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 #include "lldb/lldb-python.h" 11 12 // C Includes 13 #include <errno.h> 14 #include <spawn.h> 15 #include <stdlib.h> 16 #include <netinet/in.h> 17 #include <sys/mman.h> // for mmap 18 #include <sys/stat.h> 19 #include <sys/types.h> 20 #include <time.h> 21 22 // C++ Includes 23 #include <algorithm> 24 #include <map> 25 26 // Other libraries and framework includes 27 28 #include "lldb/Breakpoint/Watchpoint.h" 29 #include "lldb/Interpreter/Args.h" 30 #include "lldb/Core/ArchSpec.h" 31 #include "lldb/Core/Debugger.h" 32 #include "lldb/Core/ConnectionFileDescriptor.h" 33 #include "lldb/Host/FileSpec.h" 34 #include "lldb/Core/InputReader.h" 35 #include "lldb/Core/Module.h" 36 #include "lldb/Core/ModuleSpec.h" 37 #include "lldb/Core/PluginManager.h" 38 #include "lldb/Core/State.h" 39 #include "lldb/Core/StreamFile.h" 40 #include "lldb/Core/StreamString.h" 41 #include "lldb/Core/Timer.h" 42 #include "lldb/Core/Value.h" 43 #include "lldb/Host/Symbols.h" 44 #include "lldb/Host/TimeValue.h" 45 #include "lldb/Interpreter/CommandInterpreter.h" 46 #include "lldb/Interpreter/CommandObject.h" 47 #include "lldb/Interpreter/CommandObjectMultiword.h" 48 #include "lldb/Interpreter/CommandReturnObject.h" 49 #include "lldb/Symbol/ObjectFile.h" 50 #include "lldb/Target/DynamicLoader.h" 51 #include "lldb/Target/Target.h" 52 #include "lldb/Target/TargetList.h" 53 #include "lldb/Target/ThreadPlanCallFunction.h" 54 #include "lldb/Utility/PseudoTerminal.h" 55 56 // Project includes 57 #include "lldb/Host/Host.h" 58 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 59 #include "Plugins/Process/Utility/StopInfoMachException.h" 60 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 61 #include "Utility/StringExtractorGDBRemote.h" 62 #include "GDBRemoteRegisterContext.h" 63 #include "ProcessGDBRemote.h" 64 #include "ProcessGDBRemoteLog.h" 65 #include "ThreadGDBRemote.h" 66 67 68 namespace lldb 69 { 70 // Provide a function that can easily dump the packet history if we know a 71 // ProcessGDBRemote * value (which we can get from logs or from debugging). 72 // We need the function in the lldb namespace so it makes it into the final 73 // executable since the LLDB shared library only exports stuff in the lldb 74 // namespace. This allows you to attach with a debugger and call this 75 // function and get the packet history dumped to a file. 76 void 77 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 78 { 79 lldb_private::StreamFile strm; 80 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 81 if (error.Success()) 82 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 83 } 84 } 85 86 87 #define DEBUGSERVER_BASENAME "debugserver" 88 using namespace lldb; 89 using namespace lldb_private; 90 91 static bool rand_initialized = false; 92 93 // TODO Randomly assigning a port is unsafe. We should get an unused 94 // ephemeral port from the kernel and make sure we reserve it before passing 95 // it to debugserver. 96 97 #if defined (__APPLE__) 98 #define LOW_PORT (IPPORT_RESERVED) 99 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 100 #else 101 #define LOW_PORT (1024u) 102 #define HIGH_PORT (49151u) 103 #endif 104 105 static inline uint16_t 106 get_random_port () 107 { 108 if (!rand_initialized) 109 { 110 time_t seed = time(NULL); 111 112 rand_initialized = true; 113 srand(seed); 114 } 115 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 116 } 117 118 119 const char * 120 ProcessGDBRemote::GetPluginNameStatic() 121 { 122 return "gdb-remote"; 123 } 124 125 const char * 126 ProcessGDBRemote::GetPluginDescriptionStatic() 127 { 128 return "GDB Remote protocol based debugging plug-in."; 129 } 130 131 void 132 ProcessGDBRemote::Terminate() 133 { 134 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 135 } 136 137 138 lldb::ProcessSP 139 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 140 { 141 lldb::ProcessSP process_sp; 142 if (crash_file_path == NULL) 143 process_sp.reset (new ProcessGDBRemote (target, listener)); 144 return process_sp; 145 } 146 147 bool 148 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 149 { 150 if (plugin_specified_by_name) 151 return true; 152 153 // For now we are just making sure the file exists for a given module 154 Module *exe_module = target.GetExecutableModulePointer(); 155 if (exe_module) 156 { 157 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 158 // We can't debug core files... 159 switch (exe_objfile->GetType()) 160 { 161 case ObjectFile::eTypeInvalid: 162 case ObjectFile::eTypeCoreFile: 163 case ObjectFile::eTypeDebugInfo: 164 case ObjectFile::eTypeObjectFile: 165 case ObjectFile::eTypeSharedLibrary: 166 case ObjectFile::eTypeStubLibrary: 167 return false; 168 case ObjectFile::eTypeExecutable: 169 case ObjectFile::eTypeDynamicLinker: 170 case ObjectFile::eTypeUnknown: 171 break; 172 } 173 return exe_module->GetFileSpec().Exists(); 174 } 175 // However, if there is no executable module, we return true since we might be preparing to attach. 176 return true; 177 } 178 179 //---------------------------------------------------------------------- 180 // ProcessGDBRemote constructor 181 //---------------------------------------------------------------------- 182 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 183 Process (target, listener), 184 m_flags (0), 185 m_gdb_comm(false), 186 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 187 m_last_stop_packet (), 188 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 189 m_register_info (), 190 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 191 m_async_thread (LLDB_INVALID_HOST_THREAD), 192 m_async_thread_state(eAsyncThreadNotStarted), 193 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 194 m_thread_ids (), 195 m_continue_c_tids (), 196 m_continue_C_tids (), 197 m_continue_s_tids (), 198 m_continue_S_tids (), 199 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 200 m_max_memory_size (512), 201 m_addr_to_mmap_size (), 202 m_thread_create_bp_sp (), 203 m_waiting_for_attach (false), 204 m_destroy_tried_resuming (false), 205 m_dyld_plugin_name(), 206 m_command_sp () 207 { 208 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 209 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 210 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 211 } 212 213 //---------------------------------------------------------------------- 214 // Destructor 215 //---------------------------------------------------------------------- 216 ProcessGDBRemote::~ProcessGDBRemote() 217 { 218 // m_mach_process.UnregisterNotificationCallbacks (this); 219 Clear(); 220 // We need to call finalize on the process before destroying ourselves 221 // to make sure all of the broadcaster cleanup goes as planned. If we 222 // destruct this class, then Process::~Process() might have problems 223 // trying to fully destroy the broadcaster. 224 Finalize(); 225 226 // The general Finalize is going to try to destroy the process and that SHOULD 227 // shut down the async thread. However, if we don't kill it it will get stranded and 228 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 229 StopAsyncThread(); 230 KillDebugserverProcess(); 231 } 232 233 //---------------------------------------------------------------------- 234 // PluginInterface 235 //---------------------------------------------------------------------- 236 const char * 237 ProcessGDBRemote::GetPluginName() 238 { 239 return "Process debugging plug-in that uses the GDB remote protocol"; 240 } 241 242 const char * 243 ProcessGDBRemote::GetShortPluginName() 244 { 245 return GetPluginNameStatic(); 246 } 247 248 uint32_t 249 ProcessGDBRemote::GetPluginVersion() 250 { 251 return 1; 252 } 253 254 void 255 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 256 { 257 if (!force && m_register_info.GetNumRegisters() > 0) 258 return; 259 260 char packet[128]; 261 m_register_info.Clear(); 262 uint32_t reg_offset = 0; 263 uint32_t reg_num = 0; 264 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 265 response_type == StringExtractorGDBRemote::eResponse; 266 ++reg_num) 267 { 268 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 269 assert (packet_len < sizeof(packet)); 270 StringExtractorGDBRemote response; 271 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 272 { 273 response_type = response.GetResponseType(); 274 if (response_type == StringExtractorGDBRemote::eResponse) 275 { 276 std::string name; 277 std::string value; 278 ConstString reg_name; 279 ConstString alt_name; 280 ConstString set_name; 281 std::vector<uint32_t> value_regs; 282 std::vector<uint32_t> invalidate_regs; 283 RegisterInfo reg_info = { NULL, // Name 284 NULL, // Alt name 285 0, // byte size 286 reg_offset, // offset 287 eEncodingUint, // encoding 288 eFormatHex, // formate 289 { 290 LLDB_INVALID_REGNUM, // GCC reg num 291 LLDB_INVALID_REGNUM, // DWARF reg num 292 LLDB_INVALID_REGNUM, // generic reg num 293 reg_num, // GDB reg num 294 reg_num // native register number 295 }, 296 NULL, 297 NULL 298 }; 299 300 while (response.GetNameColonValue(name, value)) 301 { 302 if (name.compare("name") == 0) 303 { 304 reg_name.SetCString(value.c_str()); 305 } 306 else if (name.compare("alt-name") == 0) 307 { 308 alt_name.SetCString(value.c_str()); 309 } 310 else if (name.compare("bitsize") == 0) 311 { 312 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 313 } 314 else if (name.compare("offset") == 0) 315 { 316 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 317 if (reg_offset != offset) 318 { 319 reg_offset = offset; 320 } 321 } 322 else if (name.compare("encoding") == 0) 323 { 324 const Encoding encoding = Args::StringToEncoding (value.c_str()); 325 if (encoding != eEncodingInvalid) 326 reg_info.encoding = encoding; 327 } 328 else if (name.compare("format") == 0) 329 { 330 Format format = eFormatInvalid; 331 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 332 reg_info.format = format; 333 else if (value.compare("binary") == 0) 334 reg_info.format = eFormatBinary; 335 else if (value.compare("decimal") == 0) 336 reg_info.format = eFormatDecimal; 337 else if (value.compare("hex") == 0) 338 reg_info.format = eFormatHex; 339 else if (value.compare("float") == 0) 340 reg_info.format = eFormatFloat; 341 else if (value.compare("vector-sint8") == 0) 342 reg_info.format = eFormatVectorOfSInt8; 343 else if (value.compare("vector-uint8") == 0) 344 reg_info.format = eFormatVectorOfUInt8; 345 else if (value.compare("vector-sint16") == 0) 346 reg_info.format = eFormatVectorOfSInt16; 347 else if (value.compare("vector-uint16") == 0) 348 reg_info.format = eFormatVectorOfUInt16; 349 else if (value.compare("vector-sint32") == 0) 350 reg_info.format = eFormatVectorOfSInt32; 351 else if (value.compare("vector-uint32") == 0) 352 reg_info.format = eFormatVectorOfUInt32; 353 else if (value.compare("vector-float32") == 0) 354 reg_info.format = eFormatVectorOfFloat32; 355 else if (value.compare("vector-uint128") == 0) 356 reg_info.format = eFormatVectorOfUInt128; 357 } 358 else if (name.compare("set") == 0) 359 { 360 set_name.SetCString(value.c_str()); 361 } 362 else if (name.compare("gcc") == 0) 363 { 364 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 365 } 366 else if (name.compare("dwarf") == 0) 367 { 368 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 369 } 370 else if (name.compare("generic") == 0) 371 { 372 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 373 } 374 else if (name.compare("container-regs") == 0) 375 { 376 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 377 value_pair.second = value; 378 do 379 { 380 value_pair = value_pair.second.split(','); 381 if (!value_pair.first.empty()) 382 { 383 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 384 if (reg != LLDB_INVALID_REGNUM) 385 value_regs.push_back (reg); 386 } 387 } while (!value_pair.second.empty()); 388 } 389 else if (name.compare("invalidate-regs") == 0) 390 { 391 std::pair<llvm::StringRef, llvm::StringRef> value_pair; 392 value_pair.second = value; 393 do 394 { 395 value_pair = value_pair.second.split(','); 396 if (!value_pair.first.empty()) 397 { 398 uint32_t reg = Args::StringToUInt32 (value_pair.first.str().c_str(), LLDB_INVALID_REGNUM, 16); 399 if (reg != LLDB_INVALID_REGNUM) 400 invalidate_regs.push_back (reg); 401 } 402 } while (!value_pair.second.empty()); 403 } 404 } 405 406 reg_info.byte_offset = reg_offset; 407 assert (reg_info.byte_size != 0); 408 reg_offset += reg_info.byte_size; 409 if (!value_regs.empty()) 410 { 411 value_regs.push_back(LLDB_INVALID_REGNUM); 412 reg_info.value_regs = value_regs.data(); 413 } 414 if (!invalidate_regs.empty()) 415 { 416 invalidate_regs.push_back(LLDB_INVALID_REGNUM); 417 reg_info.invalidate_regs = invalidate_regs.data(); 418 } 419 420 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 421 } 422 } 423 else 424 { 425 break; 426 } 427 } 428 429 // We didn't get anything if the accumulated reg_num is zero. See if we are 430 // debugging ARM and fill with a hard coded register set until we can get an 431 // updated debugserver down on the devices. 