1 //===-- debugserver.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 <sys/socket.h> 11 #include <sys/types.h> 12 #include <errno.h> 13 #include <getopt.h> 14 #include <netinet/in.h> 15 #include <sys/select.h> 16 #include <sys/sysctl.h> 17 #include <string> 18 #include <vector> 19 #include <asl.h> 20 #include <arpa/inet.h> 21 #include <netdb.h> 22 #include <netinet/in.h> 23 #include <netinet/tcp.h> 24 #include <sys/un.h> 25 #include <sys/types.h> 26 #include <crt_externs.h> // for _NSGetEnviron() 27 28 #if defined (__APPLE__) 29 #include <sched.h> 30 extern "C" int proc_set_wakemon_params(pid_t, int, int); // <libproc_internal.h> SPI 31 #endif 32 33 #include "CFString.h" 34 #include "DNB.h" 35 #include "DNBLog.h" 36 #include "DNBTimer.h" 37 #include "PseudoTerminal.h" 38 #include "RNBContext.h" 39 #include "RNBServices.h" 40 #include "RNBSocket.h" 41 #include "RNBRemote.h" 42 #include "SysSignal.h" 43 44 // Global PID in case we get a signal and need to stop the process... 45 nub_process_t g_pid = INVALID_NUB_PROCESS; 46 47 //---------------------------------------------------------------------- 48 // Run loop modes which determine which run loop function will be called 49 //---------------------------------------------------------------------- 50 typedef enum 51 { 52 eRNBRunLoopModeInvalid = 0, 53 eRNBRunLoopModeGetStartModeFromRemoteProtocol, 54 eRNBRunLoopModeInferiorAttaching, 55 eRNBRunLoopModeInferiorLaunching, 56 eRNBRunLoopModeInferiorExecuting, 57 eRNBRunLoopModePlatformMode, 58 eRNBRunLoopModeExit 59 } RNBRunLoopMode; 60 61 62 //---------------------------------------------------------------------- 63 // Global Variables 64 //---------------------------------------------------------------------- 65 RNBRemoteSP g_remoteSP; 66 static int g_lockdown_opt = 0; 67 static int g_applist_opt = 0; 68 static nub_launch_flavor_t g_launch_flavor = eLaunchFlavorDefault; 69 int g_disable_aslr = 0; 70 71 int g_isatty = 0; 72 bool g_detach_on_error = true; 73 74 #define RNBLogSTDOUT(fmt, ...) do { if (g_isatty) { fprintf(stdout, fmt, ## __VA_ARGS__); } else { _DNBLog(0, fmt, ## __VA_ARGS__); } } while (0) 75 #define RNBLogSTDERR(fmt, ...) do { if (g_isatty) { fprintf(stderr, fmt, ## __VA_ARGS__); } else { _DNBLog(0, fmt, ## __VA_ARGS__); } } while (0) 76 77 //---------------------------------------------------------------------- 78 // Get our program path and arguments from the remote connection. 79 // We will need to start up the remote connection without a PID, get the 80 // arguments, wait for the new process to finish launching and hit its 81 // entry point, and then return the run loop mode that should come next. 82 //---------------------------------------------------------------------- 83 RNBRunLoopMode 84 RNBRunLoopGetStartModeFromRemote (RNBRemote* remote) 85 { 86 std::string packet; 87 88 if (remote) 89 { 90 RNBContext& ctx = remote->Context(); 91 uint32_t event_mask = RNBContext::event_read_packet_available | 92 RNBContext::event_read_thread_exiting; 93 94 // Spin waiting to get the A packet. 95 while (1) 96 { 97 DNBLogThreadedIf (LOG_RNB_MAX, "%s ctx.Events().WaitForSetEvents( 0x%08x ) ...",__FUNCTION__, event_mask); 98 nub_event_t set_events = ctx.Events().WaitForSetEvents(event_mask); 99 DNBLogThreadedIf (LOG_RNB_MAX, "%s ctx.Events().WaitForSetEvents( 0x%08x ) => 0x%08x", __FUNCTION__, event_mask, set_events); 100 101 if (set_events & RNBContext::event_read_thread_exiting) 102 { 103 RNBLogSTDERR ("error: packet read thread exited.\n"); 104 return eRNBRunLoopModeExit; 105 } 106 107 if (set_events & RNBContext::event_read_packet_available) 108 { 109 rnb_err_t err = rnb_err; 110 RNBRemote::PacketEnum type; 111 112 err = remote->HandleReceivedPacket (&type); 113 114 // check if we tried to attach to a process 115 if (type == RNBRemote::vattach || type == RNBRemote::vattachwait || type == RNBRemote::vattachorwait) 116 { 117 if (err == rnb_success) 118 { 119 RNBLogSTDOUT ("Attach succeeded, ready to debug.\n"); 120 return eRNBRunLoopModeInferiorExecuting; 121 } 122 else 123 { 124 RNBLogSTDERR ("error: attach failed.\n"); 125 return eRNBRunLoopModeExit; 126 } 127 } 128 129 if (err == rnb_success) 130 { 131 // If we got our arguments we are ready to launch using the arguments 132 // and any environment variables we received. 133 if (type == RNBRemote::set_argv) 134 { 135 return eRNBRunLoopModeInferiorLaunching; 136 } 137 } 138 else if (err == rnb_not_connected) 139 { 140 RNBLogSTDERR ("error: connection lost.\n"); 141 return eRNBRunLoopModeExit; 142 } 143 else 144 { 145 // a catch all for any other gdb remote packets that failed 146 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s Error getting packet.",__FUNCTION__); 147 continue; 148 } 149 150 DNBLogThreadedIf (LOG_RNB_MINIMAL, "#### %s", __FUNCTION__); 151 } 152 else 153 { 154 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s Connection closed before getting \"A\" packet.", __FUNCTION__); 155 return eRNBRunLoopModeExit; 156 } 157 } 158 } 159 return eRNBRunLoopModeExit; 160 } 161 162 163 //---------------------------------------------------------------------- 164 // This run loop mode will wait for the process to launch and hit its 165 // entry point. It will currently ignore all events except for the 166 // process state changed event, where it watches for the process stopped 167 // or crash process state. 168 //---------------------------------------------------------------------- 169 RNBRunLoopMode 170 RNBRunLoopLaunchInferior (RNBRemote *remote, const char *stdin_path, const char *stdout_path, const char *stderr_path, bool no_stdio) 171 { 172 RNBContext& ctx = remote->Context(); 173 174 // The Process stuff takes a c array, the RNBContext has a vector... 175 // So make up a c array. 176 177 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s Launching '%s'...", __FUNCTION__, ctx.ArgumentAtIndex(0)); 178 179 size_t inferior_argc = ctx.ArgumentCount(); 180 // Initialize inferior_argv with inferior_argc + 1 NULLs 181 std::vector<const char *> inferior_argv(inferior_argc + 1, NULL); 182 183 size_t i; 184 for (i = 0; i < inferior_argc; i++) 185 inferior_argv[i] = ctx.ArgumentAtIndex(i); 186 187 // Pass the environment array the same way: 188 189 size_t inferior_envc = ctx.EnvironmentCount(); 190 // Initialize inferior_argv with inferior_argc + 1 NULLs 191 std::vector<const char *> inferior_envp(inferior_envc + 1, NULL); 192 193 for (i = 0; i < inferior_envc; i++) 194 inferior_envp[i] = ctx.EnvironmentAtIndex(i); 195 196 // Our launch type hasn't been set to anything concrete, so we need to 197 // figure our how we are going to launch automatically. 198 199 nub_launch_flavor_t launch_flavor = g_launch_flavor; 200 if (launch_flavor == eLaunchFlavorDefault) 201 { 202 // Our default launch method is posix spawn 203 launch_flavor = eLaunchFlavorPosixSpawn; 204 205 #if defined WITH_FBS 206 // Check if we have an app bundle, if so launch using BackBoard Services. 