 { 1948 bp_site->SetEnabled(true); 1949 bp_site->SetType (BreakpointSite::eHardware); 1950 return error; 1951 } 1952 } 1953 } 1954 1955 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 1956 { 1957 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 1958 { 1959 bp_site->SetEnabled(true); 1960 bp_site->SetType (BreakpointSite::eExternal); 1961 return error; 1962 } 1963 } 1964 1965 return EnableSoftwareBreakpoint (bp_site); 1966 } 1967 1968 if (log) 1969 { 1970 const char *err_string = error.AsCString(); 1971 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 1972 bp_site->GetLoadAddress(), 1973 err_string ? err_string : "NULL"); 1974 } 1975 // We shouldn't reach here on a successful breakpoint enable... 1976 if (error.Success()) 1977 error.SetErrorToGenericError(); 1978 return error; 1979 } 1980 1981 Error 1982 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 1983 { 1984 Error error; 1985 assert (bp_site != NULL); 1986 addr_t addr = bp_site->GetLoadAddress(); 1987 user_id_t site_id = bp_site->GetID(); 1988 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 1989 if (log) 1990 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 1991 1992 if (bp_site->IsEnabled()) 1993 { 1994 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 1995 1996 BreakpointSite::Type bp_type = bp_site->GetType(); 1997 switch (bp_type) 1998 { 1999 case BreakpointSite::eSoftware: 2000 error = DisableSoftwareBreakpoint (bp_site); 2001 break; 2002 2003 case BreakpointSite::eHardware: 2004 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2005 error.SetErrorToGenericError(); 2006 break; 2007 2008 case BreakpointSite::eExternal: 2009 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2010 error.SetErrorToGenericError(); 2011 break; 2012 } 2013 if (error.Success()) 2014 bp_site->SetEnabled(false); 2015 } 2016 else 2017 { 2018 if (log) 2019 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2020 return error; 2021 } 2022 2023 if (error.Success()) 2024 error.SetErrorToGenericError(); 2025 return error; 2026 } 2027 2028 // Pre-requisite: wp != NULL. 2029 static GDBStoppointType 2030 GetGDBStoppointType (Watchpoint *wp) 2031 { 2032 assert(wp); 2033 bool watch_read = wp->WatchpointRead(); 2034 bool watch_write = wp->WatchpointWrite(); 2035 2036 // watch_read and watch_write cannot both be false. 2037 assert(watch_read || watch_write); 2038 if (watch_read && watch_write) 2039 return eWatchpointReadWrite; 2040 else if (watch_read) 2041 return eWatchpointRead; 2042 else // Must be watch_write, then. 2043 return eWatchpointWrite; 2044 } 2045 2046 Error 2047 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 2048 { 2049 Error error; 2050 if (wp) 2051 { 2052 user_id_t watchID = wp->GetID(); 2053 addr_t addr = wp->GetLoadAddress(); 2054 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2055 if (log) 2056 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 2057 if (wp->IsEnabled()) 2058 { 2059 if (log) 2060 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 2061 return error; 2062 } 2063 2064 GDBStoppointType type = GetGDBStoppointType(wp); 2065 // Pass down an appropriate z/Z packet... 2066 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2067 { 2068 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2069 { 2070 wp->SetEnabled(true); 2071 return error; 2072 } 2073 else 2074 error.SetErrorString("sending gdb watchpoint packet failed"); 2075 } 2076 else 2077 error.SetErrorString("watchpoints not supported"); 2078 } 2079 else 2080 { 2081 error.SetErrorString("Watchpoint argument was NULL."); 2082 } 2083 if (error.Success()) 2084 error.SetErrorToGenericError(); 2085 return error; 2086 } 2087 2088 Error 2089 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 2090 { 2091 Error error; 2092 if (wp) 2093 { 2094 user_id_t watchID = wp->GetID(); 2095 2096 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2097 2098 addr_t addr = wp->GetLoadAddress(); 2099 if (log) 2100 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 2101 2102 if (!wp->IsEnabled()) 2103 { 2104 if (log) 2105 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2106 return error; 2107 } 2108 2109 if (wp->IsHardware()) 2110 { 2111 GDBStoppointType type = GetGDBStoppointType(wp); 2112 // Pass down an appropriate z/Z packet... 