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 ")", 299 static_cast<void*>(this), GetID()); 300 301 CheckInWithManager(); 302 QueueFundamentalPlan(true); 303 } 304 305 306 Thread::~Thread() 307 { 308 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); 309 if (log) 310 log->Printf ("%p Thread::~Thread(tid = 0x%4.4" PRIx64 ")", 311 static_cast<void*>(this), GetID()); 312 /// If you hit this assert, it means your derived class forgot to call DoDestroy in its destructor. 313 assert (m_destroy_called); 314 } 315 316 void 317 Thread::DestroyThread () 318 { 319 // Tell any plans on the plan stacks that the thread is being destroyed since 320 // any plans that have a thread go away in the middle of might need 321 // to do cleanup, or in some cases NOT do cleanup... 322 for (auto plan : m_plan_stack) 323 plan->ThreadDestroyed(); 324 325 for (auto plan : m_discarded_plan_stack) 326 plan->ThreadDestroyed(); 327 328 for (auto plan : m_completed_plan_stack) 329 plan->ThreadDestroyed(); 330 331 m_destroy_called = true; 332 m_plan_stack.clear(); 333 m_discarded_plan_stack.clear(); 334 m_completed_plan_stack.clear(); 335 336 // Push a ThreadPlanNull on the plan stack. That way we can continue assuming that the 337 // plan stack is never empty, but if somebody errantly asks questions of a destroyed thread 338 // without checking first whether it is destroyed, they won't crash. 339 ThreadPlanSP null_plan_sp(new ThreadPlanNull (*this)); 340 m_plan_stack.push_back (null_plan_sp); 341 342 m_stop_info_sp.reset(); 343 m_reg_context_sp.reset(); 344 m_unwinder_ap.reset(); 345 Mutex::Locker locker(m_frame_mutex); 346 m_curr_frames_sp.reset(); 347 m_prev_frames_sp.reset(); 348 } 349 350 void 351 Thread::BroadcastSelectedFrameChange(StackID &new_frame_id) 352 { 353 if (EventTypeHasListeners(eBroadcastBitSelectedFrameChanged)) 354 BroadcastEvent(eBroadcastBitSelectedFrameChanged, new ThreadEventData (this->shared_from_this(), new_frame_id)); 355 } 356 357 uint32_t 358 Thread::SetSelectedFrame (lldb_private::StackFrame *frame, bool broadcast) 359 { 360 uint32_t ret_value = GetStackFrameList()->SetSelectedFrame(frame); 361 if (broadcast) 362 BroadcastSelectedFrameChange(frame->GetStackID()); 363 return ret_value; 364 } 365 366 bool 367 Thread::SetSelectedFrameByIndex (uint32_t frame_idx, bool broadcast) 368 { 369 StackFrameSP frame_sp(GetStackFrameList()->GetFrameAtIndex (frame_idx)); 370 if (frame_sp) 371 { 372 GetStackFrameList()->SetSelectedFrame(frame_sp.get()); 373 if (broadcast) 374 BroadcastSelectedFrameChange(frame_sp->GetStackID()); 375 return true; 376 } 377 else 378 return false; 379 } 380 381 bool 382 Thread::SetSelectedFrameByIndexNoisily (uint32_t frame_idx, Stream &output_stream) 383 { 384 const bool broadcast = true; 385 bool success = SetSelectedFrameByIndex (frame_idx, broadcast); 386 if (success) 387 { 388 StackFrameSP frame_sp = GetSelectedFrame(); 389 if (frame_sp) 390 { 391 bool already_shown = false; 392 SymbolContext frame_sc(frame_sp->GetSymbolContext(eSymbolContextLineEntry)); 393 if (GetProcess()->GetTarget().GetDebugger().GetUseExternalEditor() && frame_sc.line_entry.file && frame_sc.line_entry.line != 0) 394 { 395 already_shown = Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); 396 } 397 398 bool show_frame_info = true; 399 bool show_source = !already_shown; 400 return frame_sp->GetStatus (output_stream, show_frame_info, show_source); 401 } 402 return false; 403 } 404 else 405 return false; 406 } 407 408 409 lldb::StopInfoSP 410 Thread::GetStopInfo () 411 { 412 if (m_destroy_called) 413 return m_stop_info_sp; 414 415 ThreadPlanSP plan_sp (GetCompletedPlan()); 416 ProcessSP process_sp (GetProcess()); 417 const uint32_t stop_id = process_sp ? process_sp->GetStopID() : UINT32_MAX; 418 if (plan_sp && plan_sp->PlanSucceeded()) 419 { 420 return StopInfo::CreateStopReasonWithPlan (plan_sp, GetReturnValueObject()); 421 } 422 else 423 { 424 if ((m_stop_info_stop_id == stop_id) || // Stop info is valid, just return what we have (even if empty) 425 (m_stop_info_sp && m_stop_info_sp->IsValid())) // Stop info is valid, just return what we have 426 { 427 return m_stop_info_sp; 428 } 429 else 430 { 431 GetPrivateStopInfo (); 432 return m_stop_info_sp; 433 } 434 } 435 } 436 437 lldb::StopInfoSP 438 Thread::GetPrivateStopInfo () 439 { 440 if (m_destroy_called) 441 return m_stop_info_sp; 442 443 ProcessSP process_sp (GetProcess()); 444 if (process_sp) 445 { 446 const uint32_t process_stop_id = process_sp->GetStopID(); 447 if (m_stop_info_stop_id != process_stop_id) 448 { 449 if (m_stop_info_sp) 450 { 451 if (m_stop_info_sp->IsValid() 452 || IsStillAtLastBreakpointHit() 453 || GetCurrentPlan()->IsVirtualStep()) 454 SetStopInfo (m_stop_info_sp); 455 else 456 m_stop_info_sp.reset(); 457 } 458 459 if (!m_stop_info_sp) 460 { 461 if (CalculateStopInfo() == false) 462 SetStopInfo (StopInfoSP()); 463 } 464 } 465 } 466 return m_stop_info_sp; 467 } 468 469 470 lldb::StopReason 471 Thread::GetStopReason() 472 { 473 lldb::StopInfoSP stop_info_sp (GetStopInfo ()); 474 if (stop_info_sp) 475 return stop_info_sp->GetStopReason(); 476 return eStopReasonNone; 477 } 478 479 480 481 void 482 Thread::SetStopInfo (const lldb::StopInfoSP &stop_info_sp) 483 { 484 m_stop_info_sp = stop_info_sp; 485 if (m_stop_info_sp) 486 { 487 m_stop_info_sp->MakeStopInfoValid(); 488 // If we are overriding the ShouldReportStop, do that here: 489 if (m_override_should_notify != eLazyBoolCalculate) 490 m_stop_info_sp->OverrideShouldNotify (m_override_should_notify == eLazyBoolYes); 491 } 492 493 ProcessSP process_sp (GetProcess()); 494 if (process_sp) 495 m_stop_info_stop_id = process_sp->GetStopID(); 496 else 497 m_stop_info_stop_id = UINT32_MAX; 498 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); 499 if (log) 500 log->Printf("%p: tid = 0x%" PRIx64 ": stop info = %s (stop_id = %u)\n", 501 static_cast<void*>(this), GetID(), 502 stop_info_sp ? stop_info_sp->GetDescription() : "<NULL>", 503 m_stop_info_stop_id); 504 } 505 506 void 507 Thread::SetShouldReportStop (Vote vote) 508 { 509 if (vote == eVoteNoOpinion) 510 return; 511 else 512 { 513 m_override_should_notify = (vote == eVoteYes ? eLazyBoolYes : eLazyBoolNo); 514 if (m_stop_info_sp) 515 m_stop_info_sp->OverrideShouldNotify (m_override_should_notify == eLazyBoolYes); 516 } 517 } 518 519 void 520 Thread::SetStopInfoToNothing() 521 { 522 // Note, we can't just NULL out the private reason, or the native thread implementation will try to 523 // go calculate it again. For now, just set it to a Unix Signal with an invalid signal number. 