| //===-- Thread.cpp ----------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/lldb-python.h" |
| |
| #include "lldb/lldb-private-log.h" |
| #include "lldb/Breakpoint/BreakpointLocation.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/State.h" |
| #include "lldb/Core/Stream.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Core/RegularExpression.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Symbol/Function.h" |
| #include "lldb/Target/DynamicLoader.h" |
| #include "lldb/Target/ExecutionContext.h" |
| #include "lldb/Target/ObjCLanguageRuntime.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/StopInfo.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Thread.h" |
| #include "lldb/Target/ThreadPlan.h" |
| #include "lldb/Target/ThreadPlanCallFunction.h" |
| #include "lldb/Target/ThreadPlanBase.h" |
| #include "lldb/Target/ThreadPlanStepInstruction.h" |
| #include "lldb/Target/ThreadPlanStepOut.h" |
| #include "lldb/Target/ThreadPlanStepOverBreakpoint.h" |
| #include "lldb/Target/ThreadPlanStepThrough.h" |
| #include "lldb/Target/ThreadPlanStepInRange.h" |
| #include "lldb/Target/ThreadPlanStepOverRange.h" |
| #include "lldb/Target/ThreadPlanRunToAddress.h" |
| #include "lldb/Target/ThreadPlanStepUntil.h" |
| #include "lldb/Target/ThreadSpec.h" |
| #include "lldb/Target/Unwind.h" |
| #include "Plugins/Process/Utility/UnwindLLDB.h" |
| #include "UnwindMacOSXFrameBackchain.h" |
| |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| |
| const ThreadPropertiesSP & |
| Thread::GetGlobalProperties() |
| { |
| static ThreadPropertiesSP g_settings_sp; |
| if (!g_settings_sp) |
| g_settings_sp.reset (new ThreadProperties (true)); |
| return g_settings_sp; |
| } |
| |
| static PropertyDefinition |
| g_properties[] = |
| { |
| { "step-avoid-regexp", OptionValue::eTypeRegex , true , REG_EXTENDED, "^std::", NULL, "A regular expression defining functions step-in won't stop in." }, |
| { "trace-thread", OptionValue::eTypeBoolean, false, false, NULL, NULL, "If true, this thread will single-step and log execution." }, |
| { NULL , OptionValue::eTypeInvalid, false, 0 , NULL, NULL, NULL } |
| }; |
| |
| enum { |
| ePropertyStepAvoidRegex, |
| ePropertyEnableThreadTrace |
| }; |
| |
| |
| class ThreadOptionValueProperties : public OptionValueProperties |
| { |
| public: |
| ThreadOptionValueProperties (const ConstString &name) : |
| OptionValueProperties (name) |
| { |
| } |
| |
| // This constructor is used when creating ThreadOptionValueProperties when it |
| // is part of a new lldb_private::Thread instance. It will copy all current |
| // global property values as needed |
| ThreadOptionValueProperties (ThreadProperties *global_properties) : |
| OptionValueProperties(*global_properties->GetValueProperties()) |
| { |
| } |
| |
| virtual const Property * |
| GetPropertyAtIndex (const ExecutionContext *exe_ctx, bool will_modify, uint32_t idx) const |
| { |
| // When gettings the value for a key from the thread options, we will always |
| // try and grab the setting from the current thread if there is one. Else we just |
| // use the one from this instance. |
| if (exe_ctx) |
| { |
| Thread *thread = exe_ctx->GetThreadPtr(); |
| if (thread) |
| { |
| ThreadOptionValueProperties *instance_properties = static_cast<ThreadOptionValueProperties *>(thread->GetValueProperties().get()); |
| if (this != instance_properties) |
| return instance_properties->ProtectedGetPropertyAtIndex (idx); |
