1 //===-- Thread.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 "lldb/lldb-python.h" 11 12 #include "lldb/lldb-private-log.h" 13 #include "lldb/Breakpoint/BreakpointLocation.h" 14 #include "lldb/Core/Debugger.h" 15 #include "lldb/Core/Log.h" 16 #include "lldb/Core/State.h" 17 #include "lldb/Core/Stream.h" 18 #include "lldb/Core/StreamString.h" 19 #include "lldb/Core/RegularExpression.h" 20 #include "lldb/Host/Host.h" 21 #include "lldb/Interpreter/OptionValueFileSpecList.h" 22 #include "lldb/Symbol/Function.h" 23 #include "lldb/Target/DynamicLoader.h" 24 #include "lldb/Target/ExecutionContext.h" 25 #include "lldb/Target/ObjCLanguageRuntime.h" 26 #include "lldb/Target/Process.h" 27 #include "lldb/Target/RegisterContext.h" 28 #include "lldb/Target/StopInfo.h" 29 #include "lldb/Target/Target.h" 30 #include "lldb/Target/Thread.h" 31 #include "lldb/Target/ThreadPlan.h" 32 #include "lldb/Target/ThreadPlanCallFunction.h" 33 #include "lldb/Target/ThreadPlanBase.h" 34 #include "lldb/Target/ThreadPlanStepInstruction.h" 35 #include "lldb/Target/ThreadPlanStepOut.h" 36 #include "lldb/Target/ThreadPlanStepOverBreakpoint.h" 37 #include "lldb/Target/ThreadPlanStepThrough.h" 38 #include "lldb/Target/ThreadPlanStepInRange.h" 39 #include "lldb/Target/ThreadPlanStepOverRange.h" 40 #include "lldb/Target/ThreadPlanRunToAddress.h" 41 #include "lldb/Target/ThreadPlanStepUntil.h" 42 #include "lldb/Target/ThreadSpec.h" 43 #include "lldb/Target/Unwind.h" 44 #include "Plugins/Process/Utility/UnwindLLDB.h" 45 #include "UnwindMacOSXFrameBackchain.h" 46 47 48 using namespace lldb; 49 using namespace lldb_private; 50 51 52 const ThreadPropertiesSP & 53 Thread::GetGlobalProperties() 54 { 55 static ThreadPropertiesSP g_settings_sp; 56 if (!g_settings_sp) 57 g_settings_sp.reset (new ThreadProperties (true)); 58 return g_settings_sp; 59 } 60 61 static PropertyDefinition 62 g_properties[] = 63 { 64 { "step-in-avoid-nodebug", OptionValue::eTypeBoolean, true, true, NULL, NULL, "If true, step-in will not stop in functions with no debug information." }, 65 { "step-out-avoid-nodebug", OptionValue::eTypeBoolean, true, false, NULL, NULL, "If true, when step-in/step-out/step-over leave the current frame, they will continue to step out till they come to a function with " 66 "debug information. Passing a frame argument to step-out will override this option." }, 67 { "step-avoid-regexp", OptionValue::eTypeRegex , true , REG_EXTENDED, "^std::", NULL, "A regular expression defining functions step-in won't stop in." }, 68 { "step-avoid-libraries", OptionValue::eTypeFileSpecList , true , REG_EXTENDED, NULL, NULL, "A list of libraries that source stepping won't stop in." }, 69 { "trace-thread", OptionValue::eTypeBoolean, false, false, NULL, NULL, "If true, this thread will single-step and log execution." }, 70 { NULL , OptionValue::eTypeInvalid, false, 0 , NULL, NULL, NULL } 71 }; 72 73 enum { 74 ePropertyStepInAvoidsNoDebug, 75 ePropertyStepOutAvoidsNoDebug, 76 ePropertyStepAvoidRegex, 77 ePropertyStepAvoidLibraries, 78 ePropertyEnableThreadTrace 79 }; 80 81 82 class ThreadOptionValueProperties : public OptionValueProperties 83 { 84 public: 85 ThreadOptionValueProperties (const ConstString &name) : 86 OptionValueProperties (name) 87 { 88 } 89 90 // This constructor is used when creating ThreadOptionValueProperties when it 91 // is part of a new lldb_private::Thread instance. It will copy all current 92 // global property values as needed 93 ThreadOptionValueProperties (ThreadProperties *global_properties) : 94 OptionValueProperties(*global_properties->GetValueProperties()) 95 { 96 } 97 98 virtual const Property * 99 GetPropertyAtIndex (const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const 100 { 101 // When gettings the value for a key from the thread options, we will always 102 // try and grab the setting from the current thread if there is one. Else we just 103 // use the one from this instance. 104 if (exe_ctx) 105 { 106 Thread *thread = exe_ctx->GetThreadPtr(); 107 if (thread) 108 { 109 ThreadOptionValueProperties *instance_properties = static_cast<ThreadOptionValueProperties *>(thread->GetValueProperties().get()); 110 if (this != instance_properties) 111 return instance_properties->ProtectedGetPropertyAtIndex (idx); 112 } 113 } 114 return ProtectedGetPropertyAtIndex (idx); 115 } 116 }; 117 118 119 120 ThreadProperties::ThreadProperties (bool is_global) : 121 Properties () 122 { 123 if (is_global) 124 { 125 m_collection_sp.reset (new ThreadOptionValueProperties(ConstString("thread"))); 126 m_collection_sp->Initialize(g_properties); 127 } 128 else 129 m_collection_sp.reset (new ThreadOptionValueProperties(Thread::GetGlobalProperties().get())); 130 } 131 132 ThreadProperties::~ThreadProperties() 133 { 134 } 135 136 const RegularExpression * 137 ThreadProperties::GetSymbolsToAvoidRegexp() 138 { 139 const uint32_t idx = ePropertyStepAvoidRegex; 140 return m_collection_sp->GetPropertyAtIndexAsOptionValueRegex (NULL, idx); 141 } 142 143 FileSpecList & 144 ThreadProperties::GetLibrariesToAvoid() const 145 { 146 const uint32_t idx = ePropertyStepAvoidLibraries; 147 OptionValueFileSpecList *option_value = m_collection_sp->GetPropertyAtIndexAsOptionValueFileSpecList (NULL, false, idx); 148 assert(option_value); 149 return option_value->GetCurrentValue(); 150 } 151 152 bool 153 ThreadProperties::GetTraceEnabledState() const 154 { 155 const uint32_t idx = ePropertyEnableThreadTrace; 156 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 157 } 158 159 bool 160 ThreadProperties::GetStepInAvoidsNoDebug() const 161 { 162 const uint32_t idx = ePropertyStepInAvoidsNoDebug; 163 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 164 } 165 166 bool 167 ThreadProperties::GetStepOutAvoidsNoDebug() const 168 { 169 const uint32_t idx = ePropertyStepOutAvoidsNoDebug; 170 return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); 171 } 172 173 174 //------------------------------------------------------------------ 175 // Thread Event Data 176 //------------------------------------------------------------------ 177 178 179 const ConstString & 180 Thread::ThreadEventData::GetFlavorString () 181 { 182 static ConstString g_flavor ("Thread::ThreadEventData"); 183 return g_flavor; 184 } 185 186 Thread::ThreadEventData::ThreadEventData (const lldb::ThreadSP thread_sp) : 187 m_thread_sp (thread_sp), 188 m_stack_id () 189 { 190 } 191 192 Thread::ThreadEventData::ThreadEventData (const lldb::ThreadSP thread_sp, const StackID &stack_id) : 193 m_thread_sp (thread_sp), 194 m_stack_id (stack_id) 195 { 196 } 197 198 Thread::ThreadEventData::ThreadEventData () : 199 m_thread_sp (), 200 m_stack_id () 201 { 202 } 203 204 Thread::ThreadEventData::~ThreadEventData () 205 { 206 } 207 208 void 209 Thread::ThreadEventData::Dump (Stream *s) const 210 { 211 212 } 213 214 const Thread::ThreadEventData * 215 Thread::ThreadEventData::GetEventDataFromEvent (const Event *event_ptr) 216 { 217 if (event_ptr) 218 { 219 const EventData *event_data = event_ptr->GetData(); 220 if (event_data && event_data->GetFlavor() == ThreadEventData::GetFlavorString()) 221 return static_cast <const ThreadEventData *> (event_ptr->GetData()); 222 } 223 return NULL; 224 } 225 226 ThreadSP 227 Thread::ThreadEventData::GetThreadFromEvent (const Event *event_ptr) 228 { 229 ThreadSP thread_sp; 230 const ThreadEventData *event_data = GetEventDataFromEvent (event_ptr); 231 if (event_data) 232 thread_sp = event_data->GetThread(); 233 return thread_sp; 234 } 235 236 StackID 237 Thread::ThreadEventData::GetStackIDFromEvent (const Event *event_ptr) 238 { 239 StackID stack_id; 240 const ThreadEventData *event_data = GetEventDataFromEvent (event_ptr); 241 if (event_data) 242 stack_id = event_data->GetStackID(); 243 return stack_id; 244 } 245 246 StackFrameSP 247 Thread::ThreadEventData::GetStackFrameFromEvent (const Event *event_ptr) 248 { 249 const ThreadEventData *event_data = GetEventDataFromEvent (event_ptr); 250 StackFrameSP frame_sp; 251 if (event_data) 252 { 253 ThreadSP thread_sp = event_data->GetThread(); 254 if (thread_sp) 255 { 256 frame_sp = thread_sp->GetStackFrameList()->GetFrameWithStackID (event_data->GetStackID()); 257 } 258 } 259 return frame_sp; 260 } 261 262 //------------------------------------------------------------------ 263 // Thread class 264 //------------------------------------------------------------------ 265 266 ConstString & 267 Thread::GetStaticBroadcasterClass () 268 { 269 static ConstString class_name ("lldb.thread"); 270 return class_name; 271 } 272 273 Thread::Thread (Process &process, lldb::tid_t tid, bool use_invalid_index_id) : 274 ThreadProperties (false), 275 UserID (tid), 276 Broadcaster(&process.GetTarget().GetDebugger(), Thread::GetStaticBroadcasterClass().AsCString()), 277 m_process_wp (process.shared_from_this()), 278 m_stop_info_sp (), 279 m_stop_info_stop_id (0), 280 m_index_id (use_invalid_index_id ? LLDB_INVALID_INDEX32 : process.GetNextThreadIndexID(tid)), 281 m_reg_context_sp (), 282 m_state (eStateUnloaded), 283 m_state_mutex (Mutex::eMutexTypeRecursive), 284 m_plan_stack (), 285 m_completed_plan_stack(), 286 m_frame_mutex (Mutex::eMutexTypeRecursive), 287 m_curr_frames_sp (), 288 m_prev_frames_sp (), 289 m_resume_signal (LLDB_INVALID_SIGNAL_NUMBER), 290 m_resume_state (eStateRunning), 291 m_temporary_resume_state (eStateRunning), 292 m_unwinder_ap (), 293 m_destroy_called (false), 294 m_override_should_notify (eLazyBoolCalculate) 295 { 296 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 297 if (log) 298 log->Printf ("%p Thread::Thread(tid = 0x%4.4" PRIx64 ")", this, GetID()); 299 300 CheckInWithManager(); 301 QueueFundamentalPlan(true); 302 } 303 304 305 Thread::~Thread() 306 { 307 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 308 if (log) 309 log->Printf ("%p Thread::~Thread(tid = 0x%4.4" PRIx64 ")", this, GetID()); 310 /// If you hit this assert, it means your derived class forgot to call DoDestroy in its destructor. 311 assert (m_destroy_called); 312 } 313 314 void 315 Thread::DestroyThread () 316 { 317 // Tell any plans on the plan stacks that the thread is being destroyed since 318 // any plans that have a thread go away in the middle of might need 319 // to do cleanup, or in some cases NOT do cleanup... 320 for (auto plan : m_plan_stack) 321 plan->ThreadDestroyed(); 322 323 for (auto plan : m_discarded_plan_stack) 324 plan->ThreadDestroyed(); 325 326 for (auto plan : m_completed_plan_stack) 327 plan->ThreadDestroyed(); 328 329 m_destroy_called = true; 330 m_plan_stack.clear(); 331 m_discarded_plan_stack.clear(); 332 m_completed_plan_stack.clear(); 333 334 // Push a ThreadPlanNull on the plan stack. That way we can continue assuming that the 335 // plan stack is never empty, but if somebody errantly asks questions of a destroyed thread 336 // without checking first whether it is destroyed, they won't crash. 337 ThreadPlanSP null_plan_sp(new ThreadPlanNull (*this)); 338 m_plan_stack.push_back (null_plan_sp); 339 340 m_stop_info_sp.reset(); 341 m_reg_context_sp.reset(); 342 m_unwinder_ap.reset(); 343 Mutex::Locker locker(m_frame_mutex); 344 m_curr_frames_sp.reset(); 345 m_prev_frames_sp.reset(); 346 } 347 348 void 349 Thread::BroadcastSelectedFrameChange(StackID &new_frame_id) 350 { 351 if (EventTypeHasListeners(eBroadcastBitSelectedFrameChanged)) 352 BroadcastEvent(eBroadcastBitSelectedFrameChanged, new ThreadEventData (this->shared_from_this(), new_frame_id)); 353 } 354 355 uint32_t 356 Thread::SetSelectedFrame (lldb_private::StackFrame *frame, bool broadcast) 357 { 358 uint32_t ret_value = GetStackFrameList()->SetSelectedFrame(frame); 359 if (broadcast) 360 BroadcastSelectedFrameChange(frame->GetStackID()); 361 return ret_value; 362 } 363 364 bool 365 Thread::SetSelectedFrameByIndex (uint32_t frame_idx, bool broadcast) 366 { 367 StackFrameSP frame_sp(GetStackFrameList()->GetFrameAtIndex (frame_idx)); 368 if (frame_sp) 369 { 370 GetStackFrameList()->SetSelectedFrame(frame_sp.get()); 371 if (broadcast) 372 BroadcastSelectedFrameChange(frame_sp->GetStackID()); 373 return true; 374 } 375 else 376 return false; 377 } 378 379 bool 380 Thread::SetSelectedFrameByIndexNoisily (uint32_t frame_idx, Stream &output_stream) 381 { 382 const bool broadcast = true; 383 bool success = SetSelectedFrameByIndex (frame_idx, broadcast); 384 if (success) 385 { 386 StackFrameSP frame_sp = GetSelectedFrame(); 387 if (frame_sp) 388 { 389 bool already_shown = false; 390 SymbolContext frame_sc(frame_sp->GetSymbolContext(eSymbolContextLineEntry)); 391 if (GetProcess()->GetTarget().GetDebugger().GetUseExternalEditor() && frame_sc.line_entry.file && frame_sc.line_entry.line != 0) 392 { 393 already_shown = Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); 394 } 395 396 bool show_frame_info = true; 397 bool show_source = !already_shown; 398 return frame_sp->GetStatus (output_stream, show_frame_info, show_source); 399 } 400 return false; 401 } 402 else 403 return false; 404 } 405 406 407 lldb::StopInfoSP 408 Thread::GetStopInfo () 409 { 410 if (m_destroy_called) 411 return m_stop_info_sp; 412 413 ThreadPlanSP plan_sp (GetCompletedPlan()); 414 ProcessSP process_sp (GetProcess()); 415 const uint32_t stop_id = process_sp ? process_sp->GetStopID() : UINT32_MAX; 416 if (plan_sp && plan_sp->PlanSucceeded()) 417 { 418 return StopInfo::CreateStopReasonWithPlan (plan_sp, GetReturnValueObject()); 419 } 420 else 421 { 422 if ((m_stop_info_stop_id == stop_id) || // Stop info is valid, just return what we have (even if empty) 423 (m_stop_info_sp && m_stop_info_sp->IsValid())) // Stop info is valid, just return what we have 424 { 425 return m_stop_info_sp; 426 } 427 else 428 { 429 GetPrivateStopInfo (); 430 return m_stop_info_sp; 431 } 432 } 433 } 434 435 lldb::StopInfoSP 436 Thread::GetPrivateStopInfo () 437 { 438 if (m_destroy_called) 439 return m_stop_info_sp; 440 441 ProcessSP process_sp (GetProcess()); 442 if (process_sp) 443 { 444 const uint32_t process_stop_id = process_sp->GetStopID(); 445 if (m_stop_info_stop_id != process_stop_id) 446 { 447 if (m_stop_info_sp) 448 { 449 if (m_stop_info_sp->IsValid() 450 || IsStillAtLastBreakpointHit() 451 || GetCurrentPlan()->IsVirtualStep()) 452 SetStopInfo (m_stop_info_sp); 453 else 454 m_stop_info_sp.reset(); 455 } 456 457 if (!m_stop_info_sp) 458 { 459 if (CalculateStopInfo() == false) 460 SetStopInfo (StopInfoSP()); 461 } 462 } 463 } 464 return m_stop_info_sp; 465 } 466 467 468 lldb::StopReason 469 Thread::GetStopReason() 470 { 471 lldb::StopInfoSP stop_info_sp (GetStopInfo ()); 472 if (stop_info_sp) 473 return stop_info_sp->GetStopReason(); 474 return eStopReasonNone; 475 } 476 477 478 479 void 480 Thread::SetStopInfo (const lldb::StopInfoSP &stop_info_sp) 481 { 482 m_stop_info_sp = stop_info_sp; 483 if (m_stop_info_sp) 484 { 485 m_stop_info_sp->MakeStopInfoValid(); 486 // If we are overriding the ShouldReportStop, do that here: 487 if (m_override_should_notify != eLazyBoolCalculate) 488 m_stop_info_sp->OverrideShouldNotify (m_override_should_notify == eLazyBoolYes); 489 } 490 491 ProcessSP process_sp (GetProcess()); 492 if (process_sp) 493 m_stop_info_stop_id = process_sp->GetStopID(); 494 else 495 m_stop_info_stop_id = UINT32_MAX; 496 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); 497 if (log) 498 log->Printf("%p: tid = 0x%" PRIx64 ": stop info = %s (stop_id = %u)\n", this, GetID(), stop_info_sp ? stop_info_sp->GetDescription() : "<NULL>", m_stop_info_stop_id); 499 } 500 501 void 502 Thread::SetShouldReportStop (Vote vote) 503 { 504 if (vote == eVoteNoOpinion) 505 return; 506 else 507 { 508 m_override_should_notify = (vote == eVoteYes ? eLazyBoolYes : eLazyBoolNo); 509 if (m_stop_info_sp) 510 m_stop_info_sp->OverrideShouldNotify (m_override_should_notify == eLazyBoolYes); 511 } 512 } 513 514 void 515 Thread::SetStopInfoToNothing() 516 { 517 // Note, we can't just NULL out the private reason, or the native thread implementation will try to 518 // go calculate it again. For now, just set it to a Unix Signal with an invalid signal number. 