1 //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // C Includes 11 #include <errno.h> 12 #include <spawn.h> 13 #include <stdlib.h> 14 #include <netinet/in.h> 15 #include <sys/mman.h> // for mmap 16 #include <sys/stat.h> 17 #include <sys/types.h> 18 #include <time.h> 19 20 // C++ Includes 21 #include <algorithm> 22 #include <map> 23 24 // Other libraries and framework includes 25 26 #include "lldb/Breakpoint/Watchpoint.h" 27 #include "lldb/Interpreter/Args.h" 28 #include "lldb/Core/ArchSpec.h" 29 #include "lldb/Core/Debugger.h" 30 #include "lldb/Core/ConnectionFileDescriptor.h" 31 #include "lldb/Host/FileSpec.h" 32 #include "lldb/Core/InputReader.h" 33 #include "lldb/Core/Module.h" 34 #include "lldb/Core/ModuleSpec.h" 35 #include "lldb/Core/PluginManager.h" 36 #include "lldb/Core/State.h" 37 #include "lldb/Core/StreamFile.h" 38 #include "lldb/Core/StreamString.h" 39 #include "lldb/Core/Timer.h" 40 #include "lldb/Core/Value.h" 41 #include "lldb/Host/Symbols.h" 42 #include "lldb/Host/TimeValue.h" 43 #include "lldb/Interpreter/CommandInterpreter.h" 44 #include "lldb/Interpreter/CommandObject.h" 45 #include "lldb/Interpreter/CommandObjectMultiword.h" 46 #include "lldb/Interpreter/CommandReturnObject.h" 47 #include "lldb/Symbol/ObjectFile.h" 48 #include "lldb/Target/DynamicLoader.h" 49 #include "lldb/Target/Target.h" 50 #include "lldb/Target/TargetList.h" 51 #include "lldb/Target/ThreadPlanCallFunction.h" 52 #include "lldb/Utility/PseudoTerminal.h" 53 54 // Project includes 55 #include "lldb/Host/Host.h" 56 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 57 #include "Plugins/Process/Utility/StopInfoMachException.h" 58 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 59 #include "Utility/StringExtractorGDBRemote.h" 60 #include "GDBRemoteRegisterContext.h" 61 #include "ProcessGDBRemote.h" 62 #include "ProcessGDBRemoteLog.h" 63 #include "ThreadGDBRemote.h" 64 65 #include "Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.h" 66 67 namespace lldb 68 { 69 // Provide a function that can easily dump the packet history if we know a 70 // ProcessGDBRemote * value (which we can get from logs or from debugging). 71 // We need the function in the lldb namespace so it makes it into the final 72 // executable since the LLDB shared library only exports stuff in the lldb 73 // namespace. This allows you to attach with a debugger and call this 74 // function and get the packet history dumped to a file. 75 void 76 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 77 { 78 lldb_private::StreamFile strm; 79 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 80 if (error.Success()) 81 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 82 } 83 } 84 85 86 #define DEBUGSERVER_BASENAME "debugserver" 87 using namespace lldb; 88 using namespace lldb_private; 89 90 static bool rand_initialized = false; 91 92 // TODO Randomly assigning a port is unsafe. We should get an unused 93 // ephemeral port from the kernel and make sure we reserve it before passing 94 // it to debugserver. 95 96 #if defined (__APPLE__) 97 #define LOW_PORT (IPPORT_RESERVED) 98 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 99 #else 100 #define LOW_PORT (1024u) 101 #define HIGH_PORT (49151u) 102 #endif 103 104 static inline uint16_t 105 get_random_port () 106 { 107 if (!rand_initialized) 108 { 109 time_t seed = time(NULL); 110 111 rand_initialized = true; 112 srand(seed); 113 } 114 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 115 } 116 117 118 const char * 119 ProcessGDBRemote::GetPluginNameStatic() 120 { 121 return "gdb-remote"; 122 } 123 124 const char * 125 ProcessGDBRemote::GetPluginDescriptionStatic() 126 { 127 return "GDB Remote protocol based debugging plug-in."; 128 } 129 130 void 131 ProcessGDBRemote::Terminate() 132 { 133 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 134 } 135 136 137 lldb::ProcessSP 138 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 139 { 140 lldb::ProcessSP process_sp; 141 if (crash_file_path == NULL) 142 process_sp.reset (new ProcessGDBRemote (target, listener)); 143 return process_sp; 144 } 145 146 bool 147 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 148 { 149 if (plugin_specified_by_name) 150 return true; 151 152 // For now we are just making sure the file exists for a given module 153 Module *exe_module = target.GetExecutableModulePointer(); 154 if (exe_module) 155 { 156 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 157 // We can't debug core files... 158 switch (exe_objfile->GetType()) 159 { 160 case ObjectFile::eTypeInvalid: 161 case ObjectFile::eTypeCoreFile: 162 case ObjectFile::eTypeDebugInfo: 163 case ObjectFile::eTypeObjectFile: 164 case ObjectFile::eTypeSharedLibrary: 165 case ObjectFile::eTypeStubLibrary: 166 return false; 167 case ObjectFile::eTypeExecutable: 168 case ObjectFile::eTypeDynamicLinker: 169 case ObjectFile::eTypeUnknown: 170 break; 171 } 172 return exe_module->GetFileSpec().Exists(); 173 } 174 // However, if there is no executable module, we return true since we might be preparing to attach. 175 return true; 176 } 177 178 //---------------------------------------------------------------------- 179 // ProcessGDBRemote constructor 180 //---------------------------------------------------------------------- 181 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 182 Process (target, listener), 183 m_flags (0), 184 m_gdb_comm(false), 185 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 186 m_last_stop_packet (), 187 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 188 m_register_info (), 189 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 190 m_async_thread (LLDB_INVALID_HOST_THREAD), 191 m_thread_ids (), 192 m_continue_c_tids (), 193 m_continue_C_tids (), 194 m_continue_s_tids (), 195 m_continue_S_tids (), 196 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 197 m_max_memory_size (512), 198 m_addr_to_mmap_size (), 199 m_thread_create_bp_sp (), 200 m_waiting_for_attach (false), 201 m_destroy_tried_resuming (false), 202 m_dyld_plugin_name(), 203 m_kernel_load_addr (LLDB_INVALID_ADDRESS), 204 m_command_sp () 205 { 206 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 207 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 208 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 209 } 210 211 //---------------------------------------------------------------------- 212 // Destructor 213 //---------------------------------------------------------------------- 214 ProcessGDBRemote::~ProcessGDBRemote() 215 { 216 // m_mach_process.UnregisterNotificationCallbacks (this); 217 Clear(); 218 // We need to call finalize on the process before destroying ourselves 219 // to make sure all of the broadcaster cleanup goes as planned. If we 220 // destruct this class, then Process::~Process() might have problems 221 // trying to fully destroy the broadcaster. 222 Finalize(); 223 } 224 225 //---------------------------------------------------------------------- 226 // PluginInterface 227 //---------------------------------------------------------------------- 228 const char * 229 ProcessGDBRemote::GetPluginName() 230 { 231 return "Process debugging plug-in that uses the GDB remote protocol"; 232 } 233 234 const char * 235 ProcessGDBRemote::GetShortPluginName() 236 { 237 return GetPluginNameStatic(); 238 } 239 240 uint32_t 241 ProcessGDBRemote::GetPluginVersion() 242 { 243 return 1; 244 } 245 246 void 247 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 248 { 249 if (!force && m_register_info.GetNumRegisters() > 0) 250 return; 251 252 char packet[128]; 253 m_register_info.Clear(); 254 uint32_t reg_offset = 0; 255 uint32_t reg_num = 0; 256 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 257 response_type == StringExtractorGDBRemote::eResponse; 258 ++reg_num) 259 { 260 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 261 assert (packet_len < sizeof(packet)); 262 StringExtractorGDBRemote response; 263 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 264 { 265 response_type = response.GetResponseType(); 266 if (response_type == StringExtractorGDBRemote::eResponse) 267 { 268 std::string name; 269 std::string value; 270 ConstString reg_name; 271 ConstString alt_name; 272 ConstString set_name; 273 RegisterInfo reg_info = { NULL, // Name 274 NULL, // Alt name 275 0, // byte size 276 reg_offset, // offset 277 eEncodingUint, // encoding 278 eFormatHex, // formate 279 { 280 LLDB_INVALID_REGNUM, // GCC reg num 281 LLDB_INVALID_REGNUM, // DWARF reg num 282 LLDB_INVALID_REGNUM, // generic reg num 283 reg_num, // GDB reg num 284 reg_num // native register number 285 }, 286 NULL, 287 NULL 288 }; 289 290 while (response.GetNameColonValue(name, value)) 291 { 292 if (name.compare("name") == 0) 293 { 294 reg_name.SetCString(value.c_str()); 295 } 296 else if (name.compare("alt-name") == 0) 297 { 298 alt_name.SetCString(value.c_str()); 299 } 300 else if (name.compare("bitsize") == 0) 301 { 302 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 303 } 304 else if (name.compare("offset") == 0) 305 { 306 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 307 if (reg_offset != offset) 308 { 309 reg_offset = offset; 310 } 311 } 312 else if (name.compare("encoding") == 0) 313 { 314 const Encoding encoding = Args::StringToEncoding (value.c_str()); 315 if (encoding != eEncodingInvalid) 316 reg_info.encoding = encoding; 317 } 318 else if (name.compare("format") == 0) 319 { 320 Format format = eFormatInvalid; 321 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 322 reg_info.format = format; 323 else if (value.compare("binary") == 0) 324 reg_info.format = eFormatBinary; 325 else if (value.compare("decimal") == 0) 326 reg_info.format = eFormatDecimal; 327 else if (value.compare("hex") == 0) 328 reg_info.format = eFormatHex; 329 else if (value.compare("float") == 0) 330 reg_info.format = eFormatFloat; 331 else if (value.compare("vector-sint8") == 0) 332 reg_info.format = eFormatVectorOfSInt8; 333 else if (value.compare("vector-uint8") == 0) 334 reg_info.format = eFormatVectorOfUInt8; 335 else if (value.compare("vector-sint16") == 0) 336 reg_info.format = eFormatVectorOfSInt16; 337 else if (value.compare("vector-uint16") == 0) 338 reg_info.format = eFormatVectorOfUInt16; 339 else if (value.compare("vector-sint32") == 0) 340 reg_info.format = eFormatVectorOfSInt32; 341 else if (value.compare("vector-uint32") == 0) 342 reg_info.format = eFormatVectorOfUInt32; 343 else if (value.compare("vector-float32") == 0) 344 reg_info.format = eFormatVectorOfFloat32; 345 else if (value.compare("vector-uint128") == 0) 346 reg_info.format = eFormatVectorOfUInt128; 347 } 348 else if (name.compare("set") == 0) 349 { 350 set_name.SetCString(value.c_str()); 351 } 352 else if (name.compare("gcc") == 0) 353 { 354 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 355 } 356 else if (name.compare("dwarf") == 0) 357 { 358 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 359 } 360 else if (name.compare("generic") == 0) 361 { 362 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 363 } 364 } 365 366 reg_info.byte_offset = reg_offset; 367 assert (reg_info.byte_size != 0); 368 reg_offset += reg_info.byte_size; 369 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 370 } 371 } 372 else 373 { 374 break; 375 } 376 } 377 378 // We didn't get anything if the accumulated reg_num is zero. See if we are 379 // debugging ARM and fill with a hard coded register set until we can get an 380 // updated debugserver down on the devices. 