1 //===-- GDBRemoteCommunicationServer.cpp ------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include <errno.h> 11 12 #include "lldb/Host/Config.h" 13 14 #include "GDBRemoteCommunicationServer.h" 15 #include "lldb/Core/StreamGDBRemote.h" 16 17 // C Includes 18 // C++ Includes 19 #include <cstring> 20 #include <chrono> 21 #include <thread> 22 23 // Other libraries and framework includes 24 #include "llvm/ADT/Triple.h" 25 #include "lldb/Interpreter/Args.h" 26 #include "lldb/Core/Debugger.h" 27 #include "lldb/Core/Log.h" 28 #include "lldb/Core/State.h" 29 #include "lldb/Core/StreamString.h" 30 #include "lldb/Host/ConnectionFileDescriptor.h" 31 #include "lldb/Host/Debug.h" 32 #include "lldb/Host/Endian.h" 33 #include "lldb/Host/File.h" 34 #include "lldb/Host/FileSystem.h" 35 #include "lldb/Host/Host.h" 36 #include "lldb/Host/HostInfo.h" 37 #include "lldb/Host/TimeValue.h" 38 #include "lldb/Target/FileAction.h" 39 #include "lldb/Target/Platform.h" 40 #include "lldb/Target/Process.h" 41 #include "lldb/Target/NativeRegisterContext.h" 42 #include "Host/common/NativeProcessProtocol.h" 43 #include "Host/common/NativeThreadProtocol.h" 44 45 // Project includes 46 #include "Utility/StringExtractorGDBRemote.h" 47 #include "ProcessGDBRemote.h" 48 #include "ProcessGDBRemoteLog.h" 49 50 using namespace lldb; 51 using namespace lldb_private; 52 53 //---------------------------------------------------------------------- 54 // GDBRemote Errors 55 //---------------------------------------------------------------------- 56 57 namespace 58 { 59 enum GDBRemoteServerError 60 { 61 // Set to the first unused error number in literal form below 62 eErrorFirst = 29, 63 eErrorNoProcess = eErrorFirst, 64 eErrorResume, 65 eErrorExitStatus 66 }; 67 } 68 69 //---------------------------------------------------------------------- 70 // GDBRemoteCommunicationServer constructor 71 //---------------------------------------------------------------------- 72 GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform) : 73 GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), 74 m_platform_sp (Platform::GetHostPlatform ()), 75 m_async_thread (LLDB_INVALID_HOST_THREAD), 76 m_process_launch_info (), 77 m_process_launch_error (), 78 m_spawned_pids (), 79 m_spawned_pids_mutex (Mutex::eMutexTypeRecursive), 80 m_proc_infos (), 81 m_proc_infos_index (0), 82 m_port_map (), 83 m_port_offset(0), 84 m_current_tid (LLDB_INVALID_THREAD_ID), 85 m_continue_tid (LLDB_INVALID_THREAD_ID), 86 m_debugged_process_mutex (Mutex::eMutexTypeRecursive), 87 m_debugged_process_sp (), 88 m_debugger_sp (), 89 m_stdio_communication ("process.stdio"), 90 m_exit_now (false), 91 m_inferior_prev_state (StateType::eStateInvalid), 92 m_thread_suffix_supported (false), 93 m_list_threads_in_stop_reply (false), 94 m_active_auxv_buffer_sp (), 95 m_saved_registers_mutex (), 96 m_saved_registers_map (), 97 m_next_saved_registers_id (1) 98 { 99 assert(is_platform && "must be lldb-platform if debugger is not specified"); 100 } 101 102 GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform, 103 const lldb::PlatformSP& platform_sp, 104 lldb::DebuggerSP &debugger_sp) : 105 GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), 106 m_platform_sp (platform_sp), 107 m_async_thread (LLDB_INVALID_HOST_THREAD), 108 m_process_launch_info (), 109 m_process_launch_error (), 110 m_spawned_pids (), 111 m_spawned_pids_mutex (Mutex::eMutexTypeRecursive), 112 m_proc_infos (), 113 m_proc_infos_index (0), 114 m_port_map (), 115 m_port_offset(0), 116 m_current_tid (LLDB_INVALID_THREAD_ID), 117 m_continue_tid (LLDB_INVALID_THREAD_ID), 118 m_debugged_process_mutex (Mutex::eMutexTypeRecursive), 119 m_debugged_process_sp (), 120 m_debugger_sp (debugger_sp), 121 m_stdio_communication ("process.stdio"), 122 m_exit_now (false), 123 m_inferior_prev_state (StateType::eStateInvalid), 124 m_thread_suffix_supported (false), 125 m_list_threads_in_stop_reply (false), 126 m_active_auxv_buffer_sp (), 127 m_saved_registers_mutex (), 128 m_saved_registers_map (), 129 m_next_saved_registers_id (1) 130 { 131 assert(platform_sp); 132 assert((is_platform || debugger_sp) && "must specify non-NULL debugger_sp when lldb-gdbserver"); 133 } 134 135 //---------------------------------------------------------------------- 136 // Destructor 137 //---------------------------------------------------------------------- 138 GDBRemoteCommunicationServer::~GDBRemoteCommunicationServer() 139 { 140 } 141 142 GDBRemoteCommunication::PacketResult 143 GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, 144 Error &error, 145 bool &interrupt, 146 bool &quit) 147 { 148 StringExtractorGDBRemote packet; 149 150 PacketResult packet_result = WaitForPacketWithTimeoutMicroSecondsNoLock (packet, timeout_usec); 151 if (packet_result == PacketResult::Success) 152 { 153 const StringExtractorGDBRemote::ServerPacketType packet_type = packet.GetServerPacketType (); 154 switch (packet_type) 155 { 156 case StringExtractorGDBRemote::eServerPacketType_nack: 157 case StringExtractorGDBRemote::eServerPacketType_ack: 158 break; 159 160 case StringExtractorGDBRemote::eServerPacketType_invalid: 161 error.SetErrorString("invalid packet"); 162 quit = true; 163 break; 164 165 default: 166 case StringExtractorGDBRemote::eServerPacketType_unimplemented: 167 packet_result = SendUnimplementedResponse (packet.GetStringRef().c_str()); 168 break; 169 170 case StringExtractorGDBRemote::eServerPacketType_A: 171 packet_result = Handle_A (packet); 172 break; 173 174 case StringExtractorGDBRemote::eServerPacketType_qfProcessInfo: 175 packet_result = Handle_qfProcessInfo (packet); 176 break; 177 178 case StringExtractorGDBRemote::eServerPacketType_qsProcessInfo: 179 packet_result = Handle_qsProcessInfo (packet); 180 break; 181 182 case StringExtractorGDBRemote::eServerPacketType_qC: 183 packet_result = Handle_qC (packet); 184 break; 185 186 case StringExtractorGDBRemote::eServerPacketType_qHostInfo: 187 packet_result = Handle_qHostInfo (packet); 188 break; 189 190 case StringExtractorGDBRemote::eServerPacketType_qLaunchGDBServer: 191 packet_result = Handle_qLaunchGDBServer (packet); 192 break; 193 194 case StringExtractorGDBRemote::eServerPacketType_qKillSpawnedProcess: 195 packet_result = Handle_qKillSpawnedProcess (packet); 196 break; 197 198 case StringExtractorGDBRemote::eServerPacketType_k: 199 packet_result = Handle_k (packet); 200 quit = true; 201 break; 202 203 case StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess: 204 packet_result = Handle_qLaunchSuccess (packet); 205 break; 206 207 case StringExtractorGDBRemote::eServerPacketType_qGroupName: 208 packet_result = Handle_qGroupName (packet); 209 break; 210 211 case StringExtractorGDBRemote::eServerPacketType_qProcessInfo: 212 packet_result = Handle_qProcessInfo (packet); 213 break; 214 215 case StringExtractorGDBRemote::eServerPacketType_qProcessInfoPID: 216 packet_result = Handle_qProcessInfoPID (packet); 217 break; 218 219 case StringExtractorGDBRemote::eServerPacketType_qSpeedTest: 220 packet_result = Handle_qSpeedTest (packet); 221 break; 222 223 case StringExtractorGDBRemote::eServerPacketType_qUserName: 224 packet_result = Handle_qUserName (packet); 225 break; 226 227 case StringExtractorGDBRemote::eServerPacketType_qGetWorkingDir: 228 packet_result = Handle_qGetWorkingDir(packet); 229 break; 230 231 case StringExtractorGDBRemote::eServerPacketType_QEnvironment: 232 packet_result = Handle_QEnvironment (packet); 233 break; 234 235 case StringExtractorGDBRemote::eServerPacketType_QLaunchArch: 236 packet_result = Handle_QLaunchArch (packet); 237 break; 238 239 case StringExtractorGDBRemote::eServerPacketType_QSetDisableASLR: 240 packet_result = Handle_QSetDisableASLR (packet); 241 break; 242 243 case StringExtractorGDBRemote::eServerPacketType_QSetDetachOnError: 244 packet_result = Handle_QSetDetachOnError (packet); 245 break; 246 247 case StringExtractorGDBRemote::eServerPacketType_QSetSTDIN: 248 packet_result = Handle_QSetSTDIN (packet); 249 break; 250 251 case StringExtractorGDBRemote::eServerPacketType_QSetSTDOUT: 252 packet_result = Handle_QSetSTDOUT (packet); 253 break; 254 255 case StringExtractorGDBRemote::eServerPacketType_QSetSTDERR: 256 packet_result = Handle_QSetSTDERR (packet); 257 break; 258 259 case StringExtractorGDBRemote::eServerPacketType_QSetWorkingDir: 260 packet_result = Handle_QSetWorkingDir (packet); 261 break; 262 263 case StringExtractorGDBRemote::eServerPacketType_QStartNoAckMode: 264 packet_result = Handle_QStartNoAckMode (packet); 265 break; 266 267 case StringExtractorGDBRemote::eServerPacketType_qPlatform_mkdir: 268 packet_result = Handle_qPlatform_mkdir (packet); 269 break; 270 271 case StringExtractorGDBRemote::eServerPacketType_qPlatform_chmod: 272 packet_result = Handle_qPlatform_chmod (packet); 273 break; 274 275 case StringExtractorGDBRemote::eServerPacketType_qPlatform_shell: 276 packet_result = Handle_qPlatform_shell (packet); 277 break; 278 279 case StringExtractorGDBRemote::eServerPacketType_C: 280 packet_result = Handle_C (packet); 281 break; 282 283 case StringExtractorGDBRemote::eServerPacketType_c: 284 packet_result = Handle_c (packet); 285 break; 286 287 case StringExtractorGDBRemote::eServerPacketType_vCont: 288 packet_result = Handle_vCont (packet); 289 break; 290 291 case StringExtractorGDBRemote::eServerPacketType_vCont_actions: 292 packet_result = Handle_vCont_actions (packet); 293 break; 294 295 case StringExtractorGDBRemote::eServerPacketType_stop_reason: // ? 296 packet_result = Handle_stop_reason (packet); 297 break; 298 299 case StringExtractorGDBRemote::eServerPacketType_vFile_open: 300 packet_result = Handle_vFile_Open (packet); 301 break; 302 303 case StringExtractorGDBRemote::eServerPacketType_vFile_close: 304 packet_result = Handle_vFile_Close (packet); 305 break; 306 307 case StringExtractorGDBRemote::eServerPacketType_vFile_pread: 308 packet_result = Handle_vFile_pRead (packet); 309 break; 310 311 case StringExtractorGDBRemote::eServerPacketType_vFile_pwrite: 312 packet_result = Handle_vFile_pWrite (packet); 313 break; 314 315 case StringExtractorGDBRemote::eServerPacketType_vFile_size: 316 packet_result = Handle_vFile_Size (packet); 317 break; 318 319 case StringExtractorGDBRemote::eServerPacketType_vFile_mode: 320 packet_result = Handle_vFile_Mode (packet); 321 break; 322 323 case StringExtractorGDBRemote::eServerPacketType_vFile_exists: 324 packet_result = Handle_vFile_Exists (packet); 325 break; 326 327 case StringExtractorGDBRemote::eServerPacketType_vFile_stat: 328 packet_result = Handle_vFile_Stat (packet); 329 break; 330 331 case StringExtractorGDBRemote::eServerPacketType_vFile_md5: 332 packet_result = Handle_vFile_MD5 (packet); 333 break; 334 335 case StringExtractorGDBRemote::eServerPacketType_vFile_symlink: 336 packet_result = Handle_vFile_symlink (packet); 337 break; 338 339 case StringExtractorGDBRemote::eServerPacketType_vFile_unlink: 340 packet_result = Handle_vFile_unlink (packet); 341 break; 342 343 case StringExtractorGDBRemote::eServerPacketType_qRegisterInfo: 344 packet_result = Handle_qRegisterInfo (packet); 345 break; 346 347 case StringExtractorGDBRemote::eServerPacketType_qfThreadInfo: 348 packet_result = Handle_qfThreadInfo (packet); 349 break; 350 351 case StringExtractorGDBRemote::eServerPacketType_qsThreadInfo: 352 packet_result = Handle_qsThreadInfo (packet); 353 break; 354 355 case StringExtractorGDBRemote::eServerPacketType_p: 356 packet_result = Handle_p (packet); 357 break; 358 359 case StringExtractorGDBRemote::eServerPacketType_P: 360 packet_result = Handle_P (packet); 361 break; 362 363 case StringExtractorGDBRemote::eServerPacketType_H: 364 packet_result = Handle_H (packet); 365 break; 366 367 case StringExtractorGDBRemote::eServerPacketType_m: 368 packet_result = Handle_m (packet); 369 break; 370 371 case StringExtractorGDBRemote::eServerPacketType_M: 372 packet_result = Handle_M (packet); 373 break; 374 375 case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfoSupported: 376 packet_result = Handle_qMemoryRegionInfoSupported (packet); 377 break; 378 379 case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfo: 380 packet_result = Handle_qMemoryRegionInfo (packet); 381 break; 382 383 case StringExtractorGDBRemote::eServerPacketType_interrupt: 384 if (IsGdbServer ()) 385 packet_result = Handle_interrupt (packet); 386 else 387 { 388 error.SetErrorString("interrupt received"); 389 interrupt = true; 390 } 391 break; 392 393 case StringExtractorGDBRemote::eServerPacketType_Z: 394 packet_result = Handle_Z (packet); 395 break; 396 397 case StringExtractorGDBRemote::eServerPacketType_z: 398 packet_result = Handle_z (packet); 399 break; 400 401 case StringExtractorGDBRemote::eServerPacketType_s: 402 packet_result = Handle_s (packet); 403 break; 404 405 case StringExtractorGDBRemote::eServerPacketType_qSupported: 406 packet_result = Handle_qSupported (packet); 407 break; 408 409 case StringExtractorGDBRemote::eServerPacketType_QThreadSuffixSupported: 410 packet_result = Handle_QThreadSuffixSupported (packet); 411 break; 412 413 case StringExtractorGDBRemote::eServerPacketType_QListThreadsInStopReply: 414 packet_result = Handle_QListThreadsInStopReply (packet); 415 break; 416 417 case StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read: 418 packet_result = Handle_qXfer_auxv_read (packet); 419 break; 420 421 case StringExtractorGDBRemote::eServerPacketType_QSaveRegisterState: 422 packet_result = Handle_QSaveRegisterState (packet); 423 break; 424 425 case StringExtractorGDBRemote::eServerPacketType_QRestoreRegisterState: 426 packet_result = Handle_QRestoreRegisterState (packet); 427 break; 428 429 case StringExtractorGDBRemote::eServerPacketType_vAttach: 430 packet_result = Handle_vAttach (packet); 431 break; 432 433 case StringExtractorGDBRemote::eServerPacketType_qThreadStopInfo: 434 packet_result = Handle_qThreadStopInfo (packet); 435 break; 436 } 437 } 438 else 439 { 440 if (!IsConnected()) 441 { 442 error.SetErrorString("lost connection"); 443 quit = true; 444 } 445 else 446 { 447 error.SetErrorString("timeout"); 448 } 449 } 450 451 // Check if anything occurred that would force us to want to exit. 452 if (m_exit_now) 453 quit = true; 454 455 return packet_result; 456 } 457 458 lldb_private::Error 459 GDBRemoteCommunicationServer::SetLaunchArguments (const char *const args[], int argc) 460 { 461 if ((argc < 1) || !args || !args[0] || !args[0][0]) 462 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 463 464 m_process_launch_info.SetArguments (const_cast<const char**> (args), true); 465 return lldb_private::Error (); 466 } 467 468 lldb_private::Error 469 GDBRemoteCommunicationServer::SetLaunchFlags (unsigned int launch_flags) 470 { 471 m_process_launch_info.GetFlags ().Set (launch_flags); 472 return lldb_private::Error (); 473 } 474 475 lldb_private::Error 476 GDBRemoteCommunicationServer::LaunchProcess () 477 { 478 // FIXME This looks an awful lot like we could override this in 479 // derived classes, one for lldb-platform, the other for lldb-gdbserver. 480 if (IsGdbServer ()) 481 return LaunchProcessForDebugging (); 482 else 483 return LaunchPlatformProcess (); 484 } 485 486 bool 487 GDBRemoteCommunicationServer::ShouldRedirectInferiorOutputOverGdbRemote (const lldb_private::ProcessLaunchInfo &launch_info) const 488 { 489 // Retrieve the file actions specified for stdout and stderr. 490 auto stdout_file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 491 auto stderr_file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 492 493 // If neither stdout and stderr file actions are specified, we're not doing anything special, so 494 // assume we want to redirect stdout/stderr over gdb-remote $O messages. 495 if ((stdout_file_action == nullptr) && (stderr_file_action == nullptr)) 496 { 497 // Send stdout/stderr over the gdb-remote protocol. 498 return true; 499 } 500 501 // Any other setting for either stdout or stderr implies we are either suppressing 502 // it (with /dev/null) or we've got it set to a PTY. Either way, we don't want the 503 // output over gdb-remote. 504 return false; 505 } 506 507 lldb_private::Error 508 GDBRemoteCommunicationServer::LaunchProcessForDebugging () 509 { 510 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 511 512 if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) 513 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 514 515 lldb_private::Error error; 516 { 517 Mutex::Locker locker (m_debugged_process_mutex); 518 assert (!m_debugged_process_sp && "lldb-gdbserver creating debugged process but one already exists"); 519 error = m_platform_sp->LaunchNativeProcess ( 520 m_process_launch_info, 521 *this, 522 m_debugged_process_sp); 523 } 524 525 if (!error.Success ()) 526 { 527 fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); 528 return error; 529 } 530 531 // Handle mirroring of inferior stdout/stderr over the gdb-remote protocol as needed. 532 // llgs local-process debugging may specify PTYs, which will eliminate the need to reflect inferior 533 // stdout/stderr over the gdb-remote protocol. 534 if (ShouldRedirectInferiorOutputOverGdbRemote (m_process_launch_info)) 535 { 536 if (log) 537 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " setting up stdout/stderr redirection via $O gdb-remote commands", __FUNCTION__, m_debugged_process_sp->GetID ()); 538 539 // Setup stdout/stderr mapping from inferior to $O 540 auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); 541 if (terminal_fd >= 0) 542 { 543 if (log) 544 log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); 545 error = SetSTDIOFileDescriptor (terminal_fd); 546 if (error.Fail ()) 547 return error; 548 } 549 else 550 { 551 if (log) 552 log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); 553 } 554 } 555 else 556 { 557 if (log) 558 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " skipping stdout/stderr redirection via $O: inferior will communicate over client-provided file descriptors", __FUNCTION__, m_debugged_process_sp->GetID ()); 559 } 560 561 printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID ()); 562 563 // Add to list of spawned processes. 