519 SetStopInfo (StopInfo::CreateStopReasonWithSignal (*this, LLDB_INVALID_SIGNAL_NUMBER)); 520 } 521 522 bool 523 Thread::ThreadStoppedForAReason (void) 524 { 525 return (bool) GetPrivateStopInfo (); 526 } 527 528 bool 529 Thread::CheckpointThreadState (ThreadStateCheckpoint &saved_state) 530 { 531 saved_state.register_backup_sp.reset(); 532 lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); 533 if (frame_sp) 534 { 535 lldb::RegisterCheckpointSP reg_checkpoint_sp(new RegisterCheckpoint(RegisterCheckpoint::Reason::eExpression)); 536 if (reg_checkpoint_sp) 537 { 538 lldb::RegisterContextSP reg_ctx_sp (frame_sp->GetRegisterContext()); 539 if (reg_ctx_sp && reg_ctx_sp->ReadAllRegisterValues (*reg_checkpoint_sp)) 540 saved_state.register_backup_sp = reg_checkpoint_sp; 541 } 542 } 543 if (!saved_state.register_backup_sp) 544 return false; 545 546 saved_state.stop_info_sp = GetStopInfo(); 547 ProcessSP process_sp (GetProcess()); 548 if (process_sp) 549 saved_state.orig_stop_id = process_sp->GetStopID(); 550 saved_state.current_inlined_depth = GetCurrentInlinedDepth(); 551 552 return true; 553 } 554 555 bool 556 Thread::RestoreRegisterStateFromCheckpoint (ThreadStateCheckpoint &saved_state) 557 { 558 if (saved_state.register_backup_sp) 559 { 560 lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); 561 if (frame_sp) 562 { 563 lldb::RegisterContextSP reg_ctx_sp (frame_sp->GetRegisterContext()); 564 if (reg_ctx_sp) 565 { 566 bool ret = reg_ctx_sp->WriteAllRegisterValues (*saved_state.register_backup_sp); 567 568 // Clear out all stack frames as our world just changed. 569 ClearStackFrames(); 570 reg_ctx_sp->InvalidateIfNeeded(true); 571 if (m_unwinder_ap.get()) 572 m_unwinder_ap->Clear(); 573 return ret; 574 } 575 } 576 } 577 return false; 578 } 579 580 bool 581 Thread::RestoreThreadStateFromCheckpoint (ThreadStateCheckpoint &saved_state) 582 { 583 if (saved_state.stop_info_sp) 584 saved_state.stop_info_sp->MakeStopInfoValid(); 585 SetStopInfo(saved_state.stop_info_sp); 586 GetStackFrameList()->SetCurrentInlinedDepth (saved_state.current_inlined_depth); 587 return true; 588 } 589 590 StateType 591 Thread::GetState() const 592 { 593 // If any other threads access this we will need a mutex for it 594 Mutex::Locker locker(m_state_mutex); 595 return m_state; 596 } 597 598 void 599 Thread::SetState(StateType state) 600 { 601 Mutex::Locker locker(m_state_mutex); 602 m_state = state; 603 } 604 605 void 606 Thread::WillStop() 607 { 608 ThreadPlan *current_plan = GetCurrentPlan(); 609 610 // FIXME: I may decide to disallow threads with no plans. In which 611 // case this should go to an assert. 612 613 if (!current_plan) 614 return; 615 616 current_plan->WillStop(); 617 } 618 619 void 620 Thread::SetupForResume () 621 { 622 if (GetResumeState() != eStateSuspended) 623 { 624 625 // If we're at a breakpoint push the step-over breakpoint plan. Do this before 626 // telling the current plan it will resume, since we might change what the current 627 // plan is. 628 629 // StopReason stop_reason = lldb::eStopReasonInvalid; 630 // StopInfoSP stop_info_sp = GetStopInfo(); 631 // if (stop_info_sp.get()) 632 // stop_reason = stop_info_sp->GetStopReason(); 633 // if (stop_reason == lldb::eStopReasonBreakpoint) 634 lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); 635 if (reg_ctx_sp) 636 { 637 BreakpointSiteSP bp_site_sp = GetProcess()->GetBreakpointSiteList().FindByAddress(reg_ctx_sp->GetPC()); 638 if (bp_site_sp) 639 { 640 // Note, don't assume there's a ThreadPlanStepOverBreakpoint, the target may not require anything 641 // special to step over a breakpoint. 642 643 ThreadPlan *cur_plan = GetCurrentPlan(); 644 645 if (cur_plan->GetKind() != ThreadPlan::eKindStepOverBreakpoint) 646 { 647 ThreadPlanStepOverBreakpoint *step_bp_plan = new ThreadPlanStepOverBreakpoint (*this); 648 if (step_bp_plan) 649 { 650 ThreadPlanSP step_bp_plan_sp; 651 step_bp_plan->SetPrivate (true); 652 653 if (GetCurrentPlan()->RunState() != eStateStepping) 654 { 655 step_bp_plan->SetAutoContinue(true); 656 } 657 step_bp_plan_sp.reset (step_bp_plan); 658 QueueThreadPlan (step_bp_plan_sp, false); 659 } 660 } 661 } 662 } 663 } 664 } 665 666 bool 667 Thread::ShouldResume (StateType resume_state) 668 { 669 // At this point clear the completed plan stack. 670 m_completed_plan_stack.clear(); 671 m_discarded_plan_stack.clear(); 672 m_override_should_notify = eLazyBoolCalculate; 673 674 m_temporary_resume_state = resume_state; 675 676 lldb::ThreadSP backing_thread_sp (GetBackingThread ()); 677 if (backing_thread_sp) 678 backing_thread_sp->m_temporary_resume_state = resume_state; 679 680 // Make sure m_stop_info_sp is valid 681 GetPrivateStopInfo(); 682 683 // This is a little dubious, but we are trying to limit how often we actually fetch stop info from 684 // the target, 'cause that slows down single stepping. So assume that if we got to the point where 685 // we're about to resume, and we haven't yet had to fetch the stop reason, then it doesn't need to know 686 // about the fact that we are resuming... 687 const uint32_t process_stop_id = GetProcess()->GetStopID(); 688 if (m_stop_info_stop_id == process_stop_id && 689 (m_stop_info_sp && m_stop_info_sp->IsValid())) 690 { 691 StopInfo *stop_info = GetPrivateStopInfo().get(); 692 if (stop_info) 693 stop_info->WillResume (resume_state); 694 } 695 696 // Tell all the plans that we are about to resume in case they need to clear any state. 697 // We distinguish between the plan on the top of the stack and the lower 698 // plans in case a plan needs to do any special business before it runs. 699 700 bool need_to_resume = false; 701 ThreadPlan *plan_ptr = GetCurrentPlan(); 702 if (plan_ptr) 703 { 704 need_to_resume = plan_ptr->WillResume(resume_state, true); 705 706 while ((plan_ptr = GetPreviousPlan(plan_ptr)) != NULL) 707 { 708 plan_ptr->WillResume (resume_state, false); 709 } 710 711 // If the WillResume for the plan says we are faking a resume, then it will have set an appropriate stop info. 712 // In that case, don't reset it here. 713 714 if (need_to_resume && resume_state != eStateSuspended) 715 { 716 m_stop_info_sp.reset(); 717 } 718 } 719 720 if (need_to_resume) 721 { 722 ClearStackFrames(); 723 // Let Thread subclasses do any special work they need to prior to resuming 724 WillResume (resume_state); 725 } 726 727 return need_to_resume; 728 } 729 730 void 731 Thread::DidResume () 732 { 733 SetResumeSignal (LLDB_INVALID_SIGNAL_NUMBER); 734 } 735 736 void 737 Thread::DidStop () 738 { 739 SetState (eStateStopped); 740 } 741 742 bool 743 Thread::ShouldStop (Event* event_ptr) 744 { 745 ThreadPlan *current_plan = GetCurrentPlan(); 746 747 bool should_stop = true; 748 749 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 750 751 if (GetResumeState () == eStateSuspended) 752 { 753 if (log) 754 log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", should_stop = 0 (ignore since thread was suspended)", 755 __FUNCTION__, 756 GetID (), 757 GetProtocolID()); 758 return false; 759 } 760 761 if (GetTemporaryResumeState () == eStateSuspended) 762 { 763 if (log) 764 log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", should_stop = 0 (ignore since thread was suspended)", 765 __FUNCTION__, 766 GetID (), 767 GetProtocolID()); 768 return false; 769 } 770 771 // Based on the current thread plan and process stop info, check if this 772 // thread caused the process to stop. NOTE: this must take place before 773 // the plan is moved from the current plan stack to the completed plan 774 // stack. 775 if (ThreadStoppedForAReason() == false) 776 { 777 if (log) 778 log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", pc = 0x%16.16" PRIx64 ", should_stop = 0 (ignore since no stop reason)", 779 __FUNCTION__, 780 GetID (), 781 GetProtocolID(), 782 GetRegisterContext() ? GetRegisterContext()->GetPC() : LLDB_INVALID_ADDRESS); 783 return false; 784 } 785 786 if (log) 787 { 788 log->Printf ("Thread::%s(%p) for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", pc = 0x%16.16" PRIx64, 789 __FUNCTION__, 790 this, 791 GetID (), 792 GetProtocolID (), 793 GetRegisterContext() ? GetRegisterContext()->GetPC() : LLDB_INVALID_ADDRESS); 794 log->Printf ("^^^^^^^^ Thread::ShouldStop Begin ^^^^^^^^"); 795 StreamString s; 796 s.IndentMore(); 797 DumpThreadPlans(&s); 798 log->Printf ("Plan stack initial state:\n%s", s.GetData()); 799 } 800 801 // The top most plan always gets to do the trace log... 802 current_plan->DoTraceLog (); 803 804 // First query the stop info's ShouldStopSynchronous. This handles "synchronous" stop reasons, for example the breakpoint 805 // command on internal breakpoints. If a synchronous stop reason says we should not stop, then we don't have to 806 // do any more work on this stop. 807 StopInfoSP private_stop_info (GetPrivateStopInfo()); 808 if (private_stop_info && private_stop_info->ShouldStopSynchronous(event_ptr) == false) 809 { 810 if (log) 811 log->Printf ("StopInfo::ShouldStop async callback says we should not stop, returning ShouldStop of false."); 812 return false; 813 } 814 815 // If we've already been restarted, don't query the plans since the state they would examine is not current. 