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 "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 51 #include "Utility/StringExtractorGDBRemote.h" 52 #include "GDBRemoteRegisterContext.h" 53 #include "ProcessGDBRemote.h" 54 #include "ProcessGDBRemoteLog.h" 55 #include "ThreadGDBRemote.h" 56 #include "StopInfoMachException.h" 57 58 namespace lldb 59 { 60 // Provide a function that can easily dump the packet history if we know a 61 // ProcessGDBRemote * value (which we can get from logs or from debugging). 62 // We need the function in the lldb namespace so it makes it into the final 63 // executable since the LLDB shared library only exports stuff in the lldb 64 // namespace. This allows you to attach with a debugger and call this 65 // function and get the packet history dumped to a file. 66 void 67 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 68 { 69 lldb_private::StreamFile strm; 70 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 71 if (error.Success()) 72 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 73 } 74 } 75 76 77 #define DEBUGSERVER_BASENAME "debugserver" 78 using namespace lldb; 79 using namespace lldb_private; 80 81 static bool rand_initialized = false; 82 83 static inline uint16_t 84 get_random_port () 85 { 86 if (!rand_initialized) 87 { 88 time_t seed = time(NULL); 89 90 rand_initialized = true; 91 srand(seed); 92 } 93 return (rand() % (UINT16_MAX - 1000u)) + 1000u; 94 } 95 96 97 const char * 98 ProcessGDBRemote::GetPluginNameStatic() 99 { 100 return "gdb-remote"; 101 } 102 103 const char * 104 ProcessGDBRemote::GetPluginDescriptionStatic() 105 { 106 return "GDB Remote protocol based debugging plug-in."; 107 } 108 109 void 110 ProcessGDBRemote::Terminate() 111 { 112 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 113 } 114 115 116 lldb::ProcessSP 117 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 118 { 119 lldb::ProcessSP process_sp; 120 if (crash_file_path == NULL) 121 process_sp.reset (new ProcessGDBRemote (target, listener)); 122 return process_sp; 123 } 124 125 bool 126 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 127 { 128 if (plugin_specified_by_name) 129 return true; 130 131 // For now we are just making sure the file exists for a given module 132 Module *exe_module = target.GetExecutableModulePointer(); 133 if (exe_module) 134 { 135 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 136 // We can't debug core files... 137 switch (exe_objfile->GetType()) 138 { 139 case ObjectFile::eTypeInvalid: 140 case ObjectFile::eTypeCoreFile: 141 case ObjectFile::eTypeDebugInfo: 142 case ObjectFile::eTypeObjectFile: 143 case ObjectFile::eTypeSharedLibrary: 144 case ObjectFile::eTypeStubLibrary: 145 return false; 146 case ObjectFile::eTypeExecutable: 147 case ObjectFile::eTypeDynamicLinker: 148 case ObjectFile::eTypeUnknown: 149 break; 150 } 151 return exe_module->GetFileSpec().Exists(); 152 } 153 // However, if there is no executable module, we return true since we might be preparing to attach. 154 return true; 155 } 156 157 //---------------------------------------------------------------------- 158 // ProcessGDBRemote constructor 159 //---------------------------------------------------------------------- 160 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 161 Process (target, listener), 162 m_flags (0), 163 m_gdb_comm(false), 164 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 165 m_last_stop_packet (), 166 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 167 m_register_info (), 168 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 169 m_async_thread (LLDB_INVALID_HOST_THREAD), 170 m_thread_ids (), 171 m_continue_c_tids (), 172 m_continue_C_tids (), 173 m_continue_s_tids (), 174 m_continue_S_tids (), 175 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 176 m_max_memory_size (512), 177 m_addr_to_mmap_size (), 178 m_thread_create_bp_sp (), 179 m_waiting_for_attach (false), 180 m_destroy_tried_resuming (false) 181 { 182 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 183 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 184 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 185 } 186 187 //---------------------------------------------------------------------- 188 // Destructor 189 //---------------------------------------------------------------------- 190 ProcessGDBRemote::~ProcessGDBRemote() 191 { 192 // m_mach_process.UnregisterNotificationCallbacks (this); 193 Clear(); 194 // We need to call finalize on the process before destroying ourselves 195 // to make sure all of the broadcaster cleanup goes as planned. If we 196 // destruct this class, then Process::~Process() might have problems 197 // trying to fully destroy the broadcaster. 198 Finalize(); 199 } 200 201 //---------------------------------------------------------------------- 202 // PluginInterface 203 //---------------------------------------------------------------------- 204 const char * 205 ProcessGDBRemote::GetPluginName() 206 { 207 return "Process debugging plug-in that uses the GDB remote protocol"; 208 } 209 210 const char * 211 ProcessGDBRemote::GetShortPluginName() 212 { 213 return GetPluginNameStatic(); 214 } 215 216 uint32_t 217 ProcessGDBRemote::GetPluginVersion() 218 { 219 return 1; 220 } 221 222 void 223 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 224 { 225 if (!force && m_register_info.GetNumRegisters() > 0) 226 return; 227 228 char packet[128]; 229 m_register_info.Clear(); 230 uint32_t reg_offset = 0; 231 uint32_t reg_num = 0; 232 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 233 response_type == StringExtractorGDBRemote::eResponse; 234 ++reg_num) 235 { 236 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 237 assert (packet_len < sizeof(packet)); 238 StringExtractorGDBRemote response; 239 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 240 { 241 response_type = response.GetResponseType(); 242 if (response_type == StringExtractorGDBRemote::eResponse) 243 { 244 std::string name; 245 std::string value; 246 ConstString reg_name; 247 ConstString alt_name; 248 ConstString set_name; 249 RegisterInfo reg_info = { NULL, // Name 250 NULL, // Alt name 251 0, // byte size 252 reg_offset, // offset 253 eEncodingUint, // encoding 254 eFormatHex, // formate 255 { 256 LLDB_INVALID_REGNUM, // GCC reg num 257 LLDB_INVALID_REGNUM, // DWARF reg num 258 LLDB_INVALID_REGNUM, // generic reg num 259 reg_num, // GDB reg num 260 reg_num // native register number 261 }, 262 NULL, 263 NULL 264 }; 265 266 while (response.GetNameColonValue(name, value)) 267 { 268 if (name.compare("name") == 0) 269 { 270 reg_name.SetCString(value.c_str()); 271 } 272 else if (name.compare("alt-name") == 0) 273 { 274 alt_name.SetCString(value.c_str()); 275 } 276 else if (name.compare("bitsize") == 0) 277 { 278 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 279 } 280 else if (name.compare("offset") == 0) 281 { 282 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 283 if (reg_offset != offset) 284 { 285 reg_offset = offset; 286 } 287 } 288 else if (name.compare("encoding") == 0) 289 { 290 if (value.compare("uint") == 0) 291 reg_info.encoding = eEncodingUint; 292 else if (value.compare("sint") == 0) 293 reg_info.encoding = eEncodingSint; 294 else if (value.compare("ieee754") == 0) 295 reg_info.encoding = eEncodingIEEE754; 296 else if (value.compare("vector") == 0) 297 reg_info.encoding = eEncodingVector; 298 } 299 else if (name.compare("format") == 0) 300 { 301 if (value.compare("binary") == 0) 302 reg_info.format = eFormatBinary; 303 else if (value.compare("decimal") == 0) 304 reg_info.format = eFormatDecimal; 305 else if (value.compare("hex") == 0) 306 reg_info.format = eFormatHex; 307 else if (value.compare("float") == 0) 308 reg_info.format = eFormatFloat; 309 else if (value.compare("vector-sint8") == 0) 310 reg_info.format = eFormatVectorOfSInt8; 311 else if (value.compare("vector-uint8") == 0) 312 reg_info.format = eFormatVectorOfUInt8; 313 else if (value.compare("vector-sint16") == 0) 314 reg_info.format = eFormatVectorOfSInt16; 315 else if (value.compare("vector-uint16") == 0) 316 reg_info.format = eFormatVectorOfUInt16; 317 else if (value.compare("vector-sint32") == 0) 318 reg_info.format = eFormatVectorOfSInt32; 319 else if (value.compare("vector-uint32") == 0) 320 reg_info.format = eFormatVectorOfUInt32; 321 else if (value.compare("vector-float32") == 0) 322 reg_info.format = eFormatVectorOfFloat32; 323 else if (value.compare("vector-uint128") == 0) 324 reg_info.format = eFormatVectorOfUInt128; 325 } 326 else if (name.compare("set") == 0) 327 { 328 set_name.SetCString(value.c_str()); 329 } 330 else if (name.compare("gcc") == 0) 331 { 332 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 333 } 334 else if (name.compare("dwarf") == 0) 335 { 336 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 337 } 338 else if (name.compare("generic") == 0) 339 { 340 if (value.compare("pc") == 0) 341 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; 342 else if (value.compare("sp") == 0) 343 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; 344 else if (value.compare("fp") == 0) 345 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; 346 else if (value.compare("ra") == 0) 347 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; 348 else if (value.compare("flags") == 0) 349 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS; 350 else if (value.find("arg") == 0) 351 { 352 if (value.size() == 4) 353 { 354 switch (value[3]) 355 { 356 case '1': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG1; break; 357 case '2': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG2; break; 358 case '3': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG3; break; 359 case '4': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG4; break; 360 case '5': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG5; break; 361 case '6': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG6; break; 362 case '7': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG7; break; 363 case '8': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG8; break; 364 } 365 } 366 } 367 } 368 } 369 370 reg_info.byte_offset = reg_offset; 371 assert (reg_info.byte_size != 0); 372 reg_offset += reg_info.byte_size; 373 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 374 } 375 } 376 else 377 { 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 || (remote_arch.IsValid() && remote_arch.GetMachine() == llvm::Triple::x86_64)) 406 m_register_info.Addx86_64ConvenienceRegisters(); 407 408 // At this point, we can finalize our register info. 409 m_register_info.Finalize (); 410 } 411 412 Error 413 ProcessGDBRemote::WillLaunch (Module* module) 414 { 415 return WillLaunchOrAttach (); 416 } 417 418 Error 419 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 420 { 421 return WillLaunchOrAttach (); 422 } 423 424 Error 425 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 426 { 427 return WillLaunchOrAttach (); 428 } 429 430 Error 431 ProcessGDBRemote::DoConnectRemote (const char *remote_url) 432 { 433 Error error (WillLaunchOrAttach ()); 434 435 if (error.Fail()) 436 return error; 437 438 error = ConnectToDebugserver (remote_url); 439 440 if (error.Fail()) 441 return error; 442 StartAsyncThread (); 443 444 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 445 if (pid == LLDB_INVALID_PROCESS_ID) 446 { 447 // We don't have a valid process ID, so note that we are connected 448 // and could now request to launch or attach, or get remote process 449 // listings... 450 SetPrivateState (eStateConnected); 451 } 452 else 453 { 454 // We have a valid process 455 SetID (pid); 456 GetThreadList(); 457 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 458 { 459 const StateType state = SetThreadStopInfo (m_last_stop_packet); 460 if (state == eStateStopped) 461 { 462 SetPrivateState (state); 463 } 464 else 465 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 466 } 467 else 468 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 469 } 470 471 if (error.Success() 472 && !GetTarget().GetArchitecture().IsValid() 473 && m_gdb_comm.GetHostArchitecture().IsValid()) 474 { 475 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 476 } 477 478 return error; 479 } 480 481 Error 482 ProcessGDBRemote::WillLaunchOrAttach () 483 { 484 Error error; 485 m_stdio_communication.Clear (); 486 return error; 487 } 488 489 //---------------------------------------------------------------------- 490 // Process Control 491 //---------------------------------------------------------------------- 492 Error 493 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 494 { 495 Error error; 496 497 uint32_t launch_flags = launch_info.GetFlags().Get(); 498 const char *stdin_path = NULL; 499 const char *stdout_path = NULL; 500 const char *stderr_path = NULL; 501 const char *working_dir = launch_info.GetWorkingDirectory(); 502 503 const ProcessLaunchInfo::FileAction *file_action; 504 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 505 if (file_action) 506 { 507 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 508 stdin_path = file_action->GetPath(); 509 } 510 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 511 if (file_action) 512 { 513 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 514 stdout_path = file_action->GetPath(); 515 } 516 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 517 if (file_action) 518 { 519 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 520 stderr_path = file_action->GetPath(); 521 } 522 523 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 524 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 525 // ::LogSetLogFile ("/dev/stdout"); 526 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 527 528 ObjectFile * object_file = exe_module->GetObjectFile(); 529 if (object_file) 530 { 531 char host_port[128]; 532 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 533 char connect_url[128]; 534 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 535 536 // Make sure we aren't already connected? 537 if (!m_gdb_comm.IsConnected()) 538 { 539 error = StartDebugserverProcess (host_port, launch_info); 540 if (error.Fail()) 541 { 542 if (log) 543 log->Printf("failed to start debugserver process: %s", error.AsCString()); 544 return error; 545 } 546 547 error = ConnectToDebugserver (connect_url); 548 } 549 550 if (error.Success()) 551 { 552 lldb_utility::PseudoTerminal pty; 553 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 554 555 // If the debugserver is local and we aren't disabling STDIO, lets use 556 // a pseudo terminal to instead of relying on the 'O' packets for stdio 557 // since 'O' packets can really slow down debugging if the inferior 558 // does a lot of output. 559 PlatformSP platform_sp (m_target.GetPlatform()); 560 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 561 { 562 const char *slave_name = NULL; 563 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 564 { 565 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 566 slave_name = pty.GetSlaveName (NULL, 0); 567 } 568 if (stdin_path == NULL) 569 stdin_path = slave_name; 570 571 if (stdout_path == NULL) 572 stdout_path = slave_name; 573 574 if (stderr_path == NULL) 575 stderr_path = slave_name; 576 } 577 578 // Set STDIN to /dev/null if we want STDIO disabled or if either 579 // STDOUT or STDERR have been set to something and STDIN hasn't 580 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 581 stdin_path = "/dev/null"; 582 583 // Set STDOUT to /dev/null if we want STDIO disabled or if either 584 // STDIN or STDERR have been set to something and STDOUT hasn't 585 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 586 stdout_path = "/dev/null"; 587 588 // Set STDERR to /dev/null if we want STDIO disabled or if either 589 // STDIN or STDOUT have been set to something and STDERR hasn't 590 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 591 stderr_path = "/dev/null"; 592 593 if (stdin_path) 594 m_gdb_comm.SetSTDIN (stdin_path); 595 if (stdout_path) 596 m_gdb_comm.SetSTDOUT (stdout_path); 597 if (stderr_path) 598 m_gdb_comm.SetSTDERR (stderr_path); 599 600 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 601 602 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 603 604 if (working_dir && working_dir[0]) 605 { 606 m_gdb_comm.SetWorkingDir (working_dir); 607 } 608 609 // Send the environment and the program + arguments after we connect 610 const Args &environment = launch_info.GetEnvironmentEntries(); 611 if (environment.GetArgumentCount()) 612 { 613 size_t num_environment_entries = environment.GetArgumentCount(); 614 for (size_t i=0; i<num_environment_entries; ++i) 615 { 616 const char *env_entry = environment.GetArgumentAtIndex(i); 617 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 618 break; 619 } 620 } 621 622 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 623 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 624 if (arg_packet_err == 0) 625 { 626 std::string error_str; 627 if (m_gdb_comm.GetLaunchSuccess (error_str)) 628 { 629 SetID (m_gdb_comm.GetCurrentProcessID ()); 630 } 631 else 632 { 633 error.SetErrorString (error_str.c_str()); 634 } 635 } 636 else 637 { 638 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 639 } 640 641 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 642 643 if (GetID() == LLDB_INVALID_PROCESS_ID) 644 { 645 if (log) 646 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 647 KillDebugserverProcess (); 648 return error; 649 } 650 651 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 652 { 653 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 654 655 if (!disable_stdio) 656 { 657 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 658 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 659 } 660 } 661 } 662 else 663 { 664 if (log) 665 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 666 } 667 } 668 else 669 { 670 // Set our user ID to an invalid process ID. 671 SetID(LLDB_INVALID_PROCESS_ID); 672 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 673 exe_module->GetFileSpec().GetFilename().AsCString(), 674 exe_module->GetArchitecture().GetArchitectureName()); 675 } 676 return error; 677 678 } 679 680 681 Error 682 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 683 { 684 Error error; 685 // Sleep and wait a bit for debugserver to start to listen... 686 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 687 if (conn_ap.get()) 688 { 689 const uint32_t max_retry_count = 50; 690 uint32_t retry_count = 0; 691 while (!m_gdb_comm.IsConnected()) 692 { 693 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 694 { 695 m_gdb_comm.SetConnection (conn_ap.release()); 696 break; 697 } 698 retry_count++; 699 700 if (retry_count >= max_retry_count) 701 break; 702 703 usleep (100000); 704 } 705 } 706 707 if (!m_gdb_comm.IsConnected()) 708 { 709 if (error.Success()) 710 error.SetErrorString("not connected to remote gdb server"); 711 return error; 712 } 713 714 // We always seem to be able to open a connection to a local port 715 // so we need to make sure we can then send data to it. If we can't 716 // then we aren't actually connected to anything, so try and do the 717 // handshake with the remote GDB server and make sure that goes 718 // alright. 