564 lldb::pid_t pid; 565 if ((pid = m_process_launch_info.GetProcessID ()) != LLDB_INVALID_PROCESS_ID) 566 { 567 // add to spawned pids 568 Mutex::Locker locker (m_spawned_pids_mutex); 569 // On an lldb-gdbserver, we would expect there to be only one. 570 assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); 571 m_spawned_pids.insert (pid); 572 } 573 574 return error; 575 } 576 577 lldb_private::Error 578 GDBRemoteCommunicationServer::LaunchPlatformProcess () 579 { 580 if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) 581 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 582 583 // specify the process monitor if not already set. This should 584 // generally be what happens since we need to reap started 585 // processes. 586 if (!m_process_launch_info.GetMonitorProcessCallback ()) 587 m_process_launch_info.SetMonitorProcessCallback(ReapDebuggedProcess, this, false); 588 589 lldb_private::Error error = m_platform_sp->LaunchProcess (m_process_launch_info); 590 if (!error.Success ()) 591 { 592 fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); 593 return error; 594 } 595 596 printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID()); 597 598 // add to list of spawned processes. On an lldb-gdbserver, we 599 // would expect there to be only one. 600 lldb::pid_t pid; 601 if ( (pid = m_process_launch_info.GetProcessID()) != LLDB_INVALID_PROCESS_ID ) 602 { 603 // add to spawned pids 604 { 605 Mutex::Locker locker (m_spawned_pids_mutex); 606 m_spawned_pids.insert(pid); 607 } 608 } 609 610 return error; 611 } 612 613 lldb_private::Error 614 GDBRemoteCommunicationServer::AttachToProcess (lldb::pid_t pid) 615 { 616 Error error; 617 618 if (!IsGdbServer ()) 619 { 620 error.SetErrorString("cannot AttachToProcess () unless process is lldb-gdbserver"); 621 return error; 622 } 623 624 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 625 if (log) 626 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64, __FUNCTION__, pid); 627 628 // Scope for mutex locker. 629 { 630 // Before we try to attach, make sure we aren't already monitoring something else. 631 Mutex::Locker locker (m_spawned_pids_mutex); 632 if (!m_spawned_pids.empty ()) 633 { 634 error.SetErrorStringWithFormat ("cannot attach to a process %" PRIu64 " when another process with pid %" PRIu64 " is being debugged.", pid, *m_spawned_pids.begin()); 635 return error; 636 } 637 638 // Try to attach. 639 error = m_platform_sp->AttachNativeProcess (pid, *this, m_debugged_process_sp); 640 if (!error.Success ()) 641 { 642 fprintf (stderr, "%s: failed to attach to process %" PRIu64 ": %s", __FUNCTION__, pid, error.AsCString ()); 643 return error; 644 } 645 646 // Setup stdout/stderr mapping from inferior. 647 auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); 648 if (terminal_fd >= 0) 649 { 650 if (log) 651 log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); 652 error = SetSTDIOFileDescriptor (terminal_fd); 653 if (error.Fail ()) 654 return error; 655 } 656 else 657 { 658 if (log) 659 log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); 660 } 661 662 printf ("Attached to process %" PRIu64 "...\n", pid); 663 664 // Add to list of spawned processes. 665 assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); 666 m_spawned_pids.insert (pid); 667 668 return error; 669 } 670 } 671 672 void 673 GDBRemoteCommunicationServer::InitializeDelegate (lldb_private::NativeProcessProtocol *process) 674 { 675 assert (process && "process cannot be NULL"); 676 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 677 if (log) 678 { 679 log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", current state: %s", 680 __FUNCTION__, 681 process->GetID (), 682 StateAsCString (process->GetState ())); 683 } 684 } 685 686 GDBRemoteCommunication::PacketResult 687 GDBRemoteCommunicationServer::SendWResponse (lldb_private::NativeProcessProtocol *process) 688 { 689 assert (process && "process cannot be NULL"); 690 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 691 692 // send W notification 693 ExitType exit_type = ExitType::eExitTypeInvalid; 694 int return_code = 0; 695 std::string exit_description; 696 697 const bool got_exit_info = process->GetExitStatus (&exit_type, &return_code, exit_description); 698 if (!got_exit_info) 699 { 700 if (log) 701 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", failed to retrieve process exit status", __FUNCTION__, process->GetID ()); 702 703 StreamGDBRemote response; 704 response.PutChar ('E'); 705 response.PutHex8 (GDBRemoteServerError::eErrorExitStatus); 706 return SendPacketNoLock(response.GetData(), response.GetSize()); 707 } 708 else 709 { 710 if (log) 711 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", returning exit type %d, return code %d [%s]", __FUNCTION__, process->GetID (), exit_type, return_code, exit_description.c_str ()); 712 713 StreamGDBRemote response; 714 715 char return_type_code; 716 switch (exit_type) 717 { 718 case ExitType::eExitTypeExit: 719 return_type_code = 'W'; 720 break; 721 case ExitType::eExitTypeSignal: 722 return_type_code = 'X'; 723 break; 724 case ExitType::eExitTypeStop: 725 return_type_code = 'S'; 726 break; 727 case ExitType::eExitTypeInvalid: 728 return_type_code = 'E'; 729 break; 730 } 731 response.PutChar (return_type_code); 732 733 // POSIX exit status limited to unsigned 8 bits. 734 response.PutHex8 (return_code); 735 736 return SendPacketNoLock(response.GetData(), response.GetSize()); 737 } 738 } 739 740 static void 741 AppendHexValue (StreamString &response, const uint8_t* buf, uint32_t buf_size, bool swap) 742 { 743 int64_t i; 744 if (swap) 745 { 746 for (i = buf_size-1; i >= 0; i--) 747 response.PutHex8 (buf[i]); 748 } 749 else 750 { 751 for (i = 0; i < buf_size; i++) 752 response.PutHex8 (buf[i]); 753 } 754 } 755 756 static void 757 WriteRegisterValueInHexFixedWidth (StreamString &response, 758 NativeRegisterContextSP ®_ctx_sp, 759 const RegisterInfo ®_info, 760 const RegisterValue *reg_value_p) 761 { 762 RegisterValue reg_value; 763 if (!reg_value_p) 764 { 765 Error error = reg_ctx_sp->ReadRegister (®_info, reg_value); 766 if (error.Success ()) 767 reg_value_p = ®_value; 768 // else log. 769 } 770 771 if (reg_value_p) 772 { 773 AppendHexValue (response, (const uint8_t*) reg_value_p->GetBytes (), reg_value_p->GetByteSize (), false); 774 } 775 else 776 { 777 // Zero-out any unreadable values. 778 if (reg_info.byte_size > 0) 779 { 780 std::basic_string<uint8_t> zeros(reg_info.byte_size, '\0'); 781 AppendHexValue (response, zeros.data(), zeros.size(), false); 782 } 783 } 784 } 785 786 // WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); 787 788 789 static void 790 WriteGdbRegnumWithFixedWidthHexRegisterValue (StreamString &response, 791 NativeRegisterContextSP ®_ctx_sp, 792 const RegisterInfo ®_info, 793 const RegisterValue ®_value) 794 { 795 // Output the register number as 'NN:VVVVVVVV;' where NN is a 2 bytes HEX 796 // gdb register number, and VVVVVVVV is the correct number of hex bytes 797 // as ASCII for the register value. 798 if (reg_info.kinds[eRegisterKindGDB] == LLDB_INVALID_REGNUM) 799 return; 800 801 response.Printf ("%.02x:", reg_info.kinds[eRegisterKindGDB]); 802 WriteRegisterValueInHexFixedWidth (response, reg_ctx_sp, reg_info, ®_value); 803 response.PutChar (';'); 804 } 805 806 807 GDBRemoteCommunication::PacketResult 808 GDBRemoteCommunicationServer::SendStopReplyPacketForThread (lldb::tid_t tid) 809 { 810 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 811 812 // Ensure we're llgs. 813 if (!IsGdbServer ()) 814 { 815 // Only supported on llgs 816 return SendUnimplementedResponse (""); 817 } 818 819 // Ensure we have a debugged process. 820 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 821 return SendErrorResponse (50); 822 823 if (log) 824 log->Printf ("GDBRemoteCommunicationServer::%s preparing packet for pid %" PRIu64 " tid %" PRIu64, 825 __FUNCTION__, m_debugged_process_sp->GetID (), tid); 826 827 // Ensure we can get info on the given thread. 828 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); 829 if (!thread_sp) 830 return SendErrorResponse (51); 831 832 // Grab the reason this thread stopped. 833 struct ThreadStopInfo tid_stop_info; 834 if (!thread_sp->GetStopReason (tid_stop_info)) 835 return SendErrorResponse (52); 836 837 const bool did_exec = tid_stop_info.reason == eStopReasonExec; 838 // FIXME implement register handling for exec'd inferiors. 839 // if (did_exec) 840 // { 841 // const bool force = true; 842 // InitializeRegisters(force); 843 // } 844 845 StreamString response; 846 // Output the T packet with the thread 847 response.PutChar ('T'); 848 int signum = tid_stop_info.details.signal.signo; 849 if (log) 850 { 851 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64, 852 __FUNCTION__, 853 m_debugged_process_sp->GetID (), 854 tid, 855 signum, 856 tid_stop_info.reason, 857 tid_stop_info.details.exception.type); 858 } 859 860 switch (tid_stop_info.reason) 861 { 862 case eStopReasonSignal: 863 case eStopReasonException: 864 signum = thread_sp->TranslateStopInfoToGdbSignal (tid_stop_info); 865 break; 866 default: 867 signum = 0; 868 if (log) 869 { 870 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " has stop reason %d, using signo = 0 in stop reply response", 871 __FUNCTION__, 872 m_debugged_process_sp->GetID (), 873 tid, 874 tid_stop_info.reason); 875 } 876 break; 877 } 878 879 // Print the signal number. 880 response.PutHex8 (signum & 0xff); 881 882 // Include the tid. 883 response.Printf ("thread:%" PRIx64 ";", tid); 884 885 // Include the thread name if there is one. 886 const std::string thread_name = thread_sp->GetName (); 887 if (!thread_name.empty ()) 888 { 889 size_t thread_name_len = thread_name.length (); 890 891 if (::strcspn (thread_name.c_str (), "$#+-;:") == thread_name_len) 892 { 893 response.PutCString ("name:"); 894 response.PutCString (thread_name.c_str ()); 895 } 896 else 897 { 898 // The thread name contains special chars, send as hex bytes. 899 response.PutCString ("hexname:"); 900 response.PutCStringAsRawHex8 (thread_name.c_str ()); 901 } 902 response.PutChar (';'); 903 } 904 905 // FIXME look for analog 906 // thread_identifier_info_data_t thread_ident_info; 907 // if (DNBThreadGetIdentifierInfo (pid, tid, &thread_ident_info)) 908 // { 909 // if (thread_ident_info.dispatch_qaddr != 0) 910 // ostrm << std::hex << "qaddr:" << thread_ident_info.dispatch_qaddr << ';'; 911 // } 912 913 // If a 'QListThreadsInStopReply' was sent to enable this feature, we 914 // will send all thread IDs back in the "threads" key whose value is 915 // a list of hex thread IDs separated by commas: 916 // "threads:10a,10b,10c;" 917 // This will save the debugger from having to send a pair of qfThreadInfo 918 // and qsThreadInfo packets, but it also might take a lot of room in the 919 // stop reply packet, so it must be enabled only on systems where there 920 // are no limits on packet lengths. 921 if (m_list_threads_in_stop_reply) 922 { 923 response.PutCString ("threads:"); 924 925 uint32_t thread_index = 0; 926 NativeThreadProtocolSP listed_thread_sp; 927 for (listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); listed_thread_sp; ++thread_index, listed_thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index)) 928 { 929 if (thread_index > 0) 930 response.PutChar (','); 931 response.Printf ("%" PRIx64, listed_thread_sp->GetID ()); 932 } 933 response.PutChar (';'); 934 } 935 936 // 937 // Expedite registers. 938 // 939 940 // Grab the register context. 941 NativeRegisterContextSP reg_ctx_sp = thread_sp->GetRegisterContext (); 942 if (reg_ctx_sp) 943 { 944 // Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers. 945 const RegisterSet *reg_set_p; 946 if (reg_ctx_sp->GetRegisterSetCount () > 0 && ((reg_set_p = reg_ctx_sp->GetRegisterSet (0)) != nullptr)) 947 { 948 if (log) 949 log->Printf ("GDBRemoteCommunicationServer::%s expediting registers from set '%s' (registers set count: %zu)", __FUNCTION__, reg_set_p->name ? reg_set_p->name : "<unnamed-set>", reg_set_p->num_registers); 950 951 for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p) 952 { 953 const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex (*reg_num_p); 954 if (reg_info_p == nullptr) 955 { 956 if (log) 957 log->Printf ("GDBRemoteCommunicationServer::%s failed to get register info for register set '%s', register index %" PRIu32, __FUNCTION__, reg_set_p->name ? reg_set_p->name : "<unnamed-set>", *reg_num_p); 958 } 959 else if (reg_info_p->value_regs == nullptr) 960 { 961 // Only expediate registers that are not contained in other registers. 962 RegisterValue reg_value; 963 Error error = reg_ctx_sp->ReadRegister (reg_info_p, reg_value); 964 if (error.Success ()) 965 WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); 966 else 967 { 968 if (log) 969 log->Printf ("GDBRemoteCommunicationServer::%s failed to read register '%s' index %" PRIu32 ": %s", __FUNCTION__, reg_info_p->name ? reg_info_p->name : "<unnamed-register>", *reg_num_p, error.AsCString ()); 970 971 } 972 } 973 } 974 } 975 } 976 977 if (did_exec) 978 { 979 response.PutCString ("reason:exec;"); 980 } 981 else if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type) 982 { 983 response.PutCString ("metype:"); 984 response.PutHex64 (tid_stop_info.details.exception.type); 985 response.PutCString (";mecount:"); 986 response.PutHex32 (tid_stop_info.details.exception.data_count); 987 response.PutChar (';'); 988 989 for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i) 990 { 991 response.PutCString ("medata:"); 992 response.PutHex64 (tid_stop_info.details.exception.data[i]); 993 response.PutChar (';'); 994 } 995 } 996 997 return SendPacketNoLock (response.GetData(), response.GetSize()); 998 } 999 1000 void 1001 GDBRemoteCommunicationServer::HandleInferiorState_Exited (lldb_private::NativeProcessProtocol *process) 1002 { 1003 assert (process && "process cannot be NULL"); 1004 1005 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1006 if (log) 1007 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 1008 1009 // Send the exit result, and don't flush output. 1010 // Note: flushing output here would join the inferior stdio reflection thread, which 1011 // would gunk up the waitpid monitor thread that is calling this. 1012 PacketResult result = SendStopReasonForState (StateType::eStateExited, false); 1013 if (result != PacketResult::Success) 1014 { 1015 if (log) 1016 log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); 1017 } 1018 1019 // Remove the process from the list of spawned pids. 1020 { 1021 Mutex::Locker locker (m_spawned_pids_mutex); 1022 if (m_spawned_pids.erase (process->GetID ()) < 1) 1023 { 1024 if (log) 1025 log->Printf ("GDBRemoteCommunicationServer::%s failed to remove PID %" PRIu64 " from the spawned pids list", __FUNCTION__, process->GetID ()); 1026 1027 } 1028 } 1029 1030 // FIXME can't do this yet - since process state propagation is currently 1031 // synchronous, it is running off the NativeProcessProtocol's innards and 1032 // will tear down the NPP while it still has code to execute. 1033 #if 0 1034 // Clear the NativeProcessProtocol pointer. 1035 { 1036 Mutex::Locker locker (m_debugged_process_mutex); 1037 m_debugged_process_sp.reset(); 1038 } 1039 #endif 1040 1041 // Close the pipe to the inferior terminal i/o if we launched it 1042 // and set one up. Otherwise, 'k' and its flush of stdio could 1043 // end up waiting on a thread join that will never end. Consider 1044 // adding a timeout to the connection thread join call so we 1045 // can avoid that scenario altogether. 1046 MaybeCloseInferiorTerminalConnection (); 1047 1048 // We are ready to exit the debug monitor. 1049 m_exit_now = true; 1050 } 1051 1052 void 1053 GDBRemoteCommunicationServer::HandleInferiorState_Stopped (lldb_private::NativeProcessProtocol *process) 1054 { 1055 assert (process && "process cannot be NULL"); 1056 1057 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1058 if (log) 1059 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 1060 1061 // Send the stop reason unless this is the stop after the 1062 // launch or attach. 1063 switch (m_inferior_prev_state) 1064 { 1065 case eStateLaunching: 1066 case eStateAttaching: 1067 // Don't send anything per debugserver behavior. 1068 break; 1069 default: 1070 // In all other cases, send the stop reason. 1071 PacketResult result = SendStopReasonForState (StateType::eStateStopped, false); 1072 if (result != PacketResult::Success) 1073 { 1074 if (log) 1075 log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); 1076 } 1077 break; 1078 } 1079 } 1080 1081 void 1082 GDBRemoteCommunicationServer::ProcessStateChanged (lldb_private::NativeProcessProtocol *process, lldb::StateType state) 1083 { 1084 assert (process && "process cannot be NULL"); 1085 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1086 if (log) 1087 { 1088 log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", state: %s", 1089 __FUNCTION__, 1090 process->GetID (), 1091 StateAsCString (state)); 1092 } 1093 1094 switch (state) 1095 { 1096 case StateType::eStateExited: 1097 HandleInferiorState_Exited (process); 1098 break; 1099 1100 case StateType::eStateStopped: 1101 HandleInferiorState_Stopped (process); 1102 break; 1103 1104 default: 1105 if (log) 1106 { 1107 log->Printf ("GDBRemoteCommunicationServer::%s didn't handle state change for pid %" PRIu64 ", new state: %s", 1108 __FUNCTION__, 1109 process->GetID (), 1110 StateAsCString (state)); 1111 } 1112 break; 1113 } 1114 1115 // Remember the previous state reported to us. 1116 m_inferior_prev_state = state; 1117 } 1118 1119 void 1120 GDBRemoteCommunicationServer::DidExec (NativeProcessProtocol *process) 1121 { 1122 ClearProcessSpecificData (); 1123 } 1124 1125 GDBRemoteCommunication::PacketResult 1126 GDBRemoteCommunicationServer::SendONotification (const char *buffer, uint32_t len) 1127 { 1128 if ((buffer == nullptr) || (len == 0)) 1129 { 1130 // Nothing to send. 1131 return PacketResult::Success; 1132 } 1133 1134 StreamString response; 1135 response.PutChar ('O'); 1136 response.PutBytesAsRawHex8 (buffer, len); 1137 1138 return SendPacketNoLock (response.GetData (), response.GetSize ()); 1139 } 1140 1141 lldb_private::Error 1142 GDBRemoteCommunicationServer::SetSTDIOFileDescriptor (int fd) 1143 { 1144 Error error; 1145 1146 // Set up the Read Thread for reading/handling process I/O 1147 std::unique_ptr<ConnectionFileDescriptor> conn_up (new ConnectionFileDescriptor (fd, true)); 1148 if (!conn_up) 1149 { 1150 error.SetErrorString ("failed to create ConnectionFileDescriptor"); 1151 return error; 1152 } 1153 1154 m_stdio_communication.SetConnection (conn_up.release()); 1155 if (!m_stdio_communication.IsConnected ()) 1156 { 1157 error.SetErrorString ("failed to set connection for inferior I/O communication"); 1158 return error; 1159 } 1160 1161 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 1162 m_stdio_communication.StartReadThread(); 1163 1164 return error; 1165 } 1166 1167 void 1168 GDBRemoteCommunicationServer::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 1169 { 1170 GDBRemoteCommunicationServer *server = reinterpret_cast<GDBRemoteCommunicationServer*> (baton); 1171 static_cast<void> (server->SendONotification (static_cast<const char *>(src), src_len)); 1172 } 1173 1174 GDBRemoteCommunication::PacketResult 1175 GDBRemoteCommunicationServer::SendUnimplementedResponse (const char *) 1176 { 1177 // TODO: Log the packet we aren't handling... 