1 //===-- ProcessGDBRemote.cpp ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/lldb-python.h" 11 12 // C Includes 13 #include <errno.h> 14 #include <spawn.h> 15 #include <stdlib.h> 16 #include <netinet/in.h> 17 #include <sys/mman.h> // for mmap 18 #include <sys/stat.h> 19 #include <sys/types.h> 20 #include <time.h> 21 22 // C++ Includes 23 #include <algorithm> 24 #include <map> 25 26 // Other libraries and framework includes 27 28 #include "lldb/Breakpoint/Watchpoint.h" 29 #include "lldb/Interpreter/Args.h" 30 #include "lldb/Core/ArchSpec.h" 31 #include "lldb/Core/Debugger.h" 32 #include "lldb/Core/ConnectionFileDescriptor.h" 33 #include "lldb/Host/FileSpec.h" 34 #include "lldb/Core/InputReader.h" 35 #include "lldb/Core/Module.h" 36 #include "lldb/Core/ModuleSpec.h" 37 #include "lldb/Core/PluginManager.h" 38 #include "lldb/Core/State.h" 39 #include "lldb/Core/StreamFile.h" 40 #include "lldb/Core/StreamString.h" 41 #include "lldb/Core/Timer.h" 42 #include "lldb/Core/Value.h" 43 #include "lldb/Host/Symbols.h" 44 #include "lldb/Host/TimeValue.h" 45 #include "lldb/Interpreter/CommandInterpreter.h" 46 #include "lldb/Interpreter/CommandObject.h" 47 #include "lldb/Interpreter/CommandObjectMultiword.h" 48 #include "lldb/Interpreter/CommandReturnObject.h" 49 #include "lldb/Symbol/ObjectFile.h" 50 #include "lldb/Target/DynamicLoader.h" 51 #include "lldb/Target/Target.h" 52 #include "lldb/Target/TargetList.h" 53 #include "lldb/Target/ThreadPlanCallFunction.h" 54 #include "lldb/Utility/PseudoTerminal.h" 55 56 // Project includes 57 #include "lldb/Host/Host.h" 58 #include "Plugins/Process/Utility/InferiorCallPOSIX.h" 59 #include "Plugins/Process/Utility/StopInfoMachException.h" 60 #include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h" 61 #include "Utility/StringExtractorGDBRemote.h" 62 #include "GDBRemoteRegisterContext.h" 63 #include "ProcessGDBRemote.h" 64 #include "ProcessGDBRemoteLog.h" 65 #include "ThreadGDBRemote.h" 66 67 #include "Plugins/DynamicLoader/Darwin-Kernel/DynamicLoaderDarwinKernel.h" 68 69 namespace lldb 70 { 71 // Provide a function that can easily dump the packet history if we know a 72 // ProcessGDBRemote * value (which we can get from logs or from debugging). 73 // We need the function in the lldb namespace so it makes it into the final 74 // executable since the LLDB shared library only exports stuff in the lldb 75 // namespace. This allows you to attach with a debugger and call this 76 // function and get the packet history dumped to a file. 77 void 78 DumpProcessGDBRemotePacketHistory (void *p, const char *path) 79 { 80 lldb_private::StreamFile strm; 81 lldb_private::Error error (strm.GetFile().Open(path, lldb_private::File::eOpenOptionWrite | lldb_private::File::eOpenOptionCanCreate)); 82 if (error.Success()) 83 ((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory (strm); 84 } 85 } 86 87 88 #define DEBUGSERVER_BASENAME "debugserver" 89 using namespace lldb; 90 using namespace lldb_private; 91 92 static bool rand_initialized = false; 93 94 // TODO Randomly assigning a port is unsafe. We should get an unused 95 // ephemeral port from the kernel and make sure we reserve it before passing 96 // it to debugserver. 97 98 #if defined (__APPLE__) 99 #define LOW_PORT (IPPORT_RESERVED) 100 #define HIGH_PORT (IPPORT_HIFIRSTAUTO) 101 #else 102 #define LOW_PORT (1024u) 103 #define HIGH_PORT (49151u) 104 #endif 105 106 static inline uint16_t 107 get_random_port () 108 { 109 if (!rand_initialized) 110 { 111 time_t seed = time(NULL); 112 113 rand_initialized = true; 114 srand(seed); 115 } 116 return (rand() % (HIGH_PORT - LOW_PORT)) + LOW_PORT; 117 } 118 119 120 const char * 121 ProcessGDBRemote::GetPluginNameStatic() 122 { 123 return "gdb-remote"; 124 } 125 126 const char * 127 ProcessGDBRemote::GetPluginDescriptionStatic() 128 { 129 return "GDB Remote protocol based debugging plug-in."; 130 } 131 132 void 133 ProcessGDBRemote::Terminate() 134 { 135 PluginManager::UnregisterPlugin (ProcessGDBRemote::CreateInstance); 136 } 137 138 139 lldb::ProcessSP 140 ProcessGDBRemote::CreateInstance (Target &target, Listener &listener, const FileSpec *crash_file_path) 141 { 142 lldb::ProcessSP process_sp; 143 if (crash_file_path == NULL) 144 process_sp.reset (new ProcessGDBRemote (target, listener)); 145 return process_sp; 146 } 147 148 bool 149 ProcessGDBRemote::CanDebug (Target &target, bool plugin_specified_by_name) 150 { 151 if (plugin_specified_by_name) 152 return true; 153 154 // For now we are just making sure the file exists for a given module 155 Module *exe_module = target.GetExecutableModulePointer(); 156 if (exe_module) 157 { 158 ObjectFile *exe_objfile = exe_module->GetObjectFile(); 159 // We can't debug core files... 160 switch (exe_objfile->GetType()) 161 { 162 case ObjectFile::eTypeInvalid: 163 case ObjectFile::eTypeCoreFile: 164 case ObjectFile::eTypeDebugInfo: 165 case ObjectFile::eTypeObjectFile: 166 case ObjectFile::eTypeSharedLibrary: 167 case ObjectFile::eTypeStubLibrary: 168 return false; 169 case ObjectFile::eTypeExecutable: 170 case ObjectFile::eTypeDynamicLinker: 171 case ObjectFile::eTypeUnknown: 172 break; 173 } 174 return exe_module->GetFileSpec().Exists(); 175 } 176 // However, if there is no executable module, we return true since we might be preparing to attach. 177 return true; 178 } 179 180 //---------------------------------------------------------------------- 181 // ProcessGDBRemote constructor 182 //---------------------------------------------------------------------- 183 ProcessGDBRemote::ProcessGDBRemote(Target& target, Listener &listener) : 184 Process (target, listener), 185 m_flags (0), 186 m_gdb_comm(false), 187 m_debugserver_pid (LLDB_INVALID_PROCESS_ID), 188 m_last_stop_packet (), 189 m_last_stop_packet_mutex (Mutex::eMutexTypeNormal), 190 m_register_info (), 191 m_async_broadcaster (NULL, "lldb.process.gdb-remote.async-broadcaster"), 192 m_async_thread (LLDB_INVALID_HOST_THREAD), 193 m_async_thread_state(eAsyncThreadNotStarted), 194 m_async_thread_state_mutex(Mutex::eMutexTypeRecursive), 195 m_thread_ids (), 196 m_continue_c_tids (), 197 m_continue_C_tids (), 198 m_continue_s_tids (), 199 m_continue_S_tids (), 200 m_dispatch_queue_offsets_addr (LLDB_INVALID_ADDRESS), 201 m_max_memory_size (512), 202 m_addr_to_mmap_size (), 203 m_thread_create_bp_sp (), 204 m_waiting_for_attach (false), 205 m_destroy_tried_resuming (false), 206 m_dyld_plugin_name(), 207 m_kernel_load_addr (LLDB_INVALID_ADDRESS), 208 m_command_sp () 209 { 210 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadShouldExit, "async thread should exit"); 211 m_async_broadcaster.SetEventName (eBroadcastBitAsyncContinue, "async thread continue"); 212 m_async_broadcaster.SetEventName (eBroadcastBitAsyncThreadDidExit, "async thread did exit"); 213 } 214 215 //---------------------------------------------------------------------- 216 // Destructor 217 //---------------------------------------------------------------------- 218 ProcessGDBRemote::~ProcessGDBRemote() 219 { 220 // m_mach_process.UnregisterNotificationCallbacks (this); 221 Clear(); 222 // We need to call finalize on the process before destroying ourselves 223 // to make sure all of the broadcaster cleanup goes as planned. If we 224 // destruct this class, then Process::~Process() might have problems 225 // trying to fully destroy the broadcaster. 226 Finalize(); 227 228 // The general Finalize is going to try to destroy the process and that SHOULD 229 // shut down the async thread. However, if we don't kill it it will get stranded and 230 // its connection will go away so when it wakes up it will crash. So kill it for sure here. 231 StopAsyncThread(); 232 KillDebugserverProcess(); 233 } 234 235 //---------------------------------------------------------------------- 236 // PluginInterface 237 //---------------------------------------------------------------------- 238 const char * 239 ProcessGDBRemote::GetPluginName() 240 { 241 return "Process debugging plug-in that uses the GDB remote protocol"; 242 } 243 244 const char * 245 ProcessGDBRemote::GetShortPluginName() 246 { 247 return GetPluginNameStatic(); 248 } 249 250 uint32_t 251 ProcessGDBRemote::GetPluginVersion() 252 { 253 return 1; 254 } 255 256 void 257 ProcessGDBRemote::BuildDynamicRegisterInfo (bool force) 258 { 259 if (!force && m_register_info.GetNumRegisters() > 0) 260 return; 261 262 char packet[128]; 263 m_register_info.Clear(); 264 uint32_t reg_offset = 0; 265 uint32_t reg_num = 0; 266 for (StringExtractorGDBRemote::ResponseType response_type = StringExtractorGDBRemote::eResponse; 267 response_type == StringExtractorGDBRemote::eResponse; 268 ++reg_num) 269 { 270 const int packet_len = ::snprintf (packet, sizeof(packet), "qRegisterInfo%x", reg_num); 271 assert (packet_len < sizeof(packet)); 272 StringExtractorGDBRemote response; 273 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, false)) 274 { 275 response_type = response.GetResponseType(); 276 if (response_type == StringExtractorGDBRemote::eResponse) 277 { 278 std::string name; 279 std::string value; 280 ConstString reg_name; 281 ConstString alt_name; 282 ConstString set_name; 283 RegisterInfo reg_info = { NULL, // Name 284 NULL, // Alt name 285 0, // byte size 286 reg_offset, // offset 287 eEncodingUint, // encoding 288 eFormatHex, // formate 289 { 290 LLDB_INVALID_REGNUM, // GCC reg num 291 LLDB_INVALID_REGNUM, // DWARF reg num 292 LLDB_INVALID_REGNUM, // generic reg num 293 reg_num, // GDB reg num 294 reg_num // native register number 295 }, 296 NULL, 297 NULL 298 }; 299 300 while (response.GetNameColonValue(name, value)) 301 { 302 if (name.compare("name") == 0) 303 { 304 reg_name.SetCString(value.c_str()); 305 } 306 else if (name.compare("alt-name") == 0) 307 { 308 alt_name.SetCString(value.c_str()); 309 } 310 else if (name.compare("bitsize") == 0) 311 { 312 reg_info.byte_size = Args::StringToUInt32(value.c_str(), 0, 0) / CHAR_BIT; 313 } 314 else if (name.compare("offset") == 0) 315 { 316 uint32_t offset = Args::StringToUInt32(value.c_str(), UINT32_MAX, 0); 317 if (reg_offset != offset) 318 { 319 reg_offset = offset; 320 } 321 } 322 else if (name.compare("encoding") == 0) 323 { 324 const Encoding encoding = Args::StringToEncoding (value.c_str()); 325 if (encoding != eEncodingInvalid) 326 reg_info.encoding = encoding; 327 } 328 else if (name.compare("format") == 0) 329 { 330 Format format = eFormatInvalid; 331 if (Args::StringToFormat (value.c_str(), format, NULL).Success()) 332 reg_info.format = format; 333 else if (value.compare("binary") == 0) 334 reg_info.format = eFormatBinary; 335 else if (value.compare("decimal") == 0) 336 reg_info.format = eFormatDecimal; 337 else if (value.compare("hex") == 0) 338 reg_info.format = eFormatHex; 339 else if (value.compare("float") == 0) 340 reg_info.format = eFormatFloat; 341 else if (value.compare("vector-sint8") == 0) 342 reg_info.format = eFormatVectorOfSInt8; 343 else if (value.compare("vector-uint8") == 0) 344 reg_info.format = eFormatVectorOfUInt8; 345 else if (value.compare("vector-sint16") == 0) 346 reg_info.format = eFormatVectorOfSInt16; 347 else if (value.compare("vector-uint16") == 0) 348 reg_info.format = eFormatVectorOfUInt16; 349 else if (value.compare("vector-sint32") == 0) 350 reg_info.format = eFormatVectorOfSInt32; 351 else if (value.compare("vector-uint32") == 0) 352 reg_info.format = eFormatVectorOfUInt32; 353 else if (value.compare("vector-float32") == 0) 354 reg_info.format = eFormatVectorOfFloat32; 355 else if (value.compare("vector-uint128") == 0) 356 reg_info.format = eFormatVectorOfUInt128; 357 } 358 else if (name.compare("set") == 0) 359 { 360 set_name.SetCString(value.c_str()); 361 } 362 else if (name.compare("gcc") == 0) 363 { 364 reg_info.kinds[eRegisterKindGCC] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 365 } 366 else if (name.compare("dwarf") == 0) 367 { 368 reg_info.kinds[eRegisterKindDWARF] = Args::StringToUInt32(value.c_str(), LLDB_INVALID_REGNUM, 0); 369 } 370 else if (name.compare("generic") == 0) 371 { 372 reg_info.kinds[eRegisterKindGeneric] = Args::StringToGenericRegister (value.c_str()); 373 } 374 } 375 376 reg_info.byte_offset = reg_offset; 377 assert (reg_info.byte_size != 0); 378 reg_offset += reg_info.byte_size; 379 m_register_info.AddRegister(reg_info, reg_name, alt_name, set_name); 380 } 381 } 382 else 383 { 384 break; 385 } 386 } 387 388 // We didn't get anything if the accumulated reg_num is zero. See if we are 389 // debugging ARM and fill with a hard coded register set until we can get an 390 // updated debugserver down on the devices. 391 // On the other hand, if the accumulated reg_num is positive, see if we can 392 // add composite registers to the existing primordial ones. 393 bool from_scratch = (reg_num == 0); 394 395 const ArchSpec &target_arch = GetTarget().GetArchitecture(); 396 const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture(); 397 const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture(); 398 399 // Use the process' architecture instead of the host arch, if available 400 ArchSpec remote_arch; 401 if (remote_process_arch.IsValid ()) 402 remote_arch = remote_process_arch; 403 else 404 remote_arch = remote_host_arch; 405 406 if (!target_arch.IsValid()) 407 { 408 if (remote_arch.IsValid() 409 && remote_arch.GetMachine() == llvm::Triple::arm 410 && remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 411 m_register_info.HardcodeARMRegisters(from_scratch); 412 } 413 else if (target_arch.GetMachine() == llvm::Triple::arm) 414 { 415 m_register_info.HardcodeARMRegisters(from_scratch); 416 } 417 418 // Add some convenience registers (eax, ebx, ecx, edx, esi, edi, ebp, esp) to x86_64. 