719 if (!m_gdb_comm.HandshakeWithServer (NULL)) 720 { 721 m_gdb_comm.Disconnect(); 722 if (error.Success()) 723 error.SetErrorString("not connected to remote gdb server"); 724 return error; 725 } 726 m_gdb_comm.ResetDiscoverableSettings(); 727 m_gdb_comm.QueryNoAckModeSupported (); 728 m_gdb_comm.GetThreadSuffixSupported (); 729 m_gdb_comm.GetListThreadsInStopReplySupported (); 730 m_gdb_comm.GetHostInfo (); 731 m_gdb_comm.GetVContSupported ('c'); 732 733 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 734 for (size_t idx = 0; idx < num_cmds; idx++) 735 { 736 StringExtractorGDBRemote response; 737 printf ("Sending command: \%s.\n", GetExtraStartupCommands().GetArgumentAtIndex(idx)); 738 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 739 } 740 return error; 741 } 742 743 void 744 ProcessGDBRemote::DidLaunchOrAttach () 745 { 746 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 747 if (log) 748 log->Printf ("ProcessGDBRemote::DidLaunch()"); 749 if (GetID() != LLDB_INVALID_PROCESS_ID) 750 { 751 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 752 753 BuildDynamicRegisterInfo (false); 754 755 // See if the GDB server supports the qHostInfo information 756 757 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 758 if (gdb_remote_arch.IsValid()) 759 { 760 ArchSpec &target_arch = GetTarget().GetArchitecture(); 761 762 if (target_arch.IsValid()) 763 { 764 // If the remote host is ARM and we have apple as the vendor, then 765 // ARM executables and shared libraries can have mixed ARM architectures. 766 // You can have an armv6 executable, and if the host is armv7, then the 767 // system will load the best possible architecture for all shared libraries 768 // it has, so we really need to take the remote host architecture as our 769 // defacto architecture in this case. 770 771 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 772 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 773 { 774 target_arch = gdb_remote_arch; 775 } 776 else 777 { 778 // Fill in what is missing in the triple 779 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 780 llvm::Triple &target_triple = target_arch.GetTriple(); 781 if (target_triple.getVendorName().size() == 0) 782 { 783 target_triple.setVendor (remote_triple.getVendor()); 784 785 if (target_triple.getOSName().size() == 0) 786 { 787 target_triple.setOS (remote_triple.getOS()); 788 789 if (target_triple.getEnvironmentName().size() == 0) 790 target_triple.setEnvironment (remote_triple.getEnvironment()); 791 } 792 } 793 } 794 } 795 else 796 { 797 // The target doesn't have a valid architecture yet, set it from 798 // the architecture we got from the remote GDB server 799 target_arch = gdb_remote_arch; 800 } 801 } 802 } 803 } 804 805 void 806 ProcessGDBRemote::DidLaunch () 807 { 808 DidLaunchOrAttach (); 809 } 810 811 Error 812 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 813 { 814 ProcessAttachInfo attach_info; 815 return DoAttachToProcessWithID(attach_pid, attach_info); 816 } 817 818 Error 819 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 820 { 821 Error error; 822 // Clear out and clean up from any current state 823 Clear(); 824 if (attach_pid != LLDB_INVALID_PROCESS_ID) 825 { 826 // Make sure we aren't already connected? 827 if (!m_gdb_comm.IsConnected()) 828 { 829 char host_port[128]; 830 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 831 char connect_url[128]; 832 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 833 834 error = StartDebugserverProcess (host_port, attach_info); 835 836 if (error.Fail()) 837 { 838 const char *error_string = error.AsCString(); 839 if (error_string == NULL) 840 error_string = "unable to launch " DEBUGSERVER_BASENAME; 841 842 SetExitStatus (-1, error_string); 843 } 844 else 845 { 846 error = ConnectToDebugserver (connect_url); 847 } 848 } 849 850 if (error.Success()) 851 { 852 char packet[64]; 853 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%llx", attach_pid); 854 SetID (attach_pid); 855 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 856 } 857 } 858 return error; 859 } 860 861 size_t 862 ProcessGDBRemote::AttachInputReaderCallback 863 ( 864 void *baton, 865 InputReader *reader, 866 lldb::InputReaderAction notification, 867 const char *bytes, 868 size_t bytes_len 869 ) 870 { 871 if (notification == eInputReaderGotToken) 872 { 873 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 874 if (gdb_process->m_waiting_for_attach) 875 gdb_process->m_waiting_for_attach = false; 876 reader->SetIsDone(true); 877 return 1; 878 } 879 return 0; 880 } 881 882 Error 883 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 884 { 885 Error error; 886 // Clear out and clean up from any current state 887 Clear(); 888 889 if (process_name && process_name[0]) 890 { 891 // Make sure we aren't already connected? 892 if (!m_gdb_comm.IsConnected()) 893 { 894 char host_port[128]; 895 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 896 char connect_url[128]; 897 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 898 899 error = StartDebugserverProcess (host_port, attach_info); 900 if (error.Fail()) 901 { 902 const char *error_string = error.AsCString(); 903 if (error_string == NULL) 904 error_string = "unable to launch " DEBUGSERVER_BASENAME; 905 906 SetExitStatus (-1, error_string); 907 } 908 else 909 { 910 error = ConnectToDebugserver (connect_url); 911 } 912 } 913 914 if (error.Success()) 915 { 916 StreamString packet; 917 918 if (wait_for_launch) 919 packet.PutCString("vAttachWait"); 920 else 921 packet.PutCString("vAttachName"); 922 packet.PutChar(';'); 923 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 924 925 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 926 927 } 928 } 929 return error; 930 } 931 932 933 void 934 ProcessGDBRemote::DidAttach () 935 { 936 DidLaunchOrAttach (); 937 } 938 939 Error 940 ProcessGDBRemote::WillResume () 941 { 942 m_continue_c_tids.clear(); 943 m_continue_C_tids.clear(); 944 m_continue_s_tids.clear(); 945 m_continue_S_tids.clear(); 946 return Error(); 947 } 948 949 Error 950 ProcessGDBRemote::DoResume () 951 { 952 Error error; 953 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 954 if (log) 955 log->Printf ("ProcessGDBRemote::Resume()"); 956 957 Listener listener ("gdb-remote.resume-packet-sent"); 958 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 959 { 960 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 961 962 StreamString continue_packet; 963 bool continue_packet_error = false; 964 if (m_gdb_comm.HasAnyVContSupport ()) 965 { 966 continue_packet.PutCString ("vCont"); 967 968 if (!m_continue_c_tids.empty()) 969 { 970 if (m_gdb_comm.GetVContSupported ('c')) 971 { 972 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) 973 continue_packet.Printf(";c:%4.4llx", *t_pos); 974 } 975 else 976 continue_packet_error = true; 977 } 978 979 if (!continue_packet_error && !m_continue_C_tids.empty()) 980 { 981 if (m_gdb_comm.GetVContSupported ('C')) 982 { 983 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) 984 continue_packet.Printf(";C%2.2x:%4.4llx", s_pos->second, s_pos->first); 985 } 986 else 987 continue_packet_error = true; 988 } 989 990 if (!continue_packet_error && !m_continue_s_tids.empty()) 991 { 992 if (m_gdb_comm.GetVContSupported ('s')) 993 { 994 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) 995 continue_packet.Printf(";s:%4.4llx", *t_pos); 996 } 997 else 998 continue_packet_error = true; 999 } 1000 1001 if (!continue_packet_error && !m_continue_S_tids.empty()) 1002 { 1003 if (m_gdb_comm.GetVContSupported ('S')) 1004 { 1005 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) 1006 continue_packet.Printf(";S%2.2x:%4.4llx", s_pos->second, s_pos->first); 1007 } 1008 else 1009 continue_packet_error = true; 1010 } 1011 1012 if (continue_packet_error) 1013 continue_packet.GetString().clear(); 1014 } 1015 else 1016 continue_packet_error = true; 1017 1018 if (continue_packet_error) 1019 { 1020 // Either no vCont support, or we tried to use part of the vCont 1021 // packet that wasn't supported by the remote GDB server. 1022 // We need to try and make a simple packet that can do our continue 1023 const size_t num_threads = GetThreadList().GetSize(); 1024 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1025 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1026 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1027 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1028 if (num_continue_c_tids > 0) 1029 { 1030 if (num_continue_c_tids == num_threads) 1031 { 1032 // All threads are resuming... 1033 m_gdb_comm.SetCurrentThreadForRun (-1); 1034 continue_packet.PutChar ('c'); 1035 continue_packet_error = false; 1036 } 1037 else if (num_continue_c_tids == 1 && 1038 num_continue_C_tids == 0 && 1039 num_continue_s_tids == 0 && 1040 num_continue_S_tids == 0 ) 1041 { 1042 // Only one thread is continuing 1043 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1044 continue_packet.PutChar ('c'); 1045 continue_packet_error = false; 1046 } 1047 } 1048 1049 if (continue_packet_error && num_continue_C_tids > 0) 1050 { 1051 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1052 num_continue_C_tids > 0 && 1053 num_continue_s_tids == 0 && 1054 num_continue_S_tids == 0 ) 1055 { 1056 const int continue_signo = m_continue_C_tids.front().second; 1057 // Only one thread is continuing 1058 if (num_continue_C_tids > 1) 1059 { 1060 // More that one thread with a signal, yet we don't have 1061 // vCont support and we are being asked to resume each 1062 // thread with a signal, we need to make sure they are 1063 // all the same signal, or we can't issue the continue 1064 // accurately with the current support... 