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/StringConvert.h" 38 #include "lldb/Host/TimeValue.h" 39 #include "lldb/Target/FileAction.h" 40 #include "lldb/Target/Platform.h" 41 #include "lldb/Target/Process.h" 42 #include "lldb/Target/NativeRegisterContext.h" 43 #include "Host/common/NativeProcessProtocol.h" 44 #include "Host/common/NativeThreadProtocol.h" 45 46 // Project includes 47 #include "Utility/StringExtractorGDBRemote.h" 48 #include "Utility/UriParser.h" 49 #include "ProcessGDBRemote.h" 50 #include "ProcessGDBRemoteLog.h" 51 52 using namespace lldb; 53 using namespace lldb_private; 54 55 //---------------------------------------------------------------------- 56 // GDBRemote Errors 57 //---------------------------------------------------------------------- 58 59 namespace 60 { 61 enum GDBRemoteServerError 62 { 63 // Set to the first unused error number in literal form below 64 eErrorFirst = 29, 65 eErrorNoProcess = eErrorFirst, 66 eErrorResume, 67 eErrorExitStatus 68 }; 69 } 70 71 //---------------------------------------------------------------------- 72 // GDBRemoteCommunicationServer constructor 73 //---------------------------------------------------------------------- 74 GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform) : 75 GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), 76 m_platform_sp (Platform::GetHostPlatform ()), 77 m_async_thread (LLDB_INVALID_HOST_THREAD), 78 m_process_launch_info (), 79 m_process_launch_error (), 80 m_spawned_pids (), 81 m_spawned_pids_mutex (Mutex::eMutexTypeRecursive), 82 m_proc_infos (), 83 m_proc_infos_index (0), 84 m_port_map (), 85 m_port_offset(0), 86 m_current_tid (LLDB_INVALID_THREAD_ID), 87 m_continue_tid (LLDB_INVALID_THREAD_ID), 88 m_debugged_process_mutex (Mutex::eMutexTypeRecursive), 89 m_debugged_process_sp (), 90 m_debugger_sp (), 91 m_stdio_communication ("process.stdio"), 92 m_exit_now (false), 93 m_inferior_prev_state (StateType::eStateInvalid), 94 m_thread_suffix_supported (false), 95 m_list_threads_in_stop_reply (false), 96 m_active_auxv_buffer_sp (), 97 m_saved_registers_mutex (), 98 m_saved_registers_map (), 99 m_next_saved_registers_id (1) 100 { 101 assert(is_platform && "must be lldb-platform if debugger is not specified"); 102 } 103 104 GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(bool is_platform, 105 const lldb::PlatformSP& platform_sp, 106 lldb::DebuggerSP &debugger_sp) : 107 GDBRemoteCommunication ("gdb-remote.server", "gdb-remote.server.rx_packet", is_platform), 108 m_platform_sp (platform_sp), 109 m_async_thread (LLDB_INVALID_HOST_THREAD), 110 m_process_launch_info (), 111 m_process_launch_error (), 112 m_spawned_pids (), 113 m_spawned_pids_mutex (Mutex::eMutexTypeRecursive), 114 m_proc_infos (), 115 m_proc_infos_index (0), 116 m_port_map (), 117 m_port_offset(0), 118 m_current_tid (LLDB_INVALID_THREAD_ID), 119 m_continue_tid (LLDB_INVALID_THREAD_ID), 120 m_debugged_process_mutex (Mutex::eMutexTypeRecursive), 121 m_debugged_process_sp (), 122 m_debugger_sp (debugger_sp), 123 m_stdio_communication ("process.stdio"), 124 m_exit_now (false), 125 m_inferior_prev_state (StateType::eStateInvalid), 126 m_thread_suffix_supported (false), 127 m_list_threads_in_stop_reply (false), 128 m_active_auxv_buffer_sp (), 129 m_saved_registers_mutex (), 130 m_saved_registers_map (), 131 m_next_saved_registers_id (1) 132 { 133 assert(platform_sp); 134 assert((is_platform || debugger_sp) && "must specify non-NULL debugger_sp when lldb-gdbserver"); 135 } 136 137 //---------------------------------------------------------------------- 138 // Destructor 139 //---------------------------------------------------------------------- 140 GDBRemoteCommunicationServer::~GDBRemoteCommunicationServer() 141 { 142 } 143 144 GDBRemoteCommunication::PacketResult 145 GDBRemoteCommunicationServer::GetPacketAndSendResponse (uint32_t timeout_usec, 146 Error &error, 147 bool &interrupt, 148 bool &quit) 149 { 150 StringExtractorGDBRemote packet; 151 152 PacketResult packet_result = WaitForPacketWithTimeoutMicroSecondsNoLock (packet, timeout_usec); 153 if (packet_result == PacketResult::Success) 154 { 155 const StringExtractorGDBRemote::ServerPacketType packet_type = packet.GetServerPacketType (); 156 switch (packet_type) 157 { 158 case StringExtractorGDBRemote::eServerPacketType_nack: 159 case StringExtractorGDBRemote::eServerPacketType_ack: 160 break; 161 162 case StringExtractorGDBRemote::eServerPacketType_invalid: 163 error.SetErrorString("invalid packet"); 164 quit = true; 165 break; 166 167 default: 168 case StringExtractorGDBRemote::eServerPacketType_unimplemented: 169 packet_result = SendUnimplementedResponse (packet.GetStringRef().c_str()); 170 break; 171 172 case StringExtractorGDBRemote::eServerPacketType_A: 173 packet_result = Handle_A (packet); 174 break; 175 176 case StringExtractorGDBRemote::eServerPacketType_qfProcessInfo: 177 packet_result = Handle_qfProcessInfo (packet); 178 break; 179 180 case StringExtractorGDBRemote::eServerPacketType_qsProcessInfo: 181 packet_result = Handle_qsProcessInfo (packet); 182 break; 183 184 case StringExtractorGDBRemote::eServerPacketType_qC: 185 packet_result = Handle_qC (packet); 186 break; 187 188 case StringExtractorGDBRemote::eServerPacketType_qHostInfo: 189 packet_result = Handle_qHostInfo (packet); 190 break; 191 192 case StringExtractorGDBRemote::eServerPacketType_qLaunchGDBServer: 193 packet_result = Handle_qLaunchGDBServer (packet); 194 break; 195 196 case StringExtractorGDBRemote::eServerPacketType_qKillSpawnedProcess: 197 packet_result = Handle_qKillSpawnedProcess (packet); 198 break; 199 200 case StringExtractorGDBRemote::eServerPacketType_k: 201 packet_result = Handle_k (packet); 202 quit = true; 203 break; 204 205 case StringExtractorGDBRemote::eServerPacketType_qLaunchSuccess: 206 packet_result = Handle_qLaunchSuccess (packet); 207 break; 208 209 case StringExtractorGDBRemote::eServerPacketType_qGroupName: 210 packet_result = Handle_qGroupName (packet); 211 break; 212 213 case StringExtractorGDBRemote::eServerPacketType_qProcessInfo: 214 packet_result = Handle_qProcessInfo (packet); 215 break; 216 217 case StringExtractorGDBRemote::eServerPacketType_qProcessInfoPID: 218 packet_result = Handle_qProcessInfoPID (packet); 219 break; 220 221 case StringExtractorGDBRemote::eServerPacketType_qSpeedTest: 222 packet_result = Handle_qSpeedTest (packet); 223 break; 224 225 case StringExtractorGDBRemote::eServerPacketType_qUserName: 226 packet_result = Handle_qUserName (packet); 227 break; 228 229 case StringExtractorGDBRemote::eServerPacketType_qGetWorkingDir: 230 packet_result = Handle_qGetWorkingDir(packet); 231 break; 232 233 case StringExtractorGDBRemote::eServerPacketType_QEnvironment: 234 packet_result = Handle_QEnvironment (packet); 235 break; 236 237 case StringExtractorGDBRemote::eServerPacketType_QLaunchArch: 238 packet_result = Handle_QLaunchArch (packet); 239 break; 240 241 case StringExtractorGDBRemote::eServerPacketType_QSetDisableASLR: 242 packet_result = Handle_QSetDisableASLR (packet); 243 break; 244 245 case StringExtractorGDBRemote::eServerPacketType_QSetDetachOnError: 246 packet_result = Handle_QSetDetachOnError (packet); 247 break; 248 249 case StringExtractorGDBRemote::eServerPacketType_QSetSTDIN: 250 packet_result = Handle_QSetSTDIN (packet); 251 break; 252 253 case StringExtractorGDBRemote::eServerPacketType_QSetSTDOUT: 254 packet_result = Handle_QSetSTDOUT (packet); 255 break; 256 257 case StringExtractorGDBRemote::eServerPacketType_QSetSTDERR: 258 packet_result = Handle_QSetSTDERR (packet); 259 break; 260 261 case StringExtractorGDBRemote::eServerPacketType_QSetWorkingDir: 262 packet_result = Handle_QSetWorkingDir (packet); 263 break; 264 265 case StringExtractorGDBRemote::eServerPacketType_QStartNoAckMode: 266 packet_result = Handle_QStartNoAckMode (packet); 267 break; 268 269 case StringExtractorGDBRemote::eServerPacketType_qPlatform_mkdir: 270 packet_result = Handle_qPlatform_mkdir (packet); 271 break; 272 273 case StringExtractorGDBRemote::eServerPacketType_qPlatform_chmod: 274 packet_result = Handle_qPlatform_chmod (packet); 275 break; 276 277 case StringExtractorGDBRemote::eServerPacketType_qPlatform_shell: 278 packet_result = Handle_qPlatform_shell (packet); 279 break; 280 281 case StringExtractorGDBRemote::eServerPacketType_C: 282 packet_result = Handle_C (packet); 283 break; 284 285 case StringExtractorGDBRemote::eServerPacketType_c: 286 packet_result = Handle_c (packet); 287 break; 288 289 case StringExtractorGDBRemote::eServerPacketType_vCont: 290 packet_result = Handle_vCont (packet); 291 break; 292 293 case StringExtractorGDBRemote::eServerPacketType_vCont_actions: 294 packet_result = Handle_vCont_actions (packet); 295 break; 296 297 case StringExtractorGDBRemote::eServerPacketType_stop_reason: // ? 298 packet_result = Handle_stop_reason (packet); 299 break; 300 301 case StringExtractorGDBRemote::eServerPacketType_vFile_open: 302 packet_result = Handle_vFile_Open (packet); 303 break; 304 305 case StringExtractorGDBRemote::eServerPacketType_vFile_close: 306 packet_result = Handle_vFile_Close (packet); 307 break; 308 309 case StringExtractorGDBRemote::eServerPacketType_vFile_pread: 310 packet_result = Handle_vFile_pRead (packet); 311 break; 312 313 case StringExtractorGDBRemote::eServerPacketType_vFile_pwrite: 314 packet_result = Handle_vFile_pWrite (packet); 315 break; 316 317 case StringExtractorGDBRemote::eServerPacketType_vFile_size: 318 packet_result = Handle_vFile_Size (packet); 319 break; 320 321 case StringExtractorGDBRemote::eServerPacketType_vFile_mode: 322 packet_result = Handle_vFile_Mode (packet); 323 break; 324 325 case StringExtractorGDBRemote::eServerPacketType_vFile_exists: 326 packet_result = Handle_vFile_Exists (packet); 327 break; 328 329 case StringExtractorGDBRemote::eServerPacketType_vFile_stat: 330 packet_result = Handle_vFile_Stat (packet); 331 break; 332 333 case StringExtractorGDBRemote::eServerPacketType_vFile_md5: 334 packet_result = Handle_vFile_MD5 (packet); 335 break; 336 337 case StringExtractorGDBRemote::eServerPacketType_vFile_symlink: 338 packet_result = Handle_vFile_symlink (packet); 339 break; 340 341 case StringExtractorGDBRemote::eServerPacketType_vFile_unlink: 342 packet_result = Handle_vFile_unlink (packet); 343 break; 344 345 case StringExtractorGDBRemote::eServerPacketType_qRegisterInfo: 346 packet_result = Handle_qRegisterInfo (packet); 347 break; 348 349 case StringExtractorGDBRemote::eServerPacketType_qfThreadInfo: 350 packet_result = Handle_qfThreadInfo (packet); 351 break; 352 353 case StringExtractorGDBRemote::eServerPacketType_qsThreadInfo: 354 packet_result = Handle_qsThreadInfo (packet); 355 break; 356 357 case StringExtractorGDBRemote::eServerPacketType_p: 358 packet_result = Handle_p (packet); 359 break; 360 361 case StringExtractorGDBRemote::eServerPacketType_P: 362 packet_result = Handle_P (packet); 363 break; 364 365 case StringExtractorGDBRemote::eServerPacketType_H: 366 packet_result = Handle_H (packet); 367 break; 368 369 case StringExtractorGDBRemote::eServerPacketType_m: 370 packet_result = Handle_m (packet); 371 break; 372 373 case StringExtractorGDBRemote::eServerPacketType_M: 374 packet_result = Handle_M (packet); 375 break; 376 377 case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfoSupported: 378 packet_result = Handle_qMemoryRegionInfoSupported (packet); 379 break; 380 381 case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfo: 382 packet_result = Handle_qMemoryRegionInfo (packet); 383 break; 384 385 case StringExtractorGDBRemote::eServerPacketType_interrupt: 386 if (IsGdbServer ()) 387 packet_result = Handle_interrupt (packet); 388 else 389 { 390 error.SetErrorString("interrupt received"); 391 interrupt = true; 392 } 393 break; 394 395 case StringExtractorGDBRemote::eServerPacketType_Z: 396 packet_result = Handle_Z (packet); 397 break; 398 399 case StringExtractorGDBRemote::eServerPacketType_z: 400 packet_result = Handle_z (packet); 401 break; 402 403 case StringExtractorGDBRemote::eServerPacketType_s: 404 packet_result = Handle_s (packet); 405 break; 406 407 case StringExtractorGDBRemote::eServerPacketType_qSupported: 408 packet_result = Handle_qSupported (packet); 409 break; 410 411 case StringExtractorGDBRemote::eServerPacketType_QThreadSuffixSupported: 412 packet_result = Handle_QThreadSuffixSupported (packet); 413 break; 414 415 case StringExtractorGDBRemote::eServerPacketType_QListThreadsInStopReply: 416 packet_result = Handle_QListThreadsInStopReply (packet); 417 break; 418 419 case StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read: 420 packet_result = Handle_qXfer_auxv_read (packet); 421 break; 422 423 case StringExtractorGDBRemote::eServerPacketType_QSaveRegisterState: 424 packet_result = Handle_QSaveRegisterState (packet); 425 break; 426 427 case StringExtractorGDBRemote::eServerPacketType_QRestoreRegisterState: 428 packet_result = Handle_QRestoreRegisterState (packet); 429 break; 430 431 case StringExtractorGDBRemote::eServerPacketType_vAttach: 432 packet_result = Handle_vAttach (packet); 433 break; 434 435 case StringExtractorGDBRemote::eServerPacketType_D: 436 packet_result = Handle_D (packet); 437 break; 438 439 case StringExtractorGDBRemote::eServerPacketType_qThreadStopInfo: 440 packet_result = Handle_qThreadStopInfo (packet); 441 break; 442 } 443 } 444 else 445 { 446 if (!IsConnected()) 447 { 448 error.SetErrorString("lost connection"); 449 quit = true; 450 } 451 else 452 { 453 error.SetErrorString("timeout"); 454 } 455 } 456 457 // Check if anything occurred that would force us to want to exit. 458 if (m_exit_now) 459 quit = true; 460 461 return packet_result; 462 } 463 464 lldb_private::Error 465 GDBRemoteCommunicationServer::SetLaunchArguments (const char *const args[], int argc) 466 { 467 if ((argc < 1) || !args || !args[0] || !args[0][0]) 468 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 469 470 m_process_launch_info.SetArguments (const_cast<const char**> (args), true); 471 return lldb_private::Error (); 472 } 473 474 lldb_private::Error 475 GDBRemoteCommunicationServer::SetLaunchFlags (unsigned int launch_flags) 476 { 477 m_process_launch_info.GetFlags ().Set (launch_flags); 478 return lldb_private::Error (); 479 } 480 481 lldb_private::Error 482 GDBRemoteCommunicationServer::LaunchProcess () 483 { 484 // FIXME This looks an awful lot like we could override this in 485 // derived classes, one for lldb-platform, the other for lldb-gdbserver. 486 if (IsGdbServer ()) 487 return LaunchProcessForDebugging (); 488 else 489 return LaunchPlatformProcess (); 490 } 491 492 bool 493 GDBRemoteCommunicationServer::ShouldRedirectInferiorOutputOverGdbRemote (const lldb_private::ProcessLaunchInfo &launch_info) const 494 { 495 // Retrieve the file actions specified for stdout and stderr. 496 auto stdout_file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 497 auto stderr_file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 498 499 // If neither stdout and stderr file actions are specified, we're not doing anything special, so 500 // assume we want to redirect stdout/stderr over gdb-remote $O messages. 501 if ((stdout_file_action == nullptr) && (stderr_file_action == nullptr)) 502 { 503 // Send stdout/stderr over the gdb-remote protocol. 504 return true; 505 } 506 507 // Any other setting for either stdout or stderr implies we are either suppressing 508 // it (with /dev/null) or we've got it set to a PTY. Either way, we don't want the 509 // output over gdb-remote. 510 return false; 511 } 512 513 lldb_private::Error 514 GDBRemoteCommunicationServer::LaunchProcessForDebugging () 515 { 516 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 517 518 if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) 519 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 520 521 lldb_private::Error error; 522 { 523 Mutex::Locker locker (m_debugged_process_mutex); 524 assert (!m_debugged_process_sp && "lldb-gdbserver creating debugged process but one already exists"); 525 error = m_platform_sp->LaunchNativeProcess ( 526 m_process_launch_info, 527 *this, 528 m_debugged_process_sp); 529 } 530 531 if (!error.Success ()) 532 { 533 fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); 534 return error; 535 } 536 537 // Handle mirroring of inferior stdout/stderr over the gdb-remote protocol as needed. 538 // llgs local-process debugging may specify PTYs, which will eliminate the need to reflect inferior 539 // stdout/stderr over the gdb-remote protocol. 540 if (ShouldRedirectInferiorOutputOverGdbRemote (m_process_launch_info)) 541 { 542 if (log) 543 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " setting up stdout/stderr redirection via $O gdb-remote commands", __FUNCTION__, m_debugged_process_sp->GetID ()); 544 545 // Setup stdout/stderr mapping from inferior to $O 546 auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); 547 if (terminal_fd >= 0) 548 { 549 if (log) 550 log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); 551 error = SetSTDIOFileDescriptor (terminal_fd); 552 if (error.Fail ()) 553 return error; 554 } 555 else 556 { 557 if (log) 558 log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); 559 } 560 } 561 else 562 { 563 if (log) 564 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 ()); 565 } 566 567 printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID ()); 568 569 // Add to list of spawned processes. 570 lldb::pid_t pid; 571 if ((pid = m_process_launch_info.GetProcessID ()) != LLDB_INVALID_PROCESS_ID) 572 { 573 // add to spawned pids 574 Mutex::Locker locker (m_spawned_pids_mutex); 575 // On an lldb-gdbserver, we would expect there to be only one. 576 assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); 577 m_spawned_pids.insert (pid); 578 } 579 580 return error; 581 } 582 583 lldb_private::Error 584 GDBRemoteCommunicationServer::LaunchPlatformProcess () 585 { 586 if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) 587 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 588 589 // specify the process monitor if not already set. This should 590 // generally be what happens since we need to reap started 591 // processes. 