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 <netinet/in.h> 15 #include <sys/mman.h> // for mmap 16 #include <sys/stat.h> 17 #include <sys/types.h> 18 #include <time.h> 19 20 // C++ Includes 21 #include <algorithm> 22 #include <map> 23 24 // Other libraries and framework includes 25 26 #include "lldb/Breakpoint/Watchpoint.h" 27 #include "lldb/Interpreter/Args.h" 28 #include "lldb/Core/ArchSpec.h" 29 #include "lldb/Core/Debugger.h" 30 #include "lldb/Core/ConnectionFileDescriptor.h" 31 #include "lldb/Host/FileSpec.h" 32 #include "lldb/Core/InputReader.h" 33 #include "lldb/Core/Module.h" 34 #include "lldb/Core/PluginManager.h" 35 #include "lldb/Core/State.h" 36 #include "lldb/Core/StreamFile.h" 37 #include "lldb/Core/StreamString.h" 38 #include "lldb/Core/Timer.h" 39 #include "lldb/Core/Value.h" 40 #include "lldb/Host/TimeValue.h" 41 #include "lldb/Symbol/ObjectFile.h" 42 #include "lldb/Target/DynamicLoader.h" 43 #include "lldb/Target/Target.h" 44 #include "lldb/Target/TargetList.h" 45 #include "lldb/Target/ThreadPlanCallFunction.h" 46 #include "lldb/Utility/PseudoTerminal.h" 47 48 // Project includes 49 #include "lldb/Host/Host.h" 50 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 51 #include "Plugins/Process/Utility/StopInfoMachException.h" 52 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 53 #include "Utility/StringExtractorGDBRemote.h" 54 #include "GDBRemoteRegisterContext.h" 55 #include "ProcessGDBRemote.h" 56 #include "ProcessGDBRemoteLog.h" 57 #include "ThreadGDBRemote.h" 58 59 namespace lldb 60 { 61 // Provide a function that can easily dump the packet history if we know a 62 // ProcessGDBRemote * value (which we can get from logs or from debugging). 63 // We need the function in the lldb namespace so it makes it into the final 64 // executable since the LLDB shared library only exports stuff in the lldb 65 // namespace. This allows you to attach with a debugger and call this 66 // function and get the packet history dumped to a file. 67 void 68 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 69 { 70 lldb_private::StreamFile strm; 71 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 72 if (error.Success()) 73 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 74 } 75 } 76 77 78 #define DEBUGSERVER_BASENAME "debugserver" 79 using namespace lldb; 80 using namespace lldb_private; 81 82 static bool rand_initialized = false; 83 84 // TODO Randomly assigning a port is unsafe. We should get an unused 85 // ephemeral port from the kernel and make sure we reserve it before passing 86 // it to debugserver. 87 88 #if defined (__APPLE__) 89 #define LOW_PORT (IPPORT_RESERVED) 90 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 91 #else 92 #define LOW_PORT (1024u) 93 #define HIGH_PORT (49151u) 94 #endif 95 96 static inline uint16_t 97 get_random_port () 98 { 99 if (!rand_initialized) 100 { 101 time_t seed = time(NULL); 102 103 rand_initialized = true; 104 srand(seed); 105 } 106 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 107 } 108 109 110 const char * 111 ProcessGDBRemote::GetPluginNameStatic() 112 { 113 return "gdb-remote"; 114 } 115 116 const char * 117 ProcessGDBRemote::GetPluginDescriptionStatic() 118 { 119 return "GDB Remote protocol based debugging plug-in."; 120 } 121 122 void 123 ProcessGDBRemote::Terminate() 124 { 125 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 126 } 127 128 129 lldb::ProcessSP 130 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 131 { 132 lldb::ProcessSP process_sp; 133 if (crash_file_path == NULL) 134 process_sp.reset (new ProcessGDBRemote (target, listener)); 135 return process_sp; 136 } 137 138 bool 139 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 140 { 141 if (plugin_specified_by_name) 142 return true; 143 144 // For now we are just making sure the file exists for a given module 145 Module *exe_module = target.GetExecutableModulePointer(); 146 if (exe_module) 147 { 148 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 149 // We can't debug core files... 150 switch (exe_objfile->GetType()) 151 { 152 case ObjectFile::eTypeInvalid: 153 case ObjectFile::eTypeCoreFile: 154 case ObjectFile::eTypeDebugInfo: 155 case ObjectFile::eTypeObjectFile: 156 case ObjectFile::eTypeSharedLibrary: 157 case ObjectFile::eTypeStubLibrary: 158 return false; 159 case ObjectFile::eTypeExecutable: 160 case ObjectFile::eTypeDynamicLinker: 161 case ObjectFile::eTypeUnknown: 162 break; 163 } 164 return exe_module->GetFileSpec().Exists(); 165 } 166 // However, if there is no executable module, we return true since we might be preparing to attach. 167 return true; 168 } 169 170 //---------------------------------------------------------------------- 171 // ProcessGDBRemote constructor 172 //---------------------------------------------------------------------- 173 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 174 Process (target, listener), 175 m_flags (0), 176 m_gdb_comm(false), 177 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 178 m_last_stop_packet (), 179 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 180 m_register_info (), 181 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 182 m_async_thread (LLDB_INVALID_HOST_THREAD), 183 m_thread_ids (), 184 m_continue_c_tids (), 185 m_continue_C_tids (), 186 m_continue_s_tids (), 187 m_continue_S_tids (), 188 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 189 m_max_memory_size (512), 190 m_addr_to_mmap_size (), 191 m_thread_create_bp_sp (), 192 m_waiting_for_attach (false), 193 m_destroy_tried_resuming (false) 194 { 195 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 196 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 197 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 198 } 199 200 //---------------------------------------------------------------------- 201 // Destructor 202 //---------------------------------------------------------------------- 203 ProcessGDBRemote::~ProcessGDBRemote() 204 { 205 // m_mach_process.UnregisterNotificationCallbacks (this); 206 Clear(); 207 // We need to call finalize on the process before destroying ourselves 208 // to make sure all of the broadcaster cleanup goes as planned. If we 209 // destruct this class, then Process::~Process() might have problems 210 // trying to fully destroy the broadcaster. 211 Finalize(); 212 } 213 214 //---------------------------------------------------------------------- 215 // PluginInterface 216 //---------------------------------------------------------------------- 217 const char * 218 ProcessGDBRemote::GetPluginName() 219 { 220 return "Process debugging plug-in that uses the GDB remote protocol"; 221 } 222 223 const char * 224 ProcessGDBRemote::GetShortPluginName() 225 { 226 return GetPluginNameStatic(); 227 } 228 229 uint32_t 230 ProcessGDBRemote::GetPluginVersion() 231 { 232 return 1; 233 } 234 235 void 236 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 237 { 238 if (!force && m_register_info.GetNumRegisters() > 0) 239 return; 240 241 char packet[128]; 242 m_register_info.Clear(); 243 uint32_t reg_offset = 0; 244 uint32_t reg_num = 0; 245 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 246 response_type == StringExtractorGDBRemote::eResponse; 247 ++reg_num) 248 { 249 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 250 assert (packet_len < sizeof(packet)); 251 StringExtractorGDBRemote response; 252 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 253 { 254 response_type = response.GetResponseType(); 255 if (response_type == StringExtractorGDBRemote::eResponse) 256 { 257 std::string name; 258 std::string value; 259 ConstString reg_name; 260 ConstString alt_name; 261 ConstString set_name; 262 RegisterInfo reg_info = { NULL, // Name 263 NULL, // Alt name 264 0, // byte size 265 reg_offset, // offset 266 eEncodingUint, // encoding 267 eFormatHex, // formate 268 { 269 LLDB_INVALID_REGNUM, // GCC reg num 270 LLDB_INVALID_REGNUM, // DWARF reg num 271 LLDB_INVALID_REGNUM, // generic reg num 272 reg_num, // GDB reg num 273 reg_num // native register number 274 }, 275 NULL, 276 NULL 277 }; 278 279 while (response.GetNameColonValue(name, value)) 280 { 281 if (name.compare("name") == 0) 282 { 283 reg_name.SetCString(value.c_str()); 284 } 285 else if (name.compare("alt-name") == 0) 286 { 287 alt_name.SetCString(value.c_str()); 288 } 289 else if (name.compare("bitsize") == 0) 290 { 291 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 292 } 293 else if (name.compare("offset") == 0) 294 { 295 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 296 if (reg_offset != offset) 297 { 298 reg_offset = offset; 299 } 300 } 301 else if (name.compare("encoding") == 0) 302 { 303 if (value.compare("uint") == 0) 304 reg_info.encoding = eEncodingUint; 305 else if (value.compare("sint") == 0) 306 reg_info.encoding = eEncodingSint; 307 else if (value.compare("ieee754") == 0) 308 reg_info.encoding = eEncodingIEEE754; 309 else if (value.compare("vector") == 0) 310 reg_info.encoding = eEncodingVector; 311 } 312 else if (name.compare("format") == 0) 313 { 314 if (value.compare("binary") == 0) 315 reg_info.format = eFormatBinary; 316 else if (value.compare("decimal") == 0) 317 reg_info.format = eFormatDecimal; 318 else if (value.compare("hex") == 0) 319 reg_info.format = eFormatHex; 320 else if (value.compare("float") == 0) 321 reg_info.format = eFormatFloat; 322 else if (value.compare("vector-sint8") == 0) 323 reg_info.format = eFormatVectorOfSInt8; 324 else if (value.compare("vector-uint8") == 0) 325 reg_info.format = eFormatVectorOfUInt8; 326 else if (value.compare("vector-sint16") == 0) 327 reg_info.format = eFormatVectorOfSInt16; 328 else if (value.compare("vector-uint16") == 0) 329 reg_info.format = eFormatVectorOfUInt16; 330 else if (value.compare("vector-sint32") == 0) 331 reg_info.format = eFormatVectorOfSInt32; 332 else if (value.compare("vector-uint32") == 0) 333 reg_info.format = eFormatVectorOfUInt32; 334 else if (value.compare("vector-float32") == 0) 335 reg_info.format = eFormatVectorOfFloat32; 336 else if (value.compare("vector-uint128") == 0) 337 reg_info.format = eFormatVectorOfUInt128; 338 } 339 else if (name.compare("set") == 0) 340 { 341 set_name.SetCString(value.c_str()); 342 } 343 else if (name.compare("gcc") == 0) 344 { 345 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 346 } 347 else if (name.compare("dwarf") == 0) 348 { 349 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 350 } 351 else if (name.compare("generic") == 0) 352 { 353 if (value.compare("pc") == 0) 354 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; 355 else if (value.compare("sp") == 0) 356 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; 357 else if (value.compare("fp") == 0) 358 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; 359 else if (value.compare("ra") == 0) 360 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; 361 else if (value.compare("flags") == 0) 362 reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FLAGS; 363 else if (value.find("arg") == 0) 364 { 365 if (value.size() == 4) 366 { 367 switch (value[3]) 368 { 369 case '1': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG1; break; 370 case '2': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG2; break; 371 case '3': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG3; break; 372 case '4': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG4; break; 373 case '5': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG5; break; 374 case '6': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG6; break; 375 case '7': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG7; break; 376 case '8': reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_ARG8; break; 377 } 378 } 379 } 380 } 381 } 382 383 reg_info.byte_offset = reg_offset; 384 assert (reg_info.byte_size != 0); 385 reg_offset += reg_info.byte_size; 386 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 387 } 388 } 389 else 390 { 391 break; 392 } 393 } 394 395 // We didn't get anything if the accumulated reg_num is zero. See if we are 396 // debugging ARM and fill with a hard coded register set until we can get an 397 // updated debugserver down on the devices. 