| } |
| } |
| return ProtectedGetPropertyAtIndex (idx); |
| } |
| }; |
| |
| |
| |
| ThreadProperties::ThreadProperties (bool is_global) : |
| Properties () |
| { |
| if (is_global) |
| { |
| m_collection_sp.reset (new ThreadOptionValueProperties(ConstString("thread"))); |
| m_collection_sp->Initialize(g_properties); |
| } |
| else |
| m_collection_sp.reset (new ThreadOptionValueProperties(Thread::GetGlobalProperties().get())); |
| } |
| |
| ThreadProperties::~ThreadProperties() |
| { |
| } |
| |
| const RegularExpression * |
| ThreadProperties::GetSymbolsToAvoidRegexp() |
| { |
| const uint32_t idx = ePropertyStepAvoidRegex; |
| return m_collection_sp->GetPropertyAtIndexAsOptionValueRegex (NULL, idx); |
| } |
| |
| bool |
| ThreadProperties::GetTraceEnabledState() const |
| { |
| const uint32_t idx = ePropertyEnableThreadTrace; |
| return m_collection_sp->GetPropertyAtIndexAsBoolean (NULL, idx, g_properties[idx].default_uint_value != 0); |
| } |
| |
| //------------------------------------------------------------------ |
| // Thread Event Data |
| //------------------------------------------------------------------ |
| |
| |
| const ConstString & |
| Thread::ThreadEventData::GetFlavorString () |
| { |
| static ConstString g_flavor ("Thread::ThreadEventData"); |
| return g_flavor; |
| } |
| |
| Thread::ThreadEventData::ThreadEventData (const lldb::ThreadSP thread_sp) : |
| m_thread_sp (thread_sp), |
| m_stack_id () |
| { |
| } |
| |
| Thread::ThreadEventData::ThreadEventData (const lldb::ThreadSP thread_sp, const StackID &stack_id) : |
| m_thread_sp (thread_sp), |
| m_stack_id (stack_id) |
| { |
| } |
| |
| Thread::ThreadEventData::ThreadEventData () : |
| m_thread_sp (), |
| m_stack_id () |
| { |
| } |
| |
| Thread::ThreadEventData::~ThreadEventData () |
| { |
| } |
| |
| void |
| Thread::ThreadEventData::Dump (Stream *s) const |
| { |
| |
| } |
| |
| const Thread::ThreadEventData * |
| Thread::ThreadEventData::GetEventDataFromEvent (const Event *event_ptr) |
| { |
| if (event_ptr) |
| { |
| const EventData *event_data = event_ptr->GetData(); |
| if (event_data && event_data->GetFlavor() == ThreadEventData::GetFlavorString()) |
| return static_cast <const ThreadEventData *> (event_ptr->GetData()); |
| } |
| return NULL; |
| } |
| |
| ThreadSP |
| Thread::ThreadEventData::GetThreadFromEvent (const Event *event_ptr) |
| { |
| ThreadSP thread_sp; |
| const ThreadEventData *event_data = GetEventDataFromEvent (event_ptr); |
| if (event_data) |
| thread_sp = event_data->GetThread(); |
| return thread_sp; |
| } |
| |
| StackID |
| Thread::ThreadEventData::GetStackIDFromEvent (const Event *event_ptr) |
| { |
| StackID stack_id; |
| const ThreadEventData *event_data = GetEventDataFromEvent (event_ptr); |
| if (event_data) |
| stack_id = event_data->GetStackID(); |
| return stack_id; |
| } |
| |
| StackFrameSP |
| Thread::ThreadEventData::GetStackFrameFromEvent (const Event *event_ptr) |
| { |
| const ThreadEventData *event_data = GetEventDataFromEvent (event_ptr); |
| StackFrameSP frame_sp; |
| if (event_data) |
| { |
| ThreadSP thread_sp = event_data->GetThread(); |
| if (thread_sp) |
| { |
| frame_sp = thread_sp->GetStackFrameList()->GetFrameWithStackID (event_data->GetStackID()); |
| } |
| } |
| return frame_sp; |
| } |
| |
| //------------------------------------------------------------------ |
| // Thread class |
| //------------------------------------------------------------------ |
