ProcessGDBRemote.cpp revision 102b2c2681c9a830afe25bfea35557421905e42c
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 68namespace 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" 88using namespace lldb; 89using namespace lldb_private; 90 91static 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 105static inline uint16_t 106get_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 119const char * 120ProcessGDBRemote::GetPluginNameStatic() 121{ 122 return "gdb-remote"; 123} 124 125const char * 126ProcessGDBRemote::GetPluginDescriptionStatic() 127{ 128 return "GDB Remote protocol based debugging plug-in."; 129} 130 131void 132ProcessGDBRemote::Terminate() 133{ 134 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 135} 136 137 138lldb::ProcessSP 139ProcessGDBRemote::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 147bool 148ProcessGDBRemote::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//---------------------------------------------------------------------- 182ProcessGDBRemote::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//---------------------------------------------------------------------- 216ProcessGDBRemote::~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//---------------------------------------------------------------------- 236const char * 237ProcessGDBRemote::GetPluginName() 238{ 239 return "Process debugging plug-in that uses the GDB remote protocol"; 240} 241 242const char * 243ProcessGDBRemote::GetShortPluginName() 244{ 245 return GetPluginNameStatic(); 246} 247 248uint32_t 249ProcessGDBRemote::GetPluginVersion() 250{ 251 return 1; 252} 253 254void 255ProcessGDBRemote::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 463Error 464ProcessGDBRemote::WillLaunch (Module* module) 465{ 466 return WillLaunchOrAttach (); 467} 468 469Error 470ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 471{ 472 return WillLaunchOrAttach (); 473} 474 475Error 476ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 477{ 478 return WillLaunchOrAttach (); 479} 480 481Error 482ProcessGDBRemote::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 536Error 537ProcessGDBRemote::WillLaunchOrAttach () 538{ 539 Error error; 540 m_stdio_communication.Clear (); 541 return error; 542} 543 544//---------------------------------------------------------------------- 545// Process Control 546//---------------------------------------------------------------------- 547Error 548ProcessGDBRemote::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 736Error 737ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 738{ 739 Error error; 740 // Sleep and wait a bit for debugserver to start to listen... 741 std::unique_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 798void 799ProcessGDBRemote::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 868void 869ProcessGDBRemote::DidLaunch () 870{ 871 DidLaunchOrAttach (); 872} 873 874Error 875ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 876{ 877 ProcessAttachInfo attach_info; 878 return DoAttachToProcessWithID(attach_pid, attach_info); 879} 880 881Error 882ProcessGDBRemote::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 924size_t 925ProcessGDBRemote::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 945Error 946ProcessGDBRemote::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 1008void 1009ProcessGDBRemote::DidAttach () 1010{ 1011 DidLaunchOrAttach (); 1012} 1013 1014void 1015ProcessGDBRemote::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 1025Error 1026ProcessGDBRemote::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 1035Error 1036ProcessGDBRemote::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 1272void 1273ProcessGDBRemote::ClearThreadIDList () 1274{ 1275 Mutex::Locker locker(m_thread_list.GetMutex()); 1276 m_thread_ids.clear(); 1277} 1278 1279bool 1280ProcessGDBRemote::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 1292bool 1293ProcessGDBRemote::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 1340StateType 1341ProcessGDBRemote::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 1622void 1623ProcessGDBRemote::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 1644Error 1645ProcessGDBRemote::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 1673Error 1674ProcessGDBRemote::DoDetach() 1675{ 1676 Error error; 1677 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1678 if (log) 1679 log->Printf ("ProcessGDBRemote::DoDetach()"); 1680 1681 DisableAllBreakpointSites (); 1682 1683 m_thread_list.DiscardThreadPlans(); 1684 1685 bool success = m_gdb_comm.Detach (); 1686 if (log) 1687 { 1688 if (success) 1689 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1690 else 1691 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1692 } 1693 // Sleep for one second to let the process get all detached... 1694 StopAsyncThread (); 1695 1696 SetPrivateState (eStateDetached); 1697 ResumePrivateStateThread(); 1698 1699 //KillDebugserverProcess (); 1700 return error; 1701} 1702 1703 1704Error 1705ProcessGDBRemote::DoDestroy () 1706{ 1707 Error error; 1708 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1709 if (log) 1710 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1711 1712 // There is a bug in older iOS debugservers where they don't shut down the process 1713 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1714 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1715 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1716 // destroy it again. 1717 // 1718 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1719 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1720 // the debugservers with this bug are equal. There really should be a better way to test this! 1721 // 1722 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1723 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1724 // just do the straight-forward kill. 1725 // 1726 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1727 // necessary (or helpful) to do any of this. 1728 1729 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1730 { 1731 PlatformSP platform_sp = GetTarget().GetPlatform(); 1732 1733 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1734 if (platform_sp 1735 && platform_sp->GetName() 1736 && strcmp (platform_sp->GetName(), PlatformRemoteiOS::GetShortPluginNameStatic()) == 0) 1737 { 1738 if (m_destroy_tried_resuming) 1739 { 1740 if (log) 1741 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1742 } 1743 else 1744 { 1745 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1746 // but we really need it to happen here and it doesn't matter if we do it twice. 