207 if (strstr(inferior_argv[0], ".app")) 208 { 209 launch_flavor = eLaunchFlavorFBS; 210 } 211 #elif defined WITH_BKS 212 // Check if we have an app bundle, if so launch using BackBoard Services. 213 if (strstr(inferior_argv[0], ".app")) 214 { 215 launch_flavor = eLaunchFlavorBKS; 216 } 217 #elif defined WITH_SPRINGBOARD 218 // Check if we have an app bundle, if so launch using SpringBoard. 219 if (strstr(inferior_argv[0], ".app")) 220 { 221 launch_flavor = eLaunchFlavorSpringBoard; 222 } 223 #endif 224 } 225 226 ctx.SetLaunchFlavor(launch_flavor); 227 char resolved_path[PATH_MAX]; 228 229 // If we fail to resolve the path to our executable, then just use what we 230 // were given and hope for the best 231 if ( !DNBResolveExecutablePath (inferior_argv[0], resolved_path, sizeof(resolved_path)) ) 232 ::strncpy(resolved_path, inferior_argv[0], sizeof(resolved_path)); 233 234 char launch_err_str[PATH_MAX]; 235 launch_err_str[0] = '\0'; 236 const char * cwd = (ctx.GetWorkingDirPath() != NULL ? ctx.GetWorkingDirPath() 237 : ctx.GetWorkingDirectory()); 238 const char *process_event = ctx.GetProcessEvent(); 239 nub_process_t pid = DNBProcessLaunch (resolved_path, 240 &inferior_argv[0], 241 &inferior_envp[0], 242 cwd, 243 stdin_path, 244 stdout_path, 245 stderr_path, 246 no_stdio, 247 launch_flavor, 248 g_disable_aslr, 249 process_event, 250 launch_err_str, 251 sizeof(launch_err_str)); 252 253 g_pid = pid; 254 255 if (pid == INVALID_NUB_PROCESS && strlen (launch_err_str) > 0) 256 { 257 DNBLogThreaded ("%s DNBProcessLaunch() returned error: '%s'", __FUNCTION__, launch_err_str); 258 ctx.LaunchStatus().SetError(-1, DNBError::Generic); 259 ctx.LaunchStatus().SetErrorString(launch_err_str); 260 } 261 else if (pid == INVALID_NUB_PROCESS) 262 { 263 DNBLogThreaded ("%s DNBProcessLaunch() failed to launch process, unknown failure", __FUNCTION__); 264 ctx.LaunchStatus().SetError(-1, DNBError::Generic); 265 ctx.LaunchStatus().SetErrorString("<unknown failure>"); 266 } 267 else 268 { 269 ctx.LaunchStatus().Clear(); 270 } 271 272 if (remote->Comm().IsConnected()) 273 { 274 // It we are connected already, the next thing gdb will do is ask 275 // whether the launch succeeded, and if not, whether there is an 276 // error code. So we need to fetch one packet from gdb before we wait 277 // on the stop from the target. 278 279 uint32_t event_mask = RNBContext::event_read_packet_available; 280 nub_event_t set_events = ctx.Events().WaitForSetEvents(event_mask); 281 282 if (set_events & RNBContext::event_read_packet_available) 283 { 284 rnb_err_t err = rnb_err; 285 RNBRemote::PacketEnum type; 286 287 err = remote->HandleReceivedPacket (&type); 288 289 if (err != rnb_success) 290 { 291 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s Error getting packet.", __FUNCTION__); 292 return eRNBRunLoopModeExit; 293 } 294 if (type != RNBRemote::query_launch_success) 295 { 296 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s Didn't get the expected qLaunchSuccess packet.", __FUNCTION__); 297 } 298 } 299 } 300 301 while (pid != INVALID_NUB_PROCESS) 302 { 303 // Wait for process to start up and hit entry point 304 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s DNBProcessWaitForEvent (%4.4x, eEventProcessRunningStateChanged | eEventProcessStoppedStateChanged, true, INFINITE)...", __FUNCTION__, pid); 305 nub_event_t set_events = DNBProcessWaitForEvents (pid, eEventProcessRunningStateChanged | eEventProcessStoppedStateChanged, true, NULL); 306 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s DNBProcessWaitForEvent (%4.4x, eEventProcessRunningStateChanged | eEventProcessStoppedStateChanged, true, INFINITE) => 0x%8.8x", __FUNCTION__, pid, set_events); 307 308 if (set_events == 0) 309 { 310 pid = INVALID_NUB_PROCESS; 311 g_pid = pid; 312 } 313 else 314 { 315 if (set_events & (eEventProcessRunningStateChanged | eEventProcessStoppedStateChanged)) 316 { 317 nub_state_t pid_state = DNBProcessGetState (pid); 318 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s process %4.4x state changed (eEventProcessStateChanged): %s", __FUNCTION__, pid, DNBStateAsString(pid_state)); 319 320 switch (pid_state) 321 { 322 case eStateInvalid: 323 case eStateUnloaded: 324 case eStateAttaching: 325 case eStateLaunching: 326 case eStateSuspended: 327 break; // Ignore 328 329 case eStateRunning: 330 case eStateStepping: 331 // Still waiting to stop at entry point... 332 break; 333 334 case eStateStopped: 335 case eStateCrashed: 336 ctx.SetProcessID(pid); 337 return eRNBRunLoopModeInferiorExecuting; 338 339 case eStateDetached: 340 case eStateExited: 341 pid = INVALID_NUB_PROCESS; 342 g_pid = pid; 343 return eRNBRunLoopModeExit; 344 } 345 } 346 347 DNBProcessResetEvents(pid, set_events); 348 } 349 } 350 351 return eRNBRunLoopModeExit; 352 } 353 354 355 //---------------------------------------------------------------------- 356 // This run loop mode will wait for the process to launch and hit its 357 // entry point. It will currently ignore all events except for the 358 // process state changed event, where it watches for the process stopped 359 // or crash process state. 360 //---------------------------------------------------------------------- 361 RNBRunLoopMode 362 RNBRunLoopLaunchAttaching (RNBRemote *remote, nub_process_t attach_pid, nub_process_t& pid) 363 { 364 RNBContext& ctx = remote->Context(); 365 366 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s Attaching to pid %i...", __FUNCTION__, attach_pid); 367 char err_str[1024]; 368 pid = DNBProcessAttach (attach_pid, NULL, err_str, sizeof(err_str)); 369 g_pid = pid; 370 371 if (pid == INVALID_NUB_PROCESS) 372 { 373 ctx.LaunchStatus().SetError(-1, DNBError::Generic); 374 if (err_str[0]) 375 ctx.LaunchStatus().SetErrorString(err_str); 376 return eRNBRunLoopModeExit; 377 } 378 else 379 { 380 ctx.SetProcessID(pid); 381 return eRNBRunLoopModeInferiorExecuting; 382 } 383 } 384 385 //---------------------------------------------------------------------- 386 // Watch for signals: 387 // SIGINT: so we can halt our inferior. (disabled for now) 388 // SIGPIPE: in case our child process dies 389 //---------------------------------------------------------------------- 390 int g_sigint_received = 0; 391 int g_sigpipe_received = 0; 392 void 393 signal_handler(int signo) 394 { 395 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s (%s)", __FUNCTION__, SysSignal::Name(signo)); 396 397 switch (signo) 398 { 399 case SIGINT: 400 g_sigint_received++; 401 if (g_pid != INVALID_NUB_PROCESS) 402 { 403 // Only send a SIGINT once... 404 if (g_sigint_received == 1) 405 { 406 switch (DNBProcessGetState (g_pid)) 407 { 408 case eStateRunning: 409 case eStateStepping: 