1065 if (num_continue_C_tids > 1) 1066 { 1067 continue_packet_error = false; 1068 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1069 { 1070 if (m_continue_C_tids[i].second != continue_signo) 1071 continue_packet_error = true; 1072 } 1073 } 1074 if (!continue_packet_error) 1075 m_gdb_comm.SetCurrentThreadForRun (-1); 1076 } 1077 else 1078 { 1079 // Set the continue thread ID 1080 continue_packet_error = false; 1081 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1082 } 1083 if (!continue_packet_error) 1084 { 1085 // Add threads continuing with the same signo... 1086 continue_packet.Printf("C%2.2x", continue_signo); 1087 } 1088 } 1089 } 1090 1091 if (continue_packet_error && num_continue_s_tids > 0) 1092 { 1093 if (num_continue_s_tids == num_threads) 1094 { 1095 // All threads are resuming... 1096 m_gdb_comm.SetCurrentThreadForRun (-1); 1097 continue_packet.PutChar ('s'); 1098 continue_packet_error = false; 1099 } 1100 else if (num_continue_c_tids == 0 && 1101 num_continue_C_tids == 0 && 1102 num_continue_s_tids == 1 && 1103 num_continue_S_tids == 0 ) 1104 { 1105 // Only one thread is stepping 1106 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1107 continue_packet.PutChar ('s'); 1108 continue_packet_error = false; 1109 } 1110 } 1111 1112 if (!continue_packet_error && num_continue_S_tids > 0) 1113 { 1114 if (num_continue_S_tids == num_threads) 1115 { 1116 const int step_signo = m_continue_S_tids.front().second; 1117 // Are all threads trying to step with the same signal? 1118 continue_packet_error = false; 1119 if (num_continue_S_tids > 1) 1120 { 1121 for (size_t i=1; i<num_threads; ++i) 1122 { 1123 if (m_continue_S_tids[i].second != step_signo) 1124 continue_packet_error = true; 1125 } 1126 } 1127 if (!continue_packet_error) 1128 { 1129 // Add threads stepping with the same signo... 1130 m_gdb_comm.SetCurrentThreadForRun (-1); 1131 continue_packet.Printf("S%2.2x", step_signo); 1132 } 1133 } 1134 else if (num_continue_c_tids == 0 && 1135 num_continue_C_tids == 0 && 1136 num_continue_s_tids == 0 && 1137 num_continue_S_tids == 1 ) 1138 { 1139 // Only one thread is stepping with signal 1140 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1141 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1142 continue_packet_error = false; 1143 } 1144 } 1145 } 1146 1147 if (continue_packet_error) 1148 { 1149 error.SetErrorString ("can't make continue packet for this resume"); 1150 } 1151 else 1152 { 1153 EventSP event_sp; 1154 TimeValue timeout; 1155 timeout = TimeValue::Now(); 1156 timeout.OffsetWithSeconds (5); 1157 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1158 { 1159 error.SetErrorString ("Trying to resume but the async thread is dead."); 1160 if (log) 1161 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1162 return error; 1163 } 1164 1165 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1166 1167 if (listener.WaitForEvent (&timeout, event_sp) == false) 1168 { 1169 error.SetErrorString("Resume timed out."); 1170 if (log) 1171 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1172 } 1173 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1174 { 1175 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1176 if (log) 1177 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1178 return error; 1179 } 1180 } 1181 } 1182 1183 return error; 1184 } 1185 1186 void 1187 ProcessGDBRemote::ClearThreadIDList () 1188 { 1189 Mutex::Locker locker(m_thread_list.GetMutex()); 1190 m_thread_ids.clear(); 1191 } 1192 1193 bool 1194 ProcessGDBRemote::UpdateThreadIDList () 1195 { 1196 Mutex::Locker locker(m_thread_list.GetMutex()); 1197 bool sequence_mutex_unavailable = false; 1198 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1199 if (sequence_mutex_unavailable) 1200 { 1201 return false; // We just didn't get the list 1202 } 1203 return true; 1204 } 1205 1206 bool 1207 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1208 { 1209 // locker will keep a mutex locked until it goes out of scope 1210 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1211 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1212 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1213 1214 size_t num_thread_ids = m_thread_ids.size(); 1215 // The "m_thread_ids" thread ID list should always be updated after each stop 1216 // reply packet, but in case it isn't, update it here. 1217 if (num_thread_ids == 0) 1218 { 1219 if (!UpdateThreadIDList ()) 1220 return false; 1221 num_thread_ids = m_thread_ids.size(); 1222 } 1223 1224 if (num_thread_ids > 0) 1225 { 1226 for (size_t i=0; i<num_thread_ids; ++i) 1227 { 1228 tid_t tid = m_thread_ids[i]; 1229 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1230 if (!thread_sp) 1231 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1232 new_thread_list.AddThread(thread_sp); 1233 } 1234 } 1235 1236 return true; 1237 } 1238 1239 1240 StateType 1241 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1242 { 1243 stop_packet.SetFilePos (0); 1244 const char stop_type = stop_packet.GetChar(); 1245 switch (stop_type) 1246 { 1247 case 'T': 1248 case 'S': 1249 { 1250 if (GetStopID() == 0) 1251 { 1252 // Our first stop, make sure we have a process ID, and also make 1253 // sure we know about our registers 1254 if (GetID() == LLDB_INVALID_PROCESS_ID) 1255 { 1256 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1257 if (pid != LLDB_INVALID_PROCESS_ID) 1258 SetID (pid); 1259 } 1260 BuildDynamicRegisterInfo (true); 1261 } 1262 // Stop with signal and thread info 1263 const uint8_t signo = stop_packet.GetHexU8(); 1264 std::string name; 1265 std::string value; 1266 std::string thread_name; 1267 std::string reason; 1268 std::string description; 1269 uint32_t exc_type = 0; 1270 std::vector<addr_t> exc_data; 1271 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1272 ThreadSP thread_sp; 1273 1274 while (stop_packet.GetNameColonValue(name, value)) 1275 { 1276 if (name.compare("metype") == 0) 1277 { 1278 // exception type in big endian hex 1279 exc_type = 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 handled = true; 1419 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1420 { 1421 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1422 } 1423 else 1424 { 1425 StopInfoSP invalid_stop_info_sp; 1426 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1427 } 1428 } 1429 1430 } 1431 else if (reason.compare("trap") == 0) 1432 { 1433 // Let the trap just use the standard signal stop reason below... 1434 } 1435 else if (reason.compare("watchpoint") == 0) 1436 { 1437 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1438 // TODO: locate the watchpoint somehow... 1439 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1440 handled = true; 1441 } 1442 else if (reason.compare("exception") == 0) 1443 { 1444 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1445 handled = true; 1446 } 1447 } 1448 1449 if (signo) 1450 { 1451 if (signo == SIGTRAP) 1452 { 1453 // Currently we are going to assume SIGTRAP means we are either 1454 // hitting a breakpoint or hardware single stepping. 1455 handled = true; 1456 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1457 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1458 1459 if (bp_site_sp) 1460 { 1461 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1462 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1463 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1464 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1465 { 1466 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1467 } 1468 else 1469 { 1470 StopInfoSP invalid_stop_info_sp; 1471 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1472 } 1473 } 1474 else 1475 { 1476 // TODO: check for breakpoint or trap opcode in case there is a hard 1477 // coded software trap 1478 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1479 } 1480 } 1481 if (!handled) 1482 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1483 } 1484 else 1485 { 1486 StopInfoSP invalid_stop_info_sp; 1487 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1488 } 1489 1490 if (!description.empty()) 1491 { 1492 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1493 if (stop_info_sp) 1494 { 1495 stop_info_sp->SetDescription (description.c_str()); 1496 } 1497 else 1498 { 1499 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1500 } 1501 } 1502 } 1503 } 1504 return eStateStopped; 1505 } 1506 break; 1507 1508 case 'W': 1509 // process exited 1510 return eStateExited; 1511 1512 default: 1513 break; 1514 } 1515 return eStateInvalid; 1516 } 1517 1518 void 1519 ProcessGDBRemote::RefreshStateAfterStop () 1520 { 1521 Mutex::Locker locker(m_thread_list.GetMutex()); 1522 m_thread_ids.clear(); 1523 // Set the thread stop info. It might have a "threads" key whose value is 1524 // a list of all thread IDs in the current process, so m_thread_ids might 1525 // get set. 1526 SetThreadStopInfo (m_last_stop_packet); 1527 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1528 if (m_thread_ids.empty()) 1529 { 1530 // No, we need to fetch the thread list manually 1531 UpdateThreadIDList(); 1532 } 1533 1534 // Let all threads recover from stopping and do any clean up based 1535 // on the previous thread state (if any). 