1747 m_thread_list.DiscardThreadPlans(); 1748 DisableAllBreakpointSites(); 1749 1750 bool stop_looks_like_crash = false; 1751 ThreadList &threads = GetThreadList(); 1752 1753 { 1754 Mutex::Locker locker(threads.GetMutex()); 1755 1756 size_t num_threads = threads.GetSize(); 1757 for (size_t i = 0; i < num_threads; i++) 1758 { 1759 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1760 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1761 StopReason reason = eStopReasonInvalid; 1762 if (stop_info_sp) 1763 reason = stop_info_sp->GetStopReason(); 1764 if (reason == eStopReasonBreakpoint 1765 || reason == eStopReasonException) 1766 { 1767 if (log) 1768 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: %" PRId64 " stopped with reason: %s.", 1769 thread_sp->GetID(), 1770 stop_info_sp->GetDescription()); 1771 stop_looks_like_crash = true; 1772 break; 1773 } 1774 } 1775 } 1776 1777 if (stop_looks_like_crash) 1778 { 1779 if (log) 1780 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1781 m_destroy_tried_resuming = true; 1782 1783 // If we are going to run again before killing, it would be good to suspend all the threads 1784 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1785 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1786 // have to run the risk of letting those threads proceed a bit. 1787 1788 { 1789 Mutex::Locker locker(threads.GetMutex()); 1790 1791 size_t num_threads = threads.GetSize(); 1792 for (size_t i = 0; i < num_threads; i++) 1793 { 1794 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1795 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1796 StopReason reason = eStopReasonInvalid; 1797 if (stop_info_sp) 1798 reason = stop_info_sp->GetStopReason(); 1799 if (reason != eStopReasonBreakpoint 1800 && reason != eStopReasonException) 1801 { 1802 if (log) 1803 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: %" PRId64 " before running.", 1804 thread_sp->GetID()); 1805 thread_sp->SetResumeState(eStateSuspended); 1806 } 1807 } 1808 } 1809 Resume (); 1810 return Destroy(); 1811 } 1812 } 1813 } 1814 } 1815 1816 // Interrupt if our inferior is running... 1817 int exit_status = SIGABRT; 1818 std::string exit_string; 1819 1820 if (m_gdb_comm.IsConnected()) 1821 { 1822 if (m_public_state.GetValue() != eStateAttaching) 1823 { 1824 1825 StringExtractorGDBRemote response; 1826 bool send_async = true; 1827 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 1828 1829 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1830 { 1831 char packet_cmd = response.GetChar(0); 1832 1833 if (packet_cmd == 'W' || packet_cmd == 'X') 1834 { 1835 SetLastStopPacket (response); 1836 ClearThreadIDList (); 1837 exit_status = response.GetHexU8(); 1838 } 1839 else 1840 { 1841 if (log) 1842 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 1843 exit_string.assign("got unexpected response to k packet: "); 1844 exit_string.append(response.GetStringRef()); 1845 } 1846 } 1847 else 1848 { 1849 if (log) 1850 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1851 exit_string.assign("failed to send the k packet"); 1852 } 1853 1854 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 1855 } 1856 else 1857 { 1858 if (log) 1859 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1860 exit_string.assign ("killed or interrupted while attaching."); 1861 } 1862 } 1863 else 1864 { 1865 // If we missed setting the exit status on the way out, do it here. 1866 // NB set exit status can be called multiple times, the first one sets the status. 1867 exit_string.assign("destroying when not connected to debugserver"); 1868 } 1869 1870 SetExitStatus(exit_status, exit_string.c_str()); 1871 1872 StopAsyncThread (); 1873 KillDebugserverProcess (); 1874 return error; 1875} 1876 1877//------------------------------------------------------------------ 1878// Process Queries 1879//------------------------------------------------------------------ 1880 1881bool 1882ProcessGDBRemote::IsAlive () 1883{ 1884 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1885} 1886 1887addr_t 1888ProcessGDBRemote::GetImageInfoAddress() 1889{ 1890 return m_gdb_comm.GetShlibInfoAddr(); 1891} 1892 1893//------------------------------------------------------------------ 1894// Process Memory 1895//------------------------------------------------------------------ 1896size_t 1897ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 1898{ 1899 if (size > m_max_memory_size) 1900 { 1901 // Keep memory read sizes down to a sane limit. This function will be 1902 // called multiple times in order to complete the task by 1903 // lldb_private::Process so it is ok to do this. 1904 size = m_max_memory_size; 1905 } 1906 1907 char packet[64]; 1908 const int packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 1909 assert (packet_len + 1 < sizeof(packet)); 1910 StringExtractorGDBRemote response; 1911 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 1912 { 1913 if (response.IsNormalResponse()) 1914 { 1915 error.Clear(); 1916 return response.GetHexBytes(buf, size, '\xdd'); 1917 } 1918 else if (response.IsErrorResponse()) 1919 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 1920 else if (response.IsUnsupportedResponse()) 1921 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 1922 else 1923 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 1924 } 1925 else 1926 { 1927 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 1928 } 1929 return 0; 1930} 1931 1932size_t 1933ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 1934{ 1935 if (size > m_max_memory_size) 1936 { 1937 // Keep memory read sizes down to a sane limit. This function will be 1938 // called multiple times in order to complete the task by 1939 // lldb_private::Process so it is ok to do this. 1940 size = m_max_memory_size; 1941 } 1942 1943 StreamString packet; 1944 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 1945 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1946 StringExtractorGDBRemote response; 1947 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 1948 { 1949 if (response.IsOKResponse()) 1950 { 1951 error.Clear(); 1952 return size; 1953 } 1954 else if (response.IsErrorResponse()) 1955 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 1956 else if (response.IsUnsupportedResponse()) 1957 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 1958 else 1959 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 1960 } 1961 else 1962 { 1963 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 1964 } 1965 return 0; 1966} 1967 1968lldb::addr_t 1969ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 1970{ 1971 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 1972 1973 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 1974 switch (supported) 1975 { 1976 case eLazyBoolCalculate: 1977 case eLazyBoolYes: 1978 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 1979 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 1980 return allocated_addr; 1981 1982 case eLazyBoolNo: 1983 // Call mmap() to create memory in the inferior.. 1984 unsigned prot = 0; 1985 if (permissions & lldb::ePermissionsReadable) 1986 prot |= eMmapProtRead; 1987 if (permissions & lldb::ePermissionsWritable) 1988 prot |= eMmapProtWrite; 1989 if (permissions & lldb::ePermissionsExecutable) 1990 prot |= eMmapProtExec; 1991 1992 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 1993 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 1994 m_addr_to_mmap_size[allocated_addr] = size; 1995 else 1996 allocated_addr = LLDB_INVALID_ADDRESS; 1997 break; 1998 } 1999 2000 if (allocated_addr == LLDB_INVALID_ADDRESS) 2001 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2002 else 2003 error.Clear(); 2004 return allocated_addr; 2005} 2006 2007Error 2008ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2009 MemoryRegionInfo ®ion_info) 2010{ 2011 2012 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2013 return error; 2014} 2015 2016Error 2017ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2018{ 2019 2020 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2021 return error; 2022} 2023 2024Error 2025ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2026{ 2027 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2028 return error; 2029} 2030 2031Error 2032ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2033{ 2034 Error error; 2035 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2036 2037 switch (supported) 2038 { 2039 case eLazyBoolCalculate: 2040 // We should never be deallocating memory without allocating memory 2041 // first so we should never get eLazyBoolCalculate 2042 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2043 break; 2044 2045 case eLazyBoolYes: 2046 if (!m_gdb_comm.DeallocateMemory (addr)) 2047 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2048 break; 2049 2050 case eLazyBoolNo: 2051 // Call munmap() to deallocate memory in the inferior.. 2052 { 2053 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2054 if (pos != m_addr_to_mmap_size.end() && 2055 InferiorCallMunmap(this, addr, pos->second)) 2056 m_addr_to_mmap_size.erase (pos); 2057 else 2058 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2059 } 2060 break; 2061 } 2062 2063 return error; 2064} 2065 2066 2067//------------------------------------------------------------------ 2068// Process STDIO 2069//------------------------------------------------------------------ 2070size_t 2071ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2072{ 2073 if (m_stdio_communication.IsConnected()) 2074 { 2075 ConnectionStatus status; 2076 m_stdio_communication.Write(src, src_len, status, NULL); 2077 } 2078 return 0; 2079} 2080 2081Error 2082ProcessGDBRemote::EnableBreakpointSite (BreakpointSite *bp_site) 2083{ 2084 Error error; 2085 assert (bp_site != NULL); 2086 2087 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2088 user_id_t site_id = bp_site->GetID(); 2089 const addr_t addr = bp_site->GetLoadAddress(); 2090 if (log) 2091 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2092 2093 if (bp_site->IsEnabled()) 2094 { 2095 if (log) 2096 log->Printf ("ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2097 return error; 2098 } 2099 else 2100 { 2101 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2102 2103 if (bp_site->HardwarePreferred()) 2104 { 2105 // Try and set hardware breakpoint, and if that fails, fall through 2106 // and set a software breakpoint? 2107 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2108 { 2109 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2110 { 2111 bp_site->SetEnabled(true); 2112 bp_site->SetType (BreakpointSite::eHardware); 2113 return error; 2114 } 2115 } 2116 } 2117 2118 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2119 { 2120 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2121 { 2122 bp_site->SetEnabled(true); 2123 bp_site->SetType (BreakpointSite::eExternal); 2124 return error; 2125 } 2126 } 2127 2128 return EnableSoftwareBreakpoint (bp_site); 2129 } 2130 2131 if (log) 2132 { 2133 const char *err_string = error.AsCString(); 2134 log->Printf ("ProcessGDBRemote::EnableBreakpointSite () error for breakpoint at 0x%8.8" PRIx64 ": %s", 2135 bp_site->GetLoadAddress(), 2136 err_string ? err_string : "NULL"); 2137 } 2138 // We shouldn't reach here on a successful breakpoint enable... 