2113 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2114 { 2115 wp->SetEnabled(false); 2116 return error; 2117 } 2118 else 2119 error.SetErrorString("sending gdb watchpoint packet failed"); 2120 } 2121 // TODO: clear software watchpoints if we implement them 2122 } 2123 else 2124 { 2125 error.SetErrorString("Watchpoint argument was NULL."); 2126 } 2127 if (error.Success()) 2128 error.SetErrorToGenericError(); 2129 return error; 2130 } 2131 2132 void 2133 ProcessGDBRemote::Clear() 2134 { 2135 m_flags = 0; 2136 m_thread_list.Clear(); 2137 } 2138 2139 Error 2140 ProcessGDBRemote::DoSignal (int signo) 2141 { 2142 Error error; 2143 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2144 if (log) 2145 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2146 2147 if (!m_gdb_comm.SendAsyncSignal (signo)) 2148 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2149 return error; 2150 } 2151 2152 Error 2153 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2154 { 2155 ProcessLaunchInfo launch_info; 2156 return StartDebugserverProcess(debugserver_url, launch_info); 2157 } 2158 2159 Error 2160 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2161 { 2162 Error error; 2163 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2164 { 2165 // If we locate debugserver, keep that located version around 2166 static FileSpec g_debugserver_file_spec; 2167 2168 ProcessLaunchInfo debugserver_launch_info; 2169 char debugserver_path[PATH_MAX]; 2170 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2171 2172 // Always check to see if we have an environment override for the path 2173 // to the debugserver to use and use it if we do. 2174 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2175 if (env_debugserver_path) 2176 debugserver_file_spec.SetFile (env_debugserver_path, false); 2177 else 2178 debugserver_file_spec = g_debugserver_file_spec; 2179 bool debugserver_exists = debugserver_file_spec.Exists(); 2180 if (!debugserver_exists) 2181 { 2182 // The debugserver binary is in the LLDB.framework/Resources 2183 // directory. 2184 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2185 { 2186 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2187 debugserver_exists = debugserver_file_spec.Exists(); 2188 if (debugserver_exists) 2189 { 2190 g_debugserver_file_spec = debugserver_file_spec; 2191 } 2192 else 2193 { 2194 g_debugserver_file_spec.Clear(); 2195 debugserver_file_spec.Clear(); 2196 } 2197 } 2198 } 2199 2200 if (debugserver_exists) 2201 { 2202 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2203 2204 m_stdio_communication.Clear(); 2205 2206 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2207 2208 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2209 char arg_cstr[PATH_MAX]; 2210 2211 // Start args with "debugserver /file/path -r --" 2212 debugserver_args.AppendArgument(debugserver_path); 2213 debugserver_args.AppendArgument(debugserver_url); 2214 // use native registers, not the GDB registers 2215 debugserver_args.AppendArgument("--native-regs"); 2216 // make debugserver run in its own session so signals generated by 2217 // special terminal key sequences (^C) don't affect debugserver 2218 debugserver_args.AppendArgument("--setsid"); 2219 2220 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2221 if (env_debugserver_log_file) 2222 { 2223 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2224 debugserver_args.AppendArgument(arg_cstr); 2225 } 2226 2227 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2228 if (env_debugserver_log_flags) 2229 { 2230 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2231 debugserver_args.AppendArgument(arg_cstr); 2232 } 2233 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2234 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2235 2236 // We currently send down all arguments, attach pids, or attach 2237 // process names in dedicated GDB server packets, so we don't need 2238 // to pass them as arguments. This is currently because of all the 2239 // things we need to setup prior to launching: the environment, 2240 // current working dir, file actions, etc. 2241 #if 0 2242 // Now append the program arguments 2243 if (inferior_argv) 2244 { 2245 // Terminate the debugserver args so we can now append the inferior args 2246 debugserver_args.AppendArgument("--"); 2247 2248 for (int i = 0; inferior_argv[i] != NULL; ++i) 2249 debugserver_args.AppendArgument (inferior_argv[i]); 2250 } 2251 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2252 { 2253 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2254 debugserver_args.AppendArgument (arg_cstr); 2255 } 2256 else if (attach_name && attach_name[0]) 2257 { 2258 if (wait_for_launch) 2259 debugserver_args.AppendArgument ("--waitfor"); 2260 else 2261 debugserver_args.AppendArgument ("--attach"); 2262 debugserver_args.AppendArgument (attach_name); 2263 } 2264 #endif 2265 2266 ProcessLaunchInfo::FileAction file_action; 2267 2268 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2269 // to "/dev/null" if we run into any problems. 