410 DNBProcessSignal (g_pid, SIGSTOP); 411 return; 412 default: 413 break; 414 } 415 } 416 } 417 exit (SIGINT); 418 break; 419 420 case SIGPIPE: 421 g_sigpipe_received = 1; 422 break; 423 } 424 } 425 426 // Return the new run loop mode based off of the current process state 427 RNBRunLoopMode 428 HandleProcessStateChange (RNBRemote *remote, bool initialize) 429 { 430 RNBContext& ctx = remote->Context(); 431 nub_process_t pid = ctx.ProcessID(); 432 433 if (pid == INVALID_NUB_PROCESS) 434 { 435 DNBLogThreadedIf (LOG_RNB_MINIMAL, "#### %s error: pid invalid, exiting...", __FUNCTION__); 436 return eRNBRunLoopModeExit; 437 } 438 nub_state_t pid_state = DNBProcessGetState (pid); 439 440 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s (&remote, initialize=%i) pid_state = %s", __FUNCTION__, (int)initialize, DNBStateAsString (pid_state)); 441 442 switch (pid_state) 443 { 444 case eStateInvalid: 445 case eStateUnloaded: 446 // Something bad happened 447 return eRNBRunLoopModeExit; 448 break; 449 450 case eStateAttaching: 451 case eStateLaunching: 452 return eRNBRunLoopModeInferiorExecuting; 453 454 case eStateSuspended: 455 case eStateCrashed: 456 case eStateStopped: 457 // If we stop due to a signal, so clear the fact that we got a SIGINT 458 // so we can stop ourselves again (but only while our inferior 459 // process is running..) 460 g_sigint_received = 0; 461 if (initialize == false) 462 { 463 // Compare the last stop count to our current notion of a stop count 464 // to make sure we don't notify more than once for a given stop. 465 nub_size_t prev_pid_stop_count = ctx.GetProcessStopCount(); 466 bool pid_stop_count_changed = ctx.SetProcessStopCount(DNBProcessGetStopCount(pid)); 467 if (pid_stop_count_changed) 468 { 469 remote->FlushSTDIO(); 470 471 if (ctx.GetProcessStopCount() == 1) 472 { 473 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s (&remote, initialize=%i) pid_state = %s pid_stop_count %llu (old %llu)) Notify??? no, first stop...", __FUNCTION__, (int)initialize, DNBStateAsString (pid_state), (uint64_t)ctx.GetProcessStopCount(), (uint64_t)prev_pid_stop_count); 474 } 475 else 476 { 477 478 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s (&remote, initialize=%i) pid_state = %s pid_stop_count %llu (old %llu)) Notify??? YES!!!", __FUNCTION__, (int)initialize, DNBStateAsString (pid_state), (uint64_t)ctx.GetProcessStopCount(), (uint64_t)prev_pid_stop_count); 479 remote->NotifyThatProcessStopped (); 480 } 481 } 482 else 483 { 484 DNBLogThreadedIf (LOG_RNB_MINIMAL, "%s (&remote, initialize=%i) pid_state = %s pid_stop_count %llu (old %llu)) Notify??? skipping...", __FUNCTION__, (int)initialize, DNBStateAsString (pid_state), (uint64_t)ctx.GetProcessStopCount(), (uint64_t)prev_pid_stop_count); 485 } 486 } 487 return eRNBRunLoopModeInferiorExecuting; 488 489 case eStateStepping: 490 case eStateRunning: 491 return eRNBRunLoopModeInferiorExecuting; 492 493 case eStateExited: 494 remote->HandlePacket_last_signal(NULL); 495 case eStateDetached: 496 return eRNBRunLoopModeExit; 497 498 } 499 500 // Catch all... 501 return eRNBRunLoopModeExit; 502 } 503 // This function handles the case where our inferior program is stopped and 504 // we are waiting for gdb remote protocol packets. When a packet occurs that 505 // makes the inferior run, we need to leave this function with a new state 506 // as the return code. 507 RNBRunLoopMode 508 RNBRunLoopInferiorExecuting (RNBRemote *remote) 509 { 510 DNBLogThreadedIf (LOG_RNB_MINIMAL, "#### %s", __FUNCTION__); 511 RNBContext& ctx = remote->Context(); 512 513 // Init our mode and set 'is_running' based on the current process state 514 RNBRunLoopMode mode = HandleProcessStateChange (remote, true); 515 516 while (ctx.ProcessID() != INVALID_NUB_PROCESS) 517 { 518 519 std::string set_events_str; 520 uint32_t event_mask = ctx.NormalEventBits(); 521 522 if (!ctx.ProcessStateRunning()) 523 { 524 // Clear some bits if we are not running so we don't send any async packets 525 event_mask &= ~RNBContext::event_proc_stdio_available; 526 event_mask &= ~RNBContext::event_proc_profile_data; 527 } 528 529 // We want to make sure we consume all process state changes and have 530 // whomever is notifying us to wait for us to reset the event bit before 531 // continuing. 532 //ctx.Events().SetResetAckMask (RNBContext::event_proc_state_changed); 533 534 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s ctx.Events().WaitForSetEvents(0x%08x) ...",__FUNCTION__, event_mask); 535 nub_event_t set_events = ctx.Events().WaitForSetEvents(event_mask); 536 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s ctx.Events().WaitForSetEvents(0x%08x) => 0x%08x (%s)",__FUNCTION__, event_mask, set_events, ctx.EventsAsString(set_events, set_events_str)); 537 538 if (set_events) 539 { 540 if ((set_events & RNBContext::event_proc_thread_exiting) || 541 (set_events & RNBContext::event_proc_stdio_available)) 542 { 543 remote->FlushSTDIO(); 544 } 545 546 if (set_events & RNBContext::event_proc_profile_data) 547 { 548 remote->SendAsyncProfileData(); 549 } 550 551 if (set_events & RNBContext::event_read_packet_available) 552 { 553 // handleReceivedPacket will take care of resetting the 554 // event_read_packet_available events when there are no more... 555 set_events ^= RNBContext::event_read_packet_available; 556 557 if (ctx.ProcessStateRunning()) 558 { 559 if (remote->HandleAsyncPacket() == rnb_not_connected) 560 { 561 // TODO: connect again? Exit? 562 } 563 } 564 else 565 { 566 if (remote->HandleReceivedPacket() == rnb_not_connected) 567 { 568 // TODO: connect again? Exit? 569 } 570 } 571 } 572 573 if (set_events & RNBContext::event_proc_state_changed) 574 { 575 mode = HandleProcessStateChange (remote, false); 576 ctx.Events().ResetEvents(RNBContext::event_proc_state_changed); 577 set_events ^= RNBContext::event_proc_state_changed; 578 } 579 580 if (set_events & RNBContext::event_proc_thread_exiting) 581 { 582 mode = eRNBRunLoopModeExit; 583 } 584 585 if (set_events & RNBContext::event_read_thread_exiting) 586 { 587 // Out remote packet receiving thread exited, exit for now. 588 if (ctx.HasValidProcessID()) 589 { 590 // TODO: We should add code that will leave the current process 591 // in its current state and listen for another connection... 