524 SetStopInfo (StopInfo::CreateStopReasonWithSignal (*this, LLDB_INVALID_SIGNAL_NUMBER)); 525 } 526 527 bool 528 Thread::ThreadStoppedForAReason (void) 529 { 530 return (bool) GetPrivateStopInfo (); 531 } 532 533 bool 534 Thread::CheckpointThreadState (ThreadStateCheckpoint &saved_state) 535 { 536 saved_state.register_backup_sp.reset(); 537 lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); 538 if (frame_sp) 539 { 540 lldb::RegisterCheckpointSP reg_checkpoint_sp(new RegisterCheckpoint(RegisterCheckpoint::Reason::eExpression)); 541 if (reg_checkpoint_sp) 542 { 543 lldb::RegisterContextSP reg_ctx_sp (frame_sp->GetRegisterContext()); 544 if (reg_ctx_sp && reg_ctx_sp->ReadAllRegisterValues (*reg_checkpoint_sp)) 545 saved_state.register_backup_sp = reg_checkpoint_sp; 546 } 547 } 548 if (!saved_state.register_backup_sp) 549 return false; 550 551 saved_state.stop_info_sp = GetStopInfo(); 552 ProcessSP process_sp (GetProcess()); 553 if (process_sp) 554 saved_state.orig_stop_id = process_sp->GetStopID(); 555 saved_state.current_inlined_depth = GetCurrentInlinedDepth(); 556 557 return true; 558 } 559 560 bool 561 Thread::RestoreRegisterStateFromCheckpoint (ThreadStateCheckpoint &saved_state) 562 { 563 if (saved_state.register_backup_sp) 564 { 565 lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); 566 if (frame_sp) 567 { 568 lldb::RegisterContextSP reg_ctx_sp (frame_sp->GetRegisterContext()); 569 if (reg_ctx_sp) 570 { 571 bool ret = reg_ctx_sp->WriteAllRegisterValues (*saved_state.register_backup_sp); 572 573 // Clear out all stack frames as our world just changed. 574 ClearStackFrames(); 575 reg_ctx_sp->InvalidateIfNeeded(true); 576 if (m_unwinder_ap.get()) 577 m_unwinder_ap->Clear(); 578 return ret; 579 } 580 } 581 } 582 return false; 583 } 584 585 bool 586 Thread::RestoreThreadStateFromCheckpoint (ThreadStateCheckpoint &saved_state) 587 { 588 if (saved_state.stop_info_sp) 589 saved_state.stop_info_sp->MakeStopInfoValid(); 590 SetStopInfo(saved_state.stop_info_sp); 591 GetStackFrameList()->SetCurrentInlinedDepth (saved_state.current_inlined_depth); 592 return true; 593 } 594 595 StateType 596 Thread::GetState() const 597 { 598 // If any other threads access this we will need a mutex for it 599 Mutex::Locker locker(m_state_mutex); 600 return m_state; 601 } 602 603 void 604 Thread::SetState(StateType state) 605 { 606 Mutex::Locker locker(m_state_mutex); 607 m_state = state; 608 } 609 610 void 611 Thread::WillStop() 612 { 613 ThreadPlan *current_plan = GetCurrentPlan(); 614 615 // FIXME: I may decide to disallow threads with no plans. In which 616 // case this should go to an assert. 617 618 if (!current_plan) 619 return; 620 621 current_plan->WillStop(); 622 } 623 624 void 625 Thread::SetupForResume () 626 { 627 if (GetResumeState() != eStateSuspended) 628 { 629 630 // If we're at a breakpoint push the step-over breakpoint plan. Do this before 631 // telling the current plan it will resume, since we might change what the current 632 // plan is. 633 634 // StopReason stop_reason = lldb::eStopReasonInvalid; 635 // StopInfoSP stop_info_sp = GetStopInfo(); 636 // if (stop_info_sp.get()) 637 // stop_reason = stop_info_sp->GetStopReason(); 638 // if (stop_reason == lldb::eStopReasonBreakpoint) 639 lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); 640 if (reg_ctx_sp) 641 { 642 BreakpointSiteSP bp_site_sp = GetProcess()->GetBreakpointSiteList().FindByAddress(reg_ctx_sp->GetPC()); 643 if (bp_site_sp) 644 { 645 // Note, don't assume there's a ThreadPlanStepOverBreakpoint, the target may not require anything 646 // special to step over a breakpoint. 647 648 ThreadPlan *cur_plan = GetCurrentPlan(); 649 650 if (cur_plan->GetKind() != ThreadPlan::eKindStepOverBreakpoint) 651 { 652 ThreadPlanStepOverBreakpoint *step_bp_plan = new ThreadPlanStepOverBreakpoint (*this); 653 if (step_bp_plan) 654 { 655 ThreadPlanSP step_bp_plan_sp; 656 step_bp_plan->SetPrivate (true); 657 658 if (GetCurrentPlan()->RunState() != eStateStepping) 659 { 660 step_bp_plan->SetAutoContinue(true); 661 } 662 step_bp_plan_sp.reset (step_bp_plan); 663 QueueThreadPlan (step_bp_plan_sp, false); 664 } 665 } 666 } 667 } 668 } 669 } 670 671 bool 672 Thread::ShouldResume (StateType resume_state) 673 { 674 // At this point clear the completed plan stack. 675 m_completed_plan_stack.clear(); 676 m_discarded_plan_stack.clear(); 677 m_override_should_notify = eLazyBoolCalculate; 678 679 m_temporary_resume_state = resume_state; 680 681 lldb::ThreadSP backing_thread_sp (GetBackingThread ()); 682 if (backing_thread_sp) 683 backing_thread_sp->m_temporary_resume_state = resume_state; 684 685 // Make sure m_stop_info_sp is valid 686 GetPrivateStopInfo(); 687 688 // This is a little dubious, but we are trying to limit how often we actually fetch stop info from 689 // the target, 'cause that slows down single stepping. So assume that if we got to the point where 690 // we're about to resume, and we haven't yet had to fetch the stop reason, then it doesn't need to know 691 // about the fact that we are resuming... 692 const uint32_t process_stop_id = GetProcess()->GetStopID(); 693 if (m_stop_info_stop_id == process_stop_id && 694 (m_stop_info_sp && m_stop_info_sp->IsValid())) 695 { 696 StopInfo *stop_info = GetPrivateStopInfo().get(); 697 if (stop_info) 698 stop_info->WillResume (resume_state); 699 } 700 701 // Tell all the plans that we are about to resume in case they need to clear any state. 702 // We distinguish between the plan on the top of the stack and the lower 703 // plans in case a plan needs to do any special business before it runs. 704 705 bool need_to_resume = false; 706 ThreadPlan *plan_ptr = GetCurrentPlan(); 707 if (plan_ptr) 708 { 709 need_to_resume = plan_ptr->WillResume(resume_state, true); 710 711 while ((plan_ptr = GetPreviousPlan(plan_ptr)) != NULL) 712 { 713 plan_ptr->WillResume (resume_state, false); 714 } 715 716 // If the WillResume for the plan says we are faking a resume, then it will have set an appropriate stop info. 717 // In that case, don't reset it here. 718 719 if (need_to_resume && resume_state != eStateSuspended) 720 { 721 m_stop_info_sp.reset(); 722 } 723 } 724 725 if (need_to_resume) 726 { 727 ClearStackFrames(); 728 // Let Thread subclasses do any special work they need to prior to resuming 729 WillResume (resume_state); 730 } 731 732 return need_to_resume; 733 } 734 735 void 736 Thread::DidResume () 737 { 738 SetResumeSignal (LLDB_INVALID_SIGNAL_NUMBER); 739 } 740 741 void 742 Thread::DidStop () 743 { 744 SetState (eStateStopped); 745 } 746 747 bool 748 Thread::ShouldStop (Event* event_ptr) 749 { 750 ThreadPlan *current_plan = GetCurrentPlan(); 751 752 bool should_stop = true; 753 754 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 755 756 if (GetResumeState () == eStateSuspended) 757 { 758 if (log) 759 log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", should_stop = 0 (ignore since thread was suspended)", 760 __FUNCTION__, GetID (), GetProtocolID()); 761 return false; 762 } 763 764 if (GetTemporaryResumeState () == eStateSuspended) 765 { 766 if (log) 767 log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", should_stop = 0 (ignore since thread was suspended)", 768 __FUNCTION__, GetID (), GetProtocolID()); 769 return false; 770 } 771 772 // Based on the current thread plan and process stop info, check if this 773 // thread caused the process to stop. NOTE: this must take place before 774 // the plan is moved from the current plan stack to the completed plan 775 // stack. 