1178 return SendPacketNoLock ("", 0); 1179 } 1180 1181 1182 GDBRemoteCommunication::PacketResult 1183 GDBRemoteCommunicationServer::SendErrorResponse (uint8_t err) 1184 { 1185 char packet[16]; 1186 int packet_len = ::snprintf (packet, sizeof(packet), "E%2.2x", err); 1187 assert (packet_len < (int)sizeof(packet)); 1188 return SendPacketNoLock (packet, packet_len); 1189 } 1190 1191 GDBRemoteCommunication::PacketResult 1192 GDBRemoteCommunicationServer::SendIllFormedResponse (const StringExtractorGDBRemote &failed_packet, const char *message) 1193 { 1194 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PACKETS)); 1195 if (log) 1196 log->Printf ("GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)", __FUNCTION__, failed_packet.GetStringRef ().c_str (), message ? message : ""); 1197 return SendErrorResponse (0x03); 1198 } 1199 1200 GDBRemoteCommunication::PacketResult 1201 GDBRemoteCommunicationServer::SendOKResponse () 1202 { 1203 return SendPacketNoLock ("OK", 2); 1204 } 1205 1206 bool 1207 GDBRemoteCommunicationServer::HandshakeWithClient(Error *error_ptr) 1208 { 1209 return GetAck() == PacketResult::Success; 1210 } 1211 1212 GDBRemoteCommunication::PacketResult 1213 GDBRemoteCommunicationServer::Handle_qHostInfo (StringExtractorGDBRemote &packet) 1214 { 1215 StreamString response; 1216 1217 // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00 1218 1219 ArchSpec host_arch(HostInfo::GetArchitecture()); 1220 const llvm::Triple &host_triple = host_arch.GetTriple(); 1221 response.PutCString("triple:"); 1222 response.PutCStringAsRawHex8(host_triple.getTriple().c_str()); 1223 response.Printf (";ptrsize:%u;",host_arch.GetAddressByteSize()); 1224 1225 const char* distribution_id = host_arch.GetDistributionId ().AsCString (); 1226 if (distribution_id) 1227 { 1228 response.PutCString("distribution_id:"); 1229 response.PutCStringAsRawHex8(distribution_id); 1230 response.PutCString(";"); 1231 } 1232 1233 // Only send out MachO info when lldb-platform/llgs is running on a MachO host. 1234 #if defined(__APPLE__) 1235 uint32_t cpu = host_arch.GetMachOCPUType(); 1236 uint32_t sub = host_arch.GetMachOCPUSubType(); 1237 if (cpu != LLDB_INVALID_CPUTYPE) 1238 response.Printf ("cputype:%u;", cpu); 1239 if (sub != LLDB_INVALID_CPUTYPE) 1240 response.Printf ("cpusubtype:%u;", sub); 1241 1242 if (cpu == ArchSpec::kCore_arm_any) 1243 response.Printf("watchpoint_exceptions_received:before;"); // On armv7 we use "synchronous" watchpoints which means the exception is delivered before the instruction executes. 1244 else 1245 response.Printf("watchpoint_exceptions_received:after;"); 1246 #else 1247 response.Printf("watchpoint_exceptions_received:after;"); 1248 #endif 1249 1250 switch (lldb::endian::InlHostByteOrder()) 1251 { 1252 case eByteOrderBig: response.PutCString ("endian:big;"); break; 1253 case eByteOrderLittle: response.PutCString ("endian:little;"); break; 1254 case eByteOrderPDP: response.PutCString ("endian:pdp;"); break; 1255 default: response.PutCString ("endian:unknown;"); break; 1256 } 1257 1258 uint32_t major = UINT32_MAX; 1259 uint32_t minor = UINT32_MAX; 1260 uint32_t update = UINT32_MAX; 1261 if (HostInfo::GetOSVersion(major, minor, update)) 1262 { 1263 if (major != UINT32_MAX) 1264 { 1265 response.Printf("os_version:%u", major); 1266 if (minor != UINT32_MAX) 1267 { 1268 response.Printf(".%u", minor); 1269 if (update != UINT32_MAX) 1270 response.Printf(".%u", update); 1271 } 1272 response.PutChar(';'); 1273 } 1274 } 1275 1276 std::string s; 1277 if (HostInfo::GetOSBuildString(s)) 1278 { 1279 response.PutCString ("os_build:"); 1280 response.PutCStringAsRawHex8(s.c_str()); 1281 response.PutChar(';'); 1282 } 1283 if (HostInfo::GetOSKernelDescription(s)) 1284 { 1285 response.PutCString ("os_kernel:"); 1286 response.PutCStringAsRawHex8(s.c_str()); 1287 response.PutChar(';'); 1288 } 1289 1290 #if defined(__APPLE__) 1291 1292 #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1293 // For iOS devices, we are connected through a USB Mux so we never pretend 1294 // to actually have a hostname as far as the remote lldb that is connecting 1295 // to this lldb-platform is concerned 1296 response.PutCString ("hostname:"); 1297 response.PutCStringAsRawHex8("127.0.0.1"); 1298 response.PutChar(';'); 1299 #else // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1300 if (HostInfo::GetHostname(s)) 1301 { 1302 response.PutCString ("hostname:"); 1303 response.PutCStringAsRawHex8(s.c_str()); 1304 response.PutChar(';'); 1305 } 1306 #endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1307 1308 #else // #if defined(__APPLE__) 1309 if (HostInfo::GetHostname(s)) 1310 { 1311 response.PutCString ("hostname:"); 1312 response.PutCStringAsRawHex8(s.c_str()); 1313 response.PutChar(';'); 1314 } 1315 #endif // #if defined(__APPLE__) 1316 1317 return SendPacketNoLock (response.GetData(), response.GetSize()); 1318 } 1319 1320 static void 1321 CreateProcessInfoResponse (const ProcessInstanceInfo &proc_info, StreamString &response) 1322 { 1323 response.Printf ("pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;", 1324 proc_info.GetProcessID(), 1325 proc_info.GetParentProcessID(), 1326 proc_info.GetUserID(), 1327 proc_info.GetGroupID(), 1328 proc_info.GetEffectiveUserID(), 1329 proc_info.GetEffectiveGroupID()); 1330 response.PutCString ("name:"); 1331 response.PutCStringAsRawHex8(proc_info.GetName()); 1332 response.PutChar(';'); 1333 const ArchSpec &proc_arch = proc_info.GetArchitecture(); 1334 if (proc_arch.IsValid()) 1335 { 1336 const llvm::Triple &proc_triple = proc_arch.GetTriple(); 1337 response.PutCString("triple:"); 1338 response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); 1339 response.PutChar(';'); 1340 } 1341 } 1342 1343 static void 1344 CreateProcessInfoResponse_DebugServerStyle (const ProcessInstanceInfo &proc_info, StreamString &response) 1345 { 1346 response.Printf ("pid:%" PRIx64 ";parent-pid:%" PRIx64 ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;", 1347 proc_info.GetProcessID(), 1348 proc_info.GetParentProcessID(), 1349 proc_info.GetUserID(), 1350 proc_info.GetGroupID(), 1351 proc_info.GetEffectiveUserID(), 1352 proc_info.GetEffectiveGroupID()); 1353 1354 const ArchSpec &proc_arch = proc_info.GetArchitecture(); 1355 if (proc_arch.IsValid()) 1356 { 1357 const llvm::Triple &proc_triple = proc_arch.GetTriple(); 1358 #if defined(__APPLE__) 1359 // We'll send cputype/cpusubtype. 1360 const uint32_t cpu_type = proc_arch.GetMachOCPUType(); 1361 if (cpu_type != 0) 1362 response.Printf ("cputype:%" PRIx32 ";", cpu_type); 1363 1364 const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType(); 1365 if (cpu_subtype != 0) 1366 response.Printf ("cpusubtype:%" PRIx32 ";", cpu_subtype); 1367 1368 1369 const std::string vendor = proc_triple.getVendorName (); 1370 if (!vendor.empty ()) 1371 response.Printf ("vendor:%s;", vendor.c_str ()); 1372 #else 1373 // We'll send the triple. 1374 response.PutCString("triple:"); 1375 response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); 1376 response.PutChar(';'); 1377 1378 #endif 1379 std::string ostype = proc_triple.getOSName (); 1380 // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64. 1381 if (proc_triple.getVendor () == llvm::Triple::Apple) 1382 { 1383 switch (proc_triple.getArch ()) 1384 { 1385 case llvm::Triple::arm: 1386 case llvm::Triple::aarch64: 1387 ostype = "ios"; 1388 break; 1389 default: 1390 // No change. 1391 break; 1392 } 1393 } 1394 response.Printf ("ostype:%s;", ostype.c_str ()); 1395 1396 1397 switch (proc_arch.GetByteOrder ()) 1398 { 1399 case lldb::eByteOrderLittle: response.PutCString ("endian:little;"); break; 1400 case lldb::eByteOrderBig: response.PutCString ("endian:big;"); break; 1401 case lldb::eByteOrderPDP: response.PutCString ("endian:pdp;"); break; 1402 default: 1403 // Nothing. 1404 break; 1405 } 1406 1407 if (proc_triple.isArch64Bit ()) 1408 response.PutCString ("ptrsize:8;"); 1409 else if (proc_triple.isArch32Bit ()) 1410 response.PutCString ("ptrsize:4;"); 1411 else if (proc_triple.isArch16Bit ()) 1412 response.PutCString ("ptrsize:2;"); 1413 } 1414 1415 } 1416 1417 1418 GDBRemoteCommunication::PacketResult 1419 GDBRemoteCommunicationServer::Handle_qProcessInfo (StringExtractorGDBRemote &packet) 1420 { 1421 // Only the gdb server handles this. 1422 if (!IsGdbServer ()) 1423 return SendUnimplementedResponse (packet.GetStringRef ().c_str ()); 1424 1425 // Fail if we don't have a current process. 1426 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 1427 return SendErrorResponse (68); 1428 1429 ProcessInstanceInfo proc_info; 1430 if (Host::GetProcessInfo (m_debugged_process_sp->GetID (), proc_info)) 1431 { 1432 StreamString response; 1433 CreateProcessInfoResponse_DebugServerStyle(proc_info, response); 1434 return SendPacketNoLock (response.GetData (), response.GetSize ()); 1435 } 1436 1437 return SendErrorResponse (1); 1438 } 1439 1440 GDBRemoteCommunication::PacketResult 1441 GDBRemoteCommunicationServer::Handle_qProcessInfoPID (StringExtractorGDBRemote &packet) 1442 { 1443 // Packet format: "qProcessInfoPID:%i" where %i is the pid 1444 packet.SetFilePos(::strlen ("qProcessInfoPID:")); 1445 lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID); 1446 if (pid != LLDB_INVALID_PROCESS_ID) 1447 { 1448 ProcessInstanceInfo proc_info; 1449 if (Host::GetProcessInfo(pid, proc_info)) 1450 { 1451 StreamString response; 1452 CreateProcessInfoResponse (proc_info, response); 1453 return SendPacketNoLock (response.GetData(), response.GetSize()); 1454 } 1455 } 1456 return SendErrorResponse (1); 1457 } 1458 1459 GDBRemoteCommunication::PacketResult 1460 GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet) 1461 { 1462 m_proc_infos_index = 0; 1463 m_proc_infos.Clear(); 1464 1465 ProcessInstanceInfoMatch match_info; 1466 packet.SetFilePos(::strlen ("qfProcessInfo")); 1467 if (packet.GetChar() == ':') 1468 { 1469 1470 std::string key; 1471 std::string value; 1472 while (packet.GetNameColonValue(key, value)) 1473 { 1474 bool success = true; 1475 if (key.compare("name") == 0) 1476 { 1477 StringExtractor extractor; 1478 extractor.GetStringRef().swap(value); 1479 extractor.GetHexByteString (value); 1480 match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false); 1481 } 1482 else if (key.compare("name_match") == 0) 1483 { 1484 if (value.compare("equals") == 0) 1485 { 1486 match_info.SetNameMatchType (eNameMatchEquals); 1487 } 1488 else if (value.compare("starts_with") == 0) 1489 { 1490 match_info.SetNameMatchType (eNameMatchStartsWith); 1491 } 1492 else if (value.compare("ends_with") == 0) 1493 { 1494 match_info.SetNameMatchType (eNameMatchEndsWith); 1495 } 1496 else if (value.compare("contains") == 0) 1497 { 1498 match_info.SetNameMatchType (eNameMatchContains); 1499 } 1500 else if (value.compare("regex") == 0) 1501 { 1502 match_info.SetNameMatchType (eNameMatchRegularExpression); 1503 } 1504 else 1505 { 1506 success = false; 1507 } 1508 } 1509 else if (key.compare("pid") == 0) 1510 { 1511 match_info.GetProcessInfo().SetProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); 1512 } 1513 else if (key.compare("parent_pid") == 0) 1514 { 1515 match_info.GetProcessInfo().SetParentProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); 1516 } 1517 else if (key.compare("uid") == 0) 1518 { 1519 match_info.GetProcessInfo().SetUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1520 } 1521 else if (key.compare("gid") == 0) 1522 { 1523 match_info.GetProcessInfo().SetGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1524 } 1525 else if (key.compare("euid") == 0) 1526 { 1527 match_info.GetProcessInfo().SetEffectiveUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1528 } 1529 else if (key.compare("egid") == 0) 1530 { 1531 match_info.GetProcessInfo().SetEffectiveGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1532 } 1533 else if (key.compare("all_users") == 0) 1534 { 1535 match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success)); 1536 } 1537 else if (key.compare("triple") == 0) 1538 { 1539 match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL); 1540 } 1541 else 1542 { 1543 success = false; 1544 } 1545 1546 if (!success) 1547 return SendErrorResponse (2); 1548 } 1549 } 1550 1551 if (Host::FindProcesses (match_info, m_proc_infos)) 1552 { 1553 // We found something, return the first item by calling the get 1554 // subsequent process info packet handler... 1555 return Handle_qsProcessInfo (packet); 1556 } 1557 return SendErrorResponse (3); 1558 } 1559 1560 GDBRemoteCommunication::PacketResult 1561 GDBRemoteCommunicationServer::Handle_qsProcessInfo (StringExtractorGDBRemote &packet) 1562 { 1563 if (m_proc_infos_index < m_proc_infos.GetSize()) 1564 { 1565 StreamString response; 1566 CreateProcessInfoResponse (m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response); 1567 ++m_proc_infos_index; 1568 return SendPacketNoLock (response.GetData(), response.GetSize()); 1569 } 1570 return SendErrorResponse (4); 1571 } 1572 1573 GDBRemoteCommunication::PacketResult 1574 GDBRemoteCommunicationServer::Handle_qUserName (StringExtractorGDBRemote &packet) 1575 { 1576 #if !defined(LLDB_DISABLE_POSIX) 1577 // Packet format: "qUserName:%i" where %i is the uid 1578 packet.SetFilePos(::strlen ("qUserName:")); 1579 uint32_t uid = packet.GetU32 (UINT32_MAX); 1580 if (uid != UINT32_MAX) 1581 { 1582 std::string name; 1583 if (HostInfo::LookupUserName(uid, name)) 1584 { 1585 StreamString response; 1586 response.PutCStringAsRawHex8 (name.c_str()); 1587 return SendPacketNoLock (response.GetData(), response.GetSize()); 1588 } 1589 } 1590 #endif 1591 return SendErrorResponse (5); 1592 1593 } 1594 1595 GDBRemoteCommunication::PacketResult 1596 GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet) 1597 { 1598 #if !defined(LLDB_DISABLE_POSIX) 1599 // Packet format: "qGroupName:%i" where %i is the gid 1600 packet.SetFilePos(::strlen ("qGroupName:")); 1601 uint32_t gid = packet.GetU32 (UINT32_MAX); 1602 if (gid != UINT32_MAX) 1603 { 1604 std::string name; 1605 if (HostInfo::LookupGroupName(gid, name)) 1606 { 1607 StreamString response; 1608 response.PutCStringAsRawHex8 (name.c_str()); 1609 return SendPacketNoLock (response.GetData(), response.GetSize()); 1610 } 1611 } 1612 #endif 1613 return SendErrorResponse (6); 1614 } 1615 1616 GDBRemoteCommunication::PacketResult 1617 GDBRemoteCommunicationServer::Handle_qSpeedTest (StringExtractorGDBRemote &packet) 1618 { 1619 packet.SetFilePos(::strlen ("qSpeedTest:")); 1620 1621 std::string key; 1622 std::string value; 1623 bool success = packet.GetNameColonValue(key, value); 1624 if (success && key.compare("response_size") == 0) 1625 { 1626 uint32_t response_size = Args::StringToUInt32(value.c_str(), 0, 0, &success); 1627 if (success) 1628 { 1629 if (response_size == 0) 1630 return SendOKResponse(); 1631 StreamString response; 1632 uint32_t bytes_left = response_size; 1633 response.PutCString("data:"); 1634 while (bytes_left > 0) 1635 { 1636 if (bytes_left >= 26) 1637 { 1638 response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 1639 bytes_left -= 26; 1640 } 1641 else 1642 { 1643 response.Printf ("%*.*s;", bytes_left, bytes_left, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 1644 bytes_left = 0; 1645 } 1646 } 1647 return SendPacketNoLock (response.GetData(), response.GetSize()); 1648 } 1649 } 1650 return SendErrorResponse (7); 1651 } 1652 1653 // 1654 //static bool 1655 //WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds) 1656 //{ 1657 // const int time_delta_usecs = 100000; 1658 // const int num_retries = timeout_in_seconds/time_delta_usecs; 1659 // for (int i=0; i<num_retries; i++) 1660 // { 1661 // struct proc_bsdinfo bsd_info; 1662 // int error = ::proc_pidinfo (pid, PROC_PIDTBSDINFO, 1663 // (uint64_t) 0, 1664 // &bsd_info, 1665 // PROC_PIDTBSDINFO_SIZE); 1666 // 1667 // switch (error) 1668 // { 1669 // case EINVAL: 1670 // case ENOTSUP: 1671 // case ESRCH: 1672 // case EPERM: 1673 // return false; 1674 // 1675 // default: 1676 // break; 1677 // 1678 // case 0: 1679 // if (bsd_info.pbi_status == SSTOP) 1680 // return true; 1681 // } 1682 // ::usleep (time_delta_usecs); 1683 // } 1684 // return false; 1685 //} 1686 1687 GDBRemoteCommunication::PacketResult 1688 GDBRemoteCommunicationServer::Handle_A (StringExtractorGDBRemote &packet) 1689 { 1690 // The 'A' packet is the most over designed packet ever here with 1691 // redundant argument indexes, redundant argument lengths and needed hex 1692 // encoded argument string values. Really all that is needed is a comma 1693 // separated hex encoded argument value list, but we will stay true to the 1694 // documented version of the 'A' packet here... 1695 1696 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1697 int actual_arg_index = 0; 1698 1699 packet.SetFilePos(1); // Skip the 'A' 1700 bool success = true; 1701 while (success && packet.GetBytesLeft() > 0) 1702 { 1703 // Decode the decimal argument string length. This length is the 1704 // number of hex nibbles in the argument string value. 