MachProcess.cpp revision 559cf6e8b52b940f5f4362b32d628838d6301e2e
1//===-- MachProcess.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// Created by Greg Clayton on 6/15/07. 11// 12//===----------------------------------------------------------------------===// 13 14#include "DNB.h" 15#include <mach/mach.h> 16#include <signal.h> 17#include <spawn.h> 18#include <sys/fcntl.h> 19#include <sys/types.h> 20#include <sys/ptrace.h> 21#include <sys/stat.h> 22#include <sys/sysctl.h> 23#include <unistd.h> 24#include "MacOSX/CFUtils.h" 25#include "SysSignal.h" 26 27#include <algorithm> 28#include <map> 29 30#include "DNBDataRef.h" 31#include "DNBLog.h" 32#include "DNBThreadResumeActions.h" 33#include "DNBTimer.h" 34#include "MachProcess.h" 35#include "PseudoTerminal.h" 36 37#include "CFBundle.h" 38#include "CFData.h" 39#include "CFString.h" 40 41static CFStringRef CopyBundleIDForPath (const char *app_buncle_path, DNBError &err_str); 42 43#ifdef WITH_SPRINGBOARD 44 45#include <CoreFoundation/CoreFoundation.h> 46#include <SpringBoardServices/SpringBoardServer.h> 47#include <SpringBoardServices/SBSWatchdogAssertion.h> 48 49static bool 50IsSBProcess (nub_process_t pid) 51{ 52 CFReleaser<CFArrayRef> appIdsForPID (::SBSCopyDisplayIdentifiersForProcessID(pid)); 53 return appIdsForPID.get() != NULL; 54} 55 56#endif 57 58#if 0 59#define DEBUG_LOG(fmt, ...) printf(fmt, ## __VA_ARGS__) 60#else 61#define DEBUG_LOG(fmt, ...) 62#endif 63 64#ifndef MACH_PROCESS_USE_POSIX_SPAWN 65#define MACH_PROCESS_USE_POSIX_SPAWN 1 66#endif 67 68#ifndef _POSIX_SPAWN_DISABLE_ASLR 69#define _POSIX_SPAWN_DISABLE_ASLR 0x0100 70#endif 71 72MachProcess::MachProcess() : 73 m_pid (0), 74 m_cpu_type (0), 75 m_child_stdin (-1), 76 m_child_stdout (-1), 77 m_child_stderr (-1), 78 m_path (), 79 m_args (), 80 m_task (this), 81 m_flags (eMachProcessFlagsNone), 82 m_stdio_thread (0), 83 m_stdio_mutex (PTHREAD_MUTEX_RECURSIVE), 84 m_stdout_data (), 85 m_thread_actions (), 86 m_profile_enabled (false), 87 m_profile_interval_usec (0), 88 m_profile_thread (0), 89 m_profile_data_mutex(PTHREAD_MUTEX_RECURSIVE), 90 m_profile_data (), 91 m_thread_list (), 92 m_exception_messages (), 93 m_exception_messages_mutex (PTHREAD_MUTEX_RECURSIVE), 94 m_state (eStateUnloaded), 95 m_state_mutex (PTHREAD_MUTEX_RECURSIVE), 96 m_events (0, kAllEventsMask), 97 m_breakpoints (), 98 m_watchpoints (), 99 m_name_to_addr_callback(NULL), 100 m_name_to_addr_baton(NULL), 101 m_image_infos_callback(NULL), 102 m_image_infos_baton(NULL) 103{ 104 DNBLogThreadedIf(LOG_PROCESS | LOG_VERBOSE, "%s", __PRETTY_FUNCTION__); 105} 106 107MachProcess::~MachProcess() 108{ 109 DNBLogThreadedIf(LOG_PROCESS | LOG_VERBOSE, "%s", __PRETTY_FUNCTION__); 110 Clear(); 111} 112 113pid_t 114MachProcess::SetProcessID(pid_t pid) 115{ 116 // Free any previous process specific data or resources 117 Clear(); 118 // Set the current PID appropriately 119 if (pid == 0) 120 m_pid = ::getpid (); 121 else 122 m_pid = pid; 123 return m_pid; // Return actualy PID in case a zero pid was passed in 124} 125 126nub_state_t 127MachProcess::GetState() 128{ 129 // If any other threads access this we will need a mutex for it 130 PTHREAD_MUTEX_LOCKER(locker, m_state_mutex); 131 return m_state; 132} 133 134const char * 135MachProcess::ThreadGetName(nub_thread_t tid) 136{ 137 return m_thread_list.GetName(tid); 138} 139 140nub_state_t 141MachProcess::ThreadGetState(nub_thread_t tid) 142{ 143 return m_thread_list.GetState(tid); 144} 145 146 147nub_size_t 148MachProcess::GetNumThreads () const 149{ 150 return m_thread_list.NumThreads(); 151} 152 153nub_thread_t 154MachProcess::GetThreadAtIndex (nub_size_t thread_idx) const 155{ 156 return m_thread_list.ThreadIDAtIndex(thread_idx); 157} 158 159nub_bool_t 160MachProcess::SyncThreadState (nub_thread_t tid) 161{ 162 MachThreadSP thread_sp(m_thread_list.GetThreadByID(tid)); 163 if (!thread_sp) 164 return false; 165 kern_return_t kret = ::thread_abort_safely(thread_sp->ThreadID()); 166 DNBLogThreadedIf (LOG_THREAD, "thread = 0x%4.4x calling thread_abort_safely (tid) => %u (GetGPRState() for stop_count = %u)", thread_sp->ThreadID(), kret, thread_sp->Process()->StopCount()); 167 168 if (kret == KERN_SUCCESS) 169 return true; 170 else 171 return false; 172 173} 174 175nub_thread_t 176MachProcess::GetCurrentThread () 177{ 178 return m_thread_list.CurrentThreadID(); 179} 180 181nub_thread_t 182MachProcess::SetCurrentThread(nub_thread_t tid) 183{ 184 return m_thread_list.SetCurrentThread(tid); 185} 186 187bool 188MachProcess::GetThreadStoppedReason(nub_thread_t tid, struct DNBThreadStopInfo *stop_info) const 189{ 190 return m_thread_list.GetThreadStoppedReason(tid, stop_info); 191} 192 193void 194MachProcess::DumpThreadStoppedReason(nub_thread_t tid) const 195{ 196 return m_thread_list.DumpThreadStoppedReason(tid); 197} 198 199const char * 200MachProcess::GetThreadInfo(nub_thread_t tid) const 201{ 202 return m_thread_list.GetThreadInfo(tid); 203} 204 205uint32_t 206MachProcess::GetCPUType () 207{ 208 if (m_cpu_type == 0 && m_pid != 0) 209 m_cpu_type = MachProcess::GetCPUTypeForLocalProcess (m_pid); 210 return m_cpu_type; 211} 212 213const DNBRegisterSetInfo * 214MachProcess::GetRegisterSetInfo (nub_thread_t tid, nub_size_t *num_reg_sets) const 215{ 216 MachThreadSP thread_sp (m_thread_list.GetThreadByID (tid)); 217 if (thread_sp) 218 { 219 DNBArchProtocol *arch = thread_sp->GetArchProtocol(); 220 if (arch) 221 return arch->GetRegisterSetInfo (num_reg_sets); 222 } 223 *num_reg_sets = 0; 224 return NULL; 225} 226 227bool 228MachProcess::GetRegisterValue ( nub_thread_t tid, uint32_t set, uint32_t reg, DNBRegisterValue *value ) const 229{ 230 return m_thread_list.GetRegisterValue(tid, set, reg, value); 231} 232 233bool 234MachProcess::SetRegisterValue ( nub_thread_t tid, uint32_t set, uint32_t reg, const DNBRegisterValue *value ) const 235{ 236 return m_thread_list.SetRegisterValue(tid, set, reg, value); 237} 238 239void 240MachProcess::SetState(nub_state_t new_state) 241{ 242 // If any other threads access this we will need a mutex for it 243 uint32_t event_mask = 0; 244 245 // Scope for mutex locker 246 { 247 PTHREAD_MUTEX_LOCKER(locker, m_state_mutex); 248 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::SetState ( %s )", DNBStateAsString(new_state)); 249 250 const nub_state_t old_state = m_state; 251 252 if (old_state != new_state) 253 { 254 if (NUB_STATE_IS_STOPPED(new_state)) 255 event_mask = eEventProcessStoppedStateChanged; 256 else 257 event_mask = eEventProcessRunningStateChanged; 258 259 m_state = new_state; 260 if (new_state == eStateStopped) 261 m_stop_count++; 262 } 263 } 264 265 if (event_mask != 0) 266 { 267 m_events.SetEvents (event_mask); 268 269 // Wait for the event bit to reset if a reset ACK is requested 270 m_events.WaitForResetAck(event_mask); 271 } 272 273} 274 275void 276MachProcess::Clear() 277{ 278 // Clear any cached thread list while the pid and task are still valid 279 280 m_task.Clear(); 281 // Now clear out all member variables 282 m_pid = INVALID_NUB_PROCESS; 283 CloseChildFileDescriptors(); 284 m_path.clear(); 285 m_args.clear(); 286 SetState(eStateUnloaded); 287 m_flags = eMachProcessFlagsNone; 288 m_stop_count = 0; 289 m_thread_list.Clear(); 290 { 291 PTHREAD_MUTEX_LOCKER(locker, m_exception_messages_mutex); 292 m_exception_messages.clear(); 293 } 294 if (m_profile_thread) 295 { 296 pthread_join(m_profile_thread, NULL); 297 m_profile_thread = NULL; 298 } 299} 300 301 302bool 303MachProcess::StartSTDIOThread() 304{ 305 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s ( )", __FUNCTION__); 306 // Create the thread that watches for the child STDIO 307 return ::pthread_create (&m_stdio_thread, NULL, MachProcess::STDIOThread, this) == 0; 308} 309 310void 311MachProcess::SetAsyncEnableProfiling(bool enable, uint64_t interval_usec) 312{ 313 m_profile_enabled = enable; 314 m_profile_interval_usec = interval_usec; 315 316 if (m_profile_enabled && (m_profile_thread == 0)) 317 { 318 StartProfileThread(); 319 } 320} 321 322bool 323MachProcess::StartProfileThread() 324{ 325 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s ( )", __FUNCTION__); 326 // Create the thread that profiles the inferior and reports back if enabled 327 return ::pthread_create (&m_profile_thread, NULL, MachProcess::ProfileThread, this) == 0; 328} 329 330 331nub_addr_t 332MachProcess::LookupSymbol(const char *name, const char *shlib) 333{ 334 if (m_name_to_addr_callback != NULL && name && name[0]) 335 return m_name_to_addr_callback(ProcessID(), name, shlib, m_name_to_addr_baton); 336 return INVALID_NUB_ADDRESS; 337} 338 339bool 340MachProcess::Resume (const DNBThreadResumeActions& thread_actions) 341{ 342 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Resume ()"); 343 nub_state_t state = GetState(); 344 345 if (CanResume(state)) 346 { 347 m_thread_actions = thread_actions; 348 PrivateResume(); 349 return true; 350 } 351 else if (state == eStateRunning) 352 { 353 DNBLogThreadedIf(LOG_PROCESS, "Resume() - task 0x%x is running, ignoring...", m_task.TaskPort()); 354 return true; 355 } 356 DNBLogThreadedIf(LOG_PROCESS, "Resume() - task 0x%x can't continue, ignoring...", m_task.TaskPort()); 357 return false; 358} 359 360bool 361MachProcess::Kill (const struct timespec *timeout_abstime) 362{ 363 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Kill ()"); 364 nub_state_t state = DoSIGSTOP(true, false, NULL); 365 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Kill() DoSIGSTOP() state = %s", DNBStateAsString(state)); 366 errno = 0; 367 ::ptrace (PT_KILL, m_pid, 0, 0); 368 DNBError err; 369 err.SetErrorToErrno(); 370 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Kill() DoSIGSTOP() ::ptrace (PT_KILL, pid=%u, 0, 0) => 0x%8.8x (%s)", m_pid, err.Error(), err.AsString()); 371 m_thread_actions = DNBThreadResumeActions (eStateRunning, 0); 372 PrivateResume (); 373 return true; 374} 375 376bool 377MachProcess::Signal (int signal, const struct timespec *timeout_abstime) 378{ 379 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Signal (signal = %d, timeout = %p)", signal, timeout_abstime); 380 nub_state_t state = GetState(); 381 if (::kill (ProcessID(), signal) == 0) 382 { 383 // If we were running and we have a timeout, wait for the signal to stop 384 if (IsRunning(state) && timeout_abstime) 385 { 386 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Signal (signal = %d, timeout = %p) waiting for signal to stop process...", signal, timeout_abstime); 387 m_events.WaitForSetEvents(eEventProcessStoppedStateChanged, timeout_abstime); 388 state = GetState(); 389 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Signal (signal = %d, timeout = %p) state = %s", signal, timeout_abstime, DNBStateAsString(state)); 390 return !IsRunning (state); 391 } 392 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Signal (signal = %d, timeout = %p) not waiting...", signal, timeout_abstime); 393 return true; 394 } 395 DNBError err(errno, DNBError::POSIX); 396 err.LogThreadedIfError("kill (pid = %d, signo = %i)", ProcessID(), signal); 397 return false; 398 399} 400 401nub_state_t 402MachProcess::DoSIGSTOP (bool clear_bps_and_wps, bool allow_running, uint32_t *thread_idx_ptr) 403{ 404 nub_state_t state = GetState(); 405 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::DoSIGSTOP() state = %s", DNBStateAsString (state)); 406 407 if (!IsRunning(state)) 408 { 409 if (clear_bps_and_wps) 410 { 411 DisableAllBreakpoints (true); 412 DisableAllWatchpoints (true); 413 clear_bps_and_wps = false; 414 } 415 416 // If we already have a thread stopped due to a SIGSTOP, we don't have 417 // to do anything... 418 uint32_t thread_idx = m_thread_list.GetThreadIndexForThreadStoppedWithSignal (SIGSTOP); 419 if (thread_idx_ptr) 420 *thread_idx_ptr = thread_idx; 421 if (thread_idx != UINT32_MAX) 422 return GetState(); 423 424 // No threads were stopped with a SIGSTOP, we need to run and halt the 425 // process with a signal 426 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::DoSIGSTOP() state = %s -- resuming process", DNBStateAsString (state)); 427 if (allow_running) 428 m_thread_actions = DNBThreadResumeActions (eStateRunning, 0); 429 else 430 m_thread_actions = DNBThreadResumeActions (eStateSuspended, 0); 431 432 PrivateResume (); 433 434 // Reset the event that says we were indeed running 435 m_events.ResetEvents(eEventProcessRunningStateChanged); 436 state = GetState(); 437 } 438 439 // We need to be stopped in order to be able to detach, so we need 440 // to send ourselves a SIGSTOP 441 442 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::DoSIGSTOP() state = %s -- sending SIGSTOP", DNBStateAsString (state)); 443 struct timespec sigstop_timeout; 444 DNBTimer::OffsetTimeOfDay(&sigstop_timeout, 2, 0); 445 Signal (SIGSTOP, &sigstop_timeout); 446 if (clear_bps_and_wps) 447 { 448 DisableAllBreakpoints (true); 449 DisableAllWatchpoints (true); 450 //clear_bps_and_wps = false; 451 } 452 uint32_t thread_idx = m_thread_list.GetThreadIndexForThreadStoppedWithSignal (SIGSTOP); 453 if (thread_idx_ptr) 454 *thread_idx_ptr = thread_idx; 455 return GetState(); 456} 457 458bool 459MachProcess::Detach() 460{ 461 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Detach()"); 462 463 uint32_t thread_idx = UINT32_MAX; 464 nub_state_t state = DoSIGSTOP(true, true, &thread_idx); 465 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::Detach() DoSIGSTOP() returned %s", DNBStateAsString(state)); 466 467 { 468 m_thread_actions.Clear(); 469 DNBThreadResumeAction thread_action; 470 thread_action.tid = m_thread_list.ThreadIDAtIndex (thread_idx); 471 thread_action.state = eStateRunning; 472 thread_action.signal = -1; 473 thread_action.addr = INVALID_NUB_ADDRESS; 474 475 m_thread_actions.Append (thread_action); 476 m_thread_actions.SetDefaultThreadActionIfNeeded (eStateRunning, 0); 477 478 PTHREAD_MUTEX_LOCKER (locker, m_exception_messages_mutex); 479 480 ReplyToAllExceptions (); 481 482 } 483 484 m_task.ShutDownExcecptionThread(); 485 486 // Detach from our process 487 errno = 0; 488 nub_process_t pid = m_pid; 489 int ret = ::ptrace (PT_DETACH, pid, (caddr_t)1, 0); 490 DNBError err(errno, DNBError::POSIX); 491 if (DNBLogCheckLogBit(LOG_PROCESS) || err.Fail() || (ret != 0)) 492 err.LogThreaded("::ptrace (PT_DETACH, %u, (caddr_t)1, 0)", pid); 493 494 // Resume our task 495 m_task.Resume(); 496 497 // NULL our task out as we have already retored all exception ports 498 m_task.Clear(); 499 500 // Clear out any notion of the process we once were 501 Clear(); 502 503 SetState(eStateDetached); 504 505 return true; 506} 507 508nub_size_t 509MachProcess::RemoveTrapsFromBuffer (nub_addr_t addr, nub_size_t size, uint8_t *buf) const 510{ 511 nub_size_t bytes_removed = 0; 512 const DNBBreakpoint *bp; 513 nub_addr_t intersect_addr; 514 nub_size_t intersect_size; 515 nub_size_t opcode_offset; 516 nub_size_t idx; 517 for (idx = 0; (bp = m_breakpoints.GetByIndex(idx)) != NULL; ++idx) 518 { 519 if (bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset)) 520 { 521 assert(addr <= intersect_addr && intersect_addr < addr + size); 522 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 523 assert(opcode_offset + intersect_size <= bp->ByteSize()); 524 nub_size_t buf_offset = intersect_addr - addr; 525 ::memcpy(buf + buf_offset, bp->SavedOpcodeBytes() + opcode_offset, intersect_size); 526 } 527 } 528 return bytes_removed; 529} 530 531//---------------------------------------------------------------------- 532// ReadMemory from the MachProcess level will always remove any software 533// breakpoints from the memory buffer before returning. If you wish to 534// read memory and see those traps, read from the MachTask 535// (m_task.ReadMemory()) as that version will give you what is actually 536// in inferior memory. 537//---------------------------------------------------------------------- 538nub_size_t 539MachProcess::ReadMemory (nub_addr_t addr, nub_size_t size, void *buf) 540{ 541 // We need to remove any current software traps (enabled software 542 // breakpoints) that we may have placed in our tasks memory. 543 544 // First just read the memory as is 545 nub_size_t bytes_read = m_task.ReadMemory(addr, size, buf); 546 547 // Then place any opcodes that fall into this range back into the buffer 548 // before we return this to callers. 549 if (bytes_read > 0) 550 RemoveTrapsFromBuffer (addr, size, (uint8_t *)buf); 551 return bytes_read; 552} 553 554//---------------------------------------------------------------------- 555// WriteMemory from the MachProcess level will always write memory around 556// any software breakpoints. Any software breakpoints will have their 557// opcodes modified if they are enabled. Any memory that doesn't overlap 558// with software breakpoints will be written to. If you wish to write to 559// inferior memory without this interference, then write to the MachTask 560// (m_task.WriteMemory()) as that version will always modify inferior 561// memory. 562//---------------------------------------------------------------------- 563nub_size_t 564MachProcess::WriteMemory (nub_addr_t addr, nub_size_t size, const void *buf) 565{ 566 // We need to write any data that would go where any current software traps 567 // (enabled software breakpoints) any software traps (breakpoints) that we 568 // may have placed in our tasks memory. 