592 if (ctx.ProcessStateRunning()) 593 { 594 if (ctx.GetDetachOnError()) 595 { 596 DNBLog ("debugserver's event read thread is exiting, detaching from the inferior process."); 597 DNBProcessDetach (ctx.ProcessID()); 598 } 599 else 600 { 601 DNBLog ("debugserver's event read thread is exiting, killing the inferior process."); 602 DNBProcessKill (ctx.ProcessID()); 603 } 604 } 605 else 606 { 607 if (ctx.GetDetachOnError()) 608 { 609 DNBLog ("debugserver's event read thread is exiting, detaching from the inferior process."); 610 DNBProcessDetach (ctx.ProcessID()); 611 } 612 } 613 } 614 mode = eRNBRunLoopModeExit; 615 } 616 } 617 618 // Reset all event bits that weren't reset for now... 619 if (set_events != 0) 620 ctx.Events().ResetEvents(set_events); 621 622 if (mode != eRNBRunLoopModeInferiorExecuting) 623 break; 624 } 625 626 return mode; 627 } 628 629 630 RNBRunLoopMode 631 RNBRunLoopPlatform (RNBRemote *remote) 632 { 633 RNBRunLoopMode mode = eRNBRunLoopModePlatformMode; 634 RNBContext& ctx = remote->Context(); 635 636 while (mode == eRNBRunLoopModePlatformMode) 637 { 638 std::string set_events_str; 639 const uint32_t event_mask = RNBContext::event_read_packet_available | 640 RNBContext::event_read_thread_exiting; 641 642 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s ctx.Events().WaitForSetEvents(0x%08x) ...",__FUNCTION__, event_mask); 643 nub_event_t set_events = ctx.Events().WaitForSetEvents(event_mask); 644 DNBLogThreadedIf (LOG_RNB_EVENTS, "%s ctx.Events().WaitForSetEvents(0x%08x) => 0x%08x (%s)",__FUNCTION__, event_mask, set_events, ctx.EventsAsString(set_events, set_events_str)); 645 646 if (set_events) 647 { 648 if (set_events & RNBContext::event_read_packet_available) 649 { 650 if (remote->HandleReceivedPacket() == rnb_not_connected) 651 mode = eRNBRunLoopModeExit; 652 } 653 654 if (set_events & RNBContext::event_read_thread_exiting) 655 { 656 mode = eRNBRunLoopModeExit; 657 } 658 ctx.Events().ResetEvents(set_events); 659 } 660 } 661 return eRNBRunLoopModeExit; 662 } 663 664 //---------------------------------------------------------------------- 665 // Convenience function to set up the remote listening port 666 // Returns 1 for success 0 for failure. 667 //---------------------------------------------------------------------- 668 669 static void 670 PortWasBoundCallbackUnixSocket (const void *baton, in_port_t port) 671 { 672 //::printf ("PortWasBoundCallbackUnixSocket (baton = %p, port = %u)\n", baton, port); 673 674 const char *unix_socket_name = (const char *)baton; 675 676 if (unix_socket_name && unix_socket_name[0]) 677 { 678 // We were given a unix socket name to use to communicate the port 679 // that we ended up binding to back to our parent process 680 struct sockaddr_un saddr_un; 681 int s = ::socket (AF_UNIX, SOCK_STREAM, 0); 682 if (s < 0) 683 { 684 perror("error: socket (AF_UNIX, SOCK_STREAM, 0)"); 685 exit(1); 686 } 687 688 saddr_un.sun_family = AF_UNIX; 689 ::strncpy(saddr_un.sun_path, unix_socket_name, sizeof(saddr_un.sun_path) - 1); 690 saddr_un.sun_path[sizeof(saddr_un.sun_path) - 1] = '\0'; 691 saddr_un.sun_len = SUN_LEN (&saddr_un); 692 693 if (::connect (s, (struct sockaddr *)&saddr_un, static_cast<socklen_t>(SUN_LEN (&saddr_un))) < 0) 694 { 695 perror("error: connect (socket, &saddr_un, saddr_un_len)"); 696 exit(1); 697 } 698 699 //::printf ("connect () sucess!!\n"); 700 701 702 // We were able to connect to the socket, now write our PID so whomever 703 // launched us will know this process's ID 704 RNBLogSTDOUT ("Listening to port %i...\n", port); 705 706 char pid_str[64]; 707 const int pid_str_len = ::snprintf (pid_str, sizeof(pid_str), "%u", port); 708 const ssize_t bytes_sent = ::send (s, pid_str, pid_str_len, 0); 709 710 if (pid_str_len != bytes_sent) 711 { 712 perror("error: send (s, pid_str, pid_str_len, 0)"); 713 exit (1); 714 } 715 716 //::printf ("send () sucess!!\n"); 717 718 // We are done with the socket 719 close (s); 720 } 721 } 722 723 static void 724 PortWasBoundCallbackNamedPipe (const void *baton, uint16_t port) 725 { 726 const char *named_pipe = (const char *)baton; 727 if (named_pipe && named_pipe[0]) 728 { 729 int fd = ::open(named_pipe, O_WRONLY); 730 if (fd > -1) 731 { 732 char port_str[64]; 733 const ssize_t port_str_len = ::snprintf (port_str, sizeof(port_str), "%u", port); 734 // Write the port number as a C string with the NULL terminator 735 ::write (fd, port_str, port_str_len + 1); 736 close (fd); 737 } 738 } 739 } 740 741 static int 742 ConnectRemote (RNBRemote *remote, 743 const char *host, 744 int port, 745 bool reverse_connect, 746 const char *named_pipe_path, 747 const char *unix_socket_name) 748 { 749 if (!remote->Comm().IsConnected()) 750 { 751 if (reverse_connect) 752 { 753 if (port == 0) 754 { 755 DNBLogThreaded("error: invalid port supplied for reverse connection: %i.\n", port); 756 return 0; 757 } 758 if (remote->Comm().Connect(host, port) != rnb_success) 759 { 760 DNBLogThreaded("Failed to reverse connect to %s:%i.\n", host, port); 761 return 0; 762 } 763 } 764 else 765 { 766 if (port != 0) 767 RNBLogSTDOUT ("Listening to port %i for a connection from %s...\n", port, host ? host : "127.0.0.1"); 768 if (unix_socket_name && unix_socket_name[0]) 769 { 770 if (remote->Comm().Listen(host, port, PortWasBoundCallbackUnixSocket, unix_socket_name) != rnb_success) 771 { 772 RNBLogSTDERR ("Failed to get connection from a remote gdb process.\n"); 773 return 0; 774 } 775 } 776 else 777 { 778 if (remote->Comm().Listen(host, port, PortWasBoundCallbackNamedPipe, named_pipe_path) != rnb_success) 779 { 780 RNBLogSTDERR ("Failed to get connection from a remote gdb process.\n"); 781 return 0; 782 } 783 } 784 } 785 remote->StartReadRemoteDataThread(); 786 } 787 return 1; 788 } 789 790 //---------------------------------------------------------------------- 791 // ASL Logging callback that can be registered with DNBLogSetLogCallback 792 //---------------------------------------------------------------------- 793 void 794 ASLLogCallback(void *baton, uint32_t flags, const char *format, va_list args) 795 { 796 if (format == NULL) 797 return; 798 static aslmsg g_aslmsg = NULL; 799 if (g_aslmsg == NULL) 800 { 801 g_aslmsg = ::asl_new (ASL_TYPE_MSG); 802 char asl_key_sender[PATH_MAX]; 803 snprintf(asl_key_sender, sizeof(asl_key_sender), "com.apple.%s-%s", DEBUGSERVER_PROGRAM_NAME, DEBUGSERVER_VERSION_STR); 804 ::asl_set (g_aslmsg, ASL_KEY_SENDER, asl_key_sender); 805 } 806 807 int asl_level; 808 if (flags & DNBLOG_FLAG_FATAL) asl_level = ASL_LEVEL_CRIT; 809 else if (flags & DNBLOG_FLAG_ERROR) asl_level = ASL_LEVEL_ERR; 810 else if (flags & DNBLOG_FLAG_WARNING) asl_level = ASL_LEVEL_WARNING; 811 else if (flags & DNBLOG_FLAG_VERBOSE) asl_level = ASL_LEVEL_WARNING; //ASL_LEVEL_INFO; 812 else asl_level = ASL_LEVEL_WARNING; //ASL_LEVEL_DEBUG; 813 814 ::asl_vlog (NULL, g_aslmsg, asl_level, format, args); 815 } 816 817 //---------------------------------------------------------------------- 818 // FILE based Logging callback that can be registered with 819 // DNBLogSetLogCallback 820 //---------------------------------------------------------------------- 821 void 822 FileLogCallback(void *baton, uint32_t flags, const char *format, va_list args) 823 { 824 if (baton == NULL || format == NULL) 825 return; 826 827 ::vfprintf ((FILE *)baton, format, args); 828 ::fprintf ((FILE *)baton, "\n"); 829 } 830 831 832 void 833 show_usage_and_exit (int exit_code) 834 { 835 RNBLogSTDERR ("Usage:\n %s host:port [program-name program-arg1 program-arg2 ...]