776 if (ThreadStoppedForAReason() == false) 777 { 778 if (log) 779 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)", 780 __FUNCTION__, GetID (), GetProtocolID(), 781 GetRegisterContext() ? GetRegisterContext()->GetPC() : LLDB_INVALID_ADDRESS); 782 return false; 783 } 784 785 if (log) 786 { 787 log->Printf ("Thread::%s(%p) for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", pc = 0x%16.16" PRIx64, 788 __FUNCTION__, static_cast<void*>(this), GetID (), 789 GetProtocolID (), 790 GetRegisterContext() 791 ? GetRegisterContext()->GetPC() 792 : LLDB_INVALID_ADDRESS); 793 log->Printf ("^^^^^^^^ Thread::ShouldStop Begin ^^^^^^^^"); 794 StreamString s; 795 s.IndentMore(); 796 DumpThreadPlans(&s); 797 log->Printf ("Plan stack initial state:\n%s", s.GetData()); 798 } 799 800 // The top most plan always gets to do the trace log... 801 current_plan->DoTraceLog (); 802 803 // First query the stop info's ShouldStopSynchronous. This handles "synchronous" stop reasons, for example the breakpoint 804 // command on internal breakpoints. If a synchronous stop reason says we should not stop, then we don't have to 805 // do any more work on this stop. 806 StopInfoSP private_stop_info (GetPrivateStopInfo()); 807 if (private_stop_info && private_stop_info->ShouldStopSynchronous(event_ptr) == false) 808 { 809 if (log) 810 log->Printf ("StopInfo::ShouldStop async callback says we should not stop, returning ShouldStop of false."); 811 return false; 812 } 813 814 // If we've already been restarted, don't query the plans since the state they would examine is not current. 815 if (Process::ProcessEventData::GetRestartedFromEvent(event_ptr)) 816 return false; 817 818 // Before the plans see the state of the world, calculate the current inlined depth. 819 GetStackFrameList()->CalculateCurrentInlinedDepth(); 820 821 // If the base plan doesn't understand why we stopped, then we have to find a plan that does. 822 // If that plan is still working, then we don't need to do any more work. If the plan that explains 823 // the stop is done, then we should pop all the plans below it, and pop it, and then let the plans above it decide 824 // whether they still need to do more work. 825 826 bool done_processing_current_plan = false; 827 828 if (!current_plan->PlanExplainsStop(event_ptr)) 829 { 830 if (current_plan->TracerExplainsStop()) 831 { 832 done_processing_current_plan = true; 833 should_stop = false; 834 } 835 else 836 { 837 // If the current plan doesn't explain the stop, then find one that 838 // does and let it handle the situation. 839 ThreadPlan *plan_ptr = current_plan; 840 while ((plan_ptr = GetPreviousPlan(plan_ptr)) != NULL) 841 { 842 if (plan_ptr->PlanExplainsStop(event_ptr)) 843 { 844 should_stop = plan_ptr->ShouldStop (event_ptr); 845 846 // plan_ptr explains the stop, next check whether plan_ptr is done, if so, then we should take it 847 // and all the plans below it off the stack. 848 849 if (plan_ptr->MischiefManaged()) 850 { 851 // We're going to pop the plans up to and including the plan that explains the stop. 852 ThreadPlan *prev_plan_ptr = GetPreviousPlan (plan_ptr); 853 854 do 855 { 856 if (should_stop) 857 current_plan->WillStop(); 858 PopPlan(); 859 } 860 while ((current_plan = GetCurrentPlan()) != prev_plan_ptr); 861 // Now, if the responsible plan was not "Okay to discard" then we're done, 862 // otherwise we forward this to the next plan in the stack below. 863 if (plan_ptr->IsMasterPlan() && !plan_ptr->OkayToDiscard()) 864 done_processing_current_plan = true; 865 else 866 done_processing_current_plan = false; 867 } 868 else 869 done_processing_current_plan = true; 870 871 break; 872 } 873 874 } 875 } 876 } 877 878 if (!done_processing_current_plan) 879 { 880 bool over_ride_stop = current_plan->ShouldAutoContinue(event_ptr); 881 882 if (log) 883 log->Printf("Plan %s explains stop, auto-continue %i.", 884 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.", 905 current_plan->GetName(), should_stop); 906 if (current_plan->MischiefManaged()) 907 { 908 if (should_stop) 909 current_plan->WillStop(); 910 911 // If a Master Plan wants to stop, and wants to stick on the stack, we let it. 912 // Otherwise, see if the plan's parent wants to stop. 913 914 if (should_stop && current_plan->IsMasterPlan() && !current_plan->OkayToDiscard()) 915 { 916 PopPlan(); 917 break; 918 } 919 else 920 { 921 922 PopPlan(); 923 924 current_plan = GetCurrentPlan(); 925 if (current_plan == NULL) 926 { 927 break; 928 } 929 } 930 } 931 else 932 { 933 break; 934 } 935 } 936 } 937 938 if (over_ride_stop) 939 should_stop = false; 940 941 // One other potential problem is that we set up a master plan, then stop in before it is complete - for instance 942 // by hitting a breakpoint during a step-over - then do some step/finish/etc operations that wind up 943 // past the end point condition of the initial plan. We don't want to strand the original plan on the stack, 944 // This code clears stale plans off the stack. 945 946 if (should_stop) 947 { 948 ThreadPlan *plan_ptr = GetCurrentPlan(); 949 while (!PlanIsBasePlan(plan_ptr)) 950 { 951 bool stale = plan_ptr->IsPlanStale (); 952 ThreadPlan *examined_plan = plan_ptr; 953 plan_ptr = GetPreviousPlan (examined_plan); 954 955 if (stale) 956 { 957 if (log) 958 log->Printf("Plan %s being discarded in cleanup, it says it is already done.", 959 examined_plan->GetName()); 960 DiscardThreadPlansUpToPlan(examined_plan); 961 } 962 } 963 } 964 965 } 966 967 if (log) 968 { 969 StreamString s; 970 s.IndentMore(); 971 DumpThreadPlans(&s); 972 log->Printf ("Plan stack final state:\n%s", s.GetData()); 973 log->Printf ("vvvvvvvv Thread::ShouldStop End (returning %i) vvvvvvvv", should_stop); 974 } 975 return should_stop; 976 } 977 978 Vote 979 Thread::ShouldReportStop (Event* event_ptr) 980 { 981 StateType thread_state = GetResumeState (); 982 StateType temp_thread_state = GetTemporaryResumeState(); 983 984 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 985 986 if (thread_state == eStateSuspended || thread_state == eStateInvalid) 987 { 988 if (log) 989 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (state was suspended or invalid)", GetID(), eVoteNoOpinion); 990 return eVoteNoOpinion; 991 } 992 993 if (temp_thread_state == eStateSuspended || temp_thread_state == eStateInvalid) 994 { 995 if (log) 996 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (temporary state was suspended or invalid)", GetID(), eVoteNoOpinion); 997 return eVoteNoOpinion; 998 } 999 1000 if (!ThreadStoppedForAReason()) 1001 { 1002 if (log) 1003 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (thread didn't stop for a reason.)", GetID(), eVoteNoOpinion); 1004 return eVoteNoOpinion; 1005 } 1006 1007 if (m_completed_plan_stack.size() > 0) 1008 { 1009 // Don't use GetCompletedPlan here, since that suppresses private plans. 