1536 m_thread_list.RefreshStateAfterStop(); 1537 1538 } 1539 1540 Error 1541 ProcessGDBRemote::DoHalt (bool &caused_stop) 1542 { 1543 Error error; 1544 1545 bool timed_out = false; 1546 Mutex::Locker locker; 1547 1548 if (m_public_state.GetValue() == eStateAttaching) 1549 { 1550 // We are being asked to halt during an attach. We need to just close 1551 // our file handle and debugserver will go away, and we can be done... 1552 m_gdb_comm.Disconnect(); 1553 } 1554 else 1555 { 1556 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1557 { 1558 if (timed_out) 1559 error.SetErrorString("timed out sending interrupt packet"); 1560 else 1561 error.SetErrorString("unknown error sending interrupt packet"); 1562 } 1563 1564 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1565 } 1566 return error; 1567 } 1568 1569 Error 1570 ProcessGDBRemote::InterruptIfRunning 1571 ( 1572 bool discard_thread_plans, 1573 bool catch_stop_event, 1574 EventSP &stop_event_sp 1575 ) 1576 { 1577 Error error; 1578 1579 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1580 1581 bool paused_private_state_thread = false; 1582 const bool is_running = m_gdb_comm.IsRunning(); 1583 if (log) 1584 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1585 discard_thread_plans, 1586 catch_stop_event, 1587 is_running); 1588 1589 if (discard_thread_plans) 1590 { 1591 if (log) 1592 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1593 m_thread_list.DiscardThreadPlans(); 1594 } 1595 if (is_running) 1596 { 1597 if (catch_stop_event) 1598 { 1599 if (log) 1600 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1601 PausePrivateStateThread(); 1602 paused_private_state_thread = true; 1603 } 1604 1605 bool timed_out = false; 1606 Mutex::Locker locker; 1607 1608 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1609 { 1610 if (timed_out) 1611 error.SetErrorString("timed out sending interrupt packet"); 1612 else 1613 error.SetErrorString("unknown error sending interrupt packet"); 1614 if (paused_private_state_thread) 1615 ResumePrivateStateThread(); 1616 return error; 1617 } 1618 1619 if (catch_stop_event) 1620 { 1621 // LISTEN HERE 1622 TimeValue timeout_time; 1623 timeout_time = TimeValue::Now(); 1624 timeout_time.OffsetWithSeconds(5); 1625 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1626 1627 timed_out = state == eStateInvalid; 1628 if (log) 1629 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1630 1631 if (timed_out) 1632 error.SetErrorString("unable to verify target stopped"); 1633 } 1634 1635 if (paused_private_state_thread) 1636 { 1637 if (log) 1638 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1639 ResumePrivateStateThread(); 1640 } 1641 } 1642 return error; 1643 } 1644 1645 Error 1646 ProcessGDBRemote::WillDetach () 1647 { 1648 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1649 if (log) 1650 log->Printf ("ProcessGDBRemote::WillDetach()"); 1651 1652 bool discard_thread_plans = true; 1653 bool catch_stop_event = true; 1654 EventSP event_sp; 1655 1656 // FIXME: InterruptIfRunning should be done in the Process base class, or better still make Halt do what is 1657 // needed. This shouldn't be a feature of a particular plugin. 1658 1659 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1660 } 1661 1662 Error 1663 ProcessGDBRemote::DoDetach() 1664 { 1665 Error error; 1666 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1667 if (log) 1668 log->Printf ("ProcessGDBRemote::DoDetach()"); 1669 1670 DisableAllBreakpointSites (); 1671 1672 m_thread_list.DiscardThreadPlans(); 1673 1674 bool success = m_gdb_comm.Detach (); 1675 if (log) 1676 { 1677 if (success) 1678 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1679 else 1680 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1681 } 1682 // Sleep for one second to let the process get all detached... 1683 StopAsyncThread (); 1684 1685 SetPrivateState (eStateDetached); 1686 ResumePrivateStateThread(); 1687 1688 //KillDebugserverProcess (); 1689 return error; 1690 } 1691 1692 1693 Error 1694 ProcessGDBRemote::DoDestroy () 1695 { 1696 Error error; 1697 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1698 if (log) 1699 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1700 1701 // There is a bug in older iOS debugservers where they don't shut down the process 1702 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1703 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1704 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1705 // destroy it again. 1706 // 1707 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1708 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1709 // the debugservers with this bug are equal. There really should be a better way to test this! 1710 // 1711 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1712 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1713 // just do the straight-forward kill. 1714 // 1715 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1716 // necessary (or helpful) to do any of this. 1717 1718 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1719 { 1720 PlatformSP platform_sp = GetTarget().GetPlatform(); 1721 1722 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1723 if (platform_sp 1724 && platform_sp->GetName() 1725 && strcmp (platform_sp->GetName(), PlatformRemoteiOS::GetShortPluginNameStatic()) == 0) 1726 { 1727 if (m_destroy_tried_resuming) 1728 { 1729 if (log) 1730 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1731 } 1732 else 1733 { 1734 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1735 // but we really need it to happen here and it doesn't matter if we do it twice. 1736 m_thread_list.DiscardThreadPlans(); 1737 DisableAllBreakpointSites(); 1738 1739 bool stop_looks_like_crash = false; 1740 ThreadList &threads = GetThreadList(); 1741 1742 { 1743 Mutex::Locker(threads.GetMutex()); 1744 1745 size_t num_threads = threads.GetSize(); 1746 for (size_t i = 0; i < num_threads; i++) 1747 { 1748 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1749 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1750 StopReason reason = eStopReasonInvalid; 1751 if (stop_info_sp) 1752 reason = stop_info_sp->GetStopReason(); 1753 if (reason == eStopReasonBreakpoint 1754 || reason == eStopReasonException) 1755 { 1756 if (log) 1757 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: %lld stopped with reason: %s.", 1758 thread_sp->GetID(), 1759 stop_info_sp->GetDescription()); 1760 stop_looks_like_crash = true; 1761 break; 1762 } 1763 } 1764 } 1765 1766 if (stop_looks_like_crash) 1767 { 1768 if (log) 1769 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1770 m_destroy_tried_resuming = true; 1771 1772 // If we are going to run again before killing, it would be good to suspend all the threads 1773 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1774 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1775 // have to run the risk of letting those threads proceed a bit. 1776 1777 { 1778 Mutex::Locker(threads.GetMutex()); 1779 1780 size_t num_threads = threads.GetSize(); 1781 for (size_t i = 0; i < num_threads; i++) 1782 { 1783 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1784 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1785 StopReason reason = eStopReasonInvalid; 1786 if (stop_info_sp) 1787 reason = stop_info_sp->GetStopReason(); 1788 if (reason != eStopReasonBreakpoint 1789 && reason != eStopReasonException) 1790 { 1791 if (log) 1792 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: %lld before running.", 1793 thread_sp->GetID()); 1794 thread_sp->SetResumeState(eStateSuspended); 1795 } 1796 } 1797 } 1798 Resume (); 1799 return Destroy(); 1800 } 1801 } 1802 } 1803 } 1804 1805 // Interrupt if our inferior is running... 1806 int exit_status = SIGABRT; 1807 std::string exit_string; 1808 1809 if (m_gdb_comm.IsConnected()) 1810 { 1811 if (m_public_state.GetValue() != eStateAttaching) 1812 { 1813 1814 StringExtractorGDBRemote response; 1815 bool send_async = true; 1816 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1817 { 1818 char packet_cmd = response.GetChar(0); 1819 1820 if (packet_cmd == 'W' || packet_cmd == 'X') 1821 { 1822 SetLastStopPacket (response); 1823 ClearThreadIDList (); 1824 exit_status = response.GetHexU8(); 1825 } 1826 else 1827 { 1828 if (log) 1829 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 1830 exit_string.assign("got unexpected response to k packet: "); 1831 exit_string.append(response.GetStringRef()); 1832 } 1833 } 1834 else 1835 { 1836 if (log) 1837 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1838 exit_string.assign("failed to send the k packet"); 1839 } 1840 } 1841 else 1842 { 1843 if (log) 1844 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1845 exit_string.assign ("killing while attaching."); 1846 } 1847 } 1848 else 1849 { 1850 // If we missed setting the exit status on the way out, do it here. 1851 // NB set exit status can be called multiple times, the first one sets the status. 1852 exit_string.assign("destroying when not connected to debugserver"); 1853 } 1854 1855 SetExitStatus(exit_status, exit_string.c_str()); 1856 1857 StopAsyncThread (); 1858 KillDebugserverProcess (); 1859 return error; 1860 } 1861 1862 //------------------------------------------------------------------ 1863 // Process Queries 1864 //------------------------------------------------------------------ 1865 1866 bool 1867 ProcessGDBRemote::IsAlive () 1868 { 1869 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1870 } 1871 1872 addr_t 1873 ProcessGDBRemote::GetImageInfoAddress() 1874 { 1875 return m_gdb_comm.GetShlibInfoAddr(); 1876 } 1877 1878 //------------------------------------------------------------------ 1879 // Process Memory 1880 //------------------------------------------------------------------ 1881 size_t 1882 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1883 { 1884 if (size > m_max_memory_size) 1885 { 1886 // Keep memory read sizes down to a sane limit. This function will be 1887 // called multiple times in order to complete the task by 1888 // lldb_private::Process so it is ok to do this. 1889 size = m_max_memory_size; 1890 } 1891 1892 char packet[64]; 1893 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%zx", (uint64_t)addr, size); 1894 assert (packet_len + 1 < sizeof(packet)); 1895 StringExtractorGDBRemote response; 1896 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1897 { 1898 if (response.IsNormalResponse()) 1899 { 1900 error.Clear(); 1901 return response.GetHexBytes(buf, size, '\xdd'); 1902 } 1903 else if (response.IsErrorResponse()) 