\n", DEBUGSERVER_PROGRAM_NAME); 836 RNBLogSTDERR (" %s /path/file [program-name program-arg1 program-arg2 ...]\n", DEBUGSERVER_PROGRAM_NAME); 837 RNBLogSTDERR (" %s host:port --attach=<pid>\n", DEBUGSERVER_PROGRAM_NAME); 838 RNBLogSTDERR (" %s /path/file --attach=<pid>\n", DEBUGSERVER_PROGRAM_NAME); 839 RNBLogSTDERR (" %s host:port --attach=<process_name>\n", DEBUGSERVER_PROGRAM_NAME); 840 RNBLogSTDERR (" %s /path/file --attach=<process_name>\n", DEBUGSERVER_PROGRAM_NAME); 841 exit (exit_code); 842 } 843 844 845 //---------------------------------------------------------------------- 846 // option descriptors for getopt_long_only() 847 //---------------------------------------------------------------------- 848 static struct option g_long_options[] = 849 { 850 { "attach", required_argument, NULL, 'a' }, 851 { "arch", required_argument, NULL, 'A' }, 852 { "debug", no_argument, NULL, 'g' }, 853 { "kill-on-error", no_argument, NULL, 'K' }, 854 { "verbose", no_argument, NULL, 'v' }, 855 { "lockdown", no_argument, &g_lockdown_opt, 1 }, // short option "-k" 856 { "applist", no_argument, &g_applist_opt, 1 }, // short option "-t" 857 { "log-file", required_argument, NULL, 'l' }, 858 { "log-flags", required_argument, NULL, 'f' }, 859 { "launch", required_argument, NULL, 'x' }, // Valid values are "auto", "posix-spawn", "fork-exec", "springboard" (arm only) 860 { "waitfor", required_argument, NULL, 'w' }, // Wait for a process whose name starts with ARG 861 { "waitfor-interval", required_argument, NULL, 'i' }, // Time in usecs to wait between sampling the pid list when waiting for a process by name 862 { "waitfor-duration", required_argument, NULL, 'd' }, // The time in seconds to wait for a process to show up by name 863 { "native-regs", no_argument, NULL, 'r' }, // Specify to use the native registers instead of the gdb defaults for the architecture. 864 { "stdio-path", required_argument, NULL, 's' }, // Set the STDIO path to be used when launching applications (STDIN, STDOUT and STDERR) (only if debugserver launches the process) 865 { "stdin-path", required_argument, NULL, 'I' }, // Set the STDIN path to be used when launching applications (only if debugserver launches the process) 866 { "stdout-path", required_argument, NULL, 'O' }, // Set the STDOUT path to be used when launching applications (only if debugserver launches the process) 867 { "stderr-path", required_argument, NULL, 'E' }, // Set the STDERR path to be used when launching applications (only if debugserver launches the process) 868 { "no-stdio", no_argument, NULL, 'n' }, // Do not set up any stdio (perhaps the program is a GUI program) (only if debugserver launches the process) 869 { "setsid", no_argument, NULL, 'S' }, // call setsid() to make debugserver run in its own session 870 { "disable-aslr", no_argument, NULL, 'D' }, // Use _POSIX_SPAWN_DISABLE_ASLR to avoid shared library randomization 871 { "working-dir", required_argument, NULL, 'W' }, // The working directory that the inferior process should have (only if debugserver launches the process) 872 { "platform", required_argument, NULL, 'p' }, // Put this executable into a remote platform mode 873 { "unix-socket", required_argument, NULL, 'u' }, // If we need to handshake with our parent process, an option will be passed down that specifies a unix socket name to use 874 { "named-pipe", required_argument, NULL, 'P' }, 875 { "reverse-connect", no_argument, NULL, 'R' }, 876 { "env", required_argument, NULL, 'e' }, // When debugserver launches the process, set a single environment entry as specified by the option value ("./debugserver -e FOO=1 -e BAR=2 localhost:1234 -- /bin/ls") 877 { "forward-env", no_argument, NULL, 'F' }, // When debugserver launches the process, forward debugserver's current environment variables to the child process ("./debugserver -F localhost:1234 -- /bin/ls" 878 { NULL, 0, NULL, 0 } 879 }; 880 881 882 //---------------------------------------------------------------------- 883 // main 884 //---------------------------------------------------------------------- 885 int 886 main (int argc, char *argv[]) 887 { 888 // If debugserver is launched with DYLD_INSERT_LIBRARIES, unset it so we 889 // don't spawn child processes with this enabled. 890 unsetenv("DYLD_INSERT_LIBRARIES"); 891 892 const char *argv_sub_zero = argv[0]; // save a copy of argv[0] for error reporting post-launch 893 894 #if defined (__APPLE__) 895 pthread_setname_np ("main thread"); 896 #if defined (__arm__) || defined (__arm64__) || defined (__aarch64__) 897 struct sched_param thread_param; 898 int thread_sched_policy; 899 if (pthread_getschedparam(pthread_self(), &thread_sched_policy, &thread_param) == 0) 900 { 901 thread_param.sched_priority = 47; 902 pthread_setschedparam(pthread_self(), thread_sched_policy, &thread_param); 903 } 904 905 ::proc_set_wakemon_params (getpid(), 500, 0); // Allow up to 500 wakeups/sec to avoid EXC_RESOURCE for normal use. 906 #endif 907 #endif 908 909 g_isatty = ::isatty (STDIN_FILENO); 910 911 // ::printf ("uid=%u euid=%u gid=%u egid=%u\n", 912 // getuid(), 913 // geteuid(), 914 // getgid(), 915 // getegid()); 916 917 918 // signal (SIGINT, signal_handler); 919 signal (SIGPIPE, signal_handler); 920 signal (SIGHUP, signal_handler); 921 922 // We're always sitting in waitpid or kevent waiting on our target process' death, 923 // we don't need no stinking SIGCHLD's... 924 925 sigset_t sigset; 926 sigemptyset(&sigset); 927 sigaddset(&sigset, SIGCHLD); 928 sigprocmask(SIG_BLOCK, &sigset, NULL); 929 930 g_remoteSP.reset (new RNBRemote ()); 931 932 933 RNBRemote *remote = g_remoteSP.get(); 934 if (remote == NULL) 935 { 936 RNBLogSTDERR ("error: failed to create a remote connection class\n"); 937 return -1; 938 } 939 940 RNBContext& ctx = remote->Context(); 941 942 int i; 943 int attach_pid = INVALID_NUB_PROCESS; 944 945 FILE* log_file = NULL; 946 uint32_t log_flags = 0; 947 // Parse our options 948 int ch; 949 int long_option_index = 0; 950 int debug = 0; 951 std::string compile_options; 952 std::string waitfor_pid_name; // Wait for a process that starts with this name 953 std::string attach_pid_name; 954 std::string arch_name; 955 std::string working_dir; // The new working directory to use for the inferior 956 std::string unix_socket_name; // If we need to handshake with our parent process, an option will be passed down that specifies a unix socket name to use 957 std::string named_pipe_path; // If we need to handshake with our parent process, an option will be passed down that specifies a named pipe to use 958 useconds_t waitfor_interval = 1000; // Time in usecs between process lists polls when waiting for a process by name, default 1 msec. 959 useconds_t waitfor_duration = 0; // Time in seconds to wait for a process by name, 0 means wait forever. 