592 if (!m_process_launch_info.GetMonitorProcessCallback ()) 593 m_process_launch_info.SetMonitorProcessCallback(ReapDebuggedProcess, this, false); 594 595 lldb_private::Error error = m_platform_sp->LaunchProcess (m_process_launch_info); 596 if (!error.Success ()) 597 { 598 fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); 599 return error; 600 } 601 602 printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID()); 603 604 // add to list of spawned processes. On an lldb-gdbserver, we 605 // would expect there to be only one. 606 lldb::pid_t pid; 607 if ( (pid = m_process_launch_info.GetProcessID()) != LLDB_INVALID_PROCESS_ID ) 608 { 609 // add to spawned pids 610 { 611 Mutex::Locker locker (m_spawned_pids_mutex); 612 m_spawned_pids.insert(pid); 613 } 614 } 615 616 return error; 617 } 618 619 lldb_private::Error 620 GDBRemoteCommunicationServer::AttachToProcess (lldb::pid_t pid) 621 { 622 Error error; 623 624 if (!IsGdbServer ()) 625 { 626 error.SetErrorString("cannot AttachToProcess () unless process is lldb-gdbserver"); 627 return error; 628 } 629 630 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 631 if (log) 632 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64, __FUNCTION__, pid); 633 634 // Scope for mutex locker. 635 { 636 // Before we try to attach, make sure we aren't already monitoring something else. 637 Mutex::Locker locker (m_spawned_pids_mutex); 638 if (!m_spawned_pids.empty ()) 639 { 640 error.SetErrorStringWithFormat ("cannot attach to a process %" PRIu64 " when another process with pid %" PRIu64 " is being debugged.", pid, *m_spawned_pids.begin()); 641 return error; 642 } 643 644 // Try to attach. 645 error = m_platform_sp->AttachNativeProcess (pid, *this, m_debugged_process_sp); 646 if (!error.Success ()) 647 { 648 fprintf (stderr, "%s: failed to attach to process %" PRIu64 ": %s", __FUNCTION__, pid, error.AsCString ()); 649 return error; 650 } 651 652 // Setup stdout/stderr mapping from inferior. 653 auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); 654 if (terminal_fd >= 0) 655 { 656 if (log) 657 log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); 658 error = SetSTDIOFileDescriptor (terminal_fd); 659 if (error.Fail ()) 660 return error; 661 } 662 else 663 { 664 if (log) 665 log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); 666 } 667 668 printf ("Attached to process %" PRIu64 "...\n", pid); 669 670 // Add to list of spawned processes. 671 assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); 672 m_spawned_pids.insert (pid); 673 674 return error; 675 } 676 } 677 678 void 679 GDBRemoteCommunicationServer::InitializeDelegate (lldb_private::NativeProcessProtocol *process) 680 { 681 assert (process && "process cannot be NULL"); 682 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 683 if (log) 684 { 685 log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", current state: %s", 686 __FUNCTION__, 687 process->GetID (), 688 StateAsCString (process->GetState ())); 689 } 690 } 691 692 GDBRemoteCommunication::PacketResult 693 GDBRemoteCommunicationServer::SendWResponse (lldb_private::NativeProcessProtocol *process) 694 { 695 assert (process && "process cannot be NULL"); 696 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 697 698 // send W notification 699 ExitType exit_type = ExitType::eExitTypeInvalid; 700 int return_code = 0; 701 std::string exit_description; 702 703 const bool got_exit_info = process->GetExitStatus (&exit_type, &return_code, exit_description); 704 if (!got_exit_info) 705 { 706 if (log) 707 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", failed to retrieve process exit status", __FUNCTION__, process->GetID ()); 708 709 StreamGDBRemote response; 710 response.PutChar ('E'); 711 response.PutHex8 (GDBRemoteServerError::eErrorExitStatus); 712 return SendPacketNoLock(response.GetData(), response.GetSize()); 713 } 714 else 715 { 716 if (log) 717 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 ()); 718 719 StreamGDBRemote response; 720 721 char return_type_code; 722 switch (exit_type) 723 { 724 case ExitType::eExitTypeExit: 725 return_type_code = 'W'; 726 break; 727 case ExitType::eExitTypeSignal: 728 return_type_code = 'X'; 729 break; 730 case ExitType::eExitTypeStop: 731 return_type_code = 'S'; 732 break; 733 case ExitType::eExitTypeInvalid: 734 return_type_code = 'E'; 735 break; 736 } 737 response.PutChar (return_type_code); 738 739 // POSIX exit status limited to unsigned 8 bits. 740 response.PutHex8 (return_code); 741 742 return SendPacketNoLock(response.GetData(), response.GetSize()); 743 } 744 } 745 746 static void 747 AppendHexValue (StreamString &response, const uint8_t* buf, uint32_t buf_size, bool swap) 748 { 749 int64_t i; 750 if (swap) 751 { 752 for (i = buf_size-1; i >= 0; i--) 753 response.PutHex8 (buf[i]); 754 } 755 else 756 { 757 for (i = 0; i < buf_size; i++) 758 response.PutHex8 (buf[i]); 759 } 760 } 761 762 static void 763 WriteRegisterValueInHexFixedWidth (StreamString &response, 764 NativeRegisterContextSP ®_ctx_sp, 765 const RegisterInfo ®_info, 766 const RegisterValue *reg_value_p) 767 { 768 RegisterValue reg_value; 769 if (!reg_value_p) 770 { 771 Error error = reg_ctx_sp->ReadRegister (®_info, reg_value); 772 if (error.Success ()) 773 reg_value_p = ®_value; 774 // else log. 775 } 776 777 if (reg_value_p) 778 { 779 AppendHexValue (response, (const uint8_t*) reg_value_p->GetBytes (), reg_value_p->GetByteSize (), false); 780 } 781 else 782 { 783 // Zero-out any unreadable values. 784 if (reg_info.byte_size > 0) 785 { 786 std::basic_string<uint8_t> zeros(reg_info.byte_size, '\0'); 787 AppendHexValue (response, zeros.data(), zeros.size(), false); 788 } 789 } 790 } 791 792 // WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); 793 794 795 static void 796 WriteGdbRegnumWithFixedWidthHexRegisterValue (StreamString &response, 797 NativeRegisterContextSP ®_ctx_sp, 798 const RegisterInfo ®_info, 799 const RegisterValue ®_value) 800 { 801 // Output the register number as 'NN:VVVVVVVV;' where NN is a 2 bytes HEX 802 // gdb register number, and VVVVVVVV is the correct number of hex bytes 803 // as ASCII for the register value. 804 if (reg_info.kinds[eRegisterKindGDB] == LLDB_INVALID_REGNUM) 805 return; 806 807 response.Printf ("%.02x:", reg_info.kinds[eRegisterKindGDB]); 808 WriteRegisterValueInHexFixedWidth (response, reg_ctx_sp, reg_info, ®_value); 809 response.PutChar (';'); 810 } 811 812 813 GDBRemoteCommunication::PacketResult 814 GDBRemoteCommunicationServer::SendStopReplyPacketForThread (lldb::tid_t tid) 815 { 816 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 817 818 // Ensure we're llgs. 819 if (!IsGdbServer ()) 820 { 821 // Only supported on llgs 822 return SendUnimplementedResponse (""); 823 } 824 825 // Ensure we have a debugged process. 826 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 827 return SendErrorResponse (50); 828 829 if (log) 830 log->Printf ("GDBRemoteCommunicationServer::%s preparing packet for pid %" PRIu64 " tid %" PRIu64, 831 __FUNCTION__, m_debugged_process_sp->GetID (), tid); 832 833 // Ensure we can get info on the given thread. 834 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); 835 if (!thread_sp) 836 return SendErrorResponse (51); 837 838 // Grab the reason this thread stopped. 839 struct ThreadStopInfo tid_stop_info; 840 if (!thread_sp->GetStopReason (tid_stop_info)) 841 return SendErrorResponse (52); 842 843 const bool did_exec = tid_stop_info.reason == eStopReasonExec; 844 // FIXME implement register handling for exec'd inferiors. 845 // if (did_exec) 846 // { 847 // const bool force = true; 848 // InitializeRegisters(force); 849 // } 850 851 StreamString response; 852 // Output the T packet with the thread 853 response.PutChar ('T'); 854 int signum = tid_stop_info.details.signal.signo; 855 if (log) 856 { 857 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64, 858 __FUNCTION__, 859 m_debugged_process_sp->GetID (), 860 tid, 861 signum, 862 tid_stop_info.reason, 863 tid_stop_info.details.exception.type); 864 } 865 866 switch (tid_stop_info.reason) 867 { 868 case eStopReasonSignal: 869 case eStopReasonException: 870 signum = thread_sp->TranslateStopInfoToGdbSignal (tid_stop_info); 871 break; 872 default: 873 signum = 0; 874 if (log) 875 { 876 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " has stop reason %d, using signo = 0 in stop reply response", 877 __FUNCTION__, 878 m_debugged_process_sp->GetID (), 879 tid, 880 tid_stop_info.reason); 881 } 882 break; 883 } 884 885 // Print the signal number. 886 response.PutHex8 (signum & 0xff); 887 888 // Include the tid. 889 response.Printf ("thread:%" PRIx64 ";", tid); 890 891 // Include the thread name if there is one. 892 const std::string thread_name = thread_sp->GetName (); 893 if (!thread_name.empty ()) 894 { 895 size_t thread_name_len = thread_name.length (); 896 897 if (::strcspn (thread_name.c_str (), "$#+-;:") == thread_name_len) 898 { 899 response.PutCString ("name:"); 900 response.PutCString (thread_name.c_str ()); 901 } 902 else 903 { 904 // The thread name contains special chars, send as hex bytes. 905 response.PutCString ("hexname:"); 906 response.PutCStringAsRawHex8 (thread_name.c_str ()); 907 } 908 response.PutChar (';'); 909 } 910 911 // FIXME look for analog 912 // thread_identifier_info_data_t thread_ident_info; 913 // if (DNBThreadGetIdentifierInfo (pid, tid, &thread_ident_info)) 914 // { 915 // if (thread_ident_info.dispatch_qaddr != 0) 916 // ostrm << std::hex << "qaddr:" << thread_ident_info.dispatch_qaddr << ';'; 917 // } 918 919 // If a 'QListThreadsInStopReply' was sent to enable this feature, we 920 // will send all thread IDs back in the "threads" key whose value is 921 // a list of hex thread IDs separated by commas: 922 // "threads:10a,10b,10c;" 923 // This will save the debugger from having to send a pair of qfThreadInfo 924 // and qsThreadInfo packets, but it also might take a lot of room in the 925 // stop reply packet, so it must be enabled only on systems where there 926 // are no limits on packet lengths. 927 if (m_list_threads_in_stop_reply) 928 { 929 response.PutCString ("threads:"); 930 931 uint32_t thread_index = 0; 932 NativeThreadProtocolSP listed_thread_sp; 933 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)) 934 { 935 if (thread_index > 0) 936 response.PutChar (','); 937 response.Printf ("%" PRIx64, listed_thread_sp->GetID ()); 938 } 939 response.PutChar (';'); 940 } 941 942 // 943 // Expedite registers. 944 // 945 946 // Grab the register context. 947 NativeRegisterContextSP reg_ctx_sp = thread_sp->GetRegisterContext (); 948 if (reg_ctx_sp) 949 { 950 // Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers. 951 const RegisterSet *reg_set_p; 952 if (reg_ctx_sp->GetRegisterSetCount () > 0 && ((reg_set_p = reg_ctx_sp->GetRegisterSet (0)) != nullptr)) 953 { 954 if (log) 955 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); 956 957 for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p) 958 { 959 const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex (*reg_num_p); 960 if (reg_info_p == nullptr) 961 { 962 if (log) 963 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); 964 } 965 else if (reg_info_p->value_regs == nullptr) 966 { 967 // Only expediate registers that are not contained in other registers. 968 RegisterValue reg_value; 969 Error error = reg_ctx_sp->ReadRegister (reg_info_p, reg_value); 970 if (error.Success ()) 971 WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); 972 else 973 { 974 if (log) 975 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 ()); 976 977 } 978 } 979 } 980 } 981 } 982 983 if (did_exec) 984 { 985 response.PutCString ("reason:exec;"); 986 } 987 else if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type) 988 { 989 response.PutCString ("metype:"); 990 response.PutHex64 (tid_stop_info.details.exception.type); 991 response.PutCString (";mecount:"); 992 response.PutHex32 (tid_stop_info.details.exception.data_count); 993 response.PutChar (';'); 994 995 for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i) 996 { 997 response.PutCString ("medata:"); 998 response.PutHex64 (tid_stop_info.details.exception.data[i]); 999 response.PutChar (';'); 1000 } 1001 } 1002 1003 return SendPacketNoLock (response.GetData(), response.GetSize()); 1004 } 1005 1006 void 1007 GDBRemoteCommunicationServer::HandleInferiorState_Exited (lldb_private::NativeProcessProtocol *process) 1008 { 1009 assert (process && "process cannot be NULL"); 1010 1011 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1012 if (log) 1013 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 1014 1015 // Send the exit result, and don't flush output. 1016 // Note: flushing output here would join the inferior stdio reflection thread, which 1017 // would gunk up the waitpid monitor thread that is calling this. 1018 PacketResult result = SendStopReasonForState (StateType::eStateExited, false); 1019 if (result != PacketResult::Success) 1020 { 1021 if (log) 1022 log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); 1023 } 1024 1025 // Remove the process from the list of spawned pids. 1026 { 1027 Mutex::Locker locker (m_spawned_pids_mutex); 1028 if (m_spawned_pids.erase (process->GetID ()) < 1) 1029 { 1030 if (log) 1031 log->Printf ("GDBRemoteCommunicationServer::%s failed to remove PID %" PRIu64 " from the spawned pids list", __FUNCTION__, process->GetID ()); 1032 1033 } 1034 } 1035 1036 // FIXME can't do this yet - since process state propagation is currently 1037 // synchronous, it is running off the NativeProcessProtocol's innards and 1038 // will tear down the NPP while it still has code to execute. 1039 #if 0 1040 // Clear the NativeProcessProtocol pointer. 1041 { 1042 Mutex::Locker locker (m_debugged_process_mutex); 1043 m_debugged_process_sp.reset(); 1044 } 1045 #endif 1046 1047 // Close the pipe to the inferior terminal i/o if we launched it 1048 // and set one up. Otherwise, 'k' and its flush of stdio could 1049 // end up waiting on a thread join that will never end. Consider 1050 // adding a timeout to the connection thread join call so we 1051 // can avoid that scenario altogether. 1052 MaybeCloseInferiorTerminalConnection (); 1053 1054 // We are ready to exit the debug monitor. 1055 m_exit_now = true; 1056 } 1057 1058 void 1059 GDBRemoteCommunicationServer::HandleInferiorState_Stopped (lldb_private::NativeProcessProtocol *process) 1060 { 1061 assert (process && "process cannot be NULL"); 1062 1063 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1064 if (log) 1065 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 1066 1067 // Send the stop reason unless this is the stop after the 1068 // launch or attach. 1069 switch (m_inferior_prev_state) 1070 { 1071 case eStateLaunching: 1072 case eStateAttaching: 1073 // Don't send anything per debugserver behavior. 1074 break; 1075 default: 1076 // In all other cases, send the stop reason. 1077 PacketResult result = SendStopReasonForState (StateType::eStateStopped, false); 1078 if (result != PacketResult::Success) 1079 { 1080 if (log) 1081 log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); 1082 } 1083 break; 1084 } 1085 } 1086 1087 void 1088 GDBRemoteCommunicationServer::ProcessStateChanged (lldb_private::NativeProcessProtocol *process, lldb::StateType state) 1089 { 1090 assert (process && "process cannot be NULL"); 1091 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1092 if (log) 1093 { 1094 log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", state: %s", 1095 __FUNCTION__, 1096 process->GetID (), 1097 StateAsCString (state)); 1098 } 1099 1100 switch (state) 1101 { 1102 case StateType::eStateExited: 1103 HandleInferiorState_Exited (process); 1104 break; 1105 1106 case StateType::eStateStopped: 1107 HandleInferiorState_Stopped (process); 1108 break; 1109 1110 default: 1111 if (log) 1112 { 1113 log->Printf ("GDBRemoteCommunicationServer::%s didn't handle state change for pid %" PRIu64 ", new state: %s", 1114 __FUNCTION__, 1115 process->GetID (), 1116 StateAsCString (state)); 1117 } 1118 break; 1119 } 1120 1121 // Remember the previous state reported to us. 1122 m_inferior_prev_state = state; 1123 } 1124 1125 void 1126 GDBRemoteCommunicationServer::DidExec (NativeProcessProtocol *process) 1127 { 1128 ClearProcessSpecificData (); 1129 } 1130 1131 GDBRemoteCommunication::PacketResult 1132 GDBRemoteCommunicationServer::SendONotification (const char *buffer, uint32_t len) 1133 { 1134 if ((buffer == nullptr) || (len == 0)) 1135 { 1136 // Nothing to send. 1137 return PacketResult::Success; 1138 } 1139 1140 StreamString response; 1141 response.PutChar ('O'); 1142 response.PutBytesAsRawHex8 (buffer, len); 1143 1144 return SendPacketNoLock (response.GetData (), response.GetSize ()); 1145 } 1146 1147 lldb_private::Error 1148 GDBRemoteCommunicationServer::SetSTDIOFileDescriptor (int fd) 1149 { 1150 Error error; 1151 1152 // Set up the Read Thread for reading/handling process I/O 1153 std::unique_ptr<ConnectionFileDescriptor> conn_up (new ConnectionFileDescriptor (fd, true)); 1154 if (!conn_up) 1155 { 1156 error.SetErrorString ("failed to create ConnectionFileDescriptor"); 1157 return error; 1158 } 1159 1160 m_stdio_communication.SetConnection (conn_up.release()); 1161 if (!m_stdio_communication.IsConnected ()) 1162 { 1163 error.SetErrorString ("failed to set connection for inferior I/O communication"); 1164 return error; 1165 } 1166 1167 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 1168 m_stdio_communication.StartReadThread(); 1169 1170 return error; 1171 } 1172 1173 void 1174 GDBRemoteCommunicationServer::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 1175 { 1176 GDBRemoteCommunicationServer *server = reinterpret_cast<GDBRemoteCommunicationServer*> (baton); 1177 static_cast<void> (server->SendONotification (static_cast<const char *>(src), src_len)); 1178 } 1179 1180 GDBRemoteCommunication::PacketResult 1181 GDBRemoteCommunicationServer::SendUnimplementedResponse (const char *) 1182 { 1183 // TODO: Log the packet we aren't handling... 