| |
| ConstString & |
| Thread::GetStaticBroadcasterClass () |
| { |
| static ConstString class_name ("lldb.thread"); |
| return class_name; |
| } |
| |
| Thread::Thread (Process &process, lldb::tid_t tid) : |
| ThreadProperties (false), |
| UserID (tid), |
| Broadcaster(&process.GetTarget().GetDebugger(), Thread::GetStaticBroadcasterClass().AsCString()), |
| m_process_wp (process.shared_from_this()), |
| m_stop_info_sp (), |
| m_stop_info_stop_id (0), |
| m_index_id (process.GetNextThreadIndexID(tid)), |
| m_reg_context_sp (), |
| m_state (eStateUnloaded), |
| m_state_mutex (Mutex::eMutexTypeRecursive), |
| m_plan_stack (), |
| m_completed_plan_stack(), |
| m_frame_mutex (Mutex::eMutexTypeRecursive), |
| m_curr_frames_sp (), |
| m_prev_frames_sp (), |
| m_resume_signal (LLDB_INVALID_SIGNAL_NUMBER), |
| m_resume_state (eStateRunning), |
| m_temporary_resume_state (eStateRunning), |
| m_unwinder_ap (), |
| m_destroy_called (false), |
| m_override_should_notify (eLazyBoolCalculate) |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); |
| if (log) |
| log->Printf ("%p Thread::Thread(tid = 0x%4.4" PRIx64 ")", this, GetID()); |
| |
| CheckInWithManager(); |
| QueueFundamentalPlan(true); |
| } |
| |
| |
| Thread::~Thread() |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_OBJECT)); |
| if (log) |
| log->Printf ("%p Thread::~Thread(tid = 0x%4.4" PRIx64 ")", this, GetID()); |
| /// If you hit this assert, it means your derived class forgot to call DoDestroy in its destructor. |
| assert (m_destroy_called); |
| } |
| |
| void |
| Thread::DestroyThread () |
| { |
| // Tell any plans on the plan stack that the thread is being destroyed since |
| // any active plans that have a thread go away in the middle of might need |
| // to do cleanup. |
| for (auto plan : m_plan_stack) |
| plan->ThreadDestroyed(); |
| |
| m_destroy_called = true; |
| m_plan_stack.clear(); |
| m_discarded_plan_stack.clear(); |
| m_completed_plan_stack.clear(); |
| m_stop_info_sp.reset(); |
| m_reg_context_sp.reset(); |
| m_unwinder_ap.reset(); |
| Mutex::Locker locker(m_frame_mutex); |
| m_curr_frames_sp.reset(); |
| m_prev_frames_sp.reset(); |
| } |
| |
| void |
| Thread::BroadcastSelectedFrameChange(StackID &new_frame_id) |
| { |
| if (EventTypeHasListeners(eBroadcastBitSelectedFrameChanged)) |
| BroadcastEvent(eBroadcastBitSelectedFrameChanged, new ThreadEventData (this->shared_from_this(), new_frame_id)); |
| } |
| |
| uint32_t |
| Thread::SetSelectedFrame (lldb_private::StackFrame *frame, bool broadcast) |
| { |
| uint32_t ret_value = GetStackFrameList()->SetSelectedFrame(frame); |
| if (broadcast) |
| BroadcastSelectedFrameChange(frame->GetStackID()); |
| return ret_value; |
| } |
| |
| bool |
| Thread::SetSelectedFrameByIndex (uint32_t frame_idx, bool broadcast) |
| { |
| StackFrameSP frame_sp(GetStackFrameList()->GetFrameAtIndex (frame_idx)); |
| if (frame_sp) |
| { |
| GetStackFrameList()->SetSelectedFrame(frame_sp.get()); |
| if (broadcast) |
| BroadcastSelectedFrameChange(frame_sp->GetStackID()); |
| return true; |
| } |
| else |
| return false; |
| } |
| |
| bool |
| Thread::SetSelectedFrameByIndexNoisily (uint32_t frame_idx, Stream &output_stream) |
| { |
| const bool broadcast = true; |
| bool success = SetSelectedFrameByIndex (frame_idx, broadcast); |
| if (success) |
| { |
| StackFrameSP frame_sp = GetSelectedFrame(); |
| if (frame_sp) |
| { |
| bool already_shown = false; |