960 bool no_stdio = false; 961 bool reverse_connect = false; // Set to true by an option to indicate we should reverse connect to the host:port supplied as the first debugserver argument 962 963 #if !defined (DNBLOG_ENABLED) 964 compile_options += "(no-logging) "; 965 #endif 966 967 RNBRunLoopMode start_mode = eRNBRunLoopModeExit; 968 969 char short_options[512]; 970 uint32_t short_options_idx = 0; 971 972 // Handle the two case that don't have short options in g_long_options 973 short_options[short_options_idx++] = 'k'; 974 short_options[short_options_idx++] = 't'; 975 976 for (i=0; g_long_options[i].name != NULL; ++i) 977 { 978 if (isalpha(g_long_options[i].val)) 979 { 980 short_options[short_options_idx++] = g_long_options[i].val; 981 switch (g_long_options[i].has_arg) 982 { 983 default: 984 case no_argument: 985 break; 986 987 case optional_argument: 988 short_options[short_options_idx++] = ':'; 989 // Fall through to required_argument case below... 990 case required_argument: 991 short_options[short_options_idx++] = ':'; 992 break; 993 } 994 } 995 } 996 // NULL terminate the short option string. 997 short_options[short_options_idx++] = '\0'; 998 999 #if __GLIBC__ 1000 optind = 0; 1001 #else 1002 optreset = 1; 1003 optind = 1; 1004 #endif 1005 1006 while ((ch = getopt_long_only(argc, argv, short_options, g_long_options, &long_option_index)) != -1) 1007 { 1008 DNBLogDebug("option: ch == %c (0x%2.2x) --%s%c%s\n", 1009 ch, (uint8_t)ch, 1010 g_long_options[long_option_index].name, 1011 g_long_options[long_option_index].has_arg ? '=' : ' ', 1012 optarg ? optarg : ""); 1013 switch (ch) 1014 { 1015 case 0: // Any optional that auto set themselves will return 0 1016 break; 1017 1018 case 'A': 1019 if (optarg && optarg[0]) 1020 arch_name.assign(optarg); 1021 break; 1022 1023 case 'a': 1024 if (optarg && optarg[0]) 1025 { 1026 if (isdigit(optarg[0])) 1027 { 1028 char *end = NULL; 1029 attach_pid = static_cast<int>(strtoul(optarg, &end, 0)); 1030 if (end == NULL || *end != '\0') 1031 { 1032 RNBLogSTDERR ("error: invalid pid option '%s'\n", optarg); 1033 exit (4); 1034 } 1035 } 1036 else 1037 { 1038 attach_pid_name = optarg; 1039 } 1040 start_mode = eRNBRunLoopModeInferiorAttaching; 1041 } 1042 break; 1043 1044 // --waitfor=NAME 1045 case 'w': 1046 if (optarg && optarg[0]) 1047 { 1048 waitfor_pid_name = optarg; 1049 start_mode = eRNBRunLoopModeInferiorAttaching; 1050 } 1051 break; 1052 1053 // --waitfor-interval=USEC 1054 case 'i': 1055 if (optarg && optarg[0]) 1056 { 1057 char *end = NULL; 1058 waitfor_interval = static_cast<useconds_t>(strtoul(optarg, &end, 0)); 1059 if (end == NULL || *end != '\0') 1060 { 1061 RNBLogSTDERR ("error: invalid waitfor-interval option value '%s'.\n", optarg); 1062 exit (6); 1063 } 1064 } 1065 break; 1066 1067 // --waitfor-duration=SEC 1068 case 'd': 1069 if (optarg && optarg[0]) 1070 { 1071 char *end = NULL; 1072 waitfor_duration = static_cast<useconds_t>(strtoul(optarg, &end, 0)); 1073 if (end == NULL || *end != '\0') 1074 { 1075 RNBLogSTDERR ("error: invalid waitfor-duration option value '%s'.\n", optarg); 1076 exit (7); 1077 } 1078 } 1079 break; 1080 1081 case 'K': 1082 g_detach_on_error = false; 1083 break; 1084 case 'W': 1085 if (optarg && optarg[0]) 1086 working_dir.assign(optarg); 1087 break; 1088 1089 case 'x': 1090 if (optarg && optarg[0]) 1091 { 1092 if (strcasecmp(optarg, "auto") == 0) 1093 g_launch_flavor = eLaunchFlavorDefault; 1094 else if (strcasestr(optarg, "posix") == optarg) 1095 g_launch_flavor = eLaunchFlavorPosixSpawn; 1096 else if (strcasestr(optarg, "fork") == optarg) 1097 g_launch_flavor = eLaunchFlavorForkExec; 1098 #ifdef WITH_SPRINGBOARD 1099 else if (strcasestr(optarg, "spring") == optarg) 1100 g_launch_flavor = eLaunchFlavorSpringBoard; 1101 #endif 1102 #ifdef WITH_BKS 1103 else if (strcasestr(optarg, "backboard") == optarg) 1104 g_launch_flavor = eLaunchFlavorBKS; 1105 #endif 1106 #ifdef WITH_FBS 1107 else if (strcasestr(optarg, "frontboard") == optarg) 1108 g_launch_flavor = eLaunchFlavorFBS; 1109 #endif 1110 1111 else 1112 { 1113 RNBLogSTDERR ("error: invalid TYPE for the --launch=TYPE (-x TYPE) option: '%s'\n", optarg); 1114 RNBLogSTDERR ("Valid values TYPE are:\n"); 1115 RNBLogSTDERR (" auto Auto-detect the best launch method to use.\n"); 1116 RNBLogSTDERR (" posix Launch the executable using posix_spawn.\n"); 1117 RNBLogSTDERR (" fork Launch the executable using fork and exec.\n"); 1118 #ifdef WITH_SPRINGBOARD 1119 RNBLogSTDERR (" spring Launch the executable through Springboard.\n"); 1120 #endif 1121 #ifdef WITH_BKS 1122 RNBLogSTDERR (" backboard Launch the executable through BackBoard Services.\n"); 1123 #endif 1124 #ifdef WITH_FBS 1125 RNBLogSTDERR (" frontboard Launch the executable through FrontBoard Services.\n"); 1126 #endif 1127 exit (5); 1128 } 1129 } 1130 break; 1131 1132 case 'l': // Set Log File 1133 if (optarg && optarg[0]) 1134 { 1135 if (strcasecmp(optarg, "stdout") == 0) 1136 log_file = stdout; 1137 else if (strcasecmp(optarg, "stderr") == 0) 1138 log_file = stderr; 1139 else 1140 { 1141 log_file = fopen(optarg, "w"); 1142 if (log_file != NULL) 1143 setlinebuf(log_file); 1144 } 1145 1146 if (log_file == NULL) 1147 { 1148 const char *errno_str = strerror(errno); 1149 RNBLogSTDERR ("Failed to open log file '%s' for writing: errno = %i (%s)", optarg, errno, errno_str ? errno_str : "unknown error"); 1150 } 1151 } 1152 break; 1153 1154 case 'f': // Log Flags 1155 if (optarg && optarg[0]) 1156 log_flags = static_cast<uint32_t>(strtoul(optarg, NULL, 0)); 1157 break; 1158 1159 case 'g': 1160 debug = 1; 1161 DNBLogSetDebug(debug); 1162 break; 1163 1164 case 't': 1165 g_applist_opt = 1; 1166 break; 1167 1168 case 'k': 1169 g_lockdown_opt = 1; 1170 break; 1171 1172 case 'r': 1173 // Do nothing, native regs is the default these days 1174 break; 1175 1176 case 'R': 1177 reverse_connect = true; 1178 break; 1179 case 'v': 1180 DNBLogSetVerbose(1); 1181 break; 1182 1183 case 's': 1184 ctx.GetSTDIN().assign(optarg); 1185 ctx.GetSTDOUT().assign(optarg); 1186 ctx.GetSTDERR().assign(optarg); 1187 break; 1188 1189 case 'I': 1190 ctx.GetSTDIN().assign(optarg); 1191 break; 1192 1193 case 'O': 1194 ctx.GetSTDOUT().assign(optarg); 1195 break; 1196 1197 case 'E': 1198 ctx.GetSTDERR().assign(optarg); 1199 break; 1200 1201 case 'n': 1202 no_stdio = true; 1203 break; 1204 1205 case 'S': 1206 // Put debugserver into a new session. Terminals group processes 1207 // into sessions and when a special terminal key sequences 1208 // (like control+c) are typed they can cause signals to go out to 1209 // all processes in a session. Using this --setsid (-S) option 1210 // will cause debugserver to run in its own sessions and be free 1211 // from such issues. 