816 if (Process::ProcessEventData::GetRestartedFromEvent(event_ptr)) 817 return false; 818 819 // Before the plans see the state of the world, calculate the current inlined depth. 820 GetStackFrameList()->CalculateCurrentInlinedDepth(); 821 822 // If the base plan doesn't understand why we stopped, then we have to find a plan that does. 823 // If that plan is still working, then we don't need to do any more work. If the plan that explains 824 // the stop is done, then we should pop all the plans below it, and pop it, and then let the plans above it decide 825 // whether they still need to do more work. 826 827 bool done_processing_current_plan = false; 828 829 if (!current_plan->PlanExplainsStop(event_ptr)) 830 { 831 if (current_plan->TracerExplainsStop()) 832 { 833 done_processing_current_plan = true; 834 should_stop = false; 835 } 836 else 837 { 838 // If the current plan doesn't explain the stop, then find one that 839 // does and let it handle the situation. 840 ThreadPlan *plan_ptr = current_plan; 841 while ((plan_ptr = GetPreviousPlan(plan_ptr)) != NULL) 842 { 843 if (plan_ptr->PlanExplainsStop(event_ptr)) 844 { 845 should_stop = plan_ptr->ShouldStop (event_ptr); 846 847 // plan_ptr explains the stop, next check whether plan_ptr is done, if so, then we should take it 848 // and all the plans below it off the stack. 849 850 if (plan_ptr->MischiefManaged()) 851 { 852 // We're going to pop the plans up to and including the plan that explains the stop. 853 ThreadPlan *prev_plan_ptr = GetPreviousPlan (plan_ptr); 854 855 do 856 { 857 if (should_stop) 858 current_plan->WillStop(); 859 PopPlan(); 860 } 861 while ((current_plan = GetCurrentPlan()) != prev_plan_ptr); 862 // Now, if the responsible plan was not "Okay to discard" then we're done, 863 // otherwise we forward this to the next plan in the stack below. 864 if (plan_ptr->IsMasterPlan() && !plan_ptr->OkayToDiscard()) 865 done_processing_current_plan = true; 866 else 867 done_processing_current_plan = false; 868 } 869 else 870 done_processing_current_plan = true; 871 872 break; 873 } 874 875 } 876 } 877 } 878 879 if (!done_processing_current_plan) 880 { 881 bool over_ride_stop = current_plan->ShouldAutoContinue(event_ptr); 882 883 if (log) 884 log->Printf("Plan %s explains stop, auto-continue %i.", current_plan->GetName(), over_ride_stop); 885 886 // We're starting from the base plan, so just let it decide; 887 if (PlanIsBasePlan(current_plan)) 888 { 889 should_stop = current_plan->ShouldStop (event_ptr); 890 if (log) 891 log->Printf("Base plan says should stop: %i.", should_stop); 892 } 893 else 894 { 895 // Otherwise, don't let the base plan override what the other plans say to do, since 896 // presumably if there were other plans they would know what to do... 897 while (1) 898 { 899 if (PlanIsBasePlan(current_plan)) 900 break; 901 902 should_stop = current_plan->ShouldStop(event_ptr); 903 if (log) 904 log->Printf("Plan %s should stop: %d.", current_plan->GetName(), should_stop); 905 if (current_plan->MischiefManaged()) 906 { 907 if (should_stop) 908 current_plan->WillStop(); 909 910 // If a Master Plan wants to stop, and wants to stick on the stack, we let it. 911 // Otherwise, see if the plan's parent wants to stop. 912 913 if (should_stop && current_plan->IsMasterPlan() && !current_plan->OkayToDiscard()) 914 { 915 PopPlan(); 916 break; 917 } 918 else 919 { 920 921 PopPlan(); 922 923 current_plan = GetCurrentPlan(); 924 if (current_plan == NULL) 925 { 926 break; 927 } 928 } 929 } 930 else 931 { 932 break; 933 } 934 } 935 } 936 937 if (over_ride_stop) 938 should_stop = false; 939 940 // One other potential problem is that we set up a master plan, then stop in before it is complete - for instance 941 // by hitting a breakpoint during a step-over - then do some step/finish/etc operations that wind up 942 // past the end point condition of the initial plan. We don't want to strand the original plan on the stack, 943 // This code clears stale plans off the stack. 944 945 if (should_stop) 946 { 947 ThreadPlan *plan_ptr = GetCurrentPlan(); 948 while (!PlanIsBasePlan(plan_ptr)) 949 { 950 bool stale = plan_ptr->IsPlanStale (); 951 ThreadPlan *examined_plan = plan_ptr; 952 plan_ptr = GetPreviousPlan (examined_plan); 953 954 if (stale) 955 { 956 if (log) 957 log->Printf("Plan %s being discarded in cleanup, it says it is already done.", examined_plan->GetName()); 958 DiscardThreadPlansUpToPlan(examined_plan); 959 } 960 } 961 } 962 963 } 964 965 if (log) 966 { 967 StreamString s; 968 s.IndentMore(); 969 DumpThreadPlans(&s); 970 log->Printf ("Plan stack final state:\n%s", s.GetData()); 971 log->Printf ("vvvvvvvv Thread::ShouldStop End (returning %i) vvvvvvvv", should_stop); 972 } 973 return should_stop; 974 } 975 976 Vote 977 Thread::ShouldReportStop (Event* event_ptr) 978 { 979 StateType thread_state = GetResumeState (); 980 StateType temp_thread_state = GetTemporaryResumeState(); 981 982 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 983 984 if (thread_state == eStateSuspended || thread_state == eStateInvalid) 985 { 986 if (log) 987 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (state was suspended or invalid)", GetID(), eVoteNoOpinion); 988 return eVoteNoOpinion; 989 } 990 991 if (temp_thread_state == eStateSuspended || temp_thread_state == eStateInvalid) 992 { 993 if (log) 994 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (temporary state was suspended or invalid)", GetID(), eVoteNoOpinion); 995 return eVoteNoOpinion; 996 } 997 998 if (!ThreadStoppedForAReason()) 999 { 1000 if (log) 1001 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (thread didn't stop for a reason.)", GetID(), eVoteNoOpinion); 1002 return eVoteNoOpinion; 1003 } 1004 1005 if (m_completed_plan_stack.size() > 0) 1006 { 1007 // Don't use GetCompletedPlan here, since that suppresses private plans. 1008 if (log) 1009 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote for complete stack's back plan", GetID()); 1010 return m_completed_plan_stack.back()->ShouldReportStop (event_ptr); 1011 } 1012 else 1013 { 1014 Vote thread_vote = eVoteNoOpinion; 1015 ThreadPlan *plan_ptr = GetCurrentPlan(); 1016 while (1) 1017 { 1018 if (plan_ptr->PlanExplainsStop(event_ptr)) 1019 { 1020 thread_vote = plan_ptr->ShouldReportStop(event_ptr); 1021 break; 1022 } 1023 if (PlanIsBasePlan(plan_ptr)) 1024 break; 1025 else 1026 plan_ptr = GetPreviousPlan(plan_ptr); 1027 } 1028 if (log) 1029 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i for current plan", GetID(), thread_vote); 1030 1031 return thread_vote; 1032 } 1033 } 1034 1035 Vote 1036 Thread::ShouldReportRun (Event* event_ptr) 1037 { 1038 StateType thread_state = GetResumeState (); 1039 1040 if (thread_state == eStateSuspended 1041 || thread_state == eStateInvalid) 1042 { 1043 return eVoteNoOpinion; 1044 } 1045 1046 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1047 if (m_completed_plan_stack.size() > 0) 1048 { 1049 // Don't use GetCompletedPlan here, since that suppresses private plans. 