432 // On the other hand, if the accumulated reg_num is positive, see if we can 433 // add composite registers to the existing primordial ones. 434 bool from_scratch = (reg_num == 0); 435 436 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 437 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 438 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 439 440 // Use the process' architecture instead of the host arch, if available 441 ArchSpec remote_arch; 442 if (remote_process_arch.IsValid ()) 443 remote_arch = remote_process_arch; 444 else 445 remote_arch = remote_host_arch; 446 447 if (!target_arch.IsValid()) 448 { 449 if (remote_arch.IsValid() 450 && remote_arch.GetMachine() == llvm::Triple::arm 451 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 452 m_register_info.HardcodeARMRegisters(from_scratch); 453 } 454 else if (target_arch.GetMachine() == llvm::Triple::arm) 455 { 456 m_register_info.HardcodeARMRegisters(from_scratch); 457 } 458 459 // At this point, we can finalize our register info. 460 m_register_info.Finalize (); 461 } 462 463 Error 464 ProcessGDBRemote::WillLaunch (Module* module) 465 { 466 return WillLaunchOrAttach (); 467 } 468 469 Error 470 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 471 { 472 return WillLaunchOrAttach (); 473 } 474 475 Error 476 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 477 { 478 return WillLaunchOrAttach (); 479 } 480 481 Error 482 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 483 { 484 Error error (WillLaunchOrAttach ()); 485 486 if (error.Fail()) 487 return error; 488 489 error = ConnectToDebugserver (remote_url); 490 491 if (error.Fail()) 492 return error; 493 StartAsyncThread (); 494 495 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 496 if (pid == LLDB_INVALID_PROCESS_ID) 497 { 498 // We don't have a valid process ID, so note that we are connected 499 // and could now request to launch or attach, or get remote process 500 // listings... 501 SetPrivateState (eStateConnected); 502 } 503 else 504 { 505 // We have a valid process 506 SetID (pid); 507 GetThreadList(); 508 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 509 { 510 const StateType state = SetThreadStopInfo (m_last_stop_packet); 511 if (state == eStateStopped) 512 { 513 SetPrivateState (state); 514 } 515 else 516 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 517 } 518 else 519 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 520 } 521 522 if (error.Success() 523 && !GetTarget().GetArchitecture().IsValid() 524 && m_gdb_comm.GetHostArchitecture().IsValid()) 525 { 526 // Prefer the *process'* architecture over that of the *host*, if available. 527 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 528 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 529 else 530 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 531 } 532 533 return error; 534 } 535 536 Error 537 ProcessGDBRemote::WillLaunchOrAttach () 538 { 539 Error error; 540 m_stdio_communication.Clear (); 541 return error; 542 } 543 544 //---------------------------------------------------------------------- 545 // Process Control 546 //---------------------------------------------------------------------- 547 Error 548 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 549 { 550 Error error; 551 552 uint32_t launch_flags = launch_info.GetFlags().Get(); 553 const char *stdin_path = NULL; 554 const char *stdout_path = NULL; 555 const char *stderr_path = NULL; 556 const char *working_dir = launch_info.GetWorkingDirectory(); 557 558 const ProcessLaunchInfo::FileAction *file_action; 559 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 560 if (file_action) 561 { 562 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 563 stdin_path = file_action->GetPath(); 564 } 565 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 566 if (file_action) 567 { 568 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 569 stdout_path = file_action->GetPath(); 570 } 571 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 572 if (file_action) 573 { 574 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 575 stderr_path = file_action->GetPath(); 576 } 577 578 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 579 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 580 // ::LogSetLogFile ("/dev/stdout"); 581 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 582 583 ObjectFile * object_file = exe_module->GetObjectFile(); 584 if (object_file) 585 { 586 char host_port[128]; 587 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 588 char connect_url[128]; 589 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 590 591 // Make sure we aren't already connected? 592 if (!m_gdb_comm.IsConnected()) 593 { 594 error = StartDebugserverProcess (host_port, launch_info); 595 if (error.Fail()) 596 { 597 if (log) 598 log->Printf("failed to start debugserver process: %s", error.AsCString()); 599 return error; 600 } 601 602 error = ConnectToDebugserver (connect_url); 603 } 604 605 if (error.Success()) 606 { 607 lldb_utility::PseudoTerminal pty; 608 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 609 610 // If the debugserver is local and we aren't disabling STDIO, lets use 611 // a pseudo terminal to instead of relying on the 'O' packets for stdio 612 // since 'O' packets can really slow down debugging if the inferior 613 // does a lot of output. 614 PlatformSP platform_sp (m_target.GetPlatform()); 615 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 616 { 617 const char *slave_name = NULL; 618 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 619 { 620 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 621 slave_name = pty.GetSlaveName (NULL, 0); 622 } 623 if (stdin_path == NULL) 624 stdin_path = slave_name; 625 626 if (stdout_path == NULL) 627 stdout_path = slave_name; 628 629 if (stderr_path == NULL) 630 stderr_path = slave_name; 631 } 632 633 // Set STDIN to /dev/null if we want STDIO disabled or if either 634 // STDOUT or STDERR have been set to something and STDIN hasn't 635 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 636 stdin_path = "/dev/null"; 637 638 // Set STDOUT to /dev/null if we want STDIO disabled or if either 639 // STDIN or STDERR have been set to something and STDOUT hasn't 640 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 641 stdout_path = "/dev/null"; 642 643 // Set STDERR to /dev/null if we want STDIO disabled or if either 644 // STDIN or STDOUT have been set to something and STDERR hasn't 645 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 646 stderr_path = "/dev/null"; 647 648 if (stdin_path) 649 m_gdb_comm.SetSTDIN (stdin_path); 650 if (stdout_path) 651 m_gdb_comm.SetSTDOUT (stdout_path); 652 if (stderr_path) 653 m_gdb_comm.SetSTDERR (stderr_path); 654 655 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 656 657 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 658 659 if (working_dir && working_dir[0]) 660 { 661 m_gdb_comm.SetWorkingDir (working_dir); 662 } 663 664 // Send the environment and the program + arguments after we connect 665 const Args &environment = launch_info.GetEnvironmentEntries(); 666 if (environment.GetArgumentCount()) 667 { 668 size_t num_environment_entries = environment.GetArgumentCount(); 669 for (size_t i=0; i<num_environment_entries; ++i) 670 { 671 const char *env_entry = environment.GetArgumentAtIndex(i); 672 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 673 break; 674 } 675 } 676 677 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 678 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 679 if (arg_packet_err == 0) 680 { 681 std::string error_str; 682 if (m_gdb_comm.GetLaunchSuccess (error_str)) 683 { 684 SetID (m_gdb_comm.GetCurrentProcessID ()); 685 } 686 else 687 { 688 error.SetErrorString (error_str.c_str()); 689 } 690 } 691 else 692 { 693 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 694 } 695 696 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 697 698 if (GetID() == LLDB_INVALID_PROCESS_ID) 699 { 700 if (log) 701 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 702 KillDebugserverProcess (); 703 return error; 704 } 705 706 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 707 { 708 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 709 710 if (!disable_stdio) 711 { 712 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 713 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 714 } 715 } 716 } 717 else 718 { 719 if (log) 720 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 721 } 722 } 723 else 724 { 725 // Set our user ID to an invalid process ID. 726 SetID(LLDB_INVALID_PROCESS_ID); 727 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 728 exe_module->GetFileSpec().GetFilename().AsCString(), 729 exe_module->GetArchitecture().GetArchitectureName()); 730 } 731 return error; 732 733 } 734 735 736 Error 737 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 738 { 739 Error error; 740 // Sleep and wait a bit for debugserver to start to listen... 741 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 742 if (conn_ap.get()) 743 { 744 const uint32_t max_retry_count = 50; 745 uint32_t retry_count = 0; 746 while (!m_gdb_comm.IsConnected()) 747 { 748 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 749 { 750 m_gdb_comm.SetConnection (conn_ap.release()); 751 break; 752 } 753 retry_count++; 754 755 if (retry_count >= max_retry_count) 756 break; 757 758 usleep (100000); 759 } 760 } 761 762 if (!m_gdb_comm.IsConnected()) 763 { 764 if (error.Success()) 765 error.SetErrorString("not connected to remote gdb server"); 766 return error; 767 } 768 769 // We always seem to be able to open a connection to a local port 770 // so we need to make sure we can then send data to it. If we can't 771 // then we aren't actually connected to anything, so try and do the 772 // handshake with the remote GDB server and make sure that goes 773 // alright. 774 if (!m_gdb_comm.HandshakeWithServer (NULL)) 775 { 776 m_gdb_comm.Disconnect(); 777 if (error.Success()) 778 error.SetErrorString("not connected to remote gdb server"); 779 return error; 780 } 781 m_gdb_comm.ResetDiscoverableSettings(); 782 m_gdb_comm.QueryNoAckModeSupported (); 783 m_gdb_comm.GetThreadSuffixSupported (); 784 m_gdb_comm.GetListThreadsInStopReplySupported (); 785 m_gdb_comm.GetHostInfo (); 786 m_gdb_comm.GetVContSupported ('c'); 787 m_gdb_comm.GetVAttachOrWaitSupported(); 788 789 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 790 for (size_t idx = 0; idx < num_cmds; idx++) 791 { 792 StringExtractorGDBRemote response; 793 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 794 } 795 return error; 796 } 797 798 void 799 ProcessGDBRemote::DidLaunchOrAttach () 800 { 801 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 802 if (log) 803 log->Printf ("ProcessGDBRemote::DidLaunch()"); 804 if (GetID() != LLDB_INVALID_PROCESS_ID) 805 { 806 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 807 808 BuildDynamicRegisterInfo (false); 809 810 // See if the GDB server supports the qHostInfo information 811 812 ArchSpec gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 813 814 // See if the GDB server supports the qProcessInfo packet, if so 815 // prefer that over the Host information as it will be more specific 816 // to our process. 