569 570 std::map<nub_addr_t, DNBBreakpoint *> addr_to_bp_map; 571 DNBBreakpoint *bp; 572 nub_size_t idx; 573 for (idx = 0; (bp = m_breakpoints.GetByIndex(idx)) != NULL; ++idx) 574 { 575 if (bp->IntersectsRange(addr, size, NULL, NULL, NULL)) 576 addr_to_bp_map[bp->Address()] = bp; 577 } 578 579 // If we don't have any software breakpoints that are in this buffer, then 580 // we can just write memory and be done with it. 581 if (addr_to_bp_map.empty()) 582 return m_task.WriteMemory(addr, size, buf); 583 584 // If we make it here, we have some breakpoints that overlap and we need 585 // to work around them. 586 587 nub_size_t bytes_written = 0; 588 nub_addr_t intersect_addr; 589 nub_size_t intersect_size; 590 nub_size_t opcode_offset; 591 const uint8_t *ubuf = (const uint8_t *)buf; 592 std::map<nub_addr_t, DNBBreakpoint *>::iterator pos, end = addr_to_bp_map.end(); 593 for (pos = addr_to_bp_map.begin(); pos != end; ++pos) 594 { 595 bp = pos->second; 596 597 assert(bp->IntersectsRange(addr, size, &intersect_addr, &intersect_size, &opcode_offset)); 598 assert(addr <= intersect_addr && intersect_addr < addr + size); 599 assert(addr < intersect_addr + intersect_size && intersect_addr + intersect_size <= addr + size); 600 assert(opcode_offset + intersect_size <= bp->ByteSize()); 601 602 // Check for bytes before this breakpoint 603 const nub_addr_t curr_addr = addr + bytes_written; 604 if (intersect_addr > curr_addr) 605 { 606 // There are some bytes before this breakpoint that we need to 607 // just write to memory 608 nub_size_t curr_size = intersect_addr - curr_addr; 609 nub_size_t curr_bytes_written = m_task.WriteMemory(curr_addr, curr_size, ubuf + bytes_written); 610 bytes_written += curr_bytes_written; 611 if (curr_bytes_written != curr_size) 612 { 613 // We weren't able to write all of the requested bytes, we 614 // are done looping and will return the number of bytes that 615 // we have written so far. 616 break; 617 } 618 } 619 620 // Now write any bytes that would cover up any software breakpoints 621 // directly into the breakpoint opcode buffer 622 ::memcpy(bp->SavedOpcodeBytes() + opcode_offset, ubuf + bytes_written, intersect_size); 623 bytes_written += intersect_size; 624 } 625 626 // Write any remaining bytes after the last breakpoint if we have any left 627 if (bytes_written < size) 628 bytes_written += m_task.WriteMemory(addr + bytes_written, size - bytes_written, ubuf + bytes_written); 629 630 return bytes_written; 631} 632 633void 634MachProcess::ReplyToAllExceptions () 635{ 636 PTHREAD_MUTEX_LOCKER(locker, m_exception_messages_mutex); 637 if (m_exception_messages.empty() == false) 638 { 639 MachException::Message::iterator pos; 640 MachException::Message::iterator begin = m_exception_messages.begin(); 641 MachException::Message::iterator end = m_exception_messages.end(); 642 for (pos = begin; pos != end; ++pos) 643 { 644 DNBLogThreadedIf(LOG_EXCEPTIONS, "Replying to exception %u...", (uint32_t)std::distance(begin, pos)); 645 int thread_reply_signal = 0; 646 647 const DNBThreadResumeAction *action = m_thread_actions.GetActionForThread (pos->state.thread_port, false); 648 649 if (action) 650 { 651 thread_reply_signal = action->signal; 652 if (thread_reply_signal) 653 m_thread_actions.SetSignalHandledForThread (pos->state.thread_port); 654 } 655 656 DNBError err (pos->Reply(this, thread_reply_signal)); 657 if (DNBLogCheckLogBit(LOG_EXCEPTIONS)) 658 err.LogThreadedIfError("Error replying to exception"); 659 } 660 661 // Erase all exception message as we should have used and replied 662 // to them all already. 663 m_exception_messages.clear(); 664 } 665} 666void 667MachProcess::PrivateResume () 668{ 669 PTHREAD_MUTEX_LOCKER (locker, m_exception_messages_mutex); 670 671 ReplyToAllExceptions (); 672// bool stepOverBreakInstruction = step; 673 674 // Let the thread prepare to resume and see if any threads want us to 675 // step over a breakpoint instruction (ProcessWillResume will modify 676 // the value of stepOverBreakInstruction). 677 m_thread_list.ProcessWillResume (this, m_thread_actions); 678 679 // Set our state accordingly 680 if (m_thread_actions.NumActionsWithState(eStateStepping)) 681 SetState (eStateStepping); 682 else 683 SetState (eStateRunning); 684 685 // Now resume our task. 686 m_task.Resume(); 687} 688 689nub_break_t 690MachProcess::CreateBreakpoint(nub_addr_t addr, nub_size_t length, bool hardware, thread_t tid) 691{ 692 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::CreateBreakpoint ( addr = 0x%8.8llx, length = %llu, hardware = %i, tid = 0x%4.4x )", (uint64_t)addr, (uint64_t)length, hardware, tid); 693 if (hardware && tid == INVALID_NUB_THREAD) 694 tid = GetCurrentThread(); 695 696 DNBBreakpoint bp(addr, length, tid, hardware); 697 nub_break_t breakID = m_breakpoints.Add(bp); 698 if (EnableBreakpoint(breakID)) 699 { 700 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::CreateBreakpoint ( addr = 0x%8.8llx, length = %llu, tid = 0x%4.4x ) => %u", (uint64_t)addr, (uint64_t)length, tid, breakID); 701 return breakID; 702 } 703 else 704 { 705 m_breakpoints.Remove(breakID); 706 } 707 // We failed to enable the breakpoint 708 return INVALID_NUB_BREAK_ID; 709} 710 711nub_watch_t 712MachProcess::CreateWatchpoint(nub_addr_t addr, nub_size_t length, uint32_t watch_flags, bool hardware, thread_t tid) 713{ 714 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::CreateWatchpoint ( addr = 0x%8.8llx, length = %llu, flags = 0x%8.8x, hardware = %i, tid = 0x%4.4x )", (uint64_t)addr, (uint64_t)length, watch_flags, hardware, tid); 715 if (hardware && tid == INVALID_NUB_THREAD) 716 tid = GetCurrentThread(); 717 718 DNBBreakpoint watch(addr, length, tid, hardware); 719 watch.SetIsWatchpoint(watch_flags); 720 721 nub_watch_t watchID = m_watchpoints.Add(watch); 722 if (EnableWatchpoint(watchID)) 723 { 724 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::CreateWatchpoint ( addr = 0x%8.8llx, length = %llu, tid = 0x%x) => %u", (uint64_t)addr, (uint64_t)length, tid, watchID); 725 return watchID; 726 } 727 else 728 { 729 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::CreateWatchpoint ( addr = 0x%8.8llx, length = %llu, tid = 0x%x) => FAILED (%u)", (uint64_t)addr, (uint64_t)length, tid, watchID); 730 m_watchpoints.Remove(watchID); 731 } 732 // We failed to enable the watchpoint 733 return INVALID_NUB_BREAK_ID; 734} 735 736nub_size_t 737MachProcess::DisableAllBreakpoints(bool remove) 738{ 739 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::%s (remove = %d )", __FUNCTION__, remove); 740 DNBBreakpoint *bp; 741 nub_size_t disabled_count = 0; 742 nub_size_t idx = 0; 743 while ((bp = m_breakpoints.GetByIndex(idx)) != NULL) 744 { 745 bool success = DisableBreakpoint(bp->GetID(), remove); 746 747 if (success) 748 disabled_count++; 749 // If we failed to disable the breakpoint or we aren't removing the breakpoint 750 // increment the breakpoint index. Otherwise DisableBreakpoint will have removed 751 // the breakpoint at this index and we don't need to change it. 752 if ((success == false) || (remove == false)) 753 idx++; 754 } 755 return disabled_count; 756} 757 758nub_size_t 759MachProcess::DisableAllWatchpoints(bool remove) 760{ 761 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::%s (remove = %d )", __FUNCTION__, remove); 762 DNBBreakpoint *wp; 763 nub_size_t disabled_count = 0; 764 nub_size_t idx = 0; 765 while ((wp = m_watchpoints.GetByIndex(idx)) != NULL) 766 { 767 bool success = DisableWatchpoint(wp->GetID(), remove); 768 769 if (success) 770 disabled_count++; 771 // If we failed to disable the watchpoint or we aren't removing the watchpoint 772 // increment the watchpoint index. Otherwise DisableWatchpoint will have removed 773 // the watchpoint at this index and we don't need to change it. 774 if ((success == false) || (remove == false)) 775 idx++; 776 } 777 return disabled_count; 778} 779 780bool 781MachProcess::DisableBreakpoint(nub_break_t breakID, bool remove) 782{ 783 DNBBreakpoint *bp = m_breakpoints.FindByID (breakID); 784 if (bp) 785 { 786 nub_addr_t addr = bp->Address(); 787 DNBLogThreadedIf(LOG_BREAKPOINTS | LOG_VERBOSE, "MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx", breakID, remove, (uint64_t)addr); 788 789 if (bp->IsHardware()) 790 { 791 bool hw_disable_result = m_thread_list.DisableHardwareBreakpoint (bp); 792 793 if (hw_disable_result == true) 794 { 795 bp->SetEnabled(false); 796 // Let the thread list know that a breakpoint has been modified 797 if (remove) 798 { 799 m_thread_list.NotifyBreakpointChanged(bp); 800 m_breakpoints.Remove(breakID); 801 } 802 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx (hardware) => success", breakID, remove, (uint64_t)addr); 803 return true; 804 } 805 806 return false; 807 } 808 809 const nub_size_t break_op_size = bp->ByteSize(); 810 assert (break_op_size > 0); 811 const uint8_t * const break_op = DNBArchProtocol::GetBreakpointOpcode (bp->ByteSize()); 812 if (break_op_size > 0) 813 { 814 // Clear a software breakoint instruction 815 uint8_t curr_break_op[break_op_size]; 816 bool break_op_found = false; 817 818 // Read the breakpoint opcode 819 if (m_task.ReadMemory(addr, break_op_size, curr_break_op) == break_op_size) 820 { 821 bool verify = false; 822 if (bp->IsEnabled()) 823 { 824 // Make sure we have the a breakpoint opcode exists at this address 825 if (memcmp(curr_break_op, break_op, break_op_size) == 0) 826 { 827 break_op_found = true; 828 // We found a valid breakpoint opcode at this address, now restore 829 // the saved opcode. 