1050 if (log) 1051 log->Printf ("Current Plan for thread %d(%p) (0x%4.4" PRIx64 ", %s): %s being asked whether we should report run.", 1052 GetIndexID(), 1053 this, 1054 GetID(), 1055 StateAsCString(GetTemporaryResumeState()), 1056 m_completed_plan_stack.back()->GetName()); 1057 1058 return m_completed_plan_stack.back()->ShouldReportRun (event_ptr); 1059 } 1060 else 1061 { 1062 if (log) 1063 log->Printf ("Current Plan for thread %d(%p) (0x%4.4" PRIx64 ", %s): %s being asked whether we should report run.", 1064 GetIndexID(), 1065 this, 1066 GetID(), 1067 StateAsCString(GetTemporaryResumeState()), 1068 GetCurrentPlan()->GetName()); 1069 1070 return GetCurrentPlan()->ShouldReportRun (event_ptr); 1071 } 1072 } 1073 1074 bool 1075 Thread::MatchesSpec (const ThreadSpec *spec) 1076 { 1077 if (spec == NULL) 1078 return true; 1079 1080 return spec->ThreadPassesBasicTests(*this); 1081 } 1082 1083 void 1084 Thread::PushPlan (ThreadPlanSP &thread_plan_sp) 1085 { 1086 if (thread_plan_sp) 1087 { 1088 // If the thread plan doesn't already have a tracer, give it its parent's tracer: 1089 if (!thread_plan_sp->GetThreadPlanTracer()) 1090 thread_plan_sp->SetThreadPlanTracer(m_plan_stack.back()->GetThreadPlanTracer()); 1091 m_plan_stack.push_back (thread_plan_sp); 1092 1093 thread_plan_sp->DidPush(); 1094 1095 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1096 if (log) 1097 { 1098 StreamString s; 1099 thread_plan_sp->GetDescription (&s, lldb::eDescriptionLevelFull); 1100 log->Printf("Thread::PushPlan(0x%p): \"%s\", tid = 0x%4.4" PRIx64 ".", 1101 this, 1102 s.GetData(), 1103 thread_plan_sp->GetThread().GetID()); 1104 } 1105 } 1106 } 1107 1108 void 1109 Thread::PopPlan () 1110 { 1111 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1112 1113 if (m_plan_stack.size() <= 1) 1114 return; 1115 else 1116 { 1117 ThreadPlanSP &plan = m_plan_stack.back(); 1118 if (log) 1119 { 1120 log->Printf("Popping plan: \"%s\", tid = 0x%4.4" PRIx64 ".", plan->GetName(), plan->GetThread().GetID()); 1121 } 1122 m_completed_plan_stack.push_back (plan); 1123 plan->WillPop(); 1124 m_plan_stack.pop_back(); 1125 } 1126 } 1127 1128 void 1129 Thread::DiscardPlan () 1130 { 1131 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1132 if (m_plan_stack.size() > 1) 1133 { 1134 ThreadPlanSP &plan = m_plan_stack.back(); 1135 if (log) 1136 log->Printf("Discarding plan: \"%s\", tid = 0x%4.4" PRIx64 ".", plan->GetName(), plan->GetThread().GetID()); 1137 1138 m_discarded_plan_stack.push_back (plan); 1139 plan->WillPop(); 1140 m_plan_stack.pop_back(); 1141 } 1142 } 1143 1144 ThreadPlan * 1145 Thread::GetCurrentPlan () 1146 { 1147 // There will always be at least the base plan. If somebody is mucking with a 1148 // thread with an empty plan stack, we should assert right away. 1149 if (m_plan_stack.empty()) 1150 return NULL; 1151 return m_plan_stack.back().get(); 1152 } 1153 1154 ThreadPlanSP 1155 Thread::GetCompletedPlan () 1156 { 1157 ThreadPlanSP empty_plan_sp; 1158 if (!m_completed_plan_stack.empty()) 1159 { 1160 for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) 1161 { 1162 ThreadPlanSP completed_plan_sp; 1163 completed_plan_sp = m_completed_plan_stack[i]; 1164 if (!completed_plan_sp->GetPrivate ()) 1165 return completed_plan_sp; 1166 } 1167 } 1168 return empty_plan_sp; 1169 } 1170 1171 ValueObjectSP 1172 Thread::GetReturnValueObject () 1173 { 1174 if (!m_completed_plan_stack.empty()) 1175 { 1176 for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) 1177 { 1178 ValueObjectSP return_valobj_sp; 1179 return_valobj_sp = m_completed_plan_stack[i]->GetReturnValueObject(); 1180 if (return_valobj_sp) 1181 return return_valobj_sp; 1182 } 1183 } 1184 return ValueObjectSP(); 1185 } 1186 1187 bool 1188 Thread::IsThreadPlanDone (ThreadPlan *plan) 1189 { 1190 if (!m_completed_plan_stack.empty()) 1191 { 1192 for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) 1193 { 1194 if (m_completed_plan_stack[i].get() == plan) 1195 return true; 1196 } 1197 } 1198 return false; 1199 } 1200 1201 bool 1202 Thread::WasThreadPlanDiscarded (ThreadPlan *plan) 1203 { 1204 if (!m_discarded_plan_stack.empty()) 1205 { 1206 for (int i = m_discarded_plan_stack.size() - 1; i >= 0; i--) 1207 { 1208 if (m_discarded_plan_stack[i].get() == plan) 1209 return true; 1210 } 1211 } 1212 return false; 1213 } 1214 1215 ThreadPlan * 1216 Thread::GetPreviousPlan (ThreadPlan *current_plan) 1217 { 1218 if (current_plan == NULL) 1219 return NULL; 1220 1221 int stack_size = m_completed_plan_stack.size(); 1222 for (int i = stack_size - 1; i > 0; i--) 1223 { 1224 if (current_plan == m_completed_plan_stack[i].get()) 1225 return m_completed_plan_stack[i-1].get(); 1226 } 1227 1228 if (stack_size > 0 && m_completed_plan_stack[0].get() == current_plan) 1229 { 1230 if (m_plan_stack.size() > 0) 1231 return m_plan_stack.back().get(); 1232 else 1233 return NULL; 1234 } 1235 1236 stack_size = m_plan_stack.size(); 1237 for (int i = stack_size - 1; i > 0; i--) 1238 { 1239 if (current_plan == m_plan_stack[i].get()) 1240 return m_plan_stack[i-1].get(); 1241 } 1242 return NULL; 1243 } 1244 1245 void 1246 Thread::QueueThreadPlan (ThreadPlanSP &thread_plan_sp, bool abort_other_plans) 1247 { 1248 if (abort_other_plans) 1249 DiscardThreadPlans(true); 1250 1251 PushPlan (thread_plan_sp); 1252 } 1253 1254 1255 void 1256 Thread::EnableTracer (bool value, bool single_stepping) 1257 { 1258 int stack_size = m_plan_stack.size(); 1259 for (int i = 0; i < stack_size; i++) 1260 { 1261 if (m_plan_stack[i]->GetThreadPlanTracer()) 1262 { 1263 m_plan_stack[i]->GetThreadPlanTracer()->EnableTracing(value); 1264 m_plan_stack[i]->GetThreadPlanTracer()->EnableSingleStep(single_stepping); 1265 } 1266 } 1267 } 1268 1269 void 1270 Thread::SetTracer (lldb::ThreadPlanTracerSP &tracer_sp) 1271 { 1272 int stack_size = m_plan_stack.size(); 1273 for (int i = 0; i < stack_size; i++) 1274 m_plan_stack[i]->SetThreadPlanTracer(tracer_sp); 1275 } 1276 1277 void 1278 Thread::DiscardThreadPlansUpToPlan (lldb::ThreadPlanSP &up_to_plan_sp) 1279 { 1280 DiscardThreadPlansUpToPlan (up_to_plan_sp.get()); 1281 } 1282 1283 void 1284 Thread::DiscardThreadPlansUpToPlan (ThreadPlan *up_to_plan_ptr) 1285 { 1286 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1287 if (log) 1288 { 1289 log->Printf("Discarding thread plans for thread tid = 0x%4.4" PRIx64 ", up to %p", GetID(), up_to_plan_ptr); 1290 } 1291 1292 int stack_size = m_plan_stack.size(); 1293 1294 // If the input plan is NULL, discard all plans. Otherwise make sure this plan is in the 1295 // stack, and if so discard up to and including it. 1296 1297 if (up_to_plan_ptr == NULL) 1298 { 1299 for (int i = stack_size - 1; i > 0; i--) 1300 DiscardPlan(); 1301 } 1302 else 1303 { 1304 bool found_it = false; 1305 for (int i = stack_size - 1; i > 0; i--) 1306 { 1307 if (m_plan_stack[i].get() == up_to_plan_ptr) 1308 found_it = true; 1309 } 1310 if (found_it) 1311 { 1312 bool last_one = false; 1313 for (int i = stack_size - 1; i > 0 && !last_one ; i--) 1314 { 1315 if (GetCurrentPlan() == up_to_plan_ptr) 1316 last_one = true; 1317 DiscardPlan(); 1318 } 1319 } 1320 } 1321 return; 1322 } 1323 1324 void 1325 Thread::DiscardThreadPlans(bool force) 1326 { 1327 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1328 if (log) 1329 { 1330 log->Printf("Discarding thread plans for thread (tid = 0x%4.4" PRIx64 ", force %d)", GetID(), force); 1331 } 1332 1333 if (force) 1334 { 1335 int stack_size = m_plan_stack.size(); 1336 for (int i = stack_size - 1; i > 0; i--) 1337 { 1338 DiscardPlan(); 1339 } 1340 return; 1341 } 1342 1343 while (1) 1344 { 1345 1346 int master_plan_idx; 1347 bool discard = true; 1348 1349 // Find the first master plan, see if it wants discarding, and if yes discard up to it. 1350 for (master_plan_idx = m_plan_stack.size() - 1; master_plan_idx >= 0; master_plan_idx--) 1351 { 1352 if (m_plan_stack[master_plan_idx]->IsMasterPlan()) 1353 { 1354 discard = m_plan_stack[master_plan_idx]->OkayToDiscard(); 1355 break; 1356 } 1357 } 1358 1359 if (discard) 1360 { 1361 // First pop all the dependent plans: 1362 for (int i = m_plan_stack.size() - 1; i > master_plan_idx; i--) 1363 { 1364 1365 // FIXME: Do we need a finalize here, or is the rule that "PrepareForStop" 1366 // for the plan leaves it in a state that it is safe to pop the plan 1367 // with no more notice? 1368 DiscardPlan(); 1369 } 1370 1371 // Now discard the master plan itself. 