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