398 // On the other hand, if the accumulated reg_num is positive, see if we can 399 // add composite registers to the existing primordial ones. 400 bool from_scratch = (reg_num == 0); 401 402 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 403 const ArchSpec &remote_arch = m_gdb_comm.GetHostArchitecture(); 404 if (!target_arch.IsValid()) 405 { 406 if (remote_arch.IsValid() 407 && remote_arch.GetMachine() == llvm::Triple::arm 408 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 409 m_register_info.HardcodeARMRegisters(from_scratch); 410 } 411 else if (target_arch.GetMachine() == llvm::Triple::arm) 412 { 413 m_register_info.HardcodeARMRegisters(from_scratch); 414 } 415 416 // Add some convenience registers (eax, ebx, ecx, edx, esi, edi, ebp, esp) to x86_64. 417 if ((target_arch.IsValid() && target_arch.GetMachine() == llvm::Triple::x86_64) 418 || (remote_arch.IsValid() && remote_arch.GetMachine() == llvm::Triple::x86_64)) 419 m_register_info.Addx86_64ConvenienceRegisters(); 420 421 // At this point, we can finalize our register info. 422 m_register_info.Finalize (); 423 } 424 425 Error 426 ProcessGDBRemote::WillLaunch (Module* module) 427 { 428 return WillLaunchOrAttach (); 429 } 430 431 Error 432 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 433 { 434 return WillLaunchOrAttach (); 435 } 436 437 Error 438 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 439 { 440 return WillLaunchOrAttach (); 441 } 442 443 Error 444 ProcessGDBRemote::DoConnectRemote (const char *remote_url) 445 { 446 Error error (WillLaunchOrAttach ()); 447 448 if (error.Fail()) 449 return error; 450 451 error = ConnectToDebugserver (remote_url); 452 453 if (error.Fail()) 454 return error; 455 StartAsyncThread (); 456 457 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 458 if (pid == LLDB_INVALID_PROCESS_ID) 459 { 460 // We don't have a valid process ID, so note that we are connected 461 // and could now request to launch or attach, or get remote process 462 // listings... 463 SetPrivateState (eStateConnected); 464 } 465 else 466 { 467 // We have a valid process 468 SetID (pid); 469 GetThreadList(); 470 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 471 { 472 const StateType state = SetThreadStopInfo (m_last_stop_packet); 473 if (state == eStateStopped) 474 { 475 SetPrivateState (state); 476 } 477 else 478 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 479 } 480 else 481 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 482 } 483 484 if (error.Success() 485 && !GetTarget().GetArchitecture().IsValid() 486 && m_gdb_comm.GetHostArchitecture().IsValid()) 487 { 488 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 489 } 490 491 return error; 492 } 493 494 Error 495 ProcessGDBRemote::WillLaunchOrAttach () 496 { 497 Error error; 498 m_stdio_communication.Clear (); 499 return error; 500 } 501 502 //---------------------------------------------------------------------- 503 // Process Control 504 //---------------------------------------------------------------------- 505 Error 506 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 507 { 508 Error error; 509 510 uint32_t launch_flags = launch_info.GetFlags().Get(); 511 const char *stdin_path = NULL; 512 const char *stdout_path = NULL; 513 const char *stderr_path = NULL; 514 const char *working_dir = launch_info.GetWorkingDirectory(); 515 516 const ProcessLaunchInfo::FileAction *file_action; 517 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 518 if (file_action) 519 { 520 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 521 stdin_path = file_action->GetPath(); 522 } 523 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 524 if (file_action) 525 { 526 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 527 stdout_path = file_action->GetPath(); 528 } 529 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 530 if (file_action) 531 { 532 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 533 stderr_path = file_action->GetPath(); 534 } 535 536 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 537 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 538 // ::LogSetLogFile ("/dev/stdout"); 539 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 540 541 ObjectFile * object_file = exe_module->GetObjectFile(); 542 if (object_file) 543 { 544 char host_port[128]; 545 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 546 char connect_url[128]; 547 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 548 549 // Make sure we aren't already connected? 550 if (!m_gdb_comm.IsConnected()) 551 { 552 error = StartDebugserverProcess (host_port, launch_info); 553 if (error.Fail()) 554 { 555 if (log) 556 log->Printf("failed to start debugserver process: %s", error.AsCString()); 557 return error; 558 } 559 560 error = ConnectToDebugserver (connect_url); 561 } 562 563 if (error.Success()) 564 { 565 lldb_utility::PseudoTerminal pty; 566 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 567 568 // If the debugserver is local and we aren't disabling STDIO, lets use 569 // a pseudo terminal to instead of relying on the 'O' packets for stdio 570 // since 'O' packets can really slow down debugging if the inferior 571 // does a lot of output. 572 PlatformSP platform_sp (m_target.GetPlatform()); 573 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 574 { 575 const char *slave_name = NULL; 576 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 577 { 578 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 579 slave_name = pty.GetSlaveName (NULL, 0); 580 } 581 if (stdin_path == NULL) 582 stdin_path = slave_name; 583 584 if (stdout_path == NULL) 585 stdout_path = slave_name; 586 587 if (stderr_path == NULL) 588 stderr_path = slave_name; 589 } 590 591 // Set STDIN to /dev/null if we want STDIO disabled or if either 592 // STDOUT or STDERR have been set to something and STDIN hasn't 593 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 594 stdin_path = "/dev/null"; 595 596 // Set STDOUT to /dev/null if we want STDIO disabled or if either 597 // STDIN or STDERR have been set to something and STDOUT hasn't 598 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 599 stdout_path = "/dev/null"; 600 601 // Set STDERR to /dev/null if we want STDIO disabled or if either 602 // STDIN or STDOUT have been set to something and STDERR hasn't 603 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 604 stderr_path = "/dev/null"; 605 606 if (stdin_path) 607 m_gdb_comm.SetSTDIN (stdin_path); 608 if (stdout_path) 609 m_gdb_comm.SetSTDOUT (stdout_path); 610 if (stderr_path) 611 m_gdb_comm.SetSTDERR (stderr_path); 612 613 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 614 615 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 616 617 if (working_dir && working_dir[0]) 618 { 619 m_gdb_comm.SetWorkingDir (working_dir); 620 } 621 622 // Send the environment and the program + arguments after we connect 623 const Args &environment = launch_info.GetEnvironmentEntries(); 624 if (environment.GetArgumentCount()) 625 { 626 size_t num_environment_entries = environment.GetArgumentCount(); 627 for (size_t i=0; i<num_environment_entries; ++i) 628 { 629 const char *env_entry = environment.GetArgumentAtIndex(i); 630 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 631 break; 632 } 633 } 634 635 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 636 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 637 if (arg_packet_err == 0) 638 { 639 std::string error_str; 640 if (m_gdb_comm.GetLaunchSuccess (error_str)) 641 { 642 SetID (m_gdb_comm.GetCurrentProcessID ()); 643 } 644 else 645 { 646 error.SetErrorString (error_str.c_str()); 647 } 648 } 649 else 650 { 651 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 652 } 653 654 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 655 656 if (GetID() == LLDB_INVALID_PROCESS_ID) 657 { 658 if (log) 659 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 660 KillDebugserverProcess (); 661 return error; 662 } 663 664 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 665 { 666 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 667 668 if (!disable_stdio) 669 { 670 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 671 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 672 } 673 } 674 } 675 else 676 { 677 if (log) 678 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 679 } 680 } 681 else 682 { 683 // Set our user ID to an invalid process ID. 684 SetID(LLDB_INVALID_PROCESS_ID); 685 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 686 exe_module->GetFileSpec().GetFilename().AsCString(), 687 exe_module->GetArchitecture().GetArchitectureName()); 688 } 689 return error; 690 691 } 692 693 694 Error 695 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 696 { 697 Error error; 698 // Sleep and wait a bit for debugserver to start to listen... 