1010 if (log) 1011 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote for complete stack's back plan", GetID()); 1012 return m_completed_plan_stack.back()->ShouldReportStop (event_ptr); 1013 } 1014 else 1015 { 1016 Vote thread_vote = eVoteNoOpinion; 1017 ThreadPlan *plan_ptr = GetCurrentPlan(); 1018 while (1) 1019 { 1020 if (plan_ptr->PlanExplainsStop(event_ptr)) 1021 { 1022 thread_vote = plan_ptr->ShouldReportStop(event_ptr); 1023 break; 1024 } 1025 if (PlanIsBasePlan(plan_ptr)) 1026 break; 1027 else 1028 plan_ptr = GetPreviousPlan(plan_ptr); 1029 } 1030 if (log) 1031 log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i for current plan", GetID(), thread_vote); 1032 1033 return thread_vote; 1034 } 1035 } 1036 1037 Vote 1038 Thread::ShouldReportRun (Event* event_ptr) 1039 { 1040 StateType thread_state = GetResumeState (); 1041 1042 if (thread_state == eStateSuspended 1043 || thread_state == eStateInvalid) 1044 { 1045 return eVoteNoOpinion; 1046 } 1047 1048 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1049 if (m_completed_plan_stack.size() > 0) 1050 { 1051 // Don't use GetCompletedPlan here, since that suppresses private plans. 1052 if (log) 1053 log->Printf ("Current Plan for thread %d(%p) (0x%4.4" PRIx64 ", %s): %s being asked whether we should report run.", 1054 GetIndexID(), static_cast<void*>(this), 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(), static_cast<void*>(this), GetID(), 1065 StateAsCString(GetTemporaryResumeState()), 1066 GetCurrentPlan()->GetName()); 1067 1068 return GetCurrentPlan()->ShouldReportRun (event_ptr); 1069 } 1070 } 1071 1072 bool 1073 Thread::MatchesSpec (const ThreadSpec *spec) 1074 { 1075 if (spec == NULL) 1076 return true; 1077 1078 return spec->ThreadPassesBasicTests(*this); 1079 } 1080 1081 void 1082 Thread::PushPlan (ThreadPlanSP &thread_plan_sp) 1083 { 1084 if (thread_plan_sp) 1085 { 1086 // If the thread plan doesn't already have a tracer, give it its parent's tracer: 1087 if (!thread_plan_sp->GetThreadPlanTracer()) 1088 thread_plan_sp->SetThreadPlanTracer(m_plan_stack.back()->GetThreadPlanTracer()); 1089 m_plan_stack.push_back (thread_plan_sp); 1090 1091 thread_plan_sp->DidPush(); 1092 1093 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1094 if (log) 1095 { 1096 StreamString s; 1097 thread_plan_sp->GetDescription (&s, lldb::eDescriptionLevelFull); 1098 log->Printf("Thread::PushPlan(0x%p): \"%s\", tid = 0x%4.4" PRIx64 ".", 1099 static_cast<void*>(this), s.GetData(), 1100 thread_plan_sp->GetThread().GetID()); 1101 } 1102 } 1103 } 1104 1105 void 1106 Thread::PopPlan () 1107 { 1108 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1109 1110 if (m_plan_stack.size() <= 1) 1111 return; 1112 else 1113 { 1114 ThreadPlanSP &plan = m_plan_stack.back(); 1115 if (log) 1116 { 1117 log->Printf("Popping plan: \"%s\", tid = 0x%4.4" PRIx64 ".", plan->GetName(), plan->GetThread().GetID()); 1118 } 1119 m_completed_plan_stack.push_back (plan); 1120 plan->WillPop(); 1121 m_plan_stack.pop_back(); 1122 } 1123 } 1124 1125 void 1126 Thread::DiscardPlan () 1127 { 1128 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1129 if (m_plan_stack.size() > 1) 1130 { 1131 ThreadPlanSP &plan = m_plan_stack.back(); 1132 if (log) 1133 log->Printf("Discarding plan: \"%s\", tid = 0x%4.4" PRIx64 ".", plan->GetName(), plan->GetThread().GetID()); 1134 1135 m_discarded_plan_stack.push_back (plan); 1136 plan->WillPop(); 1137 m_plan_stack.pop_back(); 1138 } 1139 } 1140 1141 ThreadPlan * 1142 Thread::GetCurrentPlan () 1143 { 1144 // There will always be at least the base plan. If somebody is mucking with a 1145 // thread with an empty plan stack, we should assert right away. 1146 if (m_plan_stack.empty()) 1147 return NULL; 1148 return m_plan_stack.back().get(); 1149 } 1150 1151 ThreadPlanSP 1152 Thread::GetCompletedPlan () 1153 { 1154 ThreadPlanSP empty_plan_sp; 1155 if (!m_completed_plan_stack.empty()) 1156 { 1157 for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) 1158 { 1159 ThreadPlanSP completed_plan_sp; 1160 completed_plan_sp = m_completed_plan_stack[i]; 1161 if (!completed_plan_sp->GetPrivate ()) 1162 return completed_plan_sp; 1163 } 1164 } 1165 return empty_plan_sp; 1166 } 1167 1168 ValueObjectSP 1169 Thread::GetReturnValueObject () 1170 { 1171 if (!m_completed_plan_stack.empty()) 1172 { 1173 for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) 1174 { 1175 ValueObjectSP return_valobj_sp; 1176 return_valobj_sp = m_completed_plan_stack[i]->GetReturnValueObject(); 1177 if (return_valobj_sp) 1178 return return_valobj_sp; 1179 } 1180 } 1181 return ValueObjectSP(); 1182 } 1183 1184 bool 1185 Thread::IsThreadPlanDone (ThreadPlan *plan) 1186 { 1187 if (!m_completed_plan_stack.empty()) 1188 { 1189 for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) 1190 { 1191 if (m_completed_plan_stack[i].get() == plan) 1192 return true; 1193 } 1194 } 1195 return false; 1196 } 1197 1198 bool 1199 Thread::WasThreadPlanDiscarded (ThreadPlan *plan) 1200 { 1201 if (!m_discarded_plan_stack.empty()) 1202 { 1203 for (int i = m_discarded_plan_stack.size() - 1; i >= 0; i--) 1204 { 1205 if (m_discarded_plan_stack[i].get() == plan) 1206 return true; 1207 } 1208 } 1209 return false; 1210 } 1211 1212 ThreadPlan * 1213 Thread::GetPreviousPlan (ThreadPlan *current_plan) 1214 { 1215 if (current_plan == NULL) 1216 return NULL; 1217 1218 int stack_size = m_completed_plan_stack.size(); 1219 for (int i = stack_size - 1; i > 0; i--) 1220 { 1221 if (current_plan == m_completed_plan_stack[i].get()) 1222 return m_completed_plan_stack[i-1].get(); 1223 } 1224 1225 if (stack_size > 0 && m_completed_plan_stack[0].get() == current_plan) 1226 { 1227 if (m_plan_stack.size() > 0) 1228 return m_plan_stack.back().get(); 1229 else 1230 return NULL; 1231 } 1232 1233 stack_size = m_plan_stack.size(); 1234 for (int i = stack_size - 1; i > 0; i--) 1235 { 1236 if (current_plan == m_plan_stack[i].get()) 1237 return m_plan_stack[i-1].get(); 1238 } 1239 return NULL; 1240 } 1241 1242 void 1243 Thread::QueueThreadPlan (ThreadPlanSP &thread_plan_sp, bool abort_other_plans) 1244 { 1245 if (abort_other_plans) 1246 DiscardThreadPlans(true); 1247 1248 PushPlan (thread_plan_sp); 1249 } 1250 1251 1252 void 1253 Thread::EnableTracer (bool value, bool single_stepping) 1254 { 1255 int stack_size = m_plan_stack.size(); 1256 for (int i = 0; i < stack_size; i++) 1257 { 1258 if (m_plan_stack[i]->GetThreadPlanTracer()) 1259 { 1260 m_plan_stack[i]->GetThreadPlanTracer()->EnableTracing(value); 1261 m_plan_stack[i]->GetThreadPlanTracer()->EnableSingleStep(single_stepping); 1262 } 1263 } 1264 } 1265 1266 void 1267 Thread::SetTracer (lldb::ThreadPlanTracerSP &tracer_sp) 1268 { 1269 int stack_size = m_plan_stack.size(); 1270 for (int i = 0; i < stack_size; i++) 1271 m_plan_stack[i]->SetThreadPlanTracer(tracer_sp); 1272 } 1273 1274 void 1275 Thread::DiscardThreadPlansUpToPlan (lldb::ThreadPlanSP &up_to_plan_sp) 1276 { 1277 DiscardThreadPlansUpToPlan (up_to_plan_sp.get()); 1278 } 1279 1280 void 1281 Thread::DiscardThreadPlansUpToPlan (ThreadPlan *up_to_plan_ptr) 1282 { 1283 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1284 if (log) 1285 log->Printf("Discarding thread plans for thread tid = 0x%4.4" PRIx64 ", up to %p", 1286 GetID(), static_cast<void*>(up_to_plan_ptr)); 1287 1288 int stack_size = m_plan_stack.size(); 1289 1290 // If the input plan is NULL, discard all plans. Otherwise make sure this plan is in the 1291 // stack, and if so discard up to and including it. 1292 1293 if (up_to_plan_ptr == NULL) 1294 { 1295 for (int i = stack_size - 1; i > 0; i--) 1296 DiscardPlan(); 1297 } 1298 else 1299 { 1300 bool found_it = false; 1301 for (int i = stack_size - 1; i > 0; i--) 1302 { 1303 if (m_plan_stack[i].get() == up_to_plan_ptr) 1304 found_it = true; 1305 } 1306 if (found_it) 1307 { 1308 bool last_one = false; 1309 for (int i = stack_size - 1; i > 0 && !last_one ; i--) 1310 { 1311 if (GetCurrentPlan() == up_to_plan_ptr) 1312 last_one = true; 1313 DiscardPlan(); 1314 } 1315 } 1316 } 1317 return; 1318 } 1319 1320 void 1321 Thread::DiscardThreadPlans(bool force) 1322 { 1323 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1324 if (log) 1325 { 1326 log->Printf("Discarding thread plans for thread (tid = 0x%4.4" PRIx64 ", force %d)", GetID(), force); 1327 } 1328 1329 if (force) 1330 { 1331 int stack_size = m_plan_stack.size(); 1332 for (int i = stack_size - 1; i > 0; i--) 1333 { 1334 DiscardPlan(); 1335 } 1336 return; 1337 } 1338 1339 while (1) 1340 { 1341 1342 int master_plan_idx; 1343 bool discard = true; 1344 1345 // Find the first master plan, see if it wants discarding, and if yes discard up to it. 1346 for (master_plan_idx = m_plan_stack.size() - 1; master_plan_idx >= 0; master_plan_idx--) 1347 { 1348 if (m_plan_stack[master_plan_idx]->IsMasterPlan()) 1349 { 1350 discard = m_plan_stack[master_plan_idx]->OkayToDiscard(); 1351 break; 1352 } 1353 } 1354 1355 if (discard) 1356 { 1357 // First pop all the dependent plans: 1358 for (int i = m_plan_stack.size() - 1; i > master_plan_idx; i--) 1359 { 1360 1361 // FIXME: Do we need a finalize here, or is the rule that "PrepareForStop" 1362 // for the plan leaves it in a state that it is safe to pop the plan 1363 // with no more notice? 1364 DiscardPlan(); 1365 } 1366 1367 // Now discard the master plan itself. 1368 // The bottom-most plan never gets discarded. "OkayToDiscard" for it means 1369 // discard it's dependent plans, but not it... 1370 if (master_plan_idx > 0) 1371 { 1372 DiscardPlan(); 1373 } 1374 } 1375 else 1376 { 1377 // If the master plan doesn't want to get discarded, then we're done. 1378 break; 1379 } 1380 1381 } 1382 } 1383 1384 bool 1385 Thread::PlanIsBasePlan (ThreadPlan *plan_ptr) 1386 { 1387 if (plan_ptr->IsBasePlan()) 1388 return true; 1389 else if (m_plan_stack.size() == 0) 1390 return false; 1391 else 1392 return m_plan_stack[0].get() == plan_ptr; 1393 } 1394 1395 Error 1396 Thread::UnwindInnermostExpression() 1397 { 1398 Error error; 1399 int stack_size = m_plan_stack.size(); 1400 1401 // If the input plan is NULL, discard all plans. Otherwise make sure this plan is in the 1402 // stack, and if so discard up to and including it. 1403 1404 for (int i = stack_size - 1; i > 0; i--) 1405 { 1406 if (m_plan_stack[i]->GetKind() == ThreadPlan::eKindCallFunction) 1407 { 1408 DiscardThreadPlansUpToPlan(m_plan_stack[i].get()); 1409 return error; 1410 } 1411 } 1412 error.SetErrorString("No expressions currently active on this thread"); 1413 return error; 1414 } 1415 1416 1417 ThreadPlanSP 1418 Thread::QueueFundamentalPlan (bool abort_other_plans) 1419 { 1420 ThreadPlanSP thread_plan_sp (new ThreadPlanBase(*this)); 1421 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1422 return thread_plan_sp; 1423 } 1424 1425 ThreadPlanSP 1426 Thread::QueueThreadPlanForStepSingleInstruction 1427 ( 1428 bool step_over, 1429 bool abort_other_plans, 1430 bool stop_other_threads 1431 ) 1432 { 1433 ThreadPlanSP thread_plan_sp (new ThreadPlanStepInstruction (*this, step_over, stop_other_threads, eVoteNoOpinion, eVoteNoOpinion)); 1434 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1435 return thread_plan_sp; 1436 } 1437 1438 ThreadPlanSP 1439 Thread::QueueThreadPlanForStepOverRange 1440 ( 1441 bool abort_other_plans, 1442 const AddressRange &range, 1443 const SymbolContext &addr_context, 1444 lldb::RunMode stop_other_threads, 1445 LazyBool step_out_avoids_code_withoug_debug_info 1446 ) 1447 { 1448 ThreadPlanSP thread_plan_sp; 1449 thread_plan_sp.reset (new ThreadPlanStepOverRange (*this, range, addr_context, stop_other_threads, step_out_avoids_code_withoug_debug_info)); 1450 1451 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1452 return thread_plan_sp; 1453 } 1454 1455 ThreadPlanSP 1456 Thread::QueueThreadPlanForStepInRange 1457 ( 1458 bool abort_other_plans, 1459 const AddressRange &range, 1460 const SymbolContext &addr_context, 1461 const char *step_in_target, 1462 lldb::RunMode stop_other_threads, 1463 LazyBool step_in_avoids_code_without_debug_info, 1464 LazyBool step_out_avoids_code_without_debug_info 1465 ) 1466 { 1467 ThreadPlanSP thread_plan_sp; 1468 ThreadPlanStepInRange *plan = new ThreadPlanStepInRange (*this, 1469 range, 1470 addr_context, 1471 stop_other_threads, 1472 step_in_avoids_code_without_debug_info, 1473 step_out_avoids_code_without_debug_info); 1474 1475 if (step_in_target) 1476 plan->SetStepInTarget(step_in_target); 1477 1478 thread_plan_sp.reset (plan); 1479 1480 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1481 return thread_plan_sp; 1482 } 1483 1484 1485 ThreadPlanSP 1486 Thread::QueueThreadPlanForStepOut 1487 ( 1488 bool abort_other_plans, 1489 SymbolContext *addr_context, 1490 bool first_insn, 1491 bool stop_other_threads, 1492 Vote stop_vote, 1493 Vote run_vote, 1494 uint32_t frame_idx, 1495 LazyBool step_out_avoids_code_withoug_debug_info 1496 ) 1497 { 1498 ThreadPlanSP thread_plan_sp (new ThreadPlanStepOut (*this, 1499 addr_context, 1500 first_insn, 1501 stop_other_threads, 1502 stop_vote, 1503 run_vote, 1504 frame_idx, 1505 step_out_avoids_code_withoug_debug_info)); 1506 1507 if (thread_plan_sp->ValidatePlan(NULL)) 1508 { 1509 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1510 return thread_plan_sp; 1511 } 1512 else 1513 { 1514 return ThreadPlanSP(); 1515 } 1516 } 1517 1518 ThreadPlanSP 1519 Thread::QueueThreadPlanForStepOutNoShouldStop 1520 ( 1521 bool abort_other_plans, 1522 SymbolContext *addr_context, 1523 bool first_insn, 1524 bool stop_other_threads, 1525 Vote stop_vote, 1526 Vote run_vote, 1527 uint32_t frame_idx 1528 ) 1529 { 1530 ThreadPlanStepOut *new_plan = new ThreadPlanStepOut (*this, 1531 addr_context, 1532 first_insn, 1533 stop_other_threads, 1534 stop_vote, 1535 run_vote, 1536 frame_idx, 1537 eLazyBoolNo); 1538 new_plan->ClearShouldStopHereCallbacks(); 1539 ThreadPlanSP thread_plan_sp(new_plan); 1540 