1184 return SendPacketNoLock ("", 0); 1185 } 1186 1187 1188 GDBRemoteCommunication::PacketResult 1189 GDBRemoteCommunicationServer::SendErrorResponse (uint8_t err) 1190 { 1191 char packet[16]; 1192 int packet_len = ::snprintf (packet, sizeof(packet), "E%2.2x", err); 1193 assert (packet_len < (int)sizeof(packet)); 1194 return SendPacketNoLock (packet, packet_len); 1195 } 1196 1197 GDBRemoteCommunication::PacketResult 1198 GDBRemoteCommunicationServer::SendIllFormedResponse (const StringExtractorGDBRemote &failed_packet, const char *message) 1199 { 1200 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PACKETS)); 1201 if (log) 1202 log->Printf ("GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)", __FUNCTION__, failed_packet.GetStringRef ().c_str (), message ? message : ""); 1203 return SendErrorResponse (0x03); 1204 } 1205 1206 GDBRemoteCommunication::PacketResult 1207 GDBRemoteCommunicationServer::SendOKResponse () 1208 { 1209 return SendPacketNoLock ("OK", 2); 1210 } 1211 1212 bool 1213 GDBRemoteCommunicationServer::HandshakeWithClient(Error *error_ptr) 1214 { 1215 return GetAck() == PacketResult::Success; 1216 } 1217 1218 GDBRemoteCommunication::PacketResult 1219 GDBRemoteCommunicationServer::Handle_qHostInfo (StringExtractorGDBRemote &packet) 1220 { 1221 StreamString response; 1222 1223 // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00 1224 1225 ArchSpec host_arch(HostInfo::GetArchitecture()); 1226 const llvm::Triple &host_triple = host_arch.GetTriple(); 1227 response.PutCString("triple:"); 1228 response.PutCStringAsRawHex8(host_triple.getTriple().c_str()); 1229 response.Printf (";ptrsize:%u;",host_arch.GetAddressByteSize()); 1230 1231 const char* distribution_id = host_arch.GetDistributionId ().AsCString (); 1232 if (distribution_id) 1233 { 1234 response.PutCString("distribution_id:"); 1235 response.PutCStringAsRawHex8(distribution_id); 1236 response.PutCString(";"); 1237 } 1238 1239 // Only send out MachO info when lldb-platform/llgs is running on a MachO host. 1240 #if defined(__APPLE__) 1241 uint32_t cpu = host_arch.GetMachOCPUType(); 1242 uint32_t sub = host_arch.GetMachOCPUSubType(); 1243 if (cpu != LLDB_INVALID_CPUTYPE) 1244 response.Printf ("cputype:%u;", cpu); 1245 if (sub != LLDB_INVALID_CPUTYPE) 1246 response.Printf ("cpusubtype:%u;", sub); 1247 1248 if (cpu == ArchSpec::kCore_arm_any) 1249 response.Printf("watchpoint_exceptions_received:before;"); // On armv7 we use "synchronous" watchpoints which means the exception is delivered before the instruction executes. 1250 else 1251 response.Printf("watchpoint_exceptions_received:after;"); 1252 #else 1253 response.Printf("watchpoint_exceptions_received:after;"); 1254 #endif 1255 1256 switch (lldb::endian::InlHostByteOrder()) 1257 { 1258 case eByteOrderBig: response.PutCString ("endian:big;"); break; 1259 case eByteOrderLittle: response.PutCString ("endian:little;"); break; 1260 case eByteOrderPDP: response.PutCString ("endian:pdp;"); break; 1261 default: response.PutCString ("endian:unknown;"); break; 1262 } 1263 1264 uint32_t major = UINT32_MAX; 1265 uint32_t minor = UINT32_MAX; 1266 uint32_t update = UINT32_MAX; 1267 if (HostInfo::GetOSVersion(major, minor, update)) 1268 { 1269 if (major != UINT32_MAX) 1270 { 1271 response.Printf("os_version:%u", major); 1272 if (minor != UINT32_MAX) 1273 { 1274 response.Printf(".%u", minor); 1275 if (update != UINT32_MAX) 1276 response.Printf(".%u", update); 1277 } 1278 response.PutChar(';'); 1279 } 1280 } 1281 1282 std::string s; 1283 if (HostInfo::GetOSBuildString(s)) 1284 { 1285 response.PutCString ("os_build:"); 1286 response.PutCStringAsRawHex8(s.c_str()); 1287 response.PutChar(';'); 1288 } 1289 if (HostInfo::GetOSKernelDescription(s)) 1290 { 1291 response.PutCString ("os_kernel:"); 1292 response.PutCStringAsRawHex8(s.c_str()); 1293 response.PutChar(';'); 1294 } 1295 1296 #if defined(__APPLE__) 1297 1298 #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1299 // For iOS devices, we are connected through a USB Mux so we never pretend 1300 // to actually have a hostname as far as the remote lldb that is connecting 1301 // to this lldb-platform is concerned 1302 response.PutCString ("hostname:"); 1303 response.PutCStringAsRawHex8("127.0.0.1"); 1304 response.PutChar(';'); 1305 #else // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1306 if (HostInfo::GetHostname(s)) 1307 { 1308 response.PutCString ("hostname:"); 1309 response.PutCStringAsRawHex8(s.c_str()); 1310 response.PutChar(';'); 1311 } 1312 #endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1313 1314 #else // #if defined(__APPLE__) 1315 if (HostInfo::GetHostname(s)) 1316 { 1317 response.PutCString ("hostname:"); 1318 response.PutCStringAsRawHex8(s.c_str()); 1319 response.PutChar(';'); 1320 } 1321 #endif // #if defined(__APPLE__) 1322 1323 return SendPacketNoLock (response.GetData(), response.GetSize()); 1324 } 1325 1326 static void 1327 CreateProcessInfoResponse (const ProcessInstanceInfo &proc_info, StreamString &response) 1328 { 1329 response.Printf ("pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;", 1330 proc_info.GetProcessID(), 1331 proc_info.GetParentProcessID(), 1332 proc_info.GetUserID(), 1333 proc_info.GetGroupID(), 1334 proc_info.GetEffectiveUserID(), 1335 proc_info.GetEffectiveGroupID()); 1336 response.PutCString ("name:"); 1337 response.PutCStringAsRawHex8(proc_info.GetName()); 1338 response.PutChar(';'); 1339 const ArchSpec &proc_arch = proc_info.GetArchitecture(); 1340 if (proc_arch.IsValid()) 1341 { 1342 const llvm::Triple &proc_triple = proc_arch.GetTriple(); 1343 response.PutCString("triple:"); 1344 response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); 1345 response.PutChar(';'); 1346 } 1347 } 1348 1349 static void 1350 CreateProcessInfoResponse_DebugServerStyle (const ProcessInstanceInfo &proc_info, StreamString &response) 1351 { 1352 response.Printf ("pid:%" PRIx64 ";parent-pid:%" PRIx64 ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;", 1353 proc_info.GetProcessID(), 1354 proc_info.GetParentProcessID(), 1355 proc_info.GetUserID(), 1356 proc_info.GetGroupID(), 1357 proc_info.GetEffectiveUserID(), 1358 proc_info.GetEffectiveGroupID()); 1359 1360 const ArchSpec &proc_arch = proc_info.GetArchitecture(); 1361 if (proc_arch.IsValid()) 1362 { 1363 const llvm::Triple &proc_triple = proc_arch.GetTriple(); 1364 #if defined(__APPLE__) 1365 // We'll send cputype/cpusubtype. 1366 const uint32_t cpu_type = proc_arch.GetMachOCPUType(); 1367 if (cpu_type != 0) 1368 response.Printf ("cputype:%" PRIx32 ";", cpu_type); 1369 1370 const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType(); 1371 if (cpu_subtype != 0) 1372 response.Printf ("cpusubtype:%" PRIx32 ";", cpu_subtype); 1373 1374 1375 const std::string vendor = proc_triple.getVendorName (); 1376 if (!vendor.empty ()) 1377 response.Printf ("vendor:%s;", vendor.c_str ()); 1378 #else 1379 // We'll send the triple. 1380 response.PutCString("triple:"); 1381 response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); 1382 response.PutChar(';'); 1383 1384 #endif 1385 std::string ostype = proc_triple.getOSName (); 1386 // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64. 1387 if (proc_triple.getVendor () == llvm::Triple::Apple) 1388 { 1389 switch (proc_triple.getArch ()) 1390 { 1391 case llvm::Triple::arm: 1392 case llvm::Triple::aarch64: 1393 ostype = "ios"; 1394 break; 1395 default: 1396 // No change. 1397 break; 1398 } 1399 } 1400 response.Printf ("ostype:%s;", ostype.c_str ()); 1401 1402 1403 switch (proc_arch.GetByteOrder ()) 1404 { 1405 case lldb::eByteOrderLittle: response.PutCString ("endian:little;"); break; 1406 case lldb::eByteOrderBig: response.PutCString ("endian:big;"); break; 1407 case lldb::eByteOrderPDP: response.PutCString ("endian:pdp;"); break; 1408 default: 1409 // Nothing. 1410 break; 1411 } 1412 1413 if (proc_triple.isArch64Bit ()) 1414 response.PutCString ("ptrsize:8;"); 1415 else if (proc_triple.isArch32Bit ()) 1416 response.PutCString ("ptrsize:4;"); 1417 else if (proc_triple.isArch16Bit ()) 1418 response.PutCString ("ptrsize:2;"); 1419 } 1420 1421 } 1422 1423 1424 GDBRemoteCommunication::PacketResult 1425 GDBRemoteCommunicationServer::Handle_qProcessInfo (StringExtractorGDBRemote &packet) 1426 { 1427 // Only the gdb server handles this. 1428 if (!IsGdbServer ()) 1429 return SendUnimplementedResponse (packet.GetStringRef ().c_str ()); 1430 1431 // Fail if we don't have a current process. 1432 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 1433 return SendErrorResponse (68); 1434 1435 ProcessInstanceInfo proc_info; 1436 if (Host::GetProcessInfo (m_debugged_process_sp->GetID (), proc_info)) 1437 { 1438 StreamString response; 1439 CreateProcessInfoResponse_DebugServerStyle(proc_info, response); 1440 return SendPacketNoLock (response.GetData (), response.GetSize ()); 1441 } 1442 1443 return SendErrorResponse (1); 1444 } 1445 1446 GDBRemoteCommunication::PacketResult 1447 GDBRemoteCommunicationServer::Handle_qProcessInfoPID (StringExtractorGDBRemote &packet) 1448 { 1449 // Packet format: "qProcessInfoPID:%i" where %i is the pid 1450 packet.SetFilePos(::strlen ("qProcessInfoPID:")); 1451 lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID); 1452 if (pid != LLDB_INVALID_PROCESS_ID) 1453 { 1454 ProcessInstanceInfo proc_info; 1455 if (Host::GetProcessInfo(pid, proc_info)) 1456 { 1457 StreamString response; 1458 CreateProcessInfoResponse (proc_info, response); 1459 return SendPacketNoLock (response.GetData(), response.GetSize()); 1460 } 1461 } 1462 return SendErrorResponse (1); 1463 } 1464 1465 GDBRemoteCommunication::PacketResult 1466 GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet) 1467 { 1468 m_proc_infos_index = 0; 1469 m_proc_infos.Clear(); 1470 1471 ProcessInstanceInfoMatch match_info; 1472 packet.SetFilePos(::strlen ("qfProcessInfo")); 1473 if (packet.GetChar() == ':') 1474 { 1475 1476 std::string key; 1477 std::string value; 1478 while (packet.GetNameColonValue(key, value)) 1479 { 1480 bool success = true; 1481 if (key.compare("name") == 0) 1482 { 1483 StringExtractor extractor; 1484 extractor.GetStringRef().swap(value); 1485 extractor.GetHexByteString (value); 1486 match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false); 1487 } 1488 else if (key.compare("name_match") == 0) 1489 { 1490 if (value.compare("equals") == 0) 1491 { 1492 match_info.SetNameMatchType (eNameMatchEquals); 1493 } 1494 else if (value.compare("starts_with") == 0) 1495 { 1496 match_info.SetNameMatchType (eNameMatchStartsWith); 1497 } 1498 else if (value.compare("ends_with") == 0) 1499 { 1500 match_info.SetNameMatchType (eNameMatchEndsWith); 1501 } 1502 else if (value.compare("contains") == 0) 1503 { 1504 match_info.SetNameMatchType (eNameMatchContains); 1505 } 1506 else if (value.compare("regex") == 0) 1507 { 1508 match_info.SetNameMatchType (eNameMatchRegularExpression); 1509 } 1510 else 1511 { 1512 success = false; 1513 } 1514 } 1515 else if (key.compare("pid") == 0) 1516 { 1517 match_info.GetProcessInfo().SetProcessID (StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); 1518 } 1519 else if (key.compare("parent_pid") == 0) 1520 { 1521 match_info.GetProcessInfo().SetParentProcessID (StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); 1522 } 1523 else if (key.compare("uid") == 0) 1524 { 1525 match_info.GetProcessInfo().SetUserID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1526 } 1527 else if (key.compare("gid") == 0) 1528 { 1529 match_info.GetProcessInfo().SetGroupID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1530 } 1531 else if (key.compare("euid") == 0) 1532 { 1533 match_info.GetProcessInfo().SetEffectiveUserID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1534 } 1535 else if (key.compare("egid") == 0) 1536 { 1537 match_info.GetProcessInfo().SetEffectiveGroupID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1538 } 1539 else if (key.compare("all_users") == 0) 1540 { 1541 match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success)); 1542 } 1543 else if (key.compare("triple") == 0) 1544 { 1545 match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL); 1546 } 1547 else 1548 { 1549 success = false; 1550 } 1551 1552 if (!success) 1553 return SendErrorResponse (2); 1554 } 1555 } 1556 1557 if (Host::FindProcesses (match_info, m_proc_infos)) 1558 { 1559 // We found something, return the first item by calling the get 1560 // subsequent process info packet handler... 1561 return Handle_qsProcessInfo (packet); 1562 } 1563 return SendErrorResponse (3); 1564 } 1565 1566 GDBRemoteCommunication::PacketResult 1567 GDBRemoteCommunicationServer::Handle_qsProcessInfo (StringExtractorGDBRemote &packet) 1568 { 1569 if (m_proc_infos_index < m_proc_infos.GetSize()) 1570 { 1571 StreamString response; 1572 CreateProcessInfoResponse (m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response); 1573 ++m_proc_infos_index; 1574 return SendPacketNoLock (response.GetData(), response.GetSize()); 1575 } 1576 return SendErrorResponse (4); 1577 } 1578 1579 GDBRemoteCommunication::PacketResult 1580 GDBRemoteCommunicationServer::Handle_qUserName (StringExtractorGDBRemote &packet) 1581 { 1582 #if !defined(LLDB_DISABLE_POSIX) 1583 // Packet format: "qUserName:%i" where %i is the uid 1584 packet.SetFilePos(::strlen ("qUserName:")); 1585 uint32_t uid = packet.GetU32 (UINT32_MAX); 1586 if (uid != UINT32_MAX) 1587 { 1588 std::string name; 1589 if (HostInfo::LookupUserName(uid, name)) 1590 { 1591 StreamString response; 1592 response.PutCStringAsRawHex8 (name.c_str()); 1593 return SendPacketNoLock (response.GetData(), response.GetSize()); 1594 } 1595 } 1596 #endif 1597 return SendErrorResponse (5); 1598 1599 } 1600 1601 GDBRemoteCommunication::PacketResult 1602 GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet) 1603 { 1604 #if !defined(LLDB_DISABLE_POSIX) 1605 // Packet format: "qGroupName:%i" where %i is the gid 1606 packet.SetFilePos(::strlen ("qGroupName:")); 1607 uint32_t gid = packet.GetU32 (UINT32_MAX); 1608 if (gid != UINT32_MAX) 1609 { 1610 std::string name; 1611 if (HostInfo::LookupGroupName(gid, name)) 1612 { 1613 StreamString response; 1614 response.PutCStringAsRawHex8 (name.c_str()); 1615 return SendPacketNoLock (response.GetData(), response.GetSize()); 1616 } 1617 } 1618 #endif 1619 return SendErrorResponse (6); 1620 } 1621 1622 GDBRemoteCommunication::PacketResult 1623 GDBRemoteCommunicationServer::Handle_qSpeedTest (StringExtractorGDBRemote &packet) 1624 { 1625 packet.SetFilePos(::strlen ("qSpeedTest:")); 1626 1627 std::string key; 1628 std::string value; 1629 bool success = packet.GetNameColonValue(key, value); 1630 if (success && key.compare("response_size") == 0) 1631 { 1632 uint32_t response_size = StringConvert::ToUInt32(value.c_str(), 0, 0, &success); 1633 if (success) 1634 { 1635 if (response_size == 0) 1636 return SendOKResponse(); 1637 StreamString response; 1638 uint32_t bytes_left = response_size; 1639 response.PutCString("data:"); 1640 while (bytes_left > 0) 1641 { 1642 if (bytes_left >= 26) 1643 { 1644 response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 1645 bytes_left -= 26; 1646 } 1647 else 1648 { 1649 response.Printf ("%*.*s;", bytes_left, bytes_left, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 1650 bytes_left = 0; 1651 } 1652 } 1653 return SendPacketNoLock (response.GetData(), response.GetSize()); 1654 } 1655 } 1656 return SendErrorResponse (7); 1657 } 1658 1659 // 1660 //static bool 1661 //WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds) 1662 //{ 1663 // const int time_delta_usecs = 100000; 1664 // const int num_retries = timeout_in_seconds/time_delta_usecs; 1665 // for (int i=0; i<num_retries; i++) 1666 // { 1667 // struct proc_bsdinfo bsd_info; 1668 // int error = ::proc_pidinfo (pid, PROC_PIDTBSDINFO, 1669 // (uint64_t) 0, 1670 // &bsd_info, 1671 // PROC_PIDTBSDINFO_SIZE); 1672 // 1673 // switch (error) 1674 // { 1675 // case EINVAL: 1676 // case ENOTSUP: 1677 // case ESRCH: 1678 // case EPERM: 1679 // return false; 1680 // 1681 // default: 1682 // break; 1683 // 1684 // case 0: 1685 // if (bsd_info.pbi_status == SSTOP) 1686 // return true; 1687 // } 1688 // ::usleep (time_delta_usecs); 1689 // } 1690 // return false; 1691 //} 1692 1693 GDBRemoteCommunication::PacketResult 1694 GDBRemoteCommunicationServer::Handle_A (StringExtractorGDBRemote &packet) 1695 { 1696 // The 'A' packet is the most over designed packet ever here with 1697 // redundant argument indexes, redundant argument lengths and needed hex 1698 // encoded argument string values. Really all that is needed is a comma 1699 // separated hex encoded argument value list, but we will stay true to the 1700 // documented version of the 'A' packet here... 1701 1702 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1703 int actual_arg_index = 0; 1704 1705 packet.SetFilePos(1); // Skip the 'A' 1706 bool success = true; 1707 while (success && packet.GetBytesLeft() > 0) 1708 { 1709 // Decode the decimal argument string length. This length is the 1710 // number of hex nibbles in the argument string value. 1711 const uint32_t arg_len = packet.GetU32(UINT32_MAX); 1712 if (arg_len == UINT32_MAX) 1713 success = false; 1714 else 1715 { 1716 // Make sure the argument hex string length is followed by a comma 1717 if (packet.GetChar() != ',') 1718 success = false; 1719 else 1720 { 1721 // Decode the argument index. We ignore this really because 1722 // who would really send down the arguments in a random order??? 