| SymbolContext frame_sc(frame_sp->GetSymbolContext(eSymbolContextLineEntry)); |
| if (GetProcess()->GetTarget().GetDebugger().GetUseExternalEditor() && frame_sc.line_entry.file && frame_sc.line_entry.line != 0) |
| { |
| already_shown = Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); |
| } |
| |
| bool show_frame_info = true; |
| bool show_source = !already_shown; |
| return frame_sp->GetStatus (output_stream, show_frame_info, show_source); |
| } |
| return false; |
| } |
| else |
| return false; |
| } |
| |
| |
| lldb::StopInfoSP |
| Thread::GetStopInfo () |
| { |
| ThreadPlanSP plan_sp (GetCompletedPlan()); |
| ProcessSP process_sp (GetProcess()); |
| const uint32_t stop_id = process_sp ? process_sp->GetStopID() : UINT32_MAX; |
| if (plan_sp && plan_sp->PlanSucceeded()) |
| { |
| return StopInfo::CreateStopReasonWithPlan (plan_sp, GetReturnValueObject()); |
| } |
| else |
| { |
| if ((m_stop_info_stop_id == stop_id) || // Stop info is valid, just return what we have (even if empty) |
| (m_stop_info_sp && m_stop_info_sp->IsValid())) // Stop info is valid, just return what we have |
| { |
| return m_stop_info_sp; |
| } |
| else |
| { |
| GetPrivateStopInfo (); |
| return m_stop_info_sp; |
| } |
| } |
| } |
| |
| lldb::StopInfoSP |
| Thread::GetPrivateStopInfo () |
| { |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| { |
| const uint32_t process_stop_id = process_sp->GetStopID(); |
| if (m_stop_info_stop_id != process_stop_id) |
| { |
| if (m_stop_info_sp) |
| { |
| if (m_stop_info_sp->IsValid() |
| || IsStillAtLastBreakpointHit() |
| || GetCurrentPlan()->IsVirtualStep()) |
| SetStopInfo (m_stop_info_sp); |
| else |
| m_stop_info_sp.reset(); |
| } |
| |
| if (!m_stop_info_sp) |
| { |
| if (CalculateStopInfo() == false) |
| SetStopInfo (StopInfoSP()); |
| } |
| } |
| } |
| return m_stop_info_sp; |
| } |
| |
| |
| lldb::StopReason |
| Thread::GetStopReason() |
| { |
| lldb::StopInfoSP stop_info_sp (GetStopInfo ()); |
| if (stop_info_sp) |
| return stop_info_sp->GetStopReason(); |
| return eStopReasonNone; |
| } |
| |
| |
| |
| void |
| Thread::SetStopInfo (const lldb::StopInfoSP &stop_info_sp) |
| { |
| m_stop_info_sp = stop_info_sp; |
| if (m_stop_info_sp) |
| { |
| m_stop_info_sp->MakeStopInfoValid(); |
| // If we are overriding the ShouldReportStop, do that here: |
| if (m_override_should_notify != eLazyBoolCalculate) |
| m_stop_info_sp->OverrideShouldNotify (m_override_should_notify == eLazyBoolYes); |
| } |
| |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| m_stop_info_stop_id = process_sp->GetStopID(); |
| else |
| m_stop_info_stop_id = UINT32_MAX; |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD)); |
| if (log) |
| 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); |
| } |
| |
| void |
| Thread::SetShouldReportStop (Vote vote) |
| { |
| if (vote == eVoteNoOpinion) |
| return; |
| else |
| { |
| m_override_should_notify = (vote == eVoteYes ? eLazyBoolYes : eLazyBoolNo); |
| if (m_stop_info_sp) |
| m_stop_info_sp->OverrideShouldNotify (m_override_should_notify == eLazyBoolYes); |
| } |
| } |
| |
| void |
| Thread::SetStopInfoToNothing() |
| { |
| // Note, we can't just NULL out the private reason, or the native thread implementation will try to |
| // go calculate it again. For now, just set it to a Unix Signal with an invalid signal number. |
| SetStopInfo (StopInfo::CreateStopReasonWithSignal (*this, LLDB_INVALID_SIGNAL_NUMBER)); |
| } |
| |
| bool |