1541 if (thread_plan_sp->ValidatePlan(NULL)) 1542 { 1543 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1544 return thread_plan_sp; 1545 } 1546 else 1547 { 1548 return ThreadPlanSP(); 1549 } 1550 } 1551 1552 ThreadPlanSP 1553 Thread::QueueThreadPlanForStepThrough (StackID &return_stack_id, bool abort_other_plans, bool stop_other_threads) 1554 { 1555 ThreadPlanSP thread_plan_sp(new ThreadPlanStepThrough (*this, return_stack_id, stop_other_threads)); 1556 if (!thread_plan_sp || !thread_plan_sp->ValidatePlan (NULL)) 1557 return ThreadPlanSP(); 1558 1559 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1560 return thread_plan_sp; 1561 } 1562 1563 ThreadPlanSP 1564 Thread::QueueThreadPlanForRunToAddress (bool abort_other_plans, 1565 Address &target_addr, 1566 bool stop_other_threads) 1567 { 1568 ThreadPlanSP thread_plan_sp (new ThreadPlanRunToAddress (*this, target_addr, stop_other_threads)); 1569 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1570 return thread_plan_sp; 1571 } 1572 1573 ThreadPlanSP 1574 Thread::QueueThreadPlanForStepUntil (bool abort_other_plans, 1575 lldb::addr_t *address_list, 1576 size_t num_addresses, 1577 bool stop_other_threads, 1578 uint32_t frame_idx) 1579 { 1580 ThreadPlanSP thread_plan_sp (new ThreadPlanStepUntil (*this, address_list, num_addresses, stop_other_threads, frame_idx)); 1581 QueueThreadPlan (thread_plan_sp, abort_other_plans); 1582 return thread_plan_sp; 1583 1584 } 1585 1586 uint32_t 1587 Thread::GetIndexID () const 1588 { 1589 return m_index_id; 1590 } 1591 1592 void 1593 Thread::DumpThreadPlans (lldb_private::Stream *s) const 1594 { 1595 uint32_t stack_size = m_plan_stack.size(); 1596 int i; 1597 s->Indent(); 1598 s->Printf ("Plan Stack for thread #%u: tid = 0x%4.4" PRIx64 ", stack_size = %d\n", GetIndexID(), GetID(), stack_size); 1599 for (i = stack_size - 1; i >= 0; i--) 1600 { 1601 s->IndentMore(); 1602 s->Indent(); 1603 s->Printf ("Element %d: ", i); 1604 m_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); 1605 s->EOL(); 1606 s->IndentLess(); 1607 } 1608 1609 stack_size = m_completed_plan_stack.size(); 1610 if (stack_size > 0) 1611 { 1612 s->Indent(); 1613 s->Printf ("Completed Plan Stack: %d elements.\n", stack_size); 1614 for (i = stack_size - 1; i >= 0; i--) 1615 { 1616 s->IndentMore(); 1617 s->Indent(); 1618 s->Printf ("Element %d: ", i); 1619 m_completed_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); 1620 s->EOL(); 1621 s->IndentLess(); 1622 } 1623 } 1624 1625 stack_size = m_discarded_plan_stack.size(); 1626 if (stack_size > 0) 1627 { 1628 s->Indent(); 1629 s->Printf ("Discarded Plan Stack: %d elements.\n", stack_size); 1630 for (i = stack_size - 1; i >= 0; i--) 1631 { 1632 s->IndentMore(); 1633 s->Indent(); 1634 s->Printf ("Element %d: ", i); 1635 m_discarded_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); 1636 s->EOL(); 1637 s->IndentLess(); 1638 } 1639 } 1640 1641 } 1642 1643 TargetSP 1644 Thread::CalculateTarget () 1645 { 1646 TargetSP target_sp; 1647 ProcessSP process_sp(GetProcess()); 1648 if (process_sp) 1649 target_sp = process_sp->CalculateTarget(); 1650 return target_sp; 1651 1652 } 1653 1654 ProcessSP 1655 Thread::CalculateProcess () 1656 { 1657 return GetProcess(); 1658 } 1659 1660 ThreadSP 1661 Thread::CalculateThread () 1662 { 1663 return shared_from_this(); 1664 } 1665 1666 StackFrameSP 1667 Thread::CalculateStackFrame () 1668 { 1669 return StackFrameSP(); 1670 } 1671 1672 void 1673 Thread::CalculateExecutionContext (ExecutionContext &exe_ctx) 1674 { 1675 exe_ctx.SetContext (shared_from_this()); 1676 } 1677 1678 1679 StackFrameListSP 1680 Thread::GetStackFrameList () 1681 { 1682 StackFrameListSP frame_list_sp; 1683 Mutex::Locker locker(m_frame_mutex); 1684 if (m_curr_frames_sp) 1685 { 1686 frame_list_sp = m_curr_frames_sp; 1687 } 1688 else 1689 { 1690 frame_list_sp.reset(new StackFrameList (*this, m_prev_frames_sp, true)); 1691 m_curr_frames_sp = frame_list_sp; 1692 } 1693 return frame_list_sp; 1694 } 1695 1696 void 1697 Thread::ClearStackFrames () 1698 { 1699 Mutex::Locker locker(m_frame_mutex); 1700 1701 Unwind *unwinder = GetUnwinder (); 1702 if (unwinder) 1703 unwinder->Clear(); 1704 1705 // Only store away the old "reference" StackFrameList if we got all its frames: 1706 // FIXME: At some point we can try to splice in the frames we have fetched into 1707 // the new frame as we make it, but let's not try that now. 1708 if (m_curr_frames_sp && m_curr_frames_sp->GetAllFramesFetched()) 1709 m_prev_frames_sp.swap (m_curr_frames_sp); 1710 m_curr_frames_sp.reset(); 1711 } 1712 1713 lldb::StackFrameSP 1714 Thread::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) 1715 { 1716 return GetStackFrameList()->GetFrameWithConcreteFrameIndex (unwind_idx); 1717 } 1718 1719 1720 Error 1721 Thread::ReturnFromFrameWithIndex (uint32_t frame_idx, lldb::ValueObjectSP return_value_sp, bool broadcast) 1722 { 1723 StackFrameSP frame_sp = GetStackFrameAtIndex (frame_idx); 1724 Error return_error; 1725 1726 if (!frame_sp) 1727 { 1728 return_error.SetErrorStringWithFormat("Could not find frame with index %d in thread 0x%" PRIx64 ".", frame_idx, GetID()); 1729 } 1730 1731 return ReturnFromFrame(frame_sp, return_value_sp, broadcast); 1732 } 1733 1734 Error 1735 Thread::ReturnFromFrame (lldb::StackFrameSP frame_sp, lldb::ValueObjectSP return_value_sp, bool broadcast) 1736 { 1737 Error return_error; 1738 1739 if (!frame_sp) 1740 { 1741 return_error.SetErrorString("Can't return to a null frame."); 1742 return return_error; 1743 } 1744 1745 Thread *thread = frame_sp->GetThread().get(); 1746 uint32_t older_frame_idx = frame_sp->GetFrameIndex() + 1; 1747 StackFrameSP older_frame_sp = thread->GetStackFrameAtIndex(older_frame_idx); 1748 if (!older_frame_sp) 1749 { 1750 return_error.SetErrorString("No older frame to return to."); 1751 return return_error; 1752 } 1753 1754 if (return_value_sp) 1755 { 1756 lldb::ABISP abi = thread->GetProcess()->GetABI(); 1757 if (!abi) 1758 { 1759 return_error.SetErrorString("Could not find ABI to set return value."); 1760 return return_error; 1761 } 1762 SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextFunction); 1763 1764 // FIXME: ValueObject::Cast doesn't currently work correctly, at least not for scalars. 1765 // Turn that back on when that works. 