1705 const uint32_t arg_len = packet.GetU32(UINT32_MAX); 1706 if (arg_len == UINT32_MAX) 1707 success = false; 1708 else 1709 { 1710 // Make sure the argument hex string length is followed by a comma 1711 if (packet.GetChar() != ',') 1712 success = false; 1713 else 1714 { 1715 // Decode the argument index. We ignore this really because 1716 // who would really send down the arguments in a random order??? 1717 const uint32_t arg_idx = packet.GetU32(UINT32_MAX); 1718 if (arg_idx == UINT32_MAX) 1719 success = false; 1720 else 1721 { 1722 // Make sure the argument index is followed by a comma 1723 if (packet.GetChar() != ',') 1724 success = false; 1725 else 1726 { 1727 // Decode the argument string value from hex bytes 1728 // back into a UTF8 string and make sure the length 1729 // matches the one supplied in the packet 1730 std::string arg; 1731 if (packet.GetHexByteStringFixedLength(arg, arg_len) != (arg_len / 2)) 1732 success = false; 1733 else 1734 { 1735 // If there are any bytes left 1736 if (packet.GetBytesLeft()) 1737 { 1738 if (packet.GetChar() != ',') 1739 success = false; 1740 } 1741 1742 if (success) 1743 { 1744 if (arg_idx == 0) 1745 m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false); 1746 m_process_launch_info.GetArguments().AppendArgument(arg.c_str()); 1747 if (log) 1748 log->Printf ("GDBRemoteCommunicationServer::%s added arg %d: \"%s\"", __FUNCTION__, actual_arg_index, arg.c_str ()); 1749 ++actual_arg_index; 1750 } 1751 } 1752 } 1753 } 1754 } 1755 } 1756 } 1757 1758 if (success) 1759 { 1760 m_process_launch_error = LaunchProcess (); 1761 if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) 1762 { 1763 return SendOKResponse (); 1764 } 1765 else 1766 { 1767 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1768 if (log) 1769 log->Printf("GDBRemoteCommunicationServer::%s failed to launch exe: %s", 1770 __FUNCTION__, 1771 m_process_launch_error.AsCString()); 1772 1773 } 1774 } 1775 return SendErrorResponse (8); 1776 } 1777 1778 GDBRemoteCommunication::PacketResult 1779 GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet) 1780 { 1781 StreamString response; 1782 1783 if (IsGdbServer ()) 1784 { 1785 // Fail if we don't have a current process. 1786 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 1787 return SendErrorResponse (68); 1788 1789 // Make sure we set the current thread so g and p packets return 1790 // the data the gdb will expect. 1791 lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); 1792 SetCurrentThreadID (tid); 1793 1794 NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetCurrentThread (); 1795 if (!thread_sp) 1796 return SendErrorResponse (69); 1797 1798 response.Printf ("QC%" PRIx64, thread_sp->GetID ()); 1799 } 1800 else 1801 { 1802 // NOTE: lldb should now be using qProcessInfo for process IDs. This path here 1803 // should not be used. It is reporting process id instead of thread id. The 1804 // correct answer doesn't seem to make much sense for lldb-platform. 1805 // CONSIDER: flip to "unsupported". 1806 lldb::pid_t pid = m_process_launch_info.GetProcessID(); 1807 response.Printf("QC%" PRIx64, pid); 1808 1809 // this should always be platform here 1810 assert (m_is_platform && "this code path should only be traversed for lldb-platform"); 1811 1812 if (m_is_platform) 1813 { 1814 // If we launch a process and this GDB server is acting as a platform, 1815 // then we need to clear the process launch state so we can start 1816 // launching another process. In order to launch a process a bunch or 1817 // packets need to be sent: environment packets, working directory, 1818 // disable ASLR, and many more settings. When we launch a process we 1819 // then need to know when to clear this information. Currently we are 1820 // selecting the 'qC' packet as that packet which seems to make the most 1821 // sense. 1822 if (pid != LLDB_INVALID_PROCESS_ID) 1823 { 1824 m_process_launch_info.Clear(); 1825 } 1826 } 1827 } 1828 return SendPacketNoLock (response.GetData(), response.GetSize()); 1829 } 1830 1831 bool 1832 GDBRemoteCommunicationServer::DebugserverProcessReaped (lldb::pid_t pid) 1833 { 1834 Mutex::Locker locker (m_spawned_pids_mutex); 1835 FreePortForProcess(pid); 1836 return m_spawned_pids.erase(pid) > 0; 1837 } 1838 bool 1839 GDBRemoteCommunicationServer::ReapDebugserverProcess (void *callback_baton, 1840 lldb::pid_t pid, 1841 bool exited, 1842 int signal, // Zero for no signal 1843 int status) // Exit value of process if signal is zero 1844 { 1845 GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; 1846 server->DebugserverProcessReaped (pid); 1847 return true; 1848 } 1849 1850 bool 1851 GDBRemoteCommunicationServer::DebuggedProcessReaped (lldb::pid_t pid) 1852 { 1853 // reap a process that we were debugging (but not debugserver) 1854 Mutex::Locker locker (m_spawned_pids_mutex); 1855 return m_spawned_pids.erase(pid) > 0; 1856 } 1857 1858 bool 1859 GDBRemoteCommunicationServer::ReapDebuggedProcess (void *callback_baton, 1860 lldb::pid_t pid, 1861 bool exited, 1862 int signal, // Zero for no signal 1863 int status) // Exit value of process if signal is zero 1864 { 1865 GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; 1866 server->DebuggedProcessReaped (pid); 1867 return true; 1868 } 1869 1870 GDBRemoteCommunication::PacketResult 1871 GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet) 1872 { 1873 #ifdef _WIN32 1874 return SendErrorResponse(9); 1875 #else 1876 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); 1877 1878 // Spawn a local debugserver as a platform so we can then attach or launch 1879 // a process... 1880 1881 if (m_is_platform) 1882 { 1883 if (log) 1884 log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); 1885 1886 // Sleep and wait a bit for debugserver to start to listen... 1887 ConnectionFileDescriptor file_conn; 1888 std::string hostname; 1889 // TODO: /tmp/ should not be hardcoded. User might want to override /tmp 1890 // with the TMPDIR environment variable 1891 packet.SetFilePos(::strlen ("qLaunchGDBServer;")); 1892 std::string name; 1893 std::string value; 1894 uint16_t port = UINT16_MAX; 1895 while (packet.GetNameColonValue(name, value)) 1896 { 1897 if (name.compare ("host") == 0) 1898 hostname.swap(value); 1899 else if (name.compare ("port") == 0) 1900 port = Args::StringToUInt32(value.c_str(), 0, 0); 1901 } 1902 if (port == UINT16_MAX) 1903 port = GetNextAvailablePort(); 1904 1905 // Spawn a new thread to accept the port that gets bound after 1906 // binding to port 0 (zero). 1907 1908 // Spawn a debugserver and try to get the port it listens to. 1909 ProcessLaunchInfo debugserver_launch_info; 1910 if (hostname.empty()) 1911 hostname = "127.0.0.1"; 1912 if (log) 1913 log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port); 1914 1915 debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false); 1916 1917 Error error = StartDebugserverProcess (hostname.empty() ? NULL : hostname.c_str(), 1918 port, 1919 debugserver_launch_info, 1920 port); 1921 1922 lldb::pid_t debugserver_pid = debugserver_launch_info.GetProcessID(); 1923 1924 1925 if (debugserver_pid != LLDB_INVALID_PROCESS_ID) 1926 { 1927 Mutex::Locker locker (m_spawned_pids_mutex); 1928 m_spawned_pids.insert(debugserver_pid); 1929 if (port > 0) 1930 AssociatePortWithProcess(port, debugserver_pid); 1931 } 1932 else 1933 { 1934 if (port > 0) 1935 FreePort (port); 1936 } 1937 1938 if (error.Success()) 1939 { 1940 if (log) 1941 log->Printf ("GDBRemoteCommunicationServer::%s() debugserver launched successfully as pid %" PRIu64, __FUNCTION__, debugserver_pid); 1942 1943 char response[256]; 1944 const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset); 1945 assert (response_len < (int)sizeof(response)); 1946 PacketResult packet_result = SendPacketNoLock (response, response_len); 1947 1948 if (packet_result != PacketResult::Success) 1949 { 1950 if (debugserver_pid != LLDB_INVALID_PROCESS_ID) 1951 ::kill (debugserver_pid, SIGINT); 1952 } 1953 return packet_result; 1954 } 1955 else 1956 { 1957 if (log) 1958 log->Printf ("GDBRemoteCommunicationServer::%s() debugserver launch failed: %s", __FUNCTION__, error.AsCString ()); 1959 } 1960 } 1961 return SendErrorResponse (9); 1962 #endif 1963 } 1964 1965 bool 1966 GDBRemoteCommunicationServer::KillSpawnedProcess (lldb::pid_t pid) 1967 { 1968 // make sure we know about this process 1969 { 1970 Mutex::Locker locker (m_spawned_pids_mutex); 1971 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 1972 return false; 1973 } 1974 1975 // first try a SIGTERM (standard kill) 1976 Host::Kill (pid, SIGTERM); 1977 1978 // check if that worked 1979 for (size_t i=0; i<10; ++i) 1980 { 1981 { 1982 Mutex::Locker locker (m_spawned_pids_mutex); 1983 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 1984 { 1985 // it is now killed 1986 return true; 1987 } 1988 } 1989 usleep (10000); 1990 } 1991 1992 // check one more time after the final usleep 1993 { 1994 Mutex::Locker locker (m_spawned_pids_mutex); 1995 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 1996 return true; 1997 } 1998 1999 // the launched process still lives. Now try killing it again, 2000 // this time with an unblockable signal. 2001 Host::Kill (pid, SIGKILL); 2002 2003 for (size_t i=0; i<10; ++i) 2004 { 2005 { 2006 Mutex::Locker locker (m_spawned_pids_mutex); 2007 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2008 { 2009 // it is now killed 2010 return true; 2011 } 2012 } 2013 usleep (10000); 2014 } 2015 2016 // check one more time after the final usleep 2017 // Scope for locker 2018 { 2019 Mutex::Locker locker (m_spawned_pids_mutex); 2020 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2021 return true; 2022 } 2023 2024 // no luck - the process still lives 2025 return false; 2026 } 2027 2028 GDBRemoteCommunication::PacketResult 2029 GDBRemoteCommunicationServer::Handle_qKillSpawnedProcess (StringExtractorGDBRemote &packet) 2030 { 2031 packet.SetFilePos(::strlen ("qKillSpawnedProcess:")); 2032 2033 lldb::pid_t pid = packet.GetU64(LLDB_INVALID_PROCESS_ID); 2034 2035 // verify that we know anything about this pid. 2036 // Scope for locker 2037 { 2038 Mutex::Locker locker (m_spawned_pids_mutex); 2039 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2040 { 2041 // not a pid we know about 2042 return SendErrorResponse (10); 2043 } 2044 } 2045 2046 // go ahead and attempt to kill the spawned process 2047 if (KillSpawnedProcess (pid)) 2048 return SendOKResponse (); 2049 else 2050 return SendErrorResponse (11); 2051 } 2052 2053 GDBRemoteCommunication::PacketResult 2054 GDBRemoteCommunicationServer::Handle_k (StringExtractorGDBRemote &packet) 2055 { 2056 // ignore for now if we're lldb_platform 2057 if (m_is_platform) 2058 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2059 2060 // shutdown all spawned processes 2061 std::set<lldb::pid_t> spawned_pids_copy; 2062 2063 // copy pids 2064 { 2065 Mutex::Locker locker (m_spawned_pids_mutex); 2066 spawned_pids_copy.insert (m_spawned_pids.begin (), m_spawned_pids.end ()); 2067 } 2068 2069 // nuke the spawned processes 2070 for (auto it = spawned_pids_copy.begin (); it != spawned_pids_copy.end (); ++it) 2071 { 2072 lldb::pid_t spawned_pid = *it; 2073 if (!KillSpawnedProcess (spawned_pid)) 2074 { 2075 fprintf (stderr, "%s: failed to kill spawned pid %" PRIu64 ", ignoring.\n", __FUNCTION__, spawned_pid); 2076 } 2077 } 2078 2079 FlushInferiorOutput (); 2080 2081 // No OK response for kill packet. 2082 // return SendOKResponse (); 2083 return PacketResult::Success; 2084 } 2085 2086 GDBRemoteCommunication::PacketResult 2087 GDBRemoteCommunicationServer::Handle_qLaunchSuccess (StringExtractorGDBRemote &packet) 2088 { 2089 if (m_process_launch_error.Success()) 2090 return SendOKResponse(); 2091 StreamString response; 2092 response.PutChar('E'); 2093 response.PutCString(m_process_launch_error.AsCString("<unknown error>")); 2094 return SendPacketNoLock (response.GetData(), response.GetSize()); 2095 } 2096 2097 GDBRemoteCommunication::PacketResult 2098 GDBRemoteCommunicationServer::Handle_QEnvironment (StringExtractorGDBRemote &packet) 2099 { 2100 packet.SetFilePos(::strlen ("QEnvironment:")); 2101 const uint32_t bytes_left = packet.GetBytesLeft(); 2102 if (bytes_left > 0) 2103 { 2104 m_process_launch_info.GetEnvironmentEntries ().AppendArgument (packet.Peek()); 2105 return SendOKResponse (); 2106 } 2107 return SendErrorResponse (12); 2108 } 2109 2110 GDBRemoteCommunication::PacketResult 2111 GDBRemoteCommunicationServer::Handle_QLaunchArch (StringExtractorGDBRemote &packet) 2112 { 2113 packet.SetFilePos(::strlen ("QLaunchArch:")); 2114 const uint32_t bytes_left = packet.GetBytesLeft(); 2115 if (bytes_left > 0) 2116 { 2117 const char* arch_triple = packet.Peek(); 2118 ArchSpec arch_spec(arch_triple,NULL); 2119 m_process_launch_info.SetArchitecture(arch_spec); 2120 return SendOKResponse(); 2121 } 2122 return SendErrorResponse(13); 2123 } 2124 2125 GDBRemoteCommunication::PacketResult 2126 GDBRemoteCommunicationServer::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet) 2127 { 2128 packet.SetFilePos(::strlen ("QSetDisableASLR:")); 2129 if (packet.GetU32(0)) 2130 m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR); 2131 else 2132 m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR); 2133 return SendOKResponse (); 2134 } 2135 2136 GDBRemoteCommunication::PacketResult 2137 GDBRemoteCommunicationServer::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet) 2138 { 2139 packet.SetFilePos(::strlen ("QSetWorkingDir:")); 2140 std::string path; 2141 packet.GetHexByteString(path); 2142 if (m_is_platform) 2143 { 2144 #ifdef _WIN32 2145 // Not implemented on Windows 2146 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_QSetWorkingDir unimplemented"); 2147 #else 2148 // If this packet is sent to a platform, then change the current working directory 2149 if (::chdir(path.c_str()) != 0) 2150 return SendErrorResponse(errno); 2151 #endif 2152 } 2153 else 2154 { 2155 m_process_launch_info.SwapWorkingDirectory (path); 2156 } 2157 return SendOKResponse (); 2158 } 2159 2160 GDBRemoteCommunication::PacketResult 2161 GDBRemoteCommunicationServer::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet) 2162 { 2163 StreamString response; 2164 2165 if (m_is_platform) 2166 { 2167 // If this packet is sent to a platform, then change the current working directory 2168 char cwd[PATH_MAX]; 2169 if (getcwd(cwd, sizeof(cwd)) == NULL) 2170 { 2171 return SendErrorResponse(errno); 2172 } 2173 else 2174 { 2175 response.PutBytesAsRawHex8(cwd, strlen(cwd)); 2176 return SendPacketNoLock(response.GetData(), response.GetSize()); 2177 } 2178 } 2179 else 2180 { 2181 const char *working_dir = m_process_launch_info.GetWorkingDirectory(); 2182 if (working_dir && working_dir[0]) 2183 { 2184 response.PutBytesAsRawHex8(working_dir, strlen(working_dir)); 2185 return SendPacketNoLock(response.GetData(), response.GetSize()); 2186 } 2187 else 2188 { 2189 return SendErrorResponse(14); 2190 } 2191 } 2192 } 2193 2194 GDBRemoteCommunication::PacketResult 2195 GDBRemoteCommunicationServer::Handle_QSetSTDIN (StringExtractorGDBRemote &packet) 2196 { 2197 packet.SetFilePos(::strlen ("QSetSTDIN:")); 2198 FileAction file_action; 2199 std::string path; 2200 packet.GetHexByteString(path); 2201 const bool read = false; 2202 const bool write = true; 2203 if (file_action.Open(STDIN_FILENO, path.c_str(), read, write)) 2204 { 2205 m_process_launch_info.AppendFileAction(file_action); 2206 return SendOKResponse (); 2207 } 2208 return SendErrorResponse (15); 2209 } 2210 2211 GDBRemoteCommunication::PacketResult 2212 GDBRemoteCommunicationServer::Handle_QSetSTDOUT (StringExtractorGDBRemote &packet) 2213 { 2214 packet.SetFilePos(::strlen ("QSetSTDOUT:")); 2215 FileAction file_action; 2216 std::string path; 2217 packet.GetHexByteString(path); 2218 const bool read = true; 2219 const bool write = false; 2220 if (file_action.Open(STDOUT_FILENO, path.c_str(), read, write)) 2221 { 2222 m_process_launch_info.AppendFileAction(file_action); 2223 return SendOKResponse (); 2224 } 2225 return SendErrorResponse (16); 2226 } 2227 2228 GDBRemoteCommunication::PacketResult 2229 GDBRemoteCommunicationServer::Handle_QSetSTDERR (StringExtractorGDBRemote &packet) 2230 { 2231 packet.SetFilePos(::strlen ("QSetSTDERR:")); 2232 FileAction file_action; 2233 std::string path; 2234 packet.GetHexByteString(path); 2235 const bool read = true; 2236 const bool write = false; 2237 if (file_action.Open(STDERR_FILENO, path.c_str(), read, write)) 2238 { 2239 m_process_launch_info.AppendFileAction(file_action); 2240 return SendOKResponse (); 2241 } 2242 return SendErrorResponse (17); 2243 } 2244 2245 GDBRemoteCommunication::PacketResult 2246 GDBRemoteCommunicationServer::Handle_C (StringExtractorGDBRemote &packet) 2247 { 2248 if (!IsGdbServer ()) 2249 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2250 2251 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 2252 if (log) 2253 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 2254 2255 // Ensure we have a native process. 2256 if (!m_debugged_process_sp) 2257 { 2258 if (log) 2259 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2260 return SendErrorResponse (0x36); 2261 } 2262 2263 // Pull out the signal number. 2264 packet.SetFilePos (::strlen ("C")); 2265 if (packet.GetBytesLeft () < 1) 2266 { 2267 // Shouldn't be using a C without a signal. 2268 return SendIllFormedResponse (packet, "C packet specified without signal."); 2269 } 2270 const uint32_t signo = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 2271 if (signo == std::numeric_limits<uint32_t>::max ()) 2272 return SendIllFormedResponse (packet, "failed to parse signal number"); 2273 2274 // Handle optional continue address. 