699 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 700 if (conn_ap.get()) 701 { 702 const uint32_t max_retry_count = 50; 703 uint32_t retry_count = 0; 704 while (!m_gdb_comm.IsConnected()) 705 { 706 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 707 { 708 m_gdb_comm.SetConnection (conn_ap.release()); 709 break; 710 } 711 retry_count++; 712 713 if (retry_count >= max_retry_count) 714 break; 715 716 usleep (100000); 717 } 718 } 719 720 if (!m_gdb_comm.IsConnected()) 721 { 722 if (error.Success()) 723 error.SetErrorString("not connected to remote gdb server"); 724 return error; 725 } 726 727 // We always seem to be able to open a connection to a local port 728 // so we need to make sure we can then send data to it. If we can't 729 // then we aren't actually connected to anything, so try and do the 730 // handshake with the remote GDB server and make sure that goes 731 // alright. 732 if (!m_gdb_comm.HandshakeWithServer (NULL)) 733 { 734 m_gdb_comm.Disconnect(); 735 if (error.Success()) 736 error.SetErrorString("not connected to remote gdb server"); 737 return error; 738 } 739 m_gdb_comm.ResetDiscoverableSettings(); 740 m_gdb_comm.QueryNoAckModeSupported (); 741 m_gdb_comm.GetThreadSuffixSupported (); 742 m_gdb_comm.GetListThreadsInStopReplySupported (); 743 m_gdb_comm.GetHostInfo (); 744 m_gdb_comm.GetVContSupported ('c'); 745 m_gdb_comm.GetVAttachOrWaitSupported(); 746 747 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 748 for (size_t idx = 0; idx < num_cmds; idx++) 749 { 750 StringExtractorGDBRemote response; 751 printf ("Sending command: \%s.\n", GetExtraStartupCommands().GetArgumentAtIndex(idx)); 752 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 753 } 754 return error; 755 } 756 757 void 758 ProcessGDBRemote::DidLaunchOrAttach () 759 { 760 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 761 if (log) 762 log->Printf ("ProcessGDBRemote::DidLaunch()"); 763 if (GetID() != LLDB_INVALID_PROCESS_ID) 764 { 765 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 766 767 BuildDynamicRegisterInfo (false); 768 769 // See if the GDB server supports the qHostInfo information 770 771 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 772 if (gdb_remote_arch.IsValid()) 773 { 774 ArchSpec &target_arch = GetTarget().GetArchitecture(); 775 776 if (target_arch.IsValid()) 777 { 778 // If the remote host is ARM and we have apple as the vendor, then 779 // ARM executables and shared libraries can have mixed ARM architectures. 780 // You can have an armv6 executable, and if the host is armv7, then the 781 // system will load the best possible architecture for all shared libraries 782 // it has, so we really need to take the remote host architecture as our 783 // defacto architecture in this case. 784 785 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 786 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 787 { 788 target_arch = gdb_remote_arch; 789 } 790 else 791 { 792 // Fill in what is missing in the triple 793 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 794 llvm::Triple &target_triple = target_arch.GetTriple(); 795 if (target_triple.getVendorName().size() == 0) 796 { 797 target_triple.setVendor (remote_triple.getVendor()); 798 799 if (target_triple.getOSName().size() == 0) 800 { 801 target_triple.setOS (remote_triple.getOS()); 802 803 if (target_triple.getEnvironmentName().size() == 0) 804 target_triple.setEnvironment (remote_triple.getEnvironment()); 805 } 806 } 807 } 808 } 809 else 810 { 811 // The target doesn't have a valid architecture yet, set it from 812 // the architecture we got from the remote GDB server 813 target_arch = gdb_remote_arch; 814 } 815 } 816 } 817 } 818 819 void 820 ProcessGDBRemote::DidLaunch () 821 { 822 DidLaunchOrAttach (); 823 } 824 825 Error 826 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 827 { 828 ProcessAttachInfo attach_info; 829 return DoAttachToProcessWithID(attach_pid, attach_info); 830 } 831 832 Error 833 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 834 { 835 Error error; 836 // Clear out and clean up from any current state 837 Clear(); 838 if (attach_pid != LLDB_INVALID_PROCESS_ID) 839 { 840 // Make sure we aren't already connected? 841 if (!m_gdb_comm.IsConnected()) 842 { 843 char host_port[128]; 844 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 845 char connect_url[128]; 846 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 847 848 error = StartDebugserverProcess (host_port, attach_info); 849 850 if (error.Fail()) 851 { 852 const char *error_string = error.AsCString(); 853 if (error_string == NULL) 854 error_string = "unable to launch " DEBUGSERVER_BASENAME; 855 856 SetExitStatus (-1, error_string); 857 } 858 else 859 { 860 error = ConnectToDebugserver (connect_url); 861 } 862 } 863 864 if (error.Success()) 865 { 866 char packet[64]; 867 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%llx", attach_pid); 868 SetID (attach_pid); 869 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 870 } 871 } 872 return error; 873 } 874 875 size_t 876 ProcessGDBRemote::AttachInputReaderCallback 877 ( 878 void *baton, 879 InputReader *reader, 880 lldb::InputReaderAction notification, 881 const char *bytes, 882 size_t bytes_len 883 ) 884 { 885 if (notification == eInputReaderGotToken) 886 { 887 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 888 if (gdb_process->m_waiting_for_attach) 889 gdb_process->m_waiting_for_attach = false; 890 reader->SetIsDone(true); 891 return 1; 892 } 893 return 0; 894 } 895 896 Error 897 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 898 { 899 Error error; 900 // Clear out and clean up from any current state 901 Clear(); 902 903 if (process_name && process_name[0]) 904 { 905 // Make sure we aren't already connected? 906 if (!m_gdb_comm.IsConnected()) 907 { 908 char host_port[128]; 909 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 910 char connect_url[128]; 911 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 912 913 error = StartDebugserverProcess (host_port, attach_info); 914 if (error.Fail()) 915 { 916 const char *error_string = error.AsCString(); 917 if (error_string == NULL) 918 error_string = "unable to launch " DEBUGSERVER_BASENAME; 919 920 SetExitStatus (-1, error_string); 921 } 922 else 923 { 924 error = ConnectToDebugserver (connect_url); 925 } 926 } 927 928 if (error.Success()) 929 { 930 StreamString packet; 931 932 if (wait_for_launch) 933 { 934 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 935 { 936 packet.PutCString ("vAttachWait"); 937 } 938 else 939 { 940 if (attach_info.GetIgnoreExisting()) 941 packet.PutCString("vAttachWait"); 942 else 943 packet.PutCString ("vAttachOrWait"); 944 } 945 } 946 else 947 packet.PutCString("vAttachName"); 948 packet.PutChar(';'); 949 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 950 951 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 952 953 } 954 } 955 return error; 956 } 957 958 959 void 960 ProcessGDBRemote::DidAttach () 961 { 962 DidLaunchOrAttach (); 963 } 964 965 Error 966 ProcessGDBRemote::WillResume () 967 { 968 m_continue_c_tids.clear(); 969 m_continue_C_tids.clear(); 970 m_continue_s_tids.clear(); 971 m_continue_S_tids.clear(); 972 return Error(); 973 } 974 975 Error 976 ProcessGDBRemote::DoResume () 977 { 978 Error error; 979 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 980 if (log) 981 log->Printf ("ProcessGDBRemote::Resume()"); 982 983 Listener listener ("gdb-remote.resume-packet-sent"); 984 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 985 { 986 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 987 988 StreamString continue_packet; 989 bool continue_packet_error = false; 990 if (m_gdb_comm.HasAnyVContSupport ()) 991 { 992 continue_packet.PutCString ("vCont"); 993 994 if (!m_continue_c_tids.empty()) 995 { 996 if (m_gdb_comm.GetVContSupported ('c')) 997 { 998 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) 999 continue_packet.Printf(";c:%4.4llx", *t_pos); 1000 } 1001 else 1002 continue_packet_error = true; 1003 } 1004 1005 if (!continue_packet_error && !m_continue_C_tids.empty()) 1006 { 1007 if (m_gdb_comm.GetVContSupported ('C')) 1008 { 1009 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) 1010 continue_packet.Printf(";C%2.2x:%4.4llx", s_pos->second, s_pos->first); 1011 } 1012 else 1013 continue_packet_error = true; 1014 } 1015 1016 if (!continue_packet_error && !m_continue_s_tids.empty()) 1017 { 1018 if (m_gdb_comm.GetVContSupported ('s')) 1019 { 1020 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) 1021 continue_packet.Printf(";s:%4.4llx", *t_pos); 1022 } 1023 else 1024 continue_packet_error = true; 1025 } 1026 1027 if (!continue_packet_error && !m_continue_S_tids.empty()) 1028 { 1029 if (m_gdb_comm.GetVContSupported ('S')) 1030 { 1031 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) 1032 continue_packet.Printf(";S%2.2x:%4.4llx", s_pos->second, s_pos->first); 1033 } 1034 else 1035 continue_packet_error = true; 1036 } 1037 1038 if (continue_packet_error) 1039 continue_packet.GetString().clear(); 1040 } 1041 else 1042 continue_packet_error = true; 1043 1044 if (continue_packet_error) 1045 { 1046 // Either no vCont support, or we tried to use part of the vCont 1047 // packet that wasn't supported by the remote GDB server. 1048 // We need to try and make a simple packet that can do our continue 1049 const size_t num_threads = GetThreadList().GetSize(); 1050 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1051 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1052 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1053 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1054 if (num_continue_c_tids > 0) 1055 { 1056 if (num_continue_c_tids == num_threads) 1057 { 1058 // All threads are resuming... 1059 m_gdb_comm.SetCurrentThreadForRun (-1); 1060 continue_packet.PutChar ('c'); 1061 continue_packet_error = false; 1062 } 1063 else if (num_continue_c_tids == 1 && 1064 num_continue_C_tids == 0 && 1065 num_continue_s_tids == 0 && 1066 num_continue_S_tids == 0 ) 1067 { 1068 // Only one thread is continuing 1069 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1070 continue_packet.PutChar ('c'); 1071 continue_packet_error = false; 1072 } 1073 } 1074 1075 if (continue_packet_error && num_continue_C_tids > 0) 1076 { 1077 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1078 num_continue_C_tids > 0 && 1079 num_continue_s_tids == 0 && 1080 num_continue_S_tids == 0 ) 1081 { 1082 const int continue_signo = m_continue_C_tids.front().second; 1083 // Only one thread is continuing 1084 if (num_continue_C_tids > 1) 1085 { 1086 // More that one thread with a signal, yet we don't have 1087 // vCont support and we are being asked to resume each 1088 // thread with a signal, we need to make sure they are 1089 // all the same signal, or we can't issue the continue 1090 // accurately with the current support... 