2139 if (error.Success()) 2140 error.SetErrorToGenericError(); 2141 return error; 2142} 2143 2144Error 2145ProcessGDBRemote::DisableBreakpointSite (BreakpointSite *bp_site) 2146{ 2147 Error error; 2148 assert (bp_site != NULL); 2149 addr_t addr = bp_site->GetLoadAddress(); 2150 user_id_t site_id = bp_site->GetID(); 2151 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2152 if (log) 2153 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2154 2155 if (bp_site->IsEnabled()) 2156 { 2157 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2158 2159 BreakpointSite::Type bp_type = bp_site->GetType(); 2160 switch (bp_type) 2161 { 2162 case BreakpointSite::eSoftware: 2163 error = DisableSoftwareBreakpoint (bp_site); 2164 break; 2165 2166 case BreakpointSite::eHardware: 2167 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2168 error.SetErrorToGenericError(); 2169 break; 2170 2171 case BreakpointSite::eExternal: 2172 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2173 error.SetErrorToGenericError(); 2174 break; 2175 } 2176 if (error.Success()) 2177 bp_site->SetEnabled(false); 2178 } 2179 else 2180 { 2181 if (log) 2182 log->Printf ("ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2183 return error; 2184 } 2185 2186 if (error.Success()) 2187 error.SetErrorToGenericError(); 2188 return error; 2189} 2190 2191// Pre-requisite: wp != NULL. 2192static GDBStoppointType 2193GetGDBStoppointType (Watchpoint *wp) 2194{ 2195 assert(wp); 2196 bool watch_read = wp->WatchpointRead(); 2197 bool watch_write = wp->WatchpointWrite(); 2198 2199 // watch_read and watch_write cannot both be false. 2200 assert(watch_read || watch_write); 2201 if (watch_read && watch_write) 2202 return eWatchpointReadWrite; 2203 else if (watch_read) 2204 return eWatchpointRead; 2205 else // Must be watch_write, then. 2206 return eWatchpointWrite; 2207} 2208 2209Error 2210ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2211{ 2212 Error error; 2213 if (wp) 2214 { 2215 user_id_t watchID = wp->GetID(); 2216 addr_t addr = wp->GetLoadAddress(); 2217 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2218 if (log) 2219 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2220 if (wp->IsEnabled()) 2221 { 2222 if (log) 2223 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2224 return error; 2225 } 2226 2227 GDBStoppointType type = GetGDBStoppointType(wp); 2228 // Pass down an appropriate z/Z packet... 2229 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2230 { 2231 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2232 { 2233 wp->SetEnabled(true, notify); 2234 return error; 2235 } 2236 else 2237 error.SetErrorString("sending gdb watchpoint packet failed"); 2238 } 2239 else 2240 error.SetErrorString("watchpoints not supported"); 2241 } 2242 else 2243 { 2244 error.SetErrorString("Watchpoint argument was NULL."); 2245 } 2246 if (error.Success()) 2247 error.SetErrorToGenericError(); 2248 return error; 2249} 2250 2251Error 2252ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2253{ 2254 Error error; 2255 if (wp) 2256 { 2257 user_id_t watchID = wp->GetID(); 2258 2259 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2260 2261 addr_t addr = wp->GetLoadAddress(); 2262 2263 if (log) 2264 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2265 2266 if (!wp->IsEnabled()) 2267 { 2268 if (log) 2269 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2270 // See also 'class WatchpointSentry' within StopInfo.cpp. 2271 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2272 // the watchpoint object to intelligently process this action. 2273 wp->SetEnabled(false, notify); 2274 return error; 2275 } 2276 2277 if (wp->IsHardware()) 2278 { 2279 GDBStoppointType type = GetGDBStoppointType(wp); 2280 // Pass down an appropriate z/Z packet... 2281 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2282 { 2283 wp->SetEnabled(false, notify); 2284 return error; 2285 } 2286 else 2287 error.SetErrorString("sending gdb watchpoint packet failed"); 2288 } 2289 // TODO: clear software watchpoints if we implement them 2290 } 2291 else 2292 { 2293 error.SetErrorString("Watchpoint argument was NULL."); 2294 } 2295 if (error.Success()) 2296 error.SetErrorToGenericError(); 2297 return error; 2298} 2299 2300void 2301ProcessGDBRemote::Clear() 2302{ 2303 m_flags = 0; 2304 m_thread_list.Clear(); 2305} 2306 2307Error 2308ProcessGDBRemote::DoSignal (int signo) 2309{ 2310 Error error; 2311 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2312 if (log) 2313 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2314 2315 if (!m_gdb_comm.SendAsyncSignal (signo)) 2316 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2317 return error; 2318} 2319 2320Error 2321ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2322{ 2323 ProcessLaunchInfo launch_info; 2324 return StartDebugserverProcess(debugserver_url, launch_info); 2325} 2326 2327Error 2328ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2329{ 2330 Error error; 2331 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2332 { 2333 // If we locate debugserver, keep that located version around 2334 static FileSpec g_debugserver_file_spec; 2335 2336 ProcessLaunchInfo debugserver_launch_info; 2337 char debugserver_path[PATH_MAX]; 2338 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2339 2340 // Always check to see if we have an environment override for the path 2341 // to the debugserver to use and use it if we do. 2342 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2343 if (env_debugserver_path) 2344 debugserver_file_spec.SetFile (env_debugserver_path, false); 2345 else 2346 debugserver_file_spec = g_debugserver_file_spec; 2347 bool debugserver_exists = debugserver_file_spec.Exists(); 2348 if (!debugserver_exists) 2349 { 2350 // The debugserver binary is in the LLDB.framework/Resources 2351 // directory. 