830 if (m_task.WriteMemory(addr, break_op_size, bp->SavedOpcodeBytes()) == break_op_size) 831 { 832 verify = true; 833 } 834 else 835 { 836 DNBLogError("MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx memory write failed when restoring original opcode", breakID, remove, (uint64_t)addr); 837 } 838 } 839 else 840 { 841 DNBLogWarning("MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx expected a breakpoint opcode but didn't find one.", breakID, remove, (uint64_t)addr); 842 // Set verify to true and so we can check if the original opcode has already been restored 843 verify = true; 844 } 845 } 846 else 847 { 848 DNBLogThreadedIf(LOG_BREAKPOINTS | LOG_VERBOSE, "MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx is not enabled", breakID, remove, (uint64_t)addr); 849 // Set verify to true and so we can check if the original opcode is there 850 verify = true; 851 } 852 853 if (verify) 854 { 855 uint8_t verify_opcode[break_op_size]; 856 // Verify that our original opcode made it back to the inferior 857 if (m_task.ReadMemory(addr, break_op_size, verify_opcode) == break_op_size) 858 { 859 // compare the memory we just read with the original opcode 860 if (memcmp(bp->SavedOpcodeBytes(), verify_opcode, break_op_size) == 0) 861 { 862 // SUCCESS 863 bp->SetEnabled(false); 864 // Let the thread list know that a breakpoint has been modified 865 if (remove) 866 { 867 m_thread_list.NotifyBreakpointChanged(bp); 868 m_breakpoints.Remove(breakID); 869 } 870 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx => success", breakID, remove, (uint64_t)addr); 871 return true; 872 } 873 else 874 { 875 if (break_op_found) 876 DNBLogError("MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx: failed to restore original opcode", breakID, remove, (uint64_t)addr); 877 else 878 DNBLogError("MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) addr = 0x%8.8llx: opcode changed", breakID, remove, (uint64_t)addr); 879 } 880 } 881 else 882 { 883 DNBLogWarning("MachProcess::DisableBreakpoint: unable to disable breakpoint 0x%8.8llx", (uint64_t)addr); 884 } 885 } 886 } 887 else 888 { 889 DNBLogWarning("MachProcess::DisableBreakpoint: unable to read memory at 0x%8.8llx", (uint64_t)addr); 890 } 891 } 892 } 893 else 894 { 895 DNBLogError("MachProcess::DisableBreakpoint ( breakID = %d, remove = %d ) invalid breakpoint ID", breakID, remove); 896 } 897 return false; 898} 899 900bool 901MachProcess::DisableWatchpoint(nub_watch_t watchID, bool remove) 902{ 903 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::%s(watchID = %d, remove = %d)", __FUNCTION__, watchID, remove); 904 DNBBreakpoint *wp = m_watchpoints.FindByID (watchID); 905 if (wp) 906 { 907 nub_addr_t addr = wp->Address(); 908 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::DisableWatchpoint ( watchID = %d, remove = %d ) addr = 0x%8.8llx", watchID, remove, (uint64_t)addr); 909 910 if (wp->IsHardware()) 911 { 912 bool hw_disable_result = m_thread_list.DisableHardwareWatchpoint (wp); 913 914 if (hw_disable_result == true) 915 { 916 wp->SetEnabled(false); 917 if (remove) 918 m_watchpoints.Remove(watchID); 919 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::Disablewatchpoint ( watchID = %d, remove = %d ) addr = 0x%8.8llx (hardware) => success", watchID, remove, (uint64_t)addr); 920 return true; 921 } 922 } 923 924 // TODO: clear software watchpoints if we implement them 925 } 926 else 927 { 928 DNBLogError("MachProcess::DisableWatchpoint ( watchID = %d, remove = %d ) invalid watchpoint ID", watchID, remove); 929 } 930 return false; 931} 932 933 934void 935MachProcess::DumpBreakpoint(nub_break_t breakID) const 936{ 937 DNBLogThreaded("MachProcess::DumpBreakpoint(breakID = %d)", breakID); 938 939 if (NUB_BREAK_ID_IS_VALID(breakID)) 940 { 941 const DNBBreakpoint *bp = m_breakpoints.FindByID(breakID); 942 if (bp) 943 bp->Dump(); 944 else 945 DNBLog("MachProcess::DumpBreakpoint(breakID = %d): invalid breakID", breakID); 946 } 947 else 948 { 949 m_breakpoints.Dump(); 950 } 951} 952 953void 954MachProcess::DumpWatchpoint(nub_watch_t watchID) const 955{ 956 DNBLogThreaded("MachProcess::DumpWatchpoint(watchID = %d)", watchID); 957 958 if (NUB_BREAK_ID_IS_VALID(watchID)) 959 { 960 const DNBBreakpoint *wp = m_watchpoints.FindByID(watchID); 961 if (wp) 962 wp->Dump(); 963 else 964 DNBLog("MachProcess::DumpWatchpoint(watchID = %d): invalid watchID", watchID); 965 } 966 else 967 { 968 m_watchpoints.Dump(); 969 } 970} 971 972uint32_t 973MachProcess::GetNumSupportedHardwareWatchpoints () const 974{ 975 return m_thread_list.NumSupportedHardwareWatchpoints(); 976} 977 978bool 979MachProcess::EnableBreakpoint(nub_break_t breakID) 980{ 981 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::EnableBreakpoint ( breakID = %d )", breakID); 982 DNBBreakpoint *bp = m_breakpoints.FindByID (breakID); 983 if (bp) 984 { 985 nub_addr_t addr = bp->Address(); 986 if (bp->IsEnabled()) 987 { 988 DNBLogWarning("MachProcess::EnableBreakpoint ( breakID = %d ) addr = 0x%8.8llx: breakpoint already enabled.", breakID, (uint64_t)addr); 989 return true; 990 } 991 else 992 { 993 if (bp->HardwarePreferred()) 994 { 995 bp->SetHardwareIndex(m_thread_list.EnableHardwareBreakpoint(bp)); 996 if (bp->IsHardware()) 997 { 998 bp->SetEnabled(true); 999 return true; 1000 } 1001 } 1002 1003 const nub_size_t break_op_size = bp->ByteSize(); 1004 assert (break_op_size != 0); 1005 const uint8_t * const break_op = DNBArchProtocol::GetBreakpointOpcode (break_op_size); 1006 if (break_op_size > 0) 1007 { 1008 // Save the original opcode by reading it 1009 if (m_task.ReadMemory(addr, break_op_size, bp->SavedOpcodeBytes()) == break_op_size) 1010 { 1011 // Write a software breakpoint in place of the original opcode 1012 if (m_task.WriteMemory(addr, break_op_size, break_op) == break_op_size) 1013 { 1014 uint8_t verify_break_op[4]; 1015 if (m_task.ReadMemory(addr, break_op_size, verify_break_op) == break_op_size) 1016 { 1017 if (memcmp(break_op, verify_break_op, break_op_size) == 0) 1018 { 1019 bp->SetEnabled(true); 1020 // Let the thread list know that a breakpoint has been modified 1021 m_thread_list.NotifyBreakpointChanged(bp); 1022 DNBLogThreadedIf(LOG_BREAKPOINTS, "MachProcess::EnableBreakpoint ( breakID = %d ) addr = 0x%8.8llx: SUCCESS.", breakID, (uint64_t)addr); 1023 return true; 1024 } 1025 else 1026 { 1027 DNBLogError("MachProcess::EnableBreakpoint ( breakID = %d ) addr = 0x%8.8llx: breakpoint opcode verification failed.", breakID, (uint64_t)addr); 1028 } 1029 } 1030 else 1031 { 1032 DNBLogError("MachProcess::EnableBreakpoint ( breakID = %d ) addr = 0x%8.8llx: unable to read memory to verify breakpoint opcode.", breakID, (uint64_t)addr); 1033 } 1034 } 1035 else 1036 { 1037 DNBLogError("MachProcess::EnableBreakpoint ( breakID = %d ) addr = 0x%8.8llx: unable to write breakpoint opcode to memory.", breakID, (uint64_t)addr); 1038 } 1039 } 1040 else 1041 { 1042 DNBLogError("MachProcess::EnableBreakpoint ( breakID = %d ) addr = 0x%8.8llx: unable to read memory at breakpoint address.", breakID, (uint64_t)addr); 1043 } 1044 } 1045 else 1046 { 1047 DNBLogError("MachProcess::EnableBreakpoint ( breakID = %d ) no software breakpoint opcode for current architecture.", breakID); 1048 } 1049 } 1050 } 1051 return false; 1052} 1053 1054bool 1055MachProcess::EnableWatchpoint(nub_watch_t watchID) 1056{ 1057 DNBLogThreadedIf(LOG_WATCHPOINTS, "MachProcess::EnableWatchpoint(watchID = %d)", watchID); 1058 DNBBreakpoint *wp = m_watchpoints.FindByID (watchID); 1059 if (wp) 1060 { 1061 nub_addr_t addr = wp->Address(); 1062 if (wp->IsEnabled()) 1063 { 1064 DNBLogWarning("MachProcess::EnableWatchpoint(watchID = %d) addr = 0x%8.8llx: watchpoint already enabled.", watchID, (uint64_t)addr); 1065 return true; 1066 } 1067 else 1068 { 1069 // Currently only try and set hardware watchpoints. 1070 wp->SetHardwareIndex(m_thread_list.EnableHardwareWatchpoint(wp)); 1071 if (wp->IsHardware()) 1072 { 1073 wp->SetEnabled(true); 1074 return true; 1075 } 1076 // TODO: Add software watchpoints by doing page protection tricks. 1077 } 1078 } 1079 return false; 1080} 1081 1082// Called by the exception thread when an exception has been received from 1083// our process. The exception message is completely filled and the exception 1084// data has already been copied. 1085void 1086MachProcess::ExceptionMessageReceived (const MachException::Message& exceptionMessage) 1087{ 1088 PTHREAD_MUTEX_LOCKER (locker, m_exception_messages_mutex); 1089 1090 if (m_exception_messages.empty()) 1091 m_task.Suspend(); 1092 1093 DNBLogThreadedIf(LOG_EXCEPTIONS, "MachProcess::ExceptionMessageReceived ( )"); 1094 1095 // Use a locker to automatically unlock our mutex in case of exceptions 1096 // Add the exception to our internal exception stack 1097 m_exception_messages.push_back(exceptionMessage); 1098} 1099 1100void 1101MachProcess::ExceptionMessageBundleComplete() 1102{ 1103 // We have a complete bundle of exceptions for our child process. 1104 PTHREAD_MUTEX_LOCKER (locker, m_exception_messages_mutex); 1105 DNBLogThreadedIf(LOG_EXCEPTIONS, "%s: %llu exception messages.", __PRETTY_FUNCTION__, (uint64_t)m_exception_messages.size()); 1106 if (!m_exception_messages.empty()) 1107 { 1108 // Let all threads recover from stopping and do any clean up based 1109 // on the previous thread state (if any). 1110 m_thread_list.ProcessDidStop(this); 1111 1112 // Let each thread know of any exceptions 1113 task_t task = m_task.TaskPort(); 1114 size_t i; 1115 for (i=0; i<m_exception_messages.size(); ++i) 1116 { 1117 // Let the thread list figure use the MachProcess to forward all exceptions 1118 // on down to each thread. 1119 if (m_exception_messages[i].state.task_port == task) 1120 m_thread_list.NotifyException(m_exception_messages[i].state); 1121 if (DNBLogCheckLogBit(LOG_EXCEPTIONS)) 1122 m_exception_messages[i].Dump(); 1123 } 1124 1125 if (DNBLogCheckLogBit(LOG_THREAD)) 1126 m_thread_list.Dump(); 1127 1128 bool step_more = false; 1129 if (m_thread_list.ShouldStop(step_more)) 1130 { 1131 // Wait for the eEventProcessRunningStateChanged event to be reset 1132 // before changing state to stopped to avoid race condition with 1133 // very fast start/stops 1134 struct timespec timeout; 1135 //DNBTimer::OffsetTimeOfDay(&timeout, 0, 250 * 1000); // Wait for 250 ms 1136 DNBTimer::OffsetTimeOfDay(&timeout, 1, 0); // Wait for 250 ms 1137 m_events.WaitForEventsToReset(eEventProcessRunningStateChanged, &timeout); 1138 SetState(eStateStopped); 1139 } 1140 else 1141 { 1142 // Resume without checking our current state. 