817 818 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 819 gdb_remote_arch = m_gdb_comm.GetProcessArchitecture(); 820 821 if (gdb_remote_arch.IsValid()) 822 { 823 ArchSpec &target_arch = GetTarget().GetArchitecture(); 824 825 if (target_arch.IsValid()) 826 { 827 // If the remote host is ARM and we have apple as the vendor, then 828 // ARM executables and shared libraries can have mixed ARM architectures. 829 // You can have an armv6 executable, and if the host is armv7, then the 830 // system will load the best possible architecture for all shared libraries 831 // it has, so we really need to take the remote host architecture as our 832 // defacto architecture in this case. 833 834 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 835 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 836 { 837 target_arch = gdb_remote_arch; 838 } 839 else 840 { 841 // Fill in what is missing in the triple 842 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 843 llvm::Triple &target_triple = target_arch.GetTriple(); 844 if (target_triple.getVendorName().size() == 0) 845 { 846 target_triple.setVendor (remote_triple.getVendor()); 847 848 if (target_triple.getOSName().size() == 0) 849 { 850 target_triple.setOS (remote_triple.getOS()); 851 852 if (target_triple.getEnvironmentName().size() == 0) 853 target_triple.setEnvironment (remote_triple.getEnvironment()); 854 } 855 } 856 } 857 } 858 else 859 { 860 // The target doesn't have a valid architecture yet, set it from 861 // the architecture we got from the remote GDB server 862 target_arch = gdb_remote_arch; 863 } 864 } 865 } 866 } 867 868 void 869 ProcessGDBRemote::DidLaunch () 870 { 871 DidLaunchOrAttach (); 872 } 873 874 Error 875 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 876 { 877 ProcessAttachInfo attach_info; 878 return DoAttachToProcessWithID(attach_pid, attach_info); 879 } 880 881 Error 882 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 883 { 884 Error error; 885 // Clear out and clean up from any current state 886 Clear(); 887 if (attach_pid != LLDB_INVALID_PROCESS_ID) 888 { 889 // Make sure we aren't already connected? 890 if (!m_gdb_comm.IsConnected()) 891 { 892 char host_port[128]; 893 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 894 char connect_url[128]; 895 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 896 897 error = StartDebugserverProcess (host_port, attach_info); 898 899 if (error.Fail()) 900 { 901 const char *error_string = error.AsCString(); 902 if (error_string == NULL) 903 error_string = "unable to launch " DEBUGSERVER_BASENAME; 904 905 SetExitStatus (-1, error_string); 906 } 907 else 908 { 909 error = ConnectToDebugserver (connect_url); 910 } 911 } 912 913 if (error.Success()) 914 { 915 char packet[64]; 916 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 917 SetID (attach_pid); 918 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 919 } 920 } 921 return error; 922 } 923 924 size_t 925 ProcessGDBRemote::AttachInputReaderCallback 926 ( 927 void *baton, 928 InputReader *reader, 929 lldb::InputReaderAction notification, 930 const char *bytes, 931 size_t bytes_len 932 ) 933 { 934 if (notification == eInputReaderGotToken) 935 { 936 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 937 if (gdb_process->m_waiting_for_attach) 938 gdb_process->m_waiting_for_attach = false; 939 reader->SetIsDone(true); 940 return 1; 941 } 942 return 0; 943 } 944 945 Error 946 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 947 { 948 Error error; 949 // Clear out and clean up from any current state 950 Clear(); 951 952 if (process_name && process_name[0]) 953 { 954 // Make sure we aren't already connected? 955 if (!m_gdb_comm.IsConnected()) 956 { 957 char host_port[128]; 958 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 959 char connect_url[128]; 960 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 961 962 error = StartDebugserverProcess (host_port, attach_info); 963 if (error.Fail()) 964 { 965 const char *error_string = error.AsCString(); 966 if (error_string == NULL) 967 error_string = "unable to launch " DEBUGSERVER_BASENAME; 968 969 SetExitStatus (-1, error_string); 970 } 971 else 972 { 973 error = ConnectToDebugserver (connect_url); 974 } 975 } 976 977 if (error.Success()) 978 { 979 StreamString packet; 980 981 if (wait_for_launch) 982 { 983 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 984 { 985 packet.PutCString ("vAttachWait"); 986 } 987 else 988 { 989 if (attach_info.GetIgnoreExisting()) 990 packet.PutCString("vAttachWait"); 991 else 992 packet.PutCString ("vAttachOrWait"); 993 } 994 } 995 else 996 packet.PutCString("vAttachName"); 997 packet.PutChar(';'); 998 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 999 1000 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1001 1002 } 1003 } 1004 return error; 1005 } 1006 1007 1008 void 1009 ProcessGDBRemote::DidAttach () 1010 { 1011 DidLaunchOrAttach (); 1012 } 1013 1014 void 1015 ProcessGDBRemote::DoDidExec () 1016 { 1017 // The process exec'ed itself, figure out the dynamic loader, etc... 1018 BuildDynamicRegisterInfo (true); 1019 m_gdb_comm.ResetDiscoverableSettings(); 1020 DidLaunchOrAttach (); 1021 } 1022 1023 1024 1025 Error 1026 ProcessGDBRemote::WillResume () 1027 { 1028 m_continue_c_tids.clear(); 1029 m_continue_C_tids.clear(); 1030 m_continue_s_tids.clear(); 1031 m_continue_S_tids.clear(); 1032 return Error(); 1033 } 1034 1035 Error 1036 ProcessGDBRemote::DoResume () 1037 { 1038 Error error; 1039 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1040 if (log) 1041 log->Printf ("ProcessGDBRemote::Resume()"); 1042 1043 Listener listener ("gdb-remote.resume-packet-sent"); 1044 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1045 { 1046 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1047 1048 StreamString continue_packet; 1049 bool continue_packet_error = false; 1050 if (m_gdb_comm.HasAnyVContSupport ()) 1051 { 1052 continue_packet.PutCString ("vCont"); 1053 1054 if (!m_continue_c_tids.empty()) 1055 { 1056 if (m_gdb_comm.GetVContSupported ('c')) 1057 { 1058 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) 1059 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1060 } 1061 else 1062 continue_packet_error = true; 1063 } 1064 1065 if (!continue_packet_error && !m_continue_C_tids.empty()) 1066 { 1067 if (m_gdb_comm.GetVContSupported ('C')) 1068 { 1069 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) 1070 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1071 } 1072 else 1073 continue_packet_error = true; 1074 } 1075 1076 if (!continue_packet_error && !m_continue_s_tids.empty()) 1077 { 1078 if (m_gdb_comm.GetVContSupported ('s')) 1079 { 1080 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) 1081 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1082 } 1083 else 1084 continue_packet_error = true; 1085 } 1086 1087 if (!continue_packet_error && !m_continue_S_tids.empty()) 1088 { 1089 if (m_gdb_comm.GetVContSupported ('S')) 1090 { 1091 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) 1092 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1093 } 1094 else 1095 continue_packet_error = true; 1096 } 1097 1098 if (continue_packet_error) 1099 continue_packet.GetString().clear(); 1100 } 1101 else 1102 continue_packet_error = true; 1103 1104 if (continue_packet_error) 1105 { 1106 // Either no vCont support, or we tried to use part of the vCont 1107 // packet that wasn't supported by the remote GDB server. 1108 // We need to try and make a simple packet that can do our continue 1109 const size_t num_threads = GetThreadList().GetSize(); 1110 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1111 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1112 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1113 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1114 if (num_continue_c_tids > 0) 1115 { 1116 if (num_continue_c_tids == num_threads) 1117 { 1118 // All threads are resuming... 1119 m_gdb_comm.SetCurrentThreadForRun (-1); 1120 continue_packet.PutChar ('c'); 1121 continue_packet_error = false; 1122 } 1123 else if (num_continue_c_tids == 1 && 1124 num_continue_C_tids == 0 && 1125 num_continue_s_tids == 0 && 1126 num_continue_S_tids == 0 ) 1127 { 1128 // Only one thread is continuing 1129 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1130 continue_packet.PutChar ('c'); 1131 continue_packet_error = false; 1132 } 1133 } 1134 1135 if (continue_packet_error && num_continue_C_tids > 0) 1136 { 1137 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1138 num_continue_C_tids > 0 && 1139 num_continue_s_tids == 0 && 1140 num_continue_S_tids == 0 ) 1141 { 1142 const int continue_signo = m_continue_C_tids.front().second; 1143 // Only one thread is continuing 1144 if (num_continue_C_tids > 1) 1145 { 1146 // More that one thread with a signal, yet we don't have 1147 // vCont support and we are being asked to resume each 1148 // thread with a signal, we need to make sure they are 1149 // all the same signal, or we can't issue the continue 1150 // accurately with the current support... 1151 if (num_continue_C_tids > 1) 1152 { 1153 continue_packet_error = false; 1154 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1155 { 1156 if (m_continue_C_tids[i].second != continue_signo) 1157 continue_packet_error = true; 1158 } 1159 } 1160 if (!continue_packet_error) 1161 m_gdb_comm.SetCurrentThreadForRun (-1); 1162 } 1163 else 1164 { 1165 // Set the continue thread ID 1166 continue_packet_error = false; 1167 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1168 } 1169 if (!continue_packet_error) 1170 { 1171 // Add threads continuing with the same signo... 1172 continue_packet.Printf("C%2.2x", continue_signo); 1173 } 1174 } 1175 } 1176 1177 if (continue_packet_error && num_continue_s_tids > 0) 1178 { 1179 if (num_continue_s_tids == num_threads) 1180 { 1181 // All threads are resuming... 1182 m_gdb_comm.SetCurrentThreadForRun (-1); 1183 continue_packet.PutChar ('s'); 1184 continue_packet_error = false; 1185 } 1186 else if (num_continue_c_tids == 0 && 1187 num_continue_C_tids == 0 && 1188 num_continue_s_tids == 1 && 1189 num_continue_S_tids == 0 ) 1190 { 1191 // Only one thread is stepping 1192 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1193 continue_packet.PutChar ('s'); 1194 continue_packet_error = false; 1195 } 1196 } 1197 1198 if (!continue_packet_error && num_continue_S_tids > 0) 1199 { 1200 if (num_continue_S_tids == num_threads) 1201 { 1202 const int step_signo = m_continue_S_tids.front().second; 1203 // Are all threads trying to step with the same signal? 1204 continue_packet_error = false; 1205 if (num_continue_S_tids > 1) 1206 { 1207 for (size_t i=1; i<num_threads; ++i) 1208 { 1209 if (m_continue_S_tids[i].second != step_signo) 1210 continue_packet_error = true; 1211 } 1212 } 1213 if (!continue_packet_error) 1214 { 1215 // Add threads stepping with the same signo... 