2352 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2353 { 2354 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2355 debugserver_exists = debugserver_file_spec.Exists(); 2356 if (debugserver_exists) 2357 { 2358 g_debugserver_file_spec = debugserver_file_spec; 2359 } 2360 else 2361 { 2362 g_debugserver_file_spec.Clear(); 2363 debugserver_file_spec.Clear(); 2364 } 2365 } 2366 } 2367 2368 if (debugserver_exists) 2369 { 2370 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2371 2372 m_stdio_communication.Clear(); 2373 2374 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2375 2376 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2377 char arg_cstr[PATH_MAX]; 2378 2379 // Start args with "debugserver /file/path -r --" 2380 debugserver_args.AppendArgument(debugserver_path); 2381 debugserver_args.AppendArgument(debugserver_url); 2382 // use native registers, not the GDB registers 2383 debugserver_args.AppendArgument("--native-regs"); 2384 // make debugserver run in its own session so signals generated by 2385 // special terminal key sequences (^C) don't affect debugserver 2386 debugserver_args.AppendArgument("--setsid"); 2387 2388 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2389 if (env_debugserver_log_file) 2390 { 2391 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2392 debugserver_args.AppendArgument(arg_cstr); 2393 } 2394 2395 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2396 if (env_debugserver_log_flags) 2397 { 2398 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2399 debugserver_args.AppendArgument(arg_cstr); 2400 } 2401// debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2402// debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2403 2404 // We currently send down all arguments, attach pids, or attach 2405 // process names in dedicated GDB server packets, so we don't need 2406 // to pass them as arguments. This is currently because of all the 2407 // things we need to setup prior to launching: the environment, 2408 // current working dir, file actions, etc. 2409#if 0 2410 // Now append the program arguments 2411 if (inferior_argv) 2412 { 2413 // Terminate the debugserver args so we can now append the inferior args 2414 debugserver_args.AppendArgument("--"); 2415 2416 for (int i = 0; inferior_argv[i] != NULL; ++i) 2417 debugserver_args.AppendArgument (inferior_argv[i]); 2418 } 2419 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2420 { 2421 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2422 debugserver_args.AppendArgument (arg_cstr); 2423 } 2424 else if (attach_name && attach_name[0]) 2425 { 2426 if (wait_for_launch) 2427 debugserver_args.AppendArgument ("--waitfor"); 2428 else 2429 debugserver_args.AppendArgument ("--attach"); 2430 debugserver_args.AppendArgument (attach_name); 2431 } 2432#endif 2433 2434 ProcessLaunchInfo::FileAction file_action; 2435 2436 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2437 // to "/dev/null" if we run into any problems. 2438 file_action.Close (STDIN_FILENO); 2439 debugserver_launch_info.AppendFileAction (file_action); 2440 file_action.Close (STDOUT_FILENO); 2441 debugserver_launch_info.AppendFileAction (file_action); 2442 file_action.Close (STDERR_FILENO); 2443 debugserver_launch_info.AppendFileAction (file_action); 2444 2445 if (log) 2446 { 2447 StreamString strm; 2448 debugserver_args.Dump (&strm); 2449 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2450 } 2451 2452 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2453 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2454 2455 error = Host::LaunchProcess(debugserver_launch_info); 2456 2457 if (error.Success ()) 2458 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2459 else 2460 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2461 2462 if (error.Fail() || log) 2463 error.PutToLog(log, "Host::LaunchProcess (launch_info) => pid=%" PRIu64 ", path='%s'", m_debugserver_pid, debugserver_path); 2464 } 2465 else 2466 { 2467 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2468 } 2469 2470 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2471 StartAsyncThread (); 2472 } 2473 return error; 2474} 2475 2476bool 2477ProcessGDBRemote::MonitorDebugserverProcess 2478( 2479 void *callback_baton, 2480 lldb::pid_t debugserver_pid, 2481 bool exited, // True if the process did exit 2482 int signo, // Zero for no signal 2483 int exit_status // Exit value of process if signal is zero 2484) 2485{ 2486 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2487 // and might not exist anymore, so we need to carefully try to get the 2488 // target for this process first since we have a race condition when 2489 // we are done running between getting the notice that the inferior 2490 // process has died and the debugserver that was debugging this process. 2491 // In our test suite, we are also continually running process after 2492 // process, so we must be very careful to make sure: 2493 // 1 - process object hasn't been deleted already 2494 // 2 - that a new process object hasn't been recreated in its place 2495 2496 // "debugserver_pid" argument passed in is the process ID for 2497 // debugserver that we are tracking... 2498 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2499 2500 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2501 2502 // Get a shared pointer to the target that has a matching process pointer. 2503 // This target could be gone, or the target could already have a new process 2504 // object inside of it 2505 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2506 2507 if (log) 2508 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2509 2510 if (target_sp) 2511 { 2512 // We found a process in a target that matches, but another thread 2513 // might be in the process of launching a new process that will 2514 // soon replace it, so get a shared pointer to the process so we 2515 // can keep it alive. 