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/Host/common/NativeRegisterContext.h" 43 #include "lldb/Host/common/NativeProcessProtocol.h" 44 #include "lldb/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_qWatchpointSupportInfo: 282 packet_result = Handle_qWatchpointSupportInfo (packet); 283 break; 284 285 case StringExtractorGDBRemote::eServerPacketType_C: 286 packet_result = Handle_C (packet); 287 break; 288 289 case StringExtractorGDBRemote::eServerPacketType_c: 290 packet_result = Handle_c (packet); 291 break; 292 293 case StringExtractorGDBRemote::eServerPacketType_vCont: 294 packet_result = Handle_vCont (packet); 295 break; 296 297 case StringExtractorGDBRemote::eServerPacketType_vCont_actions: 298 packet_result = Handle_vCont_actions (packet); 299 break; 300 301 case StringExtractorGDBRemote::eServerPacketType_stop_reason: // ? 302 packet_result = Handle_stop_reason (packet); 303 break; 304 305 case StringExtractorGDBRemote::eServerPacketType_vFile_open: 306 packet_result = Handle_vFile_Open (packet); 307 break; 308 309 case StringExtractorGDBRemote::eServerPacketType_vFile_close: 310 packet_result = Handle_vFile_Close (packet); 311 break; 312 313 case StringExtractorGDBRemote::eServerPacketType_vFile_pread: 314 packet_result = Handle_vFile_pRead (packet); 315 break; 316 317 case StringExtractorGDBRemote::eServerPacketType_vFile_pwrite: 318 packet_result = Handle_vFile_pWrite (packet); 319 break; 320 321 case StringExtractorGDBRemote::eServerPacketType_vFile_size: 322 packet_result = Handle_vFile_Size (packet); 323 break; 324 325 case StringExtractorGDBRemote::eServerPacketType_vFile_mode: 326 packet_result = Handle_vFile_Mode (packet); 327 break; 328 329 case StringExtractorGDBRemote::eServerPacketType_vFile_exists: 330 packet_result = Handle_vFile_Exists (packet); 331 break; 332 333 case StringExtractorGDBRemote::eServerPacketType_vFile_stat: 334 packet_result = Handle_vFile_Stat (packet); 335 break; 336 337 case StringExtractorGDBRemote::eServerPacketType_vFile_md5: 338 packet_result = Handle_vFile_MD5 (packet); 339 break; 340 341 case StringExtractorGDBRemote::eServerPacketType_vFile_symlink: 342 packet_result = Handle_vFile_symlink (packet); 343 break; 344 345 case StringExtractorGDBRemote::eServerPacketType_vFile_unlink: 346 packet_result = Handle_vFile_unlink (packet); 347 break; 348 349 case StringExtractorGDBRemote::eServerPacketType_qRegisterInfo: 350 packet_result = Handle_qRegisterInfo (packet); 351 break; 352 353 case StringExtractorGDBRemote::eServerPacketType_qfThreadInfo: 354 packet_result = Handle_qfThreadInfo (packet); 355 break; 356 357 case StringExtractorGDBRemote::eServerPacketType_qsThreadInfo: 358 packet_result = Handle_qsThreadInfo (packet); 359 break; 360 361 case StringExtractorGDBRemote::eServerPacketType_p: 362 packet_result = Handle_p (packet); 363 break; 364 365 case StringExtractorGDBRemote::eServerPacketType_P: 366 packet_result = Handle_P (packet); 367 break; 368 369 case StringExtractorGDBRemote::eServerPacketType_H: 370 packet_result = Handle_H (packet); 371 break; 372 373 case StringExtractorGDBRemote::eServerPacketType_m: 374 packet_result = Handle_m (packet); 375 break; 376 377 case StringExtractorGDBRemote::eServerPacketType_M: 378 packet_result = Handle_M (packet); 379 break; 380 381 case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfoSupported: 382 packet_result = Handle_qMemoryRegionInfoSupported (packet); 383 break; 384 385 case StringExtractorGDBRemote::eServerPacketType_qMemoryRegionInfo: 386 packet_result = Handle_qMemoryRegionInfo (packet); 387 break; 388 389 case StringExtractorGDBRemote::eServerPacketType_interrupt: 390 if (IsGdbServer ()) 391 packet_result = Handle_interrupt (packet); 392 else 393 { 394 error.SetErrorString("interrupt received"); 395 interrupt = true; 396 } 397 break; 398 399 case StringExtractorGDBRemote::eServerPacketType_Z: 400 packet_result = Handle_Z (packet); 401 break; 402 403 case StringExtractorGDBRemote::eServerPacketType_z: 404 packet_result = Handle_z (packet); 405 break; 406 407 case StringExtractorGDBRemote::eServerPacketType_s: 408 packet_result = Handle_s (packet); 409 break; 410 411 case StringExtractorGDBRemote::eServerPacketType_qSupported: 412 packet_result = Handle_qSupported (packet); 413 break; 414 415 case StringExtractorGDBRemote::eServerPacketType_QThreadSuffixSupported: 416 packet_result = Handle_QThreadSuffixSupported (packet); 417 break; 418 419 case StringExtractorGDBRemote::eServerPacketType_QListThreadsInStopReply: 420 packet_result = Handle_QListThreadsInStopReply (packet); 421 break; 422 423 case StringExtractorGDBRemote::eServerPacketType_qXfer_auxv_read: 424 packet_result = Handle_qXfer_auxv_read (packet); 425 break; 426 427 case StringExtractorGDBRemote::eServerPacketType_QSaveRegisterState: 428 packet_result = Handle_QSaveRegisterState (packet); 429 break; 430 431 case StringExtractorGDBRemote::eServerPacketType_QRestoreRegisterState: 432 packet_result = Handle_QRestoreRegisterState (packet); 433 break; 434 435 case StringExtractorGDBRemote::eServerPacketType_vAttach: 436 packet_result = Handle_vAttach (packet); 437 break; 438 439 case StringExtractorGDBRemote::eServerPacketType_D: 440 packet_result = Handle_D (packet); 441 break; 442 443 case StringExtractorGDBRemote::eServerPacketType_qThreadStopInfo: 444 packet_result = Handle_qThreadStopInfo (packet); 445 break; 446 } 447 } 448 else 449 { 450 if (!IsConnected()) 451 { 452 error.SetErrorString("lost connection"); 453 quit = true; 454 } 455 else 456 { 457 error.SetErrorString("timeout"); 458 } 459 } 460 461 // Check if anything occurred that would force us to want to exit. 462 if (m_exit_now) 463 quit = true; 464 465 return packet_result; 466 } 467 468 lldb_private::Error 469 GDBRemoteCommunicationServer::SetLaunchArguments (const char *const args[], int argc) 470 { 471 if ((argc < 1) || !args || !args[0] || !args[0][0]) 472 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 473 474 m_process_launch_info.SetArguments (const_cast<const char**> (args), true); 475 return lldb_private::Error (); 476 } 477 478 lldb_private::Error 479 GDBRemoteCommunicationServer::SetLaunchFlags (unsigned int launch_flags) 480 { 481 m_process_launch_info.GetFlags ().Set (launch_flags); 482 return lldb_private::Error (); 483 } 484 485 lldb_private::Error 486 GDBRemoteCommunicationServer::LaunchProcess () 487 { 488 // FIXME This looks an awful lot like we could override this in 489 // derived classes, one for lldb-platform, the other for lldb-gdbserver. 490 if (IsGdbServer ()) 491 return LaunchProcessForDebugging (); 492 else 493 return LaunchPlatformProcess (); 494 } 495 496 bool 497 GDBRemoteCommunicationServer::ShouldRedirectInferiorOutputOverGdbRemote (const lldb_private::ProcessLaunchInfo &launch_info) const 498 { 499 // Retrieve the file actions specified for stdout and stderr. 500 auto stdout_file_action = launch_info.GetFileActionForFD (STDOUT_FILENO); 501 auto stderr_file_action = launch_info.GetFileActionForFD (STDERR_FILENO); 502 503 // If neither stdout and stderr file actions are specified, we're not doing anything special, so 504 // assume we want to redirect stdout/stderr over gdb-remote $O messages. 505 if ((stdout_file_action == nullptr) && (stderr_file_action == nullptr)) 506 { 507 // Send stdout/stderr over the gdb-remote protocol. 508 return true; 509 } 510 511 // Any other setting for either stdout or stderr implies we are either suppressing 512 // it (with /dev/null) or we've got it set to a PTY. Either way, we don't want the 513 // output over gdb-remote. 514 return false; 515 } 516 517 lldb_private::Error 518 GDBRemoteCommunicationServer::LaunchProcessForDebugging () 519 { 520 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 521 522 if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) 523 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 524 525 lldb_private::Error error; 526 { 527 Mutex::Locker locker (m_debugged_process_mutex); 528 assert (!m_debugged_process_sp && "lldb-gdbserver creating debugged process but one already exists"); 529 error = m_platform_sp->LaunchNativeProcess ( 530 m_process_launch_info, 531 *this, 532 m_debugged_process_sp); 533 } 534 535 if (!error.Success ()) 536 { 537 fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); 538 return error; 539 } 540 541 // Handle mirroring of inferior stdout/stderr over the gdb-remote protocol as needed. 542 // llgs local-process debugging may specify PTYs, which will eliminate the need to reflect inferior 543 // stdout/stderr over the gdb-remote protocol. 544 if (ShouldRedirectInferiorOutputOverGdbRemote (m_process_launch_info)) 545 { 546 if (log) 547 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " setting up stdout/stderr redirection via $O gdb-remote commands", __FUNCTION__, m_debugged_process_sp->GetID ()); 548 549 // Setup stdout/stderr mapping from inferior to $O 550 auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); 551 if (terminal_fd >= 0) 552 { 553 if (log) 554 log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); 555 error = SetSTDIOFileDescriptor (terminal_fd); 556 if (error.Fail ()) 557 return error; 558 } 559 else 560 { 561 if (log) 562 log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); 563 } 564 } 565 else 566 { 567 if (log) 568 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 ()); 569 } 570 571 printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID ()); 572 573 // Add to list of spawned processes. 574 lldb::pid_t pid; 575 if ((pid = m_process_launch_info.GetProcessID ()) != LLDB_INVALID_PROCESS_ID) 576 { 577 // add to spawned pids 578 Mutex::Locker locker (m_spawned_pids_mutex); 579 // On an lldb-gdbserver, we would expect there to be only one. 580 assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); 581 m_spawned_pids.insert (pid); 582 } 583 584 return error; 585 } 586 587 lldb_private::Error 588 GDBRemoteCommunicationServer::LaunchPlatformProcess () 589 { 590 if (!m_process_launch_info.GetArguments ().GetArgumentCount ()) 591 return lldb_private::Error ("%s: no process command line specified to launch", __FUNCTION__); 592 593 // specify the process monitor if not already set. This should 594 // generally be what happens since we need to reap started 595 // processes. 596 if (!m_process_launch_info.GetMonitorProcessCallback ()) 597 m_process_launch_info.SetMonitorProcessCallback(ReapDebuggedProcess, this, false); 598 599 lldb_private::Error error = m_platform_sp->LaunchProcess (m_process_launch_info); 600 if (!error.Success ()) 601 { 602 fprintf (stderr, "%s: failed to launch executable %s", __FUNCTION__, m_process_launch_info.GetArguments ().GetArgumentAtIndex (0)); 603 return error; 604 } 605 606 printf ("Launched '%s' as process %" PRIu64 "...\n", m_process_launch_info.GetArguments ().GetArgumentAtIndex (0), m_process_launch_info.GetProcessID()); 607 608 // add to list of spawned processes. On an lldb-gdbserver, we 609 // would expect there to be only one. 610 lldb::pid_t pid; 611 if ( (pid = m_process_launch_info.GetProcessID()) != LLDB_INVALID_PROCESS_ID ) 612 { 613 // add to spawned pids 614 { 615 Mutex::Locker locker (m_spawned_pids_mutex); 616 m_spawned_pids.insert(pid); 617 } 618 } 619 620 return error; 621 } 622 623 lldb_private::Error 624 GDBRemoteCommunicationServer::AttachToProcess (lldb::pid_t pid) 625 { 626 Error error; 627 628 if (!IsGdbServer ()) 629 { 630 error.SetErrorString("cannot AttachToProcess () unless process is lldb-gdbserver"); 631 return error; 632 } 633 634 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 635 if (log) 636 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64, __FUNCTION__, pid); 637 638 // Scope for mutex locker. 639 { 640 // Before we try to attach, make sure we aren't already monitoring something else. 641 Mutex::Locker locker (m_spawned_pids_mutex); 642 if (!m_spawned_pids.empty ()) 643 { 644 error.SetErrorStringWithFormat ("cannot attach to a process %" PRIu64 " when another process with pid %" PRIu64 " is being debugged.", pid, *m_spawned_pids.begin()); 645 return error; 646 } 647 648 // Try to attach. 649 error = m_platform_sp->AttachNativeProcess (pid, *this, m_debugged_process_sp); 650 if (!error.Success ()) 651 { 652 fprintf (stderr, "%s: failed to attach to process %" PRIu64 ": %s", __FUNCTION__, pid, error.AsCString ()); 653 return error; 654 } 655 656 // Setup stdout/stderr mapping from inferior. 657 auto terminal_fd = m_debugged_process_sp->GetTerminalFileDescriptor (); 658 if (terminal_fd >= 0) 659 { 660 if (log) 661 log->Printf ("ProcessGDBRemoteCommunicationServer::%s setting inferior STDIO fd to %d", __FUNCTION__, terminal_fd); 662 error = SetSTDIOFileDescriptor (terminal_fd); 663 if (error.Fail ()) 664 return error; 665 } 666 else 667 { 668 if (log) 669 log->Printf ("ProcessGDBRemoteCommunicationServer::%s ignoring inferior STDIO since terminal fd reported as %d", __FUNCTION__, terminal_fd); 670 } 671 672 printf ("Attached to process %" PRIu64 "...\n", pid); 673 674 // Add to list of spawned processes. 675 assert (m_spawned_pids.empty () && "lldb-gdbserver adding tracked process but one already existed"); 676 m_spawned_pids.insert (pid); 677 678 return error; 679 } 680 } 681 682 void 683 GDBRemoteCommunicationServer::InitializeDelegate (lldb_private::NativeProcessProtocol *process) 684 { 685 assert (process && "process cannot be NULL"); 686 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 687 if (log) 688 { 689 log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", current state: %s", 690 __FUNCTION__, 691 process->GetID (), 692 StateAsCString (process->GetState ())); 693 } 694 } 695 696 GDBRemoteCommunication::PacketResult 697 GDBRemoteCommunicationServer::SendWResponse (lldb_private::NativeProcessProtocol *process) 698 { 699 assert (process && "process cannot be NULL"); 700 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 701 702 // send W notification 703 ExitType exit_type = ExitType::eExitTypeInvalid; 704 int return_code = 0; 705 std::string exit_description; 706 707 const bool got_exit_info = process->GetExitStatus (&exit_type, &return_code, exit_description); 708 if (!got_exit_info) 709 { 710 if (log) 711 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", failed to retrieve process exit status", __FUNCTION__, process->GetID ()); 712 713 StreamGDBRemote response; 714 response.PutChar ('E'); 715 response.PutHex8 (GDBRemoteServerError::eErrorExitStatus); 716 return SendPacketNoLock(response.GetData(), response.GetSize()); 717 } 718 else 719 { 720 if (log) 721 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 ()); 722 723 StreamGDBRemote response; 724 725 char return_type_code; 726 switch (exit_type) 727 { 728 case ExitType::eExitTypeExit: 729 return_type_code = 'W'; 730 break; 731 case ExitType::eExitTypeSignal: 732 return_type_code = 'X'; 733 break; 734 case ExitType::eExitTypeStop: 735 return_type_code = 'S'; 736 break; 737 case ExitType::eExitTypeInvalid: 738 return_type_code = 'E'; 739 break; 740 } 741 response.PutChar (return_type_code); 742 743 // POSIX exit status limited to unsigned 8 bits. 744 response.PutHex8 (return_code); 745 746 return SendPacketNoLock(response.GetData(), response.GetSize()); 747 } 748 } 749 750 static void 751 AppendHexValue (StreamString &response, const uint8_t* buf, uint32_t buf_size, bool swap) 752 { 753 int64_t i; 754 if (swap) 755 { 756 for (i = buf_size-1; i >= 0; i--) 757 response.PutHex8 (buf[i]); 758 } 759 else 760 { 761 for (i = 0; i < buf_size; i++) 762 response.PutHex8 (buf[i]); 763 } 764 } 765 766 static void 767 WriteRegisterValueInHexFixedWidth (StreamString &response, 768 NativeRegisterContextSP ®_ctx_sp, 769 const RegisterInfo ®_info, 770 const RegisterValue *reg_value_p) 771 { 772 RegisterValue reg_value; 773 if (!reg_value_p) 774 { 775 Error error = reg_ctx_sp->ReadRegister (®_info, reg_value); 776 if (error.Success ()) 777 reg_value_p = ®_value; 778 // else log. 779 } 780 781 if (reg_value_p) 782 { 783 AppendHexValue (response, (const uint8_t*) reg_value_p->GetBytes (), reg_value_p->GetByteSize (), false); 784 } 785 else 786 { 787 // Zero-out any unreadable values. 788 if (reg_info.byte_size > 0) 789 { 790 std::basic_string<uint8_t> zeros(reg_info.byte_size, '\0'); 791 AppendHexValue (response, zeros.data(), zeros.size(), false); 792 } 793 } 794 } 795 796 // WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); 797 798 799 static void 800 WriteGdbRegnumWithFixedWidthHexRegisterValue (StreamString &response, 801 NativeRegisterContextSP ®_ctx_sp, 802 const RegisterInfo ®_info, 803 const RegisterValue ®_value) 804 { 805 // Output the register number as 'NN:VVVVVVVV;' where NN is a 2 bytes HEX 806 // gdb register number, and VVVVVVVV is the correct number of hex bytes 807 // as ASCII for the register value. 808 if (reg_info.kinds[eRegisterKindGDB] == LLDB_INVALID_REGNUM) 809 return; 810 811 response.Printf ("%.02x:", reg_info.kinds[eRegisterKindGDB]); 812 WriteRegisterValueInHexFixedWidth (response, reg_ctx_sp, reg_info, ®_value); 813 response.PutChar (';'); 814 } 815 816 817 GDBRemoteCommunication::PacketResult 818 GDBRemoteCommunicationServer::SendStopReplyPacketForThread (lldb::tid_t tid) 819 { 820 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 821 822 // Ensure we're llgs. 823 if (!IsGdbServer ()) 824 { 825 // Only supported on llgs 826 return SendUnimplementedResponse (""); 827 } 828 829 // Ensure we have a debugged process. 830 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 831 return SendErrorResponse (50); 832 833 if (log) 834 log->Printf ("GDBRemoteCommunicationServer::%s preparing packet for pid %" PRIu64 " tid %" PRIu64, 835 __FUNCTION__, m_debugged_process_sp->GetID (), tid); 836 837 // Ensure we can get info on the given thread. 