2275 if (packet.GetBytesLeft () > 0) 2276 { 2277 // FIXME add continue at address support for $C{signo}[;{continue-address}]. 2278 if (*packet.Peek () == ';') 2279 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2280 else 2281 return SendIllFormedResponse (packet, "unexpected content after $C{signal-number}"); 2282 } 2283 2284 lldb_private::ResumeActionList resume_actions (StateType::eStateRunning, 0); 2285 Error error; 2286 2287 // We have two branches: what to do if a continue thread is specified (in which case we target 2288 // sending the signal to that thread), or when we don't have a continue thread set (in which 2289 // case we send a signal to the process). 2290 2291 // TODO discuss with Greg Clayton, make sure this makes sense. 2292 2293 lldb::tid_t signal_tid = GetContinueThreadID (); 2294 if (signal_tid != LLDB_INVALID_THREAD_ID) 2295 { 2296 // The resume action for the continue thread (or all threads if a continue thread is not set). 2297 lldb_private::ResumeAction action = { GetContinueThreadID (), StateType::eStateRunning, static_cast<int> (signo) }; 2298 2299 // Add the action for the continue thread (or all threads when the continue thread isn't present). 2300 resume_actions.Append (action); 2301 } 2302 else 2303 { 2304 // Send the signal to the process since we weren't targeting a specific continue thread with the signal. 2305 error = m_debugged_process_sp->Signal (signo); 2306 if (error.Fail ()) 2307 { 2308 if (log) 2309 log->Printf ("GDBRemoteCommunicationServer::%s failed to send signal for process %" PRIu64 ": %s", 2310 __FUNCTION__, 2311 m_debugged_process_sp->GetID (), 2312 error.AsCString ()); 2313 2314 return SendErrorResponse (0x52); 2315 } 2316 } 2317 2318 // Resume the threads. 2319 error = m_debugged_process_sp->Resume (resume_actions); 2320 if (error.Fail ()) 2321 { 2322 if (log) 2323 log->Printf ("GDBRemoteCommunicationServer::%s failed to resume threads for process %" PRIu64 ": %s", 2324 __FUNCTION__, 2325 m_debugged_process_sp->GetID (), 2326 error.AsCString ()); 2327 2328 return SendErrorResponse (0x38); 2329 } 2330 2331 // Don't send an "OK" packet; response is the stopped/exited message. 2332 return PacketResult::Success; 2333 } 2334 2335 GDBRemoteCommunication::PacketResult 2336 GDBRemoteCommunicationServer::Handle_c (StringExtractorGDBRemote &packet, bool skip_file_pos_adjustment) 2337 { 2338 if (!IsGdbServer ()) 2339 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2340 2341 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 2342 if (log) 2343 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 2344 2345 // We reuse this method in vCont - don't double adjust the file position. 2346 if (!skip_file_pos_adjustment) 2347 packet.SetFilePos (::strlen ("c")); 2348 2349 // For now just support all continue. 2350 const bool has_continue_address = (packet.GetBytesLeft () > 0); 2351 if (has_continue_address) 2352 { 2353 if (log) 2354 log->Printf ("GDBRemoteCommunicationServer::%s not implemented for c{address} variant [%s remains]", __FUNCTION__, packet.Peek ()); 2355 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2356 } 2357 2358 // Ensure we have a native process. 2359 if (!m_debugged_process_sp) 2360 { 2361 if (log) 2362 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2363 return SendErrorResponse (0x36); 2364 } 2365 2366 // Build the ResumeActionList 2367 lldb_private::ResumeActionList actions (StateType::eStateRunning, 0); 2368 2369 Error error = m_debugged_process_sp->Resume (actions); 2370 if (error.Fail ()) 2371 { 2372 if (log) 2373 { 2374 log->Printf ("GDBRemoteCommunicationServer::%s c failed for process %" PRIu64 ": %s", 2375 __FUNCTION__, 2376 m_debugged_process_sp->GetID (), 2377 error.AsCString ()); 2378 } 2379 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 2380 } 2381 2382 if (log) 2383 log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 2384 2385 // No response required from continue. 2386 return PacketResult::Success; 2387 } 2388 2389 GDBRemoteCommunication::PacketResult 2390 GDBRemoteCommunicationServer::Handle_vCont_actions (StringExtractorGDBRemote &packet) 2391 { 2392 if (!IsGdbServer ()) 2393 { 2394 // only llgs supports $vCont. 2395 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2396 } 2397 2398 StreamString response; 2399 response.Printf("vCont;c;C;s;S"); 2400 2401 return SendPacketNoLock(response.GetData(), response.GetSize()); 2402 } 2403 2404 GDBRemoteCommunication::PacketResult 2405 GDBRemoteCommunicationServer::Handle_vCont (StringExtractorGDBRemote &packet) 2406 { 2407 if (!IsGdbServer ()) 2408 { 2409 // only llgs supports $vCont 2410 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2411 } 2412 2413 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 2414 if (log) 2415 log->Printf ("GDBRemoteCommunicationServer::%s handling vCont packet", __FUNCTION__); 2416 2417 packet.SetFilePos (::strlen ("vCont")); 2418 2419 // Check if this is all continue (no options or ";c"). 2420 if (!packet.GetBytesLeft () || (::strcmp (packet.Peek (), ";c") == 0)) 2421 { 2422 // Move the packet past the ";c". 2423 if (packet.GetBytesLeft ()) 2424 packet.SetFilePos (packet.GetFilePos () + ::strlen (";c")); 2425 2426 const bool skip_file_pos_adjustment = true; 2427 return Handle_c (packet, skip_file_pos_adjustment); 2428 } 2429 else if (::strcmp (packet.Peek (), ";s") == 0) 2430 { 2431 // Move past the ';', then do a simple 's'. 2432 packet.SetFilePos (packet.GetFilePos () + 1); 2433 return Handle_s (packet); 2434 } 2435 2436 // Ensure we have a native process. 2437 if (!m_debugged_process_sp) 2438 { 2439 if (log) 2440 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2441 return SendErrorResponse (0x36); 2442 } 2443 2444 ResumeActionList thread_actions; 2445 2446 while (packet.GetBytesLeft () && *packet.Peek () == ';') 2447 { 2448 // Skip the semi-colon. 2449 packet.GetChar (); 2450 2451 // Build up the thread action. 2452 ResumeAction thread_action; 2453 thread_action.tid = LLDB_INVALID_THREAD_ID; 2454 thread_action.state = eStateInvalid; 2455 thread_action.signal = 0; 2456 2457 const char action = packet.GetChar (); 2458 switch (action) 2459 { 2460 case 'C': 2461 thread_action.signal = packet.GetHexMaxU32 (false, 0); 2462 if (thread_action.signal == 0) 2463 return SendIllFormedResponse (packet, "Could not parse signal in vCont packet C action"); 2464 // Fall through to next case... 2465 2466 case 'c': 2467 // Continue 2468 thread_action.state = eStateRunning; 2469 break; 2470 2471 case 'S': 2472 thread_action.signal = packet.GetHexMaxU32 (false, 0); 2473 if (thread_action.signal == 0) 2474 return SendIllFormedResponse (packet, "Could not parse signal in vCont packet S action"); 2475 // Fall through to next case... 2476 2477 case 's': 2478 // Step 2479 thread_action.state = eStateStepping; 2480 break; 2481 2482 default: 2483 return SendIllFormedResponse (packet, "Unsupported vCont action"); 2484 break; 2485 } 2486 2487 // Parse out optional :{thread-id} value. 2488 if (packet.GetBytesLeft () && (*packet.Peek () == ':')) 2489 { 2490 // Consume the separator. 2491 packet.GetChar (); 2492 2493 thread_action.tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); 2494 if (thread_action.tid == LLDB_INVALID_THREAD_ID) 2495 return SendIllFormedResponse (packet, "Could not parse thread number in vCont packet"); 2496 } 2497 2498 thread_actions.Append (thread_action); 2499 } 2500 2501 // If a default action for all other threads wasn't mentioned 2502 // then we should stop the threads. 2503 thread_actions.SetDefaultThreadActionIfNeeded (eStateStopped, 0); 2504 2505 Error error = m_debugged_process_sp->Resume (thread_actions); 2506 if (error.Fail ()) 2507 { 2508 if (log) 2509 { 2510 log->Printf ("GDBRemoteCommunicationServer::%s vCont failed for process %" PRIu64 ": %s", 2511 __FUNCTION__, 2512 m_debugged_process_sp->GetID (), 2513 error.AsCString ()); 2514 } 2515 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 2516 } 2517 2518 if (log) 2519 log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 2520 2521 // No response required from vCont. 2522 return PacketResult::Success; 2523 } 2524 2525 GDBRemoteCommunication::PacketResult 2526 GDBRemoteCommunicationServer::Handle_QStartNoAckMode (StringExtractorGDBRemote &packet) 2527 { 2528 // Send response first before changing m_send_acks to we ack this packet 2529 PacketResult packet_result = SendOKResponse (); 2530 m_send_acks = false; 2531 return packet_result; 2532 } 2533 2534 GDBRemoteCommunication::PacketResult 2535 GDBRemoteCommunicationServer::Handle_qPlatform_mkdir (StringExtractorGDBRemote &packet) 2536 { 2537 packet.SetFilePos(::strlen("qPlatform_mkdir:")); 2538 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); 2539 if (packet.GetChar() == ',') 2540 { 2541 std::string path; 2542 packet.GetHexByteString(path); 2543 Error error = FileSystem::MakeDirectory(path.c_str(), mode); 2544 if (error.Success()) 2545 return SendPacketNoLock ("OK", 2); 2546 else 2547 return SendErrorResponse(error.GetError()); 2548 } 2549 return SendErrorResponse(20); 2550 } 2551 2552 GDBRemoteCommunication::PacketResult 2553 GDBRemoteCommunicationServer::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet) 2554 { 2555 packet.SetFilePos(::strlen("qPlatform_chmod:")); 2556 2557 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); 2558 if (packet.GetChar() == ',') 2559 { 2560 std::string path; 2561 packet.GetHexByteString(path); 2562 Error error = FileSystem::SetFilePermissions(path.c_str(), mode); 2563 if (error.Success()) 2564 return SendPacketNoLock ("OK", 2); 2565 else 2566 return SendErrorResponse(error.GetError()); 2567 } 2568 return SendErrorResponse(19); 2569 } 2570 2571 GDBRemoteCommunication::PacketResult 2572 GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet) 2573 { 2574 packet.SetFilePos(::strlen("vFile:open:")); 2575 std::string path; 2576 packet.GetHexByteStringTerminatedBy(path,','); 2577 if (!path.empty()) 2578 { 2579 if (packet.GetChar() == ',') 2580 { 2581 uint32_t flags = packet.GetHexMaxU32(false, 0); 2582 if (packet.GetChar() == ',') 2583 { 2584 mode_t mode = packet.GetHexMaxU32(false, 0600); 2585 Error error; 2586 int fd = ::open (path.c_str(), flags, mode); 2587 const int save_errno = fd == -1 ? errno : 0; 2588 StreamString response; 2589 response.PutChar('F'); 2590 response.Printf("%i", fd); 2591 if (save_errno) 2592 response.Printf(",%i", save_errno); 2593 return SendPacketNoLock(response.GetData(), response.GetSize()); 2594 } 2595 } 2596 } 2597 return SendErrorResponse(18); 2598 } 2599 2600 GDBRemoteCommunication::PacketResult 2601 GDBRemoteCommunicationServer::Handle_vFile_Close (StringExtractorGDBRemote &packet) 2602 { 2603 packet.SetFilePos(::strlen("vFile:close:")); 2604 int fd = packet.GetS32(-1); 2605 Error error; 2606 int err = -1; 2607 int save_errno = 0; 2608 if (fd >= 0) 2609 { 2610 err = close(fd); 2611 save_errno = err == -1 ? errno : 0; 2612 } 2613 else 2614 { 2615 save_errno = EINVAL; 2616 } 2617 StreamString response; 2618 response.PutChar('F'); 2619 response.Printf("%i", err); 2620 if (save_errno) 2621 response.Printf(",%i", save_errno); 2622 return SendPacketNoLock(response.GetData(), response.GetSize()); 2623 } 2624 2625 GDBRemoteCommunication::PacketResult 2626 GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet) 2627 { 2628 #ifdef _WIN32 2629 // Not implemented on Windows 2630 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented"); 2631 #else 2632 StreamGDBRemote response; 2633 packet.SetFilePos(::strlen("vFile:pread:")); 2634 int fd = packet.GetS32(-1); 2635 if (packet.GetChar() == ',') 2636 { 2637 uint64_t count = packet.GetU64(UINT64_MAX); 2638 if (packet.GetChar() == ',') 2639 { 2640 uint64_t offset = packet.GetU64(UINT32_MAX); 2641 if (count == UINT64_MAX) 2642 { 2643 response.Printf("F-1:%i", EINVAL); 2644 return SendPacketNoLock(response.GetData(), response.GetSize()); 2645 } 2646 2647 std::string buffer(count, 0); 2648 const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset); 2649 const int save_errno = bytes_read == -1 ? errno : 0; 2650 response.PutChar('F'); 2651 response.Printf("%zi", bytes_read); 2652 if (save_errno) 2653 response.Printf(",%i", save_errno); 2654 else 2655 { 2656 response.PutChar(';'); 2657 response.PutEscapedBytes(&buffer[0], bytes_read); 2658 } 2659 return SendPacketNoLock(response.GetData(), response.GetSize()); 2660 } 2661 } 2662 return SendErrorResponse(21); 2663 2664 #endif 2665 } 2666 2667 GDBRemoteCommunication::PacketResult 2668 GDBRemoteCommunicationServer::Handle_vFile_pWrite (StringExtractorGDBRemote &packet) 2669 { 2670 #ifdef _WIN32 2671 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pWrite() unimplemented"); 2672 #else 2673 packet.SetFilePos(::strlen("vFile:pwrite:")); 2674 2675 StreamGDBRemote response; 2676 response.PutChar('F'); 2677 2678 int fd = packet.GetU32(UINT32_MAX); 2679 if (packet.GetChar() == ',') 2680 { 2681 off_t offset = packet.GetU64(UINT32_MAX); 2682 if (packet.GetChar() == ',') 2683 { 2684 std::string buffer; 2685 if (packet.GetEscapedBinaryData(buffer)) 2686 { 2687 const ssize_t bytes_written = ::pwrite (fd, buffer.data(), buffer.size(), offset); 2688 const int save_errno = bytes_written == -1 ? errno : 0; 2689 response.Printf("%zi", bytes_written); 2690 if (save_errno) 2691 response.Printf(",%i", save_errno); 2692 } 2693 else 2694 { 2695 response.Printf ("-1,%i", EINVAL); 2696 } 2697 return SendPacketNoLock(response.GetData(), response.GetSize()); 2698 } 2699 } 2700 return SendErrorResponse(27); 2701 #endif 2702 } 2703 2704 GDBRemoteCommunication::PacketResult 2705 GDBRemoteCommunicationServer::Handle_vFile_Size (StringExtractorGDBRemote &packet) 2706 { 2707 packet.SetFilePos(::strlen("vFile:size:")); 2708 std::string path; 2709 packet.GetHexByteString(path); 2710 if (!path.empty()) 2711 { 2712 lldb::user_id_t retcode = FileSystem::GetFileSize(FileSpec(path.c_str(), false)); 2713 StreamString response; 2714 response.PutChar('F'); 2715 response.PutHex64(retcode); 2716 if (retcode == UINT64_MAX) 2717 { 2718 response.PutChar(','); 2719 response.PutHex64(retcode); // TODO: replace with Host::GetSyswideErrorCode() 2720 } 2721 return SendPacketNoLock(response.GetData(), response.GetSize()); 2722 } 2723 return SendErrorResponse(22); 2724 } 2725 2726 GDBRemoteCommunication::PacketResult 2727 GDBRemoteCommunicationServer::Handle_vFile_Mode (StringExtractorGDBRemote &packet) 2728 { 2729 packet.SetFilePos(::strlen("vFile:mode:")); 2730 std::string path; 2731 packet.GetHexByteString(path); 2732 if (!path.empty()) 2733 { 2734 Error error; 2735 const uint32_t mode = File::GetPermissions(path.c_str(), error); 2736 StreamString response; 2737 response.Printf("F%u", mode); 2738 if (mode == 0 || error.Fail()) 2739 response.Printf(",%i", (int)error.GetError()); 2740 return SendPacketNoLock(response.GetData(), response.GetSize()); 2741 } 2742 return SendErrorResponse(23); 2743 } 2744 2745 GDBRemoteCommunication::PacketResult 2746 GDBRemoteCommunicationServer::Handle_vFile_Exists (StringExtractorGDBRemote &packet) 2747 { 2748 packet.SetFilePos(::strlen("vFile:exists:")); 2749 std::string path; 2750 packet.GetHexByteString(path); 2751 if (!path.empty()) 2752 { 2753 bool retcode = FileSystem::GetFileExists(FileSpec(path.c_str(), false)); 2754 StreamString response; 2755 response.PutChar('F'); 2756 response.PutChar(','); 2757 if (retcode) 2758 response.PutChar('1'); 2759 else 2760 response.PutChar('0'); 2761 return SendPacketNoLock(response.GetData(), response.GetSize()); 2762 } 2763 return SendErrorResponse(24); 2764 } 2765 2766 GDBRemoteCommunication::PacketResult 2767 GDBRemoteCommunicationServer::Handle_vFile_symlink (StringExtractorGDBRemote &packet) 2768 { 2769 packet.SetFilePos(::strlen("vFile:symlink:")); 2770 std::string dst, src; 2771 packet.GetHexByteStringTerminatedBy(dst, ','); 2772 packet.GetChar(); // Skip ',' char 2773 packet.GetHexByteString(src); 2774 Error error = FileSystem::Symlink(src.c_str(), dst.c_str()); 2775 StreamString response; 2776 response.Printf("F%u,%u", error.GetError(), error.GetError()); 2777 return SendPacketNoLock(response.GetData(), response.GetSize()); 2778 } 2779 2780 GDBRemoteCommunication::PacketResult 2781 GDBRemoteCommunicationServer::Handle_vFile_unlink (StringExtractorGDBRemote &packet) 2782 { 2783 packet.SetFilePos(::strlen("vFile:unlink:")); 2784 std::string path; 2785 packet.GetHexByteString(path); 2786 Error error = FileSystem::Unlink(path.c_str()); 2787 StreamString response; 2788 response.Printf("F%u,%u", error.GetError(), error.GetError()); 2789 return SendPacketNoLock(response.GetData(), response.GetSize()); 2790 } 2791 2792 GDBRemoteCommunication::PacketResult 2793 GDBRemoteCommunicationServer::Handle_qPlatform_shell (StringExtractorGDBRemote &packet) 2794 { 2795 packet.SetFilePos(::strlen("qPlatform_shell:")); 2796 std::string path; 2797 std::string working_dir; 2798 packet.GetHexByteStringTerminatedBy(path,','); 2799 if (!path.empty()) 2800 { 2801 if (packet.GetChar() == ',') 2802 { 2803 // FIXME: add timeout to qPlatform_shell packet 2804 // uint32_t timeout = packet.GetHexMaxU32(false, 32); 2805 uint32_t timeout = 10; 2806 if (packet.GetChar() == ',') 2807 packet.GetHexByteString(working_dir); 2808 int status, signo; 2809 std::string output; 2810 Error err = Host::RunShellCommand(path.c_str(), 2811 working_dir.empty() ? NULL : working_dir.c_str(), 2812 &status, &signo, &output, timeout); 2813 StreamGDBRemote response; 2814 if (err.Fail()) 2815 { 2816 response.PutCString("F,"); 2817 response.PutHex32(UINT32_MAX); 2818 } 2819 else 2820 { 2821 response.PutCString("F,"); 2822 response.PutHex32(status); 2823 response.PutChar(','); 2824 response.PutHex32(signo); 2825 response.PutChar(','); 2826 response.PutEscapedBytes(output.c_str(), output.size()); 2827 } 2828 return SendPacketNoLock(response.GetData(), response.GetSize()); 2829 } 2830 } 2831 return SendErrorResponse(24); 2832 } 2833 2834 void 2835 GDBRemoteCommunicationServer::SetCurrentThreadID (lldb::tid_t tid) 2836 { 2837 assert (IsGdbServer () && "SetCurrentThreadID() called when not GdbServer code"); 2838 2839 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); 2840 if (log) 2841 log->Printf ("GDBRemoteCommunicationServer::%s setting current thread id to %" PRIu64, __FUNCTION__, tid); 2842 2843 m_current_tid = tid; 2844 if (m_debugged_process_sp) 2845 m_debugged_process_sp->SetCurrentThreadID (m_current_tid); 2846 } 2847 2848 void 2849 GDBRemoteCommunicationServer::SetContinueThreadID (lldb::tid_t tid) 2850 { 2851 assert (IsGdbServer () && "SetContinueThreadID() called when not GdbServer code"); 2852 2853 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); 2854 if (log) 2855 log->Printf ("GDBRemoteCommunicationServer::%s setting continue thread id to %" PRIu64, __FUNCTION__, tid); 2856 2857 m_continue_tid = tid; 2858 } 2859 2860 GDBRemoteCommunication::PacketResult 2861 GDBRemoteCommunicationServer::Handle_stop_reason (StringExtractorGDBRemote &packet) 2862 { 2863 // Handle the $? gdbremote command. 