1372 // The bottom-most plan never gets discarded. "OkayToDiscard" for it means 1373 // discard it's dependent plans, but not it... 1374 if (master_plan_idx > 0) 1375 { 1376 DiscardPlan(); 1377 } 1378 } 1379 else 1380 { 1381 // If the master plan doesn't want to get discarded, then we're done. 1382 break; 1383 } 1384 1385 } 1386 } 1387 1388 bool 1389 Thread::PlanIsBasePlan (ThreadPlan *plan_ptr) 1390 { 1391 if (plan_ptr->IsBasePlan()) 1392 return true; 1393 else if (m_plan_stack.size() == 0) 1394 return false; 1395 else 1396 return m_plan_stack[0].get() == plan_ptr; 1397 } 1398 1399 Error 1400 Thread::UnwindInnermostExpression() 1401 { 1402 Error error; 1403 int stack_size = m_plan_stack.size(); 1404 1405 // If the input plan is NULL, discard all plans. Otherwise make sure this plan is in the 1406 // stack, and if so discard up to and including it. 1407 1408 for (int i = stack_size - 1; i > 0; i--) 1409 { 1410 if (m_plan_stack[i]->GetKind() == ThreadPlan::eKindCallFunction) 1411 { 1412 DiscardThreadPlansUpToPlan(m_plan_stack[i].get()); 1413 return error; 1414 } 1415 } 1416 error.SetErrorString("No expressions currently active on this thread"); 1417 return error; 1418 } 1419 1420 1421 ThreadPlanSP 1422 Thread::QueueFundamentalPlan (bool abort_other_plans) 1423 { 1424 ThreadPlanSP thread_plan_sp (new ThreadPlanBase(*this)); 1425 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1426 return thread_plan_sp; 1427 } 1428 1429 ThreadPlanSP 1430 Thread::QueueThreadPlanForStepSingleInstruction 1431 ( 1432 bool step_over, 1433 bool abort_other_plans, 1434 bool stop_other_threads 1435 ) 1436 { 1437 ThreadPlanSP thread_plan_sp (new ThreadPlanStepInstruction (*this, step_over, stop_other_threads, eVoteNoOpinion, eVoteNoOpinion)); 1438 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1439 return thread_plan_sp; 1440 } 1441 1442 ThreadPlanSP 1443 Thread::QueueThreadPlanForStepOverRange 1444 ( 1445 bool abort_other_plans, 1446 const AddressRange &range, 1447 const SymbolContext &addr_context, 1448 lldb::RunMode stop_other_threads, 1449 LazyBool step_out_avoids_code_withoug_debug_info 1450 ) 1451 { 1452 ThreadPlanSP thread_plan_sp; 1453 thread_plan_sp.reset (new ThreadPlanStepOverRange (*this, range, addr_context, stop_other_threads, step_out_avoids_code_withoug_debug_info)); 1454 1455 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1456 return thread_plan_sp; 1457 } 1458 1459 ThreadPlanSP 1460 Thread::QueueThreadPlanForStepInRange 1461 ( 1462 bool abort_other_plans, 1463 const AddressRange &range, 1464 const SymbolContext &addr_context, 1465 const char *step_in_target, 1466 lldb::RunMode stop_other_threads, 1467 LazyBool step_in_avoids_code_without_debug_info, 1468 LazyBool step_out_avoids_code_without_debug_info 1469 ) 1470 { 1471 ThreadPlanSP thread_plan_sp; 1472 ThreadPlanStepInRange *plan = new ThreadPlanStepInRange (*this, 1473 range, 1474 addr_context, 1475 stop_other_threads, 1476 step_in_avoids_code_without_debug_info, 1477 step_out_avoids_code_without_debug_info); 1478 1479 if (step_in_target) 1480 plan->SetStepInTarget(step_in_target); 1481 1482 thread_plan_sp.reset (plan); 1483 1484 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1485 return thread_plan_sp; 1486 } 1487 1488 1489 ThreadPlanSP 1490 Thread::QueueThreadPlanForStepOut 1491 ( 1492 bool abort_other_plans, 1493 SymbolContext *addr_context, 1494 bool first_insn, 1495 bool stop_other_threads, 1496 Vote stop_vote, 1497 Vote run_vote, 1498 uint32_t frame_idx, 1499 LazyBool step_out_avoids_code_withoug_debug_info 1500 ) 1501 { 1502 ThreadPlanSP thread_plan_sp (new ThreadPlanStepOut (*this, 1503 addr_context, 1504 first_insn, 1505 stop_other_threads, 1506 stop_vote, 1507 run_vote, 1508 frame_idx, 1509 step_out_avoids_code_withoug_debug_info)); 1510 1511 if (thread_plan_sp->ValidatePlan(NULL)) 1512 { 1513 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1514 return thread_plan_sp; 1515 } 1516 else 1517 { 1518 return ThreadPlanSP(); 1519 } 1520 } 1521 1522 ThreadPlanSP 1523 Thread::QueueThreadPlanForStepOutNoShouldStop 1524 ( 1525 bool abort_other_plans, 1526 SymbolContext *addr_context, 1527 bool first_insn, 1528 bool stop_other_threads, 1529 Vote stop_vote, 1530 Vote run_vote, 1531 uint32_t frame_idx 1532 ) 1533 { 1534 ThreadPlanStepOut *new_plan = new ThreadPlanStepOut (*this, 1535 addr_context, 1536 first_insn, 1537 stop_other_threads, 1538 stop_vote, 1539 run_vote, 1540 frame_idx, 1541 eLazyBoolNo); 1542 new_plan->ClearShouldStopHereCallbacks(); 1543 ThreadPlanSP thread_plan_sp(new_plan); 1544 1545 if (thread_plan_sp->ValidatePlan(NULL)) 1546 { 1547 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1548 return thread_plan_sp; 1549 } 1550 else 1551 { 1552 return ThreadPlanSP(); 1553 } 1554 } 1555 1556 ThreadPlanSP 1557 Thread::QueueThreadPlanForStepThrough (StackID &return_stack_id, bool abort_other_plans, bool stop_other_threads) 1558 { 1559 ThreadPlanSP thread_plan_sp(new ThreadPlanStepThrough (*this, return_stack_id, stop_other_threads)); 1560 if (!thread_plan_sp || !thread_plan_sp->ValidatePlan (NULL)) 1561 return ThreadPlanSP(); 1562 1563 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1564 return thread_plan_sp; 1565 } 1566 1567 ThreadPlanSP 1568 Thread::QueueThreadPlanForRunToAddress (bool abort_other_plans, 1569 Address &target_addr, 1570 bool stop_other_threads) 1571 { 1572 ThreadPlanSP thread_plan_sp (new ThreadPlanRunToAddress (*this, target_addr, stop_other_threads)); 1573 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1574 return thread_plan_sp; 1575 } 1576 1577 ThreadPlanSP 1578 Thread::QueueThreadPlanForStepUntil (bool abort_other_plans, 1579 lldb::addr_t *address_list, 1580 size_t num_addresses, 1581 bool stop_other_threads, 1582 uint32_t frame_idx) 1583 { 1584 ThreadPlanSP thread_plan_sp (new ThreadPlanStepUntil (*this, address_list, num_addresses, stop_other_threads, frame_idx)); 1585 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1586 return thread_plan_sp; 1587 1588 } 1589 1590 uint32_t 1591 Thread::GetIndexID () const 1592 { 1593 return m_index_id; 1594 } 1595 1596 void 1597 Thread::DumpThreadPlans (lldb_private::Stream *s) const 1598 { 1599 uint32_t stack_size = m_plan_stack.size(); 1600 int i; 1601 s->Indent(); 1602 s->Printf ("Plan Stack for thread #%u: tid = 0x%4.4" PRIx64 ", stack_size = %d\n", GetIndexID(), GetID(), stack_size); 1603 for (i = stack_size - 1; i >= 0; i--) 1604 { 1605 s->IndentMore(); 1606 s->Indent(); 1607 s->Printf ("Element %d: ", i); 1608 m_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); 1609 s->EOL(); 1610 s->IndentLess(); 1611 } 1612 1613 stack_size = m_completed_plan_stack.size(); 1614 if (stack_size > 0) 1615 { 1616 s->Indent(); 1617 s->Printf ("Completed Plan Stack: %d elements.\n", stack_size); 1618 for (i = stack_size - 1; i >= 0; i--) 1619 { 1620 s->IndentMore(); 1621 s->Indent(); 1622 s->Printf ("Element %d: ", i); 1623 m_completed_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); 1624 s->EOL(); 1625 s->IndentLess(); 1626 } 1627 } 1628 1629 stack_size = m_discarded_plan_stack.size(); 1630 if (stack_size > 0) 1631 { 1632 s->Indent(); 1633 s->Printf ("Discarded Plan Stack: %d elements.\n", stack_size); 1634 for (i = stack_size - 1; i >= 0; i--) 1635 { 1636 s->IndentMore(); 1637 s->Indent(); 1638 s->Printf ("Element %d: ", i); 1639 m_discarded_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); 1640 s->EOL(); 1641 s->IndentLess(); 1642 } 1643 } 1644 1645 } 1646 1647 TargetSP 1648 Thread::CalculateTarget () 1649 { 1650 TargetSP target_sp; 1651 ProcessSP process_sp(GetProcess()); 1652 if (process_sp) 1653 target_sp = process_sp->CalculateTarget(); 1654 return target_sp; 1655 1656 } 1657 1658 ProcessSP 1659 Thread::CalculateProcess () 1660 { 1661 return GetProcess(); 1662 } 1663 1664 ThreadSP 1665 Thread::CalculateThread () 1666 { 1667 return shared_from_this(); 1668 } 1669 1670 StackFrameSP 1671 Thread::CalculateStackFrame () 1672 { 1673 return StackFrameSP(); 1674 } 1675 1676 void 1677 Thread::CalculateExecutionContext (ExecutionContext &exe_ctx) 1678 { 1679 exe_ctx.SetContext (shared_from_this()); 1680 } 1681 1682 1683 StackFrameListSP 1684 Thread::GetStackFrameList () 1685 { 1686 StackFrameListSP frame_list_sp; 1687 Mutex::Locker locker(m_frame_mutex); 1688 if (m_curr_frames_sp) 1689 { 1690 frame_list_sp = m_curr_frames_sp; 1691 } 1692 else 1693 { 1694 frame_list_sp.reset(new StackFrameList (*this, m_prev_frames_sp, true)); 1695 m_curr_frames_sp = frame_list_sp; 1696 } 1697 return frame_list_sp; 1698 } 1699 1700 void 1701 Thread::ClearStackFrames () 1702 { 1703 Mutex::Locker locker(m_frame_mutex); 1704 1705 Unwind *unwinder = GetUnwinder (); 1706 if (unwinder) 1707 unwinder->Clear(); 1708 1709 // Only store away the old "reference" StackFrameList if we got all its frames: 1710 // FIXME: At some point we can try to splice in the