1723 const uint32_t arg_idx = packet.GetU32(UINT32_MAX); 1724 if (arg_idx == UINT32_MAX) 1725 success = false; 1726 else 1727 { 1728 // Make sure the argument index is followed by a comma 1729 if (packet.GetChar() != ',') 1730 success = false; 1731 else 1732 { 1733 // Decode the argument string value from hex bytes 1734 // back into a UTF8 string and make sure the length 1735 // matches the one supplied in the packet 1736 std::string arg; 1737 if (packet.GetHexByteStringFixedLength(arg, arg_len) != (arg_len / 2)) 1738 success = false; 1739 else 1740 { 1741 // If there are any bytes left 1742 if (packet.GetBytesLeft()) 1743 { 1744 if (packet.GetChar() != ',') 1745 success = false; 1746 } 1747 1748 if (success) 1749 { 1750 if (arg_idx == 0) 1751 m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false); 1752 m_process_launch_info.GetArguments().AppendArgument(arg.c_str()); 1753 if (log) 1754 log->Printf ("GDBRemoteCommunicationServer::%s added arg %d: \"%s\"", __FUNCTION__, actual_arg_index, arg.c_str ()); 1755 ++actual_arg_index; 1756 } 1757 } 1758 } 1759 } 1760 } 1761 } 1762 } 1763 1764 if (success) 1765 { 1766 m_process_launch_error = LaunchProcess (); 1767 if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) 1768 { 1769 return SendOKResponse (); 1770 } 1771 else 1772 { 1773 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1774 if (log) 1775 log->Printf("GDBRemoteCommunicationServer::%s failed to launch exe: %s", 1776 __FUNCTION__, 1777 m_process_launch_error.AsCString()); 1778 1779 } 1780 } 1781 return SendErrorResponse (8); 1782 } 1783 1784 GDBRemoteCommunication::PacketResult 1785 GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet) 1786 { 1787 StreamString response; 1788 1789 if (IsGdbServer ()) 1790 { 1791 // Fail if we don't have a current process. 1792 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 1793 return SendErrorResponse (68); 1794 1795 // Make sure we set the current thread so g and p packets return 1796 // the data the gdb will expect. 1797 lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); 1798 SetCurrentThreadID (tid); 1799 1800 NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetCurrentThread (); 1801 if (!thread_sp) 1802 return SendErrorResponse (69); 1803 1804 response.Printf ("QC%" PRIx64, thread_sp->GetID ()); 1805 } 1806 else 1807 { 1808 // NOTE: lldb should now be using qProcessInfo for process IDs. This path here 1809 // should not be used. It is reporting process id instead of thread id. The 1810 // correct answer doesn't seem to make much sense for lldb-platform. 1811 // CONSIDER: flip to "unsupported". 1812 lldb::pid_t pid = m_process_launch_info.GetProcessID(); 1813 response.Printf("QC%" PRIx64, pid); 1814 1815 // this should always be platform here 1816 assert (m_is_platform && "this code path should only be traversed for lldb-platform"); 1817 1818 if (m_is_platform) 1819 { 1820 // If we launch a process and this GDB server is acting as a platform, 1821 // then we need to clear the process launch state so we can start 1822 // launching another process. In order to launch a process a bunch or 1823 // packets need to be sent: environment packets, working directory, 1824 // disable ASLR, and many more settings. When we launch a process we 1825 // then need to know when to clear this information. Currently we are 1826 // selecting the 'qC' packet as that packet which seems to make the most 1827 // sense. 1828 if (pid != LLDB_INVALID_PROCESS_ID) 1829 { 1830 m_process_launch_info.Clear(); 1831 } 1832 } 1833 } 1834 return SendPacketNoLock (response.GetData(), response.GetSize()); 1835 } 1836 1837 bool 1838 GDBRemoteCommunicationServer::DebugserverProcessReaped (lldb::pid_t pid) 1839 { 1840 Mutex::Locker locker (m_spawned_pids_mutex); 1841 FreePortForProcess(pid); 1842 return m_spawned_pids.erase(pid) > 0; 1843 } 1844 bool 1845 GDBRemoteCommunicationServer::ReapDebugserverProcess (void *callback_baton, 1846 lldb::pid_t pid, 1847 bool exited, 1848 int signal, // Zero for no signal 1849 int status) // Exit value of process if signal is zero 1850 { 1851 GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; 1852 server->DebugserverProcessReaped (pid); 1853 return true; 1854 } 1855 1856 bool 1857 GDBRemoteCommunicationServer::DebuggedProcessReaped (lldb::pid_t pid) 1858 { 1859 // reap a process that we were debugging (but not debugserver) 1860 Mutex::Locker locker (m_spawned_pids_mutex); 1861 return m_spawned_pids.erase(pid) > 0; 1862 } 1863 1864 bool 1865 GDBRemoteCommunicationServer::ReapDebuggedProcess (void *callback_baton, 1866 lldb::pid_t pid, 1867 bool exited, 1868 int signal, // Zero for no signal 1869 int status) // Exit value of process if signal is zero 1870 { 1871 GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; 1872 server->DebuggedProcessReaped (pid); 1873 return true; 1874 } 1875 1876 GDBRemoteCommunication::PacketResult 1877 GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet) 1878 { 1879 #ifdef _WIN32 1880 return SendErrorResponse(9); 1881 #else 1882 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); 1883 1884 // Spawn a local debugserver as a platform so we can then attach or launch 1885 // a process... 1886 1887 if (m_is_platform) 1888 { 1889 if (log) 1890 log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); 1891 1892 // Sleep and wait a bit for debugserver to start to listen... 1893 ConnectionFileDescriptor file_conn; 1894 std::string hostname; 1895 // TODO: /tmp/ should not be hardcoded. User might want to override /tmp 1896 // with the TMPDIR environment variable 1897 packet.SetFilePos(::strlen ("qLaunchGDBServer;")); 1898 std::string name; 1899 std::string value; 1900 uint16_t port = UINT16_MAX; 1901 while (packet.GetNameColonValue(name, value)) 1902 { 1903 if (name.compare ("host") == 0) 1904 hostname.swap(value); 1905 else if (name.compare ("port") == 0) 1906 port = StringConvert::ToUInt32(value.c_str(), 0, 0); 1907 } 1908 if (port == UINT16_MAX) 1909 port = GetNextAvailablePort(); 1910 1911 // Spawn a new thread to accept the port that gets bound after 1912 // binding to port 0 (zero). 1913 1914 // ignore the hostname send from the remote end, just use the ip address 1915 // that we're currently communicating with as the hostname 1916 1917 // Spawn a debugserver and try to get the port it listens to. 1918 ProcessLaunchInfo debugserver_launch_info; 1919 if (hostname.empty()) 1920 hostname = "127.0.0.1"; 1921 if (log) 1922 log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port); 1923 1924 debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false); 1925 1926 std::string platform_scheme; 1927 std::string platform_ip; 1928 int platform_port; 1929 std::string platform_path; 1930 bool ok = UriParser::Parse(GetConnection()->GetURI().c_str(), platform_scheme, platform_ip, platform_port, platform_path); 1931 assert(ok); 1932 Error error = StartDebugserverProcess ( 1933 platform_ip.c_str(), 1934 port, 1935 debugserver_launch_info, 1936 port); 1937 1938 lldb::pid_t debugserver_pid = debugserver_launch_info.GetProcessID(); 1939 1940 1941 if (debugserver_pid != LLDB_INVALID_PROCESS_ID) 1942 { 1943 Mutex::Locker locker (m_spawned_pids_mutex); 1944 m_spawned_pids.insert(debugserver_pid); 1945 if (port > 0) 1946 AssociatePortWithProcess(port, debugserver_pid); 1947 } 1948 else 1949 { 1950 if (port > 0) 1951 FreePort (port); 1952 } 1953 1954 if (error.Success()) 1955 { 1956 if (log) 1957 log->Printf ("GDBRemoteCommunicationServer::%s() debugserver launched successfully as pid %" PRIu64, __FUNCTION__, debugserver_pid); 1958 1959 char response[256]; 1960 const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset); 1961 assert (response_len < (int)sizeof(response)); 1962 PacketResult packet_result = SendPacketNoLock (response, response_len); 1963 1964 if (packet_result != PacketResult::Success) 1965 { 1966 if (debugserver_pid != LLDB_INVALID_PROCESS_ID) 1967 ::kill (debugserver_pid, SIGINT); 1968 } 1969 return packet_result; 1970 } 1971 else 1972 { 1973 if (log) 1974 log->Printf ("GDBRemoteCommunicationServer::%s() debugserver launch failed: %s", __FUNCTION__, error.AsCString ()); 1975 } 1976 } 1977 return SendErrorResponse (9); 1978 #endif 1979 } 1980 1981 bool 1982 GDBRemoteCommunicationServer::KillSpawnedProcess (lldb::pid_t pid) 1983 { 1984 // make sure we know about this process 1985 { 1986 Mutex::Locker locker (m_spawned_pids_mutex); 1987 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 1988 return false; 1989 } 1990 1991 // first try a SIGTERM (standard kill) 1992 Host::Kill (pid, SIGTERM); 1993 1994 // check if that worked 1995 for (size_t i=0; i<10; ++i) 1996 { 1997 { 1998 Mutex::Locker locker (m_spawned_pids_mutex); 1999 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2000 { 2001 // it is now killed 2002 return true; 2003 } 2004 } 2005 usleep (10000); 2006 } 2007 2008 // check one more time after the final usleep 2009 { 2010 Mutex::Locker locker (m_spawned_pids_mutex); 2011 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2012 return true; 2013 } 2014 2015 // the launched process still lives. Now try killing it again, 2016 // this time with an unblockable signal. 2017 Host::Kill (pid, SIGKILL); 2018 2019 for (size_t i=0; i<10; ++i) 2020 { 2021 { 2022 Mutex::Locker locker (m_spawned_pids_mutex); 2023 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2024 { 2025 // it is now killed 2026 return true; 2027 } 2028 } 2029 usleep (10000); 2030 } 2031 2032 // check one more time after the final usleep 2033 // Scope for locker 2034 { 2035 Mutex::Locker locker (m_spawned_pids_mutex); 2036 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2037 return true; 2038 } 2039 2040 // no luck - the process still lives 2041 return false; 2042 } 2043 2044 GDBRemoteCommunication::PacketResult 2045 GDBRemoteCommunicationServer::Handle_qKillSpawnedProcess (StringExtractorGDBRemote &packet) 2046 { 2047 packet.SetFilePos(::strlen ("qKillSpawnedProcess:")); 2048 2049 lldb::pid_t pid = packet.GetU64(LLDB_INVALID_PROCESS_ID); 2050 2051 // verify that we know anything about this pid. 2052 // Scope for locker 2053 { 2054 Mutex::Locker locker (m_spawned_pids_mutex); 2055 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2056 { 2057 // not a pid we know about 2058 return SendErrorResponse (10); 2059 } 2060 } 2061 2062 // go ahead and attempt to kill the spawned process 2063 if (KillSpawnedProcess (pid)) 2064 return SendOKResponse (); 2065 else 2066 return SendErrorResponse (11); 2067 } 2068 2069 GDBRemoteCommunication::PacketResult 2070 GDBRemoteCommunicationServer::Handle_k (StringExtractorGDBRemote &packet) 2071 { 2072 // ignore for now if we're lldb_platform 2073 if (m_is_platform) 2074 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2075 2076 // shutdown all spawned processes 2077 std::set<lldb::pid_t> spawned_pids_copy; 2078 2079 // copy pids 2080 { 2081 Mutex::Locker locker (m_spawned_pids_mutex); 2082 spawned_pids_copy.insert (m_spawned_pids.begin (), m_spawned_pids.end ()); 2083 } 2084 2085 // nuke the spawned processes 2086 for (auto it = spawned_pids_copy.begin (); it != spawned_pids_copy.end (); ++it) 2087 { 2088 lldb::pid_t spawned_pid = *it; 2089 if (!KillSpawnedProcess (spawned_pid)) 2090 { 2091 fprintf (stderr, "%s: failed to kill spawned pid %" PRIu64 ", ignoring.\n", __FUNCTION__, spawned_pid); 2092 } 2093 } 2094 2095 FlushInferiorOutput (); 2096 2097 // No OK response for kill packet. 2098 // return SendOKResponse (); 2099 return PacketResult::Success; 2100 } 2101 2102 GDBRemoteCommunication::PacketResult 2103 GDBRemoteCommunicationServer::Handle_qLaunchSuccess (StringExtractorGDBRemote &packet) 2104 { 2105 if (m_process_launch_error.Success()) 2106 return SendOKResponse(); 2107 StreamString response; 2108 response.PutChar('E'); 2109 response.PutCString(m_process_launch_error.AsCString("<unknown error>")); 2110 return SendPacketNoLock (response.GetData(), response.GetSize()); 2111 } 2112 2113 GDBRemoteCommunication::PacketResult 2114 GDBRemoteCommunicationServer::Handle_QEnvironment (StringExtractorGDBRemote &packet) 2115 { 2116 packet.SetFilePos(::strlen ("QEnvironment:")); 2117 const uint32_t bytes_left = packet.GetBytesLeft(); 2118 if (bytes_left > 0) 2119 { 2120 m_process_launch_info.GetEnvironmentEntries ().AppendArgument (packet.Peek()); 2121 return SendOKResponse (); 2122 } 2123 return SendErrorResponse (12); 2124 } 2125 2126 GDBRemoteCommunication::PacketResult 2127 GDBRemoteCommunicationServer::Handle_QLaunchArch (StringExtractorGDBRemote &packet) 2128 { 2129 packet.SetFilePos(::strlen ("QLaunchArch:")); 2130 const uint32_t bytes_left = packet.GetBytesLeft(); 2131 if (bytes_left > 0) 2132 { 2133 const char* arch_triple = packet.Peek(); 2134 ArchSpec arch_spec(arch_triple,NULL); 2135 m_process_launch_info.SetArchitecture(arch_spec); 2136 return SendOKResponse(); 2137 } 2138 return SendErrorResponse(13); 2139 } 2140 2141 GDBRemoteCommunication::PacketResult 2142 GDBRemoteCommunicationServer::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet) 2143 { 2144 packet.SetFilePos(::strlen ("QSetDisableASLR:")); 2145 if (packet.GetU32(0)) 2146 m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR); 2147 else 2148 m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR); 2149 return SendOKResponse (); 2150 } 2151 2152 GDBRemoteCommunication::PacketResult 2153 GDBRemoteCommunicationServer::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet) 2154 { 2155 packet.SetFilePos(::strlen ("QSetWorkingDir:")); 2156 std::string path; 2157 packet.GetHexByteString(path); 2158 if (m_is_platform) 2159 { 2160 #ifdef _WIN32 2161 // Not implemented on Windows 2162 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_QSetWorkingDir unimplemented"); 2163 #else 2164 // If this packet is sent to a platform, then change the current working directory 2165 if (::chdir(path.c_str()) != 0) 2166 return SendErrorResponse(errno); 2167 #endif 2168 } 2169 else 2170 { 2171 m_process_launch_info.SwapWorkingDirectory (path); 2172 } 2173 return SendOKResponse (); 2174 } 2175 2176 GDBRemoteCommunication::PacketResult 2177 GDBRemoteCommunicationServer::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet) 2178 { 2179 StreamString response; 2180 2181 if (m_is_platform) 2182 { 2183 // If this packet is sent to a platform, then change the current working directory 2184 char cwd[PATH_MAX]; 2185 if (getcwd(cwd, sizeof(cwd)) == NULL) 2186 { 2187 return SendErrorResponse(errno); 2188 } 2189 else 2190 { 2191 response.PutBytesAsRawHex8(cwd, strlen(cwd)); 2192 return SendPacketNoLock(response.GetData(), response.GetSize()); 2193 } 2194 } 2195 else 2196 { 2197 const char *working_dir = m_process_launch_info.GetWorkingDirectory(); 2198 if (working_dir && working_dir[0]) 2199 { 2200 response.PutBytesAsRawHex8(working_dir, strlen(working_dir)); 2201 return SendPacketNoLock(response.GetData(), response.GetSize()); 2202 } 2203 else 2204 { 2205 return SendErrorResponse(14); 2206 } 2207 } 2208 } 2209 2210 GDBRemoteCommunication::PacketResult 2211 GDBRemoteCommunicationServer::Handle_QSetSTDIN (StringExtractorGDBRemote &packet) 2212 { 2213 packet.SetFilePos(::strlen ("QSetSTDIN:")); 2214 FileAction file_action; 2215 std::string path; 2216 packet.GetHexByteString(path); 2217 const bool read = false; 2218 const bool write = true; 2219 if (file_action.Open(STDIN_FILENO, path.c_str(), read, write)) 2220 { 2221 m_process_launch_info.AppendFileAction(file_action); 2222 return SendOKResponse (); 2223 } 2224 return SendErrorResponse (15); 2225 } 2226 2227 GDBRemoteCommunication::PacketResult 2228 GDBRemoteCommunicationServer::Handle_QSetSTDOUT (StringExtractorGDBRemote &packet) 2229 { 2230 packet.SetFilePos(::strlen ("QSetSTDOUT:")); 2231 FileAction file_action; 2232 std::string path; 2233 packet.GetHexByteString(path); 2234 const bool read = true; 2235 const bool write = false; 2236 if (file_action.Open(STDOUT_FILENO, path.c_str(), read, write)) 2237 { 2238 m_process_launch_info.AppendFileAction(file_action); 2239 return SendOKResponse (); 2240 } 2241 return SendErrorResponse (16); 2242 } 2243 2244 GDBRemoteCommunication::PacketResult 2245 GDBRemoteCommunicationServer::Handle_QSetSTDERR (StringExtractorGDBRemote &packet) 2246 { 2247 packet.SetFilePos(::strlen ("QSetSTDERR:")); 2248 FileAction file_action; 2249 std::string path; 2250 packet.GetHexByteString(path); 2251 const bool read = true; 2252 const bool write = false; 2253 if (file_action.Open(STDERR_FILENO, path.c_str(), read, write)) 2254 { 2255 m_process_launch_info.AppendFileAction(file_action); 2256 return SendOKResponse (); 2257 } 2258 return SendErrorResponse (17); 2259 } 2260 2261 GDBRemoteCommunication::PacketResult 2262 GDBRemoteCommunicationServer::Handle_C (StringExtractorGDBRemote &packet) 2263 { 2264 if (!IsGdbServer ()) 2265 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2266 2267 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 2268 if (log) 2269 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 2270 2271 // Ensure we have a native process. 2272 if (!m_debugged_process_sp) 2273 { 2274 if (log) 2275 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2276 return SendErrorResponse (0x36); 2277 } 2278 2279 // Pull out the signal number. 2280 packet.SetFilePos (::strlen ("C")); 2281 if (packet.GetBytesLeft () < 1) 2282 { 2283 // Shouldn't be using a C without a signal. 2284 return SendIllFormedResponse (packet, "C packet specified without signal."); 2285 } 2286 const uint32_t signo = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 2287 if (signo == std::numeric_limits<uint32_t>::max ()) 2288 return SendIllFormedResponse (packet, "failed to parse signal number"); 2289 2290 // Handle optional continue address. 2291 if (packet.GetBytesLeft () > 0) 2292 { 2293 // FIXME add continue at address support for $C{signo}[;{continue-address}]. 2294 if (*packet.Peek () == ';') 2295 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2296 else 2297 return SendIllFormedResponse (packet, "unexpected content after $C{signal-number}"); 2298 } 2299 2300 lldb_private::ResumeActionList resume_actions (StateType::eStateRunning, 0); 2301 Error error; 2302 2303 // We have two branches: what to do if a continue thread is specified (in which case we target 2304 // sending the signal to that thread), or when we don't have a continue thread set (in which 2305 // case we send a signal to the process). 2306 2307 // TODO discuss with Greg Clayton, make sure this makes sense. 2308 2309 lldb::tid_t signal_tid = GetContinueThreadID (); 2310 if (signal_tid != LLDB_INVALID_THREAD_ID) 2311 { 2312 // The resume action for the continue thread (or all threads if a continue thread is not set). 2313 lldb_private::ResumeAction action = { GetContinueThreadID (), StateType::eStateRunning, static_cast<int> (signo) }; 2314 2315 // Add the action for the continue thread (or all threads when the continue thread isn't present). 