838 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); 839 if (!thread_sp) 840 return SendErrorResponse (51); 841 842 // Grab the reason this thread stopped. 843 struct ThreadStopInfo tid_stop_info; 844 std::string description; 845 if (!thread_sp->GetStopReason (tid_stop_info, description)) 846 return SendErrorResponse (52); 847 848 // FIXME implement register handling for exec'd inferiors. 849 // if (tid_stop_info.reason == eStopReasonExec) 850 // { 851 // const bool force = true; 852 // InitializeRegisters(force); 853 // } 854 855 StreamString response; 856 // Output the T packet with the thread 857 response.PutChar ('T'); 858 int signum = tid_stop_info.details.signal.signo; 859 if (log) 860 { 861 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " got signal signo = %d, reason = %d, exc_type = %" PRIu64, 862 __FUNCTION__, 863 m_debugged_process_sp->GetID (), 864 tid, 865 signum, 866 tid_stop_info.reason, 867 tid_stop_info.details.exception.type); 868 } 869 870 // Print the signal number. 871 response.PutHex8 (signum & 0xff); 872 873 // Include the tid. 874 response.Printf ("thread:%" PRIx64 ";", tid); 875 876 // Include the thread name if there is one. 877 const std::string thread_name = thread_sp->GetName (); 878 if (!thread_name.empty ()) 879 { 880 size_t thread_name_len = thread_name.length (); 881 882 if (::strcspn (thread_name.c_str (), "$#+-;:") == thread_name_len) 883 { 884 response.PutCString ("name:"); 885 response.PutCString (thread_name.c_str ()); 886 } 887 else 888 { 889 // The thread name contains special chars, send as hex bytes. 890 response.PutCString ("hexname:"); 891 response.PutCStringAsRawHex8 (thread_name.c_str ()); 892 } 893 response.PutChar (';'); 894 } 895 896 // If a 'QListThreadsInStopReply' was sent to enable this feature, we 897 // will send all thread IDs back in the "threads" key whose value is 898 // a list of hex thread IDs separated by commas: 899 // "threads:10a,10b,10c;" 900 // This will save the debugger from having to send a pair of qfThreadInfo 901 // and qsThreadInfo packets, but it also might take a lot of room in the 902 // stop reply packet, so it must be enabled only on systems where there 903 // are no limits on packet lengths. 904 if (m_list_threads_in_stop_reply) 905 { 906 response.PutCString ("threads:"); 907 908 uint32_t thread_index = 0; 909 NativeThreadProtocolSP listed_thread_sp; 910 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)) 911 { 912 if (thread_index > 0) 913 response.PutChar (','); 914 response.Printf ("%" PRIx64, listed_thread_sp->GetID ()); 915 } 916 response.PutChar (';'); 917 } 918 919 // 920 // Expedite registers. 921 // 922 923 // Grab the register context. 924 NativeRegisterContextSP reg_ctx_sp = thread_sp->GetRegisterContext (); 925 if (reg_ctx_sp) 926 { 927 // Expedite all registers in the first register set (i.e. should be GPRs) that are not contained in other registers. 928 const RegisterSet *reg_set_p; 929 if (reg_ctx_sp->GetRegisterSetCount () > 0 && ((reg_set_p = reg_ctx_sp->GetRegisterSet (0)) != nullptr)) 930 { 931 if (log) 932 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); 933 934 for (const uint32_t *reg_num_p = reg_set_p->registers; *reg_num_p != LLDB_INVALID_REGNUM; ++reg_num_p) 935 { 936 const RegisterInfo *const reg_info_p = reg_ctx_sp->GetRegisterInfoAtIndex (*reg_num_p); 937 if (reg_info_p == nullptr) 938 { 939 if (log) 940 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); 941 } 942 else if (reg_info_p->value_regs == nullptr) 943 { 944 // Only expediate registers that are not contained in other registers. 945 RegisterValue reg_value; 946 Error error = reg_ctx_sp->ReadRegister (reg_info_p, reg_value); 947 if (error.Success ()) 948 WriteGdbRegnumWithFixedWidthHexRegisterValue (response, reg_ctx_sp, *reg_info_p, reg_value); 949 else 950 { 951 if (log) 952 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 ()); 953 954 } 955 } 956 } 957 } 958 } 959 960 const char* reason_str = nullptr; 961 switch (tid_stop_info.reason) 962 { 963 case eStopReasonTrace: 964 reason_str = "trace"; 965 break; 966 case eStopReasonBreakpoint: 967 reason_str = "breakpoint"; 968 break; 969 case eStopReasonWatchpoint: 970 reason_str = "watchpoint"; 971 break; 972 case eStopReasonSignal: 973 reason_str = "signal"; 974 break; 975 case eStopReasonException: 976 reason_str = "exception"; 977 break; 978 case eStopReasonExec: 979 reason_str = "exec"; 980 break; 981 case eStopReasonInstrumentation: 982 case eStopReasonInvalid: 983 case eStopReasonPlanComplete: 984 case eStopReasonThreadExiting: 985 case eStopReasonNone: 986 break; 987 } 988 if (reason_str != nullptr) 989 { 990 response.Printf ("reason:%s;", reason_str); 991 } 992 993 if (!description.empty()) 994 { 995 // Description may contains special chars, send as hex bytes. 996 response.PutCString ("description:"); 997 response.PutCStringAsRawHex8 (description.c_str ()); 998 response.PutChar (';'); 999 } 1000 else if ((tid_stop_info.reason == eStopReasonException) && tid_stop_info.details.exception.type) 1001 { 1002 response.PutCString ("metype:"); 1003 response.PutHex64 (tid_stop_info.details.exception.type); 1004 response.PutCString (";mecount:"); 1005 response.PutHex32 (tid_stop_info.details.exception.data_count); 1006 response.PutChar (';'); 1007 1008 for (uint32_t i = 0; i < tid_stop_info.details.exception.data_count; ++i) 1009 { 1010 response.PutCString ("medata:"); 1011 response.PutHex64 (tid_stop_info.details.exception.data[i]); 1012 response.PutChar (';'); 1013 } 1014 } 1015 1016 return SendPacketNoLock (response.GetData(), response.GetSize()); 1017 } 1018 1019 void 1020 GDBRemoteCommunicationServer::HandleInferiorState_Exited (lldb_private::NativeProcessProtocol *process) 1021 { 1022 assert (process && "process cannot be NULL"); 1023 1024 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1025 if (log) 1026 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 1027 1028 // Send the exit result, and don't flush output. 1029 // Note: flushing output here would join the inferior stdio reflection thread, which 1030 // would gunk up the waitpid monitor thread that is calling this. 1031 PacketResult result = SendStopReasonForState (StateType::eStateExited, false); 1032 if (result != PacketResult::Success) 1033 { 1034 if (log) 1035 log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); 1036 } 1037 1038 // Remove the process from the list of spawned pids. 1039 { 1040 Mutex::Locker locker (m_spawned_pids_mutex); 1041 if (m_spawned_pids.erase (process->GetID ()) < 1) 1042 { 1043 if (log) 1044 log->Printf ("GDBRemoteCommunicationServer::%s failed to remove PID %" PRIu64 " from the spawned pids list", __FUNCTION__, process->GetID ()); 1045 1046 } 1047 } 1048 1049 // FIXME can't do this yet - since process state propagation is currently 1050 // synchronous, it is running off the NativeProcessProtocol's innards and 1051 // will tear down the NPP while it still has code to execute. 1052 #if 0 1053 // Clear the NativeProcessProtocol pointer. 1054 { 1055 Mutex::Locker locker (m_debugged_process_mutex); 1056 m_debugged_process_sp.reset(); 1057 } 1058 #endif 1059 1060 // Close the pipe to the inferior terminal i/o if we launched it 1061 // and set one up. Otherwise, 'k' and its flush of stdio could 1062 // end up waiting on a thread join that will never end. Consider 1063 // adding a timeout to the connection thread join call so we 1064 // can avoid that scenario altogether. 1065 MaybeCloseInferiorTerminalConnection (); 1066 1067 // We are ready to exit the debug monitor. 1068 m_exit_now = true; 1069 } 1070 1071 void 1072 GDBRemoteCommunicationServer::HandleInferiorState_Stopped (lldb_private::NativeProcessProtocol *process) 1073 { 1074 assert (process && "process cannot be NULL"); 1075 1076 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1077 if (log) 1078 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 1079 1080 // Send the stop reason unless this is the stop after the 1081 // launch or attach. 1082 switch (m_inferior_prev_state) 1083 { 1084 case eStateLaunching: 1085 case eStateAttaching: 1086 // Don't send anything per debugserver behavior. 1087 break; 1088 default: 1089 // In all other cases, send the stop reason. 1090 PacketResult result = SendStopReasonForState (StateType::eStateStopped, false); 1091 if (result != PacketResult::Success) 1092 { 1093 if (log) 1094 log->Printf ("GDBRemoteCommunicationServer::%s failed to send stop notification for PID %" PRIu64 ", state: eStateExited", __FUNCTION__, process->GetID ()); 1095 } 1096 break; 1097 } 1098 } 1099 1100 void 1101 GDBRemoteCommunicationServer::ProcessStateChanged (lldb_private::NativeProcessProtocol *process, lldb::StateType state) 1102 { 1103 assert (process && "process cannot be NULL"); 1104 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1105 if (log) 1106 { 1107 log->Printf ("GDBRemoteCommunicationServer::%s called with NativeProcessProtocol pid %" PRIu64 ", state: %s", 1108 __FUNCTION__, 1109 process->GetID (), 1110 StateAsCString (state)); 1111 } 1112 1113 switch (state) 1114 { 1115 case StateType::eStateExited: 1116 HandleInferiorState_Exited (process); 1117 break; 1118 1119 case StateType::eStateStopped: 1120 HandleInferiorState_Stopped (process); 1121 break; 1122 1123 default: 1124 if (log) 1125 { 1126 log->Printf ("GDBRemoteCommunicationServer::%s didn't handle state change for pid %" PRIu64 ", new state: %s", 1127 __FUNCTION__, 1128 process->GetID (), 1129 StateAsCString (state)); 1130 } 1131 break; 1132 } 1133 1134 // Remember the previous state reported to us. 1135 m_inferior_prev_state = state; 1136 } 1137 1138 void 1139 GDBRemoteCommunicationServer::DidExec (NativeProcessProtocol *process) 1140 { 1141 ClearProcessSpecificData (); 1142 } 1143 1144 GDBRemoteCommunication::PacketResult 1145 GDBRemoteCommunicationServer::SendONotification (const char *buffer, uint32_t len) 1146 { 1147 if ((buffer == nullptr) || (len == 0)) 1148 { 1149 // Nothing to send. 1150 return PacketResult::Success; 1151 } 1152 1153 StreamString response; 1154 response.PutChar ('O'); 1155 response.PutBytesAsRawHex8 (buffer, len); 1156 1157 return SendPacketNoLock (response.GetData (), response.GetSize ()); 1158 } 1159 1160 lldb_private::Error 1161 GDBRemoteCommunicationServer::SetSTDIOFileDescriptor (int fd) 1162 { 1163 Error error; 1164 1165 // Set up the Read Thread for reading/handling process I/O 1166 std::unique_ptr<ConnectionFileDescriptor> conn_up (new ConnectionFileDescriptor (fd, true)); 1167 if (!conn_up) 1168 { 1169 error.SetErrorString ("failed to create ConnectionFileDescriptor"); 1170 return error; 1171 } 1172 1173 m_stdio_communication.SetConnection (conn_up.release()); 1174 if (!m_stdio_communication.IsConnected ()) 1175 { 1176 error.SetErrorString ("failed to set connection for inferior I/O communication"); 1177 return error; 1178 } 1179 1180 m_stdio_communication.SetReadThreadBytesReceivedCallback (STDIOReadThreadBytesReceived, this); 1181 m_stdio_communication.StartReadThread(); 1182 1183 return error; 1184 } 1185 1186 void 1187 GDBRemoteCommunicationServer::STDIOReadThreadBytesReceived (void *baton, const void *src, size_t src_len) 1188 { 1189 GDBRemoteCommunicationServer *server = reinterpret_cast<GDBRemoteCommunicationServer*> (baton); 1190 static_cast<void> (server->SendONotification (static_cast<const char *>(src), src_len)); 1191 } 1192 1193 GDBRemoteCommunication::PacketResult 1194 GDBRemoteCommunicationServer::SendUnimplementedResponse (const char *) 1195 { 1196 // TODO: Log the packet we aren't handling... 1197 return SendPacketNoLock ("", 0); 1198 } 1199 1200 1201 GDBRemoteCommunication::PacketResult 1202 GDBRemoteCommunicationServer::SendErrorResponse (uint8_t err) 1203 { 1204 char packet[16]; 1205 int packet_len = ::snprintf (packet, sizeof(packet), "E%2.2x", err); 1206 assert (packet_len < (int)sizeof(packet)); 1207 return SendPacketNoLock (packet, packet_len); 1208 } 1209 1210 GDBRemoteCommunication::PacketResult 1211 GDBRemoteCommunicationServer::SendIllFormedResponse (const StringExtractorGDBRemote &failed_packet, const char *message) 1212 { 1213 Log *log (ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PACKETS)); 1214 if (log) 1215 log->Printf ("GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)", __FUNCTION__, failed_packet.GetStringRef ().c_str (), message ? message : ""); 1216 return SendErrorResponse (0x03); 1217 } 1218 1219 GDBRemoteCommunication::PacketResult 1220 GDBRemoteCommunicationServer::SendOKResponse () 1221 { 1222 return SendPacketNoLock ("OK", 2); 1223 } 1224 1225 bool 1226 GDBRemoteCommunicationServer::HandshakeWithClient(Error *error_ptr) 1227 { 1228 return GetAck() == PacketResult::Success; 1229 } 1230 1231 GDBRemoteCommunication::PacketResult 1232 GDBRemoteCommunicationServer::Handle_qHostInfo (StringExtractorGDBRemote &packet) 1233 { 1234 StreamString response; 1235 1236 // $cputype:16777223;cpusubtype:3;ostype:Darwin;vendor:apple;endian:little;ptrsize:8;#00 1237 1238 ArchSpec host_arch(HostInfo::GetArchitecture()); 1239 const llvm::Triple &host_triple = host_arch.GetTriple(); 1240 response.PutCString("triple:"); 1241 response.PutCStringAsRawHex8(host_triple.getTriple().c_str()); 1242 response.Printf (";ptrsize:%u;",host_arch.GetAddressByteSize()); 1243 1244 const char* distribution_id = host_arch.GetDistributionId ().AsCString (); 1245 if (distribution_id) 1246 { 1247 response.PutCString("distribution_id:"); 1248 response.PutCStringAsRawHex8(distribution_id); 1249 response.PutCString(";"); 1250 } 1251 1252 // Only send out MachO info when lldb-platform/llgs is running on a MachO host. 1253 #if defined(__APPLE__) 1254 uint32_t cpu = host_arch.GetMachOCPUType(); 1255 uint32_t sub = host_arch.GetMachOCPUSubType(); 1256 if (cpu != LLDB_INVALID_CPUTYPE) 1257 response.Printf ("cputype:%u;", cpu); 1258 if (sub != LLDB_INVALID_CPUTYPE) 1259 response.Printf ("cpusubtype:%u;", sub); 1260 1261 if (cpu == ArchSpec::kCore_arm_any) 1262 response.Printf("watchpoint_exceptions_received:before;"); // On armv7 we use "synchronous" watchpoints which means the exception is delivered before the instruction executes. 1263 else 1264 response.Printf("watchpoint_exceptions_received:after;"); 1265 #else 1266 response.Printf("watchpoint_exceptions_received:after;"); 1267 #endif 1268 1269 switch (lldb::endian::InlHostByteOrder()) 1270 { 1271 case eByteOrderBig: response.PutCString ("endian:big;"); break; 1272 case eByteOrderLittle: response.PutCString ("endian:little;"); break; 1273 case eByteOrderPDP: response.PutCString ("endian:pdp;"); break; 1274 default: response.PutCString ("endian:unknown;"); break; 1275 } 1276 1277 uint32_t major = UINT32_MAX; 1278 uint32_t minor = UINT32_MAX; 1279 uint32_t update = UINT32_MAX; 1280 if (HostInfo::GetOSVersion(major, minor, update)) 1281 { 1282 if (major != UINT32_MAX) 1283 { 1284 response.Printf("os_version:%u", major); 1285 if (minor != UINT32_MAX) 1286 { 1287 response.Printf(".%u", minor); 1288 if (update != UINT32_MAX) 1289 response.Printf(".%u", update); 1290 } 1291 response.PutChar(';'); 1292 } 1293 } 1294 1295 std::string s; 1296 if (HostInfo::GetOSBuildString(s)) 1297 { 1298 response.PutCString ("os_build:"); 1299 response.PutCStringAsRawHex8(s.c_str()); 1300 response.PutChar(';'); 1301 } 1302 if (HostInfo::GetOSKernelDescription(s)) 1303 { 1304 response.PutCString ("os_kernel:"); 1305 response.PutCStringAsRawHex8(s.c_str()); 1306 response.PutChar(';'); 1307 } 1308 1309 #if defined(__APPLE__) 1310 1311 #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1312 // For iOS devices, we are connected through a USB Mux so we never pretend 1313 // to actually have a hostname as far as the remote lldb that is connecting 1314 // to this lldb-platform is concerned 1315 response.PutCString ("hostname:"); 1316 response.PutCStringAsRawHex8("127.0.0.1"); 1317 response.PutChar(';'); 1318 #else // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1319 if (HostInfo::GetHostname(s)) 1320 { 1321 response.PutCString ("hostname:"); 1322 response.PutCStringAsRawHex8(s.c_str()); 1323 response.PutChar(';'); 1324 } 1325 #endif // #if defined(__arm__) || defined(__arm64__) || defined(__aarch64__) 1326 1327 #else // #if defined(__APPLE__) 1328 if (HostInfo::GetHostname(s)) 1329 { 1330 response.PutCString ("hostname:"); 1331 response.PutCStringAsRawHex8(s.c_str()); 1332 response.PutChar(';'); 1333 } 1334 #endif // #if defined(__APPLE__) 1335 1336 return SendPacketNoLock (response.GetData(), response.GetSize()); 1337 } 1338 1339 static void 1340 CreateProcessInfoResponse (const ProcessInstanceInfo &proc_info, StreamString &response) 1341 { 1342 response.Printf ("pid:%" PRIu64 ";ppid:%" PRIu64 ";uid:%i;gid:%i;euid:%i;egid:%i;", 1343 proc_info.GetProcessID(), 1344 proc_info.GetParentProcessID(), 1345 proc_info.GetUserID(), 1346 proc_info.GetGroupID(), 1347 proc_info.GetEffectiveUserID(), 1348 proc_info.GetEffectiveGroupID()); 1349 response.PutCString ("name:"); 1350 response.PutCStringAsRawHex8(proc_info.GetName()); 1351 response.PutChar(';'); 1352 const ArchSpec &proc_arch = proc_info.GetArchitecture(); 1353 if (proc_arch.IsValid()) 1354 { 1355 const llvm::Triple &proc_triple = proc_arch.GetTriple(); 1356 response.PutCString("triple:"); 1357 response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); 1358 response.PutChar(';'); 1359 } 1360 } 1361 1362 static void 1363 CreateProcessInfoResponse_DebugServerStyle (const ProcessInstanceInfo &proc_info, StreamString &response) 1364 { 1365 response.Printf ("pid:%" PRIx64 ";parent-pid:%" PRIx64 ";real-uid:%x;real-gid:%x;effective-uid:%x;effective-gid:%x;", 1366 proc_info.GetProcessID(), 1367 proc_info.GetParentProcessID(), 1368 proc_info.GetUserID(), 1369 proc_info.GetGroupID(), 1370 proc_info.GetEffectiveUserID(), 1371 proc_info.GetEffectiveGroupID()); 1372 1373 const ArchSpec &proc_arch = proc_info.GetArchitecture(); 1374 if (proc_arch.IsValid()) 1375 { 1376 const llvm::Triple &proc_triple = proc_arch.GetTriple(); 1377 #if defined(__APPLE__) 1378 // We'll send cputype/cpusubtype. 