419 if ((target_arch.IsValid() && target_arch.GetMachine() == llvm::Triple::x86_64) 420 || (remote_arch.IsValid() && remote_arch.GetMachine() == llvm::Triple::x86_64)) 421 m_register_info.Addx86_64ConvenienceRegisters(); 422 423 // At this point, we can finalize our register info. 424 m_register_info.Finalize (); 425 } 426 427 Error 428 ProcessGDBRemote::WillLaunch (Module* module) 429 { 430 return WillLaunchOrAttach (); 431 } 432 433 Error 434 ProcessGDBRemote::WillAttachToProcessWithID (lldb::pid_t pid) 435 { 436 return WillLaunchOrAttach (); 437 } 438 439 Error 440 ProcessGDBRemote::WillAttachToProcessWithName (const char *process_name, bool wait_for_launch) 441 { 442 return WillLaunchOrAttach (); 443 } 444 445 Error 446 ProcessGDBRemote::DoConnectRemote (Stream *strm, const char *remote_url) 447 { 448 Error error (WillLaunchOrAttach ()); 449 450 if (error.Fail()) 451 return error; 452 453 error = ConnectToDebugserver (remote_url); 454 455 if (error.Fail()) 456 return error; 457 StartAsyncThread (); 458 459 CheckForKernel (strm); 460 461 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 462 if (pid == LLDB_INVALID_PROCESS_ID) 463 { 464 // We don't have a valid process ID, so note that we are connected 465 // and could now request to launch or attach, or get remote process 466 // listings... 467 SetPrivateState (eStateConnected); 468 } 469 else 470 { 471 // We have a valid process 472 SetID (pid); 473 GetThreadList(); 474 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 475 { 476 const StateType state = SetThreadStopInfo (m_last_stop_packet); 477 if (state == eStateStopped) 478 { 479 SetPrivateState (state); 480 } 481 else 482 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but state was not stopped: %s", pid, remote_url, StateAsCString (state)); 483 } 484 else 485 error.SetErrorStringWithFormat ("Process %" PRIu64 " was reported after connecting to '%s', but no stop reply packet was received", pid, remote_url); 486 } 487 488 if (error.Success() 489 && !GetTarget().GetArchitecture().IsValid() 490 && m_gdb_comm.GetHostArchitecture().IsValid()) 491 { 492 // Prefer the *process'* architecture over that of the *host*, if available. 493 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 494 GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture()); 495 else 496 GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture()); 497 } 498 499 return error; 500 } 501 502 // When we are establishing a connection to a remote system and we have no executable specified, 503 // or the executable is a kernel, we may be looking at a KASLR situation (where the kernel has been 504 // slid in memory.) 505 // 506 // This function tries to locate the kernel in memory if this is possibly a kernel debug session. 507 // 508 // If a kernel is found, return the address of the kernel in GetImageInfoAddress() -- the 509 // DynamicLoaderDarwinKernel plugin uses this address as the kernel load address and will load the 510 // binary, if needed, along with all the kexts. 511 512 void 513 ProcessGDBRemote::CheckForKernel (Stream *strm) 514 { 515 // early return if this isn't an "unknown" system (kernel debugging doesn't have a system type) 516 const ArchSpec &gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 517 if (!gdb_remote_arch.IsValid() || gdb_remote_arch.GetTriple().getVendor() != llvm::Triple::UnknownVendor) 518 return; 519 520 Module *exe_module = GetTarget().GetExecutableModulePointer(); 521 ObjectFile *exe_objfile = NULL; 522 if (exe_module) 523 exe_objfile = exe_module->GetObjectFile(); 524 525 // early return if we have an executable and it is not a kernel--this is very unlikely to be a kernel debug session. 526 if (exe_objfile 527 && (exe_objfile->GetType() != ObjectFile::eTypeExecutable 528 || exe_objfile->GetStrata() != ObjectFile::eStrataKernel)) 529 return; 530 531 // See if the kernel is in memory at the File address (slide == 0) -- no work needed, if so. 532 if (exe_objfile && exe_objfile->GetHeaderAddress().IsValid()) 533 { 534 ModuleSP memory_module_sp; 535 memory_module_sp = ReadModuleFromMemory (exe_module->GetFileSpec(), exe_objfile->GetHeaderAddress().GetFileAddress(), false, false); 536 if (memory_module_sp.get() 537 && memory_module_sp->GetUUID().IsValid() 538 && memory_module_sp->GetUUID() == exe_module->GetUUID()) 539 { 540 m_kernel_load_addr = exe_objfile->GetHeaderAddress().GetFileAddress(); 541 m_dyld_plugin_name = DynamicLoaderDarwinKernel::GetPluginNameStatic(); 542 SetCanJIT(false); 543 return; 544 } 545 } 546 547 // See if the kernel's load address is stored in the kernel's low globals page; this is 548 // done when a debug boot-arg has been set. 549 550 Error error; 551 uint8_t buf[24]; 552 ModuleSP memory_module_sp; 553 addr_t kernel_addr = LLDB_INVALID_ADDRESS; 554 555 // First try the 32-bit 556 if (memory_module_sp.get() == NULL) 557 { 558 DataExtractor data4 (buf, sizeof(buf), gdb_remote_arch.GetByteOrder(), 4); 559 if (DoReadMemory (0xffff0110, buf, 4, error) == 4) 560 { 561 uint32_t offset = 0; 562 kernel_addr = data4.GetU32(&offset); 563 memory_module_sp = ReadModuleFromMemory (FileSpec("mach_kernel", false), kernel_addr, false, false); 564 if (!memory_module_sp.get() 565 || !memory_module_sp->GetUUID().IsValid() 566 || memory_module_sp->GetObjectFile() == NULL 567 || memory_module_sp->GetObjectFile()->GetType() != ObjectFile::eTypeExecutable 568 || memory_module_sp->GetObjectFile()->GetStrata() != ObjectFile::eStrataKernel) 569 { 570 memory_module_sp.reset(); 571 } 572 } 573 } 574 575 // Now try the 64-bit location 576 if (memory_module_sp.get() == NULL) 577 { 578 DataExtractor data8 (buf, sizeof(buf), gdb_remote_arch.GetByteOrder(), 8); 579 if (DoReadMemory (0xffffff8000002010ULL, buf, 8, error) == 8) 580 { 581 uint32_t offset = 0; 582 kernel_addr = data8.GetU64(&offset); 583 memory_module_sp = ReadModuleFromMemory (FileSpec("mach_kernel", false), kernel_addr, false, false); 584 if (!memory_module_sp.get() 585 || !memory_module_sp->GetUUID().IsValid() 586 || memory_module_sp->GetObjectFile() == NULL 587 || memory_module_sp->GetObjectFile()->GetType() != ObjectFile::eTypeExecutable 588 || memory_module_sp->GetObjectFile()->GetStrata() != ObjectFile::eStrataKernel) 589 { 590 memory_module_sp.reset(); 591 } 592 } 593 } 594 595 if (memory_module_sp.get() 596 && memory_module_sp->GetArchitecture().IsValid() 597 && memory_module_sp->GetArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) 598 { 599 m_kernel_load_addr = kernel_addr; 600 m_dyld_plugin_name = DynamicLoaderDarwinKernel::GetPluginNameStatic(); 601 SetCanJIT(false); 602 return; 603 } 604 } 605 606 Error 607 ProcessGDBRemote::WillLaunchOrAttach () 608 { 609 Error error; 610 m_stdio_communication.Clear (); 611 return error; 612 } 613 614 //---------------------------------------------------------------------- 615 // Process Control 616 //---------------------------------------------------------------------- 617 Error 618 ProcessGDBRemote::DoLaunch (Module *exe_module, const ProcessLaunchInfo &launch_info) 619 { 620 Error error; 621 622 uint32_t launch_flags = launch_info.GetFlags().Get(); 623 const char *stdin_path = NULL; 624 const char *stdout_path = NULL; 625 const char *stderr_path = NULL; 626 const char *working_dir = launch_info.GetWorkingDirectory(); 627 628 const ProcessLaunchInfo::FileAction *file_action; 629 file_action = launch_info.GetFileActionForFD (STDIN_FILENO); 630 if (file_action) 631 { 632 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 633 stdin_path = file_action->GetPath(); 634 } 635 file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 636 if (file_action) 637 { 638 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 639 stdout_path = file_action->GetPath(); 640 } 641 file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 642 if (file_action) 643 { 644 if (file_action->GetAction () == ProcessLaunchInfo::FileAction::eFileActionOpen) 645 stderr_path = file_action->GetPath(); 646 } 647 648 // ::LogSetBitMask (GDBR_LOG_DEFAULT); 649 // ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE | LLDB_LOG_OPTION_PREPEND_TIMESTAMP | LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD); 650 // ::LogSetLogFile ("/dev/stdout"); 651 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 652 653 ObjectFile * object_file = exe_module->GetObjectFile(); 654 if (object_file) 655 { 656 char host_port[128]; 657 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 658 char connect_url[128]; 659 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 660 661 // Make sure we aren't already connected? 662 if (!m_gdb_comm.IsConnected()) 663 { 664 error = StartDebugserverProcess (host_port, launch_info); 665 if (error.Fail()) 666 { 667 if (log) 668 log->Printf("failed to start debugserver process: %s", error.AsCString()); 669 return error; 670 } 671 672 error = ConnectToDebugserver (connect_url); 673 } 674 675 if (error.Success()) 676 { 677 lldb_utility::PseudoTerminal pty; 678 const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0; 679 680 // If the debugserver is local and we aren't disabling STDIO, lets use 681 // a pseudo terminal to instead of relying on the 'O' packets for stdio 682 // since 'O' packets can really slow down debugging if the inferior 683 // does a lot of output. 684 PlatformSP platform_sp (m_target.GetPlatform()); 685 if (platform_sp && platform_sp->IsHost() && !disable_stdio) 686 { 687 const char *slave_name = NULL; 688 if (stdin_path == NULL || stdout_path == NULL || stderr_path == NULL) 689 { 690 if (pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY, NULL, 0)) 691 slave_name = pty.GetSlaveName (NULL, 0); 692 } 693 if (stdin_path == NULL) 694 stdin_path = slave_name; 695 696 if (stdout_path == NULL) 697 stdout_path = slave_name; 698 699 if (stderr_path == NULL) 700 stderr_path = slave_name; 701 } 702 703 // Set STDIN to /dev/null if we want STDIO disabled or if either 704 // STDOUT or STDERR have been set to something and STDIN hasn't 705 if (disable_stdio || (stdin_path == NULL && (stdout_path || stderr_path))) 706 stdin_path = "/dev/null"; 707 708 // Set STDOUT to /dev/null if we want STDIO disabled or if either 709 // STDIN or STDERR have been set to something and STDOUT hasn't 710 if (disable_stdio || (stdout_path == NULL && (stdin_path || stderr_path))) 711 stdout_path = "/dev/null"; 712 713 // Set STDERR to /dev/null if we want STDIO disabled or if either 714 // STDIN or STDOUT have been set to something and STDERR hasn't 715 if (disable_stdio || (stderr_path == NULL && (stdin_path || stdout_path))) 716 stderr_path = "/dev/null"; 717 718 if (stdin_path) 719 m_gdb_comm.SetSTDIN (stdin_path); 720 if (stdout_path) 721 m_gdb_comm.SetSTDOUT (stdout_path); 722 if (stderr_path) 723 m_gdb_comm.SetSTDERR (stderr_path); 724 725 m_gdb_comm.SetDisableASLR (launch_flags & eLaunchFlagDisableASLR); 726 727 m_gdb_comm.SendLaunchArchPacket (m_target.GetArchitecture().GetArchitectureName()); 728 729 if (working_dir && working_dir[0]) 730 { 731 m_gdb_comm.SetWorkingDir (working_dir); 732 } 733 734 // Send the environment and the program + arguments after we connect 735 const Args &environment = launch_info.GetEnvironmentEntries(); 736 if (environment.GetArgumentCount()) 737 { 738 size_t num_environment_entries = environment.GetArgumentCount(); 739 for (size_t i=0; i<num_environment_entries; ++i) 740 { 741 const char *env_entry = environment.GetArgumentAtIndex(i); 742 if (env_entry == NULL || m_gdb_comm.SendEnvironmentPacket(env_entry) != 0) 743 break; 744 } 745 } 746 747 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (10); 748 int arg_packet_err = m_gdb_comm.SendArgumentsPacket (launch_info.GetArguments().GetConstArgumentVector()); 749 if (arg_packet_err == 0) 750 { 751 std::string error_str; 752 if (m_gdb_comm.GetLaunchSuccess (error_str)) 753 { 754 SetID (m_gdb_comm.GetCurrentProcessID ()); 755 } 756 else 757 { 758 error.SetErrorString (error_str.c_str()); 759 } 760 } 761 else 762 { 763 error.SetErrorStringWithFormat("'A' packet returned an error: %i", arg_packet_err); 764 } 765 766 m_gdb_comm.SetPacketTimeout (old_packet_timeout); 767 768 if (GetID() == LLDB_INVALID_PROCESS_ID) 769 { 770 if (log) 771 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 772 KillDebugserverProcess (); 773 return error; 774 } 775 776 if (m_gdb_comm.SendPacketAndWaitForResponse("?", 1, m_last_stop_packet, false)) 777 { 778 SetPrivateState (SetThreadStopInfo (m_last_stop_packet)); 779 780 if (!disable_stdio) 781 { 782 if (pty.GetMasterFileDescriptor() != lldb_utility::PseudoTerminal::invalid_fd) 783 SetSTDIOFileDescriptor (pty.ReleaseMasterFileDescriptor()); 784 } 785 } 786 } 787 else 788 { 789 if (log) 790 log->Printf("failed to connect to debugserver: %s", error.AsCString()); 791 } 792 } 793 else 794 { 795 // Set our user ID to an invalid process ID. 796 SetID(LLDB_INVALID_PROCESS_ID); 797 error.SetErrorStringWithFormat ("failed to get object file from '%s' for arch %s", 798 exe_module->GetFileSpec().GetFilename().AsCString(), 799 exe_module->GetArchitecture().GetArchitectureName()); 800 } 801 return error; 802 803 } 804 805 806 Error 807 ProcessGDBRemote::ConnectToDebugserver (const char *connect_url) 808 { 809 Error error; 810 // Sleep and wait a bit for debugserver to start to listen... 