1212 // 1213 // This is useful when debugserver is spawned from a command 1214 // line application that uses debugserver to do the debugging, 1215 // yet that application doesn't want debugserver receiving the 1216 // signals sent to the session (i.e. dying when anyone hits ^C). 1217 setsid(); 1218 break; 1219 case 'D': 1220 g_disable_aslr = 1; 1221 break; 1222 1223 case 'p': 1224 start_mode = eRNBRunLoopModePlatformMode; 1225 break; 1226 1227 case 'u': 1228 unix_socket_name.assign (optarg); 1229 break; 1230 1231 case 'P': 1232 named_pipe_path.assign (optarg); 1233 break; 1234 1235 case 'e': 1236 // Pass a single specified environment variable down to the process that gets launched 1237 remote->Context().PushEnvironment(optarg); 1238 break; 1239 1240 case 'F': 1241 // Pass the current environment down to the process that gets launched 1242 { 1243 char **host_env = *_NSGetEnviron(); 1244 char *env_entry; 1245 size_t i; 1246 for (i=0; (env_entry = host_env[i]) != NULL; ++i) 1247 remote->Context().PushEnvironment(env_entry); 1248 } 1249 break; 1250 } 1251 } 1252 1253 if (arch_name.empty()) 1254 { 1255 #if defined (__arm__) 1256 arch_name.assign ("arm"); 1257 #endif 1258 } 1259 else 1260 { 1261 DNBSetArchitecture (arch_name.c_str()); 1262 } 1263 1264 // if (arch_name.empty()) 1265 // { 1266 // fprintf(stderr, "error: no architecture was specified\n"); 1267 // exit (8); 1268 // } 1269 // Skip any options we consumed with getopt_long_only 1270 argc -= optind; 1271 argv += optind; 1272 1273 1274 if (!working_dir.empty()) 1275 { 1276 if (remote->Context().SetWorkingDirectory (working_dir.c_str()) == false) 1277 { 1278 RNBLogSTDERR ("error: working directory doesn't exist '%s'.\n", working_dir.c_str()); 1279 exit (8); 1280 } 1281 } 1282 1283 remote->Context().SetDetachOnError(g_detach_on_error); 1284 1285 remote->Initialize(); 1286 1287 // It is ok for us to set NULL as the logfile (this will disable any logging) 1288 1289 if (log_file != NULL) 1290 { 1291 DNBLogSetLogCallback(FileLogCallback, log_file); 1292 // If our log file was set, yet we have no log flags, log everything! 1293 if (log_flags == 0) 1294 log_flags = LOG_ALL | LOG_RNB_ALL; 1295 1296 DNBLogSetLogMask (log_flags); 1297 } 1298 else 1299 { 1300 // Enable DNB logging 1301 DNBLogSetLogCallback(ASLLogCallback, NULL); 1302 DNBLogSetLogMask (log_flags); 1303 1304 } 1305 1306 if (DNBLogEnabled()) 1307 { 1308 for (i=0; i<argc; i++) 1309 DNBLogDebug("argv[%i] = %s", i, argv[i]); 1310 } 1311 1312 // as long as we're dropping remotenub in as a replacement for gdbserver, 1313 // explicitly note that this is not gdbserver. 1314 1315 RNBLogSTDOUT ("%s-%s %sfor %s.\n", 1316 DEBUGSERVER_PROGRAM_NAME, 1317 DEBUGSERVER_VERSION_STR, 1318 compile_options.c_str(), 1319 RNB_ARCH); 1320 1321 std::string host; 1322 int port = INT32_MAX; 1323 char str[PATH_MAX]; 1324 str[0] = '\0'; 1325 1326 if (g_lockdown_opt == 0 && g_applist_opt == 0) 1327 { 1328 // Make sure we at least have port 1329 if (argc < 1) 1330 { 1331 show_usage_and_exit (1); 1332 } 1333 // accept 'localhost:' prefix on port number 1334 1335 int items_scanned = ::sscanf (argv[0], "%[^:]:%i", str, &port); 1336 if (items_scanned == 2) 1337 { 1338 host = str; 1339 DNBLogDebug("host = '%s' port = %i", host.c_str(), port); 1340 } 1341 else 1342 { 1343 // No hostname means "localhost" 1344 int items_scanned = ::sscanf (argv[0], "%i", &port); 1345 if (items_scanned == 1) 1346 { 1347 host = "127.0.0.1"; 1348 DNBLogDebug("host = '%s' port = %i", host.c_str(), port); 1349 } 1350 else if (argv[0][0] == '/') 1351 { 1352 port = INT32_MAX; 1353 strncpy(str, argv[0], sizeof(str)); 1354 } 1355 else 1356 { 1357 show_usage_and_exit (2); 1358 } 1359 } 1360 1361 // We just used the 'host:port' or the '/path/file' arg... 1362 argc--; 1363 argv++; 1364 1365 } 1366 1367 // If we know we're waiting to attach, we don't need any of this other info. 1368 if (start_mode != eRNBRunLoopModeInferiorAttaching && 1369 start_mode != eRNBRunLoopModePlatformMode) 1370 { 1371 if (argc == 0 || g_lockdown_opt) 1372 { 1373 if (g_lockdown_opt != 0) 1374 { 1375 // Work around for SIGPIPE crashes due to posix_spawn issue. 1376 // We have to close STDOUT and STDERR, else the first time we 1377 // try and do any, we get SIGPIPE and die as posix_spawn is 1378 // doing bad things with our file descriptors at the moment. 1379 int null = open("/dev/null", O_RDWR); 1380 dup2(null, STDOUT_FILENO); 1381 dup2(null, STDERR_FILENO); 1382 } 1383 else if (g_applist_opt != 0) 1384 { 1385 // List all applications we are able to see 1386 std::string applist_plist; 1387 int err = ListApplications(applist_plist, false, false); 1388 if (err == 0) 1389 { 1390 fputs (applist_plist.c_str(), stdout); 1391 } 1392 else 1393 { 1394 RNBLogSTDERR ("error: ListApplications returned error %i\n", err); 1395 } 1396 // Exit with appropriate error if we were asked to list the applications 1397 // with no other args were given (and we weren't trying to do this over 1398 // lockdown) 1399 return err; 1400 } 1401 1402 DNBLogDebug("Get args from remote protocol..."); 1403 start_mode = eRNBRunLoopModeGetStartModeFromRemoteProtocol; 1404 } 1405 else 1406 { 1407 start_mode = eRNBRunLoopModeInferiorLaunching; 1408 // Fill in the argv array in the context from the rest of our args. 1409 // Skip the name of this executable and the port number 1410 for (int i = 0; i < argc; i++) 1411 { 1412 DNBLogDebug("inferior_argv[%i] = '%s'", i, argv[i]); 1413 ctx.PushArgument (argv[i]); 1414 } 1415 } 1416 } 1417 1418 if (start_mode == eRNBRunLoopModeExit) 1419 return -1; 1420 1421 RNBRunLoopMode mode = start_mode; 1422 char err_str[1024] = {'\0'}; 1423 1424 while (mode != eRNBRunLoopModeExit) 1425 { 1426 switch (mode) 1427 { 1428 case eRNBRunLoopModeGetStartModeFromRemoteProtocol: 1429 #ifdef WITH_LOCKDOWN 1430 if (g_lockdown_opt) 1431 { 1432 if (!remote->Comm().IsConnected()) 1433 { 1434 if (remote->Comm().ConnectToService () != rnb_success) 1435 { 1436 RNBLogSTDERR ("Failed to get connection from a remote gdb process.\n"); 1437 mode = eRNBRunLoopModeExit; 1438 } 1439 else if (g_applist_opt != 0) 1440 { 1441 // List all applications we are able to see 1442 std::string applist_plist; 1443 if (ListApplications(applist_plist, false, false) == 0) 1444 { 1445 DNBLogDebug("Task list: %s", applist_plist.c_str()); 1446 1447 remote->Comm().Write(applist_plist.c_str(), applist_plist.size()); 1448 // Issue a read that will never yield any data until the other side 1449 // closes the socket so this process doesn't just exit and cause the 1450 // socket to close prematurely on the other end and cause data loss. 1451 std::string buf; 1452 remote->Comm().Read(buf); 1453 } 1454 remote->Comm().Disconnect(false); 1455 mode = eRNBRunLoopModeExit; 1456 break; 1457 } 1458 else 1459 { 1460 // Start watching for remote packets 1461 remote->StartReadRemoteDataThread(); 1462 } 1463 } 1464 } 1465 else 1466 #endif 1467 if (port != INT32_MAX) 1468 { 1469 if (!ConnectRemote (remote, host.c_str(), port, reverse_connect, named_pipe_path.c_str(), unix_socket_name.c_str())) 1470 mode = eRNBRunLoopModeExit; 1471 } 1472 else if (str[0] == '/') 1473 { 1474 if (remote->Comm().OpenFile (str)) 1475 mode = eRNBRunLoopModeExit; 1476 } 1477 1478 if (mode != eRNBRunLoopModeExit) 1479 { 1480 RNBLogSTDOUT ("Got a connection, waiting for process information for launching or attaching.