1143 PrivateResume (); 1144 } 1145 } 1146 else 1147 { 1148 DNBLogThreadedIf(LOG_EXCEPTIONS, "%s empty exception messages bundle (%llu exceptions).", __PRETTY_FUNCTION__, (uint64_t)m_exception_messages.size()); 1149 } 1150} 1151 1152nub_size_t 1153MachProcess::CopyImageInfos ( struct DNBExecutableImageInfo **image_infos, bool only_changed) 1154{ 1155 if (m_image_infos_callback != NULL) 1156 return m_image_infos_callback(ProcessID(), image_infos, only_changed, m_image_infos_baton); 1157 return 0; 1158} 1159 1160void 1161MachProcess::SharedLibrariesUpdated ( ) 1162{ 1163 uint32_t event_bits = eEventSharedLibsStateChange; 1164 // Set the shared library event bit to let clients know of shared library 1165 // changes 1166 m_events.SetEvents(event_bits); 1167 // Wait for the event bit to reset if a reset ACK is requested 1168 m_events.WaitForResetAck(event_bits); 1169} 1170 1171void 1172MachProcess::AppendSTDOUT (char* s, size_t len) 1173{ 1174 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s (<%llu> %s) ...", __FUNCTION__, (uint64_t)len, s); 1175 PTHREAD_MUTEX_LOCKER (locker, m_stdio_mutex); 1176 m_stdout_data.append(s, len); 1177 m_events.SetEvents(eEventStdioAvailable); 1178 1179 // Wait for the event bit to reset if a reset ACK is requested 1180 m_events.WaitForResetAck(eEventStdioAvailable); 1181} 1182 1183size_t 1184MachProcess::GetAvailableSTDOUT (char *buf, size_t buf_size) 1185{ 1186 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s (&%p[%llu]) ...", __FUNCTION__, buf, (uint64_t)buf_size); 1187 PTHREAD_MUTEX_LOCKER (locker, m_stdio_mutex); 1188 size_t bytes_available = m_stdout_data.size(); 1189 if (bytes_available > 0) 1190 { 1191 if (bytes_available > buf_size) 1192 { 1193 memcpy(buf, m_stdout_data.data(), buf_size); 1194 m_stdout_data.erase(0, buf_size); 1195 bytes_available = buf_size; 1196 } 1197 else 1198 { 1199 memcpy(buf, m_stdout_data.data(), bytes_available); 1200 m_stdout_data.clear(); 1201 } 1202 } 1203 return bytes_available; 1204} 1205 1206nub_addr_t 1207MachProcess::GetDYLDAllImageInfosAddress () 1208{ 1209 DNBError err; 1210 return m_task.GetDYLDAllImageInfosAddress(err); 1211} 1212 1213size_t 1214MachProcess::GetAvailableSTDERR (char *buf, size_t buf_size) 1215{ 1216 return 0; 1217} 1218 1219void * 1220MachProcess::STDIOThread(void *arg) 1221{ 1222 MachProcess *proc = (MachProcess*) arg; 1223 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s ( arg = %p ) thread starting...", __FUNCTION__, arg); 1224 1225 // We start use a base and more options so we can control if we 1226 // are currently using a timeout on the mach_msg. We do this to get a 1227 // bunch of related exceptions on our exception port so we can process 1228 // then together. When we have multiple threads, we can get an exception 1229 // per thread and they will come in consecutively. The main thread loop 1230 // will start by calling mach_msg to without having the MACH_RCV_TIMEOUT 1231 // flag set in the options, so we will wait forever for an exception on 1232 // our exception port. After we get one exception, we then will use the 1233 // MACH_RCV_TIMEOUT option with a zero timeout to grab all other current 1234 // exceptions for our process. After we have received the last pending 1235 // exception, we will get a timeout which enables us to then notify 1236 // our main thread that we have an exception bundle avaiable. We then wait 1237 // for the main thread to tell this exception thread to start trying to get 1238 // exceptions messages again and we start again with a mach_msg read with 1239 // infinite timeout. 1240 DNBError err; 1241 int stdout_fd = proc->GetStdoutFileDescriptor(); 1242 int stderr_fd = proc->GetStderrFileDescriptor(); 1243 if (stdout_fd == stderr_fd) 1244 stderr_fd = -1; 1245 1246 while (stdout_fd >= 0 || stderr_fd >= 0) 1247 { 1248 ::pthread_testcancel (); 1249 1250 fd_set read_fds; 1251 FD_ZERO (&read_fds); 1252 if (stdout_fd >= 0) 1253 FD_SET (stdout_fd, &read_fds); 1254 if (stderr_fd >= 0) 1255 FD_SET (stderr_fd, &read_fds); 1256 int nfds = std::max<int>(stdout_fd, stderr_fd) + 1; 1257 1258 int num_set_fds = select (nfds, &read_fds, NULL, NULL, NULL); 1259 DNBLogThreadedIf(LOG_PROCESS, "select (nfds, &read_fds, NULL, NULL, NULL) => %d", num_set_fds); 1260 1261 if (num_set_fds < 0) 1262 { 1263 int select_errno = errno; 1264 if (DNBLogCheckLogBit(LOG_PROCESS)) 1265 { 1266 err.SetError (select_errno, DNBError::POSIX); 1267 err.LogThreadedIfError("select (nfds, &read_fds, NULL, NULL, NULL) => %d", num_set_fds); 1268 } 1269 1270 switch (select_errno) 1271 { 1272 case EAGAIN: // The kernel was (perhaps temporarily) unable to allocate the requested number of file descriptors, or we have non-blocking IO 1273 break; 1274 case EBADF: // One of the descriptor sets specified an invalid descriptor. 1275 return NULL; 1276 break; 1277 case EINTR: // A signal was delivered before the time limit expired and before any of the selected events occurred. 1278 case EINVAL: // The specified time limit is invalid. One of its components is negative or too large. 1279 default: // Other unknown error 1280 break; 1281 } 1282 } 1283 else if (num_set_fds == 0) 1284 { 1285 } 1286 else 1287 { 1288 char s[1024]; 1289 s[sizeof(s)-1] = '\0'; // Ensure we have NULL termination 1290 int bytes_read = 0; 1291 if (stdout_fd >= 0 && FD_ISSET (stdout_fd, &read_fds)) 1292 { 1293 do 1294 { 1295 bytes_read = ::read (stdout_fd, s, sizeof(s)-1); 1296 if (bytes_read < 0) 1297 { 1298 int read_errno = errno; 1299 DNBLogThreadedIf(LOG_PROCESS, "read (stdout_fd, ) => %d errno: %d (%s)", bytes_read, read_errno, strerror(read_errno)); 1300 } 1301 else if (bytes_read == 0) 1302 { 1303 // EOF... 1304 DNBLogThreadedIf(LOG_PROCESS, "read (stdout_fd, ) => %d (reached EOF for child STDOUT)", bytes_read); 1305 stdout_fd = -1; 1306 } 1307 else if (bytes_read > 0) 1308 { 1309 proc->AppendSTDOUT(s, bytes_read); 1310 } 1311 1312 } while (bytes_read > 0); 1313 } 1314 1315 if (stderr_fd >= 0 && FD_ISSET (stderr_fd, &read_fds)) 1316 { 1317 do 1318 { 1319 bytes_read = ::read (stderr_fd, s, sizeof(s)-1); 1320 if (bytes_read < 0) 1321 { 1322 int read_errno = errno; 1323 DNBLogThreadedIf(LOG_PROCESS, "read (stderr_fd, ) => %d errno: %d (%s)", bytes_read, read_errno, strerror(read_errno)); 1324 } 1325 else if (bytes_read == 0) 1326 { 1327 // EOF... 1328 DNBLogThreadedIf(LOG_PROCESS, "read (stderr_fd, ) => %d (reached EOF for child STDERR)", bytes_read); 1329 stderr_fd = -1; 1330 } 1331 else if (bytes_read > 0) 1332 { 1333 proc->AppendSTDOUT(s, bytes_read); 1334 } 1335 1336 } while (bytes_read > 0); 1337 } 1338 } 1339 } 1340 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s (%p): thread exiting...", __FUNCTION__, arg); 1341 return NULL; 1342} 1343 1344 1345void 1346MachProcess::SignalAsyncProfileData (const char *info) 1347{ 1348 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s (%s) ...", __FUNCTION__, info); 1349 PTHREAD_MUTEX_LOCKER (locker, m_profile_data_mutex); 1350 m_profile_data.append(info); 1351 m_events.SetEvents(eEventProfileDataAvailable); 1352 1353 // Wait for the event bit to reset if a reset ACK is requested 1354 m_events.WaitForResetAck(eEventProfileDataAvailable); 1355} 1356 1357 1358size_t 1359MachProcess::GetAsyncProfileData (char *buf, size_t buf_size) 1360{ 1361 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s (&%p[%llu]) ...", __FUNCTION__, buf, (uint64_t)buf_size); 1362 PTHREAD_MUTEX_LOCKER (locker, m_profile_data_mutex); 1363 size_t bytes_available = m_profile_data.size(); 1364 if (bytes_available > 0) 1365 { 1366 if (bytes_available > buf_size) 1367 { 1368 memcpy(buf, m_profile_data.data(), buf_size); 1369 m_profile_data.erase(0, buf_size); 1370 bytes_available = buf_size; 1371 } 1372 else 1373 { 1374 memcpy(buf, m_profile_data.data(), bytes_available); 1375 m_profile_data.clear(); 1376 } 1377 } 1378 return bytes_available; 1379} 1380 1381 1382void * 1383MachProcess::ProfileThread(void *arg) 1384{ 1385 MachProcess *proc = (MachProcess*) arg; 1386 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s ( arg = %p ) thread starting...", __FUNCTION__, arg); 1387 1388 while (proc->IsProfilingEnabled()) 1389 { 1390 nub_state_t state = proc->GetState(); 1391 if (state == eStateRunning) 1392 { 1393 const char *data = proc->Task().GetProfileDataAsCString(); 1394 if (data) 1395 { 1396 proc->SignalAsyncProfileData(data); 1397 } 1398 } 1399 else if ((state == eStateUnloaded) || (state == eStateDetached) || (state == eStateUnloaded)) 1400 { 1401 // Done. Get out of this thread. 1402 break; 1403 } 1404 1405 // A simple way to set up the profile interval. We can also use select() or dispatch timer source if necessary. 1406 usleep(proc->ProfileInterval()); 1407 } 1408 return NULL; 1409} 1410 1411 1412pid_t 1413MachProcess::AttachForDebug (pid_t pid, char *err_str, size_t err_len) 1414{ 1415 // Clear out and clean up from any current state 1416 Clear(); 1417 if (pid != 0) 1418 { 1419 DNBError err; 1420 // Make sure the process exists... 