1379 const uint32_t cpu_type = proc_arch.GetMachOCPUType(); 1380 if (cpu_type != 0) 1381 response.Printf ("cputype:%" PRIx32 ";", cpu_type); 1382 1383 const uint32_t cpu_subtype = proc_arch.GetMachOCPUSubType(); 1384 if (cpu_subtype != 0) 1385 response.Printf ("cpusubtype:%" PRIx32 ";", cpu_subtype); 1386 1387 1388 const std::string vendor = proc_triple.getVendorName (); 1389 if (!vendor.empty ()) 1390 response.Printf ("vendor:%s;", vendor.c_str ()); 1391 #else 1392 // We'll send the triple. 1393 response.PutCString("triple:"); 1394 response.PutCStringAsRawHex8(proc_triple.getTriple().c_str()); 1395 response.PutChar(';'); 1396 1397 #endif 1398 std::string ostype = proc_triple.getOSName (); 1399 // Adjust so ostype reports ios for Apple/ARM and Apple/ARM64. 1400 if (proc_triple.getVendor () == llvm::Triple::Apple) 1401 { 1402 switch (proc_triple.getArch ()) 1403 { 1404 case llvm::Triple::arm: 1405 case llvm::Triple::aarch64: 1406 ostype = "ios"; 1407 break; 1408 default: 1409 // No change. 1410 break; 1411 } 1412 } 1413 response.Printf ("ostype:%s;", ostype.c_str ()); 1414 1415 1416 switch (proc_arch.GetByteOrder ()) 1417 { 1418 case lldb::eByteOrderLittle: response.PutCString ("endian:little;"); break; 1419 case lldb::eByteOrderBig: response.PutCString ("endian:big;"); break; 1420 case lldb::eByteOrderPDP: response.PutCString ("endian:pdp;"); break; 1421 default: 1422 // Nothing. 1423 break; 1424 } 1425 1426 if (proc_triple.isArch64Bit ()) 1427 response.PutCString ("ptrsize:8;"); 1428 else if (proc_triple.isArch32Bit ()) 1429 response.PutCString ("ptrsize:4;"); 1430 else if (proc_triple.isArch16Bit ()) 1431 response.PutCString ("ptrsize:2;"); 1432 } 1433 1434 } 1435 1436 1437 GDBRemoteCommunication::PacketResult 1438 GDBRemoteCommunicationServer::Handle_qProcessInfo (StringExtractorGDBRemote &packet) 1439 { 1440 // Only the gdb server handles this. 1441 if (!IsGdbServer ()) 1442 return SendUnimplementedResponse (packet.GetStringRef ().c_str ()); 1443 1444 // Fail if we don't have a current process. 1445 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 1446 return SendErrorResponse (68); 1447 1448 ProcessInstanceInfo proc_info; 1449 if (Host::GetProcessInfo (m_debugged_process_sp->GetID (), proc_info)) 1450 { 1451 StreamString response; 1452 CreateProcessInfoResponse_DebugServerStyle(proc_info, response); 1453 return SendPacketNoLock (response.GetData (), response.GetSize ()); 1454 } 1455 1456 return SendErrorResponse (1); 1457 } 1458 1459 GDBRemoteCommunication::PacketResult 1460 GDBRemoteCommunicationServer::Handle_qProcessInfoPID (StringExtractorGDBRemote &packet) 1461 { 1462 // Packet format: "qProcessInfoPID:%i" where %i is the pid 1463 packet.SetFilePos(::strlen ("qProcessInfoPID:")); 1464 lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID); 1465 if (pid != LLDB_INVALID_PROCESS_ID) 1466 { 1467 ProcessInstanceInfo proc_info; 1468 if (Host::GetProcessInfo(pid, proc_info)) 1469 { 1470 StreamString response; 1471 CreateProcessInfoResponse (proc_info, response); 1472 return SendPacketNoLock (response.GetData(), response.GetSize()); 1473 } 1474 } 1475 return SendErrorResponse (1); 1476 } 1477 1478 GDBRemoteCommunication::PacketResult 1479 GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet) 1480 { 1481 m_proc_infos_index = 0; 1482 m_proc_infos.Clear(); 1483 1484 ProcessInstanceInfoMatch match_info; 1485 packet.SetFilePos(::strlen ("qfProcessInfo")); 1486 if (packet.GetChar() == ':') 1487 { 1488 1489 std::string key; 1490 std::string value; 1491 while (packet.GetNameColonValue(key, value)) 1492 { 1493 bool success = true; 1494 if (key.compare("name") == 0) 1495 { 1496 StringExtractor extractor; 1497 extractor.GetStringRef().swap(value); 1498 extractor.GetHexByteString (value); 1499 match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false); 1500 } 1501 else if (key.compare("name_match") == 0) 1502 { 1503 if (value.compare("equals") == 0) 1504 { 1505 match_info.SetNameMatchType (eNameMatchEquals); 1506 } 1507 else if (value.compare("starts_with") == 0) 1508 { 1509 match_info.SetNameMatchType (eNameMatchStartsWith); 1510 } 1511 else if (value.compare("ends_with") == 0) 1512 { 1513 match_info.SetNameMatchType (eNameMatchEndsWith); 1514 } 1515 else if (value.compare("contains") == 0) 1516 { 1517 match_info.SetNameMatchType (eNameMatchContains); 1518 } 1519 else if (value.compare("regex") == 0) 1520 { 1521 match_info.SetNameMatchType (eNameMatchRegularExpression); 1522 } 1523 else 1524 { 1525 success = false; 1526 } 1527 } 1528 else if (key.compare("pid") == 0) 1529 { 1530 match_info.GetProcessInfo().SetProcessID (StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); 1531 } 1532 else if (key.compare("parent_pid") == 0) 1533 { 1534 match_info.GetProcessInfo().SetParentProcessID (StringConvert::ToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success)); 1535 } 1536 else if (key.compare("uid") == 0) 1537 { 1538 match_info.GetProcessInfo().SetUserID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1539 } 1540 else if (key.compare("gid") == 0) 1541 { 1542 match_info.GetProcessInfo().SetGroupID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1543 } 1544 else if (key.compare("euid") == 0) 1545 { 1546 match_info.GetProcessInfo().SetEffectiveUserID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1547 } 1548 else if (key.compare("egid") == 0) 1549 { 1550 match_info.GetProcessInfo().SetEffectiveGroupID (StringConvert::ToUInt32(value.c_str(), UINT32_MAX, 0, &success)); 1551 } 1552 else if (key.compare("all_users") == 0) 1553 { 1554 match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success)); 1555 } 1556 else if (key.compare("triple") == 0) 1557 { 1558 match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL); 1559 } 1560 else 1561 { 1562 success = false; 1563 } 1564 1565 if (!success) 1566 return SendErrorResponse (2); 1567 } 1568 } 1569 1570 if (Host::FindProcesses (match_info, m_proc_infos)) 1571 { 1572 // We found something, return the first item by calling the get 1573 // subsequent process info packet handler... 1574 return Handle_qsProcessInfo (packet); 1575 } 1576 return SendErrorResponse (3); 1577 } 1578 1579 GDBRemoteCommunication::PacketResult 1580 GDBRemoteCommunicationServer::Handle_qsProcessInfo (StringExtractorGDBRemote &packet) 1581 { 1582 if (m_proc_infos_index < m_proc_infos.GetSize()) 1583 { 1584 StreamString response; 1585 CreateProcessInfoResponse (m_proc_infos.GetProcessInfoAtIndex(m_proc_infos_index), response); 1586 ++m_proc_infos_index; 1587 return SendPacketNoLock (response.GetData(), response.GetSize()); 1588 } 1589 return SendErrorResponse (4); 1590 } 1591 1592 GDBRemoteCommunication::PacketResult 1593 GDBRemoteCommunicationServer::Handle_qUserName (StringExtractorGDBRemote &packet) 1594 { 1595 #if !defined(LLDB_DISABLE_POSIX) 1596 // Packet format: "qUserName:%i" where %i is the uid 1597 packet.SetFilePos(::strlen ("qUserName:")); 1598 uint32_t uid = packet.GetU32 (UINT32_MAX); 1599 if (uid != UINT32_MAX) 1600 { 1601 std::string name; 1602 if (HostInfo::LookupUserName(uid, name)) 1603 { 1604 StreamString response; 1605 response.PutCStringAsRawHex8 (name.c_str()); 1606 return SendPacketNoLock (response.GetData(), response.GetSize()); 1607 } 1608 } 1609 #endif 1610 return SendErrorResponse (5); 1611 1612 } 1613 1614 GDBRemoteCommunication::PacketResult 1615 GDBRemoteCommunicationServer::Handle_qGroupName (StringExtractorGDBRemote &packet) 1616 { 1617 #if !defined(LLDB_DISABLE_POSIX) 1618 // Packet format: "qGroupName:%i" where %i is the gid 1619 packet.SetFilePos(::strlen ("qGroupName:")); 1620 uint32_t gid = packet.GetU32 (UINT32_MAX); 1621 if (gid != UINT32_MAX) 1622 { 1623 std::string name; 1624 if (HostInfo::LookupGroupName(gid, name)) 1625 { 1626 StreamString response; 1627 response.PutCStringAsRawHex8 (name.c_str()); 1628 return SendPacketNoLock (response.GetData(), response.GetSize()); 1629 } 1630 } 1631 #endif 1632 return SendErrorResponse (6); 1633 } 1634 1635 GDBRemoteCommunication::PacketResult 1636 GDBRemoteCommunicationServer::Handle_qSpeedTest (StringExtractorGDBRemote &packet) 1637 { 1638 packet.SetFilePos(::strlen ("qSpeedTest:")); 1639 1640 std::string key; 1641 std::string value; 1642 bool success = packet.GetNameColonValue(key, value); 1643 if (success && key.compare("response_size") == 0) 1644 { 1645 uint32_t response_size = StringConvert::ToUInt32(value.c_str(), 0, 0, &success); 1646 if (success) 1647 { 1648 if (response_size == 0) 1649 return SendOKResponse(); 1650 StreamString response; 1651 uint32_t bytes_left = response_size; 1652 response.PutCString("data:"); 1653 while (bytes_left > 0) 1654 { 1655 if (bytes_left >= 26) 1656 { 1657 response.PutCString("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 1658 bytes_left -= 26; 1659 } 1660 else 1661 { 1662 response.Printf ("%*.*s;", bytes_left, bytes_left, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"); 1663 bytes_left = 0; 1664 } 1665 } 1666 return SendPacketNoLock (response.GetData(), response.GetSize()); 1667 } 1668 } 1669 return SendErrorResponse (7); 1670 } 1671 1672 // 1673 //static bool 1674 //WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds) 1675 //{ 1676 // const int time_delta_usecs = 100000; 1677 // const int num_retries = timeout_in_seconds/time_delta_usecs; 1678 // for (int i=0; i<num_retries; i++) 1679 // { 1680 // struct proc_bsdinfo bsd_info; 1681 // int error = ::proc_pidinfo (pid, PROC_PIDTBSDINFO, 1682 // (uint64_t) 0, 1683 // &bsd_info, 1684 // PROC_PIDTBSDINFO_SIZE); 1685 // 1686 // switch (error) 1687 // { 1688 // case EINVAL: 1689 // case ENOTSUP: 1690 // case ESRCH: 1691 // case EPERM: 1692 // return false; 1693 // 1694 // default: 1695 // break; 1696 // 1697 // case 0: 1698 // if (bsd_info.pbi_status == SSTOP) 1699 // return true; 1700 // } 1701 // ::usleep (time_delta_usecs); 1702 // } 1703 // return false; 1704 //} 1705 1706 GDBRemoteCommunication::PacketResult 1707 GDBRemoteCommunicationServer::Handle_A (StringExtractorGDBRemote &packet) 1708 { 1709 // The 'A' packet is the most over designed packet ever here with 1710 // redundant argument indexes, redundant argument lengths and needed hex 1711 // encoded argument string values. Really all that is needed is a comma 1712 // separated hex encoded argument value list, but we will stay true to the 1713 // documented version of the 'A' packet here... 1714 1715 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1716 int actual_arg_index = 0; 1717 1718 packet.SetFilePos(1); // Skip the 'A' 1719 bool success = true; 1720 while (success && packet.GetBytesLeft() > 0) 1721 { 1722 // Decode the decimal argument string length. This length is the 1723 // number of hex nibbles in the argument string value. 1724 const uint32_t arg_len = packet.GetU32(UINT32_MAX); 1725 if (arg_len == UINT32_MAX) 1726 success = false; 1727 else 1728 { 1729 // Make sure the argument hex string length is followed by a comma 1730 if (packet.GetChar() != ',') 1731 success = false; 1732 else 1733 { 1734 // Decode the argument index. We ignore this really because 1735 // who would really send down the arguments in a random order??? 1736 const uint32_t arg_idx = packet.GetU32(UINT32_MAX); 1737 if (arg_idx == UINT32_MAX) 1738 success = false; 1739 else 1740 { 1741 // Make sure the argument index is followed by a comma 1742 if (packet.GetChar() != ',') 1743 success = false; 1744 else 1745 { 1746 // Decode the argument string value from hex bytes 1747 // back into a UTF8 string and make sure the length 1748 // matches the one supplied in the packet 1749 std::string arg; 1750 if (packet.GetHexByteStringFixedLength(arg, arg_len) != (arg_len / 2)) 1751 success = false; 1752 else 1753 { 1754 // If there are any bytes left 1755 if (packet.GetBytesLeft()) 1756 { 1757 if (packet.GetChar() != ',') 1758 success = false; 1759 } 1760 1761 if (success) 1762 { 1763 if (arg_idx == 0) 1764 m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false); 1765 m_process_launch_info.GetArguments().AppendArgument(arg.c_str()); 1766 if (log) 1767 log->Printf ("GDBRemoteCommunicationServer::%s added arg %d: \"%s\"", __FUNCTION__, actual_arg_index, arg.c_str ()); 1768 ++actual_arg_index; 1769 } 1770 } 1771 } 1772 } 1773 } 1774 } 1775 } 1776 1777 if (success) 1778 { 1779 m_process_launch_error = LaunchProcess (); 1780 if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) 1781 { 1782 return SendOKResponse (); 1783 } 1784 else 1785 { 1786 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 1787 if (log) 1788 log->Printf("GDBRemoteCommunicationServer::%s failed to launch exe: %s", 1789 __FUNCTION__, 1790 m_process_launch_error.AsCString()); 1791 1792 } 1793 } 1794 return SendErrorResponse (8); 1795 } 1796 1797 GDBRemoteCommunication::PacketResult 1798 GDBRemoteCommunicationServer::Handle_qC (StringExtractorGDBRemote &packet) 1799 { 1800 StreamString response; 1801 1802 if (IsGdbServer ()) 1803 { 1804 // Fail if we don't have a current process. 1805 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 1806 return SendErrorResponse (68); 1807 1808 // Make sure we set the current thread so g and p packets return 1809 // the data the gdb will expect. 1810 lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); 1811 SetCurrentThreadID (tid); 1812 1813 NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetCurrentThread (); 1814 if (!thread_sp) 1815 return SendErrorResponse (69); 1816 1817 response.Printf ("QC%" PRIx64, thread_sp->GetID ()); 1818 } 1819 else 1820 { 1821 // NOTE: lldb should now be using qProcessInfo for process IDs. This path here 1822 // should not be used. It is reporting process id instead of thread id. The 1823 // correct answer doesn't seem to make much sense for lldb-platform. 1824 // CONSIDER: flip to "unsupported". 1825 lldb::pid_t pid = m_process_launch_info.GetProcessID(); 1826 response.Printf("QC%" PRIx64, pid); 1827 1828 // this should always be platform here 1829 assert (m_is_platform && "this code path should only be traversed for lldb-platform"); 1830 1831 if (m_is_platform) 1832 { 1833 // If we launch a process and this GDB server is acting as a platform, 1834 // then we need to clear the process launch state so we can start 1835 // launching another process. In order to launch a process a bunch or 1836 // packets need to be sent: environment packets, working directory, 1837 // disable ASLR, and many more settings. When we launch a process we 1838 // then need to know when to clear this information. Currently we are 1839 // selecting the 'qC' packet as that packet which seems to make the most 1840 // sense. 1841 if (pid != LLDB_INVALID_PROCESS_ID) 1842 { 1843 m_process_launch_info.Clear(); 1844 } 1845 } 1846 } 1847 return SendPacketNoLock (response.GetData(), response.GetSize()); 1848 } 1849 1850 bool 1851 GDBRemoteCommunicationServer::DebugserverProcessReaped (lldb::pid_t pid) 1852 { 1853 Mutex::Locker locker (m_spawned_pids_mutex); 1854 FreePortForProcess(pid); 1855 return m_spawned_pids.erase(pid) > 0; 1856 } 1857 bool 1858 GDBRemoteCommunicationServer::ReapDebugserverProcess (void *callback_baton, 1859 lldb::pid_t pid, 1860 bool exited, 1861 int signal, // Zero for no signal 1862 int status) // Exit value of process if signal is zero 1863 { 1864 GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; 1865 server->DebugserverProcessReaped (pid); 1866 return true; 1867 } 1868 1869 bool 1870 GDBRemoteCommunicationServer::DebuggedProcessReaped (lldb::pid_t pid) 1871 { 1872 // reap a process that we were debugging (but not debugserver) 1873 Mutex::Locker locker (m_spawned_pids_mutex); 1874 return m_spawned_pids.erase(pid) > 0; 1875 } 1876 1877 bool 1878 GDBRemoteCommunicationServer::ReapDebuggedProcess (void *callback_baton, 1879 lldb::pid_t pid, 1880 bool exited, 1881 int signal, // Zero for no signal 1882 int status) // Exit value of process if signal is zero 1883 { 1884 GDBRemoteCommunicationServer *server = (GDBRemoteCommunicationServer *)callback_baton; 1885 server->DebuggedProcessReaped (pid); 1886 return true; 1887 } 1888 1889 GDBRemoteCommunication::PacketResult 1890 GDBRemoteCommunicationServer::Handle_qLaunchGDBServer (StringExtractorGDBRemote &packet) 1891 { 1892 #ifdef _WIN32 1893 return SendErrorResponse(9); 1894 #else 1895 Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM)); 1896 1897 // Spawn a local debugserver as a platform so we can then attach or launch 1898 // a process... 1899 1900 if (m_is_platform) 1901 { 1902 if (log) 1903 log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); 1904 1905 // Sleep and wait a bit for debugserver to start to listen... 1906 ConnectionFileDescriptor file_conn; 1907 std::string hostname; 1908 // TODO: /tmp/ should not be hardcoded. User might want to override /tmp 1909 // with the TMPDIR environment variable 1910 packet.SetFilePos(::strlen ("qLaunchGDBServer;")); 1911 std::string name; 1912 std::string value; 1913 uint16_t port = UINT16_MAX; 1914 while (packet.GetNameColonValue(name, value)) 1915 { 1916 if (name.compare ("host") == 0) 1917 hostname.swap(value); 1918 else if (name.compare ("port") == 0) 1919 port = StringConvert::ToUInt32(value.c_str(), 0, 0); 1920 } 1921 if (port == UINT16_MAX) 1922 port = GetNextAvailablePort(); 1923 1924 // Spawn a new thread to accept the port that gets bound after 1925 // binding to port 0 (zero). 