\n"); 1481 1482 mode = RNBRunLoopGetStartModeFromRemote (remote); 1483 } 1484 break; 1485 1486 case eRNBRunLoopModeInferiorAttaching: 1487 if (!waitfor_pid_name.empty()) 1488 { 1489 // Set our end wait time if we are using a waitfor-duration 1490 // option that may have been specified 1491 struct timespec attach_timeout_abstime, *timeout_ptr = NULL; 1492 if (waitfor_duration != 0) 1493 { 1494 DNBTimer::OffsetTimeOfDay(&attach_timeout_abstime, waitfor_duration, 0); 1495 timeout_ptr = &attach_timeout_abstime; 1496 } 1497 nub_launch_flavor_t launch_flavor = g_launch_flavor; 1498 if (launch_flavor == eLaunchFlavorDefault) 1499 { 1500 // Our default launch method is posix spawn 1501 launch_flavor = eLaunchFlavorPosixSpawn; 1502 1503 #if defined WITH_FBS 1504 // Check if we have an app bundle, if so launch using SpringBoard. 1505 if (waitfor_pid_name.find (".app") != std::string::npos) 1506 { 1507 launch_flavor = eLaunchFlavorFBS; 1508 } 1509 #elif defined WITH_BKS 1510 // Check if we have an app bundle, if so launch using SpringBoard. 1511 if (waitfor_pid_name.find (".app") != std::string::npos) 1512 { 1513 launch_flavor = eLaunchFlavorBKS; 1514 } 1515 #elif defined WITH_SPRINGBOARD 1516 // Check if we have an app bundle, if so launch using SpringBoard. 1517 if (waitfor_pid_name.find (".app") != std::string::npos) 1518 { 1519 launch_flavor = eLaunchFlavorSpringBoard; 1520 } 1521 #endif 1522 } 1523 1524 ctx.SetLaunchFlavor(launch_flavor); 1525 bool ignore_existing = false; 1526 RNBLogSTDOUT ("Waiting to attach to process %s...\n", waitfor_pid_name.c_str()); 1527 nub_process_t pid = DNBProcessAttachWait (waitfor_pid_name.c_str(), launch_flavor, ignore_existing, timeout_ptr, waitfor_interval, err_str, sizeof(err_str)); 1528 g_pid = pid; 1529 1530 if (pid == INVALID_NUB_PROCESS) 1531 { 1532 ctx.LaunchStatus().SetError(-1, DNBError::Generic); 1533 if (err_str[0]) 1534 ctx.LaunchStatus().SetErrorString(err_str); 1535 RNBLogSTDERR ("error: failed to attach to process named: \"%s\" %s\n", waitfor_pid_name.c_str(), err_str); 1536 mode = eRNBRunLoopModeExit; 1537 } 1538 else 1539 { 1540 ctx.SetProcessID(pid); 1541 mode = eRNBRunLoopModeInferiorExecuting; 1542 } 1543 } 1544 else if (attach_pid != INVALID_NUB_PROCESS) 1545 { 1546 1547 RNBLogSTDOUT ("Attaching to process %i...\n", attach_pid); 1548 nub_process_t attached_pid; 1549 mode = RNBRunLoopLaunchAttaching (remote, attach_pid, attached_pid); 1550 if (mode != eRNBRunLoopModeInferiorExecuting) 1551 { 1552 const char *error_str = remote->Context().LaunchStatus().AsString(); 1553 RNBLogSTDERR ("error: failed to attach process %i: %s\n", attach_pid, error_str ? error_str : "unknown error."); 1554 mode = eRNBRunLoopModeExit; 1555 } 1556 } 1557 else if (!attach_pid_name.empty ()) 1558 { 1559 struct timespec attach_timeout_abstime, *timeout_ptr = NULL; 1560 if (waitfor_duration != 0) 1561 { 1562 DNBTimer::OffsetTimeOfDay(&attach_timeout_abstime, waitfor_duration, 0); 1563 timeout_ptr = &attach_timeout_abstime; 1564 } 1565 1566 RNBLogSTDOUT ("Attaching to process %s...\n", attach_pid_name.c_str()); 1567 nub_process_t pid = DNBProcessAttachByName (attach_pid_name.c_str(), timeout_ptr, err_str, sizeof(err_str)); 1568 g_pid = pid; 1569 if (pid == INVALID_NUB_PROCESS) 1570 { 1571 ctx.LaunchStatus().SetError(-1, DNBError::Generic); 1572 if (err_str[0]) 1573 ctx.LaunchStatus().SetErrorString(err_str); 1574 RNBLogSTDERR ("error: failed to attach to process named: \"%s\" %s\n", waitfor_pid_name.c_str(), err_str); 1575 mode = eRNBRunLoopModeExit; 1576 } 1577 else 1578 { 1579 ctx.SetProcessID(pid); 1580 mode = eRNBRunLoopModeInferiorExecuting; 1581 } 1582 1583 } 1584 else 1585 { 1586 RNBLogSTDERR ("error: asked to attach with empty name and invalid PID.\n"); 1587 mode = eRNBRunLoopModeExit; 1588 } 1589 1590 if (mode != eRNBRunLoopModeExit) 1591 { 1592 if (port != INT32_MAX) 1593 { 1594 if (!ConnectRemote (remote, host.c_str(), port, reverse_connect, named_pipe_path.c_str(), unix_socket_name.c_str())) 1595 mode = eRNBRunLoopModeExit; 1596 } 1597 else if (str[0] == '/') 1598 { 1599 if (remote->Comm().OpenFile (str)) 1600 mode = eRNBRunLoopModeExit; 1601 } 1602 if (mode != eRNBRunLoopModeExit) 1603 RNBLogSTDOUT ("Waiting for debugger instructions for process %d.\n", attach_pid); 1604 } 1605 break; 1606 1607 case eRNBRunLoopModeInferiorLaunching: 1608 { 1609 mode = RNBRunLoopLaunchInferior (remote, 1610 ctx.GetSTDINPath(), 1611 ctx.GetSTDOUTPath(), 1612 ctx.GetSTDERRPath(), 1613 no_stdio); 1614 1615 if (mode == eRNBRunLoopModeInferiorExecuting) 1616 { 1617 if (port != INT32_MAX) 1618 { 1619 if (!ConnectRemote (remote, host.c_str(), port, reverse_connect, named_pipe_path.c_str(), unix_socket_name.c_str())) 1620 mode = eRNBRunLoopModeExit; 1621 } 1622 else if (str[0] == '/') 1623 { 1624 if (remote->Comm().OpenFile (str)) 1625 mode = eRNBRunLoopModeExit; 1626 } 1627 1628 if (mode != eRNBRunLoopModeExit) 1629 { 1630 const char *proc_name = "<unknown>"; 1631 if (ctx.ArgumentCount() > 0) 1632 proc_name = ctx.ArgumentAtIndex(0); 1633 RNBLogSTDOUT ("Got a connection, launched process %s (pid = %d).\n", proc_name, ctx.ProcessID()); 1634 } 1635 } 1636 else 1637 { 1638 const char *error_str = remote->Context().LaunchStatus().AsString(); 1639 RNBLogSTDERR ("error: failed to launch process %s: %s\n", argv_sub_zero, error_str ? error_str : "unknown error."); 1640 } 1641 } 1642 break; 1643 1644 case eRNBRunLoopModeInferiorExecuting: 1645 mode = RNBRunLoopInferiorExecuting(remote); 1646 break; 1647 1648 case eRNBRunLoopModePlatformMode: 1649 if (port != INT32_MAX) 1650 { 1651 if (!ConnectRemote (remote, host.c_str(), port, reverse_connect, named_pipe_path.c_str(), unix_socket_name.c_str())) 1652 mode = eRNBRunLoopModeExit; 1653 } 1654 else if (str[0] == '/') 1655 { 1656 if (remote->Comm().OpenFile (str)) 1657 mode = eRNBRunLoopModeExit; 1658 } 1659 1660 if (mode != eRNBRunLoopModeExit) 1661 mode = RNBRunLoopPlatform (remote); 1662 break; 1663 1664 default: 1665 mode = eRNBRunLoopModeExit; 1666 case eRNBRunLoopModeExit: 1667 break; 1668 } 1669 } 1670 1671 remote->StopReadRemoteDataThread (); 1672 remote->Context().SetProcessID(INVALID_NUB_PROCESS); 1673 RNBLogSTDOUT ("Exiting.\n"); 1674 1675 return 0; 1676 } 1677