2316 resume_actions.Append (action); 2317 } 2318 else 2319 { 2320 // Send the signal to the process since we weren't targeting a specific continue thread with the signal. 2321 error = m_debugged_process_sp->Signal (signo); 2322 if (error.Fail ()) 2323 { 2324 if (log) 2325 log->Printf ("GDBRemoteCommunicationServer::%s failed to send signal for process %" PRIu64 ": %s", 2326 __FUNCTION__, 2327 m_debugged_process_sp->GetID (), 2328 error.AsCString ()); 2329 2330 return SendErrorResponse (0x52); 2331 } 2332 } 2333 2334 // Resume the threads. 2335 error = m_debugged_process_sp->Resume (resume_actions); 2336 if (error.Fail ()) 2337 { 2338 if (log) 2339 log->Printf ("GDBRemoteCommunicationServer::%s failed to resume threads for process %" PRIu64 ": %s", 2340 __FUNCTION__, 2341 m_debugged_process_sp->GetID (), 2342 error.AsCString ()); 2343 2344 return SendErrorResponse (0x38); 2345 } 2346 2347 // Don't send an "OK" packet; response is the stopped/exited message. 2348 return PacketResult::Success; 2349 } 2350 2351 GDBRemoteCommunication::PacketResult 2352 GDBRemoteCommunicationServer::Handle_c (StringExtractorGDBRemote &packet, bool skip_file_pos_adjustment) 2353 { 2354 if (!IsGdbServer ()) 2355 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2356 2357 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 2358 if (log) 2359 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 2360 2361 // We reuse this method in vCont - don't double adjust the file position. 2362 if (!skip_file_pos_adjustment) 2363 packet.SetFilePos (::strlen ("c")); 2364 2365 // For now just support all continue. 2366 const bool has_continue_address = (packet.GetBytesLeft () > 0); 2367 if (has_continue_address) 2368 { 2369 if (log) 2370 log->Printf ("GDBRemoteCommunicationServer::%s not implemented for c{address} variant [%s remains]", __FUNCTION__, packet.Peek ()); 2371 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2372 } 2373 2374 // Ensure we have a native process. 2375 if (!m_debugged_process_sp) 2376 { 2377 if (log) 2378 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2379 return SendErrorResponse (0x36); 2380 } 2381 2382 // Build the ResumeActionList 2383 lldb_private::ResumeActionList actions (StateType::eStateRunning, 0); 2384 2385 Error error = m_debugged_process_sp->Resume (actions); 2386 if (error.Fail ()) 2387 { 2388 if (log) 2389 { 2390 log->Printf ("GDBRemoteCommunicationServer::%s c failed for process %" PRIu64 ": %s", 2391 __FUNCTION__, 2392 m_debugged_process_sp->GetID (), 2393 error.AsCString ()); 2394 } 2395 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 2396 } 2397 2398 if (log) 2399 log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 2400 2401 // No response required from continue. 2402 return PacketResult::Success; 2403 } 2404 2405 GDBRemoteCommunication::PacketResult 2406 GDBRemoteCommunicationServer::Handle_vCont_actions (StringExtractorGDBRemote &packet) 2407 { 2408 if (!IsGdbServer ()) 2409 { 2410 // only llgs supports $vCont. 2411 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2412 } 2413 2414 StreamString response; 2415 response.Printf("vCont;c;C;s;S"); 2416 2417 return SendPacketNoLock(response.GetData(), response.GetSize()); 2418 } 2419 2420 GDBRemoteCommunication::PacketResult 2421 GDBRemoteCommunicationServer::Handle_vCont (StringExtractorGDBRemote &packet) 2422 { 2423 if (!IsGdbServer ()) 2424 { 2425 // only llgs supports $vCont 2426 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2427 } 2428 2429 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 2430 if (log) 2431 log->Printf ("GDBRemoteCommunicationServer::%s handling vCont packet", __FUNCTION__); 2432 2433 packet.SetFilePos (::strlen ("vCont")); 2434 2435 // Check if this is all continue (no options or ";c"). 2436 if (!packet.GetBytesLeft () || (::strcmp (packet.Peek (), ";c") == 0)) 2437 { 2438 // Move the packet past the ";c". 2439 if (packet.GetBytesLeft ()) 2440 packet.SetFilePos (packet.GetFilePos () + ::strlen (";c")); 2441 2442 const bool skip_file_pos_adjustment = true; 2443 return Handle_c (packet, skip_file_pos_adjustment); 2444 } 2445 else if (::strcmp (packet.Peek (), ";s") == 0) 2446 { 2447 // Move past the ';', then do a simple 's'. 2448 packet.SetFilePos (packet.GetFilePos () + 1); 2449 return Handle_s (packet); 2450 } 2451 2452 // Ensure we have a native process. 2453 if (!m_debugged_process_sp) 2454 { 2455 if (log) 2456 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2457 return SendErrorResponse (0x36); 2458 } 2459 2460 ResumeActionList thread_actions; 2461 2462 while (packet.GetBytesLeft () && *packet.Peek () == ';') 2463 { 2464 // Skip the semi-colon. 2465 packet.GetChar (); 2466 2467 // Build up the thread action. 2468 ResumeAction thread_action; 2469 thread_action.tid = LLDB_INVALID_THREAD_ID; 2470 thread_action.state = eStateInvalid; 2471 thread_action.signal = 0; 2472 2473 const char action = packet.GetChar (); 2474 switch (action) 2475 { 2476 case 'C': 2477 thread_action.signal = packet.GetHexMaxU32 (false, 0); 2478 if (thread_action.signal == 0) 2479 return SendIllFormedResponse (packet, "Could not parse signal in vCont packet C action"); 2480 // Fall through to next case... 2481 2482 case 'c': 2483 // Continue 2484 thread_action.state = eStateRunning; 2485 break; 2486 2487 case 'S': 2488 thread_action.signal = packet.GetHexMaxU32 (false, 0); 2489 if (thread_action.signal == 0) 2490 return SendIllFormedResponse (packet, "Could not parse signal in vCont packet S action"); 2491 // Fall through to next case... 2492 2493 case 's': 2494 // Step 2495 thread_action.state = eStateStepping; 2496 break; 2497 2498 default: 2499 return SendIllFormedResponse (packet, "Unsupported vCont action"); 2500 break; 2501 } 2502 2503 // Parse out optional :{thread-id} value. 2504 if (packet.GetBytesLeft () && (*packet.Peek () == ':')) 2505 { 2506 // Consume the separator. 2507 packet.GetChar (); 2508 2509 thread_action.tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); 2510 if (thread_action.tid == LLDB_INVALID_THREAD_ID) 2511 return SendIllFormedResponse (packet, "Could not parse thread number in vCont packet"); 2512 } 2513 2514 thread_actions.Append (thread_action); 2515 } 2516 2517 // If a default action for all other threads wasn't mentioned 2518 // then we should stop the threads. 2519 thread_actions.SetDefaultThreadActionIfNeeded (eStateStopped, 0); 2520 2521 Error error = m_debugged_process_sp->Resume (thread_actions); 2522 if (error.Fail ()) 2523 { 2524 if (log) 2525 { 2526 log->Printf ("GDBRemoteCommunicationServer::%s vCont failed for process %" PRIu64 ": %s", 2527 __FUNCTION__, 2528 m_debugged_process_sp->GetID (), 2529 error.AsCString ()); 2530 } 2531 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 2532 } 2533 2534 if (log) 2535 log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 2536 2537 // No response required from vCont. 2538 return PacketResult::Success; 2539 } 2540 2541 GDBRemoteCommunication::PacketResult 2542 GDBRemoteCommunicationServer::Handle_QStartNoAckMode (StringExtractorGDBRemote &packet) 2543 { 2544 // Send response first before changing m_send_acks to we ack this packet 2545 PacketResult packet_result = SendOKResponse (); 2546 m_send_acks = false; 2547 return packet_result; 2548 } 2549 2550 GDBRemoteCommunication::PacketResult 2551 GDBRemoteCommunicationServer::Handle_qPlatform_mkdir (StringExtractorGDBRemote &packet) 2552 { 2553 packet.SetFilePos(::strlen("qPlatform_mkdir:")); 2554 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); 2555 if (packet.GetChar() == ',') 2556 { 2557 std::string path; 2558 packet.GetHexByteString(path); 2559 Error error = FileSystem::MakeDirectory(path.c_str(), mode); 2560 if (error.Success()) 2561 return SendPacketNoLock ("OK", 2); 2562 else 2563 return SendErrorResponse(error.GetError()); 2564 } 2565 return SendErrorResponse(20); 2566 } 2567 2568 GDBRemoteCommunication::PacketResult 2569 GDBRemoteCommunicationServer::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet) 2570 { 2571 packet.SetFilePos(::strlen("qPlatform_chmod:")); 2572 2573 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); 2574 if (packet.GetChar() == ',') 2575 { 2576 std::string path; 2577 packet.GetHexByteString(path); 2578 Error error = FileSystem::SetFilePermissions(path.c_str(), mode); 2579 if (error.Success()) 2580 return SendPacketNoLock ("OK", 2); 2581 else 2582 return SendErrorResponse(error.GetError()); 2583 } 2584 return SendErrorResponse(19); 2585 } 2586 2587 GDBRemoteCommunication::PacketResult 2588 GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet) 2589 { 2590 packet.SetFilePos(::strlen("vFile:open:")); 2591 std::string path; 2592 packet.GetHexByteStringTerminatedBy(path,','); 2593 if (!path.empty()) 2594 { 2595 if (packet.GetChar() == ',') 2596 { 2597 uint32_t flags = packet.GetHexMaxU32(false, 0); 2598 if (packet.GetChar() == ',') 2599 { 2600 mode_t mode = packet.GetHexMaxU32(false, 0600); 2601 Error error; 2602 int fd = ::open (path.c_str(), flags, mode); 2603 const int save_errno = fd == -1 ? errno : 0; 2604 StreamString response; 2605 response.PutChar('F'); 2606 response.Printf("%i", fd); 2607 if (save_errno) 2608 response.Printf(",%i", save_errno); 2609 return SendPacketNoLock(response.GetData(), response.GetSize()); 2610 } 2611 } 2612 } 2613 return SendErrorResponse(18); 2614 } 2615 2616 GDBRemoteCommunication::PacketResult 2617 GDBRemoteCommunicationServer::Handle_vFile_Close (StringExtractorGDBRemote &packet) 2618 { 2619 packet.SetFilePos(::strlen("vFile:close:")); 2620 int fd = packet.GetS32(-1); 2621 Error error; 2622 int err = -1; 2623 int save_errno = 0; 2624 if (fd >= 0) 2625 { 2626 err = close(fd); 2627 save_errno = err == -1 ? errno : 0; 2628 } 2629 else 2630 { 2631 save_errno = EINVAL; 2632 } 2633 StreamString response; 2634 response.PutChar('F'); 2635 response.Printf("%i", err); 2636 if (save_errno) 2637 response.Printf(",%i", save_errno); 2638 return SendPacketNoLock(response.GetData(), response.GetSize()); 2639 } 2640 2641 GDBRemoteCommunication::PacketResult 2642 GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet) 2643 { 2644 #ifdef _WIN32 2645 // Not implemented on Windows 2646 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented"); 2647 #else 2648 StreamGDBRemote response; 2649 packet.SetFilePos(::strlen("vFile:pread:")); 2650 int fd = packet.GetS32(-1); 2651 if (packet.GetChar() == ',') 2652 { 2653 uint64_t count = packet.GetU64(UINT64_MAX); 2654 if (packet.GetChar() == ',') 2655 { 2656 uint64_t offset = packet.GetU64(UINT32_MAX); 2657 if (count == UINT64_MAX) 2658 { 2659 response.Printf("F-1:%i", EINVAL); 2660 return SendPacketNoLock(response.GetData(), response.GetSize()); 2661 } 2662 2663 std::string buffer(count, 0); 2664 const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset); 2665 const int save_errno = bytes_read == -1 ? errno : 0; 2666 response.PutChar('F'); 2667 response.Printf("%zi", bytes_read); 2668 if (save_errno) 2669 response.Printf(",%i", save_errno); 2670 else 2671 { 2672 response.PutChar(';'); 2673 response.PutEscapedBytes(&buffer[0], bytes_read); 2674 } 2675 return SendPacketNoLock(response.GetData(), response.GetSize()); 2676 } 2677 } 2678 return SendErrorResponse(21); 2679 2680 #endif 2681 } 2682 2683 GDBRemoteCommunication::PacketResult 2684 GDBRemoteCommunicationServer::Handle_vFile_pWrite (StringExtractorGDBRemote &packet) 2685 { 2686 #ifdef _WIN32 2687 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pWrite() unimplemented"); 2688 #else 2689 packet.SetFilePos(::strlen("vFile:pwrite:")); 2690 2691 StreamGDBRemote response; 2692 response.PutChar('F'); 2693 2694 int fd = packet.GetU32(UINT32_MAX); 2695 if (packet.GetChar() == ',') 2696 { 2697 off_t offset = packet.GetU64(UINT32_MAX); 2698 if (packet.GetChar() == ',') 2699 { 2700 std::string buffer; 2701 if (packet.GetEscapedBinaryData(buffer)) 2702 { 2703 const ssize_t bytes_written = ::pwrite (fd, buffer.data(), buffer.size(), offset); 2704 const int save_errno = bytes_written == -1 ? errno : 0; 2705 response.Printf("%zi", bytes_written); 2706 if (save_errno) 2707 response.Printf(",%i", save_errno); 2708 } 2709 else 2710 { 2711 response.Printf ("-1,%i", EINVAL); 2712 } 2713 return SendPacketNoLock(response.GetData(), response.GetSize()); 2714 } 2715 } 2716 return SendErrorResponse(27); 2717 #endif 2718 } 2719 2720 GDBRemoteCommunication::PacketResult 2721 GDBRemoteCommunicationServer::Handle_vFile_Size (StringExtractorGDBRemote &packet) 2722 { 2723 packet.SetFilePos(::strlen("vFile:size:")); 2724 std::string path; 2725 packet.GetHexByteString(path); 2726 if (!path.empty()) 2727 { 2728 lldb::user_id_t retcode = FileSystem::GetFileSize(FileSpec(path.c_str(), false)); 2729 StreamString response; 2730 response.PutChar('F'); 2731 response.PutHex64(retcode); 2732 if (retcode == UINT64_MAX) 2733 { 2734 response.PutChar(','); 2735 response.PutHex64(retcode); // TODO: replace with Host::GetSyswideErrorCode() 2736 } 2737 return SendPacketNoLock(response.GetData(), response.GetSize()); 2738 } 2739 return SendErrorResponse(22); 2740 } 2741 2742 GDBRemoteCommunication::PacketResult 2743 GDBRemoteCommunicationServer::Handle_vFile_Mode (StringExtractorGDBRemote &packet) 2744 { 2745 packet.SetFilePos(::strlen("vFile:mode:")); 2746 std::string path; 2747 packet.GetHexByteString(path); 2748 if (!path.empty()) 2749 { 2750 Error error; 2751 const uint32_t mode = File::GetPermissions(path.c_str(), error); 2752 StreamString response; 2753 response.Printf("F%u", mode); 2754 if (mode == 0 || error.Fail()) 2755 response.Printf(",%i", (int)error.GetError()); 2756 return SendPacketNoLock(response.GetData(), response.GetSize()); 2757 } 2758 return SendErrorResponse(23); 2759 } 2760 2761 GDBRemoteCommunication::PacketResult 2762 GDBRemoteCommunicationServer::Handle_vFile_Exists (StringExtractorGDBRemote &packet) 2763 { 2764 packet.SetFilePos(::strlen("vFile:exists:")); 2765 std::string path; 2766 packet.GetHexByteString(path); 2767 if (!path.empty()) 2768 { 2769 bool retcode = FileSystem::GetFileExists(FileSpec(path.c_str(), false)); 2770 StreamString response; 2771 response.PutChar('F'); 2772 response.PutChar(','); 2773 if (retcode) 2774 response.PutChar('1'); 2775 else 2776 response.PutChar('0'); 2777 return SendPacketNoLock(response.GetData(), response.GetSize()); 2778 } 2779 return SendErrorResponse(24); 2780 } 2781 2782 GDBRemoteCommunication::PacketResult 2783 GDBRemoteCommunicationServer::Handle_vFile_symlink (StringExtractorGDBRemote &packet) 2784 { 2785 packet.SetFilePos(::strlen("vFile:symlink:")); 2786 std::string dst, src; 2787 packet.GetHexByteStringTerminatedBy(dst, ','); 2788 packet.GetChar(); // Skip ',' char 2789 packet.GetHexByteString(src); 2790 Error error = FileSystem::Symlink(src.c_str(), dst.c_str()); 2791 StreamString response; 2792 response.Printf("F%u,%u", error.GetError(), error.GetError()); 2793 return SendPacketNoLock(response.GetData(), response.GetSize()); 2794 } 2795 2796 GDBRemoteCommunication::PacketResult 2797 GDBRemoteCommunicationServer::Handle_vFile_unlink (StringExtractorGDBRemote &packet) 2798 { 2799 packet.SetFilePos(::strlen("vFile:unlink:")); 2800 std::string path; 2801 packet.GetHexByteString(path); 2802 Error error = FileSystem::Unlink(path.c_str()); 2803 StreamString response; 2804 response.Printf("F%u,%u", error.GetError(), error.GetError()); 2805 return SendPacketNoLock(response.GetData(), response.GetSize()); 2806 } 2807 2808 GDBRemoteCommunication::PacketResult 2809 GDBRemoteCommunicationServer::Handle_qPlatform_shell (StringExtractorGDBRemote &packet) 2810 { 2811 packet.SetFilePos(::strlen("qPlatform_shell:")); 2812 std::string path; 2813 std::string working_dir; 2814 packet.GetHexByteStringTerminatedBy(path,','); 2815 if (!path.empty()) 2816 { 2817 if (packet.GetChar() == ',') 2818 { 2819 // FIXME: add timeout to qPlatform_shell packet 2820 // uint32_t timeout = packet.GetHexMaxU32(false, 32); 2821 uint32_t timeout = 10; 2822 if (packet.GetChar() == ',') 2823 packet.GetHexByteString(working_dir); 2824 int status, signo; 2825 std::string output; 2826 Error err = Host::RunShellCommand(path.c_str(), 2827 working_dir.empty() ? NULL : working_dir.c_str(), 2828 &status, &signo, &output, timeout); 2829 StreamGDBRemote response; 2830 if (err.Fail()) 2831 { 2832 response.PutCString("F,"); 2833 response.PutHex32(UINT32_MAX); 2834 } 2835 else 2836 { 2837 response.PutCString("F,"); 2838 response.PutHex32(status); 2839 response.PutChar(','); 2840 response.PutHex32(signo); 2841 response.PutChar(','); 2842 response.PutEscapedBytes(output.c_str(), output.size()); 2843 } 2844 return SendPacketNoLock(response.GetData(), response.GetSize()); 2845 } 2846 } 2847 return SendErrorResponse(24); 2848 } 2849 2850 void 2851 GDBRemoteCommunicationServer::SetCurrentThreadID (lldb::tid_t tid) 2852 { 2853 assert (IsGdbServer () && "SetCurrentThreadID() called when not GdbServer code"); 2854 2855 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); 2856 if (log) 2857 log->Printf ("GDBRemoteCommunicationServer::%s setting current thread id to %" PRIu64, __FUNCTION__, tid); 2858 2859 m_current_tid = tid; 2860 if (m_debugged_process_sp) 2861 m_debugged_process_sp->SetCurrentThreadID (m_current_tid); 2862 } 2863 2864 void 2865 GDBRemoteCommunicationServer::SetContinueThreadID (lldb::tid_t tid) 2866 { 2867 assert (IsGdbServer () && "SetContinueThreadID() called when not GdbServer code"); 2868 2869 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); 2870 if (log) 2871 log->Printf ("GDBRemoteCommunicationServer::%s setting continue thread id to %" PRIu64, __FUNCTION__, tid); 2872 2873 m_continue_tid = tid; 2874 } 2875 2876 GDBRemoteCommunication::PacketResult 2877 GDBRemoteCommunicationServer::Handle_stop_reason (StringExtractorGDBRemote &packet) 2878 { 2879 // Handle the $? gdbremote command. 