1091 if (num_continue_C_tids > 1) 1092 { 1093 continue_packet_error = false; 1094 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1095 { 1096 if (m_continue_C_tids[i].second != continue_signo) 1097 continue_packet_error = true; 1098 } 1099 } 1100 if (!continue_packet_error) 1101 m_gdb_comm.SetCurrentThreadForRun (-1); 1102 } 1103 else 1104 { 1105 // Set the continue thread ID 1106 continue_packet_error = false; 1107 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1108 } 1109 if (!continue_packet_error) 1110 { 1111 // Add threads continuing with the same signo... 1112 continue_packet.Printf("C%2.2x", continue_signo); 1113 } 1114 } 1115 } 1116 1117 if (continue_packet_error && num_continue_s_tids > 0) 1118 { 1119 if (num_continue_s_tids == num_threads) 1120 { 1121 // All threads are resuming... 1122 m_gdb_comm.SetCurrentThreadForRun (-1); 1123 continue_packet.PutChar ('s'); 1124 continue_packet_error = false; 1125 } 1126 else if (num_continue_c_tids == 0 && 1127 num_continue_C_tids == 0 && 1128 num_continue_s_tids == 1 && 1129 num_continue_S_tids == 0 ) 1130 { 1131 // Only one thread is stepping 1132 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1133 continue_packet.PutChar ('s'); 1134 continue_packet_error = false; 1135 } 1136 } 1137 1138 if (!continue_packet_error && num_continue_S_tids > 0) 1139 { 1140 if (num_continue_S_tids == num_threads) 1141 { 1142 const int step_signo = m_continue_S_tids.front().second; 1143 // Are all threads trying to step with the same signal? 1144 continue_packet_error = false; 1145 if (num_continue_S_tids > 1) 1146 { 1147 for (size_t i=1; i<num_threads; ++i) 1148 { 1149 if (m_continue_S_tids[i].second != step_signo) 1150 continue_packet_error = true; 1151 } 1152 } 1153 if (!continue_packet_error) 1154 { 1155 // Add threads stepping with the same signo... 1156 m_gdb_comm.SetCurrentThreadForRun (-1); 1157 continue_packet.Printf("S%2.2x", step_signo); 1158 } 1159 } 1160 else if (num_continue_c_tids == 0 && 1161 num_continue_C_tids == 0 && 1162 num_continue_s_tids == 0 && 1163 num_continue_S_tids == 1 ) 1164 { 1165 // Only one thread is stepping with signal 1166 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1167 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1168 continue_packet_error = false; 1169 } 1170 } 1171 } 1172 1173 if (continue_packet_error) 1174 { 1175 error.SetErrorString ("can't make continue packet for this resume"); 1176 } 1177 else 1178 { 1179 EventSP event_sp; 1180 TimeValue timeout; 1181 timeout = TimeValue::Now(); 1182 timeout.OffsetWithSeconds (5); 1183 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1184 { 1185 error.SetErrorString ("Trying to resume but the async thread is dead."); 1186 if (log) 1187 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1188 return error; 1189 } 1190 1191 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1192 1193 if (listener.WaitForEvent (&timeout, event_sp) == false) 1194 { 1195 error.SetErrorString("Resume timed out."); 1196 if (log) 1197 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1198 } 1199 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1200 { 1201 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1202 if (log) 1203 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1204 return error; 1205 } 1206 } 1207 } 1208 1209 return error; 1210 } 1211 1212 void 1213 ProcessGDBRemote::ClearThreadIDList () 1214 { 1215 Mutex::Locker locker(m_thread_list.GetMutex()); 1216 m_thread_ids.clear(); 1217 } 1218 1219 bool 1220 ProcessGDBRemote::UpdateThreadIDList () 1221 { 1222 Mutex::Locker locker(m_thread_list.GetMutex()); 1223 bool sequence_mutex_unavailable = false; 1224 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1225 if (sequence_mutex_unavailable) 1226 { 1227 return false; // We just didn't get the list 1228 } 1229 return true; 1230 } 1231 1232 bool 1233 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1234 { 1235 // locker will keep a mutex locked until it goes out of scope 1236 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1237 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1238 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1239 1240 size_t num_thread_ids = m_thread_ids.size(); 1241 // The "m_thread_ids" thread ID list should always be updated after each stop 1242 // reply packet, but in case it isn't, update it here. 1243 if (num_thread_ids == 0) 1244 { 1245 if (!UpdateThreadIDList ()) 1246 return false; 1247 num_thread_ids = m_thread_ids.size(); 1248 } 1249 1250 if (num_thread_ids > 0) 1251 { 1252 for (size_t i=0; i<num_thread_ids; ++i) 1253 { 1254 tid_t tid = m_thread_ids[i]; 1255 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1256 if (!thread_sp) 1257 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1258 new_thread_list.AddThread(thread_sp); 1259 } 1260 } 1261 1262 return true; 1263 } 1264 1265 1266 StateType 1267 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1268 { 1269 stop_packet.SetFilePos (0); 1270 const char stop_type = stop_packet.GetChar(); 1271 switch (stop_type) 1272 { 1273 case 'T': 1274 case 'S': 1275 { 1276 if (GetStopID() == 0) 1277 { 1278 // Our first stop, make sure we have a process ID, and also make 1279 // sure we know about our registers 1280 if (GetID() == LLDB_INVALID_PROCESS_ID) 1281 { 1282 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1283 if (pid != LLDB_INVALID_PROCESS_ID) 1284 SetID (pid); 1285 } 1286 BuildDynamicRegisterInfo (true); 1287 } 1288 // Stop with signal and thread info 1289 const uint8_t signo = stop_packet.GetHexU8(); 1290 std::string name; 1291 std::string value; 1292 std::string thread_name; 1293 std::string reason; 1294 std::string description; 1295 uint32_t exc_type = 0; 1296 std::vector<addr_t> exc_data; 1297 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1298 ThreadSP thread_sp; 1299 1300 while (stop_packet.GetNameColonValue(name, value)) 1301 { 1302 if (name.compare("metype") == 0) 1303 { 1304 // exception type in big endian hex 1305 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1306 } 1307 else if (name.compare("medata") == 0) 1308 { 1309 // exception data in big endian hex 1310 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1311 } 1312 else if (name.compare("thread") == 0) 1313 { 1314 // thread in big endian hex 1315 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1316 // m_thread_list does have its own mutex, but we need to 1317 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1318 // and the m_thread_list.AddThread(...) so it doesn't change on us 1319 Mutex::Locker locker (m_thread_list.GetMutex ()); 1320 thread_sp = m_thread_list.FindThreadByID(tid, false); 1321 if (!thread_sp) 1322 { 1323 // Create the thread if we need to 1324 thread_sp.reset (new ThreadGDBRemote (shared_from_this(), tid)); 1325 m_thread_list.AddThread(thread_sp); 1326 } 1327 } 1328 else if (name.compare("threads") == 0) 1329 { 1330 Mutex::Locker locker(m_thread_list.GetMutex()); 1331 m_thread_ids.clear(); 1332 // A comma separated list of all threads in the current 1333 // process that includes the thread for this stop reply 1334 // packet 1335 size_t comma_pos; 1336 lldb::tid_t tid; 1337 while ((comma_pos = value.find(',')) != std::string::npos) 1338 { 1339 value[comma_pos] = '\0'; 1340 // thread in big endian hex 1341 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1342 if (tid != LLDB_INVALID_THREAD_ID) 1343 m_thread_ids.push_back (tid); 1344 value.erase(0, comma_pos + 1); 1345 1346 } 1347 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1348 if (tid != LLDB_INVALID_THREAD_ID) 1349 m_thread_ids.push_back (tid); 1350 } 1351 else if (name.compare("hexname") == 0) 1352 { 1353 StringExtractor name_extractor; 1354 // Swap "value" over into "name_extractor" 1355 name_extractor.GetStringRef().swap(value); 1356 // Now convert the HEX bytes into a string value 1357 name_extractor.GetHexByteString (value); 1358 thread_name.swap (value); 1359 } 1360 else if (name.compare("name") == 0) 1361 { 1362 thread_name.swap (value); 1363 } 1364 else if (name.compare("qaddr") == 0) 1365 { 1366 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1367 } 1368 else if (name.compare("reason") == 0) 1369 { 1370 reason.swap(value); 1371 } 1372 else if (name.compare("description") == 0) 1373 { 1374 StringExtractor desc_extractor; 1375 // Swap "value" over into "name_extractor" 1376 desc_extractor.GetStringRef().swap(value); 1377 // Now convert the HEX bytes into a string value 1378 desc_extractor.GetHexByteString (thread_name); 1379 } 1380 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1381 { 1382 // We have a register number that contains an expedited 1383 // register value. Lets supply this register to our thread 1384 // so it won't have to go and read it. 1385 if (thread_sp) 1386 { 1387 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1388 1389 if (reg != UINT32_MAX) 1390 { 1391 StringExtractor reg_value_extractor; 1392 // Swap "value" over into "reg_value_extractor" 1393 reg_value_extractor.GetStringRef().swap(value); 1394 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1395 { 1396 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1397 name.c_str(), 1398 reg, 1399 reg, 1400 reg_value_extractor.GetStringRef().c_str(), 1401 stop_packet.GetStringRef().c_str()); 1402 } 1403 } 1404 } 1405 } 1406 } 1407 1408 if (thread_sp) 1409 { 1410 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1411 1412 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1413 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1414 if (exc_type != 0) 1415 { 1416 const size_t exc_data_size = exc_data.size(); 1417 1418 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1419 exc_type, 1420 exc_data_size, 1421 exc_data_size >= 1 ? exc_data[0] : 0, 1422 exc_data_size >= 2 ? exc_data[1] : 0, 1423 exc_data_size >= 3 ? exc_data[2] : 0)); 1424 } 1425 else 1426 { 1427 bool handled = false; 1428 if (!reason.empty()) 1429 { 1430 if (reason.compare("trace") == 0) 1431 { 1432 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1433 handled = true; 1434 } 1435 else if (reason.compare("breakpoint") == 0) 1436 { 1437 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1438 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1439 if (bp_site_sp) 1440 { 1441 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1442 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1443 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1444 handled = true; 1445 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1446 { 1447 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1448 } 1449 else 1450 { 1451 StopInfoSP invalid_stop_info_sp; 1452 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1453 } 1454 } 1455 1456 } 1457 else if (reason.compare("trap") == 0) 1458 { 1459 // Let the trap just use the standard signal stop reason below... 