2516 ProcessSP process_sp (target_sp->GetProcessSP()); 2517 // Now we have a shared pointer to the process that can't go away on us 2518 // so we now make sure it was the same as the one passed in, and also make 2519 // sure that our previous "process *" didn't get deleted and have a new 2520 // "process *" created in its place with the same pointer. To verify this 2521 // we make sure the process has our debugserver process ID. If we pass all 2522 // of these tests, then we are sure that this process is the one we were 2523 // looking for. 2524 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2525 { 2526 // Sleep for a half a second to make sure our inferior process has 2527 // time to set its exit status before we set it incorrectly when 2528 // both the debugserver and the inferior process shut down. 2529 usleep (500000); 2530 // If our process hasn't yet exited, debugserver might have died. 2531 // If the process did exit, the we are reaping it. 2532 const StateType state = process->GetState(); 2533 2534 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2535 state != eStateInvalid && 2536 state != eStateUnloaded && 2537 state != eStateExited && 2538 state != eStateDetached) 2539 { 2540 char error_str[1024]; 2541 if (signo) 2542 { 2543 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2544 if (signal_cstr) 2545 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2546 else 2547 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2548 } 2549 else 2550 { 2551 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2552 } 2553 2554 process->SetExitStatus (-1, error_str); 2555 } 2556 // Debugserver has exited we need to let our ProcessGDBRemote 2557 // know that it no longer has a debugserver instance 2558 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2559 } 2560 } 2561 return true; 2562} 2563 2564void 2565ProcessGDBRemote::KillDebugserverProcess () 2566{ 2567 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2568 { 2569 ::kill (m_debugserver_pid, SIGINT); 2570 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2571 } 2572} 2573 2574void 2575ProcessGDBRemote::Initialize() 2576{ 2577 static bool g_initialized = false; 2578 2579 if (g_initialized == false) 2580 { 2581 g_initialized = true; 2582 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2583 GetPluginDescriptionStatic(), 2584 CreateInstance); 2585 2586 Log::Callbacks log_callbacks = { 2587 ProcessGDBRemoteLog::DisableLog, 2588 ProcessGDBRemoteLog::EnableLog, 2589 ProcessGDBRemoteLog::ListLogCategories 2590 }; 2591 2592 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2593 } 2594} 2595 2596bool 2597ProcessGDBRemote::StartAsyncThread () 2598{ 2599 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2600 2601 if (log) 2602 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2603 2604 Mutex::Locker start_locker(m_async_thread_state_mutex); 2605 if (m_async_thread_state == eAsyncThreadNotStarted) 2606 { 2607 // Create a thread that watches our internal state and controls which 2608 // events make it to clients (into the DCProcess event queue). 2609 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2610 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2611 { 2612 m_async_thread_state = eAsyncThreadRunning; 2613 return true; 2614 } 2615 else 2616 return false; 2617 } 2618 else 2619 { 2620 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2621 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2622 if (log) 2623 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2624 if (m_async_thread_state == eAsyncThreadRunning) 2625 return true; 2626 else 2627 return false; 2628 } 2629} 2630 2631void 2632ProcessGDBRemote::StopAsyncThread () 2633{ 2634 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2635 2636 if (log) 2637 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2638 2639 Mutex::Locker start_locker(m_async_thread_state_mutex); 2640 if (m_async_thread_state == eAsyncThreadRunning) 2641 { 2642 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2643 2644 // This will shut down the async thread. 2645 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2646 2647 // Stop the stdio thread 2648 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2649 { 2650 Host::ThreadJoin (m_async_thread, NULL, NULL); 2651 } 2652 m_async_thread_state = eAsyncThreadDone; 2653 } 2654 else 2655 { 2656 if (log) 2657 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2658 } 2659} 2660 2661 2662void * 2663ProcessGDBRemote::AsyncThread (void *arg) 2664{ 2665 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2666 2667 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2668 if (log) 2669 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2670 2671 Listener listener ("ProcessGDBRemote::AsyncThread"); 2672 EventSP event_sp; 2673 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2674 eBroadcastBitAsyncThreadShouldExit; 2675 2676 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2677 { 2678 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2679 2680 bool done = false; 2681 while (!done) 2682 { 2683 if (log) 2684 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2685 if (listener.WaitForEvent (NULL, event_sp)) 2686 { 2687 const uint32_t event_type = event_sp->GetType(); 2688 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2689 { 2690 if (log) 2691 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2692 2693 switch (event_type) 2694 { 2695 case eBroadcastBitAsyncContinue: 2696 { 2697 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2698 2699 if (continue_packet) 2700 { 2701 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2702 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2703 if (log) 2704 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2705 2706 if (::strstr (continue_cstr, "vAttach") == NULL) 2707 process->SetPrivateState(eStateRunning); 2708 StringExtractorGDBRemote response; 2709 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2710 2711 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2712 // The thread ID list might be contained within the "response", or the stop reply packet that 2713 // caused the stop. So clear it now before we give the stop reply packet to the process 2714 // using the process->SetLastStopPacket()... 