1926 1927 // ignore the hostname send from the remote end, just use the ip address 1928 // that we're currently communicating with as the hostname 1929 1930 // Spawn a debugserver and try to get the port it listens to. 1931 ProcessLaunchInfo debugserver_launch_info; 1932 if (hostname.empty()) 1933 hostname = "127.0.0.1"; 1934 if (log) 1935 log->Printf("Launching debugserver with: %s:%u...\n", hostname.c_str(), port); 1936 1937 // Do not run in a new session so that it can not linger after the 1938 // platform closes. 1939 debugserver_launch_info.SetLaunchInSeparateProcessGroup(false); 1940 debugserver_launch_info.SetMonitorProcessCallback(ReapDebugserverProcess, this, false); 1941 1942 std::string platform_scheme; 1943 std::string platform_ip; 1944 int platform_port; 1945 std::string platform_path; 1946 bool ok = UriParser::Parse(GetConnection()->GetURI().c_str(), platform_scheme, platform_ip, platform_port, platform_path); 1947 assert(ok); 1948 Error error = StartDebugserverProcess ( 1949 platform_ip.c_str(), 1950 port, 1951 debugserver_launch_info, 1952 port); 1953 1954 lldb::pid_t debugserver_pid = debugserver_launch_info.GetProcessID(); 1955 1956 1957 if (debugserver_pid != LLDB_INVALID_PROCESS_ID) 1958 { 1959 Mutex::Locker locker (m_spawned_pids_mutex); 1960 m_spawned_pids.insert(debugserver_pid); 1961 if (port > 0) 1962 AssociatePortWithProcess(port, debugserver_pid); 1963 } 1964 else 1965 { 1966 if (port > 0) 1967 FreePort (port); 1968 } 1969 1970 if (error.Success()) 1971 { 1972 if (log) 1973 log->Printf ("GDBRemoteCommunicationServer::%s() debugserver launched successfully as pid %" PRIu64, __FUNCTION__, debugserver_pid); 1974 1975 char response[256]; 1976 const int response_len = ::snprintf (response, sizeof(response), "pid:%" PRIu64 ";port:%u;", debugserver_pid, port + m_port_offset); 1977 assert (response_len < (int)sizeof(response)); 1978 PacketResult packet_result = SendPacketNoLock (response, response_len); 1979 1980 if (packet_result != PacketResult::Success) 1981 { 1982 if (debugserver_pid != LLDB_INVALID_PROCESS_ID) 1983 ::kill (debugserver_pid, SIGINT); 1984 } 1985 return packet_result; 1986 } 1987 else 1988 { 1989 if (log) 1990 log->Printf ("GDBRemoteCommunicationServer::%s() debugserver launch failed: %s", __FUNCTION__, error.AsCString ()); 1991 } 1992 } 1993 return SendErrorResponse (9); 1994 #endif 1995 } 1996 1997 bool 1998 GDBRemoteCommunicationServer::KillSpawnedProcess (lldb::pid_t pid) 1999 { 2000 // make sure we know about this process 2001 { 2002 Mutex::Locker locker (m_spawned_pids_mutex); 2003 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2004 return false; 2005 } 2006 2007 // first try a SIGTERM (standard kill) 2008 Host::Kill (pid, SIGTERM); 2009 2010 // check if that worked 2011 for (size_t i=0; i<10; ++i) 2012 { 2013 { 2014 Mutex::Locker locker (m_spawned_pids_mutex); 2015 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2016 { 2017 // it is now killed 2018 return true; 2019 } 2020 } 2021 usleep (10000); 2022 } 2023 2024 // check one more time after the final usleep 2025 { 2026 Mutex::Locker locker (m_spawned_pids_mutex); 2027 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2028 return true; 2029 } 2030 2031 // the launched process still lives. Now try killing it again, 2032 // this time with an unblockable signal. 2033 Host::Kill (pid, SIGKILL); 2034 2035 for (size_t i=0; i<10; ++i) 2036 { 2037 { 2038 Mutex::Locker locker (m_spawned_pids_mutex); 2039 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2040 { 2041 // it is now killed 2042 return true; 2043 } 2044 } 2045 usleep (10000); 2046 } 2047 2048 // check one more time after the final usleep 2049 // Scope for locker 2050 { 2051 Mutex::Locker locker (m_spawned_pids_mutex); 2052 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2053 return true; 2054 } 2055 2056 // no luck - the process still lives 2057 return false; 2058 } 2059 2060 GDBRemoteCommunication::PacketResult 2061 GDBRemoteCommunicationServer::Handle_qKillSpawnedProcess (StringExtractorGDBRemote &packet) 2062 { 2063 packet.SetFilePos(::strlen ("qKillSpawnedProcess:")); 2064 2065 lldb::pid_t pid = packet.GetU64(LLDB_INVALID_PROCESS_ID); 2066 2067 // verify that we know anything about this pid. 2068 // Scope for locker 2069 { 2070 Mutex::Locker locker (m_spawned_pids_mutex); 2071 if (m_spawned_pids.find(pid) == m_spawned_pids.end()) 2072 { 2073 // not a pid we know about 2074 return SendErrorResponse (10); 2075 } 2076 } 2077 2078 // go ahead and attempt to kill the spawned process 2079 if (KillSpawnedProcess (pid)) 2080 return SendOKResponse (); 2081 else 2082 return SendErrorResponse (11); 2083 } 2084 2085 GDBRemoteCommunication::PacketResult 2086 GDBRemoteCommunicationServer::Handle_k (StringExtractorGDBRemote &packet) 2087 { 2088 // ignore for now if we're lldb_platform 2089 if (m_is_platform) 2090 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2091 2092 // shutdown all spawned processes 2093 std::set<lldb::pid_t> spawned_pids_copy; 2094 2095 // copy pids 2096 { 2097 Mutex::Locker locker (m_spawned_pids_mutex); 2098 spawned_pids_copy.insert (m_spawned_pids.begin (), m_spawned_pids.end ()); 2099 } 2100 2101 // nuke the spawned processes 2102 for (auto it = spawned_pids_copy.begin (); it != spawned_pids_copy.end (); ++it) 2103 { 2104 lldb::pid_t spawned_pid = *it; 2105 if (!KillSpawnedProcess (spawned_pid)) 2106 { 2107 fprintf (stderr, "%s: failed to kill spawned pid %" PRIu64 ", ignoring.\n", __FUNCTION__, spawned_pid); 2108 } 2109 } 2110 2111 FlushInferiorOutput (); 2112 2113 // No OK response for kill packet. 2114 // return SendOKResponse (); 2115 return PacketResult::Success; 2116 } 2117 2118 GDBRemoteCommunication::PacketResult 2119 GDBRemoteCommunicationServer::Handle_qLaunchSuccess (StringExtractorGDBRemote &packet) 2120 { 2121 if (m_process_launch_error.Success()) 2122 return SendOKResponse(); 2123 StreamString response; 2124 response.PutChar('E'); 2125 response.PutCString(m_process_launch_error.AsCString("<unknown error>")); 2126 return SendPacketNoLock (response.GetData(), response.GetSize()); 2127 } 2128 2129 GDBRemoteCommunication::PacketResult 2130 GDBRemoteCommunicationServer::Handle_QEnvironment (StringExtractorGDBRemote &packet) 2131 { 2132 packet.SetFilePos(::strlen ("QEnvironment:")); 2133 const uint32_t bytes_left = packet.GetBytesLeft(); 2134 if (bytes_left > 0) 2135 { 2136 m_process_launch_info.GetEnvironmentEntries ().AppendArgument (packet.Peek()); 2137 return SendOKResponse (); 2138 } 2139 return SendErrorResponse (12); 2140 } 2141 2142 GDBRemoteCommunication::PacketResult 2143 GDBRemoteCommunicationServer::Handle_QLaunchArch (StringExtractorGDBRemote &packet) 2144 { 2145 packet.SetFilePos(::strlen ("QLaunchArch:")); 2146 const uint32_t bytes_left = packet.GetBytesLeft(); 2147 if (bytes_left > 0) 2148 { 2149 const char* arch_triple = packet.Peek(); 2150 ArchSpec arch_spec(arch_triple,NULL); 2151 m_process_launch_info.SetArchitecture(arch_spec); 2152 return SendOKResponse(); 2153 } 2154 return SendErrorResponse(13); 2155 } 2156 2157 GDBRemoteCommunication::PacketResult 2158 GDBRemoteCommunicationServer::Handle_QSetDisableASLR (StringExtractorGDBRemote &packet) 2159 { 2160 packet.SetFilePos(::strlen ("QSetDisableASLR:")); 2161 if (packet.GetU32(0)) 2162 m_process_launch_info.GetFlags().Set (eLaunchFlagDisableASLR); 2163 else 2164 m_process_launch_info.GetFlags().Clear (eLaunchFlagDisableASLR); 2165 return SendOKResponse (); 2166 } 2167 2168 GDBRemoteCommunication::PacketResult 2169 GDBRemoteCommunicationServer::Handle_QSetWorkingDir (StringExtractorGDBRemote &packet) 2170 { 2171 packet.SetFilePos(::strlen ("QSetWorkingDir:")); 2172 std::string path; 2173 packet.GetHexByteString(path); 2174 if (m_is_platform) 2175 { 2176 #ifdef _WIN32 2177 // Not implemented on Windows 2178 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_QSetWorkingDir unimplemented"); 2179 #else 2180 // If this packet is sent to a platform, then change the current working directory 2181 if (::chdir(path.c_str()) != 0) 2182 return SendErrorResponse(errno); 2183 #endif 2184 } 2185 else 2186 { 2187 m_process_launch_info.SwapWorkingDirectory (path); 2188 } 2189 return SendOKResponse (); 2190 } 2191 2192 GDBRemoteCommunication::PacketResult 2193 GDBRemoteCommunicationServer::Handle_qGetWorkingDir (StringExtractorGDBRemote &packet) 2194 { 2195 StreamString response; 2196 2197 if (m_is_platform) 2198 { 2199 // If this packet is sent to a platform, then change the current working directory 2200 char cwd[PATH_MAX]; 2201 if (getcwd(cwd, sizeof(cwd)) == NULL) 2202 { 2203 return SendErrorResponse(errno); 2204 } 2205 else 2206 { 2207 response.PutBytesAsRawHex8(cwd, strlen(cwd)); 2208 return SendPacketNoLock(response.GetData(), response.GetSize()); 2209 } 2210 } 2211 else 2212 { 2213 const char *working_dir = m_process_launch_info.GetWorkingDirectory(); 2214 if (working_dir && working_dir[0]) 2215 { 2216 response.PutBytesAsRawHex8(working_dir, strlen(working_dir)); 2217 return SendPacketNoLock(response.GetData(), response.GetSize()); 2218 } 2219 else 2220 { 2221 return SendErrorResponse(14); 2222 } 2223 } 2224 } 2225 2226 GDBRemoteCommunication::PacketResult 2227 GDBRemoteCommunicationServer::Handle_QSetSTDIN (StringExtractorGDBRemote &packet) 2228 { 2229 packet.SetFilePos(::strlen ("QSetSTDIN:")); 2230 FileAction file_action; 2231 std::string path; 2232 packet.GetHexByteString(path); 2233 const bool read = false; 2234 const bool write = true; 2235 if (file_action.Open(STDIN_FILENO, path.c_str(), read, write)) 2236 { 2237 m_process_launch_info.AppendFileAction(file_action); 2238 return SendOKResponse (); 2239 } 2240 return SendErrorResponse (15); 2241 } 2242 2243 GDBRemoteCommunication::PacketResult 2244 GDBRemoteCommunicationServer::Handle_QSetSTDOUT (StringExtractorGDBRemote &packet) 2245 { 2246 packet.SetFilePos(::strlen ("QSetSTDOUT:")); 2247 FileAction file_action; 2248 std::string path; 2249 packet.GetHexByteString(path); 2250 const bool read = true; 2251 const bool write = false; 2252 if (file_action.Open(STDOUT_FILENO, path.c_str(), read, write)) 2253 { 2254 m_process_launch_info.AppendFileAction(file_action); 2255 return SendOKResponse (); 2256 } 2257 return SendErrorResponse (16); 2258 } 2259 2260 GDBRemoteCommunication::PacketResult 2261 GDBRemoteCommunicationServer::Handle_QSetSTDERR (StringExtractorGDBRemote &packet) 2262 { 2263 packet.SetFilePos(::strlen ("QSetSTDERR:")); 2264 FileAction file_action; 2265 std::string path; 2266 packet.GetHexByteString(path); 2267 const bool read = true; 2268 const bool write = false; 2269 if (file_action.Open(STDERR_FILENO, path.c_str(), read, write)) 2270 { 2271 m_process_launch_info.AppendFileAction(file_action); 2272 return SendOKResponse (); 2273 } 2274 return SendErrorResponse (17); 2275 } 2276 2277 GDBRemoteCommunication::PacketResult 2278 GDBRemoteCommunicationServer::Handle_C (StringExtractorGDBRemote &packet) 2279 { 2280 if (!IsGdbServer ()) 2281 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2282 2283 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 2284 if (log) 2285 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 2286 2287 // Ensure we have a native process. 2288 if (!m_debugged_process_sp) 2289 { 2290 if (log) 2291 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2292 return SendErrorResponse (0x36); 2293 } 2294 2295 // Pull out the signal number. 2296 packet.SetFilePos (::strlen ("C")); 2297 if (packet.GetBytesLeft () < 1) 2298 { 2299 // Shouldn't be using a C without a signal. 2300 return SendIllFormedResponse (packet, "C packet specified without signal."); 2301 } 2302 const uint32_t signo = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 2303 if (signo == std::numeric_limits<uint32_t>::max ()) 2304 return SendIllFormedResponse (packet, "failed to parse signal number"); 2305 2306 // Handle optional continue address. 2307 if (packet.GetBytesLeft () > 0) 2308 { 2309 // FIXME add continue at address support for $C{signo}[;{continue-address}]. 2310 if (*packet.Peek () == ';') 2311 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2312 else 2313 return SendIllFormedResponse (packet, "unexpected content after $C{signal-number}"); 2314 } 2315 2316 lldb_private::ResumeActionList resume_actions (StateType::eStateRunning, 0); 2317 Error error; 2318 2319 // We have two branches: what to do if a continue thread is specified (in which case we target 2320 // sending the signal to that thread), or when we don't have a continue thread set (in which 2321 // case we send a signal to the process). 2322 2323 // TODO discuss with Greg Clayton, make sure this makes sense. 2324 2325 lldb::tid_t signal_tid = GetContinueThreadID (); 2326 if (signal_tid != LLDB_INVALID_THREAD_ID) 2327 { 2328 // The resume action for the continue thread (or all threads if a continue thread is not set). 2329 lldb_private::ResumeAction action = { GetContinueThreadID (), StateType::eStateRunning, static_cast<int> (signo) }; 2330 2331 // Add the action for the continue thread (or all threads when the continue thread isn't present). 2332 resume_actions.Append (action); 2333 } 2334 else 2335 { 2336 // Send the signal to the process since we weren't targeting a specific continue thread with the signal. 2337 error = m_debugged_process_sp->Signal (signo); 2338 if (error.Fail ()) 2339 { 2340 if (log) 2341 log->Printf ("GDBRemoteCommunicationServer::%s failed to send signal for process %" PRIu64 ": %s", 2342 __FUNCTION__, 2343 m_debugged_process_sp->GetID (), 2344 error.AsCString ()); 2345 2346 return SendErrorResponse (0x52); 2347 } 2348 } 2349 2350 // Resume the threads. 2351 error = m_debugged_process_sp->Resume (resume_actions); 2352 if (error.Fail ()) 2353 { 2354 if (log) 2355 log->Printf ("GDBRemoteCommunicationServer::%s failed to resume threads for process %" PRIu64 ": %s", 2356 __FUNCTION__, 2357 m_debugged_process_sp->GetID (), 2358 error.AsCString ()); 2359 2360 return SendErrorResponse (0x38); 2361 } 2362 2363 // Don't send an "OK" packet; response is the stopped/exited message. 2364 return PacketResult::Success; 2365 } 2366 2367 GDBRemoteCommunication::PacketResult 2368 GDBRemoteCommunicationServer::Handle_c (StringExtractorGDBRemote &packet, bool skip_file_pos_adjustment) 2369 { 2370 if (!IsGdbServer ()) 2371 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2372 2373 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 2374 if (log) 2375 log->Printf ("GDBRemoteCommunicationServer::%s called", __FUNCTION__); 2376 2377 // We reuse this method in vCont - don't double adjust the file position. 2378 if (!skip_file_pos_adjustment) 2379 packet.SetFilePos (::strlen ("c")); 2380 2381 // For now just support all continue. 2382 const bool has_continue_address = (packet.GetBytesLeft () > 0); 2383 if (has_continue_address) 2384 { 2385 if (log) 2386 log->Printf ("GDBRemoteCommunicationServer::%s not implemented for c{address} variant [%s remains]", __FUNCTION__, packet.Peek ()); 2387 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2388 } 2389 2390 // Ensure we have a native process. 2391 if (!m_debugged_process_sp) 2392 { 2393 if (log) 2394 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2395 return SendErrorResponse (0x36); 2396 } 2397 2398 // Build the ResumeActionList 2399 lldb_private::ResumeActionList actions (StateType::eStateRunning, 0); 2400 2401 Error error = m_debugged_process_sp->Resume (actions); 2402 if (error.Fail ()) 2403 { 2404 if (log) 2405 { 2406 log->Printf ("GDBRemoteCommunicationServer::%s c failed for process %" PRIu64 ": %s", 2407 __FUNCTION__, 2408 m_debugged_process_sp->GetID (), 2409 error.AsCString ()); 2410 } 2411 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 2412 } 2413 2414 if (log) 2415 log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 2416 2417 // No response required from continue. 2418 return PacketResult::Success; 2419 } 2420 2421 GDBRemoteCommunication::PacketResult 2422 GDBRemoteCommunicationServer::Handle_vCont_actions (StringExtractorGDBRemote &packet) 2423 { 2424 if (!IsGdbServer ()) 2425 { 2426 // only llgs supports $vCont. 2427 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2428 } 2429 2430 StreamString response; 2431 response.Printf("vCont;c;C;s;S"); 2432 2433 return SendPacketNoLock(response.GetData(), response.GetSize()); 2434 } 2435 2436 GDBRemoteCommunication::PacketResult 2437 GDBRemoteCommunicationServer::Handle_vCont (StringExtractorGDBRemote &packet) 2438 { 2439 if (!IsGdbServer ()) 2440 { 2441 // only llgs supports $vCont 2442 return SendUnimplementedResponse (packet.GetStringRef().c_str()); 2443 } 2444 2445 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 2446 if (log) 2447 log->Printf ("GDBRemoteCommunicationServer::%s handling vCont packet", __FUNCTION__); 2448 2449 packet.SetFilePos (::strlen ("vCont")); 2450 2451 // Check if this is all continue (no options or ";c"). 2452 if (!packet.GetBytesLeft () || (::strcmp (packet.Peek (), ";c") == 0)) 2453 { 2454 // Move the packet past the ";c". 2455 if (packet.GetBytesLeft ()) 2456 packet.SetFilePos (packet.GetFilePos () + ::strlen (";c")); 2457 2458 const bool skip_file_pos_adjustment = true; 2459 return Handle_c (packet, skip_file_pos_adjustment); 2460 } 2461 else if (::strcmp (packet.Peek (), ";s") == 0) 2462 { 2463 // Move past the ';', then do a simple 's'. 2464 packet.SetFilePos (packet.GetFilePos () + 1); 2465 return Handle_s (packet); 2466 } 2467 2468 // Ensure we have a native process. 2469 if (!m_debugged_process_sp) 2470 { 2471 if (log) 2472 log->Printf ("GDBRemoteCommunicationServer::%s no debugged process shared pointer", __FUNCTION__); 2473 return SendErrorResponse (0x36); 2474 } 2475 2476 ResumeActionList thread_actions; 2477 2478 while (packet.GetBytesLeft () && *packet.Peek () == ';') 2479 { 2480 // Skip the semi-colon. 2481 packet.GetChar (); 2482 2483 // Build up the thread action. 