1904 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1905 else if (response.IsUnsupportedResponse()) 1906 error.SetErrorStringWithFormat("'%s' packet unsupported", packet); 1907 else 1908 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet, response.GetStringRef().c_str()); 1909 } 1910 else 1911 { 1912 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1913 } 1914 return 0; 1915 } 1916 1917 size_t 1918 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1919 { 1920 if (size > m_max_memory_size) 1921 { 1922 // Keep memory read sizes down to a sane limit. This function will be 1923 // called multiple times in order to complete the task by 1924 // lldb_private::Process so it is ok to do this. 1925 size = m_max_memory_size; 1926 } 1927 1928 StreamString packet; 1929 packet.Printf("M%llx,%zx:", addr, size); 1930 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1931 StringExtractorGDBRemote response; 1932 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1933 { 1934 if (response.IsOKResponse()) 1935 { 1936 error.Clear(); 1937 return size; 1938 } 1939 else if (response.IsErrorResponse()) 1940 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1941 else if (response.IsUnsupportedResponse()) 1942 error.SetErrorStringWithFormat("'%s' packet unsupported", packet.GetString().c_str()); 1943 else 1944 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1945 } 1946 else 1947 { 1948 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1949 } 1950 return 0; 1951 } 1952 1953 lldb::addr_t 1954 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1955 { 1956 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1957 1958 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1959 switch (supported) 1960 { 1961 case eLazyBoolCalculate: 1962 case eLazyBoolYes: 1963 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1964 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1965 return allocated_addr; 1966 1967 case eLazyBoolNo: 1968 // Call mmap() to create memory in the inferior.. 1969 unsigned prot = 0; 1970 if (permissions & lldb::ePermissionsReadable) 1971 prot |= eMmapProtRead; 1972 if (permissions & lldb::ePermissionsWritable) 1973 prot |= eMmapProtWrite; 1974 if (permissions & lldb::ePermissionsExecutable) 1975 prot |= eMmapProtExec; 1976 1977 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 1978 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 1979 m_addr_to_mmap_size[allocated_addr] = size; 1980 else 1981 allocated_addr = LLDB_INVALID_ADDRESS; 1982 break; 1983 } 1984 1985 if (allocated_addr == LLDB_INVALID_ADDRESS) 1986 error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); 1987 else 1988 error.Clear(); 1989 return allocated_addr; 1990 } 1991 1992 Error 1993 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 1994 MemoryRegionInfo ®ion_info) 1995 { 1996 1997 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 1998 return error; 1999 } 2000 2001 Error 2002 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2003 { 2004 2005 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2006 return error; 2007 } 2008 2009 Error 2010 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2011 { 2012 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2013 return error; 2014 } 2015 2016 Error 2017 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2018 { 2019 Error error; 2020 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2021 2022 switch (supported) 2023 { 2024 case eLazyBoolCalculate: 2025 // We should never be deallocating memory without allocating memory 2026 // first so we should never get eLazyBoolCalculate 2027 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2028 break; 2029 2030 case eLazyBoolYes: 2031 if (!m_gdb_comm.DeallocateMemory (addr)) 2032 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 2033 break; 2034 2035 case eLazyBoolNo: 2036 // Call munmap() to deallocate memory in the inferior.. 2037 { 2038 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2039 if (pos != m_addr_to_mmap_size.end() && 2040 InferiorCallMunmap(this, addr, pos->second)) 2041 m_addr_to_mmap_size.erase (pos); 2042 else 2043 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 2044 } 2045 break; 2046 } 2047 2048 return error; 2049 } 2050 2051 2052 //------------------------------------------------------------------ 2053 // Process STDIO 2054 //------------------------------------------------------------------ 2055 size_t 2056 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2057 { 2058 if (m_stdio_communication.IsConnected()) 2059 { 2060 ConnectionStatus status; 2061 m_stdio_communication.Write(src, src_len, status, NULL); 2062 } 2063 return 0; 2064 } 2065 2066 Error 2067 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 2068 { 2069 Error error; 2070 assert (bp_site != NULL); 2071 2072 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2073 user_id_t site_id = bp_site->GetID(); 2074 const addr_t addr = bp_site->GetLoadAddress(); 2075 if (log) 2076 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 2077 2078 if (bp_site->IsEnabled()) 2079 { 2080 if (log) 2081 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2082 return error; 2083 } 2084 else 2085 { 2086 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2087 2088 if (bp_site->HardwarePreferred()) 2089 { 2090 // Try and set hardware breakpoint, and if that fails, fall through 2091 // and set a software breakpoint? 2092 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2093 { 2094 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2095 { 2096 bp_site->SetEnabled(true); 2097 bp_site->SetType (BreakpointSite::eHardware); 2098 return error; 2099 } 2100 } 2101 } 2102 2103 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2104 { 2105 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2106 { 2107 bp_site->SetEnabled(true); 2108 bp_site->SetType (BreakpointSite::eExternal); 2109 return error; 2110 } 2111 } 2112 2113 return EnableSoftwareBreakpoint (bp_site); 2114 } 2115 2116 if (log) 2117 { 2118 const char *err_string = error.AsCString(); 2119 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 2120 bp_site->GetLoadAddress(), 2121 err_string ? err_string : "NULL"); 2122 } 2123 // We shouldn't reach here on a successful breakpoint enable... 2124 if (error.Success()) 2125 error.SetErrorToGenericError(); 2126 return error; 2127 } 2128 2129 Error 2130 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 2131 { 2132 Error error; 2133 assert (bp_site != NULL); 2134 addr_t addr = bp_site->GetLoadAddress(); 2135 user_id_t site_id = bp_site->GetID(); 2136 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2137 if (log) 2138 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 2139 2140 if (bp_site->IsEnabled()) 2141 { 2142 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2143 2144 BreakpointSite::Type bp_type = bp_site->GetType(); 2145 switch (bp_type) 2146 { 2147 case BreakpointSite::eSoftware: 2148 error = DisableSoftwareBreakpoint (bp_site); 2149 break; 2150 2151 case BreakpointSite::eHardware: 2152 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2153 error.SetErrorToGenericError(); 2154 break; 2155 2156 case BreakpointSite::eExternal: 2157 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2158 error.SetErrorToGenericError(); 2159 break; 2160 } 2161 if (error.Success()) 2162 bp_site->SetEnabled(false); 2163 } 2164 else 2165 { 2166 if (log) 2167 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2168 return error; 2169 } 2170 2171 if (error.Success()) 2172 error.SetErrorToGenericError(); 2173 return error; 2174 } 2175 2176 // Pre-requisite: wp != NULL. 2177 static GDBStoppointType 2178 GetGDBStoppointType (Watchpoint *wp) 2179 { 2180 assert(wp); 2181 bool watch_read = wp->WatchpointRead(); 2182 bool watch_write = wp->WatchpointWrite(); 2183 2184 // watch_read and watch_write cannot both be false. 2185 assert(watch_read || watch_write); 2186 if (watch_read && watch_write) 2187 return eWatchpointReadWrite; 2188 else if (watch_read) 2189 return eWatchpointRead; 2190 else // Must be watch_write, then. 2191 return eWatchpointWrite; 2192 } 2193 2194 Error 2195 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 2196 { 2197 Error error; 2198 if (wp) 2199 { 2200 user_id_t watchID = wp->GetID(); 2201 addr_t addr = wp->GetLoadAddress(); 2202 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2203 if (log) 2204 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 2205 if (wp->IsEnabled()) 2206 { 2207 if (log) 2208 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 2209 return error; 2210 } 2211 2212 GDBStoppointType type = GetGDBStoppointType(wp); 2213 // Pass down an appropriate z/Z packet... 2214 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2215 { 2216 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2217 { 2218 wp->SetEnabled(true); 2219 return error; 2220 } 2221 else 2222 error.SetErrorString("sending gdb watchpoint packet failed"); 2223 } 2224 else 2225 error.SetErrorString("watchpoints not supported"); 2226 } 2227 else 2228 { 2229 error.SetErrorString("Watchpoint argument was NULL."); 2230 } 2231 if (error.Success()) 2232 error.SetErrorToGenericError(); 2233 return error; 2234 } 2235 2236 Error 2237 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 2238 { 2239 Error error; 2240 if (wp) 2241 { 2242 user_id_t watchID = wp->GetID(); 2243 2244 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2245 2246 addr_t addr = wp->GetLoadAddress(); 2247 if (log) 2248 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 2249 2250 if (!wp->IsEnabled()) 2251 { 2252 if (log) 2253 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2254 return error; 2255 } 2256 2257 if (wp->IsHardware()) 2258 { 2259 GDBStoppointType type = GetGDBStoppointType(wp); 2260 // Pass down an appropriate z/Z packet... 