2880 if (!IsGdbServer ()) 2881 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_stop_reason() unimplemented"); 2882 2883 // If no process, indicate error 2884 if (!m_debugged_process_sp) 2885 return SendErrorResponse (02); 2886 2887 return SendStopReasonForState (m_debugged_process_sp->GetState (), true); 2888 } 2889 2890 GDBRemoteCommunication::PacketResult 2891 GDBRemoteCommunicationServer::SendStopReasonForState (lldb::StateType process_state, bool flush_on_exit) 2892 { 2893 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 2894 2895 switch (process_state) 2896 { 2897 case eStateAttaching: 2898 case eStateLaunching: 2899 case eStateRunning: 2900 case eStateStepping: 2901 case eStateDetached: 2902 // NOTE: gdb protocol doc looks like it should return $OK 2903 // when everything is running (i.e. no stopped result). 2904 return PacketResult::Success; // Ignore 2905 2906 case eStateSuspended: 2907 case eStateStopped: 2908 case eStateCrashed: 2909 { 2910 lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); 2911 // Make sure we set the current thread so g and p packets return 2912 // the data the gdb will expect. 2913 SetCurrentThreadID (tid); 2914 return SendStopReplyPacketForThread (tid); 2915 } 2916 2917 case eStateInvalid: 2918 case eStateUnloaded: 2919 case eStateExited: 2920 if (flush_on_exit) 2921 FlushInferiorOutput (); 2922 return SendWResponse(m_debugged_process_sp.get()); 2923 2924 default: 2925 if (log) 2926 { 2927 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", current state reporting not handled: %s", 2928 __FUNCTION__, 2929 m_debugged_process_sp->GetID (), 2930 StateAsCString (process_state)); 2931 } 2932 break; 2933 } 2934 2935 return SendErrorResponse (0); 2936 } 2937 2938 GDBRemoteCommunication::PacketResult 2939 GDBRemoteCommunicationServer::Handle_vFile_Stat (StringExtractorGDBRemote &packet) 2940 { 2941 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_Stat() unimplemented"); 2942 } 2943 2944 GDBRemoteCommunication::PacketResult 2945 GDBRemoteCommunicationServer::Handle_vFile_MD5 (StringExtractorGDBRemote &packet) 2946 { 2947 packet.SetFilePos(::strlen("vFile:MD5:")); 2948 std::string path; 2949 packet.GetHexByteString(path); 2950 if (!path.empty()) 2951 { 2952 uint64_t a,b; 2953 StreamGDBRemote response; 2954 if (FileSystem::CalculateMD5(FileSpec(path.c_str(), false), a, b) == false) 2955 { 2956 response.PutCString("F,"); 2957 response.PutCString("x"); 2958 } 2959 else 2960 { 2961 response.PutCString("F,"); 2962 response.PutHex64(a); 2963 response.PutHex64(b); 2964 } 2965 return SendPacketNoLock(response.GetData(), response.GetSize()); 2966 } 2967 return SendErrorResponse(25); 2968 } 2969 2970 GDBRemoteCommunication::PacketResult 2971 GDBRemoteCommunicationServer::Handle_qRegisterInfo (StringExtractorGDBRemote &packet) 2972 { 2973 // Ensure we're llgs. 2974 if (!IsGdbServer()) 2975 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qRegisterInfo() unimplemented"); 2976 2977 // Fail if we don't have a current process. 2978 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 2979 return SendErrorResponse (68); 2980 2981 // Ensure we have a thread. 2982 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadAtIndex (0)); 2983 if (!thread_sp) 2984 return SendErrorResponse (69); 2985 2986 // Get the register context for the first thread. 2987 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 2988 if (!reg_context_sp) 2989 return SendErrorResponse (69); 2990 2991 // Parse out the register number from the request. 2992 packet.SetFilePos (strlen("qRegisterInfo")); 2993 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 2994 if (reg_index == std::numeric_limits<uint32_t>::max ()) 2995 return SendErrorResponse (69); 2996 2997 // Return the end of registers response if we've iterated one past the end of the register set. 2998 if (reg_index >= reg_context_sp->GetUserRegisterCount ()) 2999 return SendErrorResponse (69); 3000 3001 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3002 if (!reg_info) 3003 return SendErrorResponse (69); 3004 3005 // Build the reginfos response. 3006 StreamGDBRemote response; 3007 3008 response.PutCString ("name:"); 3009 response.PutCString (reg_info->name); 3010 response.PutChar (';'); 3011 3012 if (reg_info->alt_name && reg_info->alt_name[0]) 3013 { 3014 response.PutCString ("alt-name:"); 3015 response.PutCString (reg_info->alt_name); 3016 response.PutChar (';'); 3017 } 3018 3019 response.Printf ("bitsize:%" PRIu32 ";offset:%" PRIu32 ";", reg_info->byte_size * 8, reg_info->byte_offset); 3020 3021 switch (reg_info->encoding) 3022 { 3023 case eEncodingUint: response.PutCString ("encoding:uint;"); break; 3024 case eEncodingSint: response.PutCString ("encoding:sint;"); break; 3025 case eEncodingIEEE754: response.PutCString ("encoding:ieee754;"); break; 3026 case eEncodingVector: response.PutCString ("encoding:vector;"); break; 3027 default: break; 3028 } 3029 3030 switch (reg_info->format) 3031 { 3032 case eFormatBinary: response.PutCString ("format:binary;"); break; 3033 case eFormatDecimal: response.PutCString ("format:decimal;"); break; 3034 case eFormatHex: response.PutCString ("format:hex;"); break; 3035 case eFormatFloat: response.PutCString ("format:float;"); break; 3036 case eFormatVectorOfSInt8: response.PutCString ("format:vector-sint8;"); break; 3037 case eFormatVectorOfUInt8: response.PutCString ("format:vector-uint8;"); break; 3038 case eFormatVectorOfSInt16: response.PutCString ("format:vector-sint16;"); break; 3039 case eFormatVectorOfUInt16: response.PutCString ("format:vector-uint16;"); break; 3040 case eFormatVectorOfSInt32: response.PutCString ("format:vector-sint32;"); break; 3041 case eFormatVectorOfUInt32: response.PutCString ("format:vector-uint32;"); break; 3042 case eFormatVectorOfFloat32: response.PutCString ("format:vector-float32;"); break; 3043 case eFormatVectorOfUInt128: response.PutCString ("format:vector-uint128;"); break; 3044 default: break; 3045 }; 3046 3047 const char *const register_set_name = reg_context_sp->GetRegisterSetNameForRegisterAtIndex(reg_index); 3048 if (register_set_name) 3049 { 3050 response.PutCString ("set:"); 3051 response.PutCString (register_set_name); 3052 response.PutChar (';'); 3053 } 3054 3055 if (reg_info->kinds[RegisterKind::eRegisterKindGCC] != LLDB_INVALID_REGNUM) 3056 response.Printf ("gcc:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindGCC]); 3057 3058 if (reg_info->kinds[RegisterKind::eRegisterKindDWARF] != LLDB_INVALID_REGNUM) 3059 response.Printf ("dwarf:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindDWARF]); 3060 3061 switch (reg_info->kinds[RegisterKind::eRegisterKindGeneric]) 3062 { 3063 case LLDB_REGNUM_GENERIC_PC: response.PutCString("generic:pc;"); break; 3064 case LLDB_REGNUM_GENERIC_SP: response.PutCString("generic:sp;"); break; 3065 case LLDB_REGNUM_GENERIC_FP: response.PutCString("generic:fp;"); break; 3066 case LLDB_REGNUM_GENERIC_RA: response.PutCString("generic:ra;"); break; 3067 case LLDB_REGNUM_GENERIC_FLAGS: response.PutCString("generic:flags;"); break; 3068 case LLDB_REGNUM_GENERIC_ARG1: response.PutCString("generic:arg1;"); break; 3069 case LLDB_REGNUM_GENERIC_ARG2: response.PutCString("generic:arg2;"); break; 3070 case LLDB_REGNUM_GENERIC_ARG3: response.PutCString("generic:arg3;"); break; 3071 case LLDB_REGNUM_GENERIC_ARG4: response.PutCString("generic:arg4;"); break; 3072 case LLDB_REGNUM_GENERIC_ARG5: response.PutCString("generic:arg5;"); break; 3073 case LLDB_REGNUM_GENERIC_ARG6: response.PutCString("generic:arg6;"); break; 3074 case LLDB_REGNUM_GENERIC_ARG7: response.PutCString("generic:arg7;"); break; 3075 case LLDB_REGNUM_GENERIC_ARG8: response.PutCString("generic:arg8;"); break; 3076 default: break; 3077 } 3078 3079 if (reg_info->value_regs && reg_info->value_regs[0] != LLDB_INVALID_REGNUM) 3080 { 3081 response.PutCString ("container-regs:"); 3082 int i = 0; 3083 for (const uint32_t *reg_num = reg_info->value_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) 3084 { 3085 if (i > 0) 3086 response.PutChar (','); 3087 response.Printf ("%" PRIx32, *reg_num); 3088 } 3089 response.PutChar (';'); 3090 } 3091 3092 if (reg_info->invalidate_regs && reg_info->invalidate_regs[0]) 3093 { 3094 response.PutCString ("invalidate-regs:"); 3095 int i = 0; 3096 for (const uint32_t *reg_num = reg_info->invalidate_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) 3097 { 3098 if (i > 0) 3099 response.PutChar (','); 3100 response.Printf ("%" PRIx32, *reg_num); 3101 } 3102 response.PutChar (';'); 3103 } 3104 3105 return SendPacketNoLock(response.GetData(), response.GetSize()); 3106 } 3107 3108 GDBRemoteCommunication::PacketResult 3109 GDBRemoteCommunicationServer::Handle_qfThreadInfo (StringExtractorGDBRemote &packet) 3110 { 3111 // Ensure we're llgs. 3112 if (!IsGdbServer()) 3113 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qfThreadInfo() unimplemented"); 3114 3115 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3116 3117 // Fail if we don't have a current process. 3118 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3119 { 3120 if (log) 3121 log->Printf ("GDBRemoteCommunicationServer::%s() no process (%s), returning OK", __FUNCTION__, m_debugged_process_sp ? "invalid process id" : "null m_debugged_process_sp"); 3122 return SendOKResponse (); 3123 } 3124 3125 StreamGDBRemote response; 3126 response.PutChar ('m'); 3127 3128 if (log) 3129 log->Printf ("GDBRemoteCommunicationServer::%s() starting thread iteration", __FUNCTION__); 3130 3131 NativeThreadProtocolSP thread_sp; 3132 uint32_t thread_index; 3133 for (thread_index = 0, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); 3134 thread_sp; 3135 ++thread_index, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index)) 3136 { 3137 if (log) 3138 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); 3139 if (thread_index > 0) 3140 response.PutChar(','); 3141 response.Printf ("%" PRIx64, thread_sp->GetID ()); 3142 } 3143 3144 if (log) 3145 log->Printf ("GDBRemoteCommunicationServer::%s() finished thread iteration", __FUNCTION__); 3146 3147 return SendPacketNoLock(response.GetData(), response.GetSize()); 3148 } 3149 3150 GDBRemoteCommunication::PacketResult 3151 GDBRemoteCommunicationServer::Handle_qsThreadInfo (StringExtractorGDBRemote &packet) 3152 { 3153 // Ensure we're llgs. 3154 if (!IsGdbServer()) 3155 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_qsThreadInfo() unimplemented"); 3156 3157 // FIXME for now we return the full thread list in the initial packet and always do nothing here. 3158 return SendPacketNoLock ("l", 1); 3159 } 3160 3161 GDBRemoteCommunication::PacketResult 3162 GDBRemoteCommunicationServer::Handle_p (StringExtractorGDBRemote &packet) 3163 { 3164 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3165 3166 // Ensure we're llgs. 3167 if (!IsGdbServer()) 3168 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_p() unimplemented"); 3169 3170 // Parse out the register number from the request. 3171 packet.SetFilePos (strlen("p")); 3172 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3173 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3174 { 3175 if (log) 3176 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 3177 return SendErrorResponse (0x15); 3178 } 3179 3180 // Get the thread to use. 3181 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 3182 if (!thread_sp) 3183 { 3184 if (log) 3185 log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available", __FUNCTION__); 3186 return SendErrorResponse (0x15); 3187 } 3188 3189 // Get the thread's register context. 3190 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3191 if (!reg_context_sp) 3192 { 3193 if (log) 3194 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 ()); 3195 return SendErrorResponse (0x15); 3196 } 3197 3198 // Return the end of registers response if we've iterated one past the end of the register set. 3199 if (reg_index >= reg_context_sp->GetUserRegisterCount ()) 3200 { 3201 if (log) 3202 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetUserRegisterCount ()); 3203 return SendErrorResponse (0x15); 3204 } 3205 3206 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3207 if (!reg_info) 3208 { 3209 if (log) 3210 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); 3211 return SendErrorResponse (0x15); 3212 } 3213 3214 // Build the reginfos response. 3215 StreamGDBRemote response; 3216 3217 // Retrieve the value 3218 RegisterValue reg_value; 3219 Error error = reg_context_sp->ReadRegister (reg_info, reg_value); 3220 if (error.Fail ()) 3221 { 3222 if (log) 3223 log->Printf ("GDBRemoteCommunicationServer::%s failed, read of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); 3224 return SendErrorResponse (0x15); 3225 } 3226 3227 const uint8_t *const data = reinterpret_cast<const uint8_t*> (reg_value.GetBytes ()); 3228 if (!data) 3229 { 3230 if (log) 3231 log->Printf ("GDBRemoteCommunicationServer::%s failed to get data bytes from requested register %" PRIu32, __FUNCTION__, reg_index); 3232 return SendErrorResponse (0x15); 3233 } 3234 3235 // FIXME flip as needed to get data in big/little endian format for this host. 3236 for (uint32_t i = 0; i < reg_value.GetByteSize (); ++i) 3237 response.PutHex8 (data[i]); 3238 3239 return SendPacketNoLock (response.GetData (), response.GetSize ()); 3240 } 3241 3242 GDBRemoteCommunication::PacketResult 3243 GDBRemoteCommunicationServer::Handle_P (StringExtractorGDBRemote &packet) 3244 { 3245 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3246 3247 // Ensure we're llgs. 3248 if (!IsGdbServer()) 3249 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_P() unimplemented"); 3250 3251 // Ensure there is more content. 3252 if (packet.GetBytesLeft () < 1) 3253 return SendIllFormedResponse (packet, "Empty P packet"); 3254 3255 // Parse out the register number from the request. 3256 packet.SetFilePos (strlen("P")); 3257 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3258 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3259 { 3260 if (log) 3261 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 3262 return SendErrorResponse (0x29); 3263 } 3264 3265 // Note debugserver would send an E30 here. 3266 if ((packet.GetBytesLeft () < 1) || (packet.GetChar () != '=')) 3267 return SendIllFormedResponse (packet, "P packet missing '=' char after register number"); 3268 3269 // Get process architecture. 3270 ArchSpec process_arch; 3271 if (!m_debugged_process_sp || !m_debugged_process_sp->GetArchitecture (process_arch)) 3272 { 3273 if (log) 3274 log->Printf ("GDBRemoteCommunicationServer::%s failed to retrieve inferior architecture", __FUNCTION__); 3275 return SendErrorResponse (0x49); 3276 } 3277 3278 // Parse out the value. 3279 const uint64_t raw_value = packet.GetHexMaxU64 (process_arch.GetByteOrder () == lldb::eByteOrderLittle, std::numeric_limits<uint64_t>::max ()); 3280 3281 // Get the thread to use. 3282 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 3283 if (!thread_sp) 3284 { 3285 if (log) 3286 log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available (thread index 0)", __FUNCTION__); 3287 return SendErrorResponse (0x28); 3288 } 3289 3290 // Get the thread's register context. 3291 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3292 if (!reg_context_sp) 3293 { 3294 if (log) 3295 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 ()); 3296 return SendErrorResponse (0x15); 3297 } 3298 3299 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3300 if (!reg_info) 3301 { 3302 if (log) 3303 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); 3304 return SendErrorResponse (0x48); 3305 } 3306 3307 // Return the end of registers response if we've iterated one past the end of the register set. 3308 if (reg_index >= reg_context_sp->GetUserRegisterCount ()) 3309 { 3310 if (log) 3311 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetUserRegisterCount ()); 3312 return SendErrorResponse (0x47); 3313 } 3314 3315 3316 // Build the reginfos response. 3317 StreamGDBRemote response; 3318 3319 // FIXME Could be suffixed with a thread: parameter. 3320 // That thread then needs to be fed back into the reg context retrieval above. 3321 Error error = reg_context_sp->WriteRegisterFromUnsigned (reg_info, raw_value); 3322 if (error.Fail ()) 3323 { 3324 if (log) 3325 log->Printf ("GDBRemoteCommunicationServer::%s failed, write of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); 3326 return SendErrorResponse (0x32); 3327 } 3328 3329 return SendOKResponse(); 3330 } 3331 3332 GDBRemoteCommunicationServer::PacketResult 3333 GDBRemoteCommunicationServer::Handle_H (StringExtractorGDBRemote &packet) 3334 { 3335 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3336 3337 // Ensure we're llgs. 3338 if (!IsGdbServer()) 3339 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_H() unimplemented"); 3340 3341 // Fail if we don't have a current process. 3342 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3343 { 3344 if (log) 3345 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3346 return SendErrorResponse (0x15); 3347 } 3348 3349 // Parse out which variant of $H is requested. 3350 packet.SetFilePos (strlen("H")); 3351 if (packet.GetBytesLeft () < 1) 3352 { 3353 if (log) 3354 log->Printf ("GDBRemoteCommunicationServer::%s failed, H command missing {g,c} variant", __FUNCTION__); 3355 return SendIllFormedResponse (packet, "H command missing {g,c} variant"); 3356 } 3357 3358 const char h_variant = packet.GetChar (); 3359 switch (h_variant) 3360 { 3361 case 'g': 3362 break; 3363 3364 case 'c': 3365 break; 3366 3367 default: 3368 if (log) 3369 log->Printf ("GDBRemoteCommunicationServer::%s failed, invalid $H variant %c", __FUNCTION__, h_variant); 3370 return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); 3371 } 3372 3373 // Parse out the thread number. 3374 // FIXME return a parse success/fail value. All values are valid here. 3375 const lldb::tid_t tid = packet.GetHexMaxU64 (false, std::numeric_limits<lldb::tid_t>::max ()); 3376 3377 // Ensure we have the given thread when not specifying -1 (all threads) or 0 (any thread). 