1766 if (0 && sc.function != NULL) 1767 { 1768 Type *function_type = sc.function->GetType(); 1769 if (function_type) 1770 { 1771 ClangASTType return_type = sc.function->GetClangType().GetFunctionReturnType(); 1772 if (return_type) 1773 { 1774 StreamString s; 1775 return_type.DumpTypeDescription(&s); 1776 ValueObjectSP cast_value_sp = return_value_sp->Cast(return_type); 1777 if (cast_value_sp) 1778 { 1779 cast_value_sp->SetFormat(eFormatHex); 1780 return_value_sp = cast_value_sp; 1781 } 1782 } 1783 } 1784 } 1785 1786 return_error = abi->SetReturnValueObject(older_frame_sp, return_value_sp); 1787 if (!return_error.Success()) 1788 return return_error; 1789 } 1790 1791 // Now write the return registers for the chosen frame: 1792 // Note, we can't use ReadAllRegisterValues->WriteAllRegisterValues, since the read & write 1793 // cook their data 1794 1795 StackFrameSP youngest_frame_sp = thread->GetStackFrameAtIndex(0); 1796 if (youngest_frame_sp) 1797 { 1798 lldb::RegisterContextSP reg_ctx_sp (youngest_frame_sp->GetRegisterContext()); 1799 if (reg_ctx_sp) 1800 { 1801 bool copy_success = reg_ctx_sp->CopyFromRegisterContext(older_frame_sp->GetRegisterContext()); 1802 if (copy_success) 1803 { 1804 thread->DiscardThreadPlans(true); 1805 thread->ClearStackFrames(); 1806 if (broadcast && EventTypeHasListeners(eBroadcastBitStackChanged)) 1807 BroadcastEvent(eBroadcastBitStackChanged, new ThreadEventData (this->shared_from_this())); 1808 } 1809 else 1810 { 1811 return_error.SetErrorString("Could not reset register values."); 1812 } 1813 } 1814 else 1815 { 1816 return_error.SetErrorString("Frame has no register context."); 1817 } 1818 } 1819 else 1820 { 1821 return_error.SetErrorString("Returned past top frame."); 1822 } 1823 return return_error; 1824 } 1825 1826 static void DumpAddressList (Stream &s, const std::vector<Address> &list, ExecutionContextScope *exe_scope) 1827 { 1828 for (size_t n=0;n<list.size();n++) 1829 { 1830 s << "\t"; 1831 list[n].Dump (&s, exe_scope, Address::DumpStyleResolvedDescription, Address::DumpStyleSectionNameOffset); 1832 s << "\n"; 1833 } 1834 } 1835 1836 Error 1837 Thread::JumpToLine (const FileSpec &file, uint32_t line, bool can_leave_function, std::string *warnings) 1838 { 1839 ExecutionContext exe_ctx (GetStackFrameAtIndex(0)); 1840 Target *target = exe_ctx.GetTargetPtr(); 1841 TargetSP target_sp = exe_ctx.GetTargetSP(); 1842 RegisterContext *reg_ctx = exe_ctx.GetRegisterContext(); 1843 StackFrame *frame = exe_ctx.GetFramePtr(); 1844 const SymbolContext &sc = frame->GetSymbolContext(eSymbolContextFunction); 1845 1846 // Find candidate locations. 1847 std::vector<Address> candidates, within_function, outside_function; 1848 target->GetImages().FindAddressesForLine (target_sp, file, line, sc.function, within_function, outside_function); 1849 1850 // If possible, we try and stay within the current function. 1851 // Within a function, we accept multiple locations (optimized code may do this, 1852 // there's no solution here so we do the best we can). 1853 // However if we're trying to leave the function, we don't know how to pick the 1854 // right location, so if there's more than one then we bail. 1855 if (!within_function.empty()) 1856 candidates = within_function; 1857 else if (outside_function.size() == 1 && can_leave_function) 1858 candidates = outside_function; 1859 1860 // Check if we got anything. 1861 if (candidates.empty()) 1862 { 1863 if (outside_function.empty()) 1864 { 1865 return Error("Cannot locate an address for %s:%i.", 1866 file.GetFilename().AsCString(), line); 1867 } 1868 else if (outside_function.size() == 1) 1869 { 1870 return Error("%s:%i is outside the current function.", 1871 file.GetFilename().AsCString(), line); 1872 } 1873 else 1874 { 1875 StreamString sstr; 1876 DumpAddressList(sstr, outside_function, target); 1877 return Error("%s:%i has multiple candidate locations:\n%s", 1878 file.GetFilename().AsCString(), line, sstr.GetString().c_str()); 1879 } 1880 } 1881 1882 // Accept the first location, warn about any others. 1883 Address dest = candidates[0]; 1884 if (warnings && candidates.size() > 1) 1885 { 1886 StreamString sstr; 1887 sstr.Printf("%s:%i appears multiple times in this function, selecting the first location:\n", 1888 file.GetFilename().AsCString(), line); 1889 DumpAddressList(sstr, candidates, target); 1890 *warnings = sstr.GetString(); 1891 } 1892 1893 if (!reg_ctx->SetPC (dest)) 1894 return Error("Cannot change PC to target address."); 1895 1896 return Error(); 1897 } 1898 1899 void 1900 Thread::DumpUsingSettingsFormat (Stream &strm, uint32_t frame_idx) 1901 { 1902 ExecutionContext exe_ctx (shared_from_this()); 1903 Process *process = exe_ctx.GetProcessPtr(); 1904 if (process == NULL) 1905 return; 1906 1907 StackFrameSP frame_sp; 1908 SymbolContext frame_sc; 1909 if (frame_idx != LLDB_INVALID_INDEX32) 1910 { 1911 frame_sp = GetStackFrameAtIndex (frame_idx); 1912 if (frame_sp) 1913 { 1914 exe_ctx.SetFrameSP(frame_sp); 1915 frame_sc = frame_sp->GetSymbolContext(eSymbolContextEverything); 1916 } 1917 } 1918 1919 const char *thread_format = exe_ctx.GetTargetRef().GetDebugger().GetThreadFormat(); 1920 assert (thread_format); 1921 Debugger::FormatPrompt (thread_format, 1922 frame_sp ? &frame_sc : NULL, 1923 &exe_ctx, 1924 NULL, 1925 strm); 1926 } 1927 1928 void 1929 Thread::SettingsInitialize () 1930 { 1931 } 1932 1933 void 1934 Thread::SettingsTerminate () 1935 { 1936 } 1937 1938 lldb::addr_t 1939 Thread::GetThreadPointer () 1940 { 1941 return LLDB_INVALID_ADDRESS; 1942 } 1943 1944 addr_t 1945 Thread::GetThreadLocalData (const ModuleSP module) 1946 { 1947 // The default implementation is to ask the dynamic loader for it. 1948 // This can be overridden for specific platforms. 1949 DynamicLoader *loader = GetProcess()->GetDynamicLoader(); 1950 if (loader) 1951 return loader->GetThreadLocalData (module, shared_from_this()); 1952 else 1953 return LLDB_INVALID_ADDRESS; 1954 } 1955 1956 lldb::StackFrameSP 1957 Thread::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) 1958 { 1959 return GetStackFrameList()->GetStackFrameSPForStackFramePtr (stack_frame_ptr); 1960 } 1961 1962 const char * 1963 Thread::StopReasonAsCString (lldb::StopReason reason) 1964 { 1965 switch (reason) 1966 { 1967 case eStopReasonInvalid: return "invalid"; 1968 case eStopReasonNone: return "none"; 1969 case eStopReasonTrace: return "trace"; 1970 case eStopReasonBreakpoint: return "breakpoint"; 1971 case eStopReasonWatchpoint: return "watchpoint"; 1972 case eStopReasonSignal: return "signal"; 1973 case eStopReasonException: return "exception"; 1974 case eStopReasonExec: return "exec"; 1975 case eStopReasonPlanComplete: return "plan complete"; 1976 case eStopReasonThreadExiting: return "thread exiting"; 1977 } 1978 1979 1980 static char unknown_state_string[64]; 1981 snprintf(unknown_state_string, sizeof (unknown_state_string), "StopReason = %i", reason); 1982 return unknown_state_string; 1983 } 1984 1985 const char * 1986 Thread::RunModeAsCString (lldb::RunMode mode) 1987 { 1988 switch (mode) 1989 { 1990 case eOnlyThisThread: return "only this thread"; 1991 case eAllThreads: return "all threads"; 1992 case eOnlyDuringStepping: return "only during stepping"; 1993 } 1994 1995 static char unknown_state_string[64]; 1996 snprintf(unknown_state_string, sizeof (unknown_state_string), "RunMode = %i", mode); 1997 return unknown_state_string; 1998 } 1999 2000 size_t 2001 Thread::GetStatus (Stream &strm, uint32_t start_frame, uint32_t num_frames, uint32_t num_frames_with_source) 2002 { 2003 ExecutionContext exe_ctx (shared_from_this()); 2004 Target *target = exe_ctx.GetTargetPtr(); 