1421 if (::getpgid (pid) < 0) 1422 { 1423 err.SetErrorToErrno(); 1424 const char *err_cstr = err.AsString(); 1425 ::snprintf (err_str, err_len, "%s", err_cstr ? err_cstr : "No such process"); 1426 return INVALID_NUB_PROCESS; 1427 } 1428 1429 SetState(eStateAttaching); 1430 m_pid = pid; 1431 // Let ourselves know we are going to be using SBS if the correct flag bit is set... 1432#ifdef WITH_SPRINGBOARD 1433 if (IsSBProcess(pid)) 1434 m_flags |= eMachProcessFlagsUsingSBS; 1435#endif 1436 if (!m_task.StartExceptionThread(err)) 1437 { 1438 const char *err_cstr = err.AsString(); 1439 ::snprintf (err_str, err_len, "%s", err_cstr ? err_cstr : "unable to start the exception thread"); 1440 DNBLogThreadedIf(LOG_PROCESS, "error: failed to attach to pid %d", pid); 1441 m_pid = INVALID_NUB_PROCESS; 1442 return INVALID_NUB_PROCESS; 1443 } 1444 1445 errno = 0; 1446 if (::ptrace (PT_ATTACHEXC, pid, 0, 0)) 1447 err.SetError(errno); 1448 else 1449 err.Clear(); 1450 1451 if (err.Success()) 1452 { 1453 m_flags |= eMachProcessFlagsAttached; 1454 // Sleep a bit to let the exception get received and set our process status 1455 // to stopped. 1456 ::usleep(250000); 1457 DNBLogThreadedIf(LOG_PROCESS, "successfully attached to pid %d", pid); 1458 return m_pid; 1459 } 1460 else 1461 { 1462 ::snprintf (err_str, err_len, "%s", err.AsString()); 1463 DNBLogThreadedIf(LOG_PROCESS, "error: failed to attach to pid %d", pid); 1464 } 1465 } 1466 return INVALID_NUB_PROCESS; 1467} 1468 1469// Do the process specific setup for attach. If this returns NULL, then there's no 1470// platform specific stuff to be done to wait for the attach. If you get non-null, 1471// pass that token to the CheckForProcess method, and then to CleanupAfterAttach. 1472 1473// Call PrepareForAttach before attaching to a process that has not yet launched 1474// This returns a token that can be passed to CheckForProcess, and to CleanupAfterAttach. 1475// You should call CleanupAfterAttach to free the token, and do whatever other 1476// cleanup seems good. 1477 1478const void * 1479MachProcess::PrepareForAttach (const char *path, nub_launch_flavor_t launch_flavor, bool waitfor, DNBError &err_str) 1480{ 1481#ifdef WITH_SPRINGBOARD 1482 // Tell SpringBoard to halt the next launch of this application on startup. 1483 1484 if (!waitfor) 1485 return NULL; 1486 1487 const char *app_ext = strstr(path, ".app"); 1488 if (app_ext == NULL) 1489 { 1490 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::PrepareForAttach(): path '%s' doesn't contain .app, we can't tell springboard to wait for launch...", path); 1491 return NULL; 1492 } 1493 1494 if (launch_flavor != eLaunchFlavorSpringBoard 1495 && launch_flavor != eLaunchFlavorDefault) 1496 return NULL; 1497 1498 std::string app_bundle_path(path, app_ext + strlen(".app")); 1499 1500 CFStringRef bundleIDCFStr = CopyBundleIDForPath (app_bundle_path.c_str (), err_str); 1501 std::string bundleIDStr; 1502 CFString::UTF8(bundleIDCFStr, bundleIDStr); 1503 DNBLogThreadedIf(LOG_PROCESS, "CopyBundleIDForPath (%s, err_str) returned @\"%s\"", app_bundle_path.c_str (), bundleIDStr.c_str()); 1504 1505 if (bundleIDCFStr == NULL) 1506 { 1507 return NULL; 1508 } 1509 1510 SBSApplicationLaunchError sbs_error = 0; 1511 1512 const char *stdout_err = "/dev/null"; 1513 CFString stdio_path; 1514 stdio_path.SetFileSystemRepresentation (stdout_err); 1515 1516 DNBLogThreadedIf(LOG_PROCESS, "SBSLaunchApplicationForDebugging ( @\"%s\" , NULL, NULL, NULL, @\"%s\", @\"%s\", SBSApplicationDebugOnNextLaunch | SBSApplicationLaunchWaitForDebugger )", bundleIDStr.c_str(), stdout_err, stdout_err); 1517 sbs_error = SBSLaunchApplicationForDebugging (bundleIDCFStr, 1518 (CFURLRef)NULL, // openURL 1519 NULL, // launch_argv.get(), 1520 NULL, // launch_envp.get(), // CFDictionaryRef environment 1521 stdio_path.get(), 1522 stdio_path.get(), 1523 SBSApplicationDebugOnNextLaunch | SBSApplicationLaunchWaitForDebugger); 1524 1525 if (sbs_error != SBSApplicationLaunchErrorSuccess) 1526 { 1527 err_str.SetError(sbs_error, DNBError::SpringBoard); 1528 return NULL; 1529 } 1530 1531 DNBLogThreadedIf(LOG_PROCESS, "Successfully set DebugOnNextLaunch."); 1532 return bundleIDCFStr; 1533# else 1534 return NULL; 1535#endif 1536} 1537 1538// Pass in the token you got from PrepareForAttach. If there is a process 1539// for that token, then the pid will be returned, otherwise INVALID_NUB_PROCESS 1540// will be returned. 1541 1542nub_process_t 1543MachProcess::CheckForProcess (const void *attach_token) 1544{ 1545 if (attach_token == NULL) 1546 return INVALID_NUB_PROCESS; 1547 1548#ifdef WITH_SPRINGBOARD 1549 CFStringRef bundleIDCFStr = (CFStringRef) attach_token; 1550 Boolean got_it; 1551 nub_process_t attach_pid; 1552 got_it = SBSProcessIDForDisplayIdentifier(bundleIDCFStr, &attach_pid); 1553 if (got_it) 1554 return attach_pid; 1555 else 1556 return INVALID_NUB_PROCESS; 1557#endif 1558 return INVALID_NUB_PROCESS; 1559} 1560 1561// Call this to clean up after you have either attached or given up on the attach. 1562// Pass true for success if you have attached, false if you have not. 1563// The token will also be freed at this point, so you can't use it after calling 1564// this method. 1565 1566void 1567MachProcess::CleanupAfterAttach (const void *attach_token, bool success, DNBError &err_str) 1568{ 1569#ifdef WITH_SPRINGBOARD 1570 if (attach_token == NULL) 1571 return; 1572 1573 // Tell SpringBoard to cancel the debug on next launch of this application 1574 // if we failed to attach 1575 if (!success) 1576 { 1577 SBSApplicationLaunchError sbs_error = 0; 1578 CFStringRef bundleIDCFStr = (CFStringRef) attach_token; 1579 1580 sbs_error = SBSLaunchApplicationForDebugging (bundleIDCFStr, 1581 (CFURLRef)NULL, 1582 NULL, 1583 NULL, 1584 NULL, 1585 NULL, 1586 SBSApplicationCancelDebugOnNextLaunch); 1587 1588 if (sbs_error != SBSApplicationLaunchErrorSuccess) 1589 { 1590 err_str.SetError(sbs_error, DNBError::SpringBoard); 1591 return; 1592 } 1593 } 1594 1595 CFRelease((CFStringRef) attach_token); 1596#endif 1597} 1598 1599pid_t 1600MachProcess::LaunchForDebug 1601( 1602 const char *path, 1603 char const *argv[], 1604 char const *envp[], 1605 const char *working_directory, // NULL => dont' change, non-NULL => set working directory for inferior to this 1606 const char *stdin_path, 1607 const char *stdout_path, 1608 const char *stderr_path, 1609 bool no_stdio, 1610 nub_launch_flavor_t launch_flavor, 1611 int disable_aslr, 1612 DNBError &launch_err 1613) 1614{ 1615 // Clear out and clean up from any current state 1616 Clear(); 1617 1618 DNBLogThreadedIf(LOG_PROCESS, "%s( path = '%s', argv = %p, envp = %p, launch_flavor = %u, disable_aslr = %d )", __FUNCTION__, path, argv, envp, launch_flavor, disable_aslr); 1619 1620 // Fork a child process for debugging 1621 SetState(eStateLaunching); 1622 1623 switch (launch_flavor) 1624 { 1625 case eLaunchFlavorForkExec: 1626 m_pid = MachProcess::ForkChildForPTraceDebugging (path, argv, envp, this, launch_err); 1627 break; 1628 1629#ifdef WITH_SPRINGBOARD 1630 1631 case eLaunchFlavorSpringBoard: 1632 { 1633 const char *app_ext = strstr(path, ".app"); 1634 if (app_ext && (app_ext[4] == '\0' || app_ext[4] == '/')) 1635 { 1636 std::string app_bundle_path(path, app_ext + strlen(".app")); 1637 if (SBLaunchForDebug (app_bundle_path.c_str(), argv, envp, no_stdio, launch_err) != 0) 1638 return m_pid; // A successful SBLaunchForDebug() returns and assigns a non-zero m_pid. 1639 else 1640 break; // We tried a springboard launch, but didn't succeed lets get out 1641 } 1642 } 1643 // In case the executable name has a ".app" fragment which confuses our debugserver, 1644 // let's do an intentional fallthrough here... 1645 launch_flavor = eLaunchFlavorPosixSpawn; 1646 1647#endif 1648 1649 case eLaunchFlavorPosixSpawn: 1650 m_pid = MachProcess::PosixSpawnChildForPTraceDebugging (path, 1651 DNBArchProtocol::GetArchitecture (), 1652 argv, 1653 envp, 1654 working_directory, 1655 stdin_path, 1656 stdout_path, 1657 stderr_path, 1658 no_stdio, 1659 this, 1660 disable_aslr, 1661 launch_err); 1662 break; 1663 1664 default: 1665 // Invalid launch 1666 launch_err.SetError(NUB_GENERIC_ERROR, DNBError::Generic); 1667 return INVALID_NUB_PROCESS; 1668 } 1669 1670 if (m_pid == INVALID_NUB_PROCESS) 1671 { 1672 // If we don't have a valid process ID and no one has set the error, 1673 // then return a generic error 1674 if (launch_err.Success()) 1675 launch_err.SetError(NUB_GENERIC_ERROR, DNBError::Generic); 1676 } 1677 else 1678 { 1679 m_path = path; 1680 size_t i; 1681 char const *arg; 1682 for (i=0; (arg = argv[i]) != NULL; i++) 1683 m_args.push_back(arg); 1684 1685 m_task.StartExceptionThread(launch_err); 1686 if (launch_err.Fail()) 1687 { 1688 if (launch_err.AsString() == NULL) 1689 launch_err.SetErrorString("unable to start the exception thread"); 1690 ::ptrace (PT_KILL, m_pid, 0, 0); 1691 m_pid = INVALID_NUB_PROCESS; 1692 return INVALID_NUB_PROCESS; 1693 } 1694 1695 StartSTDIOThread(); 1696 1697 if (launch_flavor == eLaunchFlavorPosixSpawn) 1698 { 1699 1700 SetState (eStateAttaching); 1701 errno = 0; 1702 int err = ::ptrace (PT_ATTACHEXC, m_pid, 0, 0); 1703 if (err == 0) 1704 { 1705 m_flags |= eMachProcessFlagsAttached; 1706 DNBLogThreadedIf(LOG_PROCESS, "successfully spawned pid %d", m_pid); 1707 launch_err.Clear(); 1708 } 1709 else 1710 { 1711 SetState (eStateExited); 1712 DNBError ptrace_err(errno, DNBError::POSIX); 1713 DNBLogThreadedIf(LOG_PROCESS, "error: failed to attach to spawned pid %d (err = %i, errno = %i (%s))", m_pid, err, ptrace_err.Error(), ptrace_err.AsString()); 1714 launch_err.SetError(NUB_GENERIC_ERROR, DNBError::Generic); 1715 } 1716 } 1717 else 1718 { 1719 launch_err.Clear(); 1720 } 1721 } 1722 return m_pid; 1723} 1724 1725pid_t 1726MachProcess::PosixSpawnChildForPTraceDebugging 1727( 1728 const char *path, 1729 cpu_type_t cpu_type, 