1460 } 1461 else if (reason.compare("watchpoint") == 0) 1462 { 1463 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1464 // TODO: locate the watchpoint somehow... 1465 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1466 handled = true; 1467 } 1468 else if (reason.compare("exception") == 0) 1469 { 1470 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1471 handled = true; 1472 } 1473 } 1474 1475 if (signo) 1476 { 1477 if (signo == SIGTRAP) 1478 { 1479 // Currently we are going to assume SIGTRAP means we are either 1480 // hitting a breakpoint or hardware single stepping. 1481 handled = true; 1482 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1483 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1484 1485 if (bp_site_sp) 1486 { 1487 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1488 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1489 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1490 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1491 { 1492 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1493 } 1494 else 1495 { 1496 StopInfoSP invalid_stop_info_sp; 1497 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1498 } 1499 } 1500 else 1501 { 1502 // TODO: check for breakpoint or trap opcode in case there is a hard 1503 // coded software trap 1504 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1505 } 1506 } 1507 if (!handled) 1508 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1509 } 1510 else 1511 { 1512 StopInfoSP invalid_stop_info_sp; 1513 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1514 } 1515 1516 if (!description.empty()) 1517 { 1518 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1519 if (stop_info_sp) 1520 { 1521 stop_info_sp->SetDescription (description.c_str()); 1522 } 1523 else 1524 { 1525 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1526 } 1527 } 1528 } 1529 } 1530 return eStateStopped; 1531 } 1532 break; 1533 1534 case 'W': 1535 // process exited 1536 return eStateExited; 1537 1538 default: 1539 break; 1540 } 1541 return eStateInvalid; 1542 } 1543 1544 void 1545 ProcessGDBRemote::RefreshStateAfterStop () 1546 { 1547 Mutex::Locker locker(m_thread_list.GetMutex()); 1548 m_thread_ids.clear(); 1549 // Set the thread stop info. It might have a "threads" key whose value is 1550 // a list of all thread IDs in the current process, so m_thread_ids might 1551 // get set. 1552 SetThreadStopInfo (m_last_stop_packet); 1553 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1554 if (m_thread_ids.empty()) 1555 { 1556 // No, we need to fetch the thread list manually 1557 UpdateThreadIDList(); 1558 } 1559 1560 // Let all threads recover from stopping and do any clean up based 1561 // on the previous thread state (if any). 1562 m_thread_list.RefreshStateAfterStop(); 1563 1564 } 1565 1566 Error 1567 ProcessGDBRemote::DoHalt (bool &caused_stop) 1568 { 1569 Error error; 1570 1571 bool timed_out = false; 1572 Mutex::Locker locker; 1573 1574 if (m_public_state.GetValue() == eStateAttaching) 1575 { 1576 // We are being asked to halt during an attach. We need to just close 1577 // our file handle and debugserver will go away, and we can be done... 1578 m_gdb_comm.Disconnect(); 1579 } 1580 else 1581 { 1582 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1583 { 1584 if (timed_out) 1585 error.SetErrorString("timed out sending interrupt packet"); 1586 else 1587 error.SetErrorString("unknown error sending interrupt packet"); 1588 } 1589 1590 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1591 } 1592 return error; 1593 } 1594 1595 Error 1596 ProcessGDBRemote::InterruptIfRunning 1597 ( 1598 bool discard_thread_plans, 1599 bool catch_stop_event, 1600 EventSP &stop_event_sp 1601 ) 1602 { 1603 Error error; 1604 1605 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1606 1607 bool paused_private_state_thread = false; 1608 const bool is_running = m_gdb_comm.IsRunning(); 1609 if (log) 1610 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1611 discard_thread_plans, 1612 catch_stop_event, 1613 is_running); 1614 1615 if (discard_thread_plans) 1616 { 1617 if (log) 1618 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1619 m_thread_list.DiscardThreadPlans(); 1620 } 1621 if (is_running) 1622 { 1623 if (catch_stop_event) 1624 { 1625 if (log) 1626 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1627 PausePrivateStateThread(); 1628 paused_private_state_thread = true; 1629 } 1630 1631 bool timed_out = false; 1632 Mutex::Locker locker; 1633 1634 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1635 { 1636 if (timed_out) 1637 error.SetErrorString("timed out sending interrupt packet"); 1638 else 1639 error.SetErrorString("unknown error sending interrupt packet"); 1640 if (paused_private_state_thread) 1641 ResumePrivateStateThread(); 1642 return error; 1643 } 1644 1645 if (catch_stop_event) 1646 { 1647 // LISTEN HERE 1648 TimeValue timeout_time; 1649 timeout_time = TimeValue::Now(); 1650 timeout_time.OffsetWithSeconds(5); 1651 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1652 1653 timed_out = state == eStateInvalid; 1654 if (log) 1655 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1656 1657 if (timed_out) 1658 error.SetErrorString("unable to verify target stopped"); 1659 } 1660 1661 if (paused_private_state_thread) 1662 { 1663 if (log) 1664 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1665 ResumePrivateStateThread(); 1666 } 1667 } 1668 return error; 1669 } 1670 1671 Error 1672 ProcessGDBRemote::WillDetach () 1673 { 1674 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1675 if (log) 1676 log->Printf ("ProcessGDBRemote::WillDetach()"); 1677 1678 bool discard_thread_plans = true; 1679 bool catch_stop_event = true; 1680 EventSP event_sp; 1681 1682 // FIXME: InterruptIfRunning should be done in the Process base class, or better still make Halt do what is 1683 // needed. This shouldn't be a feature of a particular plugin. 1684 1685 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1686 } 1687 1688 Error 1689 ProcessGDBRemote::DoDetach() 1690 { 1691 Error error; 1692 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1693 if (log) 1694 log->Printf ("ProcessGDBRemote::DoDetach()"); 1695 1696 DisableAllBreakpointSites (); 1697 1698 m_thread_list.DiscardThreadPlans(); 1699 1700 bool success = m_gdb_comm.Detach (); 1701 if (log) 1702 { 1703 if (success) 1704 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1705 else 1706 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1707 } 1708 // Sleep for one second to let the process get all detached... 1709 StopAsyncThread (); 1710 1711 SetPrivateState (eStateDetached); 1712 ResumePrivateStateThread(); 1713 1714 //KillDebugserverProcess (); 1715 return error; 1716 } 1717 1718 1719 Error 1720 ProcessGDBRemote::DoDestroy () 1721 { 1722 Error error; 1723 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1724 if (log) 1725 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1726 1727 // There is a bug in older iOS debugservers where they don't shut down the process 1728 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1729 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1730 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1731 // destroy it again. 1732 // 1733 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1734 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1735 // the debugservers with this bug are equal. There really should be a better way to test this! 1736 // 1737 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1738 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1739 // just do the straight-forward kill. 1740 // 1741 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1742 // necessary (or helpful) to do any of this. 1743 1744 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1745 { 1746 PlatformSP platform_sp = GetTarget().GetPlatform(); 1747 1748 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1749 if (platform_sp 1750 && platform_sp->GetName() 1751 && strcmp (platform_sp->GetName(), PlatformRemoteiOS::GetShortPluginNameStatic()) == 0) 1752 { 1753 if (m_destroy_tried_resuming) 1754 { 1755 if (log) 1756 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1757 } 1758 else 1759 { 1760 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1761 // but we really need it to happen here and it doesn't matter if we do it twice. 1762 m_thread_list.DiscardThreadPlans(); 1763 DisableAllBreakpointSites(); 1764 1765 bool stop_looks_like_crash = false; 1766 ThreadList &threads = GetThreadList(); 1767 1768 { 1769 Mutex::Locker(threads.GetMutex()); 1770 1771 size_t num_threads = threads.GetSize(); 1772 for (size_t i = 0; i < num_threads; i++) 1773 { 1774 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1775 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1776 StopReason reason = eStopReasonInvalid; 1777 if (stop_info_sp) 1778 reason = stop_info_sp->GetStopReason(); 1779 if (reason == eStopReasonBreakpoint 1780 || reason == eStopReasonException) 1781 { 1782 if (log) 1783 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: %lld stopped with reason: %s.", 1784 thread_sp->GetID(), 1785 stop_info_sp->GetDescription()); 1786 stop_looks_like_crash = true; 1787 break; 1788 } 1789 } 1790 } 1791 1792 if (stop_looks_like_crash) 1793 { 1794 if (log) 1795 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1796 m_destroy_tried_resuming = true; 1797 1798 // If we are going to run again before killing, it would be good to suspend all the threads 1799 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1800 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1801 // have to run the risk of letting those threads proceed a bit. 1802 1803 { 1804 Mutex::Locker(threads.GetMutex()); 1805 1806 size_t num_threads = threads.GetSize(); 1807 for (size_t i = 0; i < num_threads; i++) 1808 { 1809 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1810 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1811 StopReason reason = eStopReasonInvalid; 1812 if (stop_info_sp) 1813 reason = stop_info_sp->GetStopReason(); 1814 if (reason != eStopReasonBreakpoint 1815 && reason != eStopReasonException) 1816 { 1817 if (log) 1818 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: %lld before running.", 1819 thread_sp->GetID()); 1820 thread_sp->SetResumeState(eStateSuspended); 1821 } 1822 } 1823 } 1824 Resume (); 1825 return Destroy(); 1826 } 1827 } 1828 } 1829 } 1830 1831 // Interrupt if our inferior is running... 