1216 m_gdb_comm.SetCurrentThreadForRun (-1); 1217 continue_packet.Printf("S%2.2x", step_signo); 1218 } 1219 } 1220 else if (num_continue_c_tids == 0 && 1221 num_continue_C_tids == 0 && 1222 num_continue_s_tids == 0 && 1223 num_continue_S_tids == 1 ) 1224 { 1225 // Only one thread is stepping with signal 1226 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1227 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1228 continue_packet_error = false; 1229 } 1230 } 1231 } 1232 1233 if (continue_packet_error) 1234 { 1235 error.SetErrorString ("can't make continue packet for this resume"); 1236 } 1237 else 1238 { 1239 EventSP event_sp; 1240 TimeValue timeout; 1241 timeout = TimeValue::Now(); 1242 timeout.OffsetWithSeconds (5); 1243 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1244 { 1245 error.SetErrorString ("Trying to resume but the async thread is dead."); 1246 if (log) 1247 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1248 return error; 1249 } 1250 1251 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1252 1253 if (listener.WaitForEvent (&timeout, event_sp) == false) 1254 { 1255 error.SetErrorString("Resume timed out."); 1256 if (log) 1257 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1258 } 1259 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1260 { 1261 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1262 if (log) 1263 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1264 return error; 1265 } 1266 } 1267 } 1268 1269 return error; 1270 } 1271 1272 void 1273 ProcessGDBRemote::ClearThreadIDList () 1274 { 1275 Mutex::Locker locker(m_thread_list.GetMutex()); 1276 m_thread_ids.clear(); 1277 } 1278 1279 bool 1280 ProcessGDBRemote::UpdateThreadIDList () 1281 { 1282 Mutex::Locker locker(m_thread_list.GetMutex()); 1283 bool sequence_mutex_unavailable = false; 1284 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1285 if (sequence_mutex_unavailable) 1286 { 1287 return false; // We just didn't get the list 1288 } 1289 return true; 1290 } 1291 1292 bool 1293 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1294 { 1295 // locker will keep a mutex locked until it goes out of scope 1296 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1297 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1298 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1299 1300 size_t num_thread_ids = m_thread_ids.size(); 1301 // The "m_thread_ids" thread ID list should always be updated after each stop 1302 // reply packet, but in case it isn't, update it here. 1303 if (num_thread_ids == 0) 1304 { 1305 if (!UpdateThreadIDList ()) 1306 return false; 1307 num_thread_ids = m_thread_ids.size(); 1308 } 1309 1310 ThreadList old_thread_list_copy(old_thread_list); 1311 if (num_thread_ids > 0) 1312 { 1313 for (size_t i=0; i<num_thread_ids; ++i) 1314 { 1315 tid_t tid = m_thread_ids[i]; 1316 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByID (tid, false)); 1317 if (!thread_sp) 1318 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1319 new_thread_list.AddThread(thread_sp); 1320 } 1321 } 1322 1323 // Whatever that is left in old_thread_list_copy are not 1324 // present in new_thread_list. Remove non-existent threads from internal id table. 1325 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1326 for (size_t i=0; i<old_num_thread_ids; i++) 1327 { 1328 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1329 if (old_thread_sp) 1330 { 1331 lldb::tid_t old_thread_id = old_thread_sp->GetID(); 1332 m_thread_id_to_index_id_map.erase(old_thread_id); 1333 } 1334 } 1335 1336 return true; 1337 } 1338 1339 1340 StateType 1341 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1342 { 1343 stop_packet.SetFilePos (0); 1344 const char stop_type = stop_packet.GetChar(); 1345 switch (stop_type) 1346 { 1347 case 'T': 1348 case 'S': 1349 { 1350 if (GetStopID() == 0) 1351 { 1352 // Our first stop, make sure we have a process ID, and also make 1353 // sure we know about our registers 1354 if (GetID() == LLDB_INVALID_PROCESS_ID) 1355 { 1356 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1357 if (pid != LLDB_INVALID_PROCESS_ID) 1358 SetID (pid); 1359 } 1360 BuildDynamicRegisterInfo (true); 1361 } 1362 // Stop with signal and thread info 1363 const uint8_t signo = stop_packet.GetHexU8(); 1364 std::string name; 1365 std::string value; 1366 std::string thread_name; 1367 std::string reason; 1368 std::string description; 1369 uint32_t exc_type = 0; 1370 std::vector<addr_t> exc_data; 1371 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1372 ThreadSP thread_sp; 1373 1374 while (stop_packet.GetNameColonValue(name, value)) 1375 { 1376 if (name.compare("metype") == 0) 1377 { 1378 // exception type in big endian hex 1379 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1380 } 1381 else if (name.compare("medata") == 0) 1382 { 1383 // exception data in big endian hex 1384 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1385 } 1386 else if (name.compare("thread") == 0) 1387 { 1388 // thread in big endian hex 1389 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1390 // m_thread_list does have its own mutex, but we need to 1391 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1392 // and the m_thread_list.AddThread(...) so it doesn't change on us 1393 Mutex::Locker locker (m_thread_list.GetMutex ()); 1394 thread_sp = m_thread_list.FindThreadByID(tid, false); 1395 if (!thread_sp) 1396 { 1397 // Create the thread if we need to 1398 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1399 m_thread_list.AddThread(thread_sp); 1400 } 1401 } 1402 else if (name.compare("threads") == 0) 1403 { 1404 Mutex::Locker locker(m_thread_list.GetMutex()); 1405 m_thread_ids.clear(); 1406 // A comma separated list of all threads in the current 1407 // process that includes the thread for this stop reply 1408 // packet 1409 size_t comma_pos; 1410 lldb::tid_t tid; 1411 while ((comma_pos = value.find(',')) != std::string::npos) 1412 { 1413 value[comma_pos] = '\0'; 1414 // thread in big endian hex 1415 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1416 if (tid != LLDB_INVALID_THREAD_ID) 1417 m_thread_ids.push_back (tid); 1418 value.erase(0, comma_pos + 1); 1419 1420 } 1421 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1422 if (tid != LLDB_INVALID_THREAD_ID) 1423 m_thread_ids.push_back (tid); 1424 } 1425 else if (name.compare("hexname") == 0) 1426 { 1427 StringExtractor name_extractor; 1428 // Swap "value" over into "name_extractor" 1429 name_extractor.GetStringRef().swap(value); 1430 // Now convert the HEX bytes into a string value 1431 name_extractor.GetHexByteString (value); 1432 thread_name.swap (value); 1433 } 1434 else if (name.compare("name") == 0) 1435 { 1436 thread_name.swap (value); 1437 } 1438 else if (name.compare("qaddr") == 0) 1439 { 1440 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1441 } 1442 else if (name.compare("reason") == 0) 1443 { 1444 reason.swap(value); 1445 } 1446 else if (name.compare("description") == 0) 1447 { 1448 StringExtractor desc_extractor; 1449 // Swap "value" over into "name_extractor" 1450 desc_extractor.GetStringRef().swap(value); 1451 // Now convert the HEX bytes into a string value 1452 desc_extractor.GetHexByteString (thread_name); 1453 } 1454 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1455 { 1456 // We have a register number that contains an expedited 1457 // register value. Lets supply this register to our thread 1458 // so it won't have to go and read it. 1459 if (thread_sp) 1460 { 1461 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1462 1463 if (reg != UINT32_MAX) 1464 { 1465 StringExtractor reg_value_extractor; 1466 // Swap "value" over into "reg_value_extractor" 1467 reg_value_extractor.GetStringRef().swap(value); 1468 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1469 { 1470 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1471 name.c_str(), 1472 reg, 1473 reg, 1474 reg_value_extractor.GetStringRef().c_str(), 1475 stop_packet.GetStringRef().c_str()); 1476 } 1477 } 1478 } 1479 } 1480 } 1481 1482 if (thread_sp) 1483 { 1484 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1485 1486 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1487 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1488 if (exc_type != 0) 1489 { 1490 const size_t exc_data_size = exc_data.size(); 1491 1492 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1493 exc_type, 1494 exc_data_size, 1495 exc_data_size >= 1 ? exc_data[0] : 0, 1496 exc_data_size >= 2 ? exc_data[1] : 0, 1497 exc_data_size >= 3 ? exc_data[2] : 0)); 1498 } 1499 else 1500 { 1501 bool handled = false; 1502 if (!reason.empty()) 1503 { 1504 if (reason.compare("trace") == 0) 1505 { 1506 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1507 handled = true; 1508 } 1509 else if (reason.compare("breakpoint") == 0) 1510 { 1511 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1512 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1513 if (bp_site_sp) 1514 { 1515 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1516 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1517 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1518 handled = true; 1519 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1520 { 1521 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1522 } 1523 else 1524 { 1525 StopInfoSP invalid_stop_info_sp; 1526 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1527 } 1528 } 1529 1530 } 1531 else if (reason.compare("trap") == 0) 1532 { 1533 // Let the trap just use the standard signal stop reason below... 1534 } 1535 else if (reason.compare("watchpoint") == 0) 1536 { 1537 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1538 // TODO: locate the watchpoint somehow... 1539 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1540 handled = true; 1541 } 1542 else if (reason.compare("exception") == 0) 1543 { 1544 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1545 handled = true; 1546 } 1547 } 1548 1549 if (signo) 1550 { 1551 if (signo == SIGTRAP) 1552 { 1553 // Currently we are going to assume SIGTRAP means we are either 1554 // hitting a breakpoint or hardware single stepping. 1555 handled = true; 1556 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1557 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1558 1559 if (bp_site_sp) 1560 { 1561 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1562 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1563 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1564 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1565 { 1566 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1567 } 1568 else 1569 { 1570 StopInfoSP invalid_stop_info_sp; 1571 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1572 } 1573 } 1574 else 1575 { 1576 // If we were stepping then assume the stop was the result of the trace. If we were 1577 // not stepping then report the SIGTRAP. 1578 // FIXME: We are still missing the case where we single step over a trap instruction. 1579 if (gdb_thread->GetTemporaryResumeState() == eStateStepping) 1580 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1581 else 1582 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1583 } 1584 } 1585 if (!handled) 1586 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1587 } 1588 else 1589 { 1590 StopInfoSP invalid_stop_info_sp; 1591 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1592 } 1593 1594 if (!description.empty()) 1595 { 1596 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1597 if (stop_info_sp) 1598 { 1599 stop_info_sp->SetDescription (description.c_str()); 1600 } 1601 else 1602 { 1603 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1604 } 1605 } 1606 } 1607 } 1608 return eStateStopped; 1609 } 1610 break; 1611 1612 case 'W': 1613 // process exited 1614 return eStateExited; 1615 1616 default: 1617 break; 1618 } 1619 return eStateInvalid; 1620 } 1621 1622 void 1623 ProcessGDBRemote::RefreshStateAfterStop () 1624 { 1625 Mutex::Locker locker(m_thread_list.GetMutex()); 1626 m_thread_ids.clear(); 1627 // Set the thread stop info. It might have a "threads" key whose value is 1628 // a list of all thread IDs in the current process, so m_thread_ids might 1629 // get set. 1630 SetThreadStopInfo (m_last_stop_packet); 1631 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1632 if (m_thread_ids.empty()) 1633 { 1634 // No, we need to fetch the thread list manually 1635 UpdateThreadIDList(); 1636 } 1637 1638 // Let all threads recover from stopping and do any clean up based 1639 // on the previous thread state (if any). 