1730 char const *argv[], 1731 char const *envp[], 1732 const char *working_directory, 1733 const char *stdin_path, 1734 const char *stdout_path, 1735 const char *stderr_path, 1736 bool no_stdio, 1737 MachProcess* process, 1738 int disable_aslr, 1739 DNBError& err 1740) 1741{ 1742 posix_spawnattr_t attr; 1743 short flags; 1744 DNBLogThreadedIf(LOG_PROCESS, "%s ( path='%s', argv=%p, envp=%p, working_dir=%s, stdin=%s, stdout=%s stderr=%s, no-stdio=%i)", 1745 __FUNCTION__, 1746 path, 1747 argv, 1748 envp, 1749 working_directory, 1750 stdin_path, 1751 stdout_path, 1752 stderr_path, 1753 no_stdio); 1754 1755 err.SetError( ::posix_spawnattr_init (&attr), DNBError::POSIX); 1756 if (err.Fail() || DNBLogCheckLogBit(LOG_PROCESS)) 1757 err.LogThreaded("::posix_spawnattr_init ( &attr )"); 1758 if (err.Fail()) 1759 return INVALID_NUB_PROCESS; 1760 1761 flags = POSIX_SPAWN_START_SUSPENDED | POSIX_SPAWN_SETSIGDEF | POSIX_SPAWN_SETSIGMASK; 1762 if (disable_aslr) 1763 flags |= _POSIX_SPAWN_DISABLE_ASLR; 1764 1765 sigset_t no_signals; 1766 sigset_t all_signals; 1767 sigemptyset (&no_signals); 1768 sigfillset (&all_signals); 1769 ::posix_spawnattr_setsigmask(&attr, &no_signals); 1770 ::posix_spawnattr_setsigdefault(&attr, &all_signals); 1771 1772 err.SetError( ::posix_spawnattr_setflags (&attr, flags), DNBError::POSIX); 1773 if (err.Fail() || DNBLogCheckLogBit(LOG_PROCESS)) 1774 err.LogThreaded("::posix_spawnattr_setflags ( &attr, POSIX_SPAWN_START_SUSPENDED%s )", flags & _POSIX_SPAWN_DISABLE_ASLR ? " | _POSIX_SPAWN_DISABLE_ASLR" : ""); 1775 if (err.Fail()) 1776 return INVALID_NUB_PROCESS; 1777 1778 // Don't do this on SnowLeopard, _sometimes_ the TASK_BASIC_INFO will fail 1779 // and we will fail to continue with our process... 1780 1781 // On SnowLeopard we should set "DYLD_NO_PIE" in the inferior environment.... 1782 1783#if !defined(__arm__) 1784 1785 // We don't need to do this for ARM, and we really shouldn't now that we 1786 // have multiple CPU subtypes and no posix_spawnattr call that allows us 1787 // to set which CPU subtype to launch... 1788 if (cpu_type != 0) 1789 { 1790 size_t ocount = 0; 1791 err.SetError( ::posix_spawnattr_setbinpref_np (&attr, 1, &cpu_type, &ocount), DNBError::POSIX); 1792 if (err.Fail() || DNBLogCheckLogBit(LOG_PROCESS)) 1793 err.LogThreaded("::posix_spawnattr_setbinpref_np ( &attr, 1, cpu_type = 0x%8.8x, count => %llu )", cpu_type, (uint64_t)ocount); 1794 1795 if (err.Fail() != 0 || ocount != 1) 1796 return INVALID_NUB_PROCESS; 1797 } 1798#endif 1799 1800 PseudoTerminal pty; 1801 1802 posix_spawn_file_actions_t file_actions; 1803 err.SetError( ::posix_spawn_file_actions_init (&file_actions), DNBError::POSIX); 1804 int file_actions_valid = err.Success(); 1805 if (!file_actions_valid || DNBLogCheckLogBit(LOG_PROCESS)) 1806 err.LogThreaded("::posix_spawn_file_actions_init ( &file_actions )"); 1807 int pty_error = -1; 1808 pid_t pid = INVALID_NUB_PROCESS; 1809 if (file_actions_valid) 1810 { 1811 if (stdin_path == NULL && stdout_path == NULL && stderr_path == NULL && !no_stdio) 1812 { 1813 pty_error = pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY); 1814 if (pty_error == PseudoTerminal::success) 1815 { 1816 stdin_path = stdout_path = stderr_path = pty.SlaveName(); 1817 } 1818 } 1819 1820 // if no_stdio or std paths not supplied, then route to "/dev/null". 1821 if (no_stdio || stdin_path == NULL || stdin_path[0] == '\0') 1822 stdin_path = "/dev/null"; 1823 if (no_stdio || stdout_path == NULL || stdout_path[0] == '\0') 1824 stdout_path = "/dev/null"; 1825 if (no_stdio || stderr_path == NULL || stderr_path[0] == '\0') 1826 stderr_path = "/dev/null"; 1827 1828 err.SetError( ::posix_spawn_file_actions_addopen (&file_actions, 1829 STDIN_FILENO, 1830 stdin_path, 1831 O_RDONLY | O_NOCTTY, 1832 0), 1833 DNBError::POSIX); 1834 if (err.Fail() || DNBLogCheckLogBit (LOG_PROCESS)) 1835 err.LogThreaded ("::posix_spawn_file_actions_addopen (&file_actions, filedes=STDIN_FILENO, path='%s')", stdin_path); 1836 1837 err.SetError( ::posix_spawn_file_actions_addopen (&file_actions, 1838 STDOUT_FILENO, 1839 stdout_path, 1840 O_WRONLY | O_NOCTTY | O_CREAT, 1841 0640), 1842 DNBError::POSIX); 1843 if (err.Fail() || DNBLogCheckLogBit (LOG_PROCESS)) 1844 err.LogThreaded ("::posix_spawn_file_actions_addopen (&file_actions, filedes=STDOUT_FILENO, path='%s')", stdout_path); 1845 1846 err.SetError( ::posix_spawn_file_actions_addopen (&file_actions, 1847 STDERR_FILENO, 1848 stderr_path, 1849 O_WRONLY | O_NOCTTY | O_CREAT, 1850 0640), 1851 DNBError::POSIX); 1852 if (err.Fail() || DNBLogCheckLogBit (LOG_PROCESS)) 1853 err.LogThreaded ("::posix_spawn_file_actions_addopen (&file_actions, filedes=STDERR_FILENO, path='%s')", stderr_path); 1854 1855 // TODO: Verify if we can set the working directory back immediately 1856 // after the posix_spawnp call without creating a race condition??? 1857 if (working_directory) 1858 ::chdir (working_directory); 1859 1860 err.SetError( ::posix_spawnp (&pid, path, &file_actions, &attr, (char * const*)argv, (char * const*)envp), DNBError::POSIX); 1861 if (err.Fail() || DNBLogCheckLogBit(LOG_PROCESS)) 1862 err.LogThreaded("::posix_spawnp ( pid => %i, path = '%s', file_actions = %p, attr = %p, argv = %p, envp = %p )", pid, path, &file_actions, &attr, argv, envp); 1863 } 1864 else 1865 { 1866 // TODO: Verify if we can set the working directory back immediately 1867 // after the posix_spawnp call without creating a race condition??? 1868 if (working_directory) 1869 ::chdir (working_directory); 1870 1871 err.SetError( ::posix_spawnp (&pid, path, NULL, &attr, (char * const*)argv, (char * const*)envp), DNBError::POSIX); 1872 if (err.Fail() || DNBLogCheckLogBit(LOG_PROCESS)) 1873 err.LogThreaded("::posix_spawnp ( pid => %i, path = '%s', file_actions = %p, attr = %p, argv = %p, envp = %p )", pid, path, NULL, &attr, argv, envp); 1874 } 1875 1876 // We have seen some cases where posix_spawnp was returning a valid 1877 // looking pid even when an error was returned, so clear it out 1878 if (err.Fail()) 1879 pid = INVALID_NUB_PROCESS; 1880 1881 if (pty_error == 0) 1882 { 1883 if (process != NULL) 1884 { 1885 int master_fd = pty.ReleaseMasterFD(); 1886 process->SetChildFileDescriptors(master_fd, master_fd, master_fd); 1887 } 1888 } 1889 ::posix_spawnattr_destroy (&attr); 1890 1891 if (pid != INVALID_NUB_PROCESS) 1892 { 1893 cpu_type_t pid_cpu_type = MachProcess::GetCPUTypeForLocalProcess (pid); 1894 DNBLogThreadedIf(LOG_PROCESS, "MachProcess::%s ( ) pid=%i, cpu_type=0x%8.8x", __FUNCTION__, pid, pid_cpu_type); 1895 if (pid_cpu_type) 1896 DNBArchProtocol::SetArchitecture (pid_cpu_type); 1897 } 1898 1899 if (file_actions_valid) 1900 { 1901 DNBError err2; 1902 err2.SetError( ::posix_spawn_file_actions_destroy (&file_actions), DNBError::POSIX); 1903 if (err2.Fail() || DNBLogCheckLogBit(LOG_PROCESS)) 1904 err2.LogThreaded("::posix_spawn_file_actions_destroy ( &file_actions )"); 1905 } 1906 1907 return pid; 1908} 1909 1910uint32_t 1911MachProcess::GetCPUTypeForLocalProcess (pid_t pid) 1912{ 1913 int mib[CTL_MAXNAME]={0,}; 1914 size_t len = CTL_MAXNAME; 1915 if (::sysctlnametomib("sysctl.proc_cputype", mib, &len)) 1916 return 0; 1917 1918 mib[len] = pid; 1919 len++; 1920 1921 cpu_type_t cpu; 1922 size_t cpu_len = sizeof(cpu); 1923 if (::sysctl (mib, len, &cpu, &cpu_len, 0, 0)) 1924 cpu = 0; 1925 return cpu; 1926} 1927 1928pid_t 1929MachProcess::ForkChildForPTraceDebugging 1930( 1931 const char *path, 1932 char const *argv[], 1933 char const *envp[], 1934 MachProcess* process, 1935 DNBError& launch_err 1936) 1937{ 1938 PseudoTerminal::Error pty_error = PseudoTerminal::success; 1939 1940 // Use a fork that ties the child process's stdin/out/err to a pseudo 1941 // terminal so we can read it in our MachProcess::STDIOThread 1942 // as unbuffered io. 1943 PseudoTerminal pty; 1944 pid_t pid = pty.Fork(pty_error); 1945 1946 if (pid < 0) 1947 { 1948 //-------------------------------------------------------------- 1949 // Error during fork. 1950 //-------------------------------------------------------------- 1951 return pid; 1952 } 1953 else if (pid == 0) 1954 { 1955 //-------------------------------------------------------------- 1956 // Child process 1957 //-------------------------------------------------------------- 1958 ::ptrace (PT_TRACE_ME, 0, 0, 0); // Debug this process 1959 ::ptrace (PT_SIGEXC, 0, 0, 0); // Get BSD signals as mach exceptions 1960 1961 // If our parent is setgid, lets make sure we don't inherit those 1962 // extra powers due to nepotism. 1963 if (::setgid (getgid ()) == 0) 1964 { 1965 1966 // Let the child have its own process group. We need to execute 1967 // this call in both the child and parent to avoid a race condition 1968 // between the two processes. 1969 ::setpgid (0, 0); // Set the child process group to match its pid 1970 1971 // Sleep a bit to before the exec call 1972 ::sleep (1); 1973 1974 // Turn this process into 1975 ::execv (path, (char * const *)argv); 1976 } 1977 // Exit with error code. Child process should have taken 1978 // over in above exec call and if the exec fails it will 1979 // exit the child process below. 1980 ::exit (127); 1981 } 1982 else 1983 { 1984 //-------------------------------------------------------------- 1985 // Parent process 1986 //-------------------------------------------------------------- 1987 // Let the child have its own process group. We need to execute 1988 // this call in both the child and parent to avoid a race condition 1989 // between the two processes. 