381 // On the other hand, if the accumulated reg_num is positive, see if we can 382 // add composite registers to the existing primordial ones. 383 bool from_scratch = (reg_num == 0); 384 385 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 386 const ArchSpec &remote_arch = m_gdb_comm.GetHostArchitecture(); 387 if (!target_arch.IsValid()) 388 { 389 if (remote_arch.IsValid() 390 && remote_arch.GetMachine() == llvm::Triple::arm 391 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 392 m_register_info.HardcodeARMRegisters(from_scratch); 393 } 394 else if (target_arch.GetMachine() == llvm::Triple::arm) 395 { 396 m_register_info.HardcodeARMRegisters(from_scratch); 397 } 398 399 // Add some convenience registers (eax, ebx, ecx, edx, esi, edi, ebp, esp) to x86_64. 400 if ((target_arch.IsValid() && target_arch.GetMachine() == llvm::Triple::x86_64) 401 || (remote_arch.IsValid() && remote_arch.GetMachine() == llvm::Triple::x86_64)) 402 m_register_info.Addx86_64ConvenienceRegisters(); 403 404 // At this point, we can finalize our register info. 405 m_register_info.Finalize (); 406 } 407 408 Error 409 ProcessGDBRemote::WillLaunch (Module* module) 410 { 411 return WillLaunchOrAttach (); 412 } 413 414 Error 415 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 416 { 417 return WillLaunchOrAttach (); 418 } 419 420 Error 421 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 422 { 423 return WillLaunchOrAttach (); 424 } 425 426 Error 427 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 428 { 429 Error error (WillLaunchOrAttach ()); 430 431 if (error.Fail()) 432 return error; 433 434 error = ConnectToDebugserver (remote_url); 435 436 if (error.Fail()) 437 return error; 438 StartAsyncThread (); 439 440 CheckForKernel (strm); 441 442 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 443 if (pid == LLDB_INVALID_PROCESS_ID) 444 { 445 // We don't have a valid process ID, so note that we are connected 446 // and could now request to launch or attach, or get remote process 447 // listings... 448 SetPrivateState (eStateConnected); 449 } 450 else 451 { 452 // We have a valid process 453 SetID (pid); 454 GetThreadList(); 455 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 456 { 457 const StateType state = SetThreadStopInfo (m_last_stop_packet); 458 if (state == eStateStopped) 459 { 460 SetPrivateState (state); 461 } 462 else 463 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 464 } 465 else 466 error.SetErrorStringWithFormat ("Process %llu was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 467 } 468 469 if (error.Success() 470 && !GetTarget().GetArchitecture().IsValid() 471 && m_gdb_comm.GetHostArchitecture().IsValid()) 472 { 473 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 474 } 475 476 return error; 477 } 478 479 // When we are establishing a connection to a remote system and we have no executable specified, 480 // or the executable is a kernel, we may be looking at a KASLR situation (where the kernel has been 481 // slid in memory.) 482 // 483 // This function tries to locate the kernel in memory if this is possibly a kernel debug session. 484 // 485 // If a kernel is found, return the address of the kernel in GetImageInfoAddress() -- the 486 // DynamicLoaderDarwinKernel plugin uses this address as the kernel load address and will load the 487 // binary, if needed, along with all the kexts. 488 489 void 490 ProcessGDBRemote::CheckForKernel (Stream *strm) 491 { 492 // early return if this isn't an "unknown" system (kernel debugging doesn't have a system type) 493 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 494 if (!gdb_remote_arch.IsValid() || gdb_remote_arch.GetTriple().getVendor() != llvm::Triple::UnknownVendor) 495 return; 496 497 Module *exe_module = GetTarget().GetExecutableModulePointer(); 498 ObjectFile *exe_objfile = NULL; 499 if (exe_module) 500 exe_objfile = exe_module->GetObjectFile(); 501 502 // early return if we have an executable and it is not a kernel--this is very unlikely to be a kernel debug session. 503 if (exe_objfile 504 && (exe_objfile->GetType() != ObjectFile::eTypeExecutable 505 || exe_objfile->GetStrata() != ObjectFile::eStrataKernel)) 506 return; 507 508 // See if the kernel is in memory at the File address (slide == 0) -- no work needed, if so. 509 if (exe_objfile && exe_objfile->GetHeaderAddress().IsValid()) 510 { 511 ModuleSP memory_module_sp; 512 memory_module_sp = ReadModuleFromMemory (exe_module->GetFileSpec(), exe_objfile->GetHeaderAddress().GetFileAddress(), false, false); 513 if (memory_module_sp.get() 514 && memory_module_sp->GetUUID().IsValid() 515 && memory_module_sp->GetUUID() == exe_module->GetUUID()) 516 { 517 m_kernel_load_addr = exe_objfile->GetHeaderAddress().GetFileAddress(); 518 m_dyld_plugin_name = DynamicLoaderDarwinKernel::GetPluginNameStatic(); 519 SetCanJIT(false); 520 return; 521 } 522 } 523 524 // See if the kernel's load address is stored in the kernel's low globals page; this is 525 // done when a debug boot-arg has been set. 526 527 Error error; 528 uint8_t buf[24]; 529 ModuleSP memory_module_sp; 530 addr_t kernel_addr = LLDB_INVALID_ADDRESS; 531 532 // First try the 32-bit 533 if (memory_module_sp.get() == NULL) 534 { 535 DataExtractor data4 (buf, sizeof(buf), gdb_remote_arch.GetByteOrder(), 4); 536 if (DoReadMemory (0xffff0110, buf, 4, error) == 4) 537 { 538 uint32_t offset = 0; 539 kernel_addr = data4.GetU32(&offset); 540 memory_module_sp = ReadModuleFromMemory (FileSpec("mach_kernel", false), kernel_addr, false, false); 541 if (!memory_module_sp.get() 542 || !memory_module_sp->GetUUID().IsValid() 543 || memory_module_sp->GetObjectFile() == NULL 544 || memory_module_sp->GetObjectFile()->GetType() != ObjectFile::eTypeExecutable 545 || memory_module_sp->GetObjectFile()->GetStrata() != ObjectFile::eStrataKernel) 546 { 547 memory_module_sp.reset(); 548 } 549 } 550 } 551 552 // Now try the 64-bit location 553 if (memory_module_sp.get() == NULL) 554 { 555 DataExtractor data8 (buf, sizeof(buf), gdb_remote_arch.GetByteOrder(), 8); 556 if (DoReadMemory (0xffffff8000002010ULL, buf, 8, error) == 8) 557 { 558 uint32_t offset = 0; 559 kernel_addr = data8.GetU32(&offset); 560 memory_module_sp = ReadModuleFromMemory (FileSpec("mach_kernel", false), kernel_addr, false, false); 561 if (!memory_module_sp.get() 562 || !memory_module_sp->GetUUID().IsValid() 563 || memory_module_sp->GetObjectFile() == NULL 564 || memory_module_sp->GetObjectFile()->GetType() != ObjectFile::eTypeExecutable 565 || memory_module_sp->GetObjectFile()->GetStrata() != ObjectFile::eStrataKernel) 566 { 567 memory_module_sp.reset(); 568 } 569 } 570 } 571 572 if (memory_module_sp.get() 573 && memory_module_sp->GetArchitecture().IsValid() 574 && memory_module_sp->GetArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) 575 { 576 m_kernel_load_addr = kernel_addr; 577 m_dyld_plugin_name = DynamicLoaderDarwinKernel::GetPluginNameStatic(); 578 SetCanJIT(false); 579 return; 580 } 581 } 582 583 Error 584 ProcessGDBRemote::WillLaunchOrAttach () 585 { 586 Error error; 587 m_stdio_communication.Clear (); 588 return error; 589 } 590 591 //---------------------------------------------------------------------- 592 // Process Control 593 //---------------------------------------------------------------------- 594 Error 595 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 596 { 597 Error error; 598 599 uint32_t launch_flags = launch_info.GetFlags().Get(); 600 const char *stdin_path = NULL; 601 const char *stdout_path = NULL; 602 const char *stderr_path = NULL; 603 const char *working_dir = launch_info.GetWorkingDirectory(); 604 605 const ProcessLaunchInfo::FileAction *file_action; 606 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 607 if (file_action) 608 { 609 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 610 stdin_path = file_action->GetPath(); 611 } 612 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 613 if (file_action) 614 { 615 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 616 stdout_path = file_action->GetPath(); 617 } 618 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 619 if (file_action) 620 { 621 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 622 stderr_path = file_action->GetPath(); 623 } 624 625 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 626 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 627 // ::LogSetLogFile ("/dev/stdout"); 628 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 629 630 ObjectFile * object_file = exe_module->GetObjectFile(); 631 if (object_file) 632 { 633 char host_port[128]; 634 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 635 char connect_url[128]; 636 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 637 638 // Make sure we aren't already connected? 639 if (!m_gdb_comm.IsConnected()) 640 { 641 error = StartDebugserverProcess (host_port, launch_info); 642 if (error.Fail()) 643 { 644 if (log) 645 log->Printf("failed to start debugserver process: %s", error.AsCString()); 646 return error; 647 } 648 649 error = ConnectToDebugserver (connect_url); 650 } 651 652 if (error.Success()) 653 { 654 lldb_utility::PseudoTerminal pty; 655 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 656 657 // If the debugserver is local and we aren't disabling STDIO, lets use 658 // a pseudo terminal to instead of relying on the 'O' packets for stdio 659 // since 'O' packets can really slow down debugging if the inferior 660 // does a lot of output. 661 PlatformSP platform_sp (m_target.GetPlatform()); 662 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 663 { 664 const char *slave_name = NULL; 665 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 666 { 667 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 668 slave_name = pty.GetSlaveName (NULL, 0); 669 } 670 if (stdin_path == NULL) 671 stdin_path = slave_name; 672 673 if (stdout_path == NULL) 674 stdout_path = slave_name; 675 676 if (stderr_path == NULL) 677 stderr_path = slave_name; 678 } 679 680 // Set STDIN to /dev/null if we want STDIO disabled or if either 681 // STDOUT or STDERR have been set to something and STDIN hasn't 682 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 683 stdin_path = "/dev/null"; 684 685 // Set STDOUT to /dev/null if we want STDIO disabled or if either 686 // STDIN or STDERR have been set to something and STDOUT hasn't 687 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 688 stdout_path = "/dev/null"; 689 690 // Set STDERR to /dev/null if we want STDIO disabled or if either 691 // STDIN or STDOUT have been set to something and STDERR hasn't 692 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 693 stderr_path = "/dev/null"; 694 695 if (stdin_path) 696 m_gdb_comm.SetSTDIN (stdin_path); 697 if (stdout_path) 698 m_gdb_comm.SetSTDOUT (stdout_path); 699 if (stderr_path) 700 m_gdb_comm.SetSTDERR (stderr_path); 701 702 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 703 704 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 705 706 if (working_dir && working_dir[0]) 707 { 708 m_gdb_comm.SetWorkingDir (working_dir); 709 } 710 711 // Send the environment and the program + arguments after we connect 712 const Args &environment = launch_info.GetEnvironmentEntries(); 713 if (environment.GetArgumentCount()) 714 { 715 size_t num_environment_entries = environment.GetArgumentCount(); 716 for (size_t i=0; i<num_environment_entries; ++i) 717 { 718 const char *env_entry = environment.GetArgumentAtIndex(i); 719 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 720 break; 721 } 722 } 723 724 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 725 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 726 if (arg_packet_err == 0) 727 { 728 std::string error_str; 729 if (m_gdb_comm.GetLaunchSuccess (error_str)) 730 { 731 SetID (m_gdb_comm.GetCurrentProcessID ()); 732 } 733 else 734 { 735 error.SetErrorString (error_str.c_str()); 736 } 737 } 738 else 739 { 740 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 741 } 742 743 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 744 745 if (GetID() == LLDB_INVALID_PROCESS_ID) 746 { 747 if (log) 748 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 749 KillDebugserverProcess (); 750 return error; 751 } 752 753 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 754 { 755 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 756 757 if (!disable_stdio) 758 { 759 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 760 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 761 } 762 } 763 } 764 else 765 { 766 if (log) 767 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 768 } 769 } 770 else 771 { 772 // Set our user ID to an invalid process ID. 773 SetID(LLDB_INVALID_PROCESS_ID); 774 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 775 exe_module->GetFileSpec().GetFilename().AsCString(), 776 exe_module->GetArchitecture().GetArchitectureName()); 777 } 778 return error; 779 780 } 781 782 783 Error 784 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 785 { 786 Error error; 787 // Sleep and wait a bit for debugserver to start to listen... 