frames we have fetched into 1711 // the new frame as we make it, but let's not try that now. 1712 if (m_curr_frames_sp && m_curr_frames_sp->GetAllFramesFetched()) 1713 m_prev_frames_sp.swap (m_curr_frames_sp); 1714 m_curr_frames_sp.reset(); 1715 } 1716 1717 lldb::StackFrameSP 1718 Thread::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) 1719 { 1720 return GetStackFrameList()->GetFrameWithConcreteFrameIndex (unwind_idx); 1721 } 1722 1723 1724 Error 1725 Thread::ReturnFromFrameWithIndex (uint32_t frame_idx, lldb::ValueObjectSP return_value_sp, bool broadcast) 1726 { 1727 StackFrameSP frame_sp = GetStackFrameAtIndex (frame_idx); 1728 Error return_error; 1729 1730 if (!frame_sp) 1731 { 1732 return_error.SetErrorStringWithFormat("Could not find frame with index %d in thread 0x%" PRIx64 ".", frame_idx, GetID()); 1733 } 1734 1735 return ReturnFromFrame(frame_sp, return_value_sp, broadcast); 1736 } 1737 1738 Error 1739 Thread::ReturnFromFrame (lldb::StackFrameSP frame_sp, lldb::ValueObjectSP return_value_sp, bool broadcast) 1740 { 1741 Error return_error; 1742 1743 if (!frame_sp) 1744 { 1745 return_error.SetErrorString("Can't return to a null frame."); 1746 return return_error; 1747 } 1748 1749 Thread *thread = frame_sp->GetThread().get(); 1750 uint32_t older_frame_idx = frame_sp->GetFrameIndex() + 1; 1751 StackFrameSP older_frame_sp = thread->GetStackFrameAtIndex(older_frame_idx); 1752 if (!older_frame_sp) 1753 { 1754 return_error.SetErrorString("No older frame to return to."); 1755 return return_error; 1756 } 1757 1758 if (return_value_sp) 1759 { 1760 lldb::ABISP abi = thread->GetProcess()->GetABI(); 1761 if (!abi) 1762 { 1763 return_error.SetErrorString("Could not find ABI to set return value."); 1764 return return_error; 1765 } 1766 SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextFunction); 1767 1768 // FIXME: ValueObject::Cast doesn't currently work correctly, at least not for scalars. 1769 // Turn that back on when that works. 1770 if (0 && sc.function != NULL) 1771 { 1772 Type *function_type = sc.function->GetType(); 1773 if (function_type) 1774 { 1775 ClangASTType return_type = sc.function->GetClangType().GetFunctionReturnType(); 1776 if (return_type) 1777 { 1778 StreamString s; 1779 return_type.DumpTypeDescription(&s); 1780 ValueObjectSP cast_value_sp = return_value_sp->Cast(return_type); 1781 if (cast_value_sp) 1782 { 1783 cast_value_sp->SetFormat(eFormatHex); 1784 return_value_sp = cast_value_sp; 1785 } 1786 } 1787 } 1788 } 1789 1790 return_error = abi->SetReturnValueObject(older_frame_sp, return_value_sp); 1791 if (!return_error.Success()) 1792 return return_error; 1793 } 1794 1795 // Now write the return registers for the chosen frame: 1796 // Note, we can't use ReadAllRegisterValues->WriteAllRegisterValues, since the read & write 1797 // cook their data 1798 1799 StackFrameSP youngest_frame_sp = thread->GetStackFrameAtIndex(0); 1800 if (youngest_frame_sp) 1801 { 1802 lldb::RegisterContextSP reg_ctx_sp (youngest_frame_sp->GetRegisterContext()); 1803 if (reg_ctx_sp) 1804 { 1805 bool copy_success = reg_ctx_sp->CopyFromRegisterContext(older_frame_sp->GetRegisterContext()); 1806 if (copy_success) 1807 { 1808 thread->DiscardThreadPlans(true); 1809 thread->ClearStackFrames(); 1810 if (broadcast && EventTypeHasListeners(eBroadcastBitStackChanged)) 1811 BroadcastEvent(eBroadcastBitStackChanged, new ThreadEventData (this->shared_from_this())); 1812 } 1813 else 1814 { 1815 return_error.SetErrorString("Could not reset register values."); 1816 } 1817 } 1818 else 1819 { 1820 return_error.SetErrorString("Frame has no register context."); 1821 } 1822 } 1823 else 1824 { 1825 return_error.SetErrorString("Returned past top frame."); 1826 } 1827 return return_error; 1828 } 1829 1830 static void DumpAddressList (Stream &s, const std::vector<Address> &list, ExecutionContextScope *exe_scope) 1831 { 1832 for (size_t n=0;n<list.size();n++) 1833 { 1834 s << "\t"; 1835 list[n].Dump (&s, exe_scope, Address::DumpStyleResolvedDescription, Address::DumpStyleSectionNameOffset); 1836 s << "\n"; 1837 } 1838 } 1839 1840 Error 1841 Thread::JumpToLine (const FileSpec &file, uint32_t line, bool can_leave_function, std::string *warnings) 1842 { 1843 ExecutionContext exe_ctx (GetStackFrameAtIndex(0)); 1844 Target *target = exe_ctx.GetTargetPtr(); 1845 TargetSP target_sp = exe_ctx.GetTargetSP(); 1846 RegisterContext *reg_ctx = exe_ctx.GetRegisterContext(); 1847 StackFrame *frame = exe_ctx.GetFramePtr(); 1848 const SymbolContext &sc = frame->GetSymbolContext(eSymbolContextFunction); 1849 1850 // Find candidate locations. 1851 std::vector<Address> candidates, within_function, outside_function; 1852 target->GetImages().FindAddressesForLine (target_sp, file, line, sc.function, within_function, outside_function); 1853 1854 // If possible, we try and stay within the current function. 1855 // Within a function, we accept multiple locations (optimized code may do this, 1856 // there's no solution here so we do the best we can). 1857 // However if we're trying to leave the function, we don't know how to pick the 1858 // right location, so if there's more than one then we bail. 1859 if (!within_function.empty()) 1860 candidates = within_function; 1861 else if (outside_function.size() == 1 && can_leave_function) 1862 candidates = outside_function; 1863 1864 // Check if we got anything. 1865 if (candidates.empty()) 1866 { 1867 if (outside_function.empty()) 1868 { 1869 return Error("Cannot locate an address for %s:%i.", 1870 file.GetFilename().AsCString(), line); 1871 } 1872 else if (outside_function.size() == 1) 1873 { 1874 return Error("%s:%i is outside the current function.", 1875 file.GetFilename().AsCString(), line); 1876 } 1877 else 1878 { 1879 StreamString sstr; 1880 DumpAddressList(sstr, outside_function, target); 1881 return Error("%s:%i has multiple candidate locations:\n%s", 1882 file.GetFilename().AsCString(), line, sstr.GetString().c_str()); 1883 } 1884 } 1885 1886 // Accept the first location, warn about any others. 1887 Address dest = candidates[0]; 1888 if (warnings && candidates.size() > 1) 1889 { 1890 StreamString sstr; 1891 sstr.Printf("%s:%i appears multiple times in this function, selecting the first location:\n", 1892 file.GetFilename().AsCString(), line); 1893 DumpAddressList(sstr, candidates, target); 1894 *warnings = sstr.GetString(); 1895 } 1896 1897 if (!reg_ctx->SetPC (dest)) 1898 return Error("Cannot change PC to target address."); 1899 1900 return Error(); 1901 } 1902 1903 void 1904 Thread::DumpUsingSettingsFormat (Stream &strm, uint32_t frame_idx) 1905 { 1906 ExecutionContext exe_ctx (shared_from_this()); 1907 Process *process = exe_ctx.GetProcessPtr(); 1908 if (process == NULL) 1909 return; 1910 1911 StackFrameSP frame_sp; 1912 SymbolContext frame_sc; 1913 if (frame_idx != LLDB_INVALID_INDEX32) 1914 { 1915 frame_sp = GetStackFrameAtIndex (frame_idx); 1916 if (frame_sp) 1917 { 1918 exe_ctx.SetFrameSP(frame_sp); 1919 frame_sc = frame_sp->GetSymbolContext(eSymbolContextEverything); 1920 } 1921 } 1922 1923 const char *thread_format = exe_ctx.GetTargetRef().GetDebugger().GetThreadFormat(); 1924 assert (thread_format); 1925 Debugger::FormatPrompt (thread_format, 1926 frame_sp ? &frame_sc : NULL, 1927 &exe_ctx, 1928 NULL, 1929 strm); 1930 } 1931 1932 void 1933 Thread::SettingsInitialize () 1934 { 1935 } 1936 1937 void 1938 Thread::SettingsTerminate () 1939 { 1940 } 1941 1942 lldb::addr_t 1943 Thread::GetThreadPointer () 1944 { 1945 return LLDB_INVALID_ADDRESS; 1946 } 1947 1948 addr_t 1949 Thread::GetThreadLocalData (const ModuleSP module) 1950 { 1951 // The default implementation is to ask the dynamic loader for it. 1952 // This can be overridden for specific platforms. 