2261 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2262 { 2263 wp->SetEnabled(false); 2264 return error; 2265 } 2266 else 2267 error.SetErrorString("sending gdb watchpoint packet failed"); 2268 } 2269 // TODO: clear software watchpoints if we implement them 2270 } 2271 else 2272 { 2273 error.SetErrorString("Watchpoint argument was NULL."); 2274 } 2275 if (error.Success()) 2276 error.SetErrorToGenericError(); 2277 return error; 2278 } 2279 2280 void 2281 ProcessGDBRemote::Clear() 2282 { 2283 m_flags = 0; 2284 m_thread_list.Clear(); 2285 } 2286 2287 Error 2288 ProcessGDBRemote::DoSignal (int signo) 2289 { 2290 Error error; 2291 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2292 if (log) 2293 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2294 2295 if (!m_gdb_comm.SendAsyncSignal (signo)) 2296 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2297 return error; 2298 } 2299 2300 Error 2301 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2302 { 2303 ProcessLaunchInfo launch_info; 2304 return StartDebugserverProcess(debugserver_url, launch_info); 2305 } 2306 2307 Error 2308 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2309 { 2310 Error error; 2311 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2312 { 2313 // If we locate debugserver, keep that located version around 2314 static FileSpec g_debugserver_file_spec; 2315 2316 ProcessLaunchInfo debugserver_launch_info; 2317 char debugserver_path[PATH_MAX]; 2318 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2319 2320 // Always check to see if we have an environment override for the path 2321 // to the debugserver to use and use it if we do. 2322 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2323 if (env_debugserver_path) 2324 debugserver_file_spec.SetFile (env_debugserver_path, false); 2325 else 2326 debugserver_file_spec = g_debugserver_file_spec; 2327 bool debugserver_exists = debugserver_file_spec.Exists(); 2328 if (!debugserver_exists) 2329 { 2330 // The debugserver binary is in the LLDB.framework/Resources 2331 // directory. 2332 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2333 { 2334 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2335 debugserver_exists = debugserver_file_spec.Exists(); 2336 if (debugserver_exists) 2337 { 2338 g_debugserver_file_spec = debugserver_file_spec; 2339 } 2340 else 2341 { 2342 g_debugserver_file_spec.Clear(); 2343 debugserver_file_spec.Clear(); 2344 } 2345 } 2346 } 2347 2348 if (debugserver_exists) 2349 { 2350 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2351 2352 m_stdio_communication.Clear(); 2353 2354 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2355 2356 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2357 char arg_cstr[PATH_MAX]; 2358 2359 // Start args with "debugserver /file/path -r --" 2360 debugserver_args.AppendArgument(debugserver_path); 2361 debugserver_args.AppendArgument(debugserver_url); 2362 // use native registers, not the GDB registers 2363 debugserver_args.AppendArgument("--native-regs"); 2364 // make debugserver run in its own session so signals generated by 2365 // special terminal key sequences (^C) don't affect debugserver 2366 debugserver_args.AppendArgument("--setsid"); 2367 2368 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2369 if (env_debugserver_log_file) 2370 { 2371 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2372 debugserver_args.AppendArgument(arg_cstr); 2373 } 2374 2375 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2376 if (env_debugserver_log_flags) 2377 { 2378 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2379 debugserver_args.AppendArgument(arg_cstr); 2380 } 2381 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2382 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2383 2384 // We currently send down all arguments, attach pids, or attach 2385 // process names in dedicated GDB server packets, so we don't need 2386 // to pass them as arguments. This is currently because of all the 2387 // things we need to setup prior to launching: the environment, 2388 // current working dir, file actions, etc. 2389 #if 0 2390 // Now append the program arguments 2391 if (inferior_argv) 2392 { 2393 // Terminate the debugserver args so we can now append the inferior args 2394 debugserver_args.AppendArgument("--"); 2395 2396 for (int i = 0; inferior_argv[i] != NULL; ++i) 2397 debugserver_args.AppendArgument (inferior_argv[i]); 2398 } 2399 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2400 { 2401 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2402 debugserver_args.AppendArgument (arg_cstr); 2403 } 2404 else if (attach_name && attach_name[0]) 2405 { 2406 if (wait_for_launch) 2407 debugserver_args.AppendArgument ("--waitfor"); 2408 else 2409 debugserver_args.AppendArgument ("--attach"); 2410 debugserver_args.AppendArgument (attach_name); 2411 } 2412 #endif 2413 2414 ProcessLaunchInfo::FileAction file_action; 2415 2416 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2417 // to "/dev/null" if we run into any problems. 2418 file_action.Close (STDIN_FILENO); 2419 debugserver_launch_info.AppendFileAction (file_action); 2420 file_action.Close (STDOUT_FILENO); 2421 debugserver_launch_info.AppendFileAction (file_action); 2422 file_action.Close (STDERR_FILENO); 2423 debugserver_launch_info.AppendFileAction (file_action); 2424 2425 if (log) 2426 { 2427 StreamString strm; 2428 debugserver_args.Dump (&strm); 2429 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2430 } 2431 2432 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2433 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2434 2435 error = Host::LaunchProcess(debugserver_launch_info); 2436 2437 if (error.Success ()) 2438 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2439 else 2440 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2441 2442 if (error.Fail() || log) 2443 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%llu, path='%s'", m_debugserver_pid, debugserver_path); 2444 } 2445 else 2446 { 2447 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2448 } 2449 2450 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2451 StartAsyncThread (); 2452 } 2453 return error; 2454 } 2455 2456 bool 2457 ProcessGDBRemote::MonitorDebugserverProcess 2458 ( 2459 void *callback_baton, 2460 lldb::pid_t debugserver_pid, 2461 bool exited, // True if the process did exit 2462 int signo, // Zero for no signal 2463 int exit_status // Exit value of process if signal is zero 2464 ) 2465 { 2466 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2467 // and might not exist anymore, so we need to carefully try to get the 2468 // target for this process first since we have a race condition when 2469 // we are done running between getting the notice that the inferior 2470 // process has died and the debugserver that was debugging this process. 2471 // In our test suite, we are also continually running process after 2472 // process, so we must be very careful to make sure: 2473 // 1 - process object hasn't been deleted already 2474 // 2 - that a new process object hasn't been recreated in its place 2475 2476 // "debugserver_pid" argument passed in is the process ID for 2477 // debugserver that we are tracking... 2478 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2479 2480 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2481 2482 // Get a shared pointer to the target that has a matching process pointer. 2483 // This target could be gone, or the target could already have a new process 2484 // object inside of it 2485 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2486 2487 if (log) 2488 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%llu, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2489 2490 if (target_sp) 2491 { 2492 // We found a process in a target that matches, but another thread 2493 // might be in the process of launching a new process that will 2494 // soon replace it, so get a shared pointer to the process so we 2495 // can keep it alive. 2496 ProcessSP process_sp (target_sp->GetProcessSP()); 2497 // Now we have a shared pointer to the process that can't go away on us 2498 // so we now make sure it was the same as the one passed in, and also make 2499 // sure that our previous "process *" didn't get deleted and have a new 2500 // "process *" created in its place with the same pointer. To verify this 2501 // we make sure the process has our debugserver process ID. If we pass all 2502 // of these tests, then we are sure that this process is the one we were 2503 // looking for. 2504 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2505 { 2506 // Sleep for a half a second to make sure our inferior process has 2507 // time to set its exit status before we set it incorrectly when 2508 // both the debugserver and the inferior process shut down. 2509 usleep (500000); 2510 // If our process hasn't yet exited, debugserver might have died. 2511 // If the process did exit, the we are reaping it. 2512 const StateType state = process->GetState(); 2513 2514 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2515 state != eStateInvalid && 2516 state != eStateUnloaded && 2517 state != eStateExited && 2518 state != eStateDetached) 2519 { 2520 char error_str[1024]; 2521 if (signo) 2522 { 2523 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2524 if (signal_cstr) 2525 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2526 else 2527 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2528 } 2529 else 2530 { 2531 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2532 } 2533 2534 process->SetExitStatus (-1, error_str); 2535 } 2536 // Debugserver has exited we need to let our ProcessGDBRemote 2537 // know that it no longer has a debugserver instance 2538 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2539 } 2540 } 2541 return true; 2542 } 2543 2544 void 2545 ProcessGDBRemote::KillDebugserverProcess () 2546 { 2547 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2548 { 2549 ::kill (m_debugserver_pid, SIGINT); 2550 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2551 } 2552 } 2553 2554 void 2555 ProcessGDBRemote::Initialize() 2556 { 2557 static bool g_initialized = false; 2558 2559 if (g_initialized == false) 2560 { 2561 g_initialized = true; 2562 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2563 GetPluginDescriptionStatic(), 2564 CreateInstance); 2565 2566 Log::Callbacks log_callbacks = { 2567 ProcessGDBRemoteLog::DisableLog, 2568 ProcessGDBRemoteLog::EnableLog, 2569 ProcessGDBRemoteLog::ListLogCategories 2570 }; 2571 2572 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2573 } 2574 } 2575 2576 bool 2577 ProcessGDBRemote::StartAsyncThread () 2578 { 2579 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2580 2581 if (log) 2582 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2583 2584 // Create a thread that watches our internal state and controls which 2585 // events make it to clients (into the DCProcess event queue). 