788 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 789 if (conn_ap.get()) 790 { 791 const uint32_t max_retry_count = 50; 792 uint32_t retry_count = 0; 793 while (!m_gdb_comm.IsConnected()) 794 { 795 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 796 { 797 m_gdb_comm.SetConnection (conn_ap.release()); 798 break; 799 } 800 retry_count++; 801 802 if (retry_count >= max_retry_count) 803 break; 804 805 usleep (100000); 806 } 807 } 808 809 if (!m_gdb_comm.IsConnected()) 810 { 811 if (error.Success()) 812 error.SetErrorString("not connected to remote gdb server"); 813 return error; 814 } 815 816 // We always seem to be able to open a connection to a local port 817 // so we need to make sure we can then send data to it. If we can't 818 // then we aren't actually connected to anything, so try and do the 819 // handshake with the remote GDB server and make sure that goes 820 // alright. 821 if (!m_gdb_comm.HandshakeWithServer (NULL)) 822 { 823 m_gdb_comm.Disconnect(); 824 if (error.Success()) 825 error.SetErrorString("not connected to remote gdb server"); 826 return error; 827 } 828 m_gdb_comm.ResetDiscoverableSettings(); 829 m_gdb_comm.QueryNoAckModeSupported (); 830 m_gdb_comm.GetThreadSuffixSupported (); 831 m_gdb_comm.GetListThreadsInStopReplySupported (); 832 m_gdb_comm.GetHostInfo (); 833 m_gdb_comm.GetVContSupported ('c'); 834 m_gdb_comm.GetVAttachOrWaitSupported(); 835 836 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 837 for (size_t idx = 0; idx < num_cmds; idx++) 838 { 839 StringExtractorGDBRemote response; 840 printf ("Sending command: \%s.\n", GetExtraStartupCommands().GetArgumentAtIndex(idx)); 841 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 842 } 843 return error; 844 } 845 846 void 847 ProcessGDBRemote::DidLaunchOrAttach () 848 { 849 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 850 if (log) 851 log->Printf ("ProcessGDBRemote::DidLaunch()"); 852 if (GetID() != LLDB_INVALID_PROCESS_ID) 853 { 854 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 855 856 BuildDynamicRegisterInfo (false); 857 858 // See if the GDB server supports the qHostInfo information 859 860 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 861 if (gdb_remote_arch.IsValid()) 862 { 863 ArchSpec &target_arch = GetTarget().GetArchitecture(); 864 865 if (target_arch.IsValid()) 866 { 867 // If the remote host is ARM and we have apple as the vendor, then 868 // ARM executables and shared libraries can have mixed ARM architectures. 869 // You can have an armv6 executable, and if the host is armv7, then the 870 // system will load the best possible architecture for all shared libraries 871 // it has, so we really need to take the remote host architecture as our 872 // defacto architecture in this case. 873 874 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 875 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 876 { 877 target_arch = gdb_remote_arch; 878 } 879 else 880 { 881 // Fill in what is missing in the triple 882 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 883 llvm::Triple &target_triple = target_arch.GetTriple(); 884 if (target_triple.getVendorName().size() == 0) 885 { 886 target_triple.setVendor (remote_triple.getVendor()); 887 888 if (target_triple.getOSName().size() == 0) 889 { 890 target_triple.setOS (remote_triple.getOS()); 891 892 if (target_triple.getEnvironmentName().size() == 0) 893 target_triple.setEnvironment (remote_triple.getEnvironment()); 894 } 895 } 896 } 897 } 898 else 899 { 900 // The target doesn't have a valid architecture yet, set it from 901 // the architecture we got from the remote GDB server 902 target_arch = gdb_remote_arch; 903 } 904 } 905 } 906 } 907 908 void 909 ProcessGDBRemote::DidLaunch () 910 { 911 DidLaunchOrAttach (); 912 } 913 914 Error 915 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 916 { 917 ProcessAttachInfo attach_info; 918 return DoAttachToProcessWithID(attach_pid, attach_info); 919 } 920 921 Error 922 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 923 { 924 Error error; 925 // Clear out and clean up from any current state 926 Clear(); 927 if (attach_pid != LLDB_INVALID_PROCESS_ID) 928 { 929 // Make sure we aren't already connected? 930 if (!m_gdb_comm.IsConnected()) 931 { 932 char host_port[128]; 933 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 934 char connect_url[128]; 935 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 936 937 error = StartDebugserverProcess (host_port, attach_info); 938 939 if (error.Fail()) 940 { 941 const char *error_string = error.AsCString(); 942 if (error_string == NULL) 943 error_string = "unable to launch " DEBUGSERVER_BASENAME; 944 945 SetExitStatus (-1, error_string); 946 } 947 else 948 { 949 error = ConnectToDebugserver (connect_url); 950 } 951 } 952 953 if (error.Success()) 954 { 955 char packet[64]; 956 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%llx", attach_pid); 957 SetID (attach_pid); 958 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 959 } 960 } 961 return error; 962 } 963 964 size_t 965 ProcessGDBRemote::AttachInputReaderCallback 966 ( 967 void *baton, 968 InputReader *reader, 969 lldb::InputReaderAction notification, 970 const char *bytes, 971 size_t bytes_len 972 ) 973 { 974 if (notification == eInputReaderGotToken) 975 { 976 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 977 if (gdb_process->m_waiting_for_attach) 978 gdb_process->m_waiting_for_attach = false; 979 reader->SetIsDone(true); 980 return 1; 981 } 982 return 0; 983 } 984 985 Error 986 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 987 { 988 Error error; 989 // Clear out and clean up from any current state 990 Clear(); 991 992 if (process_name && process_name[0]) 993 { 994 // Make sure we aren't already connected? 995 if (!m_gdb_comm.IsConnected()) 996 { 997 char host_port[128]; 998 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 999 char connect_url[128]; 1000 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 1001 1002 error = StartDebugserverProcess (host_port, attach_info); 1003 if (error.Fail()) 1004 { 1005 const char *error_string = error.AsCString(); 1006 if (error_string == NULL) 1007 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1008 1009 SetExitStatus (-1, error_string); 1010 } 1011 else 1012 { 1013 error = ConnectToDebugserver (connect_url); 1014 } 1015 } 1016 1017 if (error.Success()) 1018 { 1019 StreamString packet; 1020 1021 if (wait_for_launch) 1022 { 1023 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1024 { 1025 packet.PutCString ("vAttachWait"); 1026 } 1027 else 1028 { 1029 if (attach_info.GetIgnoreExisting()) 1030 packet.PutCString("vAttachWait"); 1031 else 1032 packet.PutCString ("vAttachOrWait"); 1033 } 1034 } 1035 else 1036 packet.PutCString("vAttachName"); 1037 packet.PutChar(';'); 1038 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1039 1040 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1041 1042 } 1043 } 1044 return error; 1045 } 1046 1047 1048 void 1049 ProcessGDBRemote::DidAttach () 1050 { 1051 DidLaunchOrAttach (); 1052 } 1053 1054 Error 1055 ProcessGDBRemote::WillResume () 1056 { 1057 m_continue_c_tids.clear(); 1058 m_continue_C_tids.clear(); 1059 m_continue_s_tids.clear(); 1060 m_continue_S_tids.clear(); 1061 return Error(); 1062 } 1063 1064 Error 1065 ProcessGDBRemote::DoResume () 1066 { 1067 Error error; 1068 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1069 if (log) 1070 log->Printf ("ProcessGDBRemote::Resume()"); 1071 1072 Listener listener ("gdb-remote.resume-packet-sent"); 1073 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1074 { 1075 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1076 1077 StreamString continue_packet; 1078 bool continue_packet_error = false; 1079 if (m_gdb_comm.HasAnyVContSupport ()) 1080 { 1081 continue_packet.PutCString ("vCont"); 1082 1083 if (!m_continue_c_tids.empty()) 1084 { 1085 if (m_gdb_comm.GetVContSupported ('c')) 1086 { 1087 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) 1088 continue_packet.Printf(";c:%4.4llx", *t_pos); 1089 } 1090 else 1091 continue_packet_error = true; 1092 } 1093 1094 if (!continue_packet_error && !m_continue_C_tids.empty()) 1095 { 1096 if (m_gdb_comm.GetVContSupported ('C')) 1097 { 1098 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) 1099 continue_packet.Printf(";C%2.2x:%4.4llx", s_pos->second, s_pos->first); 1100 } 1101 else 1102 continue_packet_error = true; 1103 } 1104 1105 if (!continue_packet_error && !m_continue_s_tids.empty()) 1106 { 1107 if (m_gdb_comm.GetVContSupported ('s')) 1108 { 1109 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) 1110 continue_packet.Printf(";s:%4.4llx", *t_pos); 1111 } 1112 else 1113 continue_packet_error = true; 1114 } 1115 1116 if (!continue_packet_error && !m_continue_S_tids.empty()) 1117 { 1118 if (m_gdb_comm.GetVContSupported ('S')) 1119 { 1120 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) 1121 continue_packet.Printf(";S%2.2x:%4.4llx", s_pos->second, s_pos->first); 1122 } 1123 else 1124 continue_packet_error = true; 1125 } 1126 1127 if (continue_packet_error) 1128 continue_packet.GetString().clear(); 1129 } 1130 else 1131 continue_packet_error = true; 1132 1133 if (continue_packet_error) 1134 { 1135 // Either no vCont support, or we tried to use part of the vCont 1136 // packet that wasn't supported by the remote GDB server. 1137 // We need to try and make a simple packet that can do our continue 1138 const size_t num_threads = GetThreadList().GetSize(); 1139 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1140 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1141 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1142 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1143 if (num_continue_c_tids > 0) 1144 { 1145 if (num_continue_c_tids == num_threads) 1146 { 1147 // All threads are resuming... 1148 m_gdb_comm.SetCurrentThreadForRun (-1); 1149 continue_packet.PutChar ('c'); 1150 continue_packet_error = false; 1151 } 1152 else if (num_continue_c_tids == 1 && 1153 num_continue_C_tids == 0 && 1154 num_continue_s_tids == 0 && 1155 num_continue_S_tids == 0 ) 1156 { 1157 // Only one thread is continuing 1158 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1159 continue_packet.PutChar ('c'); 1160 continue_packet_error = false; 1161 } 1162 } 1163 1164 if (continue_packet_error && num_continue_C_tids > 0) 1165 { 1166 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1167 num_continue_C_tids > 0 && 1168 num_continue_s_tids == 0 && 1169 num_continue_S_tids == 0 ) 1170 { 1171 const int continue_signo = m_continue_C_tids.front().second; 1172 // Only one thread is continuing 1173 if (num_continue_C_tids > 1) 1174 { 1175 // More that one thread with a signal, yet we don't have 1176 // vCont support and we are being asked to resume each 1177 // thread with a signal, we need to make sure they are 1178 // all the same signal, or we can't issue the continue 1179 // accurately with the current support... 