2864 if (!IsGdbServer ()) 2865 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_stop_reason() unimplemented"); 2866 2867 // If no process, indicate error 2868 if (!m_debugged_process_sp) 2869 return SendErrorResponse (02); 2870 2871 return SendStopReasonForState (m_debugged_process_sp->GetState (), true); 2872 } 2873 2874 GDBRemoteCommunication::PacketResult 2875 GDBRemoteCommunicationServer::SendStopReasonForState (lldb::StateType process_state, bool flush_on_exit) 2876 { 2877 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 2878 2879 switch (process_state) 2880 { 2881 case eStateAttaching: 2882 case eStateLaunching: 2883 case eStateRunning: 2884 case eStateStepping: 2885 case eStateDetached: 2886 // NOTE: gdb protocol doc looks like it should return $OK 2887 // when everything is running (i.e. no stopped result). 2888 return PacketResult::Success; // Ignore 2889 2890 case eStateSuspended: 2891 case eStateStopped: 2892 case eStateCrashed: 2893 { 2894 lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); 2895 // Make sure we set the current thread so g and p packets return 2896 // the data the gdb will expect. 2897 SetCurrentThreadID (tid); 2898 return SendStopReplyPacketForThread (tid); 2899 } 2900 2901 case eStateInvalid: 2902 case eStateUnloaded: 2903 case eStateExited: 2904 if (flush_on_exit) 2905 FlushInferiorOutput (); 2906 return SendWResponse(m_debugged_process_sp.get()); 2907 2908 default: 2909 if (log) 2910 { 2911 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", current state reporting not handled: %s", 2912 __FUNCTION__, 2913 m_debugged_process_sp->GetID (), 2914 StateAsCString (process_state)); 2915 } 2916 break; 2917 } 2918 2919 return SendErrorResponse (0); 2920 } 2921 2922 GDBRemoteCommunication::PacketResult 2923 GDBRemoteCommunicationServer::Handle_vFile_Stat (StringExtractorGDBRemote &packet) 2924 { 2925 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_Stat() unimplemented"); 2926 } 2927 2928 GDBRemoteCommunication::PacketResult 2929 GDBRemoteCommunicationServer::Handle_vFile_MD5 (StringExtractorGDBRemote &packet) 2930 { 2931 packet.SetFilePos(::strlen("vFile:MD5:")); 2932 std::string path; 2933 packet.GetHexByteString(path); 2934 if (!path.empty()) 2935 { 2936 uint64_t a,b; 2937 StreamGDBRemote response; 2938 if (FileSystem::CalculateMD5(FileSpec(path.c_str(), false), a, b) == false) 2939 { 2940 response.PutCString("F,"); 2941 response.PutCString("x"); 2942 } 2943 else 2944 { 2945 response.PutCString("F,"); 2946 response.PutHex64(a); 2947 response.PutHex64(b); 2948 } 2949 return SendPacketNoLock(response.GetData(), response.GetSize()); 2950 } 2951 return SendErrorResponse(25); 2952 } 2953 2954 GDBRemoteCommunication::PacketResult 2955 GDBRemoteCommunicationServer::Handle_qRegisterInfo (StringExtractorGDBRemote &packet) 2956 { 2957 // Ensure we're llgs. 2958 if (!IsGdbServer()) 2959 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qRegisterInfo() unimplemented"); 2960 2961 // Fail if we don't have a current process. 2962 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 2963 return SendErrorResponse (68); 2964 2965 // Ensure we have a thread. 2966 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadAtIndex (0)); 2967 if (!thread_sp) 2968 return SendErrorResponse (69); 2969 2970 // Get the register context for the first thread. 2971 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 2972 if (!reg_context_sp) 2973 return SendErrorResponse (69); 2974 2975 // Parse out the register number from the request. 2976 packet.SetFilePos (strlen("qRegisterInfo")); 2977 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 2978 if (reg_index == std::numeric_limits<uint32_t>::max ()) 2979 return SendErrorResponse (69); 2980 2981 // Return the end of registers response if we've iterated one past the end of the register set. 2982 if (reg_index >= reg_context_sp->GetRegisterCount ()) 2983 return SendErrorResponse (69); 2984 2985 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 2986 if (!reg_info) 2987 return SendErrorResponse (69); 2988 2989 // Build the reginfos response. 2990 StreamGDBRemote response; 2991 2992 response.PutCString ("name:"); 2993 response.PutCString (reg_info->name); 2994 response.PutChar (';'); 2995 2996 if (reg_info->alt_name && reg_info->alt_name[0]) 2997 { 2998 response.PutCString ("alt-name:"); 2999 response.PutCString (reg_info->alt_name); 3000 response.PutChar (';'); 3001 } 3002 3003 response.Printf ("bitsize:%" PRIu32 ";offset:%" PRIu32 ";", reg_info->byte_size * 8, reg_info->byte_offset); 3004 3005 switch (reg_info->encoding) 3006 { 3007 case eEncodingUint: response.PutCString ("encoding:uint;"); break; 3008 case eEncodingSint: response.PutCString ("encoding:sint;"); break; 3009 case eEncodingIEEE754: response.PutCString ("encoding:ieee754;"); break; 3010 case eEncodingVector: response.PutCString ("encoding:vector;"); break; 3011 default: break; 3012 } 3013 3014 switch (reg_info->format) 3015 { 3016 case eFormatBinary: response.PutCString ("format:binary;"); break; 3017 case eFormatDecimal: response.PutCString ("format:decimal;"); break; 3018 case eFormatHex: response.PutCString ("format:hex;"); break; 3019 case eFormatFloat: response.PutCString ("format:float;"); break; 3020 case eFormatVectorOfSInt8: response.PutCString ("format:vector-sint8;"); break; 3021 case eFormatVectorOfUInt8: response.PutCString ("format:vector-uint8;"); break; 3022 case eFormatVectorOfSInt16: response.PutCString ("format:vector-sint16;"); break; 3023 case eFormatVectorOfUInt16: response.PutCString ("format:vector-uint16;"); break; 3024 case eFormatVectorOfSInt32: response.PutCString ("format:vector-sint32;"); break; 3025 case eFormatVectorOfUInt32: response.PutCString ("format:vector-uint32;"); break; 3026 case eFormatVectorOfFloat32: response.PutCString ("format:vector-float32;"); break; 3027 case eFormatVectorOfUInt128: response.PutCString ("format:vector-uint128;"); break; 3028 default: break; 3029 }; 3030 3031 const char *const register_set_name = reg_context_sp->GetRegisterSetNameForRegisterAtIndex(reg_index); 3032 if (register_set_name) 3033 { 3034 response.PutCString ("set:"); 3035 response.PutCString (register_set_name); 3036 response.PutChar (';'); 3037 } 3038 3039 if (reg_info->kinds[RegisterKind::eRegisterKindGCC] != LLDB_INVALID_REGNUM) 3040 response.Printf ("gcc:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindGCC]); 3041 3042 if (reg_info->kinds[RegisterKind::eRegisterKindDWARF] != LLDB_INVALID_REGNUM) 3043 response.Printf ("dwarf:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindDWARF]); 3044 3045 switch (reg_info->kinds[RegisterKind::eRegisterKindGeneric]) 3046 { 3047 case LLDB_REGNUM_GENERIC_PC: response.PutCString("generic:pc;"); break; 3048 case LLDB_REGNUM_GENERIC_SP: response.PutCString("generic:sp;"); break; 3049 case LLDB_REGNUM_GENERIC_FP: response.PutCString("generic:fp;"); break; 3050 case LLDB_REGNUM_GENERIC_RA: response.PutCString("generic:ra;"); break; 3051 case LLDB_REGNUM_GENERIC_FLAGS: response.PutCString("generic:flags;"); break; 3052 case LLDB_REGNUM_GENERIC_ARG1: response.PutCString("generic:arg1;"); break; 3053 case LLDB_REGNUM_GENERIC_ARG2: response.PutCString("generic:arg2;"); break; 3054 case LLDB_REGNUM_GENERIC_ARG3: response.PutCString("generic:arg3;"); break; 3055 case LLDB_REGNUM_GENERIC_ARG4: response.PutCString("generic:arg4;"); break; 3056 case LLDB_REGNUM_GENERIC_ARG5: response.PutCString("generic:arg5;"); break; 3057 case LLDB_REGNUM_GENERIC_ARG6: response.PutCString("generic:arg6;"); break; 3058 case LLDB_REGNUM_GENERIC_ARG7: response.PutCString("generic:arg7;"); break; 3059 case LLDB_REGNUM_GENERIC_ARG8: response.PutCString("generic:arg8;"); break; 3060 default: break; 3061 } 3062 3063 if (reg_info->value_regs && reg_info->value_regs[0] != LLDB_INVALID_REGNUM) 3064 { 3065 response.PutCString ("container-regs:"); 3066 int i = 0; 3067 for (const uint32_t *reg_num = reg_info->value_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) 3068 { 3069 if (i > 0) 3070 response.PutChar (','); 3071 response.Printf ("%" PRIx32, *reg_num); 3072 } 3073 response.PutChar (';'); 3074 } 3075 3076 if (reg_info->invalidate_regs && reg_info->invalidate_regs[0]) 3077 { 3078 response.PutCString ("invalidate-regs:"); 3079 int i = 0; 3080 for (const uint32_t *reg_num = reg_info->invalidate_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) 3081 { 3082 if (i > 0) 3083 response.PutChar (','); 3084 response.Printf ("%" PRIx32, *reg_num); 3085 } 3086 response.PutChar (';'); 3087 } 3088 3089 return SendPacketNoLock(response.GetData(), response.GetSize()); 3090 } 3091 3092 GDBRemoteCommunication::PacketResult 3093 GDBRemoteCommunicationServer::Handle_qfThreadInfo (StringExtractorGDBRemote &packet) 3094 { 3095 // Ensure we're llgs. 3096 if (!IsGdbServer()) 3097 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qfThreadInfo() unimplemented"); 3098 3099 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3100 3101 // Fail if we don't have a current process. 3102 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3103 { 3104 if (log) 3105 log->Printf ("GDBRemoteCommunicationServer::%s() no process (%s), returning OK", __FUNCTION__, m_debugged_process_sp ? "invalid process id" : "null m_debugged_process_sp"); 3106 return SendOKResponse (); 3107 } 3108 3109 StreamGDBRemote response; 3110 response.PutChar ('m'); 3111 3112 if (log) 3113 log->Printf ("GDBRemoteCommunicationServer::%s() starting thread iteration", __FUNCTION__); 3114 3115 NativeThreadProtocolSP thread_sp; 3116 uint32_t thread_index; 3117 for (thread_index = 0, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); 3118 thread_sp; 3119 ++thread_index, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index)) 3120 { 3121 if (log) 3122 log->Printf ("GDBRemoteCommunicationServer::%s() iterated thread %" PRIu32 "(%s, tid=0x%" PRIx64 ")", __FUNCTION__, thread_index, thread_sp ? "is not null" : "null", thread_sp ? thread_sp->GetID () : LLDB_INVALID_THREAD_ID); 3123 if (thread_index > 0) 3124 response.PutChar(','); 3125 response.Printf ("%" PRIx64, thread_sp->GetID ()); 3126 } 3127 3128 if (log) 3129 log->Printf ("GDBRemoteCommunicationServer::%s() finished thread iteration", __FUNCTION__); 3130 3131 return SendPacketNoLock(response.GetData(), response.GetSize()); 3132 } 3133 3134 GDBRemoteCommunication::PacketResult 3135 GDBRemoteCommunicationServer::Handle_qsThreadInfo (StringExtractorGDBRemote &packet) 3136 { 3137 // Ensure we're llgs. 3138 if (!IsGdbServer()) 3139 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_qsThreadInfo() unimplemented"); 3140 3141 // FIXME for now we return the full thread list in the initial packet and always do nothing here. 3142 return SendPacketNoLock ("l", 1); 3143 } 3144 3145 GDBRemoteCommunication::PacketResult 3146 GDBRemoteCommunicationServer::Handle_p (StringExtractorGDBRemote &packet) 3147 { 3148 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3149 3150 // Ensure we're llgs. 3151 if (!IsGdbServer()) 3152 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_p() unimplemented"); 3153 3154 // Parse out the register number from the request. 3155 packet.SetFilePos (strlen("p")); 3156 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3157 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3158 { 3159 if (log) 3160 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 3161 return SendErrorResponse (0x15); 3162 } 3163 3164 // Get the thread to use. 3165 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 3166 if (!thread_sp) 3167 { 3168 if (log) 3169 log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available", __FUNCTION__); 3170 return SendErrorResponse (0x15); 3171 } 3172 3173 // Get the thread's register context. 3174 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3175 if (!reg_context_sp) 3176 { 3177 if (log) 3178 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); 3179 return SendErrorResponse (0x15); 3180 } 3181 3182 // Return the end of registers response if we've iterated one past the end of the register set. 3183 if (reg_index >= reg_context_sp->GetRegisterCount ()) 3184 { 3185 if (log) 3186 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetRegisterCount ()); 3187 return SendErrorResponse (0x15); 3188 } 3189 3190 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3191 if (!reg_info) 3192 { 3193 if (log) 3194 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); 3195 return SendErrorResponse (0x15); 3196 } 3197 3198 // Build the reginfos response. 3199 StreamGDBRemote response; 3200 3201 // Retrieve the value 3202 RegisterValue reg_value; 3203 Error error = reg_context_sp->ReadRegister (reg_info, reg_value); 3204 if (error.Fail ()) 3205 { 3206 if (log) 3207 log->Printf ("GDBRemoteCommunicationServer::%s failed, read of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); 3208 return SendErrorResponse (0x15); 3209 } 3210 3211 const uint8_t *const data = reinterpret_cast<const uint8_t*> (reg_value.GetBytes ()); 3212 if (!data) 3213 { 3214 if (log) 3215 log->Printf ("GDBRemoteCommunicationServer::%s failed to get data bytes from requested register %" PRIu32, __FUNCTION__, reg_index); 3216 return SendErrorResponse (0x15); 3217 } 3218 3219 // FIXME flip as needed to get data in big/little endian format for this host. 3220 for (uint32_t i = 0; i < reg_value.GetByteSize (); ++i) 3221 response.PutHex8 (data[i]); 3222 3223 return SendPacketNoLock (response.GetData (), response.GetSize ()); 3224 } 3225 3226 GDBRemoteCommunication::PacketResult 3227 GDBRemoteCommunicationServer::Handle_P (StringExtractorGDBRemote &packet) 3228 { 3229 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3230 3231 // Ensure we're llgs. 3232 if (!IsGdbServer()) 3233 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_P() unimplemented"); 3234 3235 // Ensure there is more content. 3236 if (packet.GetBytesLeft () < 1) 3237 return SendIllFormedResponse (packet, "Empty P packet"); 3238 3239 // Parse out the register number from the request. 3240 packet.SetFilePos (strlen("P")); 3241 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3242 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3243 { 3244 if (log) 3245 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 3246 return SendErrorResponse (0x29); 3247 } 3248 3249 // Note debugserver would send an E30 here. 3250 if ((packet.GetBytesLeft () < 1) || (packet.GetChar () != '=')) 3251 return SendIllFormedResponse (packet, "P packet missing '=' char after register number"); 3252 3253 // Get process architecture. 3254 ArchSpec process_arch; 3255 if (!m_debugged_process_sp || !m_debugged_process_sp->GetArchitecture (process_arch)) 3256 { 3257 if (log) 3258 log->Printf ("GDBRemoteCommunicationServer::%s failed to retrieve inferior architecture", __FUNCTION__); 3259 return SendErrorResponse (0x49); 3260 } 3261 3262 // Parse out the value. 3263 const uint64_t raw_value = packet.GetHexMaxU64 (process_arch.GetByteOrder () == lldb::eByteOrderLittle, std::numeric_limits<uint64_t>::max ()); 3264 3265 // Get the thread to use. 3266 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 3267 if (!thread_sp) 3268 { 3269 if (log) 3270 log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available (thread index 0)", __FUNCTION__); 3271 return SendErrorResponse (0x28); 3272 } 3273 3274 // Get the thread's register context. 3275 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3276 if (!reg_context_sp) 3277 { 3278 if (log) 3279 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); 3280 return SendErrorResponse (0x15); 3281 } 3282 3283 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3284 if (!reg_info) 3285 { 3286 if (log) 3287 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); 3288 return SendErrorResponse (0x48); 3289 } 3290 3291 // Return the end of registers response if we've iterated one past the end of the register set. 3292 if (reg_index >= reg_context_sp->GetRegisterCount ()) 3293 { 3294 if (log) 3295 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetRegisterCount ()); 3296 return SendErrorResponse (0x47); 3297 } 3298 3299 3300 // Build the reginfos response. 3301 StreamGDBRemote response; 3302 3303 // FIXME Could be suffixed with a thread: parameter. 3304 // That thread then needs to be fed back into the reg context retrieval above. 3305 Error error = reg_context_sp->WriteRegisterFromUnsigned (reg_info, raw_value); 3306 if (error.Fail ()) 3307 { 3308 if (log) 3309 log->Printf ("GDBRemoteCommunicationServer::%s failed, write of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); 3310 return SendErrorResponse (0x32); 3311 } 3312 3313 return SendOKResponse(); 3314 } 3315 3316 GDBRemoteCommunicationServer::PacketResult 3317 GDBRemoteCommunicationServer::Handle_H (StringExtractorGDBRemote &packet) 3318 { 3319 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3320 3321 // Ensure we're llgs. 3322 if (!IsGdbServer()) 3323 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_H() unimplemented"); 3324 3325 // Fail if we don't have a current process. 