2586 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2587 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2588 } 2589 2590 void 2591 ProcessGDBRemote::StopAsyncThread () 2592 { 2593 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2594 2595 if (log) 2596 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2597 2598 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2599 2600 // This will shut down the async thread. 2601 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2602 2603 // Stop the stdio thread 2604 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2605 { 2606 Host::ThreadJoin (m_async_thread, NULL, NULL); 2607 } 2608 } 2609 2610 2611 void * 2612 ProcessGDBRemote::AsyncThread (void *arg) 2613 { 2614 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2615 2616 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2617 if (log) 2618 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2619 2620 Listener listener ("ProcessGDBRemote::AsyncThread"); 2621 EventSP event_sp; 2622 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2623 eBroadcastBitAsyncThreadShouldExit; 2624 2625 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2626 { 2627 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2628 2629 bool done = false; 2630 while (!done) 2631 { 2632 if (log) 2633 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2634 if (listener.WaitForEvent (NULL, event_sp)) 2635 { 2636 const uint32_t event_type = event_sp->GetType(); 2637 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2638 { 2639 if (log) 2640 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2641 2642 switch (event_type) 2643 { 2644 case eBroadcastBitAsyncContinue: 2645 { 2646 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2647 2648 if (continue_packet) 2649 { 2650 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2651 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2652 if (log) 2653 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2654 2655 if (::strstr (continue_cstr, "vAttach") == NULL) 2656 process->SetPrivateState(eStateRunning); 2657 StringExtractorGDBRemote response; 2658 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2659 2660 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2661 // The thread ID list might be contained within the "response", or the stop reply packet that 2662 // caused the stop. So clear it now before we give the stop reply packet to the process 2663 // using the process->SetLastStopPacket()... 2664 process->ClearThreadIDList (); 2665 2666 switch (stop_state) 2667 { 2668 case eStateStopped: 2669 case eStateCrashed: 2670 case eStateSuspended: 2671 process->SetLastStopPacket (response); 2672 process->SetPrivateState (stop_state); 2673 break; 2674 2675 case eStateExited: 2676 process->SetLastStopPacket (response); 2677 process->ClearThreadIDList(); 2678 response.SetFilePos(1); 2679 process->SetExitStatus(response.GetHexU8(), NULL); 2680 done = true; 2681 break; 2682 2683 case eStateInvalid: 2684 process->SetExitStatus(-1, "lost connection"); 2685 break; 2686 2687 default: 2688 process->SetPrivateState (stop_state); 2689 break; 2690 } 2691 } 2692 } 2693 break; 2694 2695 case eBroadcastBitAsyncThreadShouldExit: 2696 if (log) 2697 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2698 done = true; 2699 break; 2700 2701 default: 2702 if (log) 2703 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2704 done = true; 2705 break; 2706 } 2707 } 2708 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2709 { 2710 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2711 { 2712 process->SetExitStatus (-1, "lost connection"); 2713 done = true; 2714 } 2715 } 2716 } 2717 else 2718 { 2719 if (log) 2720 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2721 done = true; 2722 } 2723 } 2724 } 2725 2726 if (log) 2727 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2728 2729 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2730 return NULL; 2731 } 2732 2733 const char * 2734 ProcessGDBRemote::GetDispatchQueueNameForThread 2735 ( 2736 addr_t thread_dispatch_qaddr, 2737 std::string &dispatch_queue_name 2738 ) 2739 { 2740 dispatch_queue_name.clear(); 2741 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2742 { 2743 // Cache the dispatch_queue_offsets_addr value so we don't always have 2744 // to look it up 2745 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2746 { 2747 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2748 const Symbol *dispatch_queue_offsets_symbol = NULL; 2749 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2750 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2751 if (module_sp) 2752 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2753 2754 if (dispatch_queue_offsets_symbol == NULL) 2755 { 2756 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2757 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2758 if (module_sp) 2759 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2760 } 2761 if (dispatch_queue_offsets_symbol) 2762 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2763 2764 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2765 return NULL; 2766 } 2767 2768 uint8_t memory_buffer[8]; 2769 DataExtractor data (memory_buffer, 2770 sizeof(memory_buffer), 2771 m_target.GetArchitecture().GetByteOrder(), 2772 m_target.GetArchitecture().GetAddressByteSize()); 2773 2774 // Excerpt from src/queue_private.h 2775 struct dispatch_queue_offsets_s 2776 { 2777 uint16_t dqo_version; 2778 uint16_t dqo_label; 2779 uint16_t dqo_label_size; 2780 } dispatch_queue_offsets; 2781 2782 2783 Error error; 2784 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2785 { 2786 uint32_t data_offset = 0; 2787 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2788 { 2789 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2790 { 2791 data_offset = 0; 2792 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2793 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2794 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2795 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2796 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2797 dispatch_queue_name.erase (bytes_read); 2798 } 2799 } 2800 } 2801 } 2802 if (dispatch_queue_name.empty()) 2803 return NULL; 2804 return dispatch_queue_name.c_str(); 2805 } 2806 2807 //uint32_t 2808 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2809 //{ 2810 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2811 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2812 // if (m_local_debugserver) 2813 // { 2814 // return Host::ListProcessesMatchingName (name, matches, pids); 2815 // } 2816 // else 2817 // { 2818 // // FIXME: Implement talking to the remote debugserver. 2819 // return 0; 2820 // } 2821 // 2822 //} 2823 // 2824 bool 2825 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2826 lldb_private::StoppointCallbackContext *context, 2827 lldb::user_id_t break_id, 2828 lldb::user_id_t break_loc_id) 2829 { 2830 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2831 // run so I can stop it if that's what I want to do. 2832 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2833 if (log) 2834 log->Printf("Hit New Thread Notification breakpoint."); 2835 return false; 2836 } 2837 2838 2839 bool 2840 ProcessGDBRemote::StartNoticingNewThreads() 2841 { 2842 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2843 if (m_thread_create_bp_sp) 2844 { 2845 if (log && log->GetVerbose()) 2846 log->Printf("Enabled noticing new thread breakpoint."); 2847 m_thread_create_bp_sp->SetEnabled(true); 2848 } 2849 else 2850 { 2851 PlatformSP platform_sp (m_target.GetPlatform()); 2852 if (platform_sp) 2853 { 2854 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2855 if (m_thread_create_bp_sp) 2856 { 2857 if (log && log->GetVerbose()) 2858 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2859 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2860 } 2861 else 2862 { 2863 if (log) 2864 log->Printf("Failed to create new thread notification breakpoint."); 2865 } 2866 } 2867 } 2868 return m_thread_create_bp_sp.get() != NULL; 2869 } 2870 2871 bool 2872 ProcessGDBRemote::StopNoticingNewThreads() 2873 { 2874 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2875 if (log && log->GetVerbose()) 2876 log->Printf ("Disabling new thread notification breakpoint."); 2877 2878 if (m_thread_create_bp_sp) 2879 m_thread_create_bp_sp->SetEnabled(false); 2880 2881 return true; 2882 } 2883 2884 2885