1832 int exit_status = SIGABRT; 1833 std::string exit_string; 1834 1835 if (m_gdb_comm.IsConnected()) 1836 { 1837 if (m_public_state.GetValue() != eStateAttaching) 1838 { 1839 1840 StringExtractorGDBRemote response; 1841 bool send_async = true; 1842 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1843 { 1844 char packet_cmd = response.GetChar(0); 1845 1846 if (packet_cmd == 'W' || packet_cmd == 'X') 1847 { 1848 SetLastStopPacket (response); 1849 ClearThreadIDList (); 1850 exit_status = response.GetHexU8(); 1851 } 1852 else 1853 { 1854 if (log) 1855 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 1856 exit_string.assign("got unexpected response to k packet: "); 1857 exit_string.append(response.GetStringRef()); 1858 } 1859 } 1860 else 1861 { 1862 if (log) 1863 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1864 exit_string.assign("failed to send the k packet"); 1865 } 1866 } 1867 else 1868 { 1869 if (log) 1870 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1871 exit_string.assign ("killed or interrupted while attaching."); 1872 } 1873 } 1874 else 1875 { 1876 // If we missed setting the exit status on the way out, do it here. 1877 // NB set exit status can be called multiple times, the first one sets the status. 1878 exit_string.assign("destroying when not connected to debugserver"); 1879 } 1880 1881 SetExitStatus(exit_status, exit_string.c_str()); 1882 1883 StopAsyncThread (); 1884 KillDebugserverProcess (); 1885 return error; 1886 } 1887 1888 //------------------------------------------------------------------ 1889 // Process Queries 1890 //------------------------------------------------------------------ 1891 1892 bool 1893 ProcessGDBRemote::IsAlive () 1894 { 1895 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1896 } 1897 1898 addr_t 1899 ProcessGDBRemote::GetImageInfoAddress() 1900 { 1901 return m_gdb_comm.GetShlibInfoAddr(); 1902 } 1903 1904 //------------------------------------------------------------------ 1905 // Process Memory 1906 //------------------------------------------------------------------ 1907 size_t 1908 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1909 { 1910 if (size > m_max_memory_size) 1911 { 1912 // Keep memory read sizes down to a sane limit. This function will be 1913 // called multiple times in order to complete the task by 1914 // lldb_private::Process so it is ok to do this. 1915 size = m_max_memory_size; 1916 } 1917 1918 char packet[64]; 1919 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%zx", (uint64_t)addr, size); 1920 assert (packet_len + 1 < sizeof(packet)); 1921 StringExtractorGDBRemote response; 1922 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1923 { 1924 if (response.IsNormalResponse()) 1925 { 1926 error.Clear(); 1927 return response.GetHexBytes(buf, size, '\xdd'); 1928 } 1929 else if (response.IsErrorResponse()) 1930 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1931 else if (response.IsUnsupportedResponse()) 1932 error.SetErrorStringWithFormat("'%s' packet unsupported", packet); 1933 else 1934 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet, response.GetStringRef().c_str()); 1935 } 1936 else 1937 { 1938 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1939 } 1940 return 0; 1941 } 1942 1943 size_t 1944 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1945 { 1946 if (size > m_max_memory_size) 1947 { 1948 // Keep memory read sizes down to a sane limit. This function will be 1949 // called multiple times in order to complete the task by 1950 // lldb_private::Process so it is ok to do this. 1951 size = m_max_memory_size; 1952 } 1953 1954 StreamString packet; 1955 packet.Printf("M%llx,%zx:", addr, size); 1956 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1957 StringExtractorGDBRemote response; 1958 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1959 { 1960 if (response.IsOKResponse()) 1961 { 1962 error.Clear(); 1963 return size; 1964 } 1965 else if (response.IsErrorResponse()) 1966 error.SetErrorStringWithFormat("gdb remote returned an error: %s", response.GetStringRef().c_str()); 1967 else if (response.IsUnsupportedResponse()) 1968 error.SetErrorStringWithFormat("'%s' packet unsupported", packet.GetString().c_str()); 1969 else 1970 error.SetErrorStringWithFormat("unexpected response to '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1971 } 1972 else 1973 { 1974 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1975 } 1976 return 0; 1977 } 1978 1979 lldb::addr_t 1980 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1981 { 1982 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1983 1984 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1985 switch (supported) 1986 { 1987 case eLazyBoolCalculate: 1988 case eLazyBoolYes: 1989 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1990 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1991 return allocated_addr; 1992 1993 case eLazyBoolNo: 1994 // Call mmap() to create memory in the inferior.. 1995 unsigned prot = 0; 1996 if (permissions & lldb::ePermissionsReadable) 1997 prot |= eMmapProtRead; 1998 if (permissions & lldb::ePermissionsWritable) 1999 prot |= eMmapProtWrite; 2000 if (permissions & lldb::ePermissionsExecutable) 2001 prot |= eMmapProtExec; 2002 2003 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2004 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2005 m_addr_to_mmap_size[allocated_addr] = size; 2006 else 2007 allocated_addr = LLDB_INVALID_ADDRESS; 2008 break; 2009 } 2010 2011 if (allocated_addr == LLDB_INVALID_ADDRESS) 2012 error.SetErrorStringWithFormat("unable to allocate %zu bytes of memory with permissions %s", size, GetPermissionsAsCString (permissions)); 2013 else 2014 error.Clear(); 2015 return allocated_addr; 2016 } 2017 2018 Error 2019 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2020 MemoryRegionInfo ®ion_info) 2021 { 2022 2023 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2024 return error; 2025 } 2026 2027 Error 2028 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2029 { 2030 2031 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2032 return error; 2033 } 2034 2035 Error 2036 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2037 { 2038 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2039 return error; 2040 } 2041 2042 Error 2043 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2044 { 2045 Error error; 2046 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2047 2048 switch (supported) 2049 { 2050 case eLazyBoolCalculate: 2051 // We should never be deallocating memory without allocating memory 2052 // first so we should never get eLazyBoolCalculate 2053 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2054 break; 2055 2056 case eLazyBoolYes: 2057 if (!m_gdb_comm.DeallocateMemory (addr)) 2058 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 2059 break; 2060 2061 case eLazyBoolNo: 2062 // Call munmap() to deallocate memory in the inferior.. 2063 { 2064 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2065 if (pos != m_addr_to_mmap_size.end() && 2066 InferiorCallMunmap(this, addr, pos->second)) 2067 m_addr_to_mmap_size.erase (pos); 2068 else 2069 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 2070 } 2071 break; 2072 } 2073 2074 return error; 2075 } 2076 2077 2078 //------------------------------------------------------------------ 2079 // Process STDIO 2080 //------------------------------------------------------------------ 2081 size_t 2082 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2083 { 2084 if (m_stdio_communication.IsConnected()) 2085 { 2086 ConnectionStatus status; 2087 m_stdio_communication.Write(src, src_len, status, NULL); 2088 } 2089 return 0; 2090 } 2091 2092 Error 2093 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 2094 { 2095 Error error; 2096 assert (bp_site != NULL); 2097 2098 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2099 user_id_t site_id = bp_site->GetID(); 2100 const addr_t addr = bp_site->GetLoadAddress(); 2101 if (log) 2102 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 2103 2104 if (bp_site->IsEnabled()) 2105 { 2106 if (log) 2107 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2108 return error; 2109 } 2110 else 2111 { 2112 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2113 2114 if (bp_site->HardwarePreferred()) 2115 { 2116 // Try and set hardware breakpoint, and if that fails, fall through 2117 // and set a software breakpoint? 2118 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2119 { 2120 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2121 { 2122 bp_site->SetEnabled(true); 2123 bp_site->SetType (BreakpointSite::eHardware); 2124 return error; 2125 } 2126 } 2127 } 2128 2129 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2130 { 2131 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2132 { 2133 bp_site->SetEnabled(true); 2134 bp_site->SetType (BreakpointSite::eExternal); 2135 return error; 2136 } 2137 } 2138 2139 return EnableSoftwareBreakpoint (bp_site); 2140 } 2141 2142 if (log) 2143 { 2144 const char *err_string = error.AsCString(); 2145 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 2146 bp_site->GetLoadAddress(), 2147 err_string ? err_string : "NULL"); 2148 } 2149 // We shouldn't reach here on a successful breakpoint enable... 2150 if (error.Success()) 2151 error.SetErrorToGenericError(); 2152 return error; 2153 } 2154 2155 Error 2156 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 2157 { 2158 Error error; 2159 assert (bp_site != NULL); 2160 addr_t addr = bp_site->GetLoadAddress(); 2161 user_id_t site_id = bp_site->GetID(); 2162 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2163 if (log) 2164 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 2165 2166 if (bp_site->IsEnabled()) 2167 { 2168 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2169 2170 BreakpointSite::Type bp_type = bp_site->GetType(); 2171 switch (bp_type) 2172 { 2173 case BreakpointSite::eSoftware: 2174 error = DisableSoftwareBreakpoint (bp_site); 2175 break; 2176 2177 case BreakpointSite::eHardware: 2178 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2179 error.SetErrorToGenericError(); 2180 break; 2181 2182 case BreakpointSite::eExternal: 2183 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2184 error.SetErrorToGenericError(); 2185 break; 2186 } 2187 if (error.Success()) 2188 bp_site->SetEnabled(false); 2189 } 2190 else 2191 { 2192 if (log) 2193 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2194 return error; 2195 } 2196 2197 if (error.Success()) 2198 error.SetErrorToGenericError(); 2199 return error; 2200 } 2201 2202 // Pre-requisite: wp != NULL. 2203 static GDBStoppointType 2204 GetGDBStoppointType (Watchpoint *wp) 2205 { 2206 assert(wp); 2207 bool watch_read = wp->WatchpointRead(); 2208 bool watch_write = wp->WatchpointWrite(); 2209 2210 // watch_read and watch_write cannot both be false. 