1180 if (num_continue_C_tids > 1) 1181 { 1182 continue_packet_error = false; 1183 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1184 { 1185 if (m_continue_C_tids[i].second != continue_signo) 1186 continue_packet_error = true; 1187 } 1188 } 1189 if (!continue_packet_error) 1190 m_gdb_comm.SetCurrentThreadForRun (-1); 1191 } 1192 else 1193 { 1194 // Set the continue thread ID 1195 continue_packet_error = false; 1196 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1197 } 1198 if (!continue_packet_error) 1199 { 1200 // Add threads continuing with the same signo... 1201 continue_packet.Printf("C%2.2x", continue_signo); 1202 } 1203 } 1204 } 1205 1206 if (continue_packet_error && num_continue_s_tids > 0) 1207 { 1208 if (num_continue_s_tids == num_threads) 1209 { 1210 // All threads are resuming... 1211 m_gdb_comm.SetCurrentThreadForRun (-1); 1212 continue_packet.PutChar ('s'); 1213 continue_packet_error = false; 1214 } 1215 else if (num_continue_c_tids == 0 && 1216 num_continue_C_tids == 0 && 1217 num_continue_s_tids == 1 && 1218 num_continue_S_tids == 0 ) 1219 { 1220 // Only one thread is stepping 1221 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1222 continue_packet.PutChar ('s'); 1223 continue_packet_error = false; 1224 } 1225 } 1226 1227 if (!continue_packet_error && num_continue_S_tids > 0) 1228 { 1229 if (num_continue_S_tids == num_threads) 1230 { 1231 const int step_signo = m_continue_S_tids.front().second; 1232 // Are all threads trying to step with the same signal? 1233 continue_packet_error = false; 1234 if (num_continue_S_tids > 1) 1235 { 1236 for (size_t i=1; i<num_threads; ++i) 1237 { 1238 if (m_continue_S_tids[i].second != step_signo) 1239 continue_packet_error = true; 1240 } 1241 } 1242 if (!continue_packet_error) 1243 { 1244 // Add threads stepping with the same signo... 1245 m_gdb_comm.SetCurrentThreadForRun (-1); 1246 continue_packet.Printf("S%2.2x", step_signo); 1247 } 1248 } 1249 else if (num_continue_c_tids == 0 && 1250 num_continue_C_tids == 0 && 1251 num_continue_s_tids == 0 && 1252 num_continue_S_tids == 1 ) 1253 { 1254 // Only one thread is stepping with signal 1255 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1256 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1257 continue_packet_error = false; 1258 } 1259 } 1260 } 1261 1262 if (continue_packet_error) 1263 { 1264 error.SetErrorString ("can't make continue packet for this resume"); 1265 } 1266 else 1267 { 1268 EventSP event_sp; 1269 TimeValue timeout; 1270 timeout = TimeValue::Now(); 1271 timeout.OffsetWithSeconds (5); 1272 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1273 { 1274 error.SetErrorString ("Trying to resume but the async thread is dead."); 1275 if (log) 1276 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1277 return error; 1278 } 1279 1280 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1281 1282 if (listener.WaitForEvent (&timeout, event_sp) == false) 1283 { 1284 error.SetErrorString("Resume timed out."); 1285 if (log) 1286 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1287 } 1288 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1289 { 1290 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1291 if (log) 1292 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1293 return error; 1294 } 1295 } 1296 } 1297 1298 return error; 1299 } 1300 1301 void 1302 ProcessGDBRemote::ClearThreadIDList () 1303 { 1304 Mutex::Locker locker(m_thread_list.GetMutex()); 1305 m_thread_ids.clear(); 1306 } 1307 1308 bool 1309 ProcessGDBRemote::UpdateThreadIDList () 1310 { 1311 Mutex::Locker locker(m_thread_list.GetMutex()); 1312 bool sequence_mutex_unavailable = false; 1313 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1314 if (sequence_mutex_unavailable) 1315 { 1316 return false; // We just didn't get the list 1317 } 1318 return true; 1319 } 1320 1321 bool 1322 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1323 { 1324 // locker will keep a mutex locked until it goes out of scope 1325 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1326 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1327 log->Printf ("ProcessGDBRemote::%s (pid = %llu)", __FUNCTION__, GetID()); 1328 1329 size_t num_thread_ids = m_thread_ids.size(); 1330 // The "m_thread_ids" thread ID list should always be updated after each stop 1331 // reply packet, but in case it isn't, update it here. 1332 if (num_thread_ids == 0) 1333 { 1334 if (!UpdateThreadIDList ()) 1335 return false; 1336 num_thread_ids = m_thread_ids.size(); 1337 } 1338 1339 if (num_thread_ids > 0) 1340 { 1341 for (size_t i=0; i<num_thread_ids; ++i) 1342 { 1343 tid_t tid = m_thread_ids[i]; 1344 ThreadSP thread_sp (old_thread_list.FindThreadByID (tid, false)); 1345 if (!thread_sp) 1346 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1347 new_thread_list.AddThread(thread_sp); 1348 } 1349 } 1350 1351 return true; 1352 } 1353 1354 1355 StateType 1356 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1357 { 1358 stop_packet.SetFilePos (0); 1359 const char stop_type = stop_packet.GetChar(); 1360 switch (stop_type) 1361 { 1362 case 'T': 1363 case 'S': 1364 { 1365 if (GetStopID() == 0) 1366 { 1367 // Our first stop, make sure we have a process ID, and also make 1368 // sure we know about our registers 1369 if (GetID() == LLDB_INVALID_PROCESS_ID) 1370 { 1371 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1372 if (pid != LLDB_INVALID_PROCESS_ID) 1373 SetID (pid); 1374 } 1375 BuildDynamicRegisterInfo (true); 1376 } 1377 // Stop with signal and thread info 1378 const uint8_t signo = stop_packet.GetHexU8(); 1379 std::string name; 1380 std::string value; 1381 std::string thread_name; 1382 std::string reason; 1383 std::string description; 1384 uint32_t exc_type = 0; 1385 std::vector<addr_t> exc_data; 1386 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1387 ThreadSP thread_sp; 1388 1389 while (stop_packet.GetNameColonValue(name, value)) 1390 { 1391 if (name.compare("metype") == 0) 1392 { 1393 // exception type in big endian hex 1394 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1395 } 1396 else if (name.compare("medata") == 0) 1397 { 1398 // exception data in big endian hex 1399 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1400 } 1401 else if (name.compare("thread") == 0) 1402 { 1403 // thread in big endian hex 1404 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1405 // m_thread_list does have its own mutex, but we need to 1406 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1407 // and the m_thread_list.AddThread(...) so it doesn't change on us 1408 Mutex::Locker locker (m_thread_list.GetMutex ()); 1409 thread_sp = m_thread_list.FindThreadByID(tid, false); 1410 if (!thread_sp) 1411 { 1412 // Create the thread if we need to 1413 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1414 m_thread_list.AddThread(thread_sp); 1415 } 1416 } 1417 else if (name.compare("threads") == 0) 1418 { 1419 Mutex::Locker locker(m_thread_list.GetMutex()); 1420 m_thread_ids.clear(); 1421 // A comma separated list of all threads in the current 1422 // process that includes the thread for this stop reply 1423 // packet 1424 size_t comma_pos; 1425 lldb::tid_t tid; 1426 while ((comma_pos = value.find(',')) != std::string::npos) 1427 { 1428 value[comma_pos] = '\0'; 1429 // thread in big endian hex 1430 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1431 if (tid != LLDB_INVALID_THREAD_ID) 1432 m_thread_ids.push_back (tid); 1433 value.erase(0, comma_pos + 1); 1434 1435 } 1436 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1437 if (tid != LLDB_INVALID_THREAD_ID) 1438 m_thread_ids.push_back (tid); 1439 } 1440 else if (name.compare("hexname") == 0) 1441 { 1442 StringExtractor name_extractor; 1443 // Swap "value" over into "name_extractor" 1444 name_extractor.GetStringRef().swap(value); 1445 // Now convert the HEX bytes into a string value 1446 name_extractor.GetHexByteString (value); 1447 thread_name.swap (value); 1448 } 1449 else if (name.compare("name") == 0) 1450 { 1451 thread_name.swap (value); 1452 } 1453 else if (name.compare("qaddr") == 0) 1454 { 1455 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1456 } 1457 else if (name.compare("reason") == 0) 1458 { 1459 reason.swap(value); 1460 } 1461 else if (name.compare("description") == 0) 1462 { 1463 StringExtractor desc_extractor; 1464 // Swap "value" over into "name_extractor" 1465 desc_extractor.GetStringRef().swap(value); 1466 // Now convert the HEX bytes into a string value 1467 desc_extractor.GetHexByteString (thread_name); 1468 } 1469 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1470 { 1471 // We have a register number that contains an expedited 1472 // register value. Lets supply this register to our thread 1473 // so it won't have to go and read it. 1474 if (thread_sp) 1475 { 1476 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1477 1478 if (reg != UINT32_MAX) 1479 { 1480 StringExtractor reg_value_extractor; 1481 // Swap "value" over into "reg_value_extractor" 1482 reg_value_extractor.GetStringRef().swap(value); 1483 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1484 { 1485 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1486 name.c_str(), 1487 reg, 1488 reg, 1489 reg_value_extractor.GetStringRef().c_str(), 1490 stop_packet.GetStringRef().c_str()); 1491 } 1492 } 1493 } 1494 } 1495 } 1496 1497 if (thread_sp) 1498 { 1499 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1500 1501 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1502 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1503 if (exc_type != 0) 1504 { 1505 const size_t exc_data_size = exc_data.size(); 1506 1507 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1508 exc_type, 1509 exc_data_size, 1510 exc_data_size >= 1 ? exc_data[0] : 0, 1511 exc_data_size >= 2 ? exc_data[1] : 0, 1512 exc_data_size >= 3 ? exc_data[2] : 0)); 1513 } 1514 else 1515 { 1516 bool handled = false; 1517 if (!reason.empty()) 1518 { 1519 if (reason.compare("trace") == 0) 1520 { 1521 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1522 handled = true; 1523 } 1524 else if (reason.compare("breakpoint") == 0) 1525 { 1526 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1527 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1528 if (bp_site_sp) 1529 { 1530 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1531 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1532 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1533 handled = true; 1534 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1535 { 1536 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1537 } 1538 else 1539 { 1540 StopInfoSP invalid_stop_info_sp; 1541 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1542 } 1543 } 1544 1545 } 1546 else if (reason.compare("trap") == 0) 1547 { 1548 // Let the trap just use the standard signal stop reason below... 1549 } 1550 else if (reason.compare("watchpoint") == 0) 1551 { 1552 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1553 // TODO: locate the watchpoint somehow... 1554 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1555 handled = true; 1556 } 1557 else if (reason.compare("exception") == 0) 1558 { 1559 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1560 handled = true; 1561 } 1562 } 1563 1564 if (signo) 1565 { 1566 if (signo == SIGTRAP) 1567 { 1568 // Currently we are going to assume SIGTRAP means we are either 1569 // hitting a breakpoint or hardware single stepping. 