2005 Process *process = exe_ctx.GetProcessPtr(); 2006 size_t num_frames_shown = 0; 2007 strm.Indent(); 2008 bool is_selected = false; 2009 if (process) 2010 { 2011 if (process->GetThreadList().GetSelectedThread().get() == this) 2012 is_selected = true; 2013 } 2014 strm.Printf("%c ", is_selected ? '*' : ' '); 2015 if (target && target->GetDebugger().GetUseExternalEditor()) 2016 { 2017 StackFrameSP frame_sp = GetStackFrameAtIndex(start_frame); 2018 if (frame_sp) 2019 { 2020 SymbolContext frame_sc(frame_sp->GetSymbolContext (eSymbolContextLineEntry)); 2021 if (frame_sc.line_entry.line != 0 && frame_sc.line_entry.file) 2022 { 2023 Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); 2024 } 2025 } 2026 } 2027 2028 DumpUsingSettingsFormat (strm, start_frame); 2029 2030 if (num_frames > 0) 2031 { 2032 strm.IndentMore(); 2033 2034 const bool show_frame_info = true; 2035 2036 const char *selected_frame_marker = NULL; 2037 if (num_frames == 1 || (GetID() != GetProcess()->GetThreadList().GetSelectedThread()->GetID())) 2038 strm.IndentMore (); 2039 else 2040 selected_frame_marker = "* "; 2041 2042 num_frames_shown = GetStackFrameList ()->GetStatus (strm, 2043 start_frame, 2044 num_frames, 2045 show_frame_info, 2046 num_frames_with_source, 2047 selected_frame_marker); 2048 if (num_frames == 1) 2049 strm.IndentLess(); 2050 strm.IndentLess(); 2051 } 2052 return num_frames_shown; 2053 } 2054 2055 size_t 2056 Thread::GetStackFrameStatus (Stream& strm, 2057 uint32_t first_frame, 2058 uint32_t num_frames, 2059 bool show_frame_info, 2060 uint32_t num_frames_with_source) 2061 { 2062 return GetStackFrameList()->GetStatus (strm, 2063 first_frame, 2064 num_frames, 2065 show_frame_info, 2066 num_frames_with_source); 2067 } 2068 2069 Unwind * 2070 Thread::GetUnwinder () 2071 { 2072 if (m_unwinder_ap.get() == NULL) 2073 { 2074 const ArchSpec target_arch (CalculateTarget()->GetArchitecture ()); 2075 const llvm::Triple::ArchType machine = target_arch.GetMachine(); 2076 switch (machine) 2077 { 2078 case llvm::Triple::x86_64: 2079 case llvm::Triple::x86: 2080 case llvm::Triple::arm: 2081 case llvm::Triple::arm64: 2082 case llvm::Triple::thumb: 2083 case llvm::Triple::mips64: 2084 case llvm::Triple::hexagon: 2085 m_unwinder_ap.reset (new UnwindLLDB (*this)); 2086 break; 2087 2088 default: 2089 if (target_arch.GetTriple().getVendor() == llvm::Triple::Apple) 2090 m_unwinder_ap.reset (new UnwindMacOSXFrameBackchain (*this)); 2091 break; 2092 } 2093 } 2094 return m_unwinder_ap.get(); 2095 } 2096 2097 2098 void 2099 Thread::Flush () 2100 { 2101 ClearStackFrames (); 2102 m_reg_context_sp.reset(); 2103 } 2104 2105 bool 2106 Thread::IsStillAtLastBreakpointHit () 2107 { 2108 // If we are currently stopped at a breakpoint, always return that stopinfo and don't reset it. 2109 // This allows threads to maintain their breakpoint stopinfo, such as when thread-stepping in 2110 // multithreaded programs. 2111 if (m_stop_info_sp) { 2112 StopReason stop_reason = m_stop_info_sp->GetStopReason(); 2113 if (stop_reason == lldb::eStopReasonBreakpoint) { 2114 uint64_t value = m_stop_info_sp->GetValue(); 2115 lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); 2116 if (reg_ctx_sp) 2117 { 2118 lldb::addr_t pc = reg_ctx_sp->GetPC(); 2119 BreakpointSiteSP bp_site_sp = GetProcess()->GetBreakpointSiteList().FindByAddress(pc); 2120 if (bp_site_sp && 2121 static_cast<break_id_t>(value) == bp_site_sp->GetID()) 2122 return true; 2123 } 2124 } 2125 } 2126 return false; 2127 } 2128 2129 2130 Error 2131 Thread::StepIn (bool source_step, 2132 LazyBool step_in_avoids_code_without_debug_info, 2133 LazyBool step_out_avoids_code_without_debug_info) 2134 2135 { 2136 Error error; 2137 Process *process = GetProcess().get(); 2138 if (StateIsStoppedState (process->GetState(), true)) 2139 { 2140 StackFrameSP frame_sp = GetStackFrameAtIndex (0); 2141 ThreadPlanSP new_plan_sp; 2142 const lldb::RunMode run_mode = eOnlyThisThread; 2143 const bool abort_other_plans = false; 2144 2145 if (source_step && frame_sp && frame_sp->HasDebugInformation ()) 2146 { 2147 SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything)); 2148 new_plan_sp = QueueThreadPlanForStepInRange (abort_other_plans, 2149 sc.line_entry.range, 2150 sc, 2151 NULL, 2152 run_mode, 2153 step_in_avoids_code_without_debug_info, 2154 step_out_avoids_code_without_debug_info); 2155 } 2156 else 2157 { 2158 new_plan_sp = QueueThreadPlanForStepSingleInstruction (false, 2159 abort_other_plans, 2160 run_mode); 2161 } 2162 2163 new_plan_sp->SetIsMasterPlan(true); 2164 new_plan_sp->SetOkayToDiscard(false); 2165 2166 // Why do we need to set the current thread by ID here??? 2167 process->GetThreadList().SetSelectedThreadByID (GetID()); 2168 error = process->Resume(); 2169 } 2170 else 2171 { 2172 error.SetErrorString("process not stopped"); 2173 } 2174 return error; 2175 } 2176 2177 Error 2178 Thread::StepOver (bool source_step, 2179 LazyBool step_out_avoids_code_without_debug_info) 2180 { 2181 Error error; 2182 Process *process = GetProcess().get(); 2183 if (StateIsStoppedState (process->GetState(), true)) 2184 { 2185 StackFrameSP frame_sp = GetStackFrameAtIndex (0); 2186 ThreadPlanSP new_plan_sp; 2187 2188 const lldb::RunMode run_mode = eOnlyThisThread; 2189 const bool abort_other_plans = false; 2190 2191 if (source_step && frame_sp && frame_sp->HasDebugInformation ()) 2192 { 2193 SymbolContext sc(frame_sp->GetSymbolContext(eSymbolContextEverything)); 2194 new_plan_sp = QueueThreadPlanForStepOverRange (abort_other_plans, 2195 sc.line_entry.range, 2196 sc, 2197 run_mode, 2198 step_out_avoids_code_without_debug_info); 2199 } 2200 else 2201 { 2202 new_plan_sp = QueueThreadPlanForStepSingleInstruction (true, 2203 abort_other_plans, 2204 run_mode); 2205 } 2206 2207 new_plan_sp->SetIsMasterPlan(true); 2208 new_plan_sp->SetOkayToDiscard(false); 2209 2210 // Why do we need to set the current thread by ID here??? 2211 process->GetThreadList().SetSelectedThreadByID (GetID()); 2212 error = process->Resume(); 2213 } 2214 else 2215 { 2216 error.SetErrorString("process not stopped"); 2217 } 2218 return error; 2219 } 2220 2221 Error 2222 Thread::StepOut () 2223 { 2224 Error error; 2225 Process *process = GetProcess().get(); 2226 if (StateIsStoppedState (process->GetState(), true)) 2227 { 2228 const bool first_instruction = false; 2229 const bool stop_other_threads = false; 2230 const bool abort_other_plans = false; 2231 2232 ThreadPlanSP new_plan_sp(QueueThreadPlanForStepOut (abort_other_plans, 2233 NULL, 2234 first_instruction, 2235 stop_other_threads, 2236 eVoteYes, 2237 eVoteNoOpinion, 2238 0)); 2239 2240 new_plan_sp->SetIsMasterPlan(true); 2241 new_plan_sp->SetOkayToDiscard(false); 2242 2243 // Why do we need to set the current thread by ID here??? 2244 process->GetThreadList().SetSelectedThreadByID (GetID()); 2245 error = process->Resume(); 2246 } 2247 else 2248 { 2249 error.SetErrorString("process not stopped"); 2250 } 2251 return error; 2252 } 2253