1953 DynamicLoader *loader = GetProcess()->GetDynamicLoader(); 1954 if (loader) 1955 return loader->GetThreadLocalData (module, shared_from_this()); 1956 else 1957 return LLDB_INVALID_ADDRESS; 1958 } 1959 1960 lldb::StackFrameSP 1961 Thread::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) 1962 { 1963 return GetStackFrameList()->GetStackFrameSPForStackFramePtr (stack_frame_ptr); 1964 } 1965 1966 const char * 1967 Thread::StopReasonAsCString (lldb::StopReason reason) 1968 { 1969 switch (reason) 1970 { 1971 case eStopReasonInvalid: return "invalid"; 1972 case eStopReasonNone: return "none"; 1973 case eStopReasonTrace: return "trace"; 1974 case eStopReasonBreakpoint: return "breakpoint"; 1975 case eStopReasonWatchpoint: return "watchpoint"; 1976 case eStopReasonSignal: return "signal"; 1977 case eStopReasonException: return "exception"; 1978 case eStopReasonExec: return "exec"; 1979 case eStopReasonPlanComplete: return "plan complete"; 1980 case eStopReasonThreadExiting: return "thread exiting"; 1981 } 1982 1983 1984 static char unknown_state_string[64]; 1985 snprintf(unknown_state_string, sizeof (unknown_state_string), "StopReason = %i", reason); 1986 return unknown_state_string; 1987 } 1988 1989 const char * 1990 Thread::RunModeAsCString (lldb::RunMode mode) 1991 { 1992 switch (mode) 1993 { 1994 case eOnlyThisThread: return "only this thread"; 1995 case eAllThreads: return "all threads"; 1996 case eOnlyDuringStepping: return "only during stepping"; 1997 } 1998 1999 static char unknown_state_string[64]; 2000 snprintf(unknown_state_string, sizeof (unknown_state_string), "RunMode = %i", mode); 2001 return unknown_state_string; 2002 } 2003 2004 size_t 2005 Thread::GetStatus (Stream &strm, uint32_t start_frame, uint32_t num_frames, uint32_t num_frames_with_source) 2006 { 2007 ExecutionContext exe_ctx (shared_from_this()); 2008 Target *target = exe_ctx.GetTargetPtr(); 2009 Process *process = exe_ctx.GetProcessPtr(); 2010 size_t num_frames_shown = 0; 2011 strm.Indent(); 2012 bool is_selected = false; 2013 if (process) 2014 { 2015 if (process->GetThreadList().GetSelectedThread().get() == this) 2016 is_selected = true; 2017 } 2018 strm.Printf("%c ", is_selected ? '*' : ' '); 2019 if (target && target->GetDebugger().GetUseExternalEditor()) 2020 { 2021 StackFrameSP frame_sp = GetStackFrameAtIndex(start_frame); 2022 if (frame_sp) 2023 { 2024 SymbolContext frame_sc(frame_sp->GetSymbolContext (eSymbolContextLineEntry)); 2025 if (frame_sc.line_entry.line != 0 && frame_sc.line_entry.file) 2026 { 2027 Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); 2028 } 2029 } 2030 } 2031 2032 DumpUsingSettingsFormat (strm, start_frame); 2033 2034 if (num_frames > 0) 2035 { 2036 strm.IndentMore(); 2037 2038 const bool show_frame_info = true; 2039 2040 const char *selected_frame_marker = NULL; 2041 if (num_frames == 1 || (GetID() != GetProcess()->GetThreadList().GetSelectedThread()->GetID())) 2042 strm.IndentMore (); 2043 else 2044 selected_frame_marker = "* "; 2045 2046 num_frames_shown = GetStackFrameList ()->GetStatus (strm, 2047 start_frame, 2048 num_frames, 2049 show_frame_info, 2050 num_frames_with_source, 2051 selected_frame_marker); 2052 if (num_frames == 1) 2053 strm.IndentLess(); 2054 strm.IndentLess(); 2055 } 2056 return num_frames_shown; 2057 } 2058 2059 size_t 2060 Thread::GetStackFrameStatus (Stream& strm, 2061 uint32_t first_frame, 2062 uint32_t num_frames, 2063 bool show_frame_info, 2064 uint32_t num_frames_with_source) 2065 { 2066 return GetStackFrameList()->GetStatus (strm, 2067 first_frame, 2068 num_frames, 2069 show_frame_info, 2070 num_frames_with_source); 2071 } 2072 2073 Unwind * 2074 Thread::GetUnwinder () 2075 { 2076 if (m_unwinder_ap.get() == NULL) 2077 { 2078 const ArchSpec target_arch (CalculateTarget()->GetArchitecture ()); 2079 const llvm::Triple::ArchType machine = target_arch.GetMachine(); 2080 switch (machine) 2081 { 2082 case llvm::Triple::x86_64: 2083 case llvm::Triple::x86: 2084 case llvm::Triple::arm: 2085 case llvm::Triple::thumb: 2086 case llvm::Triple::mips64: 2087 case llvm::Triple::hexagon: 2088 m_unwinder_ap.reset (new UnwindLLDB (*this)); 2089 break; 2090 2091 default: 2092 if (target_arch.GetTriple().getVendor() == llvm::Triple::Apple) 2093 m_unwinder_ap.reset (new UnwindMacOSXFrameBackchain (*this)); 2094 break; 2095 } 2096 } 2097 return m_unwinder_ap.get(); 2098 } 2099 2100 2101 void 2102 Thread::Flush () 2103 { 2104 ClearStackFrames (); 2105 m_reg_context_sp.reset(); 2106 } 2107 2108 bool 2109 Thread::IsStillAtLastBreakpointHit () 2110 { 2111 // If we are currently stopped at a breakpoint, always return that stopinfo and don't reset it. 2112 // This allows threads to maintain their breakpoint stopinfo, such as when thread-stepping in 2113 // multithreaded programs. 2114 if (m_stop_info_sp) { 2115 StopReason stop_reason = m_stop_info_sp->GetStopReason(); 2116 if (stop_reason == lldb::eStopReasonBreakpoint) { 2117 uint64_t value = m_stop_info_sp->GetValue(); 2118 lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); 2119 if (reg_ctx_sp) 2120 { 2121 lldb::addr_t pc = reg_ctx_sp->GetPC(); 2122 BreakpointSiteSP bp_site_sp = GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 2123 if (bp_site_sp && value == bp_site_sp->GetID()) 2124 return true; 2125 } 2126 } 2127 } 2128 return false; 2129 } 2130 2131 2132 Error 2133 Thread::StepIn (bool source_step, 2134 LazyBool step_in_avoids_code_without_debug_info, 2135 LazyBool step_out_avoids_code_without_debug_info) 2136 2137 { 2138 Error error; 2139 Process *process = GetProcess().get(); 2140 if (StateIsStoppedState (process->GetState(), true)) 2141 { 2142 StackFrameSP frame_sp = GetStackFrameAtIndex (0); 2143 ThreadPlanSP new_plan_sp; 2144 const lldb::RunMode run_mode = eOnlyThisThread; 2145 const bool abort_other_plans = false; 2146 2147 if (source_step && frame_sp && frame_sp->HasDebugInformation ()) 2148 { 2149 SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything)); 2150 new_plan_sp = QueueThreadPlanForStepInRange (abort_other_plans, 2151 sc.line_entry.range, 2152 sc, 2153 NULL, 2154 run_mode, 2155 step_in_avoids_code_without_debug_info, 2156 step_out_avoids_code_without_debug_info); 2157 } 2158 else 2159 { 2160 new_plan_sp = QueueThreadPlanForStepSingleInstruction (false, 2161 abort_other_plans, 2162 run_mode); 2163 } 2164 2165 new_plan_sp->SetIsMasterPlan(true); 2166 new_plan_sp->SetOkayToDiscard(false); 2167 2168 // Why do we need to set the current thread by ID here??? 2169 process->GetThreadList().SetSelectedThreadByID (GetID()); 2170 error = process->Resume(); 2171 } 2172 else 2173 { 2174 error.SetErrorString("process not stopped"); 2175 } 2176 return error; 2177 } 2178 2179 Error 2180 Thread::StepOver (bool source_step, 2181 LazyBool step_out_avoids_code_without_debug_info) 2182 { 2183 Error error; 2184 Process *process = GetProcess().get(); 2185 if (StateIsStoppedState (process->GetState(), true)) 2186 { 2187 StackFrameSP frame_sp = GetStackFrameAtIndex (0); 2188 ThreadPlanSP new_plan_sp; 2189 2190 const lldb::RunMode run_mode = eOnlyThisThread; 2191 const bool abort_other_plans = false; 2192 2193 if (source_step && frame_sp && frame_sp->HasDebugInformation ()) 2194 { 2195 SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything)); 2196 new_plan_sp = QueueThreadPlanForStepOverRange (abort_other_plans, 2197 sc.line_entry.range, 2198 sc, 2199 run_mode, 2200 step_out_avoids_code_without_debug_info); 2201 } 2202 else 2203 { 2204 new_plan_sp = QueueThreadPlanForStepSingleInstruction (true, 2205 abort_other_plans, 2206 run_mode); 2207 } 2208 2209 new_plan_sp->SetIsMasterPlan(true); 2210 new_plan_sp->SetOkayToDiscard(false); 2211 2212 // Why do we need to set the current thread by ID here??? 2213 process->GetThreadList().SetSelectedThreadByID (GetID()); 2214 error = process->Resume(); 2215 } 2216 else 2217 { 2218 error.SetErrorString("process not stopped"); 2219 } 2220 return error; 2221 } 2222 2223 Error 2224 Thread::StepOut () 2225 { 2226 Error error; 2227 Process *process = GetProcess().get(); 2228 if (StateIsStoppedState (process->GetState(), true)) 2229 { 2230 const bool first_instruction = false; 2231 const bool stop_other_threads = false; 2232 const bool abort_other_plans = false; 2233 2234 ThreadPlanSP new_plan_sp(QueueThreadPlanForStepOut (abort_other_plans, 2235 NULL, 2236 first_instruction, 2237 stop_other_threads, 2238 eVoteYes, 2239 eVoteNoOpinion, 2240 0)); 2241 2242 new_plan_sp->SetIsMasterPlan(true); 2243 new_plan_sp->SetOkayToDiscard(false); 2244 2245 // Why do we need to set the current thread by ID here??? 2246 process->GetThreadList().SetSelectedThreadByID (GetID()); 2247 error = process->Resume(); 2248 } 2249 else 2250 { 2251 error.SetErrorString("process not stopped"); 2252 } 2253 return error; 2254 } 2255