811 std::auto_ptr<ConnectionFileDescriptor> conn_ap(new ConnectionFileDescriptor()); 812 if (conn_ap.get()) 813 { 814 const uint32_t max_retry_count = 50; 815 uint32_t retry_count = 0; 816 while (!m_gdb_comm.IsConnected()) 817 { 818 if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) 819 { 820 m_gdb_comm.SetConnection (conn_ap.release()); 821 break; 822 } 823 retry_count++; 824 825 if (retry_count >= max_retry_count) 826 break; 827 828 usleep (100000); 829 } 830 } 831 832 if (!m_gdb_comm.IsConnected()) 833 { 834 if (error.Success()) 835 error.SetErrorString("not connected to remote gdb server"); 836 return error; 837 } 838 839 // We always seem to be able to open a connection to a local port 840 // so we need to make sure we can then send data to it. If we can't 841 // then we aren't actually connected to anything, so try and do the 842 // handshake with the remote GDB server and make sure that goes 843 // alright. 844 if (!m_gdb_comm.HandshakeWithServer (NULL)) 845 { 846 m_gdb_comm.Disconnect(); 847 if (error.Success()) 848 error.SetErrorString("not connected to remote gdb server"); 849 return error; 850 } 851 m_gdb_comm.ResetDiscoverableSettings(); 852 m_gdb_comm.QueryNoAckModeSupported (); 853 m_gdb_comm.GetThreadSuffixSupported (); 854 m_gdb_comm.GetListThreadsInStopReplySupported (); 855 m_gdb_comm.GetHostInfo (); 856 m_gdb_comm.GetVContSupported ('c'); 857 m_gdb_comm.GetVAttachOrWaitSupported(); 858 859 size_t num_cmds = GetExtraStartupCommands().GetArgumentCount(); 860 for (size_t idx = 0; idx < num_cmds; idx++) 861 { 862 StringExtractorGDBRemote response; 863 m_gdb_comm.SendPacketAndWaitForResponse (GetExtraStartupCommands().GetArgumentAtIndex(idx), response, false); 864 } 865 return error; 866 } 867 868 void 869 ProcessGDBRemote::DidLaunchOrAttach () 870 { 871 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 872 if (log) 873 log->Printf ("ProcessGDBRemote::DidLaunch()"); 874 if (GetID() != LLDB_INVALID_PROCESS_ID) 875 { 876 m_dispatch_queue_offsets_addr = LLDB_INVALID_ADDRESS; 877 878 BuildDynamicRegisterInfo (false); 879 880 // See if the GDB server supports the qHostInfo information 881 882 ArchSpec gdb_remote_arch = m_gdb_comm.GetHostArchitecture(); 883 884 // See if the GDB server supports the qProcessInfo packet, if so 885 // prefer that over the Host information as it will be more specific 886 // to our process. 887 888 if (m_gdb_comm.GetProcessArchitecture().IsValid()) 889 gdb_remote_arch = m_gdb_comm.GetProcessArchitecture(); 890 891 if (gdb_remote_arch.IsValid()) 892 { 893 ArchSpec &target_arch = GetTarget().GetArchitecture(); 894 895 if (target_arch.IsValid()) 896 { 897 // If the remote host is ARM and we have apple as the vendor, then 898 // ARM executables and shared libraries can have mixed ARM architectures. 899 // You can have an armv6 executable, and if the host is armv7, then the 900 // system will load the best possible architecture for all shared libraries 901 // it has, so we really need to take the remote host architecture as our 902 // defacto architecture in this case. 903 904 if (gdb_remote_arch.GetMachine() == llvm::Triple::arm && 905 gdb_remote_arch.GetTriple().getVendor() == llvm::Triple::Apple) 906 { 907 target_arch = gdb_remote_arch; 908 } 909 else 910 { 911 // Fill in what is missing in the triple 912 const llvm::Triple &remote_triple = gdb_remote_arch.GetTriple(); 913 llvm::Triple &target_triple = target_arch.GetTriple(); 914 if (target_triple.getVendorName().size() == 0) 915 { 916 target_triple.setVendor (remote_triple.getVendor()); 917 918 if (target_triple.getOSName().size() == 0) 919 { 920 target_triple.setOS (remote_triple.getOS()); 921 922 if (target_triple.getEnvironmentName().size() == 0) 923 target_triple.setEnvironment (remote_triple.getEnvironment()); 924 } 925 } 926 } 927 } 928 else 929 { 930 // The target doesn't have a valid architecture yet, set it from 931 // the architecture we got from the remote GDB server 932 target_arch = gdb_remote_arch; 933 } 934 } 935 } 936 } 937 938 void 939 ProcessGDBRemote::DidLaunch () 940 { 941 DidLaunchOrAttach (); 942 } 943 944 Error 945 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid) 946 { 947 ProcessAttachInfo attach_info; 948 return DoAttachToProcessWithID(attach_pid, attach_info); 949 } 950 951 Error 952 ProcessGDBRemote::DoAttachToProcessWithID (lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) 953 { 954 Error error; 955 // Clear out and clean up from any current state 956 Clear(); 957 if (attach_pid != LLDB_INVALID_PROCESS_ID) 958 { 959 // Make sure we aren't already connected? 960 if (!m_gdb_comm.IsConnected()) 961 { 962 char host_port[128]; 963 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 964 char connect_url[128]; 965 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 966 967 error = StartDebugserverProcess (host_port, attach_info); 968 969 if (error.Fail()) 970 { 971 const char *error_string = error.AsCString(); 972 if (error_string == NULL) 973 error_string = "unable to launch " DEBUGSERVER_BASENAME; 974 975 SetExitStatus (-1, error_string); 976 } 977 else 978 { 979 error = ConnectToDebugserver (connect_url); 980 } 981 } 982 983 if (error.Success()) 984 { 985 char packet[64]; 986 const int packet_len = ::snprintf (packet, sizeof(packet), "vAttach;%" PRIx64, attach_pid); 987 SetID (attach_pid); 988 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet, packet_len)); 989 } 990 } 991 return error; 992 } 993 994 size_t 995 ProcessGDBRemote::AttachInputReaderCallback 996 ( 997 void *baton, 998 InputReader *reader, 999 lldb::InputReaderAction notification, 1000 const char *bytes, 1001 size_t bytes_len 1002 ) 1003 { 1004 if (notification == eInputReaderGotToken) 1005 { 1006 ProcessGDBRemote *gdb_process = (ProcessGDBRemote *)baton; 1007 if (gdb_process->m_waiting_for_attach) 1008 gdb_process->m_waiting_for_attach = false; 1009 reader->SetIsDone(true); 1010 return 1; 1011 } 1012 return 0; 1013 } 1014 1015 Error 1016 ProcessGDBRemote::DoAttachToProcessWithName (const char *process_name, bool wait_for_launch, const ProcessAttachInfo &attach_info) 1017 { 1018 Error error; 1019 // Clear out and clean up from any current state 1020 Clear(); 1021 1022 if (process_name && process_name[0]) 1023 { 1024 // Make sure we aren't already connected? 1025 if (!m_gdb_comm.IsConnected()) 1026 { 1027 char host_port[128]; 1028 snprintf (host_port, sizeof(host_port), "localhost:%u", get_random_port ()); 1029 char connect_url[128]; 1030 snprintf (connect_url, sizeof(connect_url), "connect://%s", host_port); 1031 1032 error = StartDebugserverProcess (host_port, attach_info); 1033 if (error.Fail()) 1034 { 1035 const char *error_string = error.AsCString(); 1036 if (error_string == NULL) 1037 error_string = "unable to launch " DEBUGSERVER_BASENAME; 1038 1039 SetExitStatus (-1, error_string); 1040 } 1041 else 1042 { 1043 error = ConnectToDebugserver (connect_url); 1044 } 1045 } 1046 1047 if (error.Success()) 1048 { 1049 StreamString packet; 1050 1051 if (wait_for_launch) 1052 { 1053 if (!m_gdb_comm.GetVAttachOrWaitSupported()) 1054 { 1055 packet.PutCString ("vAttachWait"); 1056 } 1057 else 1058 { 1059 if (attach_info.GetIgnoreExisting()) 1060 packet.PutCString("vAttachWait"); 1061 else 1062 packet.PutCString ("vAttachOrWait"); 1063 } 1064 } 1065 else 1066 packet.PutCString("vAttachName"); 1067 packet.PutChar(';'); 1068 packet.PutBytesAsRawHex8(process_name, strlen(process_name), lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 1069 1070 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (packet.GetData(), packet.GetSize())); 1071 1072 } 1073 } 1074 return error; 1075 } 1076 1077 1078 void 1079 ProcessGDBRemote::DidAttach () 1080 { 1081 DidLaunchOrAttach (); 1082 } 1083 1084 void 1085 ProcessGDBRemote::DoDidExec () 1086 { 1087 // The process exec'ed itself, figure out the dynamic loader, etc... 1088 BuildDynamicRegisterInfo (true); 1089 m_gdb_comm.ResetDiscoverableSettings(); 1090 DidLaunchOrAttach (); 1091 } 1092 1093 1094 1095 Error 1096 ProcessGDBRemote::WillResume () 1097 { 1098 m_continue_c_tids.clear(); 1099 m_continue_C_tids.clear(); 1100 m_continue_s_tids.clear(); 1101 m_continue_S_tids.clear(); 1102 return Error(); 1103 } 1104 1105 Error 1106 ProcessGDBRemote::DoResume () 1107 { 1108 Error error; 1109 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 1110 if (log) 1111 log->Printf ("ProcessGDBRemote::Resume()"); 1112 1113 Listener listener ("gdb-remote.resume-packet-sent"); 1114 if (listener.StartListeningForEvents (&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) 1115 { 1116 listener.StartListeningForEvents (&m_async_broadcaster, ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit); 1117 1118 StreamString continue_packet; 1119 bool continue_packet_error = false; 1120 if (m_gdb_comm.HasAnyVContSupport ()) 1121 { 1122 continue_packet.PutCString ("vCont"); 1123 1124 if (!m_continue_c_tids.empty()) 1125 { 1126 if (m_gdb_comm.GetVContSupported ('c')) 1127 { 1128 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) 1129 continue_packet.Printf(";c:%4.4" PRIx64, *t_pos); 1130 } 1131 else 1132 continue_packet_error = true; 1133 } 1134 1135 if (!continue_packet_error && !m_continue_C_tids.empty()) 1136 { 1137 if (m_gdb_comm.GetVContSupported ('C')) 1138 { 1139 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) 1140 continue_packet.Printf(";C%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1141 } 1142 else 1143 continue_packet_error = true; 1144 } 1145 1146 if (!continue_packet_error && !m_continue_s_tids.empty()) 1147 { 1148 if (m_gdb_comm.GetVContSupported ('s')) 1149 { 1150 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) 1151 continue_packet.Printf(";s:%4.4" PRIx64, *t_pos); 1152 } 1153 else 1154 continue_packet_error = true; 1155 } 1156 1157 if (!continue_packet_error && !m_continue_S_tids.empty()) 1158 { 1159 if (m_gdb_comm.GetVContSupported ('S')) 1160 { 1161 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) 1162 continue_packet.Printf(";S%2.2x:%4.4" PRIx64, s_pos->second, s_pos->first); 1163 } 1164 else 1165 continue_packet_error = true; 1166 } 1167 1168 if (continue_packet_error) 1169 continue_packet.GetString().clear(); 1170 } 1171 else 1172 continue_packet_error = true; 1173 1174 if (continue_packet_error) 1175 { 1176 // Either no vCont support, or we tried to use part of the vCont 1177 // packet that wasn't supported by the remote GDB server. 1178 // We need to try and make a simple packet that can do our continue 1179 const size_t num_threads = GetThreadList().GetSize(); 1180 const size_t num_continue_c_tids = m_continue_c_tids.size(); 1181 const size_t num_continue_C_tids = m_continue_C_tids.size(); 1182 const size_t num_continue_s_tids = m_continue_s_tids.size(); 1183 const size_t num_continue_S_tids = m_continue_S_tids.size(); 1184 if (num_continue_c_tids > 0) 1185 { 1186 if (num_continue_c_tids == num_threads) 1187 { 1188 // All threads are resuming... 1189 m_gdb_comm.SetCurrentThreadForRun (-1); 1190 continue_packet.PutChar ('c'); 1191 continue_packet_error = false; 1192 } 1193 else if (num_continue_c_tids == 1 && 1194 num_continue_C_tids == 0 && 1195 num_continue_s_tids == 0 && 1196 num_continue_S_tids == 0 ) 1197 { 1198 // Only one thread is continuing 1199 m_gdb_comm.SetCurrentThreadForRun (m_continue_c_tids.front()); 1200 continue_packet.PutChar ('c'); 1201 continue_packet_error = false; 1202 } 1203 } 1204 1205 if (continue_packet_error && num_continue_C_tids > 0) 1206 { 1207 if ((num_continue_C_tids + num_continue_c_tids) == num_threads && 1208 num_continue_C_tids > 0 && 1209 num_continue_s_tids == 0 && 1210 num_continue_S_tids == 0 ) 1211 { 1212 const int continue_signo = m_continue_C_tids.front().second; 1213 // Only one thread is continuing 1214 if (num_continue_C_tids > 1) 1215 { 1216 // More that one thread with a signal, yet we don't have 1217 // vCont support and we are being asked to resume each 1218 // thread with a signal, we need to make sure they are 1219 // all the same signal, or we can't issue the continue 1220 // accurately with the current support... 1221 if (num_continue_C_tids > 1) 1222 { 1223 continue_packet_error = false; 1224 for (size_t i=1; i<m_continue_C_tids.size(); ++i) 1225 { 1226 if (m_continue_C_tids[i].second != continue_signo) 1227 continue_packet_error = true; 1228 } 1229 } 1230 if (!continue_packet_error) 1231 m_gdb_comm.SetCurrentThreadForRun (-1); 1232 } 1233 else 1234 { 1235 // Set the continue thread ID 1236 continue_packet_error = false; 1237 m_gdb_comm.SetCurrentThreadForRun (m_continue_C_tids.front().first); 1238 } 1239 if (!continue_packet_error) 1240 { 1241 // Add threads continuing with the same signo... 1242 continue_packet.Printf("C%2.2x", continue_signo); 1243 } 1244 } 1245 } 1246 1247 if (continue_packet_error && num_continue_s_tids > 0) 1248 { 1249 if (num_continue_s_tids == num_threads) 1250 { 1251 // All threads are resuming... 