2211 assert(watch_read || watch_write); 2212 if (watch_read && watch_write) 2213 return eWatchpointReadWrite; 2214 else if (watch_read) 2215 return eWatchpointRead; 2216 else // Must be watch_write, then. 2217 return eWatchpointWrite; 2218 } 2219 2220 Error 2221 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 2222 { 2223 Error error; 2224 if (wp) 2225 { 2226 user_id_t watchID = wp->GetID(); 2227 addr_t addr = wp->GetLoadAddress(); 2228 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2229 if (log) 2230 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 2231 if (wp->IsEnabled()) 2232 { 2233 if (log) 2234 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 2235 return error; 2236 } 2237 2238 GDBStoppointType type = GetGDBStoppointType(wp); 2239 // Pass down an appropriate z/Z packet... 2240 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2241 { 2242 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2243 { 2244 wp->SetEnabled(true); 2245 return error; 2246 } 2247 else 2248 error.SetErrorString("sending gdb watchpoint packet failed"); 2249 } 2250 else 2251 error.SetErrorString("watchpoints not supported"); 2252 } 2253 else 2254 { 2255 error.SetErrorString("Watchpoint argument was NULL."); 2256 } 2257 if (error.Success()) 2258 error.SetErrorToGenericError(); 2259 return error; 2260 } 2261 2262 Error 2263 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 2264 { 2265 Error error; 2266 if (wp) 2267 { 2268 user_id_t watchID = wp->GetID(); 2269 2270 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2271 2272 addr_t addr = wp->GetLoadAddress(); 2273 if (log) 2274 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 2275 2276 if (!wp->IsEnabled()) 2277 { 2278 if (log) 2279 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2280 return error; 2281 } 2282 2283 if (wp->IsHardware()) 2284 { 2285 GDBStoppointType type = GetGDBStoppointType(wp); 2286 // Pass down an appropriate z/Z packet... 2287 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2288 { 2289 wp->SetEnabled(false); 2290 return error; 2291 } 2292 else 2293 error.SetErrorString("sending gdb watchpoint packet failed"); 2294 } 2295 // TODO: clear software watchpoints if we implement them 2296 } 2297 else 2298 { 2299 error.SetErrorString("Watchpoint argument was NULL."); 2300 } 2301 if (error.Success()) 2302 error.SetErrorToGenericError(); 2303 return error; 2304 } 2305 2306 void 2307 ProcessGDBRemote::Clear() 2308 { 2309 m_flags = 0; 2310 m_thread_list.Clear(); 2311 } 2312 2313 Error 2314 ProcessGDBRemote::DoSignal (int signo) 2315 { 2316 Error error; 2317 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2318 if (log) 2319 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2320 2321 if (!m_gdb_comm.SendAsyncSignal (signo)) 2322 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2323 return error; 2324 } 2325 2326 Error 2327 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2328 { 2329 ProcessLaunchInfo launch_info; 2330 return StartDebugserverProcess(debugserver_url, launch_info); 2331 } 2332 2333 Error 2334 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2335 { 2336 Error error; 2337 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2338 { 2339 // If we locate debugserver, keep that located version around 2340 static FileSpec g_debugserver_file_spec; 2341 2342 ProcessLaunchInfo debugserver_launch_info; 2343 char debugserver_path[PATH_MAX]; 2344 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2345 2346 // Always check to see if we have an environment override for the path 2347 // to the debugserver to use and use it if we do. 2348 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2349 if (env_debugserver_path) 2350 debugserver_file_spec.SetFile (env_debugserver_path, false); 2351 else 2352 debugserver_file_spec = g_debugserver_file_spec; 2353 bool debugserver_exists = debugserver_file_spec.Exists(); 2354 if (!debugserver_exists) 2355 { 2356 // The debugserver binary is in the LLDB.framework/Resources 2357 // directory. 2358 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2359 { 2360 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2361 debugserver_exists = debugserver_file_spec.Exists(); 2362 if (debugserver_exists) 2363 { 2364 g_debugserver_file_spec = debugserver_file_spec; 2365 } 2366 else 2367 { 2368 g_debugserver_file_spec.Clear(); 2369 debugserver_file_spec.Clear(); 2370 } 2371 } 2372 } 2373 2374 if (debugserver_exists) 2375 { 2376 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2377 2378 m_stdio_communication.Clear(); 2379 2380 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2381 2382 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2383 char arg_cstr[PATH_MAX]; 2384 2385 // Start args with "debugserver /file/path -r --" 2386 debugserver_args.AppendArgument(debugserver_path); 2387 debugserver_args.AppendArgument(debugserver_url); 2388 // use native registers, not the GDB registers 2389 debugserver_args.AppendArgument("--native-regs"); 2390 // make debugserver run in its own session so signals generated by 2391 // special terminal key sequences (^C) don't affect debugserver 2392 debugserver_args.AppendArgument("--setsid"); 2393 2394 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2395 if (env_debugserver_log_file) 2396 { 2397 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2398 debugserver_args.AppendArgument(arg_cstr); 2399 } 2400 2401 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2402 if (env_debugserver_log_flags) 2403 { 2404 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2405 debugserver_args.AppendArgument(arg_cstr); 2406 } 2407 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2408 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2409 2410 // We currently send down all arguments, attach pids, or attach 2411 // process names in dedicated GDB server packets, so we don't need 2412 // to pass them as arguments. This is currently because of all the 2413 // things we need to setup prior to launching: the environment, 2414 // current working dir, file actions, etc. 2415 #if 0 2416 // Now append the program arguments 2417 if (inferior_argv) 2418 { 2419 // Terminate the debugserver args so we can now append the inferior args 2420 debugserver_args.AppendArgument("--"); 2421 2422 for (int i = 0; inferior_argv[i] != NULL; ++i) 2423 debugserver_args.AppendArgument (inferior_argv[i]); 2424 } 2425 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2426 { 2427 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2428 debugserver_args.AppendArgument (arg_cstr); 2429 } 2430 else if (attach_name && attach_name[0]) 2431 { 2432 if (wait_for_launch) 2433 debugserver_args.AppendArgument ("--waitfor"); 2434 else 2435 debugserver_args.AppendArgument ("--attach"); 2436 debugserver_args.AppendArgument (attach_name); 2437 } 2438 #endif 2439 2440 ProcessLaunchInfo::FileAction file_action; 2441 2442 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2443 // to "/dev/null" if we run into any problems. 2444 file_action.Close (STDIN_FILENO); 2445 debugserver_launch_info.AppendFileAction (file_action); 2446 file_action.Close (STDOUT_FILENO); 2447 debugserver_launch_info.AppendFileAction (file_action); 2448 file_action.Close (STDERR_FILENO); 2449 debugserver_launch_info.AppendFileAction (file_action); 2450 2451 if (log) 2452 { 2453 StreamString strm; 2454 debugserver_args.Dump (&strm); 2455 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2456 } 2457 2458 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2459 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2460 2461 error = Host::LaunchProcess(debugserver_launch_info); 2462 2463 if (error.Success ()) 2464 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2465 else 2466 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2467 2468 if (error.Fail() || log) 2469 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%llu, path='%s'", m_debugserver_pid, debugserver_path); 2470 } 2471 else 2472 { 2473 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2474 } 2475 2476 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2477 StartAsyncThread (); 2478 } 2479 return error; 2480 } 2481 2482 bool 2483 ProcessGDBRemote::MonitorDebugserverProcess 2484 ( 2485 void *callback_baton, 2486 lldb::pid_t debugserver_pid, 2487 bool exited, // True if the process did exit 2488 int signo, // Zero for no signal 2489 int exit_status // Exit value of process if signal is zero 2490 ) 2491 { 2492 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2493 // and might not exist anymore, so we need to carefully try to get the 2494 // target for this process first since we have a race condition when 2495 // we are done running between getting the notice that the inferior 2496 // process has died and the debugserver that was debugging this process. 2497 // In our test suite, we are also continually running process after 2498 // process, so we must be very careful to make sure: 2499 // 1 - process object hasn't been deleted already 2500 // 2 - that a new process object hasn't been recreated in its place 2501 2502 // "debugserver_pid" argument passed in is the process ID for 2503 // debugserver that we are tracking... 2504 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2505 2506 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2507 2508 // Get a shared pointer to the target that has a matching process pointer. 2509 // This target could be gone, or the target could already have a new process 2510 // object inside of it 2511 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2512 2513 if (log) 2514 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%llu, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2515 2516 if (target_sp) 2517 { 2518 // We found a process in a target that matches, but another thread 2519 // might be in the process of launching a new process that will 2520 // soon replace it, so get a shared pointer to the process so we 2521 // can keep it alive. 