2484 ResumeAction thread_action; 2485 thread_action.tid = LLDB_INVALID_THREAD_ID; 2486 thread_action.state = eStateInvalid; 2487 thread_action.signal = 0; 2488 2489 const char action = packet.GetChar (); 2490 switch (action) 2491 { 2492 case 'C': 2493 thread_action.signal = packet.GetHexMaxU32 (false, 0); 2494 if (thread_action.signal == 0) 2495 return SendIllFormedResponse (packet, "Could not parse signal in vCont packet C action"); 2496 // Fall through to next case... 2497 2498 case 'c': 2499 // Continue 2500 thread_action.state = eStateRunning; 2501 break; 2502 2503 case 'S': 2504 thread_action.signal = packet.GetHexMaxU32 (false, 0); 2505 if (thread_action.signal == 0) 2506 return SendIllFormedResponse (packet, "Could not parse signal in vCont packet S action"); 2507 // Fall through to next case... 2508 2509 case 's': 2510 // Step 2511 thread_action.state = eStateStepping; 2512 break; 2513 2514 default: 2515 return SendIllFormedResponse (packet, "Unsupported vCont action"); 2516 break; 2517 } 2518 2519 // Parse out optional :{thread-id} value. 2520 if (packet.GetBytesLeft () && (*packet.Peek () == ':')) 2521 { 2522 // Consume the separator. 2523 packet.GetChar (); 2524 2525 thread_action.tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); 2526 if (thread_action.tid == LLDB_INVALID_THREAD_ID) 2527 return SendIllFormedResponse (packet, "Could not parse thread number in vCont packet"); 2528 } 2529 2530 thread_actions.Append (thread_action); 2531 } 2532 2533 Error error = m_debugged_process_sp->Resume (thread_actions); 2534 if (error.Fail ()) 2535 { 2536 if (log) 2537 { 2538 log->Printf ("GDBRemoteCommunicationServer::%s vCont failed for process %" PRIu64 ": %s", 2539 __FUNCTION__, 2540 m_debugged_process_sp->GetID (), 2541 error.AsCString ()); 2542 } 2543 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 2544 } 2545 2546 if (log) 2547 log->Printf ("GDBRemoteCommunicationServer::%s continued process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 2548 2549 // No response required from vCont. 2550 return PacketResult::Success; 2551 } 2552 2553 GDBRemoteCommunication::PacketResult 2554 GDBRemoteCommunicationServer::Handle_QStartNoAckMode (StringExtractorGDBRemote &packet) 2555 { 2556 // Send response first before changing m_send_acks to we ack this packet 2557 PacketResult packet_result = SendOKResponse (); 2558 m_send_acks = false; 2559 return packet_result; 2560 } 2561 2562 GDBRemoteCommunication::PacketResult 2563 GDBRemoteCommunicationServer::Handle_qPlatform_mkdir (StringExtractorGDBRemote &packet) 2564 { 2565 packet.SetFilePos(::strlen("qPlatform_mkdir:")); 2566 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); 2567 if (packet.GetChar() == ',') 2568 { 2569 std::string path; 2570 packet.GetHexByteString(path); 2571 Error error = FileSystem::MakeDirectory(path.c_str(), mode); 2572 if (error.Success()) 2573 return SendPacketNoLock ("OK", 2); 2574 else 2575 return SendErrorResponse(error.GetError()); 2576 } 2577 return SendErrorResponse(20); 2578 } 2579 2580 GDBRemoteCommunication::PacketResult 2581 GDBRemoteCommunicationServer::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet) 2582 { 2583 packet.SetFilePos(::strlen("qPlatform_chmod:")); 2584 2585 mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX); 2586 if (packet.GetChar() == ',') 2587 { 2588 std::string path; 2589 packet.GetHexByteString(path); 2590 Error error = FileSystem::SetFilePermissions(path.c_str(), mode); 2591 if (error.Success()) 2592 return SendPacketNoLock ("OK", 2); 2593 else 2594 return SendErrorResponse(error.GetError()); 2595 } 2596 return SendErrorResponse(19); 2597 } 2598 2599 GDBRemoteCommunication::PacketResult 2600 GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet) 2601 { 2602 packet.SetFilePos(::strlen("vFile:open:")); 2603 std::string path; 2604 packet.GetHexByteStringTerminatedBy(path,','); 2605 if (!path.empty()) 2606 { 2607 if (packet.GetChar() == ',') 2608 { 2609 uint32_t flags = packet.GetHexMaxU32(false, 0); 2610 if (packet.GetChar() == ',') 2611 { 2612 mode_t mode = packet.GetHexMaxU32(false, 0600); 2613 Error error; 2614 int fd = ::open (path.c_str(), flags, mode); 2615 const int save_errno = fd == -1 ? errno : 0; 2616 StreamString response; 2617 response.PutChar('F'); 2618 response.Printf("%i", fd); 2619 if (save_errno) 2620 response.Printf(",%i", save_errno); 2621 return SendPacketNoLock(response.GetData(), response.GetSize()); 2622 } 2623 } 2624 } 2625 return SendErrorResponse(18); 2626 } 2627 2628 GDBRemoteCommunication::PacketResult 2629 GDBRemoteCommunicationServer::Handle_vFile_Close (StringExtractorGDBRemote &packet) 2630 { 2631 packet.SetFilePos(::strlen("vFile:close:")); 2632 int fd = packet.GetS32(-1); 2633 Error error; 2634 int err = -1; 2635 int save_errno = 0; 2636 if (fd >= 0) 2637 { 2638 err = close(fd); 2639 save_errno = err == -1 ? errno : 0; 2640 } 2641 else 2642 { 2643 save_errno = EINVAL; 2644 } 2645 StreamString response; 2646 response.PutChar('F'); 2647 response.Printf("%i", err); 2648 if (save_errno) 2649 response.Printf(",%i", save_errno); 2650 return SendPacketNoLock(response.GetData(), response.GetSize()); 2651 } 2652 2653 GDBRemoteCommunication::PacketResult 2654 GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet) 2655 { 2656 #ifdef _WIN32 2657 // Not implemented on Windows 2658 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented"); 2659 #else 2660 StreamGDBRemote response; 2661 packet.SetFilePos(::strlen("vFile:pread:")); 2662 int fd = packet.GetS32(-1); 2663 if (packet.GetChar() == ',') 2664 { 2665 uint64_t count = packet.GetU64(UINT64_MAX); 2666 if (packet.GetChar() == ',') 2667 { 2668 uint64_t offset = packet.GetU64(UINT32_MAX); 2669 if (count == UINT64_MAX) 2670 { 2671 response.Printf("F-1:%i", EINVAL); 2672 return SendPacketNoLock(response.GetData(), response.GetSize()); 2673 } 2674 2675 std::string buffer(count, 0); 2676 const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset); 2677 const int save_errno = bytes_read == -1 ? errno : 0; 2678 response.PutChar('F'); 2679 response.Printf("%zi", bytes_read); 2680 if (save_errno) 2681 response.Printf(",%i", save_errno); 2682 else 2683 { 2684 response.PutChar(';'); 2685 response.PutEscapedBytes(&buffer[0], bytes_read); 2686 } 2687 return SendPacketNoLock(response.GetData(), response.GetSize()); 2688 } 2689 } 2690 return SendErrorResponse(21); 2691 2692 #endif 2693 } 2694 2695 GDBRemoteCommunication::PacketResult 2696 GDBRemoteCommunicationServer::Handle_vFile_pWrite (StringExtractorGDBRemote &packet) 2697 { 2698 #ifdef _WIN32 2699 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pWrite() unimplemented"); 2700 #else 2701 packet.SetFilePos(::strlen("vFile:pwrite:")); 2702 2703 StreamGDBRemote response; 2704 response.PutChar('F'); 2705 2706 int fd = packet.GetU32(UINT32_MAX); 2707 if (packet.GetChar() == ',') 2708 { 2709 off_t offset = packet.GetU64(UINT32_MAX); 2710 if (packet.GetChar() == ',') 2711 { 2712 std::string buffer; 2713 if (packet.GetEscapedBinaryData(buffer)) 2714 { 2715 const ssize_t bytes_written = ::pwrite (fd, buffer.data(), buffer.size(), offset); 2716 const int save_errno = bytes_written == -1 ? errno : 0; 2717 response.Printf("%zi", bytes_written); 2718 if (save_errno) 2719 response.Printf(",%i", save_errno); 2720 } 2721 else 2722 { 2723 response.Printf ("-1,%i", EINVAL); 2724 } 2725 return SendPacketNoLock(response.GetData(), response.GetSize()); 2726 } 2727 } 2728 return SendErrorResponse(27); 2729 #endif 2730 } 2731 2732 GDBRemoteCommunication::PacketResult 2733 GDBRemoteCommunicationServer::Handle_vFile_Size (StringExtractorGDBRemote &packet) 2734 { 2735 packet.SetFilePos(::strlen("vFile:size:")); 2736 std::string path; 2737 packet.GetHexByteString(path); 2738 if (!path.empty()) 2739 { 2740 lldb::user_id_t retcode = FileSystem::GetFileSize(FileSpec(path.c_str(), false)); 2741 StreamString response; 2742 response.PutChar('F'); 2743 response.PutHex64(retcode); 2744 if (retcode == UINT64_MAX) 2745 { 2746 response.PutChar(','); 2747 response.PutHex64(retcode); // TODO: replace with Host::GetSyswideErrorCode() 2748 } 2749 return SendPacketNoLock(response.GetData(), response.GetSize()); 2750 } 2751 return SendErrorResponse(22); 2752 } 2753 2754 GDBRemoteCommunication::PacketResult 2755 GDBRemoteCommunicationServer::Handle_vFile_Mode (StringExtractorGDBRemote &packet) 2756 { 2757 packet.SetFilePos(::strlen("vFile:mode:")); 2758 std::string path; 2759 packet.GetHexByteString(path); 2760 if (!path.empty()) 2761 { 2762 Error error; 2763 const uint32_t mode = File::GetPermissions(path.c_str(), error); 2764 StreamString response; 2765 response.Printf("F%u", mode); 2766 if (mode == 0 || error.Fail()) 2767 response.Printf(",%i", (int)error.GetError()); 2768 return SendPacketNoLock(response.GetData(), response.GetSize()); 2769 } 2770 return SendErrorResponse(23); 2771 } 2772 2773 GDBRemoteCommunication::PacketResult 2774 GDBRemoteCommunicationServer::Handle_vFile_Exists (StringExtractorGDBRemote &packet) 2775 { 2776 packet.SetFilePos(::strlen("vFile:exists:")); 2777 std::string path; 2778 packet.GetHexByteString(path); 2779 if (!path.empty()) 2780 { 2781 bool retcode = FileSystem::GetFileExists(FileSpec(path.c_str(), false)); 2782 StreamString response; 2783 response.PutChar('F'); 2784 response.PutChar(','); 2785 if (retcode) 2786 response.PutChar('1'); 2787 else 2788 response.PutChar('0'); 2789 return SendPacketNoLock(response.GetData(), response.GetSize()); 2790 } 2791 return SendErrorResponse(24); 2792 } 2793 2794 GDBRemoteCommunication::PacketResult 2795 GDBRemoteCommunicationServer::Handle_vFile_symlink (StringExtractorGDBRemote &packet) 2796 { 2797 packet.SetFilePos(::strlen("vFile:symlink:")); 2798 std::string dst, src; 2799 packet.GetHexByteStringTerminatedBy(dst, ','); 2800 packet.GetChar(); // Skip ',' char 2801 packet.GetHexByteString(src); 2802 Error error = FileSystem::Symlink(src.c_str(), dst.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_vFile_unlink (StringExtractorGDBRemote &packet) 2810 { 2811 packet.SetFilePos(::strlen("vFile:unlink:")); 2812 std::string path; 2813 packet.GetHexByteString(path); 2814 Error error = FileSystem::Unlink(path.c_str()); 2815 StreamString response; 2816 response.Printf("F%u,%u", error.GetError(), error.GetError()); 2817 return SendPacketNoLock(response.GetData(), response.GetSize()); 2818 } 2819 2820 GDBRemoteCommunication::PacketResult 2821 GDBRemoteCommunicationServer::Handle_qPlatform_shell (StringExtractorGDBRemote &packet) 2822 { 2823 packet.SetFilePos(::strlen("qPlatform_shell:")); 2824 std::string path; 2825 std::string working_dir; 2826 packet.GetHexByteStringTerminatedBy(path,','); 2827 if (!path.empty()) 2828 { 2829 if (packet.GetChar() == ',') 2830 { 2831 // FIXME: add timeout to qPlatform_shell packet 2832 // uint32_t timeout = packet.GetHexMaxU32(false, 32); 2833 uint32_t timeout = 10; 2834 if (packet.GetChar() == ',') 2835 packet.GetHexByteString(working_dir); 2836 int status, signo; 2837 std::string output; 2838 Error err = Host::RunShellCommand(path.c_str(), 2839 working_dir.empty() ? NULL : working_dir.c_str(), 2840 &status, &signo, &output, timeout); 2841 StreamGDBRemote response; 2842 if (err.Fail()) 2843 { 2844 response.PutCString("F,"); 2845 response.PutHex32(UINT32_MAX); 2846 } 2847 else 2848 { 2849 response.PutCString("F,"); 2850 response.PutHex32(status); 2851 response.PutChar(','); 2852 response.PutHex32(signo); 2853 response.PutChar(','); 2854 response.PutEscapedBytes(output.c_str(), output.size()); 2855 } 2856 return SendPacketNoLock(response.GetData(), response.GetSize()); 2857 } 2858 } 2859 return SendErrorResponse(24); 2860 } 2861 2862 void 2863 GDBRemoteCommunicationServer::SetCurrentThreadID (lldb::tid_t tid) 2864 { 2865 assert (IsGdbServer () && "SetCurrentThreadID() called when not GdbServer code"); 2866 2867 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); 2868 if (log) 2869 log->Printf ("GDBRemoteCommunicationServer::%s setting current thread id to %" PRIu64, __FUNCTION__, tid); 2870 2871 m_current_tid = tid; 2872 if (m_debugged_process_sp) 2873 m_debugged_process_sp->SetCurrentThreadID (m_current_tid); 2874 } 2875 2876 void 2877 GDBRemoteCommunicationServer::SetContinueThreadID (lldb::tid_t tid) 2878 { 2879 assert (IsGdbServer () && "SetContinueThreadID() called when not GdbServer code"); 2880 2881 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_THREAD)); 2882 if (log) 2883 log->Printf ("GDBRemoteCommunicationServer::%s setting continue thread id to %" PRIu64, __FUNCTION__, tid); 2884 2885 m_continue_tid = tid; 2886 } 2887 2888 GDBRemoteCommunication::PacketResult 2889 GDBRemoteCommunicationServer::Handle_stop_reason (StringExtractorGDBRemote &packet) 2890 { 2891 // Handle the $? gdbremote command. 2892 if (!IsGdbServer ()) 2893 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_stop_reason() unimplemented"); 2894 2895 // If no process, indicate error 2896 if (!m_debugged_process_sp) 2897 return SendErrorResponse (02); 2898 2899 return SendStopReasonForState (m_debugged_process_sp->GetState (), true); 2900 } 2901 2902 GDBRemoteCommunication::PacketResult 2903 GDBRemoteCommunicationServer::SendStopReasonForState (lldb::StateType process_state, bool flush_on_exit) 2904 { 2905 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 2906 2907 switch (process_state) 2908 { 2909 case eStateAttaching: 2910 case eStateLaunching: 2911 case eStateRunning: 2912 case eStateStepping: 2913 case eStateDetached: 2914 // NOTE: gdb protocol doc looks like it should return $OK 2915 // when everything is running (i.e. no stopped result). 2916 return PacketResult::Success; // Ignore 2917 2918 case eStateSuspended: 2919 case eStateStopped: 2920 case eStateCrashed: 2921 { 2922 lldb::tid_t tid = m_debugged_process_sp->GetCurrentThreadID (); 2923 // Make sure we set the current thread so g and p packets return 2924 // the data the gdb will expect. 2925 SetCurrentThreadID (tid); 2926 return SendStopReplyPacketForThread (tid); 2927 } 2928 2929 case eStateInvalid: 2930 case eStateUnloaded: 2931 case eStateExited: 2932 if (flush_on_exit) 2933 FlushInferiorOutput (); 2934 return SendWResponse(m_debugged_process_sp.get()); 2935 2936 default: 2937 if (log) 2938 { 2939 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 ", current state reporting not handled: %s", 2940 __FUNCTION__, 2941 m_debugged_process_sp->GetID (), 2942 StateAsCString (process_state)); 2943 } 2944 break; 2945 } 2946 2947 return SendErrorResponse (0); 2948 } 2949 2950 GDBRemoteCommunication::PacketResult 2951 GDBRemoteCommunicationServer::Handle_vFile_Stat (StringExtractorGDBRemote &packet) 2952 { 2953 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_Stat() unimplemented"); 2954 } 2955 2956 GDBRemoteCommunication::PacketResult 2957 GDBRemoteCommunicationServer::Handle_vFile_MD5 (StringExtractorGDBRemote &packet) 2958 { 2959 packet.SetFilePos(::strlen("vFile:MD5:")); 2960 std::string path; 2961 packet.GetHexByteString(path); 2962 if (!path.empty()) 2963 { 2964 uint64_t a,b; 2965 StreamGDBRemote response; 2966 if (FileSystem::CalculateMD5(FileSpec(path.c_str(), false), a, b) == false) 2967 { 2968 response.PutCString("F,"); 2969 response.PutCString("x"); 2970 } 2971 else 2972 { 2973 response.PutCString("F,"); 2974 response.PutHex64(a); 2975 response.PutHex64(b); 2976 } 2977 return SendPacketNoLock(response.GetData(), response.GetSize()); 2978 } 2979 return SendErrorResponse(25); 2980 } 2981 2982 GDBRemoteCommunication::PacketResult 2983 GDBRemoteCommunicationServer::Handle_qRegisterInfo (StringExtractorGDBRemote &packet) 2984 { 2985 // Ensure we're llgs. 2986 if (!IsGdbServer()) 2987 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qRegisterInfo() unimplemented"); 2988 2989 // Fail if we don't have a current process. 2990 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 2991 return SendErrorResponse (68); 2992 2993 // Ensure we have a thread. 2994 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadAtIndex (0)); 2995 if (!thread_sp) 2996 return SendErrorResponse (69); 2997 2998 // Get the register context for the first thread. 2999 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3000 if (!reg_context_sp) 3001 return SendErrorResponse (69); 3002 3003 // Parse out the register number from the request. 3004 packet.SetFilePos (strlen("qRegisterInfo")); 3005 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3006 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3007 return SendErrorResponse (69); 3008 3009 // Return the end of registers response if we've iterated one past the end of the register set. 3010 if (reg_index >= reg_context_sp->GetUserRegisterCount ()) 3011 return SendErrorResponse (69); 3012 3013 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3014 if (!reg_info) 3015 return SendErrorResponse (69); 3016 3017 // Build the reginfos response. 