1570 handled = true; 1571 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1572 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1573 1574 if (bp_site_sp) 1575 { 1576 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1577 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1578 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1579 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1580 { 1581 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1582 } 1583 else 1584 { 1585 StopInfoSP invalid_stop_info_sp; 1586 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1587 } 1588 } 1589 else 1590 { 1591 // If we were stepping then assume the stop was the result of the trace. If we were 1592 // not stepping then report the SIGTRAP. 1593 // FIXME: We are still missing the case where we single step over a trap instruction. 1594 if (gdb_thread->GetTemporaryResumeState() == eStateStepping) 1595 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1596 else 1597 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1598 } 1599 } 1600 if (!handled) 1601 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1602 } 1603 else 1604 { 1605 StopInfoSP invalid_stop_info_sp; 1606 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1607 } 1608 1609 if (!description.empty()) 1610 { 1611 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1612 if (stop_info_sp) 1613 { 1614 stop_info_sp->SetDescription (description.c_str()); 1615 } 1616 else 1617 { 1618 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1619 } 1620 } 1621 } 1622 } 1623 return eStateStopped; 1624 } 1625 break; 1626 1627 case 'W': 1628 // process exited 1629 return eStateExited; 1630 1631 default: 1632 break; 1633 } 1634 return eStateInvalid; 1635 } 1636 1637 void 1638 ProcessGDBRemote::RefreshStateAfterStop () 1639 { 1640 Mutex::Locker locker(m_thread_list.GetMutex()); 1641 m_thread_ids.clear(); 1642 // Set the thread stop info. It might have a "threads" key whose value is 1643 // a list of all thread IDs in the current process, so m_thread_ids might 1644 // get set. 1645 SetThreadStopInfo (m_last_stop_packet); 1646 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1647 if (m_thread_ids.empty()) 1648 { 1649 // No, we need to fetch the thread list manually 1650 UpdateThreadIDList(); 1651 } 1652 1653 // Let all threads recover from stopping and do any clean up based 1654 // on the previous thread state (if any). 1655 m_thread_list.RefreshStateAfterStop(); 1656 1657 } 1658 1659 Error 1660 ProcessGDBRemote::DoHalt (bool &caused_stop) 1661 { 1662 Error error; 1663 1664 bool timed_out = false; 1665 Mutex::Locker locker; 1666 1667 if (m_public_state.GetValue() == eStateAttaching) 1668 { 1669 // We are being asked to halt during an attach. We need to just close 1670 // our file handle and debugserver will go away, and we can be done... 1671 m_gdb_comm.Disconnect(); 1672 } 1673 else 1674 { 1675 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1676 { 1677 if (timed_out) 1678 error.SetErrorString("timed out sending interrupt packet"); 1679 else 1680 error.SetErrorString("unknown error sending interrupt packet"); 1681 } 1682 1683 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1684 } 1685 return error; 1686 } 1687 1688 Error 1689 ProcessGDBRemote::InterruptIfRunning 1690 ( 1691 bool discard_thread_plans, 1692 bool catch_stop_event, 1693 EventSP &stop_event_sp 1694 ) 1695 { 1696 Error error; 1697 1698 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1699 1700 bool paused_private_state_thread = false; 1701 const bool is_running = m_gdb_comm.IsRunning(); 1702 if (log) 1703 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1704 discard_thread_plans, 1705 catch_stop_event, 1706 is_running); 1707 1708 if (discard_thread_plans) 1709 { 1710 if (log) 1711 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1712 m_thread_list.DiscardThreadPlans(); 1713 } 1714 if (is_running) 1715 { 1716 if (catch_stop_event) 1717 { 1718 if (log) 1719 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1720 PausePrivateStateThread(); 1721 paused_private_state_thread = true; 1722 } 1723 1724 bool timed_out = false; 1725 Mutex::Locker locker; 1726 1727 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1728 { 1729 if (timed_out) 1730 error.SetErrorString("timed out sending interrupt packet"); 1731 else 1732 error.SetErrorString("unknown error sending interrupt packet"); 1733 if (paused_private_state_thread) 1734 ResumePrivateStateThread(); 1735 return error; 1736 } 1737 1738 if (catch_stop_event) 1739 { 1740 // LISTEN HERE 1741 TimeValue timeout_time; 1742 timeout_time = TimeValue::Now(); 1743 timeout_time.OffsetWithSeconds(5); 1744 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1745 1746 timed_out = state == eStateInvalid; 1747 if (log) 1748 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1749 1750 if (timed_out) 1751 error.SetErrorString("unable to verify target stopped"); 1752 } 1753 1754 if (paused_private_state_thread) 1755 { 1756 if (log) 1757 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1758 ResumePrivateStateThread(); 1759 } 1760 } 1761 return error; 1762 } 1763 1764 Error 1765 ProcessGDBRemote::WillDetach () 1766 { 1767 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1768 if (log) 1769 log->Printf ("ProcessGDBRemote::WillDetach()"); 1770 1771 bool discard_thread_plans = true; 1772 bool catch_stop_event = true; 1773 EventSP event_sp; 1774 1775 // FIXME: InterruptIfRunning should be done in the Process base class, or better still make Halt do what is 1776 // needed. This shouldn't be a feature of a particular plugin. 1777 1778 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1779 } 1780 1781 Error 1782 ProcessGDBRemote::DoDetach() 1783 { 1784 Error error; 1785 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1786 if (log) 1787 log->Printf ("ProcessGDBRemote::DoDetach()"); 1788 1789 DisableAllBreakpointSites (); 1790 1791 m_thread_list.DiscardThreadPlans(); 1792 1793 bool success = m_gdb_comm.Detach (); 1794 if (log) 1795 { 1796 if (success) 1797 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1798 else 1799 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1800 } 1801 // Sleep for one second to let the process get all detached... 1802 StopAsyncThread (); 1803 1804 SetPrivateState (eStateDetached); 1805 ResumePrivateStateThread(); 1806 1807 //KillDebugserverProcess (); 1808 return error; 1809 } 1810 1811 1812 Error 1813 ProcessGDBRemote::DoDestroy () 1814 { 1815 Error error; 1816 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1817 if (log) 1818 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1819 1820 // There is a bug in older iOS debugservers where they don't shut down the process 1821 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1822 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1823 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1824 // destroy it again. 1825 // 1826 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1827 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1828 // the debugservers with this bug are equal. There really should be a better way to test this! 1829 // 1830 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1831 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1832 // just do the straight-forward kill. 1833 // 1834 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1835 // necessary (or helpful) to do any of this. 1836 1837 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1838 { 1839 PlatformSP platform_sp = GetTarget().GetPlatform(); 1840 1841 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1842 if (platform_sp 1843 && platform_sp->GetName() 1844 && strcmp (platform_sp->GetName(), PlatformRemoteiOS::GetShortPluginNameStatic()) == 0) 1845 { 1846 if (m_destroy_tried_resuming) 1847 { 1848 if (log) 1849 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1850 } 1851 else 1852 { 1853 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1854 // but we really need it to happen here and it doesn't matter if we do it twice. 1855 m_thread_list.DiscardThreadPlans(); 1856 DisableAllBreakpointSites(); 1857 1858 bool stop_looks_like_crash = false; 1859 ThreadList &threads = GetThreadList(); 1860 1861 { 1862 Mutex::Locker locker(threads.GetMutex()); 1863 1864 size_t num_threads = threads.GetSize(); 1865 for (size_t i = 0; i < num_threads; i++) 1866 { 1867 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1868 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1869 StopReason reason = eStopReasonInvalid; 1870 if (stop_info_sp) 1871 reason = stop_info_sp->GetStopReason(); 1872 if (reason == eStopReasonBreakpoint 1873 || reason == eStopReasonException) 1874 { 1875 if (log) 1876 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: %lld stopped with reason: %s.", 1877 thread_sp->GetID(), 1878 stop_info_sp->GetDescription()); 1879 stop_looks_like_crash = true; 1880 break; 1881 } 1882 } 1883 } 1884 1885 if (stop_looks_like_crash) 1886 { 1887 if (log) 1888 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1889 m_destroy_tried_resuming = true; 1890 1891 // If we are going to run again before killing, it would be good to suspend all the threads 1892 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1893 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1894 // have to run the risk of letting those threads proceed a bit. 1895 1896 { 1897 Mutex::Locker locker(threads.GetMutex()); 1898 1899 size_t num_threads = threads.GetSize(); 1900 for (size_t i = 0; i < num_threads; i++) 1901 { 1902 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1903 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1904 StopReason reason = eStopReasonInvalid; 1905 if (stop_info_sp) 1906 reason = stop_info_sp->GetStopReason(); 1907 if (reason != eStopReasonBreakpoint 1908 && reason != eStopReasonException) 1909 { 1910 if (log) 1911 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: %lld before running.", 1912 thread_sp->GetID()); 1913 thread_sp->SetResumeState(eStateSuspended); 1914 } 1915 } 1916 } 1917 Resume (); 1918 return Destroy(); 1919 } 1920 } 1921 } 1922 } 1923 1924 // Interrupt if our inferior is running... 1925 int exit_status = SIGABRT; 1926 std::string exit_string; 1927 1928 if (m_gdb_comm.IsConnected()) 1929 { 1930 if (m_public_state.GetValue() != eStateAttaching) 1931 { 1932 1933 StringExtractorGDBRemote response; 1934 bool send_async = true; 1935 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 1936 1937 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1938 { 1939 char packet_cmd = response.GetChar(0); 1940 1941 if (packet_cmd == 'W' || packet_cmd == 'X') 1942 { 1943 SetLastStopPacket (response); 1944 ClearThreadIDList (); 1945 exit_status = response.GetHexU8(); 1946 } 1947 else 1948 { 1949 if (log) 1950 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 1951 exit_string.assign("got unexpected response to k packet: "); 1952 exit_string.append(response.GetStringRef()); 1953 } 1954 } 1955 else 1956 { 1957 if (log) 1958 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1959 exit_string.assign("failed to send the k packet"); 1960 } 1961 1962 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 1963 } 1964 else 1965 { 1966 if (log) 1967 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 1968 exit_string.assign ("killed or interrupted while attaching."); 1969 } 1970 } 1971 else 1972 { 1973 // If we missed setting the exit status on the way out, do it here. 1974 // NB set exit status can be called multiple times, the first one sets the status. 1975 exit_string.assign("destroying when not connected to debugserver"); 1976 } 1977 1978 SetExitStatus(exit_status, exit_string.c_str()); 1979 1980 StopAsyncThread (); 1981 KillDebugserverProcess (); 1982 return error; 1983 } 1984 1985 //------------------------------------------------------------------ 1986 // Process Queries 1987 //------------------------------------------------------------------ 1988 1989 bool 1990 ProcessGDBRemote::IsAlive () 1991 { 1992 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 1993 } 1994 1995 // For kernel debugging, we return the load address of the kernel binary as the 1996 // ImageInfoAddress and we return the DynamicLoaderDarwinKernel as the GetDynamicLoader() 1997 // name so the correct DynamicLoader plugin is chosen. 