1252 m_gdb_comm.SetCurrentThreadForRun (-1); 1253 continue_packet.PutChar ('s'); 1254 continue_packet_error = false; 1255 } 1256 else if (num_continue_c_tids == 0 && 1257 num_continue_C_tids == 0 && 1258 num_continue_s_tids == 1 && 1259 num_continue_S_tids == 0 ) 1260 { 1261 // Only one thread is stepping 1262 m_gdb_comm.SetCurrentThreadForRun (m_continue_s_tids.front()); 1263 continue_packet.PutChar ('s'); 1264 continue_packet_error = false; 1265 } 1266 } 1267 1268 if (!continue_packet_error && num_continue_S_tids > 0) 1269 { 1270 if (num_continue_S_tids == num_threads) 1271 { 1272 const int step_signo = m_continue_S_tids.front().second; 1273 // Are all threads trying to step with the same signal? 1274 continue_packet_error = false; 1275 if (num_continue_S_tids > 1) 1276 { 1277 for (size_t i=1; i<num_threads; ++i) 1278 { 1279 if (m_continue_S_tids[i].second != step_signo) 1280 continue_packet_error = true; 1281 } 1282 } 1283 if (!continue_packet_error) 1284 { 1285 // Add threads stepping with the same signo... 1286 m_gdb_comm.SetCurrentThreadForRun (-1); 1287 continue_packet.Printf("S%2.2x", step_signo); 1288 } 1289 } 1290 else if (num_continue_c_tids == 0 && 1291 num_continue_C_tids == 0 && 1292 num_continue_s_tids == 0 && 1293 num_continue_S_tids == 1 ) 1294 { 1295 // Only one thread is stepping with signal 1296 m_gdb_comm.SetCurrentThreadForRun (m_continue_S_tids.front().first); 1297 continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second); 1298 continue_packet_error = false; 1299 } 1300 } 1301 } 1302 1303 if (continue_packet_error) 1304 { 1305 error.SetErrorString ("can't make continue packet for this resume"); 1306 } 1307 else 1308 { 1309 EventSP event_sp; 1310 TimeValue timeout; 1311 timeout = TimeValue::Now(); 1312 timeout.OffsetWithSeconds (5); 1313 if (!IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 1314 { 1315 error.SetErrorString ("Trying to resume but the async thread is dead."); 1316 if (log) 1317 log->Printf ("ProcessGDBRemote::DoResume: Trying to resume but the async thread is dead."); 1318 return error; 1319 } 1320 1321 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncContinue, new EventDataBytes (continue_packet.GetData(), continue_packet.GetSize())); 1322 1323 if (listener.WaitForEvent (&timeout, event_sp) == false) 1324 { 1325 error.SetErrorString("Resume timed out."); 1326 if (log) 1327 log->Printf ("ProcessGDBRemote::DoResume: Resume timed out."); 1328 } 1329 else if (event_sp->BroadcasterIs (&m_async_broadcaster)) 1330 { 1331 error.SetErrorString ("Broadcast continue, but the async thread was killed before we got an ack back."); 1332 if (log) 1333 log->Printf ("ProcessGDBRemote::DoResume: Broadcast continue, but the async thread was killed before we got an ack back."); 1334 return error; 1335 } 1336 } 1337 } 1338 1339 return error; 1340 } 1341 1342 void 1343 ProcessGDBRemote::ClearThreadIDList () 1344 { 1345 Mutex::Locker locker(m_thread_list.GetMutex()); 1346 m_thread_ids.clear(); 1347 } 1348 1349 bool 1350 ProcessGDBRemote::UpdateThreadIDList () 1351 { 1352 Mutex::Locker locker(m_thread_list.GetMutex()); 1353 bool sequence_mutex_unavailable = false; 1354 m_gdb_comm.GetCurrentThreadIDs (m_thread_ids, sequence_mutex_unavailable); 1355 if (sequence_mutex_unavailable) 1356 { 1357 return false; // We just didn't get the list 1358 } 1359 return true; 1360 } 1361 1362 bool 1363 ProcessGDBRemote::UpdateThreadList (ThreadList &old_thread_list, ThreadList &new_thread_list) 1364 { 1365 // locker will keep a mutex locked until it goes out of scope 1366 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_THREAD)); 1367 if (log && log->GetMask().Test(GDBR_LOG_VERBOSE)) 1368 log->Printf ("ProcessGDBRemote::%s (pid = %" PRIu64 ")", __FUNCTION__, GetID()); 1369 1370 size_t num_thread_ids = m_thread_ids.size(); 1371 // The "m_thread_ids" thread ID list should always be updated after each stop 1372 // reply packet, but in case it isn't, update it here. 1373 if (num_thread_ids == 0) 1374 { 1375 if (!UpdateThreadIDList ()) 1376 return false; 1377 num_thread_ids = m_thread_ids.size(); 1378 } 1379 1380 ThreadList old_thread_list_copy(old_thread_list); 1381 if (num_thread_ids > 0) 1382 { 1383 for (size_t i=0; i<num_thread_ids; ++i) 1384 { 1385 tid_t tid = m_thread_ids[i]; 1386 ThreadSP thread_sp (old_thread_list_copy.RemoveThreadByID (tid, false)); 1387 if (!thread_sp) 1388 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1389 new_thread_list.AddThread(thread_sp); 1390 } 1391 } 1392 1393 // Whatever that is left in old_thread_list_copy are not 1394 // present in new_thread_list. Remove non-existent threads from internal id table. 1395 size_t old_num_thread_ids = old_thread_list_copy.GetSize(false); 1396 for (size_t i=0; i<old_num_thread_ids; i++) 1397 { 1398 ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex (i, false)); 1399 if (old_thread_sp) 1400 { 1401 lldb::tid_t old_thread_id = old_thread_sp->GetID(); 1402 m_thread_id_to_index_id_map.erase(old_thread_id); 1403 } 1404 } 1405 1406 return true; 1407 } 1408 1409 1410 StateType 1411 ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet) 1412 { 1413 stop_packet.SetFilePos (0); 1414 const char stop_type = stop_packet.GetChar(); 1415 switch (stop_type) 1416 { 1417 case 'T': 1418 case 'S': 1419 { 1420 if (GetStopID() == 0) 1421 { 1422 // Our first stop, make sure we have a process ID, and also make 1423 // sure we know about our registers 1424 if (GetID() == LLDB_INVALID_PROCESS_ID) 1425 { 1426 lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID (); 1427 if (pid != LLDB_INVALID_PROCESS_ID) 1428 SetID (pid); 1429 } 1430 BuildDynamicRegisterInfo (true); 1431 } 1432 // Stop with signal and thread info 1433 const uint8_t signo = stop_packet.GetHexU8(); 1434 std::string name; 1435 std::string value; 1436 std::string thread_name; 1437 std::string reason; 1438 std::string description; 1439 uint32_t exc_type = 0; 1440 std::vector<addr_t> exc_data; 1441 addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS; 1442 ThreadSP thread_sp; 1443 1444 while (stop_packet.GetNameColonValue(name, value)) 1445 { 1446 if (name.compare("metype") == 0) 1447 { 1448 // exception type in big endian hex 1449 exc_type = Args::StringToUInt32 (value.c_str(), 0, 16); 1450 } 1451 else if (name.compare("medata") == 0) 1452 { 1453 // exception data in big endian hex 1454 exc_data.push_back(Args::StringToUInt64 (value.c_str(), 0, 16)); 1455 } 1456 else if (name.compare("thread") == 0) 1457 { 1458 // thread in big endian hex 1459 lldb::tid_t tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1460 // m_thread_list does have its own mutex, but we need to 1461 // hold onto the mutex between the call to m_thread_list.FindThreadByID(...) 1462 // and the m_thread_list.AddThread(...) so it doesn't change on us 1463 Mutex::Locker locker (m_thread_list.GetMutex ()); 1464 thread_sp = m_thread_list.FindThreadByID(tid, false); 1465 if (!thread_sp) 1466 { 1467 // Create the thread if we need to 1468 thread_sp.reset (new ThreadGDBRemote (*this, tid)); 1469 m_thread_list.AddThread(thread_sp); 1470 } 1471 } 1472 else if (name.compare("threads") == 0) 1473 { 1474 Mutex::Locker locker(m_thread_list.GetMutex()); 1475 m_thread_ids.clear(); 1476 // A comma separated list of all threads in the current 1477 // process that includes the thread for this stop reply 1478 // packet 1479 size_t comma_pos; 1480 lldb::tid_t tid; 1481 while ((comma_pos = value.find(',')) != std::string::npos) 1482 { 1483 value[comma_pos] = '\0'; 1484 // thread in big endian hex 1485 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1486 if (tid != LLDB_INVALID_THREAD_ID) 1487 m_thread_ids.push_back (tid); 1488 value.erase(0, comma_pos + 1); 1489 1490 } 1491 tid = Args::StringToUInt64 (value.c_str(), LLDB_INVALID_THREAD_ID, 16); 1492 if (tid != LLDB_INVALID_THREAD_ID) 1493 m_thread_ids.push_back (tid); 1494 } 1495 else if (name.compare("hexname") == 0) 1496 { 1497 StringExtractor name_extractor; 1498 // Swap "value" over into "name_extractor" 1499 name_extractor.GetStringRef().swap(value); 1500 // Now convert the HEX bytes into a string value 1501 name_extractor.GetHexByteString (value); 1502 thread_name.swap (value); 1503 } 1504 else if (name.compare("name") == 0) 1505 { 1506 thread_name.swap (value); 1507 } 1508 else if (name.compare("qaddr") == 0) 1509 { 1510 thread_dispatch_qaddr = Args::StringToUInt64 (value.c_str(), 0, 16); 1511 } 1512 else if (name.compare("reason") == 0) 1513 { 1514 reason.swap(value); 1515 } 1516 else if (name.compare("description") == 0) 1517 { 1518 StringExtractor desc_extractor; 1519 // Swap "value" over into "name_extractor" 1520 desc_extractor.GetStringRef().swap(value); 1521 // Now convert the HEX bytes into a string value 1522 desc_extractor.GetHexByteString (thread_name); 1523 } 1524 else if (name.size() == 2 && ::isxdigit(name[0]) && ::isxdigit(name[1])) 1525 { 1526 // We have a register number that contains an expedited 1527 // register value. Lets supply this register to our thread 1528 // so it won't have to go and read it. 1529 if (thread_sp) 1530 { 1531 uint32_t reg = Args::StringToUInt32 (name.c_str(), UINT32_MAX, 16); 1532 1533 if (reg != UINT32_MAX) 1534 { 1535 StringExtractor reg_value_extractor; 1536 // Swap "value" over into "reg_value_extractor" 1537 reg_value_extractor.GetStringRef().swap(value); 1538 if (!static_cast<ThreadGDBRemote *> (thread_sp.get())->PrivateSetRegisterValue (reg, reg_value_extractor)) 1539 { 1540 Host::SetCrashDescriptionWithFormat("Setting thread register '%s' (decoded to %u (0x%x)) with value '%s' for stop packet: '%s'", 1541 name.c_str(), 1542 reg, 1543 reg, 1544 reg_value_extractor.GetStringRef().c_str(), 1545 stop_packet.GetStringRef().c_str()); 1546 } 1547 } 1548 } 1549 } 1550 } 1551 1552 if (thread_sp) 1553 { 1554 ThreadGDBRemote *gdb_thread = static_cast<ThreadGDBRemote *> (thread_sp.get()); 1555 1556 gdb_thread->SetThreadDispatchQAddr (thread_dispatch_qaddr); 1557 gdb_thread->SetName (thread_name.empty() ? NULL : thread_name.c_str()); 1558 if (exc_type != 0) 1559 { 1560 const size_t exc_data_size = exc_data.size(); 1561 1562 gdb_thread->SetStopInfo (StopInfoMachException::CreateStopReasonWithMachException (*thread_sp, 1563 exc_type, 1564 exc_data_size, 1565 exc_data_size >= 1 ? exc_data[0] : 0, 1566 exc_data_size >= 2 ? exc_data[1] : 0, 1567 exc_data_size >= 3 ? exc_data[2] : 0)); 1568 } 1569 else 1570 { 1571 bool handled = false; 1572 if (!reason.empty()) 1573 { 1574 if (reason.compare("trace") == 0) 1575 { 1576 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1577 handled = true; 1578 } 1579 else if (reason.compare("breakpoint") == 0) 1580 { 1581 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1582 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1583 if (bp_site_sp) 1584 { 1585 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1586 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1587 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1588 handled = true; 1589 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1590 { 1591 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1592 } 1593 else 1594 { 1595 StopInfoSP invalid_stop_info_sp; 1596 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1597 } 1598 } 1599 1600 } 1601 else if (reason.compare("trap") == 0) 1602 { 1603 // Let the trap just use the standard signal stop reason below... 1604 } 1605 else if (reason.compare("watchpoint") == 0) 1606 { 1607 break_id_t watch_id = LLDB_INVALID_WATCH_ID; 1608 // TODO: locate the watchpoint somehow... 1609 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithWatchpointID (*thread_sp, watch_id)); 1610 handled = true; 1611 } 1612 else if (reason.compare("exception") == 0) 1613 { 1614 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException(*thread_sp, description.c_str())); 1615 handled = true; 1616 } 1617 } 1618 1619 if (signo) 1620 { 1621 if (signo == SIGTRAP) 1622 { 1623 // Currently we are going to assume SIGTRAP means we are either 1624 // hitting a breakpoint or hardware single stepping. 1625 handled = true; 1626 addr_t pc = gdb_thread->GetRegisterContext()->GetPC(); 1627 lldb::BreakpointSiteSP bp_site_sp = gdb_thread->GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 1628 1629 if (bp_site_sp) 1630 { 1631 // If the breakpoint is for this thread, then we'll report the hit, but if it is for another thread, 1632 // we can just report no reason. We don't need to worry about stepping over the breakpoint here, that 1633 // will be taken care of when the thread resumes and notices that there's a breakpoint under the pc. 1634 if (bp_site_sp->ValidForThisThread (gdb_thread)) 1635 { 1636 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithBreakpointSiteID (*thread_sp, bp_site_sp->GetID())); 1637 } 1638 else 1639 { 1640 StopInfoSP invalid_stop_info_sp; 1641 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1642 } 1643 } 1644 else 1645 { 1646 // If we were stepping then assume the stop was the result of the trace. If we were 1647 // not stepping then report the SIGTRAP. 1648 // FIXME: We are still missing the case where we single step over a trap instruction. 