2270 file_action.Close (STDIN_FILENO); 2271 debugserver_launch_info.AppendFileAction (file_action); 2272 file_action.Close (STDOUT_FILENO); 2273 debugserver_launch_info.AppendFileAction (file_action); 2274 file_action.Close (STDERR_FILENO); 2275 debugserver_launch_info.AppendFileAction (file_action); 2276 2277 if (log) 2278 { 2279 StreamString strm; 2280 debugserver_args.Dump (&strm); 2281 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2282 } 2283 2284 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2285 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2286 2287 error = Host::LaunchProcess(debugserver_launch_info); 2288 2289 if (error.Success ()) 2290 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2291 else 2292 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2293 2294 if (error.Fail() || log) 2295 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%llu, path='%s'", m_debugserver_pid, debugserver_path); 2296 } 2297 else 2298 { 2299 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2300 } 2301 2302 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2303 StartAsyncThread (); 2304 } 2305 return error; 2306 } 2307 2308 bool 2309 ProcessGDBRemote::MonitorDebugserverProcess 2310 ( 2311 void *callback_baton, 2312 lldb::pid_t debugserver_pid, 2313 bool exited, // True if the process did exit 2314 int signo, // Zero for no signal 2315 int exit_status // Exit value of process if signal is zero 2316 ) 2317 { 2318 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2319 // and might not exist anymore, so we need to carefully try to get the 2320 // target for this process first since we have a race condition when 2321 // we are done running between getting the notice that the inferior 2322 // process has died and the debugserver that was debugging this process. 2323 // In our test suite, we are also continually running process after 2324 // process, so we must be very careful to make sure: 2325 // 1 - process object hasn't been deleted already 2326 // 2 - that a new process object hasn't been recreated in its place 2327 2328 // "debugserver_pid" argument passed in is the process ID for 2329 // debugserver that we are tracking... 2330 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2331 2332 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2333 2334 // Get a shared pointer to the target that has a matching process pointer. 2335 // This target could be gone, or the target could already have a new process 2336 // object inside of it 2337 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2338 2339 if (log) 2340 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%llu, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2341 2342 if (target_sp) 2343 { 2344 // We found a process in a target that matches, but another thread 2345 // might be in the process of launching a new process that will 2346 // soon replace it, so get a shared pointer to the process so we 2347 // can keep it alive. 2348 ProcessSP process_sp (target_sp->GetProcessSP()); 2349 // Now we have a shared pointer to the process that can't go away on us 2350 // so we now make sure it was the same as the one passed in, and also make 2351 // sure that our previous "process *" didn't get deleted and have a new 2352 // "process *" created in its place with the same pointer. To verify this 2353 // we make sure the process has our debugserver process ID. If we pass all 2354 // of these tests, then we are sure that this process is the one we were 2355 // looking for. 2356 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2357 { 2358 // Sleep for a half a second to make sure our inferior process has 2359 // time to set its exit status before we set it incorrectly when 2360 // both the debugserver and the inferior process shut down. 2361 usleep (500000); 2362 // If our process hasn't yet exited, debugserver might have died. 2363 // If the process did exit, the we are reaping it. 2364 const StateType state = process->GetState(); 2365 2366 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2367 state != eStateInvalid && 2368 state != eStateUnloaded && 2369 state != eStateExited && 2370 state != eStateDetached) 2371 { 2372 char error_str[1024]; 2373 if (signo) 2374 { 2375 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2376 if (signal_cstr) 2377 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2378 else 2379 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2380 } 2381 else 2382 { 2383 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2384 } 2385 2386 process->SetExitStatus (-1, error_str); 2387 } 2388 // Debugserver has exited we need to let our ProcessGDBRemote 2389 // know that it no longer has a debugserver instance 2390 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2391 } 2392 } 2393 return true; 2394 } 2395 2396 void 2397 ProcessGDBRemote::KillDebugserverProcess () 2398 { 2399 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2400 { 2401 ::kill (m_debugserver_pid, SIGINT); 2402 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2403 } 2404 } 2405 2406 void 2407 ProcessGDBRemote::Initialize() 2408 { 2409 static bool g_initialized = false; 2410 2411 if (g_initialized == false) 2412 { 2413 g_initialized = true; 2414 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2415 GetPluginDescriptionStatic(), 2416 CreateInstance); 2417 2418 Log::Callbacks log_callbacks = { 2419 ProcessGDBRemoteLog::DisableLog, 2420 ProcessGDBRemoteLog::EnableLog, 2421 ProcessGDBRemoteLog::ListLogCategories 2422 }; 2423 2424 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2425 } 2426 } 2427 2428 bool 2429 ProcessGDBRemote::StartAsyncThread () 2430 { 2431 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2432 2433 if (log) 2434 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2435 2436 // Create a thread that watches our internal state and controls which 2437 // events make it to clients (into the DCProcess event queue). 2438 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2439 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2440 } 2441 2442 void 2443 ProcessGDBRemote::StopAsyncThread () 2444 { 2445 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2446 2447 if (log) 2448 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2449 2450 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2451 2452 // This will shut down the async thread. 2453 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2454 2455 // Stop the stdio thread 2456 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2457 { 2458 Host::ThreadJoin (m_async_thread, NULL, NULL); 2459 } 2460 } 2461 2462 2463 void * 2464 ProcessGDBRemote::AsyncThread (void *arg) 2465 { 2466 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2467 2468 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2469 if (log) 2470 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2471 2472 Listener listener ("ProcessGDBRemote::AsyncThread"); 2473 EventSP event_sp; 2474 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2475 eBroadcastBitAsyncThreadShouldExit; 2476 2477 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2478 { 2479 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2480 2481 bool done = false; 2482 while (!done) 2483 { 2484 if (log) 2485 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2486 if (listener.WaitForEvent (NULL, event_sp)) 2487 { 2488 const uint32_t event_type = event_sp->GetType(); 2489 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2490 { 2491 if (log) 2492 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2493 2494 switch (event_type) 2495 { 2496 case eBroadcastBitAsyncContinue: 2497 { 2498 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2499 2500 if (continue_packet) 2501 { 2502 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2503 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2504 if (log) 2505 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2506 2507 if (::strstr (continue_cstr, "vAttach") == NULL) 2508 process->SetPrivateState(eStateRunning); 2509 StringExtractorGDBRemote response; 2510 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2511 2512 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2513 // The thread ID list might be contained within the "response", or the stop reply packet that 2514 // caused the stop. So clear it now before we give the stop reply packet to the process 2515 // using the process->SetLastStopPacket()... 2516 process->ClearThreadIDList (); 2517 2518 switch (stop_state) 2519 { 2520 case eStateStopped: 2521 case eStateCrashed: 2522 case eStateSuspended: 2523 process->SetLastStopPacket (response); 2524 process->SetPrivateState (stop_state); 2525 break; 2526 2527 case eStateExited: 2528 process->SetLastStopPacket (response); 2529 process->ClearThreadIDList(); 2530 response.SetFilePos(1); 2531 process->SetExitStatus(response.GetHexU8(), NULL); 2532 done = true; 2533 break; 2534 2535 case eStateInvalid: 2536 process->SetExitStatus(-1, "lost connection"); 2537 break; 2538 2539 default: 2540 process->SetPrivateState (stop_state); 2541 break; 2542 } 2543 } 2544 } 2545 break; 2546 2547 case eBroadcastBitAsyncThreadShouldExit: 2548 if (log) 2549 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2550 done = true; 2551 break; 2552 2553 default: 2554 if (log) 2555 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2556 done = true; 2557 break; 2558 } 2559 } 2560 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2561 { 2562 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2563 { 2564 process->SetExitStatus (-1, "lost connection"); 2565 done = true; 2566 } 2567 } 2568 } 2569 else 2570 { 2571 if (log) 2572 