1640 m_thread_list.RefreshStateAfterStop(); 1641 1642 } 1643 1644 Error 1645 ProcessGDBRemote::DoHalt (bool &caused_stop) 1646 { 1647 Error error; 1648 1649 bool timed_out = false; 1650 Mutex::Locker locker; 1651 1652 if (m_public_state.GetValue() == eStateAttaching) 1653 { 1654 // We are being asked to halt during an attach. We need to just close 1655 // our file handle and debugserver will go away, and we can be done... 1656 m_gdb_comm.Disconnect(); 1657 } 1658 else 1659 { 1660 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1661 { 1662 if (timed_out) 1663 error.SetErrorString("timed out sending interrupt packet"); 1664 else 1665 error.SetErrorString("unknown error sending interrupt packet"); 1666 } 1667 1668 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1669 } 1670 return error; 1671 } 1672 1673 Error 1674 ProcessGDBRemote::InterruptIfRunning 1675 ( 1676 bool discard_thread_plans, 1677 bool catch_stop_event, 1678 EventSP &stop_event_sp 1679 ) 1680 { 1681 Error error; 1682 1683 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1684 1685 bool paused_private_state_thread = false; 1686 const bool is_running = m_gdb_comm.IsRunning(); 1687 if (log) 1688 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1689 discard_thread_plans, 1690 catch_stop_event, 1691 is_running); 1692 1693 if (discard_thread_plans) 1694 { 1695 if (log) 1696 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1697 m_thread_list.DiscardThreadPlans(); 1698 } 1699 if (is_running) 1700 { 1701 if (catch_stop_event) 1702 { 1703 if (log) 1704 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1705 PausePrivateStateThread(); 1706 paused_private_state_thread = true; 1707 } 1708 1709 bool timed_out = false; 1710 Mutex::Locker locker; 1711 1712 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1713 { 1714 if (timed_out) 1715 error.SetErrorString("timed out sending interrupt packet"); 1716 else 1717 error.SetErrorString("unknown error sending interrupt packet"); 1718 if (paused_private_state_thread) 1719 ResumePrivateStateThread(); 1720 return error; 1721 } 1722 1723 if (catch_stop_event) 1724 { 1725 // LISTEN HERE 1726 TimeValue timeout_time; 1727 timeout_time = TimeValue::Now(); 1728 timeout_time.OffsetWithSeconds(5); 1729 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1730 1731 timed_out = state == eStateInvalid; 1732 if (log) 1733 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1734 1735 if (timed_out) 1736 error.SetErrorString("unable to verify target stopped"); 1737 } 1738 1739 if (paused_private_state_thread) 1740 { 1741 if (log) 1742 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1743 ResumePrivateStateThread(); 1744 } 1745 } 1746 return error; 1747 } 1748 1749 Error 1750 ProcessGDBRemote::WillDetach () 1751 { 1752 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1753 if (log) 1754 log->Printf ("ProcessGDBRemote::WillDetach()"); 1755 1756 bool discard_thread_plans = true; 1757 bool catch_stop_event = true; 1758 EventSP event_sp; 1759 1760 // FIXME: InterruptIfRunning should be done in the Process base class, or better still make Halt do what is 1761 // needed. This shouldn't be a feature of a particular plugin. 1762 1763 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1764 } 1765 1766 Error 1767 ProcessGDBRemote::DoDetach() 1768 { 1769 Error error; 1770 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1771 if (log) 1772 log->Printf ("ProcessGDBRemote::DoDetach()"); 1773 1774 DisableAllBreakpointSites (); 1775 1776 m_thread_list.DiscardThreadPlans(); 1777 1778 bool success = m_gdb_comm.Detach (); 1779 if (log) 1780 { 1781 if (success) 1782 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1783 else 1784 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1785 } 1786 // Sleep for one second to let the process get all detached... 1787 StopAsyncThread (); 1788 1789 SetPrivateState (eStateDetached); 1790 ResumePrivateStateThread(); 1791 1792 //KillDebugserverProcess (); 1793 return error; 1794 } 1795 1796 1797 Error 1798 ProcessGDBRemote::DoDestroy () 1799 { 1800 Error error; 1801 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1802 if (log) 1803 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1804 1805 // There is a bug in older iOS debugservers where they don't shut down the process 1806 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1807 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1808 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1809 // destroy it again. 1810 // 1811 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1812 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1813 // the debugservers with this bug are equal. There really should be a better way to test this! 1814 // 1815 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1816 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1817 // just do the straight-forward kill. 1818 // 1819 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1820 // necessary (or helpful) to do any of this. 1821 1822 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1823 { 1824 PlatformSP platform_sp = GetTarget().GetPlatform(); 1825 1826 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1827 if (platform_sp 1828 && platform_sp->GetName() 1829 && strcmp (platform_sp->GetName(), PlatformRemoteiOS::GetShortPluginNameStatic()) == 0) 1830 { 1831 if (m_destroy_tried_resuming) 1832 { 1833 if (log) 1834 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1835 } 1836 else 1837 { 1838 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1839 // but we really need it to happen here and it doesn't matter if we do it twice. 1840 m_thread_list.DiscardThreadPlans(); 1841 DisableAllBreakpointSites(); 1842 1843 bool stop_looks_like_crash = false; 1844 ThreadList &threads = GetThreadList(); 1845 1846 { 1847 Mutex::Locker locker(threads.GetMutex()); 1848 1849 size_t num_threads = threads.GetSize(); 1850 for (size_t i = 0; i < num_threads; i++) 1851 { 1852 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1853 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1854 StopReason reason = eStopReasonInvalid; 1855 if (stop_info_sp) 1856 reason = stop_info_sp->GetStopReason(); 1857 if (reason == eStopReasonBreakpoint 1858 || reason == eStopReasonException) 1859 { 1860 if (log) 1861 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: %" PRId64 " stopped with reason: %s.", 1862 thread_sp->GetID(), 1863 stop_info_sp->GetDescription()); 1864 stop_looks_like_crash = true; 1865 break; 1866 } 1867 } 1868 } 1869 1870 if (stop_looks_like_crash) 1871 { 1872 if (log) 1873 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1874 m_destroy_tried_resuming = true; 1875 1876 // If we are going to run again before killing, it would be good to suspend all the threads 1877 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1878 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1879 // have to run the risk of letting those threads proceed a bit. 1880 1881 { 1882 Mutex::Locker locker(threads.GetMutex()); 1883 1884 size_t num_threads = threads.GetSize(); 1885 for (size_t i = 0; i < num_threads; i++) 1886 { 1887 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1888 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1889 StopReason reason = eStopReasonInvalid; 1890 if (stop_info_sp) 1891 reason = stop_info_sp->GetStopReason(); 1892 if (reason != eStopReasonBreakpoint 1893 && reason != eStopReasonException) 1894 { 1895 if (log) 1896 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: %" PRId64 " before running.", 1897 thread_sp->GetID()); 1898 thread_sp->SetResumeState(eStateSuspended); 1899 } 1900 } 1901 } 1902 Resume (); 1903 return Destroy(); 1904 } 1905 } 1906 } 1907 } 1908 1909 // Interrupt if our inferior is running... 1910 int exit_status = SIGABRT; 1911 std::string exit_string; 1912 1913 if (m_gdb_comm.IsConnected()) 1914 { 1915 if (m_public_state.GetValue() != eStateAttaching) 1916 { 1917 1918 StringExtractorGDBRemote response; 1919 bool send_async = true; 1920 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 1921 1922 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1923 { 1924 char packet_cmd = response.GetChar(0); 1925 1926 if (packet_cmd == 'W' || packet_cmd == 'X') 1927 { 1928 SetLastStopPacket (response); 1929 ClearThreadIDList (); 1930 exit_status = response.GetHexU8(); 1931 } 1932 else 1933 { 1934 if (log) 1935 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 1936 exit_string.assign("got unexpected response to k packet: "); 1937 exit_string.append(response.GetStringRef()); 1938 } 1939 } 1940 else 1941 { 1942 if (log) 1943 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1944 exit_string.assign("failed to send the k packet"); 1945 } 1946 1947 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 1948 } 1949 else 1950 { 1951 if (log) 1952 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1953 exit_string.assign ("killed or interrupted while attaching."); 1954 } 1955 } 1956 else 1957 { 1958 // If we missed setting the exit status on the way out, do it here. 1959 // NB set exit status can be called multiple times, the first one sets the status. 1960 exit_string.assign("destroying when not connected to debugserver"); 1961 } 1962 1963 SetExitStatus(exit_status, exit_string.c_str()); 1964 1965 StopAsyncThread (); 1966 KillDebugserverProcess (); 1967 return error; 1968 } 1969 1970 //------------------------------------------------------------------ 1971 // Process Queries 1972 //------------------------------------------------------------------ 1973 1974 bool 1975 ProcessGDBRemote::IsAlive () 1976 { 1977 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1978 } 1979 1980 addr_t 1981 ProcessGDBRemote::GetImageInfoAddress() 1982 { 1983 return m_gdb_comm.GetShlibInfoAddr(); 1984 } 1985 1986 //------------------------------------------------------------------ 1987 // Process Memory 1988 //------------------------------------------------------------------ 1989 size_t 1990 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1991 { 1992 if (size > m_max_memory_size) 1993 { 1994 // Keep memory read sizes down to a sane limit. This function will be 1995 // called multiple times in order to complete the task by 1996 // lldb_private::Process so it is ok to do this. 1997 size = m_max_memory_size; 1998 } 1999 2000 char packet[64]; 2001 const int packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2002 assert (packet_len + 1 < sizeof(packet)); 2003 StringExtractorGDBRemote response; 2004 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 2005 { 2006 if (response.IsNormalResponse()) 2007 { 2008 error.Clear(); 2009 return response.GetHexBytes(buf, size, '\xdd'); 2010 } 2011 else if (response.IsErrorResponse()) 2012 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2013 else if (response.IsUnsupportedResponse()) 2014 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2015 else 2016 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2017 } 2018 else 2019 { 2020 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 2021 } 2022 return 0; 2023 } 2024 2025 size_t 2026 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2027 { 2028 if (size > m_max_memory_size) 2029 { 2030 // Keep memory read sizes down to a sane limit. This function will be 2031 // called multiple times in order to complete the task by 2032 // lldb_private::Process so it is ok to do this. 2033 size = m_max_memory_size; 2034 } 2035 2036 StreamString packet; 2037 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2038 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2039 StringExtractorGDBRemote response; 2040 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 2041 { 2042 if (response.IsOKResponse()) 2043 { 2044 error.Clear(); 2045 return size; 2046 } 2047 else if (response.IsErrorResponse()) 2048 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2049 else if (response.IsUnsupportedResponse()) 2050 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2051 else 2052 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2053 } 2054 else 2055 { 2056 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 2057 } 2058 return 0; 2059 } 2060 2061 lldb::addr_t 2062 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2063 { 2064 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2065 2066 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2067 switch (supported) 2068 { 2069 case eLazyBoolCalculate: 2070 case eLazyBoolYes: 2071 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2072 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2073 return allocated_addr; 2074 2075 case eLazyBoolNo: 2076 // Call mmap() to create memory in the inferior.. 