1998 addr_t 1999 ProcessGDBRemote::GetImageInfoAddress() 2000 { 2001 if (m_kernel_load_addr != LLDB_INVALID_ADDRESS) 2002 return m_kernel_load_addr; 2003 else 2004 return m_gdb_comm.GetShlibInfoAddr(); 2005 } 2006 2007 //------------------------------------------------------------------ 2008 // Process Memory 2009 //------------------------------------------------------------------ 2010 size_t 2011 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2012 { 2013 if (size > m_max_memory_size) 2014 { 2015 // Keep memory read sizes down to a sane limit. This function will be 2016 // called multiple times in order to complete the task by 2017 // lldb_private::Process so it is ok to do this. 2018 size = m_max_memory_size; 2019 } 2020 2021 char packet[64]; 2022 const int packet_len = ::snprintf (packet, sizeof(packet), "m%llx,%llx", (uint64_t)addr, (uint64_t)size); 2023 assert (packet_len + 1 < sizeof(packet)); 2024 StringExtractorGDBRemote response; 2025 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 2026 { 2027 if (response.IsNormalResponse()) 2028 { 2029 error.Clear(); 2030 return response.GetHexBytes(buf, size, '\xdd'); 2031 } 2032 else if (response.IsErrorResponse()) 2033 error.SetErrorString("memory read failed"); 2034 else if (response.IsUnsupportedResponse()) 2035 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2036 else 2037 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2038 } 2039 else 2040 { 2041 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 2042 } 2043 return 0; 2044 } 2045 2046 size_t 2047 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2048 { 2049 if (size > m_max_memory_size) 2050 { 2051 // Keep memory read sizes down to a sane limit. This function will be 2052 // called multiple times in order to complete the task by 2053 // lldb_private::Process so it is ok to do this. 2054 size = m_max_memory_size; 2055 } 2056 2057 StreamString packet; 2058 packet.Printf("M%llx,%llx:", addr, (uint64_t)size); 2059 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2060 StringExtractorGDBRemote response; 2061 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 2062 { 2063 if (response.IsOKResponse()) 2064 { 2065 error.Clear(); 2066 return size; 2067 } 2068 else if (response.IsErrorResponse()) 2069 error.SetErrorString("memory write failed"); 2070 else if (response.IsUnsupportedResponse()) 2071 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2072 else 2073 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2074 } 2075 else 2076 { 2077 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 2078 } 2079 return 0; 2080 } 2081 2082 lldb::addr_t 2083 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2084 { 2085 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2086 2087 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2088 switch (supported) 2089 { 2090 case eLazyBoolCalculate: 2091 case eLazyBoolYes: 2092 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2093 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2094 return allocated_addr; 2095 2096 case eLazyBoolNo: 2097 // Call mmap() to create memory in the inferior.. 2098 unsigned prot = 0; 2099 if (permissions & lldb::ePermissionsReadable) 2100 prot |= eMmapProtRead; 2101 if (permissions & lldb::ePermissionsWritable) 2102 prot |= eMmapProtWrite; 2103 if (permissions & lldb::ePermissionsExecutable) 2104 prot |= eMmapProtExec; 2105 2106 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2107 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2108 m_addr_to_mmap_size[allocated_addr] = size; 2109 else 2110 allocated_addr = LLDB_INVALID_ADDRESS; 2111 break; 2112 } 2113 2114 if (allocated_addr == LLDB_INVALID_ADDRESS) 2115 error.SetErrorStringWithFormat("unable to allocate %llu bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2116 else 2117 error.Clear(); 2118 return allocated_addr; 2119 } 2120 2121 Error 2122 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2123 MemoryRegionInfo ®ion_info) 2124 { 2125 2126 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2127 return error; 2128 } 2129 2130 Error 2131 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2132 { 2133 2134 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2135 return error; 2136 } 2137 2138 Error 2139 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2140 { 2141 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2142 return error; 2143 } 2144 2145 Error 2146 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2147 { 2148 Error error; 2149 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2150 2151 switch (supported) 2152 { 2153 case eLazyBoolCalculate: 2154 // We should never be deallocating memory without allocating memory 2155 // first so we should never get eLazyBoolCalculate 2156 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2157 break; 2158 2159 case eLazyBoolYes: 2160 if (!m_gdb_comm.DeallocateMemory (addr)) 2161 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 2162 break; 2163 2164 case eLazyBoolNo: 2165 // Call munmap() to deallocate memory in the inferior.. 2166 { 2167 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2168 if (pos != m_addr_to_mmap_size.end() && 2169 InferiorCallMunmap(this, addr, pos->second)) 2170 m_addr_to_mmap_size.erase (pos); 2171 else 2172 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%llx", addr); 2173 } 2174 break; 2175 } 2176 2177 return error; 2178 } 2179 2180 2181 //------------------------------------------------------------------ 2182 // Process STDIO 2183 //------------------------------------------------------------------ 2184 size_t 2185 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2186 { 2187 if (m_stdio_communication.IsConnected()) 2188 { 2189 ConnectionStatus status; 2190 m_stdio_communication.Write(src, src_len, status, NULL); 2191 } 2192 return 0; 2193 } 2194 2195 Error 2196 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 2197 { 2198 Error error; 2199 assert (bp_site != NULL); 2200 2201 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2202 user_id_t site_id = bp_site->GetID(); 2203 const addr_t addr = bp_site->GetLoadAddress(); 2204 if (log) 2205 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx", site_id, (uint64_t)addr); 2206 2207 if (bp_site->IsEnabled()) 2208 { 2209 if (log) 2210 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %llu) address = 0x%llx -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2211 return error; 2212 } 2213 else 2214 { 2215 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2216 2217 if (bp_site->HardwarePreferred()) 2218 { 2219 // Try and set hardware breakpoint, and if that fails, fall through 2220 // and set a software breakpoint? 2221 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2222 { 2223 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2224 { 2225 bp_site->SetEnabled(true); 2226 bp_site->SetType (BreakpointSite::eHardware); 2227 return error; 2228 } 2229 } 2230 } 2231 2232 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2233 { 2234 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2235 { 2236 bp_site->SetEnabled(true); 2237 bp_site->SetType (BreakpointSite::eExternal); 2238 return error; 2239 } 2240 } 2241 2242 return EnableSoftwareBreakpoint (bp_site); 2243 } 2244 2245 if (log) 2246 { 2247 const char *err_string = error.AsCString(); 2248 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8llx: %s", 2249 bp_site->GetLoadAddress(), 2250 err_string ? err_string : "NULL"); 2251 } 2252 // We shouldn't reach here on a successful breakpoint enable... 2253 if (error.Success()) 2254 error.SetErrorToGenericError(); 2255 return error; 2256 } 2257 2258 Error 2259 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 2260 { 2261 Error error; 2262 assert (bp_site != NULL); 2263 addr_t addr = bp_site->GetLoadAddress(); 2264 user_id_t site_id = bp_site->GetID(); 2265 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2266 if (log) 2267 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx", site_id, (uint64_t)addr); 2268 2269 if (bp_site->IsEnabled()) 2270 { 2271 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2272 2273 BreakpointSite::Type bp_type = bp_site->GetType(); 2274 switch (bp_type) 2275 { 2276 case BreakpointSite::eSoftware: 2277 error = DisableSoftwareBreakpoint (bp_site); 2278 break; 2279 2280 case BreakpointSite::eHardware: 2281 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2282 error.SetErrorToGenericError(); 2283 break; 2284 2285 case BreakpointSite::eExternal: 2286 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2287 error.SetErrorToGenericError(); 2288 break; 2289 } 2290 if (error.Success()) 2291 bp_site->SetEnabled(false); 2292 } 2293 else 2294 { 2295 if (log) 2296 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2297 return error; 2298 } 2299 2300 if (error.Success()) 2301 error.SetErrorToGenericError(); 2302 return error; 2303 } 2304 2305 // Pre-requisite: wp != NULL. 2306 static GDBStoppointType 2307 GetGDBStoppointType (Watchpoint *wp) 2308 { 2309 assert(wp); 2310 bool watch_read = wp->WatchpointRead(); 2311 bool watch_write = wp->WatchpointWrite(); 2312 2313 // watch_read and watch_write cannot both be false. 2314 assert(watch_read || watch_write); 2315 if (watch_read && watch_write) 2316 return eWatchpointReadWrite; 2317 else if (watch_read) 2318 return eWatchpointRead; 2319 else // Must be watch_write, then. 2320 return eWatchpointWrite; 2321 } 2322 2323 Error 2324 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp) 2325 { 2326 Error error; 2327 if (wp) 2328 { 2329 user_id_t watchID = wp->GetID(); 2330 addr_t addr = wp->GetLoadAddress(); 2331 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2332 if (log) 2333 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %llu)", watchID); 2334 if (wp->IsEnabled()) 2335 { 2336 if (log) 2337 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %llu) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 2338 return error; 2339 } 2340 2341 GDBStoppointType type = GetGDBStoppointType(wp); 2342 // Pass down an appropriate z/Z packet... 2343 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2344 { 2345 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2346 { 2347 wp->SetEnabled(true); 2348 return error; 2349 } 2350 else 2351 error.SetErrorString("sending gdb watchpoint packet failed"); 2352 } 2353 else 2354 error.SetErrorString("watchpoints not supported"); 2355 } 2356 else 2357 { 2358 error.SetErrorString("Watchpoint argument was NULL."); 2359 } 2360 if (error.Success()) 2361 error.SetErrorToGenericError(); 2362 return error; 2363 } 2364 2365 Error 2366 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp) 2367 { 2368 Error error; 2369 if (wp) 2370 { 2371 user_id_t watchID = wp->GetID(); 2372 2373 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2374 2375 addr_t addr = wp->GetLoadAddress(); 2376 if (log) 2377 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx", watchID, (uint64_t)addr); 2378 2379 if (!wp->IsEnabled()) 2380 { 2381 if (log) 2382 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %llu) addr = 0x%8.8llx -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2383 // See also 'class WatchpointSentry' within StopInfo.cpp. 2384 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2385 // the watchpoint object to intelligently process this action. 2386 wp->SetEnabled(false); 2387 return error; 2388 } 2389 2390 if (wp->IsHardware()) 2391 { 2392 GDBStoppointType type = GetGDBStoppointType(wp); 2393 // Pass down an appropriate z/Z packet... 