3018 StreamGDBRemote response; 3019 3020 response.PutCString ("name:"); 3021 response.PutCString (reg_info->name); 3022 response.PutChar (';'); 3023 3024 if (reg_info->alt_name && reg_info->alt_name[0]) 3025 { 3026 response.PutCString ("alt-name:"); 3027 response.PutCString (reg_info->alt_name); 3028 response.PutChar (';'); 3029 } 3030 3031 response.Printf ("bitsize:%" PRIu32 ";offset:%" PRIu32 ";", reg_info->byte_size * 8, reg_info->byte_offset); 3032 3033 switch (reg_info->encoding) 3034 { 3035 case eEncodingUint: response.PutCString ("encoding:uint;"); break; 3036 case eEncodingSint: response.PutCString ("encoding:sint;"); break; 3037 case eEncodingIEEE754: response.PutCString ("encoding:ieee754;"); break; 3038 case eEncodingVector: response.PutCString ("encoding:vector;"); break; 3039 default: break; 3040 } 3041 3042 switch (reg_info->format) 3043 { 3044 case eFormatBinary: response.PutCString ("format:binary;"); break; 3045 case eFormatDecimal: response.PutCString ("format:decimal;"); break; 3046 case eFormatHex: response.PutCString ("format:hex;"); break; 3047 case eFormatFloat: response.PutCString ("format:float;"); break; 3048 case eFormatVectorOfSInt8: response.PutCString ("format:vector-sint8;"); break; 3049 case eFormatVectorOfUInt8: response.PutCString ("format:vector-uint8;"); break; 3050 case eFormatVectorOfSInt16: response.PutCString ("format:vector-sint16;"); break; 3051 case eFormatVectorOfUInt16: response.PutCString ("format:vector-uint16;"); break; 3052 case eFormatVectorOfSInt32: response.PutCString ("format:vector-sint32;"); break; 3053 case eFormatVectorOfUInt32: response.PutCString ("format:vector-uint32;"); break; 3054 case eFormatVectorOfFloat32: response.PutCString ("format:vector-float32;"); break; 3055 case eFormatVectorOfUInt128: response.PutCString ("format:vector-uint128;"); break; 3056 default: break; 3057 }; 3058 3059 const char *const register_set_name = reg_context_sp->GetRegisterSetNameForRegisterAtIndex(reg_index); 3060 if (register_set_name) 3061 { 3062 response.PutCString ("set:"); 3063 response.PutCString (register_set_name); 3064 response.PutChar (';'); 3065 } 3066 3067 if (reg_info->kinds[RegisterKind::eRegisterKindGCC] != LLDB_INVALID_REGNUM) 3068 response.Printf ("gcc:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindGCC]); 3069 3070 if (reg_info->kinds[RegisterKind::eRegisterKindDWARF] != LLDB_INVALID_REGNUM) 3071 response.Printf ("dwarf:%" PRIu32 ";", reg_info->kinds[RegisterKind::eRegisterKindDWARF]); 3072 3073 switch (reg_info->kinds[RegisterKind::eRegisterKindGeneric]) 3074 { 3075 case LLDB_REGNUM_GENERIC_PC: response.PutCString("generic:pc;"); break; 3076 case LLDB_REGNUM_GENERIC_SP: response.PutCString("generic:sp;"); break; 3077 case LLDB_REGNUM_GENERIC_FP: response.PutCString("generic:fp;"); break; 3078 case LLDB_REGNUM_GENERIC_RA: response.PutCString("generic:ra;"); break; 3079 case LLDB_REGNUM_GENERIC_FLAGS: response.PutCString("generic:flags;"); break; 3080 case LLDB_REGNUM_GENERIC_ARG1: response.PutCString("generic:arg1;"); break; 3081 case LLDB_REGNUM_GENERIC_ARG2: response.PutCString("generic:arg2;"); break; 3082 case LLDB_REGNUM_GENERIC_ARG3: response.PutCString("generic:arg3;"); break; 3083 case LLDB_REGNUM_GENERIC_ARG4: response.PutCString("generic:arg4;"); break; 3084 case LLDB_REGNUM_GENERIC_ARG5: response.PutCString("generic:arg5;"); break; 3085 case LLDB_REGNUM_GENERIC_ARG6: response.PutCString("generic:arg6;"); break; 3086 case LLDB_REGNUM_GENERIC_ARG7: response.PutCString("generic:arg7;"); break; 3087 case LLDB_REGNUM_GENERIC_ARG8: response.PutCString("generic:arg8;"); break; 3088 default: break; 3089 } 3090 3091 if (reg_info->value_regs && reg_info->value_regs[0] != LLDB_INVALID_REGNUM) 3092 { 3093 response.PutCString ("container-regs:"); 3094 int i = 0; 3095 for (const uint32_t *reg_num = reg_info->value_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) 3096 { 3097 if (i > 0) 3098 response.PutChar (','); 3099 response.Printf ("%" PRIx32, *reg_num); 3100 } 3101 response.PutChar (';'); 3102 } 3103 3104 if (reg_info->invalidate_regs && reg_info->invalidate_regs[0]) 3105 { 3106 response.PutCString ("invalidate-regs:"); 3107 int i = 0; 3108 for (const uint32_t *reg_num = reg_info->invalidate_regs; *reg_num != LLDB_INVALID_REGNUM; ++reg_num, ++i) 3109 { 3110 if (i > 0) 3111 response.PutChar (','); 3112 response.Printf ("%" PRIx32, *reg_num); 3113 } 3114 response.PutChar (';'); 3115 } 3116 3117 return SendPacketNoLock(response.GetData(), response.GetSize()); 3118 } 3119 3120 GDBRemoteCommunication::PacketResult 3121 GDBRemoteCommunicationServer::Handle_qfThreadInfo (StringExtractorGDBRemote &packet) 3122 { 3123 // Ensure we're llgs. 3124 if (!IsGdbServer()) 3125 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_qfThreadInfo() unimplemented"); 3126 3127 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3128 3129 // Fail if we don't have a current process. 3130 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3131 { 3132 if (log) 3133 log->Printf ("GDBRemoteCommunicationServer::%s() no process (%s), returning OK", __FUNCTION__, m_debugged_process_sp ? "invalid process id" : "null m_debugged_process_sp"); 3134 return SendOKResponse (); 3135 } 3136 3137 StreamGDBRemote response; 3138 response.PutChar ('m'); 3139 3140 if (log) 3141 log->Printf ("GDBRemoteCommunicationServer::%s() starting thread iteration", __FUNCTION__); 3142 3143 NativeThreadProtocolSP thread_sp; 3144 uint32_t thread_index; 3145 for (thread_index = 0, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index); 3146 thread_sp; 3147 ++thread_index, thread_sp = m_debugged_process_sp->GetThreadAtIndex (thread_index)) 3148 { 3149 if (log) 3150 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); 3151 if (thread_index > 0) 3152 response.PutChar(','); 3153 response.Printf ("%" PRIx64, thread_sp->GetID ()); 3154 } 3155 3156 if (log) 3157 log->Printf ("GDBRemoteCommunicationServer::%s() finished thread iteration", __FUNCTION__); 3158 3159 return SendPacketNoLock(response.GetData(), response.GetSize()); 3160 } 3161 3162 GDBRemoteCommunication::PacketResult 3163 GDBRemoteCommunicationServer::Handle_qsThreadInfo (StringExtractorGDBRemote &packet) 3164 { 3165 // Ensure we're llgs. 3166 if (!IsGdbServer()) 3167 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_qsThreadInfo() unimplemented"); 3168 3169 // FIXME for now we return the full thread list in the initial packet and always do nothing here. 3170 return SendPacketNoLock ("l", 1); 3171 } 3172 3173 GDBRemoteCommunication::PacketResult 3174 GDBRemoteCommunicationServer::Handle_p (StringExtractorGDBRemote &packet) 3175 { 3176 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3177 3178 // Ensure we're llgs. 3179 if (!IsGdbServer()) 3180 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_p() unimplemented"); 3181 3182 // Parse out the register number from the request. 3183 packet.SetFilePos (strlen("p")); 3184 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3185 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3186 { 3187 if (log) 3188 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 3189 return SendErrorResponse (0x15); 3190 } 3191 3192 // Get the thread to use. 3193 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 3194 if (!thread_sp) 3195 { 3196 if (log) 3197 log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available", __FUNCTION__); 3198 return SendErrorResponse (0x15); 3199 } 3200 3201 // Get the thread's register context. 3202 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3203 if (!reg_context_sp) 3204 { 3205 if (log) 3206 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 ()); 3207 return SendErrorResponse (0x15); 3208 } 3209 3210 // Return the end of registers response if we've iterated one past the end of the register set. 3211 if (reg_index >= reg_context_sp->GetUserRegisterCount ()) 3212 { 3213 if (log) 3214 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetUserRegisterCount ()); 3215 return SendErrorResponse (0x15); 3216 } 3217 3218 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex(reg_index); 3219 if (!reg_info) 3220 { 3221 if (log) 3222 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); 3223 return SendErrorResponse (0x15); 3224 } 3225 3226 // Build the reginfos response. 3227 StreamGDBRemote response; 3228 3229 // Retrieve the value 3230 RegisterValue reg_value; 3231 Error error = reg_context_sp->ReadRegister (reg_info, reg_value); 3232 if (error.Fail ()) 3233 { 3234 if (log) 3235 log->Printf ("GDBRemoteCommunicationServer::%s failed, read of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); 3236 return SendErrorResponse (0x15); 3237 } 3238 3239 const uint8_t *const data = reinterpret_cast<const uint8_t*> (reg_value.GetBytes ()); 3240 if (!data) 3241 { 3242 if (log) 3243 log->Printf ("GDBRemoteCommunicationServer::%s failed to get data bytes from requested register %" PRIu32, __FUNCTION__, reg_index); 3244 return SendErrorResponse (0x15); 3245 } 3246 3247 // FIXME flip as needed to get data in big/little endian format for this host. 3248 for (uint32_t i = 0; i < reg_value.GetByteSize (); ++i) 3249 response.PutHex8 (data[i]); 3250 3251 return SendPacketNoLock (response.GetData (), response.GetSize ()); 3252 } 3253 3254 GDBRemoteCommunication::PacketResult 3255 GDBRemoteCommunicationServer::Handle_P (StringExtractorGDBRemote &packet) 3256 { 3257 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3258 3259 // Ensure we're llgs. 3260 if (!IsGdbServer()) 3261 return SendUnimplementedResponse ("GDBRemoteCommunicationServer::Handle_P() unimplemented"); 3262 3263 // Ensure there is more content. 3264 if (packet.GetBytesLeft () < 1) 3265 return SendIllFormedResponse (packet, "Empty P packet"); 3266 3267 // Parse out the register number from the request. 3268 packet.SetFilePos (strlen("P")); 3269 const uint32_t reg_index = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3270 if (reg_index == std::numeric_limits<uint32_t>::max ()) 3271 { 3272 if (log) 3273 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse register number from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 3274 return SendErrorResponse (0x29); 3275 } 3276 3277 // Note debugserver would send an E30 here. 3278 if ((packet.GetBytesLeft () < 1) || (packet.GetChar () != '=')) 3279 return SendIllFormedResponse (packet, "P packet missing '=' char after register number"); 3280 3281 // Get process architecture. 3282 ArchSpec process_arch; 3283 if (!m_debugged_process_sp || !m_debugged_process_sp->GetArchitecture (process_arch)) 3284 { 3285 if (log) 3286 log->Printf ("GDBRemoteCommunicationServer::%s failed to retrieve inferior architecture", __FUNCTION__); 3287 return SendErrorResponse (0x49); 3288 } 3289 3290 // Parse out the value. 3291 uint8_t reg_bytes[32]; // big enough to support up to 256 bit ymmN register 3292 size_t reg_size = packet.GetHexBytesAvail (reg_bytes, sizeof(reg_bytes)); 3293 3294 // Get the thread to use. 3295 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 3296 if (!thread_sp) 3297 { 3298 if (log) 3299 log->Printf ("GDBRemoteCommunicationServer::%s failed, no thread available (thread index 0)", __FUNCTION__); 3300 return SendErrorResponse (0x28); 3301 } 3302 3303 // Get the thread's register context. 3304 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 3305 if (!reg_context_sp) 3306 { 3307 if (log) 3308 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 ()); 3309 return SendErrorResponse (0x15); 3310 } 3311 3312 const RegisterInfo *reg_info = reg_context_sp->GetRegisterInfoAtIndex (reg_index); 3313 if (!reg_info) 3314 { 3315 if (log) 3316 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " returned NULL", __FUNCTION__, reg_index); 3317 return SendErrorResponse (0x48); 3318 } 3319 3320 // Return the end of registers response if we've iterated one past the end of the register set. 3321 if (reg_index >= reg_context_sp->GetUserRegisterCount ()) 3322 { 3323 if (log) 3324 log->Printf ("GDBRemoteCommunicationServer::%s failed, requested register %" PRIu32 " beyond register count %" PRIu32, __FUNCTION__, reg_index, reg_context_sp->GetUserRegisterCount ()); 3325 return SendErrorResponse (0x47); 3326 } 3327 3328 if (reg_size != reg_info->byte_size) 3329 { 3330 return SendIllFormedResponse (packet, "P packet register size is incorrect"); 3331 } 3332 3333 // Build the reginfos response. 3334 StreamGDBRemote response; 3335 3336 RegisterValue reg_value (reg_bytes, reg_size, process_arch.GetByteOrder ()); 3337 Error error = reg_context_sp->WriteRegister (reg_info, reg_value); 3338 if (error.Fail ()) 3339 { 3340 if (log) 3341 log->Printf ("GDBRemoteCommunicationServer::%s failed, write of requested register %" PRIu32 " (%s) failed: %s", __FUNCTION__, reg_index, reg_info->name, error.AsCString ()); 3342 return SendErrorResponse (0x32); 3343 } 3344 3345 return SendOKResponse(); 3346 } 3347 3348 GDBRemoteCommunicationServer::PacketResult 3349 GDBRemoteCommunicationServer::Handle_H (StringExtractorGDBRemote &packet) 3350 { 3351 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 3352 3353 // Ensure we're llgs. 3354 if (!IsGdbServer()) 3355 return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_H() unimplemented"); 3356 3357 // Fail if we don't have a current process. 3358 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3359 { 3360 if (log) 3361 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3362 return SendErrorResponse (0x15); 3363 } 3364 3365 // Parse out which variant of $H is requested. 3366 packet.SetFilePos (strlen("H")); 3367 if (packet.GetBytesLeft () < 1) 3368 { 3369 if (log) 3370 log->Printf ("GDBRemoteCommunicationServer::%s failed, H command missing {g,c} variant", __FUNCTION__); 3371 return SendIllFormedResponse (packet, "H command missing {g,c} variant"); 3372 } 3373 3374 const char h_variant = packet.GetChar (); 3375 switch (h_variant) 3376 { 3377 case 'g': 3378 break; 3379 3380 case 'c': 3381 break; 3382 3383 default: 3384 if (log) 3385 log->Printf ("GDBRemoteCommunicationServer::%s failed, invalid $H variant %c", __FUNCTION__, h_variant); 3386 return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); 3387 } 3388 3389 // Parse out the thread number. 3390 // FIXME return a parse success/fail value. All values are valid here. 3391 const lldb::tid_t tid = packet.GetHexMaxU64 (false, std::numeric_limits<lldb::tid_t>::max ()); 3392 3393 // Ensure we have the given thread when not specifying -1 (all threads) or 0 (any thread). 3394 if (tid != LLDB_INVALID_THREAD_ID && tid != 0) 3395 { 3396 NativeThreadProtocolSP thread_sp (m_debugged_process_sp->GetThreadByID (tid)); 3397 if (!thread_sp) 3398 { 3399 if (log) 3400 log->Printf ("GDBRemoteCommunicationServer::%s failed, tid %" PRIu64 " not found", __FUNCTION__, tid); 3401 return SendErrorResponse (0x15); 3402 } 3403 } 3404 3405 // Now switch the given thread type. 3406 switch (h_variant) 3407 { 3408 case 'g': 3409 SetCurrentThreadID (tid); 3410 break; 3411 3412 case 'c': 3413 SetContinueThreadID (tid); 3414 break; 3415 3416 default: 3417 assert (false && "unsupported $H variant - shouldn't get here"); 3418 return SendIllFormedResponse (packet, "H variant unsupported, should be c or g"); 3419 } 3420 3421 return SendOKResponse(); 3422 } 3423 3424 GDBRemoteCommunicationServer::PacketResult 3425 GDBRemoteCommunicationServer::Handle_interrupt (StringExtractorGDBRemote &packet) 3426 { 3427 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 3428 3429 // Ensure we're llgs. 3430 if (!IsGdbServer()) 3431 { 3432 // Only supported on llgs 3433 return SendUnimplementedResponse (""); 3434 } 3435 3436 // Fail if we don't have a current process. 3437 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3438 { 3439 if (log) 3440 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3441 return SendErrorResponse (0x15); 3442 } 3443 3444 // Interrupt the process. 3445 Error error = m_debugged_process_sp->Interrupt (); 3446 if (error.Fail ()) 3447 { 3448 if (log) 3449 { 3450 log->Printf ("GDBRemoteCommunicationServer::%s failed for process %" PRIu64 ": %s", 3451 __FUNCTION__, 3452 m_debugged_process_sp->GetID (), 3453 error.AsCString ()); 3454 } 3455 return SendErrorResponse (GDBRemoteServerError::eErrorResume); 3456 } 3457 3458 if (log) 3459 log->Printf ("GDBRemoteCommunicationServer::%s stopped process %" PRIu64, __FUNCTION__, m_debugged_process_sp->GetID ()); 3460 3461 // No response required from stop all. 3462 return PacketResult::Success; 3463 } 3464 3465 GDBRemoteCommunicationServer::PacketResult 3466 GDBRemoteCommunicationServer::Handle_m (StringExtractorGDBRemote &packet) 3467 { 3468 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3469 3470 // Ensure we're llgs. 3471 if (!IsGdbServer()) 3472 { 3473 // Only supported on llgs 3474 return SendUnimplementedResponse (""); 3475 } 3476 3477 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3478 { 3479 if (log) 3480 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3481 return SendErrorResponse (0x15); 3482 } 3483 3484 // Parse out the memory address. 3485 packet.SetFilePos (strlen("m")); 3486 if (packet.GetBytesLeft() < 1) 3487 return SendIllFormedResponse(packet, "Too short m packet"); 3488 3489 // Read the address. Punting on validation. 3490 // FIXME replace with Hex U64 read with no default value that fails on failed read. 3491 const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); 3492 3493 // Validate comma. 3494 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) 3495 return SendIllFormedResponse(packet, "Comma sep missing in m packet"); 3496 3497 // Get # bytes to read. 3498 if (packet.GetBytesLeft() < 1) 3499 return SendIllFormedResponse(packet, "Length missing in m packet"); 3500 3501 const uint64_t byte_count = packet.GetHexMaxU64(false, 0); 3502 if (byte_count == 0) 3503 { 3504 if (log) 3505 log->Printf ("GDBRemoteCommunicationServer::%s nothing to read: zero-length packet", __FUNCTION__); 3506 return PacketResult::Success; 3507 } 3508 3509 // Allocate the response buffer. 3510 std::string buf(byte_count, '\0'); 3511 if (buf.empty()) 3512 return SendErrorResponse (0x78); 3513 3514 3515 // Retrieve the process memory. 3516 lldb::addr_t bytes_read = 0; 3517 lldb_private::Error error = m_debugged_process_sp->ReadMemory (read_addr, &buf[0], byte_count, bytes_read); 3518 if (error.Fail ()) 3519 { 3520 if (log) 3521 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to read. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), read_addr, error.AsCString ()); 3522 return SendErrorResponse (0x08); 3523 } 3524 3525 if (bytes_read == 0) 3526 { 3527 if (log) 3528 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); 3529 return SendErrorResponse (0x08); 3530 } 3531 3532 StreamGDBRemote response; 3533 for (lldb::addr_t i = 0; i < bytes_read; ++i) 3534 response.PutHex8(buf[i]); 3535 3536 return SendPacketNoLock(response.GetData(), response.GetSize()); 3537 } 3538 3539 GDBRemoteCommunication::PacketResult 3540 GDBRemoteCommunicationServer::Handle_QSetDetachOnError (StringExtractorGDBRemote &packet) 3541 { 3542 packet.SetFilePos(::strlen ("QSetDetachOnError:")); 3543 if (packet.GetU32(0)) 3544 m_process_launch_info.GetFlags().Set (eLaunchFlagDetachOnError); 3545 else 3546 m_process_launch_info.GetFlags().Clear (eLaunchFlagDetachOnError); 3547 return SendOKResponse (); 3548 } 3549 3550 GDBRemoteCommunicationServer::PacketResult 3551 GDBRemoteCommunicationServer::Handle_M (StringExtractorGDBRemote &packet) 3552 { 3553 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3554 3555 // Ensure we're llgs. 3556 if (!IsGdbServer()) 3557 { 3558 // Only supported on llgs 3559 return SendUnimplementedResponse (""); 3560 } 3561 3562 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3563 { 3564 if (log) 3565 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3566 return SendErrorResponse (0x15); 3567 } 3568 3569 // Parse out the memory address. 3570 packet.SetFilePos (strlen("M")); 3571 if (packet.GetBytesLeft() < 1) 3572 return SendIllFormedResponse(packet, "Too short M packet"); 3573 3574 // Read the address. Punting on validation. 3575 // FIXME replace with Hex U64 read with no default value that fails on failed read. 3576 const lldb::addr_t write_addr = packet.GetHexMaxU64(false, 0); 3577 3578 // Validate comma. 3579 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ',')) 3580 return SendIllFormedResponse(packet, "Comma sep missing in M packet"); 3581 3582 // Get # bytes to read. 3583 if (packet.GetBytesLeft() < 1) 3584 return SendIllFormedResponse(packet, "Length missing in M packet"); 3585 3586 const uint64_t byte_count = packet.GetHexMaxU64(false, 0); 3587 if (byte_count == 0) 3588 { 3589 if (log) 3590 log->Printf ("GDBRemoteCommunicationServer::%s nothing to write: zero-length packet", __FUNCTION__); 3591 return PacketResult::Success; 3592 } 3593 3594 // Validate colon. 3595 if ((packet.GetBytesLeft() < 1) || (packet.GetChar() != ':')) 3596 return SendIllFormedResponse(packet, "Comma sep missing in M packet after byte length"); 3597 3598 // Allocate the conversion buffer. 3599 std::vector<uint8_t> buf(byte_count, 0); 3600 if (buf.empty()) 3601 return SendErrorResponse (0x78); 3602 3603 // Convert the hex memory write contents to bytes. 3604 StreamGDBRemote response; 3605 const uint64_t convert_count = static_cast<uint64_t> (packet.GetHexBytes (&buf[0], byte_count, 0)); 3606 if (convert_count != byte_count) 3607 { 3608 if (log) 3609 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); 3610 return SendIllFormedResponse (packet, "M content byte length specified did not match hex-encoded content length"); 3611 } 3612 3613 // Write the process memory. 3614 lldb::addr_t bytes_written = 0; 3615 lldb_private::Error error = m_debugged_process_sp->WriteMemory (write_addr, &buf[0], byte_count, bytes_written); 3616 if (error.Fail ()) 3617 { 3618 if (log) 3619 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " mem 0x%" PRIx64 ": failed to write. Error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), write_addr, error.AsCString ()); 3620 return SendErrorResponse (0x09); 3621 } 3622 3623 if (bytes_written == 0) 3624 { 3625 if (log) 3626 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); 3627 return SendErrorResponse (0x09); 3628 } 3629 3630 return SendOKResponse (); 3631 } 3632 3633 GDBRemoteCommunicationServer::PacketResult 3634 GDBRemoteCommunicationServer::Handle_qMemoryRegionInfoSupported (StringExtractorGDBRemote &packet) 3635 { 3636 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3637 3638 // We don't support if we're not llgs. 3639 if (!IsGdbServer()) 3640 return SendUnimplementedResponse (""); 3641 3642 // Currently only the NativeProcessProtocol knows if it can handle a qMemoryRegionInfoSupported 3643 // request, but we're not guaranteed to be attached to a process. For now we'll assume the 3644 // client only asks this when a process is being debugged. 3645 3646 // Ensure we have a process running; otherwise, we can't figure this out 3647 // since we won't have a NativeProcessProtocol. 3648 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3649 { 3650 if (log) 3651 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3652 return SendErrorResponse (0x15); 3653 } 3654 3655 // Test if we can get any region back when asking for the region around NULL. 3656 MemoryRegionInfo region_info; 3657 const Error error = m_debugged_process_sp->GetMemoryRegionInfo (0, region_info); 3658 if (error.Fail ()) 3659 { 3660 // We don't support memory region info collection for this NativeProcessProtocol. 3661 return SendUnimplementedResponse (""); 3662 } 3663 3664 return SendOKResponse(); 3665 } 3666 3667 GDBRemoteCommunicationServer::PacketResult 3668 GDBRemoteCommunicationServer::Handle_qMemoryRegionInfo (StringExtractorGDBRemote &packet) 3669 { 3670 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3671 3672 // We don't support if we're not llgs. 3673 if (!IsGdbServer()) 3674 return SendUnimplementedResponse (""); 3675 3676 // Ensure we have a process. 3677 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3678 { 3679 if (log) 3680 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3681 return SendErrorResponse (0x15); 3682 } 3683 3684 // Parse out the memory address. 3685 packet.SetFilePos (strlen("qMemoryRegionInfo:")); 3686 if (packet.GetBytesLeft() < 1) 3687 return SendIllFormedResponse(packet, "Too short qMemoryRegionInfo: packet"); 3688 3689 // Read the address. Punting on validation. 3690 const lldb::addr_t read_addr = packet.GetHexMaxU64(false, 0); 3691 3692 StreamGDBRemote response; 3693 3694 // Get the memory region info for the target address. 3695 MemoryRegionInfo region_info; 3696 const Error error = m_debugged_process_sp->GetMemoryRegionInfo (read_addr, region_info); 3697 if (error.Fail ()) 3698 { 3699 // Return the error message. 3700 3701 response.PutCString ("error:"); 3702 response.PutCStringAsRawHex8 (error.AsCString ()); 3703 response.PutChar (';'); 3704 } 3705 else 3706 { 3707 // Range start and size. 3708 response.Printf ("start:%" PRIx64 ";size:%" PRIx64 ";", region_info.GetRange ().GetRangeBase (), region_info.GetRange ().GetByteSize ()); 3709 3710 // Permissions. 3711 if (region_info.GetReadable () || 3712 region_info.GetWritable () || 3713 region_info.GetExecutable ()) 3714 { 3715 // Write permissions info. 3716 response.PutCString ("permissions:"); 3717 3718 if (region_info.GetReadable ()) 3719 response.PutChar ('r'); 3720 if (region_info.GetWritable ()) 3721 response.PutChar('w'); 3722 if (region_info.GetExecutable()) 3723 response.PutChar ('x'); 3724 3725 response.PutChar (';'); 3726 } 3727 } 3728 3729 return SendPacketNoLock(response.GetData(), response.GetSize()); 3730 } 3731 3732 GDBRemoteCommunicationServer::PacketResult 3733 GDBRemoteCommunicationServer::Handle_Z (StringExtractorGDBRemote &packet) 3734 { 3735 // We don't support if we're not llgs. 3736 if (!IsGdbServer()) 3737 return SendUnimplementedResponse (""); 3738 3739 // Ensure we have a process. 3740 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3741 { 3742 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3743 if (log) 3744 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3745 return SendErrorResponse (0x15); 3746 } 3747 3748 // Parse out software or hardware breakpoint or watchpoint requested. 3749 packet.SetFilePos (strlen("Z")); 3750 if (packet.GetBytesLeft() < 1) 3751 return SendIllFormedResponse(packet, "Too short Z packet, missing software/hardware specifier"); 3752 3753 bool want_breakpoint = true; 3754 bool want_hardware = false; 3755 3756 const GDBStoppointType stoppoint_type = 3757 GDBStoppointType(packet.GetS32 (eStoppointInvalid)); 3758 switch (stoppoint_type) 3759 { 3760 case eBreakpointSoftware: 3761 want_hardware = false; want_breakpoint = true; break; 3762 case eBreakpointHardware: 3763 want_hardware = true; want_breakpoint = true; break; 3764 case eWatchpointWrite: 3765 want_hardware = true; want_breakpoint = false; break; 3766 case eWatchpointRead: 3767 want_hardware = true; want_breakpoint = false; break; 3768 case eWatchpointReadWrite: 3769 want_hardware = true; want_breakpoint = false; break; 3770 case eStoppointInvalid: 3771 return SendIllFormedResponse(packet, "Z packet had invalid software/hardware specifier"); 3772 3773 } 3774 3775 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3776 return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after stoppoint type"); 3777 3778 // Parse out the stoppoint address. 3779 if (packet.GetBytesLeft() < 1) 3780 return SendIllFormedResponse(packet, "Too short Z packet, missing address"); 3781 const lldb::addr_t addr = packet.GetHexMaxU64(false, 0); 3782 3783 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3784 return SendIllFormedResponse(packet, "Malformed Z packet, expecting comma after address"); 3785 3786 // Parse out the stoppoint size (i.e. size hint for opcode size). 3787 const uint32_t size = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3788 if (size == std::numeric_limits<uint32_t>::max ()) 3789 return SendIllFormedResponse(packet, "Malformed Z packet, failed to parse size argument"); 3790 3791 if (want_breakpoint) 3792 { 3793 // Try to set the breakpoint. 3794 const Error error = m_debugged_process_sp->SetBreakpoint (addr, size, want_hardware); 3795 if (error.Success ()) 3796 return SendOKResponse (); 3797 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); 3798 if (log) 3799 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 3800 " failed to set breakpoint: %s", 3801 __FUNCTION__, 3802 m_debugged_process_sp->GetID (), 3803 error.AsCString ()); 3804 return SendErrorResponse (0x09); 3805 } 3806 else 3807 { 3808 uint32_t watch_flags = 3809 stoppoint_type == eWatchpointWrite 3810 ? watch_flags = 0x1 // Write 3811 : watch_flags = 0x3; // ReadWrite 3812 3813 // Try to set the watchpoint. 3814 const Error error = m_debugged_process_sp->SetWatchpoint ( 3815 addr, size, watch_flags, want_hardware); 3816 if (error.Success ()) 3817 return SendOKResponse (); 3818 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); 3819 if (log) 3820 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 3821 " failed to set watchpoint: %s", 3822 __FUNCTION__, 3823 m_debugged_process_sp->GetID (), 3824 error.AsCString ()); 3825 return SendErrorResponse (0x09); 3826 } 3827 } 3828 3829 GDBRemoteCommunicationServer::PacketResult 3830 GDBRemoteCommunicationServer::Handle_z (StringExtractorGDBRemote &packet) 3831 { 3832 // We don't support if we're not llgs. 3833 if (!IsGdbServer()) 3834 return SendUnimplementedResponse (""); 3835 3836 // Ensure we have a process. 3837 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3838 { 3839 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 3840 if (log) 3841 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3842 return SendErrorResponse (0x15); 3843 } 3844 3845 // Parse out software or hardware breakpoint or watchpoint requested. 3846 packet.SetFilePos (strlen("z")); 3847 if (packet.GetBytesLeft() < 1) 3848 return SendIllFormedResponse(packet, "Too short z packet, missing software/hardware specifier"); 3849 3850 bool want_breakpoint = true; 3851 3852 const GDBStoppointType stoppoint_type = 3853 GDBStoppointType(packet.GetS32 (eStoppointInvalid)); 3854 switch (stoppoint_type) 3855 { 3856 case eBreakpointHardware: want_breakpoint = true; break; 3857 case eBreakpointSoftware: want_breakpoint = true; break; 3858 case eWatchpointWrite: want_breakpoint = false; break; 3859 case eWatchpointRead: want_breakpoint = false; break; 3860 case eWatchpointReadWrite: want_breakpoint = false; break; 3861 default: 3862 return SendIllFormedResponse(packet, "z packet had invalid software/hardware specifier"); 3863 3864 } 3865 3866 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3867 return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after stoppoint type"); 3868 3869 // Parse out the stoppoint address. 3870 if (packet.GetBytesLeft() < 1) 3871 return SendIllFormedResponse(packet, "Too short z packet, missing address"); 3872 const lldb::addr_t addr = packet.GetHexMaxU64(false, 0); 3873 3874 if ((packet.GetBytesLeft() < 1) || packet.GetChar () != ',') 3875 return SendIllFormedResponse(packet, "Malformed z packet, expecting comma after address"); 3876 3877 /* 3878 // Parse out the stoppoint size (i.e. size hint for opcode size). 3879 const uint32_t size = packet.GetHexMaxU32 (false, std::numeric_limits<uint32_t>::max ()); 3880 if (size == std::numeric_limits<uint32_t>::max ()) 3881 return SendIllFormedResponse(packet, "Malformed z packet, failed to parse size argument"); 3882 */ 3883 3884 if (want_breakpoint) 3885 { 3886 // Try to clear the breakpoint. 3887 const Error error = m_debugged_process_sp->RemoveBreakpoint (addr); 3888 if (error.Success ()) 3889 return SendOKResponse (); 3890 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_BREAKPOINTS)); 3891 if (log) 3892 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 3893 " failed to remove breakpoint: %s", 3894 __FUNCTION__, 3895 m_debugged_process_sp->GetID (), 3896 error.AsCString ()); 3897 return SendErrorResponse (0x09); 3898 } 3899 else 3900 { 3901 // Try to clear the watchpoint. 3902 const Error error = m_debugged_process_sp->RemoveWatchpoint (addr); 3903 if (error.Success ()) 3904 return SendOKResponse (); 3905 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_WATCHPOINTS)); 3906 if (log) 3907 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 3908 " failed to remove watchpoint: %s", 3909 __FUNCTION__, 3910 m_debugged_process_sp->GetID (), 3911 error.AsCString ()); 3912 return SendErrorResponse (0x09); 3913 } 3914 } 3915 3916 GDBRemoteCommunicationServer::PacketResult 3917 GDBRemoteCommunicationServer::Handle_s (StringExtractorGDBRemote &packet) 3918 { 3919 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|LIBLLDB_LOG_THREAD)); 3920 3921 // We don't support if we're not llgs. 3922 if (!IsGdbServer()) 3923 return SendUnimplementedResponse (""); 3924 3925 // Ensure we have a process. 3926 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 3927 { 3928 if (log) 3929 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 3930 return SendErrorResponse (0x32); 3931 } 3932 3933 // We first try to use a continue thread id. If any one or any all set, use the current thread. 3934 // Bail out if we don't have a thread id. 3935 lldb::tid_t tid = GetContinueThreadID (); 3936 if (tid == 0 || tid == LLDB_INVALID_THREAD_ID) 3937 tid = GetCurrentThreadID (); 3938 if (tid == LLDB_INVALID_THREAD_ID) 3939 return SendErrorResponse (0x33); 3940 3941 // Double check that we have such a thread. 3942 // TODO investigate: on MacOSX we might need to do an UpdateThreads () here. 3943 NativeThreadProtocolSP thread_sp = m_debugged_process_sp->GetThreadByID (tid); 3944 if (!thread_sp || thread_sp->GetID () != tid) 3945 return SendErrorResponse (0x33); 3946 3947 // Create the step action for the given thread. 3948 lldb_private::ResumeAction action = { tid, eStateStepping, 0 }; 3949 3950 // Setup the actions list. 3951 lldb_private::ResumeActionList actions; 3952 actions.Append (action); 3953 3954 // All other threads stop while we're single stepping a thread. 3955 actions.SetDefaultThreadActionIfNeeded(eStateStopped, 0); 3956 Error error = m_debugged_process_sp->Resume (actions); 3957 if (error.Fail ()) 3958 { 3959 if (log) 3960 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " Resume() failed with error: %s", __FUNCTION__, m_debugged_process_sp->GetID (), tid, error.AsCString ()); 3961 return SendErrorResponse(0x49); 3962 } 3963 3964 // No response here - the stop or exit will come from the resulting action. 3965 return PacketResult::Success; 3966 } 3967 3968 GDBRemoteCommunicationServer::PacketResult 3969 GDBRemoteCommunicationServer::Handle_qSupported (StringExtractorGDBRemote &packet) 3970 { 3971 StreamGDBRemote response; 3972 3973 // Features common to lldb-platform and llgs. 3974 uint32_t max_packet_size = 128 * 1024; // 128KBytes is a reasonable max packet size--debugger can always use less 3975 response.Printf ("PacketSize=%x", max_packet_size); 3976 3977 response.PutCString (";QStartNoAckMode+"); 3978 response.PutCString (";QThreadSuffixSupported+"); 3979 response.PutCString (";QListThreadsInStopReply+"); 3980 #if defined(__linux__) 3981 response.PutCString (";qXfer:auxv:read+"); 3982 #endif 3983 3984 return SendPacketNoLock(response.GetData(), response.GetSize()); 3985 } 3986 3987 GDBRemoteCommunicationServer::PacketResult 3988 GDBRemoteCommunicationServer::Handle_QThreadSuffixSupported (StringExtractorGDBRemote &packet) 3989 { 3990 m_thread_suffix_supported = true; 3991 return SendOKResponse(); 3992 } 3993 3994 GDBRemoteCommunicationServer::PacketResult 3995 GDBRemoteCommunicationServer::Handle_QListThreadsInStopReply (StringExtractorGDBRemote &packet) 3996 { 3997 m_list_threads_in_stop_reply = true; 3998 return SendOKResponse(); 3999 } 4000 4001 GDBRemoteCommunicationServer::PacketResult 4002 GDBRemoteCommunicationServer::Handle_qXfer_auxv_read (StringExtractorGDBRemote &packet) 4003 { 4004 // We don't support if we're not llgs. 4005 if (!IsGdbServer()) 4006 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4007 4008 // *BSD impls should be able to do this too. 4009 #if defined(__linux__) 4010 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4011 4012 // Parse out the offset. 