2077 unsigned prot = 0; 2078 if (permissions & lldb::ePermissionsReadable) 2079 prot |= eMmapProtRead; 2080 if (permissions & lldb::ePermissionsWritable) 2081 prot |= eMmapProtWrite; 2082 if (permissions & lldb::ePermissionsExecutable) 2083 prot |= eMmapProtExec; 2084 2085 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2086 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2087 m_addr_to_mmap_size[allocated_addr] = size; 2088 else 2089 allocated_addr = LLDB_INVALID_ADDRESS; 2090 break; 2091 } 2092 2093 if (allocated_addr == LLDB_INVALID_ADDRESS) 2094 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2095 else 2096 error.Clear(); 2097 return allocated_addr; 2098 } 2099 2100 Error 2101 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2102 MemoryRegionInfo ®ion_info) 2103 { 2104 2105 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2106 return error; 2107 } 2108 2109 Error 2110 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2111 { 2112 2113 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2114 return error; 2115 } 2116 2117 Error 2118 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2119 { 2120 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2121 return error; 2122 } 2123 2124 Error 2125 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2126 { 2127 Error error; 2128 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2129 2130 switch (supported) 2131 { 2132 case eLazyBoolCalculate: 2133 // We should never be deallocating memory without allocating memory 2134 // first so we should never get eLazyBoolCalculate 2135 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2136 break; 2137 2138 case eLazyBoolYes: 2139 if (!m_gdb_comm.DeallocateMemory (addr)) 2140 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2141 break; 2142 2143 case eLazyBoolNo: 2144 // Call munmap() to deallocate memory in the inferior.. 2145 { 2146 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2147 if (pos != m_addr_to_mmap_size.end() && 2148 InferiorCallMunmap(this, addr, pos->second)) 2149 m_addr_to_mmap_size.erase (pos); 2150 else 2151 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2152 } 2153 break; 2154 } 2155 2156 return error; 2157 } 2158 2159 2160 //------------------------------------------------------------------ 2161 // Process STDIO 2162 //------------------------------------------------------------------ 2163 size_t 2164 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2165 { 2166 if (m_stdio_communication.IsConnected()) 2167 { 2168 ConnectionStatus status; 2169 m_stdio_communication.Write(src, src_len, status, NULL); 2170 } 2171 return 0; 2172 } 2173 2174 Error 2175 ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2176 { 2177 Error error; 2178 assert (bp_site != NULL); 2179 2180 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2181 user_id_t site_id = bp_site->GetID(); 2182 const addr_t addr = bp_site->GetLoadAddress(); 2183 if (log) 2184 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2185 2186 if (bp_site->IsEnabled()) 2187 { 2188 if (log) 2189 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2190 return error; 2191 } 2192 else 2193 { 2194 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2195 2196 if (bp_site->HardwarePreferred()) 2197 { 2198 // Try and set hardware breakpoint, and if that fails, fall through 2199 // and set a software breakpoint? 2200 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2201 { 2202 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2203 { 2204 bp_site->SetEnabled(true); 2205 bp_site->SetType (BreakpointSite::eHardware); 2206 return error; 2207 } 2208 } 2209 } 2210 2211 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2212 { 2213 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2214 { 2215 bp_site->SetEnabled(true); 2216 bp_site->SetType (BreakpointSite::eExternal); 2217 return error; 2218 } 2219 } 2220 2221 return EnableSoftwareBreakpoint (bp_site); 2222 } 2223 2224 if (log) 2225 { 2226 const char *err_string = error.AsCString(); 2227 log->Printf ("ProcessGDBRemote::EnableBreakpointSite () error for breakpoint at 0x%8.8" PRIx64 ": %s", 2228 bp_site->GetLoadAddress(), 2229 err_string ? err_string : "NULL"); 2230 } 2231 // We shouldn't reach here on a successful breakpoint enable... 2232 if (error.Success()) 2233 error.SetErrorToGenericError(); 2234 return error; 2235 } 2236 2237 Error 2238 ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2239 { 2240 Error error; 2241 assert (bp_site != NULL); 2242 addr_t addr = bp_site->GetLoadAddress(); 2243 user_id_t site_id = bp_site->GetID(); 2244 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2245 if (log) 2246 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2247 2248 if (bp_site->IsEnabled()) 2249 { 2250 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2251 2252 BreakpointSite::Type bp_type = bp_site->GetType(); 2253 switch (bp_type) 2254 { 2255 case BreakpointSite::eSoftware: 2256 error = DisableSoftwareBreakpoint (bp_site); 2257 break; 2258 2259 case BreakpointSite::eHardware: 2260 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2261 error.SetErrorToGenericError(); 2262 break; 2263 2264 case BreakpointSite::eExternal: 2265 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2266 error.SetErrorToGenericError(); 2267 break; 2268 } 2269 if (error.Success()) 2270 bp_site->SetEnabled(false); 2271 } 2272 else 2273 { 2274 if (log) 2275 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2276 return error; 2277 } 2278 2279 if (error.Success()) 2280 error.SetErrorToGenericError(); 2281 return error; 2282 } 2283 2284 // Pre-requisite: wp != NULL. 2285 static GDBStoppointType 2286 GetGDBStoppointType (Watchpoint *wp) 2287 { 2288 assert(wp); 2289 bool watch_read = wp->WatchpointRead(); 2290 bool watch_write = wp->WatchpointWrite(); 2291 2292 // watch_read and watch_write cannot both be false. 2293 assert(watch_read || watch_write); 2294 if (watch_read && watch_write) 2295 return eWatchpointReadWrite; 2296 else if (watch_read) 2297 return eWatchpointRead; 2298 else // Must be watch_write, then. 2299 return eWatchpointWrite; 2300 } 2301 2302 Error 2303 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2304 { 2305 Error error; 2306 if (wp) 2307 { 2308 user_id_t watchID = wp->GetID(); 2309 addr_t addr = wp->GetLoadAddress(); 2310 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2311 if (log) 2312 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2313 if (wp->IsEnabled()) 2314 { 2315 if (log) 2316 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2317 return error; 2318 } 2319 2320 GDBStoppointType type = GetGDBStoppointType(wp); 2321 // Pass down an appropriate z/Z packet... 2322 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2323 { 2324 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2325 { 2326 wp->SetEnabled(true, notify); 2327 return error; 2328 } 2329 else 2330 error.SetErrorString("sending gdb watchpoint packet failed"); 2331 } 2332 else 2333 error.SetErrorString("watchpoints not supported"); 2334 } 2335 else 2336 { 2337 error.SetErrorString("Watchpoint argument was NULL."); 2338 } 2339 if (error.Success()) 2340 error.SetErrorToGenericError(); 2341 return error; 2342 } 2343 2344 Error 2345 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2346 { 2347 Error error; 2348 if (wp) 2349 { 2350 user_id_t watchID = wp->GetID(); 2351 2352 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2353 2354 addr_t addr = wp->GetLoadAddress(); 2355 2356 if (log) 2357 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2358 2359 if (!wp->IsEnabled()) 2360 { 2361 if (log) 2362 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2363 // See also 'class WatchpointSentry' within StopInfo.cpp. 2364 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2365 // the watchpoint object to intelligently process this action. 2366 wp->SetEnabled(false, notify); 2367 return error; 2368 } 2369 2370 if (wp->IsHardware()) 2371 { 2372 GDBStoppointType type = GetGDBStoppointType(wp); 2373 // Pass down an appropriate z/Z packet... 2374 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2375 { 2376 wp->SetEnabled(false, notify); 2377 return error; 2378 } 2379 else 2380 error.SetErrorString("sending gdb watchpoint packet failed"); 2381 } 2382 // TODO: clear software watchpoints if we implement them 2383 } 2384 else 2385 { 2386 error.SetErrorString("Watchpoint argument was NULL."); 2387 } 2388 if (error.Success()) 2389 error.SetErrorToGenericError(); 2390 return error; 2391 } 2392 2393 void 2394 ProcessGDBRemote::Clear() 2395 { 2396 m_flags = 0; 2397 m_thread_list.Clear(); 2398 } 2399 2400 Error 2401 ProcessGDBRemote::DoSignal (int signo) 2402 { 2403 Error error; 2404 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2405 if (log) 2406 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2407 2408 if (!m_gdb_comm.SendAsyncSignal (signo)) 2409 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2410 return error; 2411 } 2412 2413 Error 2414 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2415 { 2416 ProcessLaunchInfo launch_info; 2417 return StartDebugserverProcess(debugserver_url, launch_info); 2418 } 2419 2420 Error 2421 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2422 { 2423 Error error; 2424 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2425 { 2426 // If we locate debugserver, keep that located version around 2427 static FileSpec g_debugserver_file_spec; 2428 2429 ProcessLaunchInfo debugserver_launch_info; 2430 char debugserver_path[PATH_MAX]; 2431 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2432 2433 // Always check to see if we have an environment override for the path 2434 // to the debugserver to use and use it if we do. 2435 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2436 if (env_debugserver_path) 2437 debugserver_file_spec.SetFile (env_debugserver_path, false); 2438 else 2439 debugserver_file_spec = g_debugserver_file_spec; 2440 bool debugserver_exists = debugserver_file_spec.Exists(); 2441 if (!debugserver_exists) 2442 { 2443 // The debugserver binary is in the LLDB.framework/Resources 2444 // directory. 