| Thread::ThreadStoppedForAReason (void) |
| { |
| return (bool) GetPrivateStopInfo (); |
| } |
| |
| bool |
| Thread::CheckpointThreadState (ThreadStateCheckpoint &saved_state) |
| { |
| if (!SaveFrameZeroState(saved_state.register_backup)) |
| return false; |
| |
| saved_state.stop_info_sp = GetStopInfo(); |
| ProcessSP process_sp (GetProcess()); |
| if (process_sp) |
| saved_state.orig_stop_id = process_sp->GetStopID(); |
| saved_state.current_inlined_depth = GetCurrentInlinedDepth(); |
| |
| return true; |
| } |
| |
| bool |
| Thread::RestoreRegisterStateFromCheckpoint (ThreadStateCheckpoint &saved_state) |
| { |
| RestoreSaveFrameZero(saved_state.register_backup); |
| return true; |
| } |
| |
| bool |
| Thread::RestoreThreadStateFromCheckpoint (ThreadStateCheckpoint &saved_state) |
| { |
| if (saved_state.stop_info_sp) |
| saved_state.stop_info_sp->MakeStopInfoValid(); |
| SetStopInfo(saved_state.stop_info_sp); |
| GetStackFrameList()->SetCurrentInlinedDepth (saved_state.current_inlined_depth); |
| return true; |
| } |
| |
| StateType |
| Thread::GetState() const |
| { |
| // If any other threads access this we will need a mutex for it |
| Mutex::Locker locker(m_state_mutex); |
| return m_state; |
| } |
| |
| void |
| Thread::SetState(StateType state) |
| { |
| Mutex::Locker locker(m_state_mutex); |
| m_state = state; |
| } |
| |
| void |
| Thread::WillStop() |
| { |
| ThreadPlan *current_plan = GetCurrentPlan(); |
| |
| // FIXME: I may decide to disallow threads with no plans. In which |
| // case this should go to an assert. |
| |
| if (!current_plan) |
| return; |
| |
| current_plan->WillStop(); |
| } |
| |
| void |
| Thread::SetupForResume () |
| { |
| if (GetResumeState() != eStateSuspended) |
| { |
| |
| // If we're at a breakpoint push the step-over breakpoint plan. Do this before |
| // telling the current plan it will resume, since we might change what the current |
| // plan is. |
| |
| // StopReason stop_reason = lldb::eStopReasonInvalid; |
| // StopInfoSP stop_info_sp = GetStopInfo(); |
| // if (stop_info_sp.get()) |
| // stop_reason = stop_info_sp->GetStopReason(); |
| // if (stop_reason == lldb::eStopReasonBreakpoint) |
| lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); |
| if (reg_ctx_sp) |
| { |
| BreakpointSiteSP bp_site_sp = GetProcess()->GetBreakpointSiteList().FindByAddress(reg_ctx_sp->GetPC()); |
| if (bp_site_sp) |
| { |
| // Note, don't assume there's a ThreadPlanStepOverBreakpoint, the target may not require anything |
| // special to step over a breakpoint. |
| |
| ThreadPlan *cur_plan = GetCurrentPlan(); |
| |
| if (cur_plan->GetKind() != ThreadPlan::eKindStepOverBreakpoint) |
| { |
| ThreadPlanStepOverBreakpoint *step_bp_plan = new ThreadPlanStepOverBreakpoint (*this); |
| if (step_bp_plan) |
| { |
| ThreadPlanSP step_bp_plan_sp; |
| step_bp_plan->SetPrivate (true); |
| |
| if (GetCurrentPlan()->RunState() != eStateStepping) |
| { |
| step_bp_plan->SetAutoContinue(true); |
| } |
| step_bp_plan_sp.reset (step_bp_plan); |
| QueueThreadPlan (step_bp_plan_sp, false); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| bool |
| Thread::ShouldResume (StateType resume_state) |
| { |
| // At this point clear the completed plan stack. |
| m_completed_plan_stack.clear(); |
| m_discarded_plan_stack.clear(); |
| m_override_should_notify = eLazyBoolCalculate; |
| |
| m_temporary_resume_state = resume_state; |
| |
| lldb::ThreadSP backing_thread_sp (GetBackingThread ()); |