1990 ::setpgid (pid, pid); // Set the child process group to match its pid 1991 1992 if (process != NULL) 1993 { 1994 // Release our master pty file descriptor so the pty class doesn't 1995 // close it and so we can continue to use it in our STDIO thread 1996 int master_fd = pty.ReleaseMasterFD(); 1997 process->SetChildFileDescriptors(master_fd, master_fd, master_fd); 1998 } 1999 } 2000 return pid; 2001} 2002 2003#ifdef WITH_SPRINGBOARD 2004 2005pid_t 2006MachProcess::SBLaunchForDebug (const char *path, char const *argv[], char const *envp[], bool no_stdio, DNBError &launch_err) 2007{ 2008 // Clear out and clean up from any current state 2009 Clear(); 2010 2011 DNBLogThreadedIf(LOG_PROCESS, "%s( '%s', argv)", __FUNCTION__, path); 2012 2013 // Fork a child process for debugging 2014 SetState(eStateLaunching); 2015 m_pid = MachProcess::SBForkChildForPTraceDebugging(path, argv, envp, no_stdio, this, launch_err); 2016 if (m_pid != 0) 2017 { 2018 m_flags |= eMachProcessFlagsUsingSBS; 2019 m_path = path; 2020 size_t i; 2021 char const *arg; 2022 for (i=0; (arg = argv[i]) != NULL; i++) 2023 m_args.push_back(arg); 2024 m_task.StartExceptionThread(launch_err); 2025 2026 if (launch_err.Fail()) 2027 { 2028 if (launch_err.AsString() == NULL) 2029 launch_err.SetErrorString("unable to start the exception thread"); 2030 ::ptrace (PT_KILL, m_pid, 0, 0); 2031 m_pid = INVALID_NUB_PROCESS; 2032 return INVALID_NUB_PROCESS; 2033 } 2034 2035 StartSTDIOThread(); 2036 SetState (eStateAttaching); 2037 int err = ::ptrace (PT_ATTACHEXC, m_pid, 0, 0); 2038 if (err == 0) 2039 { 2040 m_flags |= eMachProcessFlagsAttached; 2041 DNBLogThreadedIf(LOG_PROCESS, "successfully attached to pid %d", m_pid); 2042 } 2043 else 2044 { 2045 SetState (eStateExited); 2046 DNBLogThreadedIf(LOG_PROCESS, "error: failed to attach to pid %d", m_pid); 2047 } 2048 } 2049 return m_pid; 2050} 2051 2052#include <servers/bootstrap.h> 2053 2054// This returns a CFRetained pointer to the Bundle ID for app_bundle_path, 2055// or NULL if there was some problem getting the bundle id. 2056static CFStringRef 2057CopyBundleIDForPath (const char *app_bundle_path, DNBError &err_str) 2058{ 2059 CFBundle bundle(app_bundle_path); 2060 CFStringRef bundleIDCFStr = bundle.GetIdentifier(); 2061 std::string bundleID; 2062 if (CFString::UTF8(bundleIDCFStr, bundleID) == NULL) 2063 { 2064 struct stat app_bundle_stat; 2065 char err_msg[PATH_MAX]; 2066 2067 if (::stat (app_bundle_path, &app_bundle_stat) < 0) 2068 { 2069 err_str.SetError(errno, DNBError::POSIX); 2070 snprintf(err_msg, sizeof(err_msg), "%s: \"%s\"", err_str.AsString(), app_bundle_path); 2071 err_str.SetErrorString(err_msg); 2072 DNBLogThreadedIf(LOG_PROCESS, "%s() error: %s", __FUNCTION__, err_msg); 2073 } 2074 else 2075 { 2076 err_str.SetError(-1, DNBError::Generic); 2077 snprintf(err_msg, sizeof(err_msg), "failed to extract CFBundleIdentifier from %s", app_bundle_path); 2078 err_str.SetErrorString(err_msg); 2079 DNBLogThreadedIf(LOG_PROCESS, "%s() error: failed to extract CFBundleIdentifier from '%s'", __FUNCTION__, app_bundle_path); 2080 } 2081 return NULL; 2082 } 2083 2084 DNBLogThreadedIf(LOG_PROCESS, "%s() extracted CFBundleIdentifier: %s", __FUNCTION__, bundleID.c_str()); 2085 CFRetain (bundleIDCFStr); 2086 2087 return bundleIDCFStr; 2088} 2089 2090pid_t 2091MachProcess::SBForkChildForPTraceDebugging (const char *app_bundle_path, char const *argv[], char const *envp[], bool no_stdio, MachProcess* process, DNBError &launch_err) 2092{ 2093 DNBLogThreadedIf(LOG_PROCESS, "%s( '%s', argv, %p)", __FUNCTION__, app_bundle_path, process); 2094 CFAllocatorRef alloc = kCFAllocatorDefault; 2095 2096 if (argv[0] == NULL) 2097 return INVALID_NUB_PROCESS; 2098 2099 size_t argc = 0; 2100 // Count the number of arguments 2101 while (argv[argc] != NULL) 2102 argc++; 2103 2104 // Enumerate the arguments 2105 size_t first_launch_arg_idx = 1; 2106 CFReleaser<CFMutableArrayRef> launch_argv; 2107 2108 if (argv[first_launch_arg_idx]) 2109 { 2110 size_t launch_argc = argc > 0 ? argc - 1 : 0; 2111 launch_argv.reset (::CFArrayCreateMutable (alloc, launch_argc, &kCFTypeArrayCallBacks)); 2112 size_t i; 2113 char const *arg; 2114 CFString launch_arg; 2115 for (i=first_launch_arg_idx; (i < argc) && ((arg = argv[i]) != NULL); i++) 2116 { 2117 launch_arg.reset(::CFStringCreateWithCString (alloc, arg, kCFStringEncodingUTF8)); 2118 if (launch_arg.get() != NULL) 2119 CFArrayAppendValue(launch_argv.get(), launch_arg.get()); 2120 else 2121 break; 2122 } 2123 } 2124 2125 // Next fill in the arguments dictionary. Note, the envp array is of the form 2126 // Variable=value but SpringBoard wants a CF dictionary. So we have to convert 2127 // this here. 2128 2129 CFReleaser<CFMutableDictionaryRef> launch_envp; 2130 2131 if (envp[0]) 2132 { 2133 launch_envp.reset(::CFDictionaryCreateMutable(alloc, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks)); 2134 const char *value; 2135 int name_len; 2136 CFString name_string, value_string; 2137 2138 for (int i = 0; envp[i] != NULL; i++) 2139 { 2140 value = strstr (envp[i], "="); 2141 2142 // If the name field is empty or there's no =, skip it. Somebody's messing with us. 2143 if (value == NULL || value == envp[i]) 2144 continue; 2145 2146 name_len = value - envp[i]; 2147 2148 // Now move value over the "=" 2149 value++; 2150 2151 name_string.reset(::CFStringCreateWithBytes(alloc, (const UInt8 *) envp[i], name_len, kCFStringEncodingUTF8, false)); 2152 value_string.reset(::CFStringCreateWithCString(alloc, value, kCFStringEncodingUTF8)); 2153 CFDictionarySetValue (launch_envp.get(), name_string.get(), value_string.get()); 2154 } 2155 } 2156 2157 CFString stdio_path; 2158 2159 PseudoTerminal pty; 2160 if (!no_stdio) 2161 { 2162 PseudoTerminal::Error pty_err = pty.OpenFirstAvailableMaster(O_RDWR|O_NOCTTY); 2163 if (pty_err == PseudoTerminal::success) 2164 { 2165 const char* slave_name = pty.SlaveName(); 2166 DNBLogThreadedIf(LOG_PROCESS, "%s() successfully opened master pty, slave is %s", __FUNCTION__, slave_name); 2167 if (slave_name && slave_name[0]) 2168 { 2169 ::chmod (slave_name, S_IRWXU | S_IRWXG | S_IRWXO); 2170 stdio_path.SetFileSystemRepresentation (slave_name); 2171 } 2172 } 2173 } 2174 2175 if (stdio_path.get() == NULL) 2176 { 2177 stdio_path.SetFileSystemRepresentation ("/dev/null"); 2178 } 2179 2180 CFStringRef bundleIDCFStr = CopyBundleIDForPath (app_bundle_path, launch_err); 2181 if (bundleIDCFStr == NULL) 2182 return INVALID_NUB_PROCESS; 2183 2184 std::string bundleID; 2185 CFString::UTF8(bundleIDCFStr, bundleID); 2186 2187 CFData argv_data(NULL); 2188 2189 if (launch_argv.get()) 2190 { 2191 if (argv_data.Serialize(launch_argv.get(), kCFPropertyListBinaryFormat_v1_0) == NULL) 2192 { 2193 DNBLogThreadedIf(LOG_PROCESS, "%s() error: failed to serialize launch arg array...", __FUNCTION__); 2194 return INVALID_NUB_PROCESS; 2195 } 2196 } 2197 2198 DNBLogThreadedIf(LOG_PROCESS, "%s() serialized launch arg array", __FUNCTION__); 2199 2200 // Find SpringBoard 2201 SBSApplicationLaunchError sbs_error = 0; 2202 sbs_error = SBSLaunchApplicationForDebugging (bundleIDCFStr, 2203 (CFURLRef)NULL, // openURL 2204 launch_argv.get(), 2205 launch_envp.get(), // CFDictionaryRef environment 2206 stdio_path.get(), 2207 stdio_path.get(), 2208 SBSApplicationLaunchWaitForDebugger | SBSApplicationLaunchUnlockDevice); 2209 2210 2211 launch_err.SetError(sbs_error, DNBError::SpringBoard); 2212 2213 if (sbs_error == SBSApplicationLaunchErrorSuccess) 2214 { 2215 static const useconds_t pid_poll_interval = 200000; 2216 static const useconds_t pid_poll_timeout = 30000000; 2217 2218 useconds_t pid_poll_total = 0; 2219 2220 nub_process_t pid = INVALID_NUB_PROCESS; 2221 Boolean pid_found = SBSProcessIDForDisplayIdentifier(bundleIDCFStr, &pid); 2222 // Poll until the process is running, as long as we are getting valid responses and the timeout hasn't expired 2223 // A return PID of 0 means the process is not running, which may be because it hasn't been (asynchronously) started 2224 // yet, or that it died very quickly (if you weren't using waitForDebugger). 2225 while (!pid_found && pid_poll_total < pid_poll_timeout) 2226 { 2227 usleep (pid_poll_interval); 2228 pid_poll_total += pid_poll_interval; 2229 DNBLogThreadedIf(LOG_PROCESS, "%s() polling Springboard for pid for %s...", __FUNCTION__, bundleID.c_str()); 2230 pid_found = SBSProcessIDForDisplayIdentifier(bundleIDCFStr, &pid); 2231 } 2232 2233 CFRelease (bundleIDCFStr); 2234 if (pid_found) 2235 { 2236 if (process != NULL) 2237 { 2238 // Release our master pty file descriptor so the pty class doesn't 2239 // close it and so we can continue to use it in our STDIO thread 2240 int master_fd = pty.ReleaseMasterFD(); 2241 process->SetChildFileDescriptors(master_fd, master_fd, master_fd); 2242 } 2243 DNBLogThreadedIf(LOG_PROCESS, "%s() => pid = %4.4x", __FUNCTION__, pid); 2244 } 2245 else 2246 { 2247 DNBLogError("failed to lookup the process ID for CFBundleIdentifier %s.", bundleID.c_str()); 2248 } 2249 return pid; 2250 } 2251 2252 DNBLogError("unable to launch the application with CFBundleIdentifier '%s' sbs_error = %u", bundleID.c_str(), sbs_error); 2253 return INVALID_NUB_PROCESS; 2254} 2255 2256#endif // #ifdef WITH_SPRINGBOARD 2257 2258 2259