2445 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2446 { 2447 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2448 debugserver_exists = debugserver_file_spec.Exists(); 2449 if (debugserver_exists) 2450 { 2451 g_debugserver_file_spec = debugserver_file_spec; 2452 } 2453 else 2454 { 2455 g_debugserver_file_spec.Clear(); 2456 debugserver_file_spec.Clear(); 2457 } 2458 } 2459 } 2460 2461 if (debugserver_exists) 2462 { 2463 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2464 2465 m_stdio_communication.Clear(); 2466 2467 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2468 2469 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2470 char arg_cstr[PATH_MAX]; 2471 2472 // Start args with "debugserver /file/path -r --" 2473 debugserver_args.AppendArgument(debugserver_path); 2474 debugserver_args.AppendArgument(debugserver_url); 2475 // use native registers, not the GDB registers 2476 debugserver_args.AppendArgument("--native-regs"); 2477 // make debugserver run in its own session so signals generated by 2478 // special terminal key sequences (^C) don't affect debugserver 2479 debugserver_args.AppendArgument("--setsid"); 2480 2481 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2482 if (env_debugserver_log_file) 2483 { 2484 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2485 debugserver_args.AppendArgument(arg_cstr); 2486 } 2487 2488 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2489 if (env_debugserver_log_flags) 2490 { 2491 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2492 debugserver_args.AppendArgument(arg_cstr); 2493 } 2494 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2495 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2496 2497 // We currently send down all arguments, attach pids, or attach 2498 // process names in dedicated GDB server packets, so we don't need 2499 // to pass them as arguments. This is currently because of all the 2500 // things we need to setup prior to launching: the environment, 2501 // current working dir, file actions, etc. 2502 #if 0 2503 // Now append the program arguments 2504 if (inferior_argv) 2505 { 2506 // Terminate the debugserver args so we can now append the inferior args 2507 debugserver_args.AppendArgument("--"); 2508 2509 for (int i = 0; inferior_argv[i] != NULL; ++i) 2510 debugserver_args.AppendArgument (inferior_argv[i]); 2511 } 2512 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2513 { 2514 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2515 debugserver_args.AppendArgument (arg_cstr); 2516 } 2517 else if (attach_name && attach_name[0]) 2518 { 2519 if (wait_for_launch) 2520 debugserver_args.AppendArgument ("--waitfor"); 2521 else 2522 debugserver_args.AppendArgument ("--attach"); 2523 debugserver_args.AppendArgument (attach_name); 2524 } 2525 #endif 2526 2527 ProcessLaunchInfo::FileAction file_action; 2528 2529 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2530 // to "/dev/null" if we run into any problems. 2531 file_action.Close (STDIN_FILENO); 2532 debugserver_launch_info.AppendFileAction (file_action); 2533 file_action.Close (STDOUT_FILENO); 2534 debugserver_launch_info.AppendFileAction (file_action); 2535 file_action.Close (STDERR_FILENO); 2536 debugserver_launch_info.AppendFileAction (file_action); 2537 2538 if (log) 2539 { 2540 StreamString strm; 2541 debugserver_args.Dump (&strm); 2542 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2543 } 2544 2545 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2546 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2547 2548 error = Host::LaunchProcess(debugserver_launch_info); 2549 2550 if (error.Success ()) 2551 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2552 else 2553 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2554 2555 if (error.Fail() || log) 2556 error.PutToLog(log, "Host::LaunchProcess (launch_info) => pid=%" PRIu64 ", path='%s'", m_debugserver_pid, debugserver_path); 2557 } 2558 else 2559 { 2560 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2561 } 2562 2563 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2564 StartAsyncThread (); 2565 } 2566 return error; 2567 } 2568 2569 bool 2570 ProcessGDBRemote::MonitorDebugserverProcess 2571 ( 2572 void *callback_baton, 2573 lldb::pid_t debugserver_pid, 2574 bool exited, // True if the process did exit 2575 int signo, // Zero for no signal 2576 int exit_status // Exit value of process if signal is zero 2577 ) 2578 { 2579 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2580 // and might not exist anymore, so we need to carefully try to get the 2581 // target for this process first since we have a race condition when 2582 // we are done running between getting the notice that the inferior 2583 // process has died and the debugserver that was debugging this process. 2584 // In our test suite, we are also continually running process after 2585 // process, so we must be very careful to make sure: 2586 // 1 - process object hasn't been deleted already 2587 // 2 - that a new process object hasn't been recreated in its place 2588 2589 // "debugserver_pid" argument passed in is the process ID for 2590 // debugserver that we are tracking... 2591 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2592 2593 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2594 2595 // Get a shared pointer to the target that has a matching process pointer. 2596 // This target could be gone, or the target could already have a new process 2597 // object inside of it 2598 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2599 2600 if (log) 2601 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2602 2603 if (target_sp) 2604 { 2605 // We found a process in a target that matches, but another thread 2606 // might be in the process of launching a new process that will 2607 // soon replace it, so get a shared pointer to the process so we 2608 // can keep it alive. 2609 ProcessSP process_sp (target_sp->GetProcessSP()); 2610 // Now we have a shared pointer to the process that can't go away on us 2611 // so we now make sure it was the same as the one passed in, and also make 2612 // sure that our previous "process *" didn't get deleted and have a new 2613 // "process *" created in its place with the same pointer. To verify this 2614 // we make sure the process has our debugserver process ID. If we pass all 2615 // of these tests, then we are sure that this process is the one we were 2616 // looking for. 2617 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2618 { 2619 // Sleep for a half a second to make sure our inferior process has 2620 // time to set its exit status before we set it incorrectly when 2621 // both the debugserver and the inferior process shut down. 2622 usleep (500000); 2623 // If our process hasn't yet exited, debugserver might have died. 2624 // If the process did exit, the we are reaping it. 2625 const StateType state = process->GetState(); 2626 2627 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2628 state != eStateInvalid && 2629 state != eStateUnloaded && 2630 state != eStateExited && 2631 state != eStateDetached) 2632 { 2633 char error_str[1024]; 2634 if (signo) 2635 { 2636 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2637 if (signal_cstr) 2638 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2639 else 2640 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2641 } 2642 else 2643 { 2644 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2645 } 2646 2647 process->SetExitStatus (-1, error_str); 2648 } 2649 // Debugserver has exited we need to let our ProcessGDBRemote 2650 // know that it no longer has a debugserver instance 2651 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2652 } 2653 } 2654 return true; 2655 } 2656 2657 void 2658 ProcessGDBRemote::KillDebugserverProcess () 2659 { 2660 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2661 { 2662 ::kill (m_debugserver_pid, SIGINT); 2663 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2664 } 2665 } 2666 2667 void 2668 ProcessGDBRemote::Initialize() 2669 { 2670 static bool g_initialized = false; 2671 2672 if (g_initialized == false) 2673 { 2674 g_initialized = true; 2675 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2676 GetPluginDescriptionStatic(), 2677 CreateInstance); 2678 2679 Log::Callbacks log_callbacks = { 2680 ProcessGDBRemoteLog::DisableLog, 2681 ProcessGDBRemoteLog::EnableLog, 2682 ProcessGDBRemoteLog::ListLogCategories 2683 }; 2684 2685 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2686 } 2687 } 2688 2689 bool 2690 ProcessGDBRemote::StartAsyncThread () 2691 { 2692 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2693 2694 if (log) 2695 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2696 2697 Mutex::Locker start_locker(m_async_thread_state_mutex); 2698 if (m_async_thread_state == eAsyncThreadNotStarted) 2699 { 2700 // Create a thread that watches our internal state and controls which 2701 // events make it to clients (into the DCProcess event queue). 2702 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2703 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2704 { 2705 m_async_thread_state = eAsyncThreadRunning; 2706 return true; 2707 } 2708 else 2709 return false; 2710 } 2711 else 2712 { 2713 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2714 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2715 if (log) 2716 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2717 if (m_async_thread_state == eAsyncThreadRunning) 2718 return true; 2719 else 2720 return false; 2721 } 2722 } 2723 2724 void 2725 ProcessGDBRemote::StopAsyncThread () 2726 { 2727 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2728 2729 if (log) 2730 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2731 2732 Mutex::Locker start_locker(m_async_thread_state_mutex); 2733 if (m_async_thread_state == eAsyncThreadRunning) 2734 { 2735 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2736 2737 // This will shut down the async thread. 2738 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2739 2740 // Stop the stdio thread 2741 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2742 { 2743 Host::ThreadJoin (m_async_thread, NULL, NULL); 2744 } 2745 m_async_thread_state = eAsyncThreadDone; 2746 } 2747 else 2748 { 2749 if (log) 2750 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2751 } 2752 } 2753 2754 2755 void * 2756 ProcessGDBRemote::AsyncThread (void *arg) 2757 { 2758 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2759 2760 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2761 if (log) 2762 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2763 2764 Listener listener ("ProcessGDBRemote::AsyncThread"); 2765 EventSP event_sp; 2766 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2767 eBroadcastBitAsyncThreadShouldExit; 2768 2769 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2770 { 2771 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2772 2773 bool done = false; 2774 while (!done) 2775 { 2776 if (log) 2777 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2778 if (listener.WaitForEvent (NULL, event_sp)) 2779 { 2780 const uint32_t event_type = event_sp->GetType(); 2781 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2782 { 2783 if (log) 2784 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2785 2786 switch (event_type) 2787 { 2788 case eBroadcastBitAsyncContinue: 2789 { 2790 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2791 2792 if (continue_packet) 2793 { 2794 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2795 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2796 if (log) 2797 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2798 2799 if (::strstr (continue_cstr, "vAttach") == NULL) 2800 process->SetPrivateState(eStateRunning); 2801 StringExtractorGDBRemote response; 2802 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2803 2804 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2805 // The thread ID list might be contained within the "response", or the stop reply packet that 2806 // caused the stop. So clear it now before we give the stop reply packet to the process 2807 // using the process->SetLastStopPacket()... 