2394 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2395 { 2396 wp->SetEnabled(false); 2397 return error; 2398 } 2399 else 2400 error.SetErrorString("sending gdb watchpoint packet failed"); 2401 } 2402 // TODO: clear software watchpoints if we implement them 2403 } 2404 else 2405 { 2406 error.SetErrorString("Watchpoint argument was NULL."); 2407 } 2408 if (error.Success()) 2409 error.SetErrorToGenericError(); 2410 return error; 2411 } 2412 2413 void 2414 ProcessGDBRemote::Clear() 2415 { 2416 m_flags = 0; 2417 m_thread_list.Clear(); 2418 } 2419 2420 Error 2421 ProcessGDBRemote::DoSignal (int signo) 2422 { 2423 Error error; 2424 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2425 if (log) 2426 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2427 2428 if (!m_gdb_comm.SendAsyncSignal (signo)) 2429 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2430 return error; 2431 } 2432 2433 Error 2434 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2435 { 2436 ProcessLaunchInfo launch_info; 2437 return StartDebugserverProcess(debugserver_url, launch_info); 2438 } 2439 2440 Error 2441 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2442 { 2443 Error error; 2444 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2445 { 2446 // If we locate debugserver, keep that located version around 2447 static FileSpec g_debugserver_file_spec; 2448 2449 ProcessLaunchInfo debugserver_launch_info; 2450 char debugserver_path[PATH_MAX]; 2451 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2452 2453 // Always check to see if we have an environment override for the path 2454 // to the debugserver to use and use it if we do. 2455 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2456 if (env_debugserver_path) 2457 debugserver_file_spec.SetFile (env_debugserver_path, false); 2458 else 2459 debugserver_file_spec = g_debugserver_file_spec; 2460 bool debugserver_exists = debugserver_file_spec.Exists(); 2461 if (!debugserver_exists) 2462 { 2463 // The debugserver binary is in the LLDB.framework/Resources 2464 // directory. 2465 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2466 { 2467 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2468 debugserver_exists = debugserver_file_spec.Exists(); 2469 if (debugserver_exists) 2470 { 2471 g_debugserver_file_spec = debugserver_file_spec; 2472 } 2473 else 2474 { 2475 g_debugserver_file_spec.Clear(); 2476 debugserver_file_spec.Clear(); 2477 } 2478 } 2479 } 2480 2481 if (debugserver_exists) 2482 { 2483 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2484 2485 m_stdio_communication.Clear(); 2486 2487 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2488 2489 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2490 char arg_cstr[PATH_MAX]; 2491 2492 // Start args with "debugserver /file/path -r --" 2493 debugserver_args.AppendArgument(debugserver_path); 2494 debugserver_args.AppendArgument(debugserver_url); 2495 // use native registers, not the GDB registers 2496 debugserver_args.AppendArgument("--native-regs"); 2497 // make debugserver run in its own session so signals generated by 2498 // special terminal key sequences (^C) don't affect debugserver 2499 debugserver_args.AppendArgument("--setsid"); 2500 2501 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2502 if (env_debugserver_log_file) 2503 { 2504 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2505 debugserver_args.AppendArgument(arg_cstr); 2506 } 2507 2508 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2509 if (env_debugserver_log_flags) 2510 { 2511 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2512 debugserver_args.AppendArgument(arg_cstr); 2513 } 2514 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2515 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2516 2517 // We currently send down all arguments, attach pids, or attach 2518 // process names in dedicated GDB server packets, so we don't need 2519 // to pass them as arguments. This is currently because of all the 2520 // things we need to setup prior to launching: the environment, 2521 // current working dir, file actions, etc. 2522 #if 0 2523 // Now append the program arguments 2524 if (inferior_argv) 2525 { 2526 // Terminate the debugserver args so we can now append the inferior args 2527 debugserver_args.AppendArgument("--"); 2528 2529 for (int i = 0; inferior_argv[i] != NULL; ++i) 2530 debugserver_args.AppendArgument (inferior_argv[i]); 2531 } 2532 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2533 { 2534 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2535 debugserver_args.AppendArgument (arg_cstr); 2536 } 2537 else if (attach_name && attach_name[0]) 2538 { 2539 if (wait_for_launch) 2540 debugserver_args.AppendArgument ("--waitfor"); 2541 else 2542 debugserver_args.AppendArgument ("--attach"); 2543 debugserver_args.AppendArgument (attach_name); 2544 } 2545 #endif 2546 2547 ProcessLaunchInfo::FileAction file_action; 2548 2549 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2550 // to "/dev/null" if we run into any problems. 2551 file_action.Close (STDIN_FILENO); 2552 debugserver_launch_info.AppendFileAction (file_action); 2553 file_action.Close (STDOUT_FILENO); 2554 debugserver_launch_info.AppendFileAction (file_action); 2555 file_action.Close (STDERR_FILENO); 2556 debugserver_launch_info.AppendFileAction (file_action); 2557 2558 if (log) 2559 { 2560 StreamString strm; 2561 debugserver_args.Dump (&strm); 2562 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2563 } 2564 2565 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2566 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2567 2568 error = Host::LaunchProcess(debugserver_launch_info); 2569 2570 if (error.Success ()) 2571 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2572 else 2573 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2574 2575 if (error.Fail() || log) 2576 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%llu, path='%s'", m_debugserver_pid, debugserver_path); 2577 } 2578 else 2579 { 2580 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2581 } 2582 2583 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2584 StartAsyncThread (); 2585 } 2586 return error; 2587 } 2588 2589 bool 2590 ProcessGDBRemote::MonitorDebugserverProcess 2591 ( 2592 void *callback_baton, 2593 lldb::pid_t debugserver_pid, 2594 bool exited, // True if the process did exit 2595 int signo, // Zero for no signal 2596 int exit_status // Exit value of process if signal is zero 2597 ) 2598 { 2599 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2600 // and might not exist anymore, so we need to carefully try to get the 2601 // target for this process first since we have a race condition when 2602 // we are done running between getting the notice that the inferior 2603 // process has died and the debugserver that was debugging this process. 2604 // In our test suite, we are also continually running process after 2605 // process, so we must be very careful to make sure: 2606 // 1 - process object hasn't been deleted already 2607 // 2 - that a new process object hasn't been recreated in its place 2608 2609 // "debugserver_pid" argument passed in is the process ID for 2610 // debugserver that we are tracking... 2611 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2612 2613 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2614 2615 // Get a shared pointer to the target that has a matching process pointer. 2616 // This target could be gone, or the target could already have a new process 2617 // object inside of it 2618 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2619 2620 if (log) 2621 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%llu, signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2622 2623 if (target_sp) 2624 { 2625 // We found a process in a target that matches, but another thread 2626 // might be in the process of launching a new process that will 2627 // soon replace it, so get a shared pointer to the process so we 2628 // can keep it alive. 2629 ProcessSP process_sp (target_sp->GetProcessSP()); 2630 // Now we have a shared pointer to the process that can't go away on us 2631 // so we now make sure it was the same as the one passed in, and also make 2632 // sure that our previous "process *" didn't get deleted and have a new 2633 // "process *" created in its place with the same pointer. To verify this 2634 // we make sure the process has our debugserver process ID. If we pass all 2635 // of these tests, then we are sure that this process is the one we were 2636 // looking for. 2637 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2638 { 2639 // Sleep for a half a second to make sure our inferior process has 2640 // time to set its exit status before we set it incorrectly when 2641 // both the debugserver and the inferior process shut down. 2642 usleep (500000); 2643 // If our process hasn't yet exited, debugserver might have died. 2644 // If the process did exit, the we are reaping it. 2645 const StateType state = process->GetState(); 2646 2647 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2648 state != eStateInvalid && 2649 state != eStateUnloaded && 2650 state != eStateExited && 2651 state != eStateDetached) 2652 { 2653 char error_str[1024]; 2654 if (signo) 2655 { 2656 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2657 if (signal_cstr) 2658 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2659 else 2660 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2661 } 2662 else 2663 { 2664 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2665 } 2666 2667 process->SetExitStatus (-1, error_str); 2668 } 2669 // Debugserver has exited we need to let our ProcessGDBRemote 2670 // know that it no longer has a debugserver instance 2671 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2672 } 2673 } 2674 return true; 2675 } 2676 2677 void 2678 ProcessGDBRemote::KillDebugserverProcess () 2679 { 2680 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2681 { 2682 ::kill (m_debugserver_pid, SIGINT); 2683 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2684 } 2685 } 2686 2687 void 2688 ProcessGDBRemote::Initialize() 2689 { 2690 static bool g_initialized = false; 2691 2692 if (g_initialized == false) 2693 { 2694 g_initialized = true; 2695 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2696 GetPluginDescriptionStatic(), 2697 CreateInstance); 2698 2699 Log::Callbacks log_callbacks = { 2700 ProcessGDBRemoteLog::DisableLog, 2701 ProcessGDBRemoteLog::EnableLog, 2702 ProcessGDBRemoteLog::ListLogCategories 2703 }; 2704 2705 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2706 } 2707 } 2708 2709 bool 2710 ProcessGDBRemote::StartAsyncThread () 2711 { 2712 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2713 2714 if (log) 2715 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2716 2717 // Create a thread that watches our internal state and controls which 2718 // events make it to clients (into the DCProcess event queue). 2719 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2720 return IS_VALID_LLDB_HOST_THREAD(m_async_thread); 2721 } 2722 2723 void 2724 ProcessGDBRemote::StopAsyncThread () 2725 { 2726 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2727 2728 if (log) 2729 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2730 2731 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2732 2733 // This will shut down the async thread. 