2715 process->ClearThreadIDList (); 2716 2717 switch (stop_state) 2718 { 2719 case eStateStopped: 2720 case eStateCrashed: 2721 case eStateSuspended: 2722 process->SetLastStopPacket (response); 2723 process->SetPrivateState (stop_state); 2724 break; 2725 2726 case eStateExited: 2727 process->SetLastStopPacket (response); 2728 process->ClearThreadIDList(); 2729 response.SetFilePos(1); 2730 process->SetExitStatus(response.GetHexU8(), NULL); 2731 done = true; 2732 break; 2733 2734 case eStateInvalid: 2735 process->SetExitStatus(-1, "lost connection"); 2736 break; 2737 2738 default: 2739 process->SetPrivateState (stop_state); 2740 break; 2741 } 2742 } 2743 } 2744 break; 2745 2746 case eBroadcastBitAsyncThreadShouldExit: 2747 if (log) 2748 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2749 done = true; 2750 break; 2751 2752 default: 2753 if (log) 2754 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2755 done = true; 2756 break; 2757 } 2758 } 2759 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2760 { 2761 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2762 { 2763 process->SetExitStatus (-1, "lost connection"); 2764 done = true; 2765 } 2766 } 2767 } 2768 else 2769 { 2770 if (log) 2771 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2772 done = true; 2773 } 2774 } 2775 } 2776 2777 if (log) 2778 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 2779 2780 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2781 return NULL; 2782} 2783 2784const char * 2785ProcessGDBRemote::GetDispatchQueueNameForThread 2786( 2787 addr_t thread_dispatch_qaddr, 2788 std::string &dispatch_queue_name 2789) 2790{ 2791 dispatch_queue_name.clear(); 2792 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2793 { 2794 // Cache the dispatch_queue_offsets_addr value so we don't always have 2795 // to look it up 2796 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2797 { 2798 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2799 const Symbol *dispatch_queue_offsets_symbol = NULL; 2800 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2801 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2802 if (module_sp) 2803 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2804 2805 if (dispatch_queue_offsets_symbol == NULL) 2806 { 2807 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2808 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2809 if (module_sp) 2810 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2811 } 2812 if (dispatch_queue_offsets_symbol) 2813 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2814 2815 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2816 return NULL; 2817 } 2818 2819 uint8_t memory_buffer[8]; 2820 DataExtractor data (memory_buffer, 2821 sizeof(memory_buffer), 2822 m_target.GetArchitecture().GetByteOrder(), 2823 m_target.GetArchitecture().GetAddressByteSize()); 2824 2825 // Excerpt from src/queue_private.h 2826 struct dispatch_queue_offsets_s 2827 { 2828 uint16_t dqo_version; 2829 uint16_t dqo_label; // in version 1-3, offset to string; in version 4+, offset to a pointer to a string 2830 uint16_t dqo_label_size; // in version 1-3, length of string; in version 4+, size of a (void*) in this process 2831 } dispatch_queue_offsets; 2832 2833 2834 Error error; 2835 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2836 { 2837 lldb::offset_t data_offset = 0; 2838 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2839 { 2840 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2841 { 2842 data_offset = 0; 2843 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2844 if (dispatch_queue_offsets.dqo_version >= 4) 2845 { 2846 // libdispatch versions 4+, pointer to dispatch name is in the 2847 // queue structure. 2848 lldb::addr_t pointer_to_label_address = queue_addr + dispatch_queue_offsets.dqo_label; 2849 if (ReadMemory (pointer_to_label_address, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2850 { 2851 data_offset = 0; 2852 lldb::addr_t label_addr = data.GetAddress(&data_offset); 2853 ReadCStringFromMemory (label_addr, dispatch_queue_name, error); 2854 } 2855 } 2856 else 2857 { 2858 // libdispatch versions 1-3, dispatch name is a fixed width char array 2859 // in the queue structure. 2860 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2861 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2862 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2863 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2864 dispatch_queue_name.erase (bytes_read); 2865 } 2866 } 2867 } 2868 } 2869 } 2870 if (dispatch_queue_name.empty()) 2871 return NULL; 2872 return dispatch_queue_name.c_str(); 2873} 2874 2875//uint32_t 2876//ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2877//{ 2878// // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2879// // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2880// if (m_local_debugserver) 2881// { 2882// return Host::ListProcessesMatchingName (name, matches, pids); 2883// } 2884// else 2885// { 2886// // FIXME: Implement talking to the remote debugserver. 2887// return 0; 2888// } 2889// 2890//} 2891// 2892bool 2893ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2894 lldb_private::StoppointCallbackContext *context, 2895 lldb::user_id_t break_id, 2896 lldb::user_id_t break_loc_id) 2897{ 2898 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2899 // run so I can stop it if that's what I want to do. 2900 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2901 if (log) 2902 log->Printf("Hit New Thread Notification breakpoint."); 2903 return false; 2904} 2905 2906 2907bool 2908ProcessGDBRemote::StartNoticingNewThreads() 2909{ 2910 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2911 if (m_thread_create_bp_sp) 2912 { 2913 if (log && log->GetVerbose()) 2914 log->Printf("Enabled noticing new thread breakpoint."); 2915 m_thread_create_bp_sp->SetEnabled(true); 2916 } 2917 else 2918 { 2919 PlatformSP platform_sp (m_target.GetPlatform()); 2920 if (platform_sp) 2921 { 2922 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2923 if (m_thread_create_bp_sp) 2924 { 2925 if (log && log->GetVerbose()) 2926 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2927 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2928 } 2929 else 2930 { 2931 if (log) 2932 log->Printf("Failed to create new thread notification breakpoint."); 2933 } 2934 } 2935 } 2936 return m_thread_create_bp_sp.get() != NULL; 2937} 2938 2939bool 2940ProcessGDBRemote::StopNoticingNewThreads() 2941{ 2942 Log *log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2943 if (log && log->GetVerbose()) 2944 