2808 process->ClearThreadIDList (); 2809 2810 switch (stop_state) 2811 { 2812 case eStateStopped: 2813 case eStateCrashed: 2814 case eStateSuspended: 2815 process->SetLastStopPacket (response); 2816 process->SetPrivateState (stop_state); 2817 break; 2818 2819 case eStateExited: 2820 process->SetLastStopPacket (response); 2821 process->ClearThreadIDList(); 2822 response.SetFilePos(1); 2823 process->SetExitStatus(response.GetHexU8(), NULL); 2824 done = true; 2825 break; 2826 2827 case eStateInvalid: 2828 process->SetExitStatus(-1, "lost connection"); 2829 break; 2830 2831 default: 2832 process->SetPrivateState (stop_state); 2833 break; 2834 } 2835 } 2836 } 2837 break; 2838 2839 case eBroadcastBitAsyncThreadShouldExit: 2840 if (log) 2841 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2842 done = true; 2843 break; 2844 2845 default: 2846 if (log) 2847 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2848 done = true; 2849 break; 2850 } 2851 } 2852 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2853 { 2854 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2855 { 2856 process->SetExitStatus (-1, "lost connection"); 2857 done = true; 2858 } 2859 } 2860 } 2861 else 2862 { 2863 if (log) 2864 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2865 done = true; 2866 } 2867 } 2868 } 2869 2870 if (log) 2871 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 2872 2873 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2874 return NULL; 2875 } 2876 2877 const char * 2878 ProcessGDBRemote::GetDispatchQueueNameForThread 2879 ( 2880 addr_t thread_dispatch_qaddr, 2881 std::string &dispatch_queue_name 2882 ) 2883 { 2884 dispatch_queue_name.clear(); 2885 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2886 { 2887 // Cache the dispatch_queue_offsets_addr value so we don't always have 2888 // to look it up 2889 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2890 { 2891 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2892 const Symbol *dispatch_queue_offsets_symbol = NULL; 2893 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2894 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2895 if (module_sp) 2896 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2897 2898 if (dispatch_queue_offsets_symbol == NULL) 2899 { 2900 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2901 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2902 if (module_sp) 2903 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2904 } 2905 if (dispatch_queue_offsets_symbol) 2906 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2907 2908 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2909 return NULL; 2910 } 2911 2912 uint8_t memory_buffer[8]; 2913 DataExtractor data (memory_buffer, 2914 sizeof(memory_buffer), 2915 m_target.GetArchitecture().GetByteOrder(), 2916 m_target.GetArchitecture().GetAddressByteSize()); 2917 2918 // Excerpt from src/queue_private.h 2919 struct dispatch_queue_offsets_s 2920 { 2921 uint16_t dqo_version; 2922 uint16_t dqo_label; // in version 1-3, offset to string; in version 4+, offset to a pointer to a string 2923 uint16_t dqo_label_size; // in version 1-3, length of string; in version 4+, size of a (void*) in this process 2924 } dispatch_queue_offsets; 2925 2926 2927 Error error; 2928 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2929 { 2930 lldb::offset_t data_offset = 0; 2931 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2932 { 2933 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2934 { 2935 data_offset = 0; 2936 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2937 if (dispatch_queue_offsets.dqo_version >= 4) 2938 { 2939 // libdispatch versions 4+, pointer to dispatch name is in the 2940 // queue structure. 2941 lldb::addr_t pointer_to_label_address = queue_addr + dispatch_queue_offsets.dqo_label; 2942 if (ReadMemory (pointer_to_label_address, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2943 { 2944 data_offset = 0; 2945 lldb::addr_t label_addr = data.GetAddress(&data_offset); 2946 ReadCStringFromMemory (label_addr, dispatch_queue_name, error); 2947 } 2948 } 2949 else 2950 { 2951 // libdispatch versions 1-3, dispatch name is a fixed width char array 2952 // in the queue structure. 2953 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2954 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2955 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2956 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2957 dispatch_queue_name.erase (bytes_read); 2958 } 2959 } 2960 } 2961 } 2962 } 2963 if (dispatch_queue_name.empty()) 2964 return NULL; 2965 return dispatch_queue_name.c_str(); 2966 } 2967 2968 //uint32_t 2969 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2970 //{ 2971 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2972 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2973 // if (m_local_debugserver) 2974 // { 2975 // return Host::ListProcessesMatchingName (name, matches, pids); 2976 // } 2977 // else 2978 // { 2979 // // FIXME: Implement talking to the remote debugserver. 2980 // return 0; 2981 // } 2982 // 2983 //} 2984 // 2985 bool 2986 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2987 lldb_private::StoppointCallbackContext *context, 2988 lldb::user_id_t break_id, 2989 lldb::user_id_t break_loc_id) 2990 { 2991 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2992 // run so I can stop it if that's what I want to do. 2993 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2994 if (log) 2995 log->Printf("Hit New Thread Notification breakpoint."); 2996 return false; 2997 } 2998 2999 3000 bool 3001 ProcessGDBRemote::StartNoticingNewThreads() 3002 { 3003 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3004 if (m_thread_create_bp_sp) 3005 { 3006 if (log && log->GetVerbose()) 3007 log->Printf("Enabled noticing new thread breakpoint."); 3008 m_thread_create_bp_sp->SetEnabled(true); 3009 } 3010 else 3011 { 3012 PlatformSP platform_sp (m_target.GetPlatform()); 3013 if (platform_sp) 3014 { 3015 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3016 if (m_thread_create_bp_sp) 3017 { 3018 if (log && log->GetVerbose()) 3019 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3020 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3021 } 3022 else 3023 { 3024 if (log) 3025 log->Printf("Failed to create new thread notification breakpoint."); 3026 } 3027 } 3028 } 3029 return m_thread_create_bp_sp.get() != NULL; 3030 } 3031 3032 bool 3033 ProcessGDBRemote::StopNoticingNewThreads() 3034 { 3035 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3036 if (log && log->GetVerbose()) 3037 log->Printf ("Disabling new thread notification breakpoint."); 3038 3039 if (m_thread_create_bp_sp) 3040 m_thread_create_bp_sp->SetEnabled(false); 3041 3042 return true; 3043 } 3044 3045 lldb_private::DynamicLoader * 3046 ProcessGDBRemote::GetDynamicLoader () 3047 { 3048 if (m_dyld_ap.get() == NULL) 3049 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, m_dyld_plugin_name.empty() ? NULL : m_dyld_plugin_name.c_str())); 3050 return m_dyld_ap.get(); 3051 } 3052 3053 3054 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 3055 { 3056 private: 3057 3058 public: 3059 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3060 CommandObjectParsed (interpreter, 3061 "process plugin packet history", 3062 "Dumps the packet history buffer. ", 3063 NULL) 3064 { 3065 } 3066 3067 ~CommandObjectProcessGDBRemotePacketHistory () 3068 { 3069 } 3070 3071 bool 3072 DoExecute (Args& command, CommandReturnObject &result) 3073 { 3074 const size_t argc = command.GetArgumentCount(); 3075 if (argc == 0) 3076 { 3077 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3078 if (process) 3079 { 3080 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3081 result.SetStatus (eReturnStatusSuccessFinishResult); 3082 return true; 3083 } 3084 } 3085 else 3086 { 3087 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3088 } 3089 result.SetStatus (eReturnStatusFailed); 3090 return false; 3091 } 3092 }; 3093 3094 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3095 { 3096 private: 3097 3098 public: 3099 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3100 CommandObjectParsed (interpreter, 3101 "process plugin packet send", 3102 "Send a custom packet through the GDB remote protocol and print the answer. " 3103 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3104 NULL) 3105 { 3106 } 3107 3108 ~CommandObjectProcessGDBRemotePacketSend () 3109 { 3110 } 3111 3112 bool 3113 DoExecute (Args& command, CommandReturnObject &result) 3114 { 3115 const size_t argc = command.GetArgumentCount(); 3116 if (argc == 0) 3117 { 3118 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3119 result.SetStatus (eReturnStatusFailed); 3120 return false; 3121 } 3122 3123 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3124 if (process) 3125 { 3126 for (size_t i=0; i<argc; ++ i) 3127 { 3128 const char *packet_cstr = command.GetArgumentAtIndex(0); 3129 bool send_async = true; 3130 StringExtractorGDBRemote response; 3131 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3132 result.SetStatus (eReturnStatusSuccessFinishResult); 3133 Stream &output_strm = result.GetOutputStream(); 3134 output_strm.Printf (" packet: %s\n", packet_cstr); 3135 std::string &response_str = response.GetStringRef(); 3136 3137 if (strcmp(packet_cstr, "qGetProfileData") == 0) 3138 { 3139 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3140 } 3141 3142 if (response_str.empty()) 3143 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3144 else 3145 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3146 } 3147 } 3148 return true; 3149 } 3150 }; 3151 3152 class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3153 { 3154 private: 3155 3156 public: 3157 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3158 CommandObjectRaw (interpreter, 3159 "process plugin packet monitor", 3160 "Send a qRcmd packet through the GDB remote protocol and print the response." 3161 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3162 NULL) 3163 { 3164 } 3165 3166 ~CommandObjectProcessGDBRemotePacketMonitor () 3167 { 3168 } 3169 3170 bool 3171 DoExecute (const char *command, CommandReturnObject &result) 3172 { 3173 if (command == NULL || command[0] == '\0') 3174 { 3175 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3176 result.SetStatus (eReturnStatusFailed); 3177 return false; 3178 } 3179 3180 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3181 if (process) 3182 { 3183 StreamString packet; 3184 packet.PutCString("qRcmd,"); 3185 packet.PutBytesAsRawHex8(command, strlen(command)); 3186 const char *packet_cstr = packet.GetString().c_str(); 3187 3188 bool send_async = true; 3189 StringExtractorGDBRemote response; 3190 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3191 result.SetStatus (eReturnStatusSuccessFinishResult); 3192 Stream &output_strm = result.GetOutputStream(); 3193 output_strm.Printf (" packet: %s\n", packet_cstr); 3194 const std::string &response_str = response.GetStringRef(); 3195 3196 if (response_str.empty()) 3197 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3198 else 3199 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3200 } 3201 return true; 3202 } 3203 }; 3204 3205 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3206 { 3207 private: 3208 3209 public: 3210 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3211 CommandObjectMultiword (interpreter, 3212 "process plugin packet", 3213 "Commands that deal with GDB remote packets.", 3214 NULL) 3215 { 3216 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3217 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3218 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3219 } 3220 3221 ~CommandObjectProcessGDBRemotePacket () 3222 { 3223 } 3224 }; 3225 3226 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3227 { 3228 public: 3229 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3230 CommandObjectMultiword (interpreter, 3231 "process plugin", 3232 "A set of commands for operating on a ProcessGDBRemote process.", 3233 "process plugin <subcommand> [<subcommand-options>]") 3234 { 3235 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3236 } 3237 3238 ~CommandObjectMultiwordProcessGDBRemote () 3239 { 3240 } 3241 }; 3242 3243 CommandObject * 3244 ProcessGDBRemote::GetPluginCommandObject() 3245 { 3246 if (!m_command_sp) 3247 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3248 return m_command_sp.get(); 3249 } 3250