1649 if (gdb_thread->GetTemporaryResumeState() == eStateStepping) 1650 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonToTrace (*thread_sp)); 1651 else 1652 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal(*thread_sp, signo)); 1653 } 1654 } 1655 if (!handled) 1656 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithSignal (*thread_sp, signo)); 1657 } 1658 else 1659 { 1660 StopInfoSP invalid_stop_info_sp; 1661 gdb_thread->SetStopInfo (invalid_stop_info_sp); 1662 } 1663 1664 if (!description.empty()) 1665 { 1666 lldb::StopInfoSP stop_info_sp (gdb_thread->GetStopInfo ()); 1667 if (stop_info_sp) 1668 { 1669 stop_info_sp->SetDescription (description.c_str()); 1670 } 1671 else 1672 { 1673 gdb_thread->SetStopInfo (StopInfo::CreateStopReasonWithException (*thread_sp, description.c_str())); 1674 } 1675 } 1676 } 1677 } 1678 return eStateStopped; 1679 } 1680 break; 1681 1682 case 'W': 1683 // process exited 1684 return eStateExited; 1685 1686 default: 1687 break; 1688 } 1689 return eStateInvalid; 1690 } 1691 1692 void 1693 ProcessGDBRemote::RefreshStateAfterStop () 1694 { 1695 Mutex::Locker locker(m_thread_list.GetMutex()); 1696 m_thread_ids.clear(); 1697 // Set the thread stop info. It might have a "threads" key whose value is 1698 // a list of all thread IDs in the current process, so m_thread_ids might 1699 // get set. 1700 SetThreadStopInfo (m_last_stop_packet); 1701 // Check to see if SetThreadStopInfo() filled in m_thread_ids? 1702 if (m_thread_ids.empty()) 1703 { 1704 // No, we need to fetch the thread list manually 1705 UpdateThreadIDList(); 1706 } 1707 1708 // Let all threads recover from stopping and do any clean up based 1709 // on the previous thread state (if any). 1710 m_thread_list.RefreshStateAfterStop(); 1711 1712 } 1713 1714 Error 1715 ProcessGDBRemote::DoHalt (bool &caused_stop) 1716 { 1717 Error error; 1718 1719 bool timed_out = false; 1720 Mutex::Locker locker; 1721 1722 if (m_public_state.GetValue() == eStateAttaching) 1723 { 1724 // We are being asked to halt during an attach. We need to just close 1725 // our file handle and debugserver will go away, and we can be done... 1726 m_gdb_comm.Disconnect(); 1727 } 1728 else 1729 { 1730 if (!m_gdb_comm.SendInterrupt (locker, 2, timed_out)) 1731 { 1732 if (timed_out) 1733 error.SetErrorString("timed out sending interrupt packet"); 1734 else 1735 error.SetErrorString("unknown error sending interrupt packet"); 1736 } 1737 1738 caused_stop = m_gdb_comm.GetInterruptWasSent (); 1739 } 1740 return error; 1741 } 1742 1743 Error 1744 ProcessGDBRemote::InterruptIfRunning 1745 ( 1746 bool discard_thread_plans, 1747 bool catch_stop_event, 1748 EventSP &stop_event_sp 1749 ) 1750 { 1751 Error error; 1752 1753 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1754 1755 bool paused_private_state_thread = false; 1756 const bool is_running = m_gdb_comm.IsRunning(); 1757 if (log) 1758 log->Printf ("ProcessGDBRemote::InterruptIfRunning(discard_thread_plans=%i, catch_stop_event=%i) is_running=%i", 1759 discard_thread_plans, 1760 catch_stop_event, 1761 is_running); 1762 1763 if (discard_thread_plans) 1764 { 1765 if (log) 1766 log->Printf ("ProcessGDBRemote::InterruptIfRunning() discarding all thread plans"); 1767 m_thread_list.DiscardThreadPlans(); 1768 } 1769 if (is_running) 1770 { 1771 if (catch_stop_event) 1772 { 1773 if (log) 1774 log->Printf ("ProcessGDBRemote::InterruptIfRunning() pausing private state thread"); 1775 PausePrivateStateThread(); 1776 paused_private_state_thread = true; 1777 } 1778 1779 bool timed_out = false; 1780 Mutex::Locker locker; 1781 1782 if (!m_gdb_comm.SendInterrupt (locker, 1, timed_out)) 1783 { 1784 if (timed_out) 1785 error.SetErrorString("timed out sending interrupt packet"); 1786 else 1787 error.SetErrorString("unknown error sending interrupt packet"); 1788 if (paused_private_state_thread) 1789 ResumePrivateStateThread(); 1790 return error; 1791 } 1792 1793 if (catch_stop_event) 1794 { 1795 // LISTEN HERE 1796 TimeValue timeout_time; 1797 timeout_time = TimeValue::Now(); 1798 timeout_time.OffsetWithSeconds(5); 1799 StateType state = WaitForStateChangedEventsPrivate (&timeout_time, stop_event_sp); 1800 1801 timed_out = state == eStateInvalid; 1802 if (log) 1803 log->Printf ("ProcessGDBRemote::InterruptIfRunning() catch stop event: state = %s, timed-out=%i", StateAsCString(state), timed_out); 1804 1805 if (timed_out) 1806 error.SetErrorString("unable to verify target stopped"); 1807 } 1808 1809 if (paused_private_state_thread) 1810 { 1811 if (log) 1812 log->Printf ("ProcessGDBRemote::InterruptIfRunning() resuming private state thread"); 1813 ResumePrivateStateThread(); 1814 } 1815 } 1816 return error; 1817 } 1818 1819 Error 1820 ProcessGDBRemote::WillDetach () 1821 { 1822 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1823 if (log) 1824 log->Printf ("ProcessGDBRemote::WillDetach()"); 1825 1826 bool discard_thread_plans = true; 1827 bool catch_stop_event = true; 1828 EventSP event_sp; 1829 1830 // FIXME: InterruptIfRunning should be done in the Process base class, or better still make Halt do what is 1831 // needed. This shouldn't be a feature of a particular plugin. 1832 1833 return InterruptIfRunning (discard_thread_plans, catch_stop_event, event_sp); 1834 } 1835 1836 Error 1837 ProcessGDBRemote::DoDetach() 1838 { 1839 Error error; 1840 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1841 if (log) 1842 log->Printf ("ProcessGDBRemote::DoDetach()"); 1843 1844 DisableAllBreakpointSites (); 1845 1846 m_thread_list.DiscardThreadPlans(); 1847 1848 bool success = m_gdb_comm.Detach (); 1849 if (log) 1850 { 1851 if (success) 1852 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet sent successfully"); 1853 else 1854 log->PutCString ("ProcessGDBRemote::DoDetach() detach packet send failed"); 1855 } 1856 // Sleep for one second to let the process get all detached... 1857 StopAsyncThread (); 1858 1859 SetPrivateState (eStateDetached); 1860 ResumePrivateStateThread(); 1861 1862 //KillDebugserverProcess (); 1863 return error; 1864 } 1865 1866 1867 Error 1868 ProcessGDBRemote::DoDestroy () 1869 { 1870 Error error; 1871 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 1872 if (log) 1873 log->Printf ("ProcessGDBRemote::DoDestroy()"); 1874 1875 // There is a bug in older iOS debugservers where they don't shut down the process 1876 // they are debugging properly. If the process is sitting at a breakpoint or an exception, 1877 // this can cause problems with restarting. So we check to see if any of our threads are stopped 1878 // at a breakpoint, and if so we remove all the breakpoints, resume the process, and THEN 1879 // destroy it again. 1880 // 1881 // Note, we don't have a good way to test the version of debugserver, but I happen to know that 1882 // the set of all the iOS debugservers which don't support GetThreadSuffixSupported() and that of 1883 // the debugservers with this bug are equal. There really should be a better way to test this! 1884 // 1885 // We also use m_destroy_tried_resuming to make sure we only do this once, if we resume and then halt and 1886 // get called here to destroy again and we're still at a breakpoint or exception, then we should 1887 // just do the straight-forward kill. 1888 // 1889 // And of course, if we weren't able to stop the process by the time we get here, it isn't 1890 // necessary (or helpful) to do any of this. 1891 1892 if (!m_gdb_comm.GetThreadSuffixSupported() && m_public_state.GetValue() != eStateRunning) 1893 { 1894 PlatformSP platform_sp = GetTarget().GetPlatform(); 1895 1896 // FIXME: These should be ConstStrings so we aren't doing strcmp'ing. 1897 if (platform_sp 1898 && platform_sp->GetName() 1899 && strcmp (platform_sp->GetName(), PlatformRemoteiOS::GetShortPluginNameStatic()) == 0) 1900 { 1901 if (m_destroy_tried_resuming) 1902 { 1903 if (log) 1904 log->PutCString ("ProcessGDBRemote::DoDestroy()Tried resuming to destroy once already, not doing it again."); 1905 } 1906 else 1907 { 1908 // At present, the plans are discarded and the breakpoints disabled Process::Destroy, 1909 // but we really need it to happen here and it doesn't matter if we do it twice. 1910 m_thread_list.DiscardThreadPlans(); 1911 DisableAllBreakpointSites(); 1912 1913 bool stop_looks_like_crash = false; 1914 ThreadList &threads = GetThreadList(); 1915 1916 { 1917 Mutex::Locker locker(threads.GetMutex()); 1918 1919 size_t num_threads = threads.GetSize(); 1920 for (size_t i = 0; i < num_threads; i++) 1921 { 1922 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1923 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1924 StopReason reason = eStopReasonInvalid; 1925 if (stop_info_sp) 1926 reason = stop_info_sp->GetStopReason(); 1927 if (reason == eStopReasonBreakpoint 1928 || reason == eStopReasonException) 1929 { 1930 if (log) 1931 log->Printf ("ProcessGDBRemote::DoDestroy() - thread: %" PRId64 " stopped with reason: %s.", 1932 thread_sp->GetID(), 1933 stop_info_sp->GetDescription()); 1934 stop_looks_like_crash = true; 1935 break; 1936 } 1937 } 1938 } 1939 1940 if (stop_looks_like_crash) 1941 { 1942 if (log) 1943 log->PutCString ("ProcessGDBRemote::DoDestroy() - Stopped at a breakpoint, continue and then kill."); 1944 m_destroy_tried_resuming = true; 1945 1946 // If we are going to run again before killing, it would be good to suspend all the threads 1947 // before resuming so they won't get into more trouble. Sadly, for the threads stopped with 1948 // the breakpoint or exception, the exception doesn't get cleared if it is suspended, so we do 1949 // have to run the risk of letting those threads proceed a bit. 1950 1951 { 1952 Mutex::Locker locker(threads.GetMutex()); 1953 1954 size_t num_threads = threads.GetSize(); 1955 for (size_t i = 0; i < num_threads; i++) 1956 { 1957 ThreadSP thread_sp = threads.GetThreadAtIndex(i); 1958 StopInfoSP stop_info_sp = thread_sp->GetPrivateStopReason(); 1959 StopReason reason = eStopReasonInvalid; 1960 if (stop_info_sp) 1961 reason = stop_info_sp->GetStopReason(); 1962 if (reason != eStopReasonBreakpoint 1963 && reason != eStopReasonException) 1964 { 1965 if (log) 1966 log->Printf ("ProcessGDBRemote::DoDestroy() - Suspending thread: %" PRId64 " before running.", 1967 thread_sp->GetID()); 1968 thread_sp->SetResumeState(eStateSuspended); 1969 } 1970 } 1971 } 1972 Resume (); 1973 return Destroy(); 1974 } 1975 } 1976 } 1977 } 1978 1979 // Interrupt if our inferior is running... 1980 int exit_status = SIGABRT; 1981 std::string exit_string; 1982 1983 if (m_gdb_comm.IsConnected()) 1984 { 1985 if (m_public_state.GetValue() != eStateAttaching) 1986 { 1987 1988 StringExtractorGDBRemote response; 1989 bool send_async = true; 1990 const uint32_t old_packet_timeout = m_gdb_comm.SetPacketTimeout (3); 1991 1992 if (m_gdb_comm.SendPacketAndWaitForResponse("k", 1, response, send_async)) 1993 { 1994 char packet_cmd = response.GetChar(0); 1995 1996 if (packet_cmd == 'W' || packet_cmd == 'X') 1997 { 1998 SetLastStopPacket (response); 1999 ClearThreadIDList (); 2000 exit_status = response.GetHexU8(); 2001 } 2002 else 2003 { 2004 if (log) 2005 log->Printf ("ProcessGDBRemote::DoDestroy - got unexpected response to k packet: %s", response.GetStringRef().c_str()); 2006 exit_string.assign("got unexpected response to k packet: "); 2007 exit_string.append(response.GetStringRef()); 2008 } 2009 } 2010 else 2011 { 2012 if (log) 2013 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2014 exit_string.assign("failed to send the k packet"); 2015 } 2016 2017 m_gdb_comm.SetPacketTimeout(old_packet_timeout); 2018 } 2019 else 2020 { 2021 if (log) 2022 log->Printf ("ProcessGDBRemote::DoDestroy - failed to send k packet"); 2023 exit_string.assign ("killed or interrupted while attaching."); 2024 } 2025 } 2026 else 2027 { 2028 // If we missed setting the exit status on the way out, do it here. 2029 // NB set exit status can be called multiple times, the first one sets the status. 2030 exit_string.assign("destroying when not connected to debugserver"); 2031 } 2032 2033 SetExitStatus(exit_status, exit_string.c_str()); 2034 2035 StopAsyncThread (); 2036 KillDebugserverProcess (); 2037 return error; 2038 } 2039 2040 //------------------------------------------------------------------ 2041 // Process Queries 2042 //------------------------------------------------------------------ 2043 2044 bool 2045 ProcessGDBRemote::IsAlive () 2046 { 2047 return m_gdb_comm.IsConnected() && m_private_state.GetValue() != eStateExited; 2048 } 2049 2050 // For kernel debugging, we return the load address of the kernel binary as the 2051 // ImageInfoAddress and we return the DynamicLoaderDarwinKernel as the GetDynamicLoader() 2052 // name so the correct DynamicLoader plugin is chosen. 