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2573 done = true; 2574 } 2575 } 2576 } 2577 2578 if (log) 2579 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2580 2581 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2582 return NULL; 2583 } 2584 2585 const char * 2586 ProcessGDBRemote::GetDispatchQueueNameForThread 2587 ( 2588 addr_t thread_dispatch_qaddr, 2589 std::string &dispatch_queue_name 2590 ) 2591 { 2592 dispatch_queue_name.clear(); 2593 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2594 { 2595 // Cache the dispatch_queue_offsets_addr value so we don't always have 2596 // to look it up 2597 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2598 { 2599 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2600 const Symbol *dispatch_queue_offsets_symbol = NULL; 2601 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2602 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2603 if (module_sp) 2604 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2605 2606 if (dispatch_queue_offsets_symbol == NULL) 2607 { 2608 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2609 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2610 if (module_sp) 2611 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2612 } 2613 if (dispatch_queue_offsets_symbol) 2614 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2615 2616 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2617 return NULL; 2618 } 2619 2620 uint8_t memory_buffer[8]; 2621 DataExtractor data (memory_buffer, 2622 sizeof(memory_buffer), 2623 m_target.GetArchitecture().GetByteOrder(), 2624 m_target.GetArchitecture().GetAddressByteSize()); 2625 2626 // Excerpt from src/queue_private.h 2627 struct dispatch_queue_offsets_s 2628 { 2629 uint16_t dqo_version; 2630 uint16_t dqo_label; 2631 uint16_t dqo_label_size; 2632 } dispatch_queue_offsets; 2633 2634 2635 Error error; 2636 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2637 { 2638 uint32_t data_offset = 0; 2639 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2640 { 2641 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2642 { 2643 data_offset = 0; 2644 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2645 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2646 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2647 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2648 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2649 dispatch_queue_name.erase (bytes_read); 2650 } 2651 } 2652 } 2653 } 2654 if (dispatch_queue_name.empty()) 2655 return NULL; 2656 return dispatch_queue_name.c_str(); 2657 } 2658 2659 //uint32_t 2660 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2661 //{ 2662 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2663 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2664 // if (m_local_debugserver) 2665 // { 2666 // return Host::ListProcessesMatchingName (name, matches, pids); 2667 // } 2668 // else 2669 // { 2670 // // FIXME: Implement talking to the remote debugserver. 2671 // return 0; 2672 // } 2673 // 2674 //} 2675 // 2676 bool 2677 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2678 lldb_private::StoppointCallbackContext *context, 2679 lldb::user_id_t break_id, 2680 lldb::user_id_t break_loc_id) 2681 { 2682 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2683 // run so I can stop it if that's what I want to do. 2684 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2685 if (log) 2686 log->Printf("Hit New Thread Notification breakpoint."); 2687 return false; 2688 } 2689 2690 2691 bool 2692 ProcessGDBRemote::StartNoticingNewThreads() 2693 { 2694 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2695 if (m_thread_create_bp_sp) 2696 { 2697 if (log && log->GetVerbose()) 2698 log->Printf("Enabled noticing new thread breakpoint."); 2699 m_thread_create_bp_sp->SetEnabled(true); 2700 } 2701 else 2702 { 2703 PlatformSP platform_sp (m_target.GetPlatform()); 2704 if (platform_sp) 2705 { 2706 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2707 if (m_thread_create_bp_sp) 2708 { 2709 if (log && log->GetVerbose()) 2710 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2711 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2712 } 2713 else 2714 { 2715 if (log) 2716 log->Printf("Failed to create new thread notification breakpoint."); 2717 } 2718 } 2719 } 2720 return m_thread_create_bp_sp.get() != NULL; 2721 } 2722 2723 bool 2724 ProcessGDBRemote::StopNoticingNewThreads() 2725 { 2726 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2727 if (log && log->GetVerbose()) 2728 log->Printf ("Disabling new thread notification breakpoint."); 2729 2730 if (m_thread_create_bp_sp) 2731 m_thread_create_bp_sp->SetEnabled(false); 2732 2733 return true; 2734 } 2735 2736 2737