3378 if (tid != LLDB_INVALID_THREAD_ID && tid != 0) 3379 { 3380 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); 3381 if (!thread_sp) 3382 { 3383 if (log) 3384 log->Printf ("GDBRemoteCommunicationServer::%s failed, tid %" PRIu64 " not found", __FUNCTION__, tid); 3385 return SendErrorResponse (0x15); 3386 } 3387 } 3388 3389 // Now switch the given thread type. 3390 switch (h_variant) 3391 { 3392 case 'g': 3393 SetCurrentThreadID (tid); 3394 break; 3395 3396 case 'c': 3397 SetContinueThreadID (tid); 3398 break; 3399 3400 default: 3401 assert (false && "unsupported $H variant - shouldn't get here"); 3402 return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); 3403 } 3404 3405 return SendOKResponse(); 3406 } 3407 3408 GDBRemoteCommunicationServer::PacketResult 3409 GDBRemoteCommunicationServer::Handle_interrupt (StringExtractorGDBRemote &packet) 3410 { 3411 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 3412 3413 // Ensure we're llgs. 3414 if (!IsGdbServer()) 3415 { 3416 // Only supported on llgs 3417 return SendUnimplementedResponse (""); 3418 } 3419 3420 // Fail if we don't have a current process. 3421 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3422 { 3423 if (log) 3424 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3425 return SendErrorResponse (0x15); 3426 } 3427 3428 // Interrupt the process. 3429 Error error = m_debugged_process_sp->Interrupt (); 3430 if (error.Fail ()) 3431 { 3432 if (log) 3433 { 3434 log->Printf ("GDBRemoteCommunicationServer::%s failed for process %" PRIu64 ": %s", 3435 __FUNCTION__, 3436 m_debugged_process_sp->GetID (), 3437 error.AsCString ()); 3438 } 3439 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 3440 } 3441 3442 if (log) 3443 log->Printf ("GDBRemoteCommunicationServer::%s stopped process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 3444 3445 // No response required from stop all. 3446 return PacketResult::Success; 3447 } 3448 3449 GDBRemoteCommunicationServer::PacketResult 3450 GDBRemoteCommunicationServer::Handle_m (StringExtractorGDBRemote &packet) 3451 { 3452 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3453 3454 // Ensure we're llgs. 3455 if (!IsGdbServer()) 3456 { 3457 // Only supported on llgs 3458 return SendUnimplementedResponse (""); 3459 } 3460 3461 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3462 { 3463 if (log) 3464 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3465 return SendErrorResponse (0x15); 3466 } 3467 3468 // Parse out the memory address. 3469 packet.SetFilePos (strlen("m")); 3470 if (packet.GetBytesLeft() < 1) 3471 return SendIllFormedResponse(packet, "Too short m packet"); 3472 3473 // Read the address. Punting on validation. 3474 // FIXME replace with Hex U64 read with no default value that fails on failed read. 3475 const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); 3476 3477 // Validate comma. 3478 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) 3479 return SendIllFormedResponse(packet, "Comma sep missing in m packet"); 3480 3481 // Get # bytes to read. 3482 if (packet.GetBytesLeft() < 1) 3483 return SendIllFormedResponse(packet, "Length missing in m packet"); 3484 3485 const uint64_t byte_count = packet.GetHexMaxU64(false, 0); 3486 if (byte_count == 0) 3487 { 3488 if (log) 3489 log->Printf ("GDBRemoteCommunicationServer::%s nothing to read: zero-length packet", __FUNCTION__); 3490 return PacketResult::Success; 3491 } 3492 3493 // Allocate the response buffer. 3494 std::string buf(byte_count, '\0'); 3495 if (buf.empty()) 3496 return SendErrorResponse (0x78); 3497 3498 3499 // Retrieve the process memory. 3500 lldb::addr_t bytes_read = 0; 3501 lldb_private::Error error = m_debugged_process_sp->ReadMemory (read_addr, &buf[0], byte_count, bytes_read); 3502 if (error.Fail ()) 3503 { 3504 if (log) 3505 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to read. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, error.AsCString ()); 3506 return SendErrorResponse (0x08); 3507 } 3508 3509 if (bytes_read == 0) 3510 { 3511 if (log) 3512 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); 3513 return SendErrorResponse (0x08); 3514 } 3515 3516 StreamGDBRemote response; 3517 for (lldb::addr_t i = 0; i < bytes_read; ++i) 3518 response.PutHex8(buf[i]); 3519 3520 return SendPacketNoLock(response.GetData(), response.GetSize()); 3521 } 3522 3523 GDBRemoteCommunication::PacketResult 3524 GDBRemoteCommunicationServer::Handle_QSetDetachOnError (StringExtractorGDBRemote &packet) 3525 { 3526 packet.SetFilePos(::strlen ("QSetDetachOnError:")); 3527 if (packet.GetU32(0)) 3528 m_process_launch_info.GetFlags().Set (eLaunchFlagDetachOnError); 3529 else 3530 m_process_launch_info.GetFlags().Clear (eLaunchFlagDetachOnError); 3531 return SendOKResponse (); 3532 } 3533 3534 GDBRemoteCommunicationServer::PacketResult 3535 GDBRemoteCommunicationServer::Handle_M (StringExtractorGDBRemote &packet) 3536 { 3537 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3538 3539 // Ensure we're llgs. 3540 if (!IsGdbServer()) 3541 { 3542 // Only supported on llgs 3543 return SendUnimplementedResponse (""); 3544 } 3545 3546 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3547 { 3548 if (log) 3549 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3550 return SendErrorResponse (0x15); 3551 } 3552 3553 // Parse out the memory address. 3554 packet.SetFilePos (strlen("M")); 3555 if (packet.GetBytesLeft() < 1) 3556 return SendIllFormedResponse(packet, "Too short M packet"); 3557 3558 // Read the address. Punting on validation. 3559 // FIXME replace with Hex U64 read with no default value that fails on failed read. 3560 const lldb::addr_t write_addr = packet.GetHexMaxU64(false, 0); 3561 3562 // Validate comma. 3563 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) 3564 return SendIllFormedResponse(packet, "Comma sep missing in M packet"); 3565 3566 // Get # bytes to read. 3567 if (packet.GetBytesLeft() < 1) 3568 return SendIllFormedResponse(packet, "Length missing in M packet"); 3569 3570 const uint64_t byte_count = packet.GetHexMaxU64(false, 0); 3571 if (byte_count == 0) 3572 { 3573 if (log) 3574 log->Printf ("GDBRemoteCommunicationServer::%s nothing to write: zero-length packet", __FUNCTION__); 3575 return PacketResult::Success; 3576 } 3577 3578 // Validate colon. 3579 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ':')) 3580 return SendIllFormedResponse(packet, "Comma sep missing in M packet after byte length"); 3581 3582 // Allocate the conversion buffer. 3583 std::vector<uint8_t> buf(byte_count, 0); 3584 if (buf.empty()) 3585 return SendErrorResponse (0x78); 3586 3587 // Convert the hex memory write contents to bytes. 3588 StreamGDBRemote response; 3589 const uint64_t convert_count = static_cast<uint64_t> (packet.GetHexBytes (&buf[0], byte_count, 0)); 3590 if (convert_count != byte_count) 3591 { 3592 if (log) 3593 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); 3594 return SendIllFormedResponse (packet, "M content byte length specified did not match hex-encoded content length"); 3595 } 3596 3597 // Write the process memory. 3598 lldb::addr_t bytes_written = 0; 3599 lldb_private::Error error = m_debugged_process_sp->WriteMemory (write_addr, &buf[0], byte_count, bytes_written); 3600 if (error.Fail ()) 3601 { 3602 if (log) 3603 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to write. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, error.AsCString ()); 3604 return SendErrorResponse (0x09); 3605 } 3606 3607 if (bytes_written == 0) 3608 { 3609 if (log) 3610 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); 3611 return SendErrorResponse (0x09); 3612 } 3613 3614 return SendOKResponse (); 3615 } 3616 3617 GDBRemoteCommunicationServer::PacketResult 3618 GDBRemoteCommunicationServer::Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet) 3619 { 3620 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3621 3622 // We don't support if we're not llgs. 3623 if (!IsGdbServer()) 3624 return SendUnimplementedResponse (""); 3625 3626 // Currently only the NativeProcessProtocol knows if it can handle a qMemoryRegionInfoSupported 3627 // request, but we're not guaranteed to be attached to a process. For now we'll assume the 3628 // client only asks this when a process is being debugged. 3629 3630 // Ensure we have a process running; otherwise, we can't figure this out 3631 // since we won't have a NativeProcessProtocol. 3632 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3633 { 3634 if (log) 3635 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3636 return SendErrorResponse (0x15); 3637 } 3638 3639 // Test if we can get any region back when asking for the region around NULL. 3640 MemoryRegionInfo region_info; 3641 const Error error = m_debugged_process_sp->GetMemoryRegionInfo (0, region_info); 3642 if (error.Fail ()) 3643 { 3644 // We don't support memory region info collection for this NativeProcessProtocol. 3645 return SendUnimplementedResponse (""); 3646 } 3647 3648 return SendOKResponse(); 3649 } 3650 3651 GDBRemoteCommunicationServer::PacketResult 3652 GDBRemoteCommunicationServer::Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet) 3653 { 3654 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3655 3656 // We don't support if we're not llgs. 3657 if (!IsGdbServer()) 3658 return SendUnimplementedResponse (""); 3659 3660 // Ensure we have a process. 3661 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3662 { 3663 if (log) 3664 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3665 return SendErrorResponse (0x15); 3666 } 3667 3668 // Parse out the memory address. 3669 packet.SetFilePos (strlen("qMemoryRegionInfo:")); 3670 if (packet.GetBytesLeft() < 1) 3671 return SendIllFormedResponse(packet, "Too short qMemoryRegionInfo: packet"); 3672 3673 // Read the address. Punting on validation. 3674 const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); 3675 3676 StreamGDBRemote response; 3677 3678 // Get the memory region info for the target address. 3679 MemoryRegionInfo region_info; 3680 const Error error = m_debugged_process_sp->GetMemoryRegionInfo (read_addr, region_info); 3681 if (error.Fail ()) 3682 { 3683 // Return the error message. 3684 3685 response.PutCString ("error:"); 3686 response.PutCStringAsRawHex8 (error.AsCString ()); 3687 response.PutChar (';'); 3688 } 3689 else 3690 { 3691 // Range start and size. 3692 response.Printf ("start:%" PRIx64 ";size:%" PRIx64 ";", region_info.GetRange ().GetRangeBase (), region_info.GetRange ().GetByteSize ()); 3693 3694 // Permissions. 3695 if (region_info.GetReadable () || 3696 region_info.GetWritable () || 3697 region_info.GetExecutable ()) 3698 { 3699 // Write permissions info. 3700 response.PutCString ("permissions:"); 3701 3702 if (region_info.GetReadable ()) 3703 response.PutChar ('r'); 3704 if (region_info.GetWritable ()) 3705 response.PutChar('w'); 3706 if (region_info.GetExecutable()) 3707 response.PutChar ('x'); 3708 3709 response.PutChar (';'); 3710 } 3711 } 3712 3713 return SendPacketNoLock(response.GetData(), response.GetSize()); 3714 } 3715 3716 GDBRemoteCommunicationServer::PacketResult 3717 GDBRemoteCommunicationServer::Handle_Z (StringExtractorGDBRemote &packet) 3718 { 3719 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); 3720 3721 // We don't support if we're not llgs. 3722 if (!IsGdbServer()) 3723 return SendUnimplementedResponse (""); 3724 3725 // Ensure we have a process. 3726 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3727 { 3728 if (log) 3729 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3730 return SendErrorResponse (0x15); 3731 } 3732 3733 // Parse out software or hardware breakpoint requested. 3734 packet.SetFilePos (strlen("Z")); 3735 if (packet.GetBytesLeft() < 1) 3736 return SendIllFormedResponse(packet, "Too short Z packet, missing software/hardware specifier"); 3737 3738 bool want_breakpoint = true; 3739 bool want_hardware = false; 3740 3741 const char breakpoint_type_char = packet.GetChar (); 3742 switch (breakpoint_type_char) 3743 { 3744 case '0': want_hardware = false; want_breakpoint = true; break; 3745 case '1': want_hardware = true; want_breakpoint = true; break; 3746 case '2': want_breakpoint = false; break; 3747 case '3': want_breakpoint = false; break; 3748 default: 3749 return SendIllFormedResponse(packet, "Z packet had invalid software/hardware specifier"); 3750 3751 } 3752 3753 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3754 return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after breakpoint type"); 3755 3756 // FIXME implement watchpoint support. 3757 if (!want_breakpoint) 3758 return SendUnimplementedResponse ("watchpoint support not yet implemented"); 3759 3760 // Parse out the breakpoint address. 3761 if (packet.GetBytesLeft() < 1) 3762 return SendIllFormedResponse(packet, "Too short Z packet, missing address"); 3763 const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0); 3764 3765 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3766 return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after address"); 3767 3768 // Parse out the breakpoint kind (i.e. size hint for opcode size). 3769 const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3770 if (kind == std::numeric_limits<uint32_t>::max ()) 3771 return SendIllFormedResponse(packet, "Malformed Z packet, failed to parse kind argument"); 3772 3773 if (want_breakpoint) 3774 { 3775 // Try to set the breakpoint. 3776 const Error error = m_debugged_process_sp->SetBreakpoint (breakpoint_addr, kind, want_hardware); 3777 if (error.Success ()) 3778 return SendOKResponse (); 3779 else 3780 { 3781 if (log) 3782 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to set breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 3783 return SendErrorResponse (0x09); 3784 } 3785 } 3786 3787 // FIXME fix up after watchpoints are handled. 3788 return SendUnimplementedResponse (""); 3789 } 3790 3791 GDBRemoteCommunicationServer::PacketResult 3792 GDBRemoteCommunicationServer::Handle_z (StringExtractorGDBRemote &packet) 3793 { 3794 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); 3795 3796 // We don't support if we're not llgs. 3797 if (!IsGdbServer()) 3798 return SendUnimplementedResponse (""); 3799 3800 // Ensure we have a process. 3801 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3802 { 3803 if (log) 3804 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3805 return SendErrorResponse (0x15); 3806 } 3807 3808 // Parse out software or hardware breakpoint requested. 3809 packet.SetFilePos (strlen("z")); 3810 if (packet.GetBytesLeft() < 1) 3811 return SendIllFormedResponse(packet, "Too short z packet, missing software/hardware specifier"); 3812 3813 bool want_breakpoint = true; 3814 3815 const char breakpoint_type_char = packet.GetChar (); 3816 switch (breakpoint_type_char) 3817 { 3818 case '0': want_breakpoint = true; break; 3819 case '1': want_breakpoint = true; break; 3820 case '2': want_breakpoint = false; break; 3821 case '3': want_breakpoint = false; break; 3822 default: 3823 return SendIllFormedResponse(packet, "z packet had invalid software/hardware specifier"); 3824 3825 } 3826 3827 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3828 return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after breakpoint type"); 3829 3830 // FIXME implement watchpoint support. 3831 if (!want_breakpoint) 3832 return SendUnimplementedResponse ("watchpoint support not yet implemented"); 3833 3834 // Parse out the breakpoint address. 3835 if (packet.GetBytesLeft() < 1) 3836 return SendIllFormedResponse(packet, "Too short z packet, missing address"); 3837 const lldb::addr_t breakpoint_addr = packet.GetHexMaxU64(false, 0); 3838 3839 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3840 return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after address"); 3841 3842 // Parse out the breakpoint kind (i.e. size hint for opcode size). 3843 const uint32_t kind = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3844 if (kind == std::numeric_limits<uint32_t>::max ()) 3845 return SendIllFormedResponse(packet, "Malformed z packet, failed to parse kind argument"); 3846 3847 if (want_breakpoint) 3848 { 3849 // Try to clear the breakpoint. 3850 const Error error = m_debugged_process_sp->RemoveBreakpoint (breakpoint_addr); 3851 if (error.Success ()) 3852 return SendOKResponse (); 3853 else 3854 { 3855 if (log) 3856 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to remove breakpoint: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 3857 return SendErrorResponse (0x09); 3858 } 3859 } 3860 3861 // FIXME fix up after watchpoints are handled. 3862 return SendUnimplementedResponse (""); 3863 } 3864 3865 GDBRemoteCommunicationServer::PacketResult 3866 GDBRemoteCommunicationServer::Handle_s (StringExtractorGDBRemote &packet) 3867 { 3868 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 3869 3870 // We don't support if we're not llgs. 3871 if (!IsGdbServer()) 3872 return SendUnimplementedResponse (""); 3873 3874 // Ensure we have a process. 3875 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3876 { 3877 if (log) 3878 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3879 return SendErrorResponse (0x32); 3880 } 3881 3882 // We first try to use a continue thread id. If any one or any all set, use the current thread. 3883 // Bail out if we don't have a thread id. 3884 lldb::tid_t tid = GetContinueThreadID (); 3885 if (tid == 0 || tid == LLDB_INVALID_THREAD_ID) 3886 tid = GetCurrentThreadID (); 3887 if (tid == LLDB_INVALID_THREAD_ID) 3888 return SendErrorResponse (0x33); 3889 3890 // Double check that we have such a thread. 3891 // TODO investigate: on MacOSX we might need to do an UpdateThreads () here. 3892 NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetThreadByID (tid); 3893 if (!thread_sp || thread_sp->GetID () != tid) 3894 return SendErrorResponse (0x33); 3895 3896 // Create the step action for the given thread. 3897 lldb_private::ResumeAction action = { tid, eStateStepping, 0 }; 3898 3899 // Setup the actions list. 3900 lldb_private::ResumeActionList actions; 3901 actions.Append (action); 3902 3903 // All other threads stop while we're single stepping a thread. 3904 actions.SetDefaultThreadActionIfNeeded(eStateStopped, 0); 3905 Error error = m_debugged_process_sp->Resume (actions); 3906 if (error.Fail ()) 3907 { 3908 if (log) 3909 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " Resume() failed with error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), tid, error.AsCString ()); 3910 return SendErrorResponse(0x49); 3911 } 3912 3913 // No response here - the stop or exit will come from the resulting action. 