2053 addr_t 2054 ProcessGDBRemote::GetImageInfoAddress() 2055 { 2056 if (m_kernel_load_addr != LLDB_INVALID_ADDRESS) 2057 return m_kernel_load_addr; 2058 else 2059 return m_gdb_comm.GetShlibInfoAddr(); 2060 } 2061 2062 //------------------------------------------------------------------ 2063 // Process Memory 2064 //------------------------------------------------------------------ 2065 size_t 2066 ProcessGDBRemote::DoReadMemory (addr_t addr, void *buf, size_t size, Error &error) 2067 { 2068 if (size > m_max_memory_size) 2069 { 2070 // Keep memory read sizes down to a sane limit. This function will be 2071 // called multiple times in order to complete the task by 2072 // lldb_private::Process so it is ok to do this. 2073 size = m_max_memory_size; 2074 } 2075 2076 char packet[64]; 2077 const int packet_len = ::snprintf (packet, sizeof(packet), "m%" PRIx64 ",%" PRIx64, (uint64_t)addr, (uint64_t)size); 2078 assert (packet_len + 1 < sizeof(packet)); 2079 StringExtractorGDBRemote response; 2080 if (m_gdb_comm.SendPacketAndWaitForResponse(packet, packet_len, response, true)) 2081 { 2082 if (response.IsNormalResponse()) 2083 { 2084 error.Clear(); 2085 return response.GetHexBytes(buf, size, '\xdd'); 2086 } 2087 else if (response.IsErrorResponse()) 2088 error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64, addr); 2089 else if (response.IsUnsupportedResponse()) 2090 error.SetErrorStringWithFormat("GDB server does not support reading memory"); 2091 else 2092 error.SetErrorStringWithFormat("unexpected response to GDB server memory read packet '%s': '%s'", packet, response.GetStringRef().c_str()); 2093 } 2094 else 2095 { 2096 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet); 2097 } 2098 return 0; 2099 } 2100 2101 size_t 2102 ProcessGDBRemote::DoWriteMemory (addr_t addr, const void *buf, size_t size, Error &error) 2103 { 2104 if (size > m_max_memory_size) 2105 { 2106 // Keep memory read sizes down to a sane limit. This function will be 2107 // called multiple times in order to complete the task by 2108 // lldb_private::Process so it is ok to do this. 2109 size = m_max_memory_size; 2110 } 2111 2112 StreamString packet; 2113 packet.Printf("M%" PRIx64 ",%" PRIx64 ":", addr, (uint64_t)size); 2114 packet.PutBytesAsRawHex8(buf, size, lldb::endian::InlHostByteOrder(), lldb::endian::InlHostByteOrder()); 2115 StringExtractorGDBRemote response; 2116 if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetData(), packet.GetSize(), response, true)) 2117 { 2118 if (response.IsOKResponse()) 2119 { 2120 error.Clear(); 2121 return size; 2122 } 2123 else if (response.IsErrorResponse()) 2124 error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64, addr); 2125 else if (response.IsUnsupportedResponse()) 2126 error.SetErrorStringWithFormat("GDB server does not support writing memory"); 2127 else 2128 error.SetErrorStringWithFormat("unexpected response to GDB server memory write packet '%s': '%s'", packet.GetString().c_str(), response.GetStringRef().c_str()); 2129 } 2130 else 2131 { 2132 error.SetErrorStringWithFormat("failed to sent packet: '%s'", packet.GetString().c_str()); 2133 } 2134 return 0; 2135 } 2136 2137 lldb::addr_t 2138 ProcessGDBRemote::DoAllocateMemory (size_t size, uint32_t permissions, Error &error) 2139 { 2140 addr_t allocated_addr = LLDB_INVALID_ADDRESS; 2141 2142 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2143 switch (supported) 2144 { 2145 case eLazyBoolCalculate: 2146 case eLazyBoolYes: 2147 allocated_addr = m_gdb_comm.AllocateMemory (size, permissions); 2148 if (allocated_addr != LLDB_INVALID_ADDRESS || supported == eLazyBoolYes) 2149 return allocated_addr; 2150 2151 case eLazyBoolNo: 2152 // Call mmap() to create memory in the inferior.. 2153 unsigned prot = 0; 2154 if (permissions & lldb::ePermissionsReadable) 2155 prot |= eMmapProtRead; 2156 if (permissions & lldb::ePermissionsWritable) 2157 prot |= eMmapProtWrite; 2158 if (permissions & lldb::ePermissionsExecutable) 2159 prot |= eMmapProtExec; 2160 2161 if (InferiorCallMmap(this, allocated_addr, 0, size, prot, 2162 eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0)) 2163 m_addr_to_mmap_size[allocated_addr] = size; 2164 else 2165 allocated_addr = LLDB_INVALID_ADDRESS; 2166 break; 2167 } 2168 2169 if (allocated_addr == LLDB_INVALID_ADDRESS) 2170 error.SetErrorStringWithFormat("unable to allocate %" PRIu64 " bytes of memory with permissions %s", (uint64_t)size, GetPermissionsAsCString (permissions)); 2171 else 2172 error.Clear(); 2173 return allocated_addr; 2174 } 2175 2176 Error 2177 ProcessGDBRemote::GetMemoryRegionInfo (addr_t load_addr, 2178 MemoryRegionInfo ®ion_info) 2179 { 2180 2181 Error error (m_gdb_comm.GetMemoryRegionInfo (load_addr, region_info)); 2182 return error; 2183 } 2184 2185 Error 2186 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num) 2187 { 2188 2189 Error error (m_gdb_comm.GetWatchpointSupportInfo (num)); 2190 return error; 2191 } 2192 2193 Error 2194 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after) 2195 { 2196 Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after)); 2197 return error; 2198 } 2199 2200 Error 2201 ProcessGDBRemote::DoDeallocateMemory (lldb::addr_t addr) 2202 { 2203 Error error; 2204 LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory(); 2205 2206 switch (supported) 2207 { 2208 case eLazyBoolCalculate: 2209 // We should never be deallocating memory without allocating memory 2210 // first so we should never get eLazyBoolCalculate 2211 error.SetErrorString ("tried to deallocate memory without ever allocating memory"); 2212 break; 2213 2214 case eLazyBoolYes: 2215 if (!m_gdb_comm.DeallocateMemory (addr)) 2216 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2217 break; 2218 2219 case eLazyBoolNo: 2220 // Call munmap() to deallocate memory in the inferior.. 2221 { 2222 MMapMap::iterator pos = m_addr_to_mmap_size.find(addr); 2223 if (pos != m_addr_to_mmap_size.end() && 2224 InferiorCallMunmap(this, addr, pos->second)) 2225 m_addr_to_mmap_size.erase (pos); 2226 else 2227 error.SetErrorStringWithFormat("unable to deallocate memory at 0x%" PRIx64, addr); 2228 } 2229 break; 2230 } 2231 2232 return error; 2233 } 2234 2235 2236 //------------------------------------------------------------------ 2237 // Process STDIO 2238 //------------------------------------------------------------------ 2239 size_t 2240 ProcessGDBRemote::PutSTDIN (const char *src, size_t src_len, Error &error) 2241 { 2242 if (m_stdio_communication.IsConnected()) 2243 { 2244 ConnectionStatus status; 2245 m_stdio_communication.Write(src, src_len, status, NULL); 2246 } 2247 return 0; 2248 } 2249 2250 Error 2251 ProcessGDBRemote::EnableBreakpoint (BreakpointSite *bp_site) 2252 { 2253 Error error; 2254 assert (bp_site != NULL); 2255 2256 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2257 user_id_t site_id = bp_site->GetID(); 2258 const addr_t addr = bp_site->GetLoadAddress(); 2259 if (log) 2260 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %" PRIu64 ") address = 0x%" PRIx64, site_id, (uint64_t)addr); 2261 2262 if (bp_site->IsEnabled()) 2263 { 2264 if (log) 2265 log->Printf ("ProcessGDBRemote::EnableBreakpoint (size_id = %" PRIu64 ") address = 0x%" PRIx64 " -- SUCCESS (already enabled)", site_id, (uint64_t)addr); 2266 return error; 2267 } 2268 else 2269 { 2270 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2271 2272 if (bp_site->HardwarePreferred()) 2273 { 2274 // Try and set hardware breakpoint, and if that fails, fall through 2275 // and set a software breakpoint? 2276 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointHardware)) 2277 { 2278 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, true, addr, bp_op_size) == 0) 2279 { 2280 bp_site->SetEnabled(true); 2281 bp_site->SetType (BreakpointSite::eHardware); 2282 return error; 2283 } 2284 } 2285 } 2286 2287 if (m_gdb_comm.SupportsGDBStoppointPacket (eBreakpointSoftware)) 2288 { 2289 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, true, addr, bp_op_size) == 0) 2290 { 2291 bp_site->SetEnabled(true); 2292 bp_site->SetType (BreakpointSite::eExternal); 2293 return error; 2294 } 2295 } 2296 2297 return EnableSoftwareBreakpoint (bp_site); 2298 } 2299 2300 if (log) 2301 { 2302 const char *err_string = error.AsCString(); 2303 log->Printf ("ProcessGDBRemote::EnableBreakpoint() error for breakpoint at 0x%8.8" PRIx64 ": %s", 2304 bp_site->GetLoadAddress(), 2305 err_string ? err_string : "NULL"); 2306 } 2307 // We shouldn't reach here on a successful breakpoint enable... 2308 if (error.Success()) 2309 error.SetErrorToGenericError(); 2310 return error; 2311 } 2312 2313 Error 2314 ProcessGDBRemote::DisableBreakpoint (BreakpointSite *bp_site) 2315 { 2316 Error error; 2317 assert (bp_site != NULL); 2318 addr_t addr = bp_site->GetLoadAddress(); 2319 user_id_t site_id = bp_site->GetID(); 2320 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS)); 2321 if (log) 2322 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64, site_id, (uint64_t)addr); 2323 2324 if (bp_site->IsEnabled()) 2325 { 2326 const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode (bp_site); 2327 2328 BreakpointSite::Type bp_type = bp_site->GetType(); 2329 switch (bp_type) 2330 { 2331 case BreakpointSite::eSoftware: 2332 error = DisableSoftwareBreakpoint (bp_site); 2333 break; 2334 2335 case BreakpointSite::eHardware: 2336 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2337 error.SetErrorToGenericError(); 2338 break; 2339 2340 case BreakpointSite::eExternal: 2341 if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false, addr, bp_op_size)) 2342 error.SetErrorToGenericError(); 2343 break; 2344 } 2345 if (error.Success()) 2346 bp_site->SetEnabled(false); 2347 } 2348 else 2349 { 2350 if (log) 2351 log->Printf ("ProcessGDBRemote::DisableBreakpoint (site_id = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", site_id, (uint64_t)addr); 2352 return error; 2353 } 2354 2355 if (error.Success()) 2356 error.SetErrorToGenericError(); 2357 return error; 2358 } 2359 2360 // Pre-requisite: wp != NULL. 2361 static GDBStoppointType 2362 GetGDBStoppointType (Watchpoint *wp) 2363 { 2364 assert(wp); 2365 bool watch_read = wp->WatchpointRead(); 2366 bool watch_write = wp->WatchpointWrite(); 2367 2368 // watch_read and watch_write cannot both be false. 2369 assert(watch_read || watch_write); 2370 if (watch_read && watch_write) 2371 return eWatchpointReadWrite; 2372 else if (watch_read) 2373 return eWatchpointRead; 2374 else // Must be watch_write, then. 2375 return eWatchpointWrite; 2376 } 2377 2378 Error 2379 ProcessGDBRemote::EnableWatchpoint (Watchpoint *wp, bool notify) 2380 { 2381 Error error; 2382 if (wp) 2383 { 2384 user_id_t watchID = wp->GetID(); 2385 addr_t addr = wp->GetLoadAddress(); 2386 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2387 if (log) 2388 log->Printf ("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")", watchID); 2389 if (wp->IsEnabled()) 2390 { 2391 if (log) 2392 log->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.", watchID, (uint64_t)addr); 2393 return error; 2394 } 2395 2396 GDBStoppointType type = GetGDBStoppointType(wp); 2397 // Pass down an appropriate z/Z packet... 2398 if (m_gdb_comm.SupportsGDBStoppointPacket (type)) 2399 { 2400 if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr, wp->GetByteSize()) == 0) 2401 { 2402 wp->SetEnabled(true, notify); 2403 return error; 2404 } 2405 else 2406 error.SetErrorString("sending gdb watchpoint packet failed"); 2407 } 2408 else 2409 error.SetErrorString("watchpoints not supported"); 2410 } 2411 else 2412 { 2413 error.SetErrorString("Watchpoint argument was NULL."); 2414 } 2415 if (error.Success()) 2416 error.SetErrorToGenericError(); 2417 return error; 2418 } 2419 2420 Error 2421 ProcessGDBRemote::DisableWatchpoint (Watchpoint *wp, bool notify) 2422 { 2423 Error error; 2424 if (wp) 2425 { 2426 user_id_t watchID = wp->GetID(); 2427 2428 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS)); 2429 2430 addr_t addr = wp->GetLoadAddress(); 2431 2432 if (log) 2433 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64, watchID, (uint64_t)addr); 2434 2435 if (!wp->IsEnabled()) 2436 { 2437 if (log) 2438 log->Printf ("ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64 ") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)", watchID, (uint64_t)addr); 2439 // See also 'class WatchpointSentry' within StopInfo.cpp. 2440 // This disabling attempt might come from the user-supplied actions, we'll route it in order for 2441 // the watchpoint object to intelligently process this action. 2442 wp->SetEnabled(false, notify); 2443 return error; 2444 } 2445 2446 if (wp->IsHardware()) 2447 { 2448 GDBStoppointType type = GetGDBStoppointType(wp); 2449 // Pass down an appropriate z/Z packet... 2450 if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr, wp->GetByteSize()) == 0) 2451 { 2452 wp->SetEnabled(false, notify); 2453 return error; 2454 } 2455 else 2456 error.SetErrorString("sending gdb watchpoint packet failed"); 2457 } 2458 // TODO: clear software watchpoints if we implement them 2459 } 2460 else 2461 { 2462 error.SetErrorString("Watchpoint argument was NULL."); 2463 } 2464 if (error.Success()) 2465 error.SetErrorToGenericError(); 2466 return error; 2467 } 2468 2469 void 2470 ProcessGDBRemote::Clear() 2471 { 2472 m_flags = 0; 2473 m_thread_list.Clear(); 2474 } 2475 2476 Error 2477 ProcessGDBRemote::DoSignal (int signo) 2478 { 2479 Error error; 2480 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2481 if (log) 2482 log->Printf ("ProcessGDBRemote::DoSignal (signal = %d)", signo); 2483 2484 if (!m_gdb_comm.SendAsyncSignal (signo)) 2485 error.SetErrorStringWithFormat("failed to send signal %i", signo); 2486 return error; 2487 } 2488 2489 Error 2490 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url) 2491 { 2492 ProcessLaunchInfo launch_info; 2493 return StartDebugserverProcess(debugserver_url, launch_info); 2494 } 2495 2496 Error 2497 ProcessGDBRemote::StartDebugserverProcess (const char *debugserver_url, const ProcessInfo &process_info) // The connection string to use in the spawned debugserver ("localhost:1234" or "/dev/tty...") 2498 { 2499 Error error; 2500 if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID) 2501 { 2502 // If we locate debugserver, keep that located version around 2503 static FileSpec g_debugserver_file_spec; 2504 2505 ProcessLaunchInfo debugserver_launch_info; 2506 char debugserver_path[PATH_MAX]; 2507 FileSpec &debugserver_file_spec = debugserver_launch_info.GetExecutableFile(); 2508 2509 // Always check to see if we have an environment override for the path 2510 // to the debugserver to use and use it if we do. 2511 const char *env_debugserver_path = getenv("LLDB_DEBUGSERVER_PATH"); 2512 if (env_debugserver_path) 2513 debugserver_file_spec.SetFile (env_debugserver_path, false); 2514 else 2515 debugserver_file_spec = g_debugserver_file_spec; 2516 bool debugserver_exists = debugserver_file_spec.Exists(); 2517 if (!debugserver_exists) 2518 { 2519 // The debugserver binary is in the LLDB.framework/Resources 2520 // directory. 