3326 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3327 { 3328 if (log) 3329 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3330 return SendErrorResponse (0x15); 3331 } 3332 3333 // Parse out which variant of $H is requested. 3334 packet.SetFilePos (strlen("H")); 3335 if (packet.GetBytesLeft () < 1) 3336 { 3337 if (log) 3338 log->Printf ("GDBRemoteCommunicationServer::%s failed, H command missing {g,c} variant", __FUNCTION__); 3339 return SendIllFormedResponse (packet, "H command missing {g,c} variant"); 3340 } 3341 3342 const char h_variant = packet.GetChar (); 3343 switch (h_variant) 3344 { 3345 case 'g': 3346 break; 3347 3348 case 'c': 3349 break; 3350 3351 default: 3352 if (log) 3353 log->Printf ("GDBRemoteCommunicationServer::%s failed, invalid $H variant %c", __FUNCTION__, h_variant); 3354 return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); 3355 } 3356 3357 // Parse out the thread number. 3358 // FIXME return a parse success/fail value. All values are valid here. 3359 const lldb::tid_t tid = packet.GetHexMaxU64 (false, std::numeric_limits<lldb::tid_t>::max ()); 3360 3361 // Ensure we have the given thread when not specifying -1 (all threads) or 0 (any thread). 3362 if (tid != LLDB_INVALID_THREAD_ID && tid != 0) 3363 { 3364 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); 3365 if (!thread_sp) 3366 { 3367 if (log) 3368 log->Printf ("GDBRemoteCommunicationServer::%s failed, tid %" PRIu64 " not found", __FUNCTION__, tid); 3369 return SendErrorResponse (0x15); 3370 } 3371 } 3372 3373 // Now switch the given thread type. 3374 switch (h_variant) 3375 { 3376 case 'g': 3377 SetCurrentThreadID (tid); 3378 break; 3379 3380 case 'c': 3381 SetContinueThreadID (tid); 3382 break; 3383 3384 default: 3385 assert (false && "unsupported $H variant - shouldn't get here"); 3386 return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); 3387 } 3388 3389 return SendOKResponse(); 3390 } 3391 3392 GDBRemoteCommunicationServer::PacketResult 3393 GDBRemoteCommunicationServer::Handle_interrupt (StringExtractorGDBRemote &packet) 3394 { 3395 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 3396 3397 // Ensure we're llgs. 3398 if (!IsGdbServer()) 3399 { 3400 // Only supported on llgs 3401 return SendUnimplementedResponse (""); 3402 } 3403 3404 // Fail if we don't have a current process. 3405 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3406 { 3407 if (log) 3408 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3409 return SendErrorResponse (0x15); 3410 } 3411 3412 // Interrupt the process. 3413 Error error = m_debugged_process_sp->Interrupt (); 3414 if (error.Fail ()) 3415 { 3416 if (log) 3417 { 3418 log->Printf ("GDBRemoteCommunicationServer::%s failed for process %" PRIu64 ": %s", 3419 __FUNCTION__, 3420 m_debugged_process_sp->GetID (), 3421 error.AsCString ()); 3422 } 3423 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 3424 } 3425 3426 if (log) 3427 log->Printf ("GDBRemoteCommunicationServer::%s stopped process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 3428 3429 // No response required from stop all. 3430 return PacketResult::Success; 3431 } 3432 3433 GDBRemoteCommunicationServer::PacketResult 3434 GDBRemoteCommunicationServer::Handle_m (StringExtractorGDBRemote &packet) 3435 { 3436 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3437 3438 // Ensure we're llgs. 3439 if (!IsGdbServer()) 3440 { 3441 // Only supported on llgs 3442 return SendUnimplementedResponse (""); 3443 } 3444 3445 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3446 { 3447 if (log) 3448 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3449 return SendErrorResponse (0x15); 3450 } 3451 3452 // Parse out the memory address. 3453 packet.SetFilePos (strlen("m")); 3454 if (packet.GetBytesLeft() < 1) 3455 return SendIllFormedResponse(packet, "Too short m packet"); 3456 3457 // Read the address. Punting on validation. 3458 // FIXME replace with Hex U64 read with no default value that fails on failed read. 3459 const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); 3460 3461 // Validate comma. 3462 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) 3463 return SendIllFormedResponse(packet, "Comma sep missing in m packet"); 3464 3465 // Get # bytes to read. 3466 if (packet.GetBytesLeft() < 1) 3467 return SendIllFormedResponse(packet, "Length missing in m packet"); 3468 3469 const uint64_t byte_count = packet.GetHexMaxU64(false, 0); 3470 if (byte_count == 0) 3471 { 3472 if (log) 3473 log->Printf ("GDBRemoteCommunicationServer::%s nothing to read: zero-length packet", __FUNCTION__); 3474 return PacketResult::Success; 3475 } 3476 3477 // Allocate the response buffer. 3478 std::string buf(byte_count, '\0'); 3479 if (buf.empty()) 3480 return SendErrorResponse (0x78); 3481 3482 3483 // Retrieve the process memory. 3484 lldb::addr_t bytes_read = 0; 3485 lldb_private::Error error = m_debugged_process_sp->ReadMemory (read_addr, &buf[0], byte_count, bytes_read); 3486 if (error.Fail ()) 3487 { 3488 if (log) 3489 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to read. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, error.AsCString ()); 3490 return SendErrorResponse (0x08); 3491 } 3492 3493 if (bytes_read == 0) 3494 { 3495 if (log) 3496 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": read %" PRIu64 " of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, bytes_read, byte_count); 3497 return SendErrorResponse (0x08); 3498 } 3499 3500 StreamGDBRemote response; 3501 for (lldb::addr_t i = 0; i < bytes_read; ++i) 3502 response.PutHex8(buf[i]); 3503 3504 return SendPacketNoLock(response.GetData(), response.GetSize()); 3505 } 3506 3507 GDBRemoteCommunication::PacketResult 3508 GDBRemoteCommunicationServer::Handle_QSetDetachOnError (StringExtractorGDBRemote &packet) 3509 { 3510 packet.SetFilePos(::strlen ("QSetDetachOnError:")); 3511 if (packet.GetU32(0)) 3512 m_process_launch_info.GetFlags().Set (eLaunchFlagDetachOnError); 3513 else 3514 m_process_launch_info.GetFlags().Clear (eLaunchFlagDetachOnError); 3515 return SendOKResponse (); 3516 } 3517 3518 GDBRemoteCommunicationServer::PacketResult 3519 GDBRemoteCommunicationServer::Handle_M (StringExtractorGDBRemote &packet) 3520 { 3521 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3522 3523 // Ensure we're llgs. 3524 if (!IsGdbServer()) 3525 { 3526 // Only supported on llgs 3527 return SendUnimplementedResponse (""); 3528 } 3529 3530 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3531 { 3532 if (log) 3533 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3534 return SendErrorResponse (0x15); 3535 } 3536 3537 // Parse out the memory address. 3538 packet.SetFilePos (strlen("M")); 3539 if (packet.GetBytesLeft() < 1) 3540 return SendIllFormedResponse(packet, "Too short M packet"); 3541 3542 // Read the address. Punting on validation. 3543 // FIXME replace with Hex U64 read with no default value that fails on failed read. 3544 const lldb::addr_t write_addr = packet.GetHexMaxU64(false, 0); 3545 3546 // Validate comma. 3547 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) 3548 return SendIllFormedResponse(packet, "Comma sep missing in M packet"); 3549 3550 // Get # bytes to read. 3551 if (packet.GetBytesLeft() < 1) 3552 return SendIllFormedResponse(packet, "Length missing in M packet"); 3553 3554 const uint64_t byte_count = packet.GetHexMaxU64(false, 0); 3555 if (byte_count == 0) 3556 { 3557 if (log) 3558 log->Printf ("GDBRemoteCommunicationServer::%s nothing to write: zero-length packet", __FUNCTION__); 3559 return PacketResult::Success; 3560 } 3561 3562 // Validate colon. 3563 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ':')) 3564 return SendIllFormedResponse(packet, "Comma sep missing in M packet after byte length"); 3565 3566 // Allocate the conversion buffer. 3567 std::vector<uint8_t> buf(byte_count, 0); 3568 if (buf.empty()) 3569 return SendErrorResponse (0x78); 3570 3571 // Convert the hex memory write contents to bytes. 3572 StreamGDBRemote response; 3573 const uint64_t convert_count = static_cast<uint64_t> (packet.GetHexBytes (&buf[0], byte_count, 0)); 3574 if (convert_count != byte_count) 3575 { 3576 if (log) 3577 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": asked to write %" PRIu64 " bytes, but only found %" PRIu64 " to convert.", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, byte_count, convert_count); 3578 return SendIllFormedResponse (packet, "M content byte length specified did not match hex-encoded content length"); 3579 } 3580 3581 // Write the process memory. 3582 lldb::addr_t bytes_written = 0; 3583 lldb_private::Error error = m_debugged_process_sp->WriteMemory (write_addr, &buf[0], byte_count, bytes_written); 3584 if (error.Fail ()) 3585 { 3586 if (log) 3587 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to write. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, error.AsCString ()); 3588 return SendErrorResponse (0x09); 3589 } 3590 3591 if (bytes_written == 0) 3592 { 3593 if (log) 3594 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": wrote %" PRIu64 " of %" PRIu64 " requested bytes", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, bytes_written, byte_count); 3595 return SendErrorResponse (0x09); 3596 } 3597 3598 return SendOKResponse (); 3599 } 3600 3601 GDBRemoteCommunicationServer::PacketResult 3602 GDBRemoteCommunicationServer::Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet) 3603 { 3604 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3605 3606 // We don't support if we're not llgs. 3607 if (!IsGdbServer()) 3608 return SendUnimplementedResponse (""); 3609 3610 // Currently only the NativeProcessProtocol knows if it can handle a qMemoryRegionInfoSupported 3611 // request, but we're not guaranteed to be attached to a process. For now we'll assume the 3612 // client only asks this when a process is being debugged. 3613 3614 // Ensure we have a process running; otherwise, we can't figure this out 3615 // since we won't have a NativeProcessProtocol. 3616 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3617 { 3618 if (log) 3619 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3620 return SendErrorResponse (0x15); 3621 } 3622 3623 // Test if we can get any region back when asking for the region around NULL. 3624 MemoryRegionInfo region_info; 3625 const Error error = m_debugged_process_sp->GetMemoryRegionInfo (0, region_info); 3626 if (error.Fail ()) 3627 { 3628 // We don't support memory region info collection for this NativeProcessProtocol. 3629 return SendUnimplementedResponse (""); 3630 } 3631 3632 return SendOKResponse(); 3633 } 3634 3635 GDBRemoteCommunicationServer::PacketResult 3636 GDBRemoteCommunicationServer::Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet) 3637 { 3638 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3639 3640 // We don't support if we're not llgs. 3641 if (!IsGdbServer()) 3642 return SendUnimplementedResponse (""); 3643 3644 // Ensure we have a process. 3645 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3646 { 3647 if (log) 3648 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3649 return SendErrorResponse (0x15); 3650 } 3651 3652 // Parse out the memory address. 3653 packet.SetFilePos (strlen("qMemoryRegionInfo:")); 3654 if (packet.GetBytesLeft() < 1) 3655 return SendIllFormedResponse(packet, "Too short qMemoryRegionInfo: packet"); 3656 3657 // Read the address. Punting on validation. 3658 const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); 3659 3660 StreamGDBRemote response; 3661 3662 // Get the memory region info for the target address. 3663 MemoryRegionInfo region_info; 3664 const Error error = m_debugged_process_sp->GetMemoryRegionInfo (read_addr, region_info); 3665 if (error.Fail ()) 3666 { 3667 // Return the error message. 3668 3669 response.PutCString ("error:"); 3670 response.PutCStringAsRawHex8 (error.AsCString ()); 3671 response.PutChar (';'); 3672 } 3673 else 3674 { 3675 // Range start and size. 3676 response.Printf ("start:%" PRIx64 ";size:%" PRIx64 ";", region_info.GetRange ().GetRangeBase (), region_info.GetRange ().GetByteSize ()); 3677 3678 // Permissions. 3679 if (region_info.GetReadable () || 3680 region_info.GetWritable () || 3681 region_info.GetExecutable ()) 3682 { 3683 // Write permissions info. 3684 response.PutCString ("permissions:"); 3685 3686 if (region_info.GetReadable ()) 3687 response.PutChar ('r'); 3688 if (region_info.GetWritable ()) 3689 response.PutChar('w'); 3690 if (region_info.GetExecutable()) 3691 response.PutChar ('x'); 3692 3693 response.PutChar (';'); 3694 } 3695 } 3696 3697 return SendPacketNoLock(response.GetData(), response.GetSize()); 3698 } 3699 3700 GDBRemoteCommunicationServer::PacketResult 3701 GDBRemoteCommunicationServer::Handle_Z (StringExtractorGDBRemote &packet) 3702 { 3703 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); 3704 3705 // We don't support if we're not llgs. 3706 if (!IsGdbServer()) 3707 return SendUnimplementedResponse (""); 3708 3709 // Ensure we have a process. 3710 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3711 { 3712 if (log) 3713 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3714 return SendErrorResponse (0x15); 3715 } 3716 3717 // Parse out software or hardware breakpoint requested. 3718 packet.SetFilePos (strlen("Z")); 3719 if (packet.GetBytesLeft() < 1) 3720 return SendIllFormedResponse(packet, "Too short Z packet, missing software/hardware specifier"); 3721 3722 bool want_breakpoint = true; 3723 bool want_hardware = false; 3724 3725 const char breakpoint_type_char = packet.GetChar (); 3726 switch (breakpoint_type_char) 3727 { 3728 case '0': want_hardware = false; want_breakpoint = true; break; 3729 case '1': want_hardware = true; want_breakpoint = true; break; 3730 case '2': want_breakpoint = false; break; 3731 case '3': want_breakpoint = false; break; 3732 default: 3733 return SendIllFormedResponse(packet, "Z packet had invalid software/hardware specifier"); 3734 3735 } 3736 3737 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3738 return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after breakpoint type"); 3739 3740 // FIXME implement watchpoint support. 3741 if (!want_breakpoint) 3742 return SendUnimplementedResponse ("watchpoint support not yet implemented"); 3743 3744 // Parse out the breakpoint address. 3745 if (packet.GetBytesLeft() < 1) 3746 return SendIllFormedResponse(packet, "Too short Z packet, missing address"); 3747 const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0); 3748 3749 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3750 return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after address"); 3751 3752 // Parse out the breakpoint kind (i.e. size hint for opcode size). 3753 const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3754 if (kind == std::numeric_limits<uint32_t>::max ()) 3755 return SendIllFormedResponse(packet, "Malformed Z packet, failed to parse kind argument"); 3756 3757 if (want_breakpoint) 3758 { 3759 // Try to set the breakpoint. 3760 const Error error = m_debugged_process_sp->SetBreakpoint (breakpoint_addr, kind, want_hardware); 3761 if (error.Success ()) 3762 return SendOKResponse (); 3763 else 3764 { 3765 if (log) 3766 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to set breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 3767 return SendErrorResponse (0x09); 3768 } 3769 } 3770 3771 // FIXME fix up after watchpoints are handled. 3772 return SendUnimplementedResponse (""); 3773 } 3774 3775 GDBRemoteCommunicationServer::PacketResult 3776 GDBRemoteCommunicationServer::Handle_z (StringExtractorGDBRemote &packet) 3777 { 3778 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); 3779 3780 // We don't support if we're not llgs. 3781 if (!IsGdbServer()) 3782 return SendUnimplementedResponse (""); 3783 3784 // Ensure we have a process. 3785 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3786 { 3787 if (log) 3788 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3789 return SendErrorResponse (0x15); 3790 } 3791 3792 // Parse out software or hardware breakpoint requested. 3793 packet.SetFilePos (strlen("z")); 3794 if (packet.GetBytesLeft() < 1) 3795 return SendIllFormedResponse(packet, "Too short z packet, missing software/hardware specifier"); 3796 3797 bool want_breakpoint = true; 3798 3799 const char breakpoint_type_char = packet.GetChar (); 3800 switch (breakpoint_type_char) 3801 { 3802 case '0': want_breakpoint = true; break; 3803 case '1': want_breakpoint = true; break; 3804 case '2': want_breakpoint = false; break; 3805 case '3': want_breakpoint = false; break; 3806 default: 3807 return SendIllFormedResponse(packet, "z packet had invalid software/hardware specifier"); 3808 3809 } 3810 3811 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3812 return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after breakpoint type"); 3813 3814 // FIXME implement watchpoint support. 3815 if (!want_breakpoint) 3816 return SendUnimplementedResponse ("watchpoint support not yet implemented"); 3817 3818 // Parse out the breakpoint address. 3819 if (packet.GetBytesLeft() < 1) 3820 return SendIllFormedResponse(packet, "Too short z packet, missing address"); 3821 const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0); 3822 3823 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3824 return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after address"); 3825 3826 // Parse out the breakpoint kind (i.e. size hint for opcode size). 3827 const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3828 if (kind == std::numeric_limits<uint32_t>::max ()) 3829 return SendIllFormedResponse(packet, "Malformed z packet, failed to parse kind argument"); 3830 3831 if (want_breakpoint) 3832 { 3833 // Try to clear the breakpoint. 3834 const Error error = m_debugged_process_sp->RemoveBreakpoint (breakpoint_addr); 3835 if (error.Success ()) 3836 return SendOKResponse (); 3837 else 3838 { 3839 if (log) 3840 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to remove breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 3841 return SendErrorResponse (0x09); 3842 } 3843 } 3844 3845 // FIXME fix up after watchpoints are handled. 