3914 return PacketResult::Success; 3915 } 3916 3917 GDBRemoteCommunicationServer::PacketResult 3918 GDBRemoteCommunicationServer::Handle_qSupported (StringExtractorGDBRemote &packet) 3919 { 3920 StreamGDBRemote response; 3921 3922 // Features common to lldb-platform and llgs. 3923 uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet size--debugger can always use less 3924 response.Printf ("PacketSize=%x", max_packet_size); 3925 3926 response.PutCString (";QStartNoAckMode+"); 3927 response.PutCString (";QThreadSuffixSupported+"); 3928 response.PutCString (";QListThreadsInStopReply+"); 3929 #if defined(__linux__) 3930 response.PutCString (";qXfer:auxv:read+"); 3931 #endif 3932 3933 return SendPacketNoLock(response.GetData(), response.GetSize()); 3934 } 3935 3936 GDBRemoteCommunicationServer::PacketResult 3937 GDBRemoteCommunicationServer::Handle_QThreadSuffixSupported (StringExtractorGDBRemote &packet) 3938 { 3939 m_thread_suffix_supported = true; 3940 return SendOKResponse(); 3941 } 3942 3943 GDBRemoteCommunicationServer::PacketResult 3944 GDBRemoteCommunicationServer::Handle_QListThreadsInStopReply (StringExtractorGDBRemote &packet) 3945 { 3946 m_list_threads_in_stop_reply = true; 3947 return SendOKResponse(); 3948 } 3949 3950 GDBRemoteCommunicationServer::PacketResult 3951 GDBRemoteCommunicationServer::Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet) 3952 { 3953 // We don't support if we're not llgs. 3954 if (!IsGdbServer()) 3955 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 3956 3957 // *BSD impls should be able to do this too. 3958 #if defined(__linux__) 3959 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3960 3961 // Parse out the offset. 3962 packet.SetFilePos (strlen("qXfer:auxv:read::")); 3963 if (packet.GetBytesLeft () < 1) 3964 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); 3965 3966 const uint64_t auxv_offset = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ()); 3967 if (auxv_offset == std::numeric_limits<uint64_t>::max ()) 3968 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); 3969 3970 // Parse out comma. 3971 if (packet.GetBytesLeft () < 1 || packet.GetChar () != ',') 3972 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing comma after offset"); 3973 3974 // Parse out the length. 3975 const uint64_t auxv_length = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ()); 3976 if (auxv_length == std::numeric_limits<uint64_t>::max ()) 3977 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing length"); 3978 3979 // Grab the auxv data if we need it. 3980 if (!m_active_auxv_buffer_sp) 3981 { 3982 // Make sure we have a valid process. 3983 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3984 { 3985 if (log) 3986 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3987 return SendErrorResponse (0x10); 3988 } 3989 3990 // Grab the auxv data. 3991 m_active_auxv_buffer_sp = Host::GetAuxvData (m_debugged_process_sp->GetID ()); 3992 if (!m_active_auxv_buffer_sp || m_active_auxv_buffer_sp->GetByteSize () == 0) 3993 { 3994 // Hmm, no auxv data, call that an error. 3995 if (log) 3996 log->Printf ("GDBRemoteCommunicationServer::%s failed, no auxv data retrieved", __FUNCTION__); 3997 m_active_auxv_buffer_sp.reset (); 3998 return SendErrorResponse (0x11); 3999 } 4000 } 4001 4002 // FIXME find out if/how I lock the stream here. 4003 4004 StreamGDBRemote response; 4005 bool done_with_buffer = false; 4006 4007 if (auxv_offset >= m_active_auxv_buffer_sp->GetByteSize ()) 4008 { 4009 // We have nothing left to send. Mark the buffer as complete. 4010 response.PutChar ('l'); 4011 done_with_buffer = true; 4012 } 4013 else 4014 { 4015 // Figure out how many bytes are available starting at the given offset. 4016 const uint64_t bytes_remaining = m_active_auxv_buffer_sp->GetByteSize () - auxv_offset; 4017 4018 // Figure out how many bytes we're going to read. 4019 const uint64_t bytes_to_read = (auxv_length > bytes_remaining) ? bytes_remaining : auxv_length; 4020 4021 // Mark the response type according to whether we're reading the remainder of the auxv data. 4022 if (bytes_to_read >= bytes_remaining) 4023 { 4024 // There will be nothing left to read after this 4025 response.PutChar ('l'); 4026 done_with_buffer = true; 4027 } 4028 else 4029 { 4030 // There will still be bytes to read after this request. 4031 response.PutChar ('m'); 4032 } 4033 4034 // Now write the data in encoded binary form. 4035 response.PutEscapedBytes (m_active_auxv_buffer_sp->GetBytes () + auxv_offset, bytes_to_read); 4036 } 4037 4038 if (done_with_buffer) 4039 m_active_auxv_buffer_sp.reset (); 4040 4041 return SendPacketNoLock(response.GetData(), response.GetSize()); 4042 #else 4043 return SendUnimplementedResponse ("not implemented on this platform"); 4044 #endif 4045 } 4046 4047 GDBRemoteCommunicationServer::PacketResult 4048 GDBRemoteCommunicationServer::Handle_QSaveRegisterState (StringExtractorGDBRemote &packet) 4049 { 4050 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4051 4052 // We don't support if we're not llgs. 4053 if (!IsGdbServer()) 4054 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4055 4056 // Move past packet name. 4057 packet.SetFilePos (strlen ("QSaveRegisterState")); 4058 4059 // Get the thread to use. 4060 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 4061 if (!thread_sp) 4062 { 4063 if (m_thread_suffix_supported) 4064 return SendIllFormedResponse (packet, "No thread specified in QSaveRegisterState packet"); 4065 else 4066 return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); 4067 } 4068 4069 // Grab the register context for the thread. 4070 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 4071 if (!reg_context_sp) 4072 { 4073 if (log) 4074 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 ()); 4075 return SendErrorResponse (0x15); 4076 } 4077 4078 // Save registers to a buffer. 4079 DataBufferSP register_data_sp; 4080 Error error = reg_context_sp->ReadAllRegisterValues (register_data_sp); 4081 if (error.Fail ()) 4082 { 4083 if (log) 4084 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to save all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4085 return SendErrorResponse (0x75); 4086 } 4087 4088 // Allocate a new save id. 4089 const uint32_t save_id = GetNextSavedRegistersID (); 4090 assert ((m_saved_registers_map.find (save_id) == m_saved_registers_map.end ()) && "GetNextRegisterSaveID() returned an existing register save id"); 4091 4092 // Save the register data buffer under the save id. 4093 { 4094 Mutex::Locker locker (m_saved_registers_mutex); 4095 m_saved_registers_map[save_id] = register_data_sp; 4096 } 4097 4098 // Write the response. 4099 StreamGDBRemote response; 4100 response.Printf ("%" PRIu32, save_id); 4101 return SendPacketNoLock(response.GetData(), response.GetSize()); 4102 } 4103 4104 GDBRemoteCommunicationServer::PacketResult 4105 GDBRemoteCommunicationServer::Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet) 4106 { 4107 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4108 4109 // We don't support if we're not llgs. 4110 if (!IsGdbServer()) 4111 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4112 4113 // Parse out save id. 4114 packet.SetFilePos (strlen ("QRestoreRegisterState:")); 4115 if (packet.GetBytesLeft () < 1) 4116 return SendIllFormedResponse (packet, "QRestoreRegisterState packet missing register save id"); 4117 4118 const uint32_t save_id = packet.GetU32 (0); 4119 if (save_id == 0) 4120 { 4121 if (log) 4122 log->Printf ("GDBRemoteCommunicationServer::%s QRestoreRegisterState packet has malformed save id, expecting decimal uint32_t", __FUNCTION__); 4123 return SendErrorResponse (0x76); 4124 } 4125 4126 // Get the thread to use. 4127 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 4128 if (!thread_sp) 4129 { 4130 if (m_thread_suffix_supported) 4131 return SendIllFormedResponse (packet, "No thread specified in QRestoreRegisterState packet"); 4132 else 4133 return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); 4134 } 4135 4136 // Grab the register context for the thread. 4137 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 4138 if (!reg_context_sp) 4139 { 4140 if (log) 4141 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 ()); 4142 return SendErrorResponse (0x15); 4143 } 4144 4145 // Retrieve register state buffer, then remove from the list. 4146 DataBufferSP register_data_sp; 4147 { 4148 Mutex::Locker locker (m_saved_registers_mutex); 4149 4150 // Find the register set buffer for the given save id. 4151 auto it = m_saved_registers_map.find (save_id); 4152 if (it == m_saved_registers_map.end ()) 4153 { 4154 if (log) 4155 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); 4156 return SendErrorResponse (0x77); 4157 } 4158 register_data_sp = it->second; 4159 4160 // Remove it from the map. 4161 m_saved_registers_map.erase (it); 4162 } 4163 4164 Error error = reg_context_sp->WriteAllRegisterValues (register_data_sp); 4165 if (error.Fail ()) 4166 { 4167 if (log) 4168 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to restore all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4169 return SendErrorResponse (0x77); 4170 } 4171 4172 return SendOKResponse(); 4173 } 4174 4175 GDBRemoteCommunicationServer::PacketResult 4176 GDBRemoteCommunicationServer::Handle_vAttach (StringExtractorGDBRemote &packet) 4177 { 4178 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4179 4180 // We don't support if we're not llgs. 4181 if (!IsGdbServer()) 4182 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4183 4184 // Consume the ';' after vAttach. 4185 packet.SetFilePos (strlen ("vAttach")); 4186 if (!packet.GetBytesLeft () || packet.GetChar () != ';') 4187 return SendIllFormedResponse (packet, "vAttach missing expected ';'"); 4188 4189 // Grab the PID to which we will attach (assume hex encoding). 4190 lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16); 4191 if (pid == LLDB_INVALID_PROCESS_ID) 4192 return SendIllFormedResponse (packet, "vAttach failed to parse the process id"); 4193 4194 // Attempt to attach. 4195 if (log) 4196 log->Printf ("GDBRemoteCommunicationServer::%s attempting to attach to pid %" PRIu64, __FUNCTION__, pid); 4197 4198 Error error = AttachToProcess (pid); 4199 4200 if (error.Fail ()) 4201 { 4202 if (log) 4203 log->Printf ("GDBRemoteCommunicationServer::%s failed to attach to pid %" PRIu64 ": %s\n", __FUNCTION__, pid, error.AsCString()); 4204 return SendErrorResponse (0x01); 4205 } 4206 4207 // Notify we attached by sending a stop packet. 4208 return SendStopReasonForState (m_debugged_process_sp->GetState (), true); 4209 } 4210 4211 GDBRemoteCommunicationServer::PacketResult 4212 GDBRemoteCommunicationServer::Handle_D (StringExtractorGDBRemote &packet) 4213 { 4214 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 4215 4216 // We don't support if we're not llgs. 4217 if (!IsGdbServer()) 4218 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4219 4220 // Scope for mutex locker. 4221 Mutex::Locker locker (m_spawned_pids_mutex); 4222 4223 // Fail if we don't have a current process. 4224 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 4225 { 4226 if (log) 4227 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 4228 return SendErrorResponse (0x15); 4229 } 4230 4231 if (m_spawned_pids.find(m_debugged_process_sp->GetID ()) == m_spawned_pids.end()) 4232 { 4233 if (log) 4234 log->Printf ("GDBRemoteCommunicationServer::%s failed to find PID %" PRIu64 " in spawned pids list", 4235 __FUNCTION__, m_debugged_process_sp->GetID ()); 4236 return SendErrorResponse (0x1); 4237 } 4238 4239 lldb::pid_t pid = LLDB_INVALID_PROCESS_ID; 4240 4241 // Consume the ';' after D. 4242 packet.SetFilePos (1); 4243 if (packet.GetBytesLeft ()) 4244 { 4245 if (packet.GetChar () != ';') 4246 return SendIllFormedResponse (packet, "D missing expected ';'"); 4247 4248 // Grab the PID from which we will detach (assume hex encoding). 4249 pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16); 4250 if (pid == LLDB_INVALID_PROCESS_ID) 4251 return SendIllFormedResponse (packet, "D failed to parse the process id"); 4252 } 4253 4254 if (pid != LLDB_INVALID_PROCESS_ID && 4255 m_debugged_process_sp->GetID () != pid) 4256 { 4257 return SendIllFormedResponse (packet, "Invalid pid"); 4258 } 4259 4260 if (m_stdio_communication.IsConnected ()) 4261 { 4262 m_stdio_communication.StopReadThread (); 4263 } 4264 4265 const Error error = m_debugged_process_sp->Detach (); 4266 if (error.Fail ()) 4267 { 4268 if (log) 4269 log->Printf ("GDBRemoteCommunicationServer::%s failed to detach from pid %" PRIu64 ": %s\n", 4270 __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4271 return SendErrorResponse (0x01); 4272 } 4273 4274 m_spawned_pids.erase (m_debugged_process_sp->GetID ()); 4275 return SendOKResponse (); 4276 } 4277 4278 GDBRemoteCommunicationServer::PacketResult 4279 GDBRemoteCommunicationServer::Handle_qThreadStopInfo (StringExtractorGDBRemote &packet) 4280 { 4281 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4282 4283 // We don't support if we're not llgs. 4284 if (!IsGdbServer()) 4285 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4286 4287 packet.SetFilePos (strlen("qThreadStopInfo")); 4288 const lldb::tid_t tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); 4289 if (tid == LLDB_INVALID_THREAD_ID) 4290 { 4291 if (log) 4292 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse thread id from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 4293 return SendErrorResponse (0x15); 4294 } 4295 return SendStopReplyPacketForThread (tid); 4296 } 4297 4298 void 4299 GDBRemoteCommunicationServer::FlushInferiorOutput () 4300 { 4301 // If we're not monitoring an inferior's terminal, ignore this. 4302 if (!m_stdio_communication.IsConnected()) 4303 return; 4304 4305 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 4306 if (log) 4307 log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); 4308 4309 // FIXME implement a timeout on the join. 4310 m_stdio_communication.JoinReadThread(); 4311 } 4312 4313 void 4314 GDBRemoteCommunicationServer::MaybeCloseInferiorTerminalConnection () 4315 { 4316 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4317 4318 // Tell the stdio connection to shut down. 4319 if (m_stdio_communication.IsConnected()) 4320 { 4321 auto connection = m_stdio_communication.GetConnection(); 4322 if (connection) 4323 { 4324 Error error; 4325 connection->Disconnect (&error); 4326 4327 if (error.Success ()) 4328 { 4329 if (log) 4330 log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - SUCCESS", __FUNCTION__); 4331 } 4332 else 4333 { 4334 if (log) 4335 log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - FAIL: %s", __FUNCTION__, error.AsCString ()); 4336 } 4337 } 4338 } 4339 } 4340 4341 4342 lldb_private::NativeThreadProtocolSP 4343 GDBRemoteCommunicationServer::GetThreadFromSuffix (StringExtractorGDBRemote &packet) 4344 { 4345 NativeThreadProtocolSP thread_sp; 4346 4347 // We have no thread if we don't have a process. 4348 if (!m_debugged_process_sp || m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID) 4349 return thread_sp; 4350 4351 // If the client hasn't asked for thread suffix support, there will not be a thread suffix. 4352 // Use the current thread in that case. 4353 if (!m_thread_suffix_supported) 4354 { 4355 const lldb::tid_t current_tid = GetCurrentThreadID (); 4356 if (current_tid == LLDB_INVALID_THREAD_ID) 4357 return thread_sp; 4358 else if (current_tid == 0) 4359 { 4360 // Pick a thread. 4361 return m_debugged_process_sp->GetThreadAtIndex (0); 4362 } 4363 else 4364 return m_debugged_process_sp->GetThreadByID (current_tid); 4365 } 4366 4367 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4368 4369 // Parse out the ';'. 4370 if (packet.GetBytesLeft () < 1 || packet.GetChar () != ';') 4371 { 4372 if (log) 4373 log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected ';' prior to start of thread suffix: packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); 4374 return thread_sp; 4375 } 4376 4377 if (!packet.GetBytesLeft ()) 4378 return thread_sp; 4379 4380 // Parse out thread: portion. 4381 if (strncmp (packet.Peek (), "thread:", strlen("thread:")) != 0) 4382 { 4383 if (log) 4384 log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected 'thread:' but not found, packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); 4385 return thread_sp; 4386 } 4387 packet.SetFilePos (packet.GetFilePos () + strlen("thread:")); 4388 const lldb::tid_t tid = packet.GetHexMaxU64(false, 0); 4389 if (tid != 0) 4390 return m_debugged_process_sp->GetThreadByID (tid); 4391 4392 return thread_sp; 4393 } 4394 4395 lldb::tid_t 4396 GDBRemoteCommunicationServer::GetCurrentThreadID () const 4397 { 4398 if (m_current_tid == 0 || m_current_tid == LLDB_INVALID_THREAD_ID) 4399 { 4400 // Use whatever the debug process says is the current thread id 4401 // since the protocol either didn't specify or specified we want 4402 // any/all threads marked as the current thread. 4403 if (!m_debugged_process_sp) 4404 return LLDB_INVALID_THREAD_ID; 4405 return m_debugged_process_sp->GetCurrentThreadID (); 4406 } 4407 // Use the specific current thread id set by the gdb remote protocol. 4408 return m_current_tid; 4409 } 4410 4411 uint32_t 4412 GDBRemoteCommunicationServer::GetNextSavedRegistersID () 4413 { 4414 Mutex::Locker locker (m_saved_registers_mutex); 4415 return m_next_saved_registers_id++; 4416 } 4417 4418 void 4419 GDBRemoteCommunicationServer::ClearProcessSpecificData () 4420 { 4421 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|GDBR_LOG_PROCESS)); 4422 if (log) 4423 log->Printf ("GDBRemoteCommunicationServer::%s()", __FUNCTION__); 4424 4425 // Clear any auxv cached data. 4426 // *BSD impls should be able to do this too. 4427 #if defined(__linux__) 4428 if (log) 4429 log->Printf ("GDBRemoteCommunicationServer::%s clearing auxv buffer (previously %s)", 4430 __FUNCTION__, 4431 m_active_auxv_buffer_sp ? "was set" : "was not set"); 4432 m_active_auxv_buffer_sp.reset (); 4433 #endif 4434 } 4435