4013 packet.SetFilePos (strlen("qXfer:auxv:read::")); 4014 if (packet.GetBytesLeft () < 1) 4015 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); 4016 4017 const uint64_t auxv_offset = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ()); 4018 if (auxv_offset == std::numeric_limits<uint64_t>::max ()) 4019 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing offset"); 4020 4021 // Parse out comma. 4022 if (packet.GetBytesLeft () < 1 || packet.GetChar () != ',') 4023 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing comma after offset"); 4024 4025 // Parse out the length. 4026 const uint64_t auxv_length = packet.GetHexMaxU64 (false, std::numeric_limits<uint64_t>::max ()); 4027 if (auxv_length == std::numeric_limits<uint64_t>::max ()) 4028 return SendIllFormedResponse (packet, "qXfer:auxv:read:: packet missing length"); 4029 4030 // Grab the auxv data if we need it. 4031 if (!m_active_auxv_buffer_sp) 4032 { 4033 // Make sure we have a valid process. 4034 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 4035 { 4036 if (log) 4037 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 4038 return SendErrorResponse (0x10); 4039 } 4040 4041 // Grab the auxv data. 4042 m_active_auxv_buffer_sp = Host::GetAuxvData (m_debugged_process_sp->GetID ()); 4043 if (!m_active_auxv_buffer_sp || m_active_auxv_buffer_sp->GetByteSize () == 0) 4044 { 4045 // Hmm, no auxv data, call that an error. 4046 if (log) 4047 log->Printf ("GDBRemoteCommunicationServer::%s failed, no auxv data retrieved", __FUNCTION__); 4048 m_active_auxv_buffer_sp.reset (); 4049 return SendErrorResponse (0x11); 4050 } 4051 } 4052 4053 // FIXME find out if/how I lock the stream here. 4054 4055 StreamGDBRemote response; 4056 bool done_with_buffer = false; 4057 4058 if (auxv_offset >= m_active_auxv_buffer_sp->GetByteSize ()) 4059 { 4060 // We have nothing left to send. Mark the buffer as complete. 4061 response.PutChar ('l'); 4062 done_with_buffer = true; 4063 } 4064 else 4065 { 4066 // Figure out how many bytes are available starting at the given offset. 4067 const uint64_t bytes_remaining = m_active_auxv_buffer_sp->GetByteSize () - auxv_offset; 4068 4069 // Figure out how many bytes we're going to read. 4070 const uint64_t bytes_to_read = (auxv_length > bytes_remaining) ? bytes_remaining : auxv_length; 4071 4072 // Mark the response type according to whether we're reading the remainder of the auxv data. 4073 if (bytes_to_read >= bytes_remaining) 4074 { 4075 // There will be nothing left to read after this 4076 response.PutChar ('l'); 4077 done_with_buffer = true; 4078 } 4079 else 4080 { 4081 // There will still be bytes to read after this request. 4082 response.PutChar ('m'); 4083 } 4084 4085 // Now write the data in encoded binary form. 4086 response.PutEscapedBytes (m_active_auxv_buffer_sp->GetBytes () + auxv_offset, bytes_to_read); 4087 } 4088 4089 if (done_with_buffer) 4090 m_active_auxv_buffer_sp.reset (); 4091 4092 return SendPacketNoLock(response.GetData(), response.GetSize()); 4093 #else 4094 return SendUnimplementedResponse ("not implemented on this platform"); 4095 #endif 4096 } 4097 4098 GDBRemoteCommunicationServer::PacketResult 4099 GDBRemoteCommunicationServer::Handle_QSaveRegisterState (StringExtractorGDBRemote &packet) 4100 { 4101 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4102 4103 // We don't support if we're not llgs. 4104 if (!IsGdbServer()) 4105 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4106 4107 // Move past packet name. 4108 packet.SetFilePos (strlen ("QSaveRegisterState")); 4109 4110 // Get the thread to use. 4111 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 4112 if (!thread_sp) 4113 { 4114 if (m_thread_suffix_supported) 4115 return SendIllFormedResponse (packet, "No thread specified in QSaveRegisterState packet"); 4116 else 4117 return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); 4118 } 4119 4120 // Grab the register context for the thread. 4121 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 4122 if (!reg_context_sp) 4123 { 4124 if (log) 4125 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " tid %" PRIu64 " failed, no register context available for the thread", __FUNCTION__, m_debugged_process_sp->GetID (), thread_sp->GetID ()); 4126 return SendErrorResponse (0x15); 4127 } 4128 4129 // Save registers to a buffer. 4130 DataBufferSP register_data_sp; 4131 Error error = reg_context_sp->ReadAllRegisterValues (register_data_sp); 4132 if (error.Fail ()) 4133 { 4134 if (log) 4135 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to save all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4136 return SendErrorResponse (0x75); 4137 } 4138 4139 // Allocate a new save id. 4140 const uint32_t save_id = GetNextSavedRegistersID (); 4141 assert ((m_saved_registers_map.find (save_id) == m_saved_registers_map.end ()) && "GetNextRegisterSaveID() returned an existing register save id"); 4142 4143 // Save the register data buffer under the save id. 4144 { 4145 Mutex::Locker locker (m_saved_registers_mutex); 4146 m_saved_registers_map[save_id] = register_data_sp; 4147 } 4148 4149 // Write the response. 4150 StreamGDBRemote response; 4151 response.Printf ("%" PRIu32, save_id); 4152 return SendPacketNoLock(response.GetData(), response.GetSize()); 4153 } 4154 4155 GDBRemoteCommunicationServer::PacketResult 4156 GDBRemoteCommunicationServer::Handle_QRestoreRegisterState (StringExtractorGDBRemote &packet) 4157 { 4158 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4159 4160 // We don't support if we're not llgs. 4161 if (!IsGdbServer()) 4162 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4163 4164 // Parse out save id. 4165 packet.SetFilePos (strlen ("QRestoreRegisterState:")); 4166 if (packet.GetBytesLeft () < 1) 4167 return SendIllFormedResponse (packet, "QRestoreRegisterState packet missing register save id"); 4168 4169 const uint32_t save_id = packet.GetU32 (0); 4170 if (save_id == 0) 4171 { 4172 if (log) 4173 log->Printf ("GDBRemoteCommunicationServer::%s QRestoreRegisterState packet has malformed save id, expecting decimal uint32_t", __FUNCTION__); 4174 return SendErrorResponse (0x76); 4175 } 4176 4177 // Get the thread to use. 4178 NativeThreadProtocolSP thread_sp = GetThreadFromSuffix (packet); 4179 if (!thread_sp) 4180 { 4181 if (m_thread_suffix_supported) 4182 return SendIllFormedResponse (packet, "No thread specified in QRestoreRegisterState packet"); 4183 else 4184 return SendIllFormedResponse (packet, "No thread was is set with the Hg packet"); 4185 } 4186 4187 // Grab the register context for the thread. 4188 NativeRegisterContextSP reg_context_sp (thread_sp->GetRegisterContext ()); 4189 if (!reg_context_sp) 4190 { 4191 if (log) 4192 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 ()); 4193 return SendErrorResponse (0x15); 4194 } 4195 4196 // Retrieve register state buffer, then remove from the list. 4197 DataBufferSP register_data_sp; 4198 { 4199 Mutex::Locker locker (m_saved_registers_mutex); 4200 4201 // Find the register set buffer for the given save id. 4202 auto it = m_saved_registers_map.find (save_id); 4203 if (it == m_saved_registers_map.end ()) 4204 { 4205 if (log) 4206 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); 4207 return SendErrorResponse (0x77); 4208 } 4209 register_data_sp = it->second; 4210 4211 // Remove it from the map. 4212 m_saved_registers_map.erase (it); 4213 } 4214 4215 Error error = reg_context_sp->WriteAllRegisterValues (register_data_sp); 4216 if (error.Fail ()) 4217 { 4218 if (log) 4219 log->Printf ("GDBRemoteCommunicationServer::%s pid %" PRIu64 " failed to restore all register values: %s", __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4220 return SendErrorResponse (0x77); 4221 } 4222 4223 return SendOKResponse(); 4224 } 4225 4226 GDBRemoteCommunicationServer::PacketResult 4227 GDBRemoteCommunicationServer::Handle_vAttach (StringExtractorGDBRemote &packet) 4228 { 4229 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4230 4231 // We don't support if we're not llgs. 4232 if (!IsGdbServer()) 4233 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4234 4235 // Consume the ';' after vAttach. 4236 packet.SetFilePos (strlen ("vAttach")); 4237 if (!packet.GetBytesLeft () || packet.GetChar () != ';') 4238 return SendIllFormedResponse (packet, "vAttach missing expected ';'"); 4239 4240 // Grab the PID to which we will attach (assume hex encoding). 4241 lldb::pid_t pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16); 4242 if (pid == LLDB_INVALID_PROCESS_ID) 4243 return SendIllFormedResponse (packet, "vAttach failed to parse the process id"); 4244 4245 // Attempt to attach. 4246 if (log) 4247 log->Printf ("GDBRemoteCommunicationServer::%s attempting to attach to pid %" PRIu64, __FUNCTION__, pid); 4248 4249 Error error = AttachToProcess (pid); 4250 4251 if (error.Fail ()) 4252 { 4253 if (log) 4254 log->Printf ("GDBRemoteCommunicationServer::%s failed to attach to pid %" PRIu64 ": %s\n", __FUNCTION__, pid, error.AsCString()); 4255 return SendErrorResponse (0x01); 4256 } 4257 4258 // Notify we attached by sending a stop packet. 4259 return SendStopReasonForState (m_debugged_process_sp->GetState (), true); 4260 } 4261 4262 GDBRemoteCommunicationServer::PacketResult 4263 GDBRemoteCommunicationServer::Handle_D (StringExtractorGDBRemote &packet) 4264 { 4265 Log *log (GetLogIfAnyCategoriesSet (LIBLLDB_LOG_PROCESS)); 4266 4267 // We don't support if we're not llgs. 4268 if (!IsGdbServer()) 4269 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4270 4271 // Scope for mutex locker. 4272 Mutex::Locker locker (m_spawned_pids_mutex); 4273 4274 // Fail if we don't have a current process. 4275 if (!m_debugged_process_sp || (m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID)) 4276 { 4277 if (log) 4278 log->Printf ("GDBRemoteCommunicationServer::%s failed, no process available", __FUNCTION__); 4279 return SendErrorResponse (0x15); 4280 } 4281 4282 if (m_spawned_pids.find(m_debugged_process_sp->GetID ()) == m_spawned_pids.end()) 4283 { 4284 if (log) 4285 log->Printf ("GDBRemoteCommunicationServer::%s failed to find PID %" PRIu64 " in spawned pids list", 4286 __FUNCTION__, m_debugged_process_sp->GetID ()); 4287 return SendErrorResponse (0x1); 4288 } 4289 4290 lldb::pid_t pid = LLDB_INVALID_PROCESS_ID; 4291 4292 // Consume the ';' after D. 4293 packet.SetFilePos (1); 4294 if (packet.GetBytesLeft ()) 4295 { 4296 if (packet.GetChar () != ';') 4297 return SendIllFormedResponse (packet, "D missing expected ';'"); 4298 4299 // Grab the PID from which we will detach (assume hex encoding). 4300 pid = packet.GetU32 (LLDB_INVALID_PROCESS_ID, 16); 4301 if (pid == LLDB_INVALID_PROCESS_ID) 4302 return SendIllFormedResponse (packet, "D failed to parse the process id"); 4303 } 4304 4305 if (pid != LLDB_INVALID_PROCESS_ID && 4306 m_debugged_process_sp->GetID () != pid) 4307 { 4308 return SendIllFormedResponse (packet, "Invalid pid"); 4309 } 4310 4311 if (m_stdio_communication.IsConnected ()) 4312 { 4313 m_stdio_communication.StopReadThread (); 4314 } 4315 4316 const Error error = m_debugged_process_sp->Detach (); 4317 if (error.Fail ()) 4318 { 4319 if (log) 4320 log->Printf ("GDBRemoteCommunicationServer::%s failed to detach from pid %" PRIu64 ": %s\n", 4321 __FUNCTION__, m_debugged_process_sp->GetID (), error.AsCString ()); 4322 return SendErrorResponse (0x01); 4323 } 4324 4325 m_spawned_pids.erase (m_debugged_process_sp->GetID ()); 4326 return SendOKResponse (); 4327 } 4328 4329 GDBRemoteCommunicationServer::PacketResult 4330 GDBRemoteCommunicationServer::Handle_qThreadStopInfo (StringExtractorGDBRemote &packet) 4331 { 4332 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4333 4334 // We don't support if we're not llgs. 4335 if (!IsGdbServer()) 4336 return SendUnimplementedResponse ("only supported for lldb-gdbserver"); 4337 4338 packet.SetFilePos (strlen("qThreadStopInfo")); 4339 const lldb::tid_t tid = packet.GetHexMaxU32 (false, LLDB_INVALID_THREAD_ID); 4340 if (tid == LLDB_INVALID_THREAD_ID) 4341 { 4342 if (log) 4343 log->Printf ("GDBRemoteCommunicationServer::%s failed, could not parse thread id from request \"%s\"", __FUNCTION__, packet.GetStringRef ().c_str ()); 4344 return SendErrorResponse (0x15); 4345 } 4346 return SendStopReplyPacketForThread (tid); 4347 } 4348 4349 GDBRemoteCommunicationServer::PacketResult 4350 GDBRemoteCommunicationServer::Handle_qWatchpointSupportInfo (StringExtractorGDBRemote &packet) 4351 { 4352 // Only the gdb server handles this. 4353 if (!IsGdbServer ()) 4354 return SendUnimplementedResponse (packet.GetStringRef ().c_str ()); 4355 4356 // Fail if we don't have a current process. 4357 if (!m_debugged_process_sp || 4358 m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID) 4359 return SendErrorResponse (68); 4360 4361 packet.SetFilePos(strlen("qWatchpointSupportInfo")); 4362 if (packet.GetBytesLeft() == 0) 4363 return SendOKResponse(); 4364 if (packet.GetChar() != ':') 4365 return SendErrorResponse(67); 4366 4367 uint32_t num = m_debugged_process_sp->GetMaxWatchpoints(); 4368 StreamGDBRemote response; 4369 response.Printf ("num:%d;", num); 4370 return SendPacketNoLock(response.GetData(), response.GetSize()); 4371 } 4372 4373 void 4374 GDBRemoteCommunicationServer::FlushInferiorOutput () 4375 { 4376 // If we're not monitoring an inferior's terminal, ignore this. 4377 if (!m_stdio_communication.IsConnected()) 4378 return; 4379 4380 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_THREAD)); 4381 if (log) 4382 log->Printf ("GDBRemoteCommunicationServer::%s() called", __FUNCTION__); 4383 4384 // FIXME implement a timeout on the join. 4385 m_stdio_communication.JoinReadThread(); 4386 } 4387 4388 void 4389 GDBRemoteCommunicationServer::MaybeCloseInferiorTerminalConnection () 4390 { 4391 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS)); 4392 4393 // Tell the stdio connection to shut down. 4394 if (m_stdio_communication.IsConnected()) 4395 { 4396 auto connection = m_stdio_communication.GetConnection(); 4397 if (connection) 4398 { 4399 Error error; 4400 connection->Disconnect (&error); 4401 4402 if (error.Success ()) 4403 { 4404 if (log) 4405 log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - SUCCESS", __FUNCTION__); 4406 } 4407 else 4408 { 4409 if (log) 4410 log->Printf ("GDBRemoteCommunicationServer::%s disconnect process terminal stdio - FAIL: %s", __FUNCTION__, error.AsCString ()); 4411 } 4412 } 4413 } 4414 } 4415 4416 4417 lldb_private::NativeThreadProtocolSP 4418 GDBRemoteCommunicationServer::GetThreadFromSuffix (StringExtractorGDBRemote &packet) 4419 { 4420 NativeThreadProtocolSP thread_sp; 4421 4422 // We have no thread if we don't have a process. 4423 if (!m_debugged_process_sp || m_debugged_process_sp->GetID () == LLDB_INVALID_PROCESS_ID) 4424 return thread_sp; 4425 4426 // If the client hasn't asked for thread suffix support, there will not be a thread suffix. 4427 // Use the current thread in that case. 4428 if (!m_thread_suffix_supported) 4429 { 4430 const lldb::tid_t current_tid = GetCurrentThreadID (); 4431 if (current_tid == LLDB_INVALID_THREAD_ID) 4432 return thread_sp; 4433 else if (current_tid == 0) 4434 { 4435 // Pick a thread. 4436 return m_debugged_process_sp->GetThreadAtIndex (0); 4437 } 4438 else 4439 return m_debugged_process_sp->GetThreadByID (current_tid); 4440 } 4441 4442 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD)); 4443 4444 // Parse out the ';'. 4445 if (packet.GetBytesLeft () < 1 || packet.GetChar () != ';') 4446 { 4447 if (log) 4448 log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected ';' prior to start of thread suffix: packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); 4449 return thread_sp; 4450 } 4451 4452 if (!packet.GetBytesLeft ()) 4453 return thread_sp; 4454 4455 // Parse out thread: portion. 4456 if (strncmp (packet.Peek (), "thread:", strlen("thread:")) != 0) 4457 { 4458 if (log) 4459 log->Printf ("GDBRemoteCommunicationServer::%s gdb-remote parse error: expected 'thread:' but not found, packet contents = '%s'", __FUNCTION__, packet.GetStringRef ().c_str ()); 4460 return thread_sp; 4461 } 4462 packet.SetFilePos (packet.GetFilePos () + strlen("thread:")); 4463 const lldb::tid_t tid = packet.GetHexMaxU64(false, 0); 4464 if (tid != 0) 4465 return m_debugged_process_sp->GetThreadByID (tid); 4466 4467 return thread_sp; 4468 } 4469 4470 lldb::tid_t 4471 GDBRemoteCommunicationServer::GetCurrentThreadID () const 4472 { 4473 if (m_current_tid == 0 || m_current_tid == LLDB_INVALID_THREAD_ID) 4474 { 4475 // Use whatever the debug process says is the current thread id 4476 // since the protocol either didn't specify or specified we want 4477 // any/all threads marked as the current thread. 4478 if (!m_debugged_process_sp) 4479 return LLDB_INVALID_THREAD_ID; 4480 return m_debugged_process_sp->GetCurrentThreadID (); 4481 } 4482 // Use the specific current thread id set by the gdb remote protocol. 4483 return m_current_tid; 4484 } 4485 4486 uint32_t 4487 GDBRemoteCommunicationServer::GetNextSavedRegistersID () 4488 { 4489 Mutex::Locker locker (m_saved_registers_mutex); 4490 return m_next_saved_registers_id++; 4491 } 4492 4493 void 4494 GDBRemoteCommunicationServer::ClearProcessSpecificData () 4495 { 4496 Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS|GDBR_LOG_PROCESS)); 4497 if (log) 4498 log->Printf ("GDBRemoteCommunicationServer::%s()", __FUNCTION__); 4499 4500 // Clear any auxv cached data. 4501 // *BSD impls should be able to do this too. 4502 #if defined(__linux__) 4503 if (log) 4504 log->Printf ("GDBRemoteCommunicationServer::%s clearing auxv buffer (previously %s)", 4505 __FUNCTION__, 4506 m_active_auxv_buffer_sp ? "was set" : "was not set"); 4507 m_active_auxv_buffer_sp.reset (); 4508 #endif 4509 } 4510