3846 return SendUnimplementedResponse (""); 3847 } 3848 3849 GDBRemoteCommunicationServer::PacketResult 3850 GDBRemoteCommunicationServer::Handle_s (StringExtractorGDBRemote &packet) 3851 { 3852 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 3853 3854 // We don't support if we're not llgs. 3855 if (!IsGdbServer()) 3856 return SendUnimplementedResponse (""); 3857 3858 // Ensure we have a process. 3859 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3860 { 3861 if (log) 3862 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3863 return SendErrorResponse (0x32); 3864 } 3865 3866 // We first try to use a continue thread id. If any one or any all set, use the current thread. 3867 // Bail out if we don't have a thread id. 3868 lldb::tid_t tid = GetContinueThreadID (); 3869 if (tid == 0 || tid == LLDB_INVALID_THREAD_ID) 3870 tid = GetCurrentThreadID (); 3871 if (tid == LLDB_INVALID_THREAD_ID) 3872 return SendErrorResponse (0x33); 3873 3874 // Double check that we have such a thread. 3875 // TODO investigate: on MacOSX we might need to do an UpdateThreads () here. 3876 NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetThreadByID (tid); 3877 if (!thread_sp || thread_sp->GetID () != tid) 3878 return SendErrorResponse (0x33); 3879 3880 // Create the step action for the given thread. 3881 lldb_private::ResumeAction action = { tid, eStateStepping, 0 }; 3882 3883 // Setup the actions list. 3884 lldb_private::ResumeActionList actions; 3885 actions.Append (action); 3886 3887 // All other threads stop while we're single stepping a thread. 3888 actions.SetDefaultThreadActionIfNeeded(eStateStopped, 0); 3889 Error error = m_debugged_process_sp->Resume (actions); 3890 if (error.Fail ()) 3891 { 3892 if (log) 3893 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " Resume() failed with error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), tid, error.AsCString ()); 3894 return SendErrorResponse(0x49); 3895 } 3896 3897 // No response here - the stop or exit will come from the resulting action. 3898 return PacketResult::Success; 3899 } 3900 3901 GDBRemoteCommunicationServer::PacketResult 3902 GDBRemoteCommunicationServer::Handle_qSupported (StringExtractorGDBRemote &packet) 3903 { 3904 StreamGDBRemote response; 3905 3906 // Features common to lldb-platform and llgs. 3907 uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet size--debugger can always use less 3908 response.Printf ("PacketSize=%x", max_packet_size); 3909 3910 response.PutCString (";QStartNoAckMode+"); 3911 response.PutCString (";QThreadSuffixSupported+"); 3912 response.PutCString (";QListThreadsInStopReply+"); 3913 #if defined(__linux__) 3914 response.PutCString (";qXfer:auxv:read+"); 3915 #endif 3916 3917 return SendPacketNoLock(response.GetData(), response.GetSize()); 3918 } 3919 3920 GDBRemoteCommunicationServer::PacketResult 3921 GDBRemoteCommunicationServer::Handle_QThreadSuffixSupported (StringExtractorGDBRemote &packet) 3922 { 3923 m_thread_suffix_supported = true; 3924 return SendOKResponse(); 3925 } 3926 3927 GDBRemoteCommunicationServer::PacketResult 3928 GDBRemoteCommunicationServer::Handle_QListThreadsInStopReply (StringExtractorGDBRemote &packet) 3929 { 3930 m_list_threads_in_stop_reply = true; 3931 return SendOKResponse(); 3932 } 3933 3934 GDBRemoteCommunicationServer::PacketResult 3935 GDBRemoteCommunicationServer::Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet) 3936 { 3937 // We don't support if we're not llgs. 3938 if (!IsGdbServer()) 3939 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 3940 3941 // *BSD impls should be able to do this too. 3942 #if defined(__linux__) 3943 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3944 3945 // Parse out the offset. 3946 packet.SetFilePos (strlen("qXfer:auxv:read::")); 3947 if (packet.GetBytesLeft () < 1) 3948 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); 3949 3950 const uint64_t auxv_offset = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ()); 3951 if (auxv_offset == std::numeric_limits<uint64_t>::max ()) 3952 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); 3953 3954 // Parse out comma. 3955 if (packet.GetBytesLeft () < 1 || packet.GetChar () != ',') 3956 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing comma after offset"); 3957 3958 // Parse out the length. 3959 const uint64_t auxv_length = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ()); 3960 if (auxv_length == std::numeric_limits<uint64_t>::max ()) 3961 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing length"); 3962 3963 // Grab the auxv data if we need it. 3964 if (!m_active_auxv_buffer_sp) 3965 { 3966 // Make sure we have a valid process. 3967 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3968 { 3969 if (log) 3970 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3971 return SendErrorResponse (0x10); 3972 } 3973 3974 // Grab the auxv data. 3975 m_active_auxv_buffer_sp = Host::GetAuxvData (m_debugged_process_sp->GetID ()); 3976 if (!m_active_auxv_buffer_sp || m_active_auxv_buffer_sp->GetByteSize () == 0) 3977 { 3978 // Hmm, no auxv data, call that an error. 3979 if (log) 3980 log->Printf ("GDBRemoteCommunicationServer::%s failed, no auxv data retrieved", __FUNCTION__); 3981 m_active_auxv_buffer_sp.reset (); 3982 return SendErrorResponse (0x11); 3983 } 3984 } 3985 3986 // FIXME find out if/how I lock the stream here. 3987 3988 StreamGDBRemote response; 3989 bool done_with_buffer = false; 3990 3991 if (auxv_offset >= m_active_auxv_buffer_sp->GetByteSize ()) 3992 { 3993 // We have nothing left to send. Mark the buffer as complete. 3994 response.PutChar ('l'); 3995 done_with_buffer = true; 3996 } 3997 else 3998 { 3999 // Figure out how many bytes are available starting at the given offset. 4000 const uint64_t bytes_remaining = m_active_auxv_buffer_sp->GetByteSize () - auxv_offset; 4001 4002 // Figure out how many bytes we're going to read. 4003 const uint64_t bytes_to_read = (auxv_length > bytes_remaining) ? bytes_remaining : auxv_length; 4004 4005 // Mark the response type according to whether we're reading the remainder of the auxv data. 4006 if (bytes_to_read >= bytes_remaining) 4007 { 4008 // There will be nothing left to read after this 4009 response.PutChar ('l'); 4010 done_with_buffer = true; 4011 } 4012 else 4013 { 4014 // There will still be bytes to read after this request. 4015 response.PutChar ('m'); 4016 } 4017 4018 // Now write the data in encoded binary form. 4019 response.PutEscapedBytes (m_active_auxv_buffer_sp->GetBytes () + auxv_offset, bytes_to_read); 4020 } 4021 4022 if (done_with_buffer) 4023 m_active_auxv_buffer_sp.reset (); 4024 4025 return SendPacketNoLock(response.GetData(), response.GetSize()); 4026 #else 4027 return SendUnimplementedResponse ("not implemented on this platform"); 4028 #endif 4029 } 4030 4031 GDBRemoteCommunicationServer::PacketResult 4032 GDBRemoteCommunicationServer::Handle_QSaveRegisterState (StringExtractorGDBRemote &packet) 4033 { 4034 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4035 4036 // We don't support if we're not llgs. 4037 if (!IsGdbServer()) 4038 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4039 4040 // Move past packet name. 4041 packet.SetFilePos (strlen ("QSaveRegisterState")); 4042 4043 // Get the thread to use. 4044 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 4045 if (!thread_sp) 4046 { 4047 if (m_thread_suffix_supported) 4048 return SendIllFormedResponse (packet, "No thread specified in QSaveRegisterState packet"); 4049 else 4050 return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); 4051 } 4052 4053 // Grab the register context for the thread. 4054 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 4055 if (!reg_context_sp) 4056 { 4057 if (log) 4058 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); 4059 return SendErrorResponse (0x15); 4060 } 4061 4062 // Save registers to a buffer. 4063 DataBufferSP register_data_sp; 4064 Error error = reg_context_sp->ReadAllRegisterValues (register_data_sp); 4065 if (error.Fail ()) 4066 { 4067 if (log) 4068 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to save all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4069 return SendErrorResponse (0x75); 4070 } 4071 4072 // Allocate a new save id. 4073 const uint32_t save_id = GetNextSavedRegistersID (); 4074 assert ((m_saved_registers_map.find (save_id) == m_saved_registers_map.end ()) && "GetNextRegisterSaveID() returned an existing register save id"); 4075 4076 // Save the register data buffer under the save id. 4077 { 4078 Mutex::Locker locker (m_saved_registers_mutex); 4079 m_saved_registers_map[save_id] = register_data_sp; 4080 } 4081 4082 // Write the response. 4083 StreamGDBRemote response; 4084 response.Printf ("%" PRIu32, save_id); 4085 return SendPacketNoLock(response.GetData(), response.GetSize()); 4086 } 4087 4088 GDBRemoteCommunicationServer::PacketResult 4089 GDBRemoteCommunicationServer::Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet) 4090 { 4091 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4092 4093 // We don't support if we're not llgs. 4094 if (!IsGdbServer()) 4095 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4096 4097 // Parse out save id. 4098 packet.SetFilePos (strlen ("QRestoreRegisterState:")); 4099 if (packet.GetBytesLeft () < 1) 4100 return SendIllFormedResponse (packet, "QRestoreRegisterState packet missing register save id"); 4101 4102 const uint32_t save_id = packet.GetU32 (0); 4103 if (save_id == 0) 4104 { 4105 if (log) 4106 log->Printf ("GDBRemoteCommunicationServer::%s QRestoreRegisterState packet has malformed save id, expecting decimal uint32_t", __FUNCTION__); 4107 return SendErrorResponse (0x76); 4108 } 4109 4110 // Get the thread to use. 4111 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 4112 if (!thread_sp) 4113 { 4114 if (m_thread_suffix_supported) 4115 return SendIllFormedResponse (packet, "No thread specified in QRestoreRegisterState packet"); 4116 else 4117 return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); 4118 } 4119 4120 // Grab the register context for the thread. 4121 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 4122 if (!reg_context_sp) 4123 { 4124 if (log) 4125 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); 4126 return SendErrorResponse (0x15); 4127 } 4128 4129 // Retrieve register state buffer, then remove from the list. 4130 DataBufferSP register_data_sp; 4131 { 4132 Mutex::Locker locker (m_saved_registers_mutex); 4133 4134 // Find the register set buffer for the given save id. 4135 auto it = m_saved_registers_map.find (save_id); 4136 if (it == m_saved_registers_map.end ()) 4137 { 4138 if (log) 4139 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " does not have a register set save buffer for id %" PRIu32, __FUNCTION__, m_debugged_process_sp->GetID (), save_id); 4140 return SendErrorResponse (0x77); 4141 } 4142 register_data_sp = it->second; 4143 4144 // Remove it from the map. 4145 m_saved_registers_map.erase (it); 4146 } 4147 4148 Error error = reg_context_sp->WriteAllRegisterValues (register_data_sp); 4149 if (error.Fail ()) 4150 { 4151 if (log) 4152 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to restore all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4153 return SendErrorResponse (0x77); 4154 } 4155 4156 return SendOKResponse(); 4157 } 4158 4159 GDBRemoteCommunicationServer::PacketResult 4160 GDBRemoteCommunicationServer::Handle_vAttach (StringExtractorGDBRemote &packet) 4161 { 4162 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4163 4164 // We don't support if we're not llgs. 4165 if (!IsGdbServer()) 4166 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4167 4168 // Consume the ';' after vAttach. 4169 packet.SetFilePos (strlen ("vAttach")); 4170 if (!packet.GetBytesLeft () || packet.GetChar () != ';') 4171 return SendIllFormedResponse (packet, "vAttach missing expected ';'"); 4172 4173 // Grab the PID to which we will attach (assume hex encoding). 4174 lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16); 4175 if (pid == LLDB_INVALID_PROCESS_ID) 4176 return SendIllFormedResponse (packet, "vAttach failed to parse the process id"); 4177 4178 // Attempt to attach. 4179 if (log) 4180 log->Printf ("GDBRemoteCommunicationServer::%s attempting to attach to pid %" PRIu64, __FUNCTION__, pid); 4181 4182 Error error = AttachToProcess (pid); 4183 4184 if (error.Fail ()) 4185 { 4186 if (log) 4187 log->Printf ("GDBRemoteCommunicationServer::%s failed to attach to pid %" PRIu64 ": %s\n", __FUNCTION__, pid, error.AsCString()); 4188 return SendErrorResponse (0x01); 4189 } 4190 4191 // Notify we attached by sending a stop packet. 4192 return SendStopReasonForState (m_debugged_process_sp->GetState (), true); 4193 4194 return PacketResult::Success; 4195 } 4196 4197 GDBRemoteCommunicationServer::PacketResult 4198 GDBRemoteCommunicationServer::Handle_qThreadStopInfo (StringExtractorGDBRemote &packet) 4199 { 4200 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4201 4202 // We don't support if we're not llgs. 4203 if (!IsGdbServer()) 4204 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4205 4206 packet.SetFilePos (strlen("qThreadStopInfo")); 4207 const lldb::tid_t tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); 4208 if (tid == LLDB_INVALID_THREAD_ID) 4209 { 4210 if (log) 4211 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse thread id from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 4212 return SendErrorResponse (0x15); 4213 } 4214 return SendStopReplyPacketForThread (tid); 4215 } 4216 4217 void 4218 GDBRemoteCommunicationServer::FlushInferiorOutput () 4219 { 4220 // If we're not monitoring an inferior's terminal, ignore this. 4221 if (!m_stdio_communication.IsConnected()) 4222 return; 4223 4224 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 4225 if (log) 4226 log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); 4227 4228 // FIXME implement a timeout on the join. 4229 m_stdio_communication.JoinReadThread(); 4230 } 4231 4232 void 4233 GDBRemoteCommunicationServer::MaybeCloseInferiorTerminalConnection () 4234 { 4235 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4236 4237 // Tell the stdio connection to shut down. 4238 if (m_stdio_communication.IsConnected()) 4239 { 4240 auto connection = m_stdio_communication.GetConnection(); 4241 if (connection) 4242 { 4243 Error error; 4244 connection->Disconnect (&error); 4245 4246 if (error.Success ()) 4247 { 4248 if (log) 4249 log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - SUCCESS", __FUNCTION__); 4250 } 4251 else 4252 { 4253 if (log) 4254 log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - FAIL: %s", __FUNCTION__, error.AsCString ()); 4255 } 4256 } 4257 } 4258 } 4259 4260 4261 lldb_private::NativeThreadProtocolSP 4262 GDBRemoteCommunicationServer::GetThreadFromSuffix (StringExtractorGDBRemote &packet) 4263 { 4264 NativeThreadProtocolSP thread_sp; 4265 4266 // We have no thread if we don't have a process. 4267 if (!m_debugged_process_sp || m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID) 4268 return thread_sp; 4269 4270 // If the client hasn't asked for thread suffix support, there will not be a thread suffix. 4271 // Use the current thread in that case. 4272 if (!m_thread_suffix_supported) 4273 { 4274 const lldb::tid_t current_tid = GetCurrentThreadID (); 4275 if (current_tid == LLDB_INVALID_THREAD_ID) 4276 return thread_sp; 4277 else if (current_tid == 0) 4278 { 4279 // Pick a thread. 4280 return m_debugged_process_sp->GetThreadAtIndex (0); 4281 } 4282 else 4283 return m_debugged_process_sp->GetThreadByID (current_tid); 4284 } 4285 4286 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4287 4288 // Parse out the ';'. 4289 if (packet.GetBytesLeft () < 1 || packet.GetChar () != ';') 4290 { 4291 if (log) 4292 log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected ';' prior to start of thread suffix: packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); 4293 return thread_sp; 4294 } 4295 4296 if (!packet.GetBytesLeft ()) 4297 return thread_sp; 4298 4299 // Parse out thread: portion. 4300 if (strncmp (packet.Peek (), "thread:", strlen("thread:")) != 0) 4301 { 4302 if (log) 4303 log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected 'thread:' but not found, packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); 4304 return thread_sp; 4305 } 4306 packet.SetFilePos (packet.GetFilePos () + strlen("thread:")); 4307 const lldb::tid_t tid = packet.GetHexMaxU64(false, 0); 4308 if (tid != 0) 4309 return m_debugged_process_sp->GetThreadByID (tid); 4310 4311 return thread_sp; 4312 } 4313 4314 lldb::tid_t 4315 GDBRemoteCommunicationServer::GetCurrentThreadID () const 4316 { 4317 if (m_current_tid == 0 || m_current_tid == LLDB_INVALID_THREAD_ID) 4318 { 4319 // Use whatever the debug process says is the current thread id 4320 // since the protocol either didn't specify or specified we want 4321 // any/all threads marked as the current thread. 4322 if (!m_debugged_process_sp) 4323 return LLDB_INVALID_THREAD_ID; 4324 return m_debugged_process_sp->GetCurrentThreadID (); 4325 } 4326 // Use the specific current thread id set by the gdb remote protocol. 4327 return m_current_tid; 4328 } 4329 4330 uint32_t 4331 GDBRemoteCommunicationServer::GetNextSavedRegistersID () 4332 { 4333 Mutex::Locker locker (m_saved_registers_mutex); 4334 return m_next_saved_registers_id++; 4335 } 4336 4337 void 4338 GDBRemoteCommunicationServer::ClearProcessSpecificData () 4339 { 4340 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|GDBR_LOG_PROCESS)); 4341 if (log) 4342 log->Printf ("GDBRemoteCommunicationServer::%s()", __FUNCTION__); 4343 4344 // Clear any auxv cached data. 4345 // *BSD impls should be able to do this too. 4346 #if defined(__linux__) 4347 if (log) 4348 log->Printf ("GDBRemoteCommunicationServer::%s clearing auxv buffer (previously %s)", 4349 __FUNCTION__, 4350 m_active_auxv_buffer_sp ? "was set" : "was not set"); 4351 m_active_auxv_buffer_sp.reset (); 4352 #endif 4353 } 4354