2521 if (Host::GetLLDBPath (ePathTypeSupportExecutableDir, debugserver_file_spec)) 2522 { 2523 debugserver_file_spec.GetFilename().SetCString(DEBUGSERVER_BASENAME); 2524 debugserver_exists = debugserver_file_spec.Exists(); 2525 if (debugserver_exists) 2526 { 2527 g_debugserver_file_spec = debugserver_file_spec; 2528 } 2529 else 2530 { 2531 g_debugserver_file_spec.Clear(); 2532 debugserver_file_spec.Clear(); 2533 } 2534 } 2535 } 2536 2537 if (debugserver_exists) 2538 { 2539 debugserver_file_spec.GetPath (debugserver_path, sizeof(debugserver_path)); 2540 2541 m_stdio_communication.Clear(); 2542 2543 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2544 2545 Args &debugserver_args = debugserver_launch_info.GetArguments(); 2546 char arg_cstr[PATH_MAX]; 2547 2548 // Start args with "debugserver /file/path -r --" 2549 debugserver_args.AppendArgument(debugserver_path); 2550 debugserver_args.AppendArgument(debugserver_url); 2551 // use native registers, not the GDB registers 2552 debugserver_args.AppendArgument("--native-regs"); 2553 // make debugserver run in its own session so signals generated by 2554 // special terminal key sequences (^C) don't affect debugserver 2555 debugserver_args.AppendArgument("--setsid"); 2556 2557 const char *env_debugserver_log_file = getenv("LLDB_DEBUGSERVER_LOG_FILE"); 2558 if (env_debugserver_log_file) 2559 { 2560 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-file=%s", env_debugserver_log_file); 2561 debugserver_args.AppendArgument(arg_cstr); 2562 } 2563 2564 const char *env_debugserver_log_flags = getenv("LLDB_DEBUGSERVER_LOG_FLAGS"); 2565 if (env_debugserver_log_flags) 2566 { 2567 ::snprintf (arg_cstr, sizeof(arg_cstr), "--log-flags=%s", env_debugserver_log_flags); 2568 debugserver_args.AppendArgument(arg_cstr); 2569 } 2570 // debugserver_args.AppendArgument("--log-file=/tmp/debugserver.txt"); 2571 // debugserver_args.AppendArgument("--log-flags=0x802e0e"); 2572 2573 // We currently send down all arguments, attach pids, or attach 2574 // process names in dedicated GDB server packets, so we don't need 2575 // to pass them as arguments. This is currently because of all the 2576 // things we need to setup prior to launching: the environment, 2577 // current working dir, file actions, etc. 2578 #if 0 2579 // Now append the program arguments 2580 if (inferior_argv) 2581 { 2582 // Terminate the debugserver args so we can now append the inferior args 2583 debugserver_args.AppendArgument("--"); 2584 2585 for (int i = 0; inferior_argv[i] != NULL; ++i) 2586 debugserver_args.AppendArgument (inferior_argv[i]); 2587 } 2588 else if (attach_pid != LLDB_INVALID_PROCESS_ID) 2589 { 2590 ::snprintf (arg_cstr, sizeof(arg_cstr), "--attach=%u", attach_pid); 2591 debugserver_args.AppendArgument (arg_cstr); 2592 } 2593 else if (attach_name && attach_name[0]) 2594 { 2595 if (wait_for_launch) 2596 debugserver_args.AppendArgument ("--waitfor"); 2597 else 2598 debugserver_args.AppendArgument ("--attach"); 2599 debugserver_args.AppendArgument (attach_name); 2600 } 2601 #endif 2602 2603 ProcessLaunchInfo::FileAction file_action; 2604 2605 // Close STDIN, STDOUT and STDERR. We might need to redirect them 2606 // to "/dev/null" if we run into any problems. 2607 file_action.Close (STDIN_FILENO); 2608 debugserver_launch_info.AppendFileAction (file_action); 2609 file_action.Close (STDOUT_FILENO); 2610 debugserver_launch_info.AppendFileAction (file_action); 2611 file_action.Close (STDERR_FILENO); 2612 debugserver_launch_info.AppendFileAction (file_action); 2613 2614 if (log) 2615 { 2616 StreamString strm; 2617 debugserver_args.Dump (&strm); 2618 log->Printf("%s arguments:\n%s", debugserver_args.GetArgumentAtIndex(0), strm.GetData()); 2619 } 2620 2621 debugserver_launch_info.SetMonitorProcessCallback (MonitorDebugserverProcess, this, false); 2622 debugserver_launch_info.SetUserID(process_info.GetUserID()); 2623 2624 error = Host::LaunchProcess(debugserver_launch_info); 2625 2626 if (error.Success ()) 2627 m_debugserver_pid = debugserver_launch_info.GetProcessID(); 2628 else 2629 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2630 2631 if (error.Fail() || log) 2632 error.PutToLog(log.get(), "Host::LaunchProcess (launch_info) => pid=%" PRIu64 ", path='%s'", m_debugserver_pid, debugserver_path); 2633 } 2634 else 2635 { 2636 error.SetErrorStringWithFormat ("unable to locate " DEBUGSERVER_BASENAME); 2637 } 2638 2639 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2640 StartAsyncThread (); 2641 } 2642 return error; 2643 } 2644 2645 bool 2646 ProcessGDBRemote::MonitorDebugserverProcess 2647 ( 2648 void *callback_baton, 2649 lldb::pid_t debugserver_pid, 2650 bool exited, // True if the process did exit 2651 int signo, // Zero for no signal 2652 int exit_status // Exit value of process if signal is zero 2653 ) 2654 { 2655 // The baton is a "ProcessGDBRemote *". Now this class might be gone 2656 // and might not exist anymore, so we need to carefully try to get the 2657 // target for this process first since we have a race condition when 2658 // we are done running between getting the notice that the inferior 2659 // process has died and the debugserver that was debugging this process. 2660 // In our test suite, we are also continually running process after 2661 // process, so we must be very careful to make sure: 2662 // 1 - process object hasn't been deleted already 2663 // 2 - that a new process object hasn't been recreated in its place 2664 2665 // "debugserver_pid" argument passed in is the process ID for 2666 // debugserver that we are tracking... 2667 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2668 2669 ProcessGDBRemote *process = (ProcessGDBRemote *)callback_baton; 2670 2671 // Get a shared pointer to the target that has a matching process pointer. 2672 // This target could be gone, or the target could already have a new process 2673 // object inside of it 2674 TargetSP target_sp (Debugger::FindTargetWithProcess(process)); 2675 2676 if (log) 2677 log->Printf ("ProcessGDBRemote::MonitorDebugserverProcess (baton=%p, pid=%" PRIu64 ", signo=%i (0x%x), exit_status=%i)", callback_baton, debugserver_pid, signo, signo, exit_status); 2678 2679 if (target_sp) 2680 { 2681 // We found a process in a target that matches, but another thread 2682 // might be in the process of launching a new process that will 2683 // soon replace it, so get a shared pointer to the process so we 2684 // can keep it alive. 2685 ProcessSP process_sp (target_sp->GetProcessSP()); 2686 // Now we have a shared pointer to the process that can't go away on us 2687 // so we now make sure it was the same as the one passed in, and also make 2688 // sure that our previous "process *" didn't get deleted and have a new 2689 // "process *" created in its place with the same pointer. To verify this 2690 // we make sure the process has our debugserver process ID. If we pass all 2691 // of these tests, then we are sure that this process is the one we were 2692 // looking for. 2693 if (process_sp && process == process_sp.get() && process->m_debugserver_pid == debugserver_pid) 2694 { 2695 // Sleep for a half a second to make sure our inferior process has 2696 // time to set its exit status before we set it incorrectly when 2697 // both the debugserver and the inferior process shut down. 2698 usleep (500000); 2699 // If our process hasn't yet exited, debugserver might have died. 2700 // If the process did exit, the we are reaping it. 2701 const StateType state = process->GetState(); 2702 2703 if (process->m_debugserver_pid != LLDB_INVALID_PROCESS_ID && 2704 state != eStateInvalid && 2705 state != eStateUnloaded && 2706 state != eStateExited && 2707 state != eStateDetached) 2708 { 2709 char error_str[1024]; 2710 if (signo) 2711 { 2712 const char *signal_cstr = process->GetUnixSignals().GetSignalAsCString (signo); 2713 if (signal_cstr) 2714 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %s", signal_cstr); 2715 else 2716 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with signal %i", signo); 2717 } 2718 else 2719 { 2720 ::snprintf (error_str, sizeof (error_str), DEBUGSERVER_BASENAME " died with an exit status of 0x%8.8x", exit_status); 2721 } 2722 2723 process->SetExitStatus (-1, error_str); 2724 } 2725 // Debugserver has exited we need to let our ProcessGDBRemote 2726 // know that it no longer has a debugserver instance 2727 process->m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2728 } 2729 } 2730 return true; 2731 } 2732 2733 void 2734 ProcessGDBRemote::KillDebugserverProcess () 2735 { 2736 if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID) 2737 { 2738 ::kill (m_debugserver_pid, SIGINT); 2739 m_debugserver_pid = LLDB_INVALID_PROCESS_ID; 2740 } 2741 } 2742 2743 void 2744 ProcessGDBRemote::Initialize() 2745 { 2746 static bool g_initialized = false; 2747 2748 if (g_initialized == false) 2749 { 2750 g_initialized = true; 2751 PluginManager::RegisterPlugin (GetPluginNameStatic(), 2752 GetPluginDescriptionStatic(), 2753 CreateInstance); 2754 2755 Log::Callbacks log_callbacks = { 2756 ProcessGDBRemoteLog::DisableLog, 2757 ProcessGDBRemoteLog::EnableLog, 2758 ProcessGDBRemoteLog::ListLogCategories 2759 }; 2760 2761 Log::RegisterLogChannel (ProcessGDBRemote::GetPluginNameStatic(), log_callbacks); 2762 } 2763 } 2764 2765 bool 2766 ProcessGDBRemote::StartAsyncThread () 2767 { 2768 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2769 2770 if (log) 2771 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2772 2773 Mutex::Locker start_locker(m_async_thread_state_mutex); 2774 if (m_async_thread_state == eAsyncThreadNotStarted) 2775 { 2776 // Create a thread that watches our internal state and controls which 2777 // events make it to clients (into the DCProcess event queue). 2778 m_async_thread = Host::ThreadCreate ("<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this, NULL); 2779 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2780 { 2781 m_async_thread_state = eAsyncThreadRunning; 2782 return true; 2783 } 2784 else 2785 return false; 2786 } 2787 else 2788 { 2789 // Somebody tried to start the async thread while it was either being started or stopped. If the former, and 2790 // it started up successfully, then say all's well. Otherwise it is an error, since we aren't going to restart it. 2791 if (log) 2792 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2793 if (m_async_thread_state == eAsyncThreadRunning) 2794 return true; 2795 else 2796 return false; 2797 } 2798 } 2799 2800 void 2801 ProcessGDBRemote::StopAsyncThread () 2802 { 2803 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS)); 2804 2805 if (log) 2806 log->Printf ("ProcessGDBRemote::%s ()", __FUNCTION__); 2807 2808 Mutex::Locker start_locker(m_async_thread_state_mutex); 2809 if (m_async_thread_state == eAsyncThreadRunning) 2810 { 2811 m_async_broadcaster.BroadcastEvent (eBroadcastBitAsyncThreadShouldExit); 2812 2813 // This will shut down the async thread. 2814 m_gdb_comm.Disconnect(); // Disconnect from the debug server. 2815 2816 // Stop the stdio thread 2817 if (IS_VALID_LLDB_HOST_THREAD(m_async_thread)) 2818 { 2819 Host::ThreadJoin (m_async_thread, NULL, NULL); 2820 } 2821 m_async_thread_state = eAsyncThreadDone; 2822 } 2823 else 2824 { 2825 if (log) 2826 log->Printf ("ProcessGDBRemote::%s () - Called when Async thread was in state: %d.", __FUNCTION__, m_async_thread_state); 2827 } 2828 } 2829 2830 2831 void * 2832 ProcessGDBRemote::AsyncThread (void *arg) 2833 { 2834 ProcessGDBRemote *process = (ProcessGDBRemote*) arg; 2835 2836 LogSP log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet (GDBR_LOG_PROCESS)); 2837 if (log) 2838 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread starting...", __FUNCTION__, arg, process->GetID()); 2839 2840 Listener listener ("ProcessGDBRemote::AsyncThread"); 2841 EventSP event_sp; 2842 const uint32_t desired_event_mask = eBroadcastBitAsyncContinue | 2843 eBroadcastBitAsyncThreadShouldExit; 2844 2845 if (listener.StartListeningForEvents (&process->m_async_broadcaster, desired_event_mask) == desired_event_mask) 2846 { 2847 listener.StartListeningForEvents (&process->m_gdb_comm, Communication::eBroadcastBitReadThreadDidExit); 2848 2849 bool done = false; 2850 while (!done) 2851 { 2852 if (log) 2853 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__, arg, process->GetID()); 2854 if (listener.WaitForEvent (NULL, event_sp)) 2855 { 2856 const uint32_t event_type = event_sp->GetType(); 2857 if (event_sp->BroadcasterIs (&process->m_async_broadcaster)) 2858 { 2859 if (log) 2860 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") Got an event of type: %d...", __FUNCTION__, arg, process->GetID(), event_type); 2861 2862 switch (event_type) 2863 { 2864 case eBroadcastBitAsyncContinue: 2865 { 2866 const EventDataBytes *continue_packet = EventDataBytes::GetEventDataFromEvent(event_sp.get()); 2867 2868 if (continue_packet) 2869 { 2870 const char *continue_cstr = (const char *)continue_packet->GetBytes (); 2871 const size_t continue_cstr_len = continue_packet->GetByteSize (); 2872 if (log) 2873 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg, process->GetID(), continue_cstr); 2874 2875 if (::strstr (continue_cstr, "vAttach") == NULL) 2876 process->SetPrivateState(eStateRunning); 2877 StringExtractorGDBRemote response; 2878 StateType stop_state = process->GetGDBRemote().SendContinuePacketAndWaitForResponse (process, continue_cstr, continue_cstr_len, response); 2879 2880 // We need to immediately clear the thread ID list so we are sure to get a valid list of threads. 