2522 ProcessSP process_sp (target_sp->GetProcessSP()); 2523 // Now we have a shared pointer to the process that can't go away on us 2524 // so we now make sure it was the same as the one passed in, and also make 2525 // sure that our previous "process *" didn't get deleted and have a new 2526 // "process *" created in its place with the same pointer. To verify this 2527 // we make sure the process has our debugserver process ID. If we pass all 2528 // of these tests, then we are sure that this process is the one we were 2529 // looking for. 2530 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2531 { 2532 // Sleep for a half a second to make sure our inferior process has 2533 // time to set its exit status before we set it incorrectly when 2534 // both the debugserver and the inferior process shut down. 2535 usleep (500000); 2536 // If our process hasn't yet exited, debugserver might have died. 2537 // If the process did exit, the we are reaping it. 2538 const StateType state = process->GetState(); 2539 2540 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2541 state != eStateInvalid && 2542 state != eStateUnloaded && 2543 state != eStateExited && 2544 state != eStateDetached) 2545 { 2546 char error_str[1024]; 2547 if (signo) 2548 { 2549 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2550 if (signal_cstr) 2551 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2552 else 2553 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2554 } 2555 else 2556 { 2557 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2558 } 2559 2560 process->SetExitStatus (-1, error_str); 2561 } 2562 // Debugserver has exited we need to let our ProcessGDBRemote 2563 // know that it no longer has a debugserver instance 2564 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2565 } 2566 } 2567 return true; 2568 } 2569 2570 void 2571 ProcessGDBRemote::KillDebugserverProcess () 2572 { 2573 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2574 { 2575 ::kill (m_debugserver_pid, SIGINT); 2576 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2577 } 2578 } 2579 2580 void 2581 ProcessGDBRemote::Initialize() 2582 { 2583 static bool g_initialized = false; 2584 2585 if (g_initialized == false) 2586 { 2587 g_initialized = true; 2588 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2589 GetPluginDescriptionStatic(), 2590 CreateInstance); 2591 2592 Log::Callbacks log_callbacks = { 2593 ProcessGDBRemoteLog::DisableLog, 2594 ProcessGDBRemoteLog::EnableLog, 2595 ProcessGDBRemoteLog::ListLogCategories 2596 }; 2597 2598 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2599 } 2600 } 2601 2602 bool 2603 ProcessGDBRemote::StartAsyncThread () 2604 { 2605 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2606 2607 if (log) 2608 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2609 2610 // Create a thread that watches our internal state and controls which 2611 // events make it to clients (into the DCProcess event queue). 2612 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2613 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2614 } 2615 2616 void 2617 ProcessGDBRemote::StopAsyncThread () 2618 { 2619 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2620 2621 if (log) 2622 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2623 2624 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2625 2626 // This will shut down the async thread. 2627 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2628 2629 // Stop the stdio thread 2630 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2631 { 2632 Host::ThreadJoin (m_async_thread, NULL, NULL); 2633 } 2634 } 2635 2636 2637 void * 2638 ProcessGDBRemote::AsyncThread (void *arg) 2639 { 2640 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2641 2642 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2643 if (log) 2644 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2645 2646 Listener listener ("ProcessGDBRemote::AsyncThread"); 2647 EventSP event_sp; 2648 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2649 eBroadcastBitAsyncThreadShouldExit; 2650 2651 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2652 { 2653 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2654 2655 bool done = false; 2656 while (!done) 2657 { 2658 if (log) 2659 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2660 if (listener.WaitForEvent (NULL, event_sp)) 2661 { 2662 const uint32_t event_type = event_sp->GetType(); 2663 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2664 { 2665 if (log) 2666 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2667 2668 switch (event_type) 2669 { 2670 case eBroadcastBitAsyncContinue: 2671 { 2672 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2673 2674 if (continue_packet) 2675 { 2676 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2677 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2678 if (log) 2679 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2680 2681 if (::strstr (continue_cstr, "vAttach") == NULL) 2682 process->SetPrivateState(eStateRunning); 2683 StringExtractorGDBRemote response; 2684 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2685 2686 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2687 // The thread ID list might be contained within the "response", or the stop reply packet that 2688 // caused the stop. So clear it now before we give the stop reply packet to the process 2689 // using the process->SetLastStopPacket()... 2690 process->ClearThreadIDList (); 2691 2692 switch (stop_state) 2693 { 2694 case eStateStopped: 2695 case eStateCrashed: 2696 case eStateSuspended: 2697 process->SetLastStopPacket (response); 2698 process->SetPrivateState (stop_state); 2699 break; 2700 2701 case eStateExited: 2702 process->SetLastStopPacket (response); 2703 process->ClearThreadIDList(); 2704 response.SetFilePos(1); 2705 process->SetExitStatus(response.GetHexU8(), NULL); 2706 done = true; 2707 break; 2708 2709 case eStateInvalid: 2710 process->SetExitStatus(-1, "lost connection"); 2711 break; 2712 2713 default: 2714 process->SetPrivateState (stop_state); 2715 break; 2716 } 2717 } 2718 } 2719 break; 2720 2721 case eBroadcastBitAsyncThreadShouldExit: 2722 if (log) 2723 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2724 done = true; 2725 break; 2726 2727 default: 2728 if (log) 2729 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2730 done = true; 2731 break; 2732 } 2733 } 2734 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2735 { 2736 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2737 { 2738 process->SetExitStatus (-1, "lost connection"); 2739 done = true; 2740 } 2741 } 2742 } 2743 else 2744 { 2745 if (log) 2746 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2747 done = true; 2748 } 2749 } 2750 } 2751 2752 if (log) 2753 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2754 2755 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2756 return NULL; 2757 } 2758 2759 const char * 2760 ProcessGDBRemote::GetDispatchQueueNameForThread 2761 ( 2762 addr_t thread_dispatch_qaddr, 2763 std::string &dispatch_queue_name 2764 ) 2765 { 2766 dispatch_queue_name.clear(); 2767 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2768 { 2769 // Cache the dispatch_queue_offsets_addr value so we don't always have 2770 // to look it up 2771 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2772 { 2773 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2774 const Symbol *dispatch_queue_offsets_symbol = NULL; 2775 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2776 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2777 if (module_sp) 2778 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2779 2780 if (dispatch_queue_offsets_symbol == NULL) 2781 { 2782 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2783 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2784 if (module_sp) 2785 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2786 } 2787 if (dispatch_queue_offsets_symbol) 2788 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2789 2790 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2791 return NULL; 2792 } 2793 2794 uint8_t memory_buffer[8]; 2795 DataExtractor data (memory_buffer, 2796 sizeof(memory_buffer), 2797 m_target.GetArchitecture().GetByteOrder(), 2798 m_target.GetArchitecture().GetAddressByteSize()); 2799 2800 // Excerpt from src/queue_private.h 2801 struct dispatch_queue_offsets_s 2802 { 2803 uint16_t dqo_version; 2804 uint16_t dqo_label; 2805 uint16_t dqo_label_size; 2806 } dispatch_queue_offsets; 2807 2808 2809 Error error; 2810 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2811 { 2812 uint32_t data_offset = 0; 2813 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2814 { 2815 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2816 { 2817 data_offset = 0; 2818 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2819 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2820 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2821 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2822 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2823 dispatch_queue_name.erase (bytes_read); 2824 } 2825 } 2826 } 2827 } 2828 if (dispatch_queue_name.empty()) 2829 return NULL; 2830 return dispatch_queue_name.c_str(); 2831 } 2832 2833 //uint32_t 2834 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2835 //{ 2836 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2837 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2838 // if (m_local_debugserver) 2839 // { 2840 // return Host::ListProcessesMatchingName (name, matches, pids); 2841 // } 2842 // else 2843 // { 2844 // // FIXME: Implement talking to the remote debugserver. 2845 // return 0; 2846 // } 2847 // 2848 //} 2849 // 2850 bool 2851 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2852 lldb_private::StoppointCallbackContext *context, 2853 lldb::user_id_t break_id, 2854 lldb::user_id_t break_loc_id) 2855 { 2856 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2857 // run so I can stop it if that's what I want to do. 2858 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2859 if (log) 2860 log->Printf("Hit New Thread Notification breakpoint."); 2861 return false; 2862 } 2863 2864 2865 bool 2866 ProcessGDBRemote::StartNoticingNewThreads() 2867 { 2868 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2869 if (m_thread_create_bp_sp) 2870 { 2871 if (log && log->GetVerbose()) 2872 log->Printf("Enabled noticing new thread breakpoint."); 2873 m_thread_create_bp_sp->SetEnabled(true); 2874 } 2875 else 2876 { 2877 PlatformSP platform_sp (m_target.GetPlatform()); 2878 if (platform_sp) 2879 { 2880 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2881 if (m_thread_create_bp_sp) 2882 { 2883 if (log && log->GetVerbose()) 2884 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2885 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2886 } 2887 else 2888 { 2889 if (log) 2890 log->Printf("Failed to create new thread notification breakpoint."); 2891 } 2892 } 2893 } 2894 return m_thread_create_bp_sp.get() != NULL; 2895 } 2896 2897 bool 2898 ProcessGDBRemote::StopNoticingNewThreads() 2899 { 2900 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2901 if (log && log->GetVerbose()) 2902 log->Printf ("Disabling new thread notification breakpoint."); 2903 2904 if (m_thread_create_bp_sp) 2905 m_thread_create_bp_sp->SetEnabled(false); 2906 2907 return true; 2908 } 2909 2910 2911