2734 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2735 2736 // Stop the stdio thread 2737 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2738 { 2739 Host::ThreadJoin (m_async_thread, NULL, NULL); 2740 } 2741 } 2742 2743 2744 void * 2745 ProcessGDBRemote::AsyncThread (void *arg) 2746 { 2747 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2748 2749 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2750 if (log) 2751 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread starting...", __FUNCTION__, arg, process->GetID()); 2752 2753 Listener listener ("ProcessGDBRemote::AsyncThread"); 2754 EventSP event_sp; 2755 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2756 eBroadcastBitAsyncThreadShouldExit; 2757 2758 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2759 { 2760 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2761 2762 bool done = false; 2763 while (!done) 2764 { 2765 if (log) 2766 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2767 if (listener.WaitForEvent (NULL, event_sp)) 2768 { 2769 const uint32_t event_type = event_sp->GetType(); 2770 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2771 { 2772 if (log) 2773 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2774 2775 switch (event_type) 2776 { 2777 case eBroadcastBitAsyncContinue: 2778 { 2779 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2780 2781 if (continue_packet) 2782 { 2783 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2784 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2785 if (log) 2786 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2787 2788 if (::strstr (continue_cstr, "vAttach") == NULL) 2789 process->SetPrivateState(eStateRunning); 2790 StringExtractorGDBRemote response; 2791 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2792 2793 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2794 // The thread ID list might be contained within the "response", or the stop reply packet that 2795 // caused the stop. So clear it now before we give the stop reply packet to the process 2796 // using the process->SetLastStopPacket()... 2797 process->ClearThreadIDList (); 2798 2799 switch (stop_state) 2800 { 2801 case eStateStopped: 2802 case eStateCrashed: 2803 case eStateSuspended: 2804 process->SetLastStopPacket (response); 2805 process->SetPrivateState (stop_state); 2806 break; 2807 2808 case eStateExited: 2809 process->SetLastStopPacket (response); 2810 process->ClearThreadIDList(); 2811 response.SetFilePos(1); 2812 process->SetExitStatus(response.GetHexU8(), NULL); 2813 done = true; 2814 break; 2815 2816 case eStateInvalid: 2817 process->SetExitStatus(-1, "lost connection"); 2818 break; 2819 2820 default: 2821 process->SetPrivateState (stop_state); 2822 break; 2823 } 2824 } 2825 } 2826 break; 2827 2828 case eBroadcastBitAsyncThreadShouldExit: 2829 if (log) 2830 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2831 done = true; 2832 break; 2833 2834 default: 2835 if (log) 2836 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2837 done = true; 2838 break; 2839 } 2840 } 2841 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2842 { 2843 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2844 { 2845 process->SetExitStatus (-1, "lost connection"); 2846 done = true; 2847 } 2848 } 2849 } 2850 else 2851 { 2852 if (log) 2853 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2854 done = true; 2855 } 2856 } 2857 } 2858 2859 if (log) 2860 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %llu) thread exiting...", __FUNCTION__, arg, process->GetID()); 2861 2862 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2863 return NULL; 2864 } 2865 2866 const char * 2867 ProcessGDBRemote::GetDispatchQueueNameForThread 2868 ( 2869 addr_t thread_dispatch_qaddr, 2870 std::string &dispatch_queue_name 2871 ) 2872 { 2873 dispatch_queue_name.clear(); 2874 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2875 { 2876 // Cache the dispatch_queue_offsets_addr value so we don't always have 2877 // to look it up 2878 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2879 { 2880 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2881 const Symbol *dispatch_queue_offsets_symbol = NULL; 2882 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2883 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2884 if (module_sp) 2885 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2886 2887 if (dispatch_queue_offsets_symbol == NULL) 2888 { 2889 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2890 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2891 if (module_sp) 2892 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2893 } 2894 if (dispatch_queue_offsets_symbol) 2895 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2896 2897 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2898 return NULL; 2899 } 2900 2901 uint8_t memory_buffer[8]; 2902 DataExtractor data (memory_buffer, 2903 sizeof(memory_buffer), 2904 m_target.GetArchitecture().GetByteOrder(), 2905 m_target.GetArchitecture().GetAddressByteSize()); 2906 2907 // Excerpt from src/queue_private.h 2908 struct dispatch_queue_offsets_s 2909 { 2910 uint16_t dqo_version; 2911 uint16_t dqo_label; 2912 uint16_t dqo_label_size; 2913 } dispatch_queue_offsets; 2914 2915 2916 Error error; 2917 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 2918 { 2919 uint32_t data_offset = 0; 2920 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 2921 { 2922 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 2923 { 2924 data_offset = 0; 2925 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 2926 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 2927 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 2928 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 2929 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 2930 dispatch_queue_name.erase (bytes_read); 2931 } 2932 } 2933 } 2934 } 2935 if (dispatch_queue_name.empty()) 2936 return NULL; 2937 return dispatch_queue_name.c_str(); 2938 } 2939 2940 //uint32_t 2941 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 2942 //{ 2943 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 2944 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 2945 // if (m_local_debugserver) 2946 // { 2947 // return Host::ListProcessesMatchingName (name, matches, pids); 2948 // } 2949 // else 2950 // { 2951 // // FIXME: Implement talking to the remote debugserver. 2952 // return 0; 2953 // } 2954 // 2955 //} 2956 // 2957 bool 2958 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 2959 lldb_private::StoppointCallbackContext *context, 2960 lldb::user_id_t break_id, 2961 lldb::user_id_t break_loc_id) 2962 { 2963 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 2964 // run so I can stop it if that's what I want to do. 2965 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2966 if (log) 2967 log->Printf("Hit New Thread Notification breakpoint."); 2968 return false; 2969 } 2970 2971 2972 bool 2973 ProcessGDBRemote::StartNoticingNewThreads() 2974 { 2975 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 2976 if (m_thread_create_bp_sp) 2977 { 2978 if (log && log->GetVerbose()) 2979 log->Printf("Enabled noticing new thread breakpoint."); 2980 m_thread_create_bp_sp->SetEnabled(true); 2981 } 2982 else 2983 { 2984 PlatformSP platform_sp (m_target.GetPlatform()); 2985 if (platform_sp) 2986 { 2987 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 2988 if (m_thread_create_bp_sp) 2989 { 2990 if (log && log->GetVerbose()) 2991 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 2992 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 2993 } 2994 else 2995 { 2996 if (log) 2997 log->Printf("Failed to create new thread notification breakpoint."); 2998 } 2999 } 3000 } 3001 return m_thread_create_bp_sp.get() != NULL; 3002 } 3003 3004 bool 3005 ProcessGDBRemote::StopNoticingNewThreads() 3006 { 3007 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3008 if (log && log->GetVerbose()) 3009 log->Printf ("Disabling new thread notification breakpoint."); 3010 3011 if (m_thread_create_bp_sp) 3012 m_thread_create_bp_sp->SetEnabled(false); 3013 3014 return true; 3015 } 3016 3017 lldb_private::DynamicLoader * 3018 ProcessGDBRemote::GetDynamicLoader () 3019 { 3020 if (m_dyld_ap.get() == NULL) 3021 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, m_dyld_plugin_name.empty() ? NULL : m_dyld_plugin_name.c_str())); 3022 return m_dyld_ap.get(); 3023 } 3024 3025 3026 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 3027 { 3028 private: 3029 3030 public: 3031 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3032 CommandObjectParsed (interpreter, 3033 "process plugin packet history", 3034 "Dumps the packet history buffer. ", 3035 NULL) 3036 { 3037 } 3038 3039 ~CommandObjectProcessGDBRemotePacketHistory () 3040 { 3041 } 3042 3043 bool 3044 DoExecute (Args& command, CommandReturnObject &result) 3045 { 3046 const size_t argc = command.GetArgumentCount(); 3047 if (argc == 0) 3048 { 3049 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3050 if (process) 3051 { 3052 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3053 result.SetStatus (eReturnStatusSuccessFinishResult); 3054 return true; 3055 } 3056 } 3057 else 3058 { 3059 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3060 } 3061 result.SetStatus (eReturnStatusFailed); 3062 return false; 3063 } 3064 }; 3065 3066 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3067 { 3068 private: 3069 3070 public: 3071 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3072 CommandObjectParsed (interpreter, 3073 "process plugin packet send", 3074 "Send a custom packet through the GDB remote protocol and print the answer. " 3075 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3076 NULL) 3077 { 3078 } 3079 3080 ~CommandObjectProcessGDBRemotePacketSend () 3081 { 3082 } 3083 3084 bool 3085 DoExecute (Args& command, CommandReturnObject &result) 3086 { 3087 const size_t argc = command.GetArgumentCount(); 3088 if (argc == 0) 3089 { 3090 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3091 result.SetStatus (eReturnStatusFailed); 3092 return false; 3093 } 3094 3095 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3096 if (process) 3097 { 3098 const StateType state = process->GetState(); 3099 3100 if (StateIsStoppedState (state, true)) 3101 { 3102 for (size_t i=0; i<argc; ++ i) 3103 { 3104 const char *packet_cstr = command.GetArgumentAtIndex(0); 3105 bool send_async = false; 3106 StringExtractorGDBRemote response; 3107 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3108 result.SetStatus (eReturnStatusSuccessFinishResult); 3109 Stream &output_strm = result.GetOutputStream(); 3110 output_strm.Printf (" packet: %s\n", packet_cstr); 3111 const std::string &response_str = response.GetStringRef(); 3112 if (response_str.empty()) 3113 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3114 else 3115 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3116 } 3117 } 3118 else 3119 { 3120 result.AppendErrorWithFormat ("process must be stopped in order to send GDB remote packets, state is %s", StateAsCString (state)); 3121 result.SetStatus (eReturnStatusFailed); 3122 return false; 3123 } 3124 3125 } 3126 return true; 3127 } 3128 }; 3129 3130 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3131 { 3132 private: 3133 3134 public: 3135 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3136 CommandObjectMultiword (interpreter, 3137 "process plugin packet", 3138 "Commands that deal with GDB remote packets.", 3139 NULL) 3140 { 3141 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3142 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3143 } 3144 3145 ~CommandObjectProcessGDBRemotePacket () 3146 { 3147 } 3148 }; 3149 3150 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3151 { 3152 public: 3153 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3154 CommandObjectMultiword (interpreter, 3155 "process plugin", 3156 "A set of commands for operating on a ProcessGDBRemote process.", 3157 "process plugin <subcommand> [<subcommand-options>]") 3158 { 3159 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3160 } 3161 3162 ~CommandObjectMultiwordProcessGDBRemote () 3163 { 3164 } 3165 }; 3166 3167 CommandObject * 3168 ProcessGDBRemote::GetPluginCommandObject() 3169 { 3170 if (!m_command_sp) 3171 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3172 return m_command_sp.get(); 3173 } 3174