2881 // The thread ID list might be contained within the "response", or the stop reply packet that 2882 // caused the stop. So clear it now before we give the stop reply packet to the process 2883 // using the process->SetLastStopPacket()... 2884 process->ClearThreadIDList (); 2885 2886 switch (stop_state) 2887 { 2888 case eStateStopped: 2889 case eStateCrashed: 2890 case eStateSuspended: 2891 process->SetLastStopPacket (response); 2892 process->SetPrivateState (stop_state); 2893 break; 2894 2895 case eStateExited: 2896 process->SetLastStopPacket (response); 2897 process->ClearThreadIDList(); 2898 response.SetFilePos(1); 2899 process->SetExitStatus(response.GetHexU8(), NULL); 2900 done = true; 2901 break; 2902 2903 case eStateInvalid: 2904 process->SetExitStatus(-1, "lost connection"); 2905 break; 2906 2907 default: 2908 process->SetPrivateState (stop_state); 2909 break; 2910 } 2911 } 2912 } 2913 break; 2914 2915 case eBroadcastBitAsyncThreadShouldExit: 2916 if (log) 2917 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__, arg, process->GetID()); 2918 done = true; 2919 break; 2920 2921 default: 2922 if (log) 2923 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") got unknown event 0x%8.8x", __FUNCTION__, arg, process->GetID(), event_type); 2924 done = true; 2925 break; 2926 } 2927 } 2928 else if (event_sp->BroadcasterIs (&process->m_gdb_comm)) 2929 { 2930 if (event_type & Communication::eBroadcastBitReadThreadDidExit) 2931 { 2932 process->SetExitStatus (-1, "lost connection"); 2933 done = true; 2934 } 2935 } 2936 } 2937 else 2938 { 2939 if (log) 2940 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") listener.WaitForEvent (NULL, event_sp) => false", __FUNCTION__, arg, process->GetID()); 2941 done = true; 2942 } 2943 } 2944 } 2945 2946 if (log) 2947 log->Printf ("ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64 ") thread exiting...", __FUNCTION__, arg, process->GetID()); 2948 2949 process->m_async_thread = LLDB_INVALID_HOST_THREAD; 2950 return NULL; 2951 } 2952 2953 const char * 2954 ProcessGDBRemote::GetDispatchQueueNameForThread 2955 ( 2956 addr_t thread_dispatch_qaddr, 2957 std::string &dispatch_queue_name 2958 ) 2959 { 2960 dispatch_queue_name.clear(); 2961 if (thread_dispatch_qaddr != 0 && thread_dispatch_qaddr != LLDB_INVALID_ADDRESS) 2962 { 2963 // Cache the dispatch_queue_offsets_addr value so we don't always have 2964 // to look it up 2965 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2966 { 2967 static ConstString g_dispatch_queue_offsets_symbol_name ("dispatch_queue_offsets"); 2968 const Symbol *dispatch_queue_offsets_symbol = NULL; 2969 ModuleSpec libSystem_module_spec (FileSpec("libSystem.B.dylib", false)); 2970 ModuleSP module_sp(GetTarget().GetImages().FindFirstModule (libSystem_module_spec)); 2971 if (module_sp) 2972 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2973 2974 if (dispatch_queue_offsets_symbol == NULL) 2975 { 2976 ModuleSpec libdispatch_module_spec (FileSpec("libdispatch.dylib", false)); 2977 module_sp = GetTarget().GetImages().FindFirstModule (libdispatch_module_spec); 2978 if (module_sp) 2979 dispatch_queue_offsets_symbol = module_sp->FindFirstSymbolWithNameAndType (g_dispatch_queue_offsets_symbol_name, eSymbolTypeData); 2980 } 2981 if (dispatch_queue_offsets_symbol) 2982 m_dispatch_queue_offsets_addr = dispatch_queue_offsets_symbol->GetAddress().GetLoadAddress(&m_target); 2983 2984 if (m_dispatch_queue_offsets_addr == LLDB_INVALID_ADDRESS) 2985 return NULL; 2986 } 2987 2988 uint8_t memory_buffer[8]; 2989 DataExtractor data (memory_buffer, 2990 sizeof(memory_buffer), 2991 m_target.GetArchitecture().GetByteOrder(), 2992 m_target.GetArchitecture().GetAddressByteSize()); 2993 2994 // Excerpt from src/queue_private.h 2995 struct dispatch_queue_offsets_s 2996 { 2997 uint16_t dqo_version; 2998 uint16_t dqo_label; // in version 1-3, offset to string; in version 4+, offset to a pointer to a string 2999 uint16_t dqo_label_size; // in version 1-3, length of string; in version 4+, size of a (void*) in this process 3000 } dispatch_queue_offsets; 3001 3002 3003 Error error; 3004 if (ReadMemory (m_dispatch_queue_offsets_addr, memory_buffer, sizeof(dispatch_queue_offsets), error) == sizeof(dispatch_queue_offsets)) 3005 { 3006 uint32_t data_offset = 0; 3007 if (data.GetU16(&data_offset, &dispatch_queue_offsets.dqo_version, sizeof(dispatch_queue_offsets)/sizeof(uint16_t))) 3008 { 3009 if (ReadMemory (thread_dispatch_qaddr, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 3010 { 3011 data_offset = 0; 3012 lldb::addr_t queue_addr = data.GetAddress(&data_offset); 3013 if (dispatch_queue_offsets.dqo_version >= 4) 3014 { 3015 // libdispatch versions 4+, pointer to dispatch name is in the 3016 // queue structure. 3017 lldb::addr_t pointer_to_label_address = queue_addr + dispatch_queue_offsets.dqo_label; 3018 if (ReadMemory (pointer_to_label_address, &memory_buffer, data.GetAddressByteSize(), error) == data.GetAddressByteSize()) 3019 { 3020 data_offset = 0; 3021 lldb::addr_t label_addr = data.GetAddress(&data_offset); 3022 ReadCStringFromMemory (label_addr, dispatch_queue_name, error); 3023 } 3024 } 3025 else 3026 { 3027 // libdispatch versions 1-3, dispatch name is a fixed width char array 3028 // in the queue structure. 3029 lldb::addr_t label_addr = queue_addr + dispatch_queue_offsets.dqo_label; 3030 dispatch_queue_name.resize(dispatch_queue_offsets.dqo_label_size, '\0'); 3031 size_t bytes_read = ReadMemory (label_addr, &dispatch_queue_name[0], dispatch_queue_offsets.dqo_label_size, error); 3032 if (bytes_read < dispatch_queue_offsets.dqo_label_size) 3033 dispatch_queue_name.erase (bytes_read); 3034 } 3035 } 3036 } 3037 } 3038 } 3039 if (dispatch_queue_name.empty()) 3040 return NULL; 3041 return dispatch_queue_name.c_str(); 3042 } 3043 3044 //uint32_t 3045 //ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids) 3046 //{ 3047 // // If we are planning to launch the debugserver remotely, then we need to fire up a debugserver 3048 // // process and ask it for the list of processes. But if we are local, we can let the Host do it. 3049 // if (m_local_debugserver) 3050 // { 3051 // return Host::ListProcessesMatchingName (name, matches, pids); 3052 // } 3053 // else 3054 // { 3055 // // FIXME: Implement talking to the remote debugserver. 3056 // return 0; 3057 // } 3058 // 3059 //} 3060 // 3061 bool 3062 ProcessGDBRemote::NewThreadNotifyBreakpointHit (void *baton, 3063 lldb_private::StoppointCallbackContext *context, 3064 lldb::user_id_t break_id, 3065 lldb::user_id_t break_loc_id) 3066 { 3067 // I don't think I have to do anything here, just make sure I notice the new thread when it starts to 3068 // run so I can stop it if that's what I want to do. 3069 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3070 if (log) 3071 log->Printf("Hit New Thread Notification breakpoint."); 3072 return false; 3073 } 3074 3075 3076 bool 3077 ProcessGDBRemote::StartNoticingNewThreads() 3078 { 3079 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3080 if (m_thread_create_bp_sp) 3081 { 3082 if (log && log->GetVerbose()) 3083 log->Printf("Enabled noticing new thread breakpoint."); 3084 m_thread_create_bp_sp->SetEnabled(true); 3085 } 3086 else 3087 { 3088 PlatformSP platform_sp (m_target.GetPlatform()); 3089 if (platform_sp) 3090 { 3091 m_thread_create_bp_sp = platform_sp->SetThreadCreationBreakpoint(m_target); 3092 if (m_thread_create_bp_sp) 3093 { 3094 if (log && log->GetVerbose()) 3095 log->Printf("Successfully created new thread notification breakpoint %i", m_thread_create_bp_sp->GetID()); 3096 m_thread_create_bp_sp->SetCallback (ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true); 3097 } 3098 else 3099 { 3100 if (log) 3101 log->Printf("Failed to create new thread notification breakpoint."); 3102 } 3103 } 3104 } 3105 return m_thread_create_bp_sp.get() != NULL; 3106 } 3107 3108 bool 3109 ProcessGDBRemote::StopNoticingNewThreads() 3110 { 3111 LogSP log (lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 3112 if (log && log->GetVerbose()) 3113 log->Printf ("Disabling new thread notification breakpoint."); 3114 3115 if (m_thread_create_bp_sp) 3116 m_thread_create_bp_sp->SetEnabled(false); 3117 3118 return true; 3119 } 3120 3121 lldb_private::DynamicLoader * 3122 ProcessGDBRemote::GetDynamicLoader () 3123 { 3124 if (m_dyld_ap.get() == NULL) 3125 m_dyld_ap.reset (DynamicLoader::FindPlugin(this, m_dyld_plugin_name.empty() ? NULL : m_dyld_plugin_name.c_str())); 3126 return m_dyld_ap.get(); 3127 } 3128 3129 3130 class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed 3131 { 3132 private: 3133 3134 public: 3135 CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter) : 3136 CommandObjectParsed (interpreter, 3137 "process plugin packet history", 3138 "Dumps the packet history buffer. ", 3139 NULL) 3140 { 3141 } 3142 3143 ~CommandObjectProcessGDBRemotePacketHistory () 3144 { 3145 } 3146 3147 bool 3148 DoExecute (Args& command, CommandReturnObject &result) 3149 { 3150 const size_t argc = command.GetArgumentCount(); 3151 if (argc == 0) 3152 { 3153 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3154 if (process) 3155 { 3156 process->GetGDBRemote().DumpHistory(result.GetOutputStream()); 3157 result.SetStatus (eReturnStatusSuccessFinishResult); 3158 return true; 3159 } 3160 } 3161 else 3162 { 3163 result.AppendErrorWithFormat ("'%s' takes no arguments", m_cmd_name.c_str()); 3164 } 3165 result.SetStatus (eReturnStatusFailed); 3166 return false; 3167 } 3168 }; 3169 3170 class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed 3171 { 3172 private: 3173 3174 public: 3175 CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter) : 3176 CommandObjectParsed (interpreter, 3177 "process plugin packet send", 3178 "Send a custom packet through the GDB remote protocol and print the answer. " 3179 "The packet header and footer will automatically be added to the packet prior to sending and stripped from the result.", 3180 NULL) 3181 { 3182 } 3183 3184 ~CommandObjectProcessGDBRemotePacketSend () 3185 { 3186 } 3187 3188 bool 3189 DoExecute (Args& command, CommandReturnObject &result) 3190 { 3191 const size_t argc = command.GetArgumentCount(); 3192 if (argc == 0) 3193 { 3194 result.AppendErrorWithFormat ("'%s' takes a one or more packet content arguments", m_cmd_name.c_str()); 3195 result.SetStatus (eReturnStatusFailed); 3196 return false; 3197 } 3198 3199 ProcessGDBRemote *process = (ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr(); 3200 if (process) 3201 { 3202 for (size_t i=0; i<argc; ++ i) 3203 { 3204 const char *packet_cstr = command.GetArgumentAtIndex(0); 3205 bool send_async = true; 3206 StringExtractorGDBRemote response; 3207 process->GetGDBRemote().SendPacketAndWaitForResponse(packet_cstr, response, send_async); 3208 result.SetStatus (eReturnStatusSuccessFinishResult); 3209 Stream &output_strm = result.GetOutputStream(); 3210 output_strm.Printf (" packet: %s\n", packet_cstr); 3211 const std::string &response_str = response.GetStringRef(); 3212 if (response_str.empty()) 3213 output_strm.PutCString ("response: \nerror: UNIMPLEMENTED\n"); 3214 else 3215 output_strm.Printf ("response: %s\n", response.GetStringRef().c_str()); 3216 } 3217 } 3218 return true; 3219 } 3220 }; 3221 3222 class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword 3223 { 3224 private: 3225 3226 public: 3227 CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter) : 3228 CommandObjectMultiword (interpreter, 3229 "process plugin packet", 3230 "Commands that deal with GDB remote packets.", 3231 NULL) 3232 { 3233 LoadSubCommand ("history", CommandObjectSP (new CommandObjectProcessGDBRemotePacketHistory (interpreter))); 3234 LoadSubCommand ("send", CommandObjectSP (new CommandObjectProcessGDBRemotePacketSend (interpreter))); 3235 } 3236 3237 ~CommandObjectProcessGDBRemotePacket () 3238 { 3239 } 3240 }; 3241 3242 class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword 3243 { 3244 public: 3245 CommandObjectMultiwordProcessGDBRemote (CommandInterpreter &interpreter) : 3246 CommandObjectMultiword (interpreter, 3247 "process plugin", 3248 "A set of commands for operating on a ProcessGDBRemote process.", 3249 "process plugin <subcommand> [<subcommand-options>]") 3250 { 3251 LoadSubCommand ("packet", CommandObjectSP (new CommandObjectProcessGDBRemotePacket (interpreter))); 3252 } 3253 3254 ~CommandObjectMultiwordProcessGDBRemote () 3255 { 3256 } 3257 }; 3258 3259 CommandObject * 3260 ProcessGDBRemote::GetPluginCommandObject() 3261 { 3262 if (!m_command_sp) 3263 m_command_sp.reset (new CommandObjectMultiwordProcessGDBRemote (GetTarget().GetDebugger().GetCommandInterpreter())); 3264 return m_command_sp.get(); 3265 } 3266