log->Printf ("Disabling new thread notification breakpoint."); 2945 2946 if (m_thread_create_bp_sp) 2947 m_thread_create_bp_sp->SetEnabled(false); 2948 2949 return true; 2950} 2951 2952lldb_private::DynamicLoader * 2953ProcessGDBRemote::GetDynamicLoader () 2954{ 2955 if (m_dyld_ap.get() == NULL) 2956 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, m_dyld_plugin_name.empty() ? NULL : m_dyld_plugin_name.c_str())); 2957 return m_dyld_ap.get(); 2958} 2959 2960 2961class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 2962{ 2963private: 2964 2965public: 2966 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 2967 CommandObjectParsed (interpreter, 2968 "process plugin packet history", 2969 "Dumps the packet history buffer. ", 2970 NULL) 2971 { 2972 } 2973 2974 ~CommandObjectProcessGDBRemotePacketHistory () 2975 { 2976 } 2977 2978 bool 2979 DoExecute (Args& command, CommandReturnObject &result) 2980 { 2981 const size_t argc = command.GetArgumentCount(); 2982 if (argc == 0) 2983 { 2984 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 2985 if (process) 2986 { 2987 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 2988 result.SetStatus (eReturnStatusSuccessFinishResult); 2989 return true; 2990 } 2991 } 2992 else 2993 { 2994 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 2995 } 2996 result.SetStatus (eReturnStatusFailed); 2997 return false; 2998 } 2999}; 3000 3001class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3002{ 3003private: 3004 3005public: 3006 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3007 CommandObjectParsed (interpreter, 3008 "process plugin packet send", 3009 "Send a custom packet through the GDB remote protocol and print the answer. " 3010 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3011 NULL) 3012 { 3013 } 3014 3015 ~CommandObjectProcessGDBRemotePacketSend () 3016 { 3017 } 3018 3019 bool 3020 DoExecute (Args& command, CommandReturnObject &result) 3021 { 3022 const size_t argc = command.GetArgumentCount(); 3023 if (argc == 0) 3024 { 3025 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3026 result.SetStatus (eReturnStatusFailed); 3027 return false; 3028 } 3029 3030 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3031 if (process) 3032 { 3033 for (size_t i=0; i<argc; ++ i) 3034 { 3035 const char *packet_cstr = command.GetArgumentAtIndex(0); 3036 bool send_async = true; 3037 StringExtractorGDBRemote response; 3038 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3039 result.SetStatus (eReturnStatusSuccessFinishResult); 3040 Stream &output_strm = result.GetOutputStream(); 3041 output_strm.Printf (" packet: %s\n", packet_cstr); 3042 std::string &response_str = response.GetStringRef(); 3043 3044 if (strcmp(packet_cstr, "qGetProfileData") == 0) 3045 { 3046 response_str = process->GetGDBRemote().HarmonizeThreadIdsForProfileData(process, response); 3047 } 3048 3049 if (response_str.empty()) 3050 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3051 else 3052 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3053 } 3054 } 3055 return true; 3056 } 3057}; 3058 3059class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw 3060{ 3061private: 3062 3063public: 3064 CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter) : 3065 CommandObjectRaw (interpreter, 3066 "process plugin packet monitor", 3067 "Send a qRcmd packet through the GDB remote protocol and print the response." 3068 "The argument passed to this command will be hex encoded into a valid 'qRcmd' packet, sent and the response will be printed.", 3069 NULL) 3070 { 3071 } 3072 3073 ~CommandObjectProcessGDBRemotePacketMonitor () 3074 { 3075 } 3076 3077 bool 3078 DoExecute (const char *command, CommandReturnObject &result) 3079 { 3080 if (command == NULL || command[0] == '\0') 3081 { 3082 result.AppendErrorWithFormat ("'%s' takes a command string argument", m_cmd_name.c_str()); 3083 result.SetStatus (eReturnStatusFailed); 3084 return false; 3085 } 3086 3087 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3088 if (process) 3089 { 3090 StreamString packet; 3091 packet.PutCString("qRcmd,"); 3092 packet.PutBytesAsRawHex8(command, strlen(command)); 3093 const char *packet_cstr = packet.GetString().c_str(); 3094 3095 bool send_async = true; 3096 StringExtractorGDBRemote response; 3097 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3098 result.SetStatus (eReturnStatusSuccessFinishResult); 3099 Stream &output_strm = result.GetOutputStream(); 3100 output_strm.Printf (" packet: %s\n", packet_cstr); 3101 const std::string &response_str = response.GetStringRef(); 3102 3103 if (response_str.empty()) 3104 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3105 else 3106 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3107 } 3108 return true; 3109 } 3110}; 3111 3112class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3113{ 3114private: 3115 3116public: 3117 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3118 CommandObjectMultiword (interpreter, 3119 "process plugin packet", 3120 "Commands that deal with GDB remote packets.", 3121 NULL) 3122 { 3123 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3124 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3125 LoadSubCommand ("monitor", CommandObjectSP (new CommandObjectProcessGDBRemotePacketMonitor (interpreter))); 3126 } 3127 3128 ~CommandObjectProcessGDBRemotePacket () 3129 { 3130 } 3131}; 3132 3133class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3134{ 3135public: 3136 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3137 CommandObjectMultiword (interpreter, 3138 "process plugin", 3139 "A set of commands for operating on a ProcessGDBRemote process.", 3140 "process plugin <subcommand> [<subcommand-options>]") 3141 { 3142 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3143 } 3144 3145 ~CommandObjectMultiwordProcessGDBRemote () 3146 { 3147 } 3148}; 3149 3150CommandObject * 3151ProcessGDBRemote::GetPluginCommandObject() 3152{ 3153 if (!m_command_sp) 3154 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3155 return m_command_sp.get(); 3156} 3157