| if (backing_thread_sp) |
| backing_thread_sp->m_temporary_resume_state = resume_state; |
| |
| // Make sure m_stop_info_sp is valid |
| GetPrivateStopInfo(); |
| |
| // This is a little dubious, but we are trying to limit how often we actually fetch stop info from |
| // the target, 'cause that slows down single stepping. So assume that if we got to the point where |
| // we're about to resume, and we haven't yet had to fetch the stop reason, then it doesn't need to know |
| // about the fact that we are resuming... |
| const uint32_t process_stop_id = GetProcess()->GetStopID(); |
| if (m_stop_info_stop_id == process_stop_id && |
| (m_stop_info_sp && m_stop_info_sp->IsValid())) |
| { |
| StopInfo *stop_info = GetPrivateStopInfo().get(); |
| if (stop_info) |
| stop_info->WillResume (resume_state); |
| } |
| |
| // Tell all the plans that we are about to resume in case they need to clear any state. |
| // We distinguish between the plan on the top of the stack and the lower |
| // plans in case a plan needs to do any special business before it runs. |
| |
| bool need_to_resume = false; |
| ThreadPlan *plan_ptr = GetCurrentPlan(); |
| if (plan_ptr) |
| { |
| need_to_resume = plan_ptr->WillResume(resume_state, true); |
| |
| while ((plan_ptr = GetPreviousPlan(plan_ptr)) != NULL) |
| { |
| plan_ptr->WillResume (resume_state, false); |
| } |
| |
| // If the WillResume for the plan says we are faking a resume, then it will have set an appropriate stop info. |
| // In that case, don't reset it here. |
| |
| if (need_to_resume && resume_state != eStateSuspended) |
| { |
| m_stop_info_sp.reset(); |
| } |
| } |
| |
| if (need_to_resume) |
| { |
| ClearStackFrames(); |
| // Let Thread subclasses do any special work they need to prior to resuming |
| WillResume (resume_state); |
| } |
| |
| return need_to_resume; |
| } |
| |
| void |
| Thread::DidResume () |
| { |
| SetResumeSignal (LLDB_INVALID_SIGNAL_NUMBER); |
| } |
| |
| void |
| Thread::DidStop () |
| { |
| SetState (eStateStopped); |
| } |
| |
| bool |
| Thread::ShouldStop (Event* event_ptr) |
| { |
| ThreadPlan *current_plan = GetCurrentPlan(); |
| |
| bool should_stop = true; |
| |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| |
| if (GetResumeState () == eStateSuspended) |
| { |
| if (log) |
| log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", should_stop = 0 (ignore since thread was suspended)", |
| __FUNCTION__, |
| GetID (), |
| GetProtocolID()); |
| return false; |
| } |
| |
| if (GetTemporaryResumeState () == eStateSuspended) |
| { |
| if (log) |
| log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", should_stop = 0 (ignore since thread was suspended)", |
| __FUNCTION__, |
| GetID (), |
| GetProtocolID()); |
| return false; |
| } |
| |
| // Based on the current thread plan and process stop info, check if this |
| // thread caused the process to stop. NOTE: this must take place before |
| // the plan is moved from the current plan stack to the completed plan |
| // stack. |
| if (ThreadStoppedForAReason() == false) |
| { |
| if (log) |
| 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)", |
| __FUNCTION__, |
| GetID (), |
| GetProtocolID(), |
| GetRegisterContext() ? GetRegisterContext()->GetPC() : LLDB_INVALID_ADDRESS); |
| return false; |
| } |
| |
| if (log) |
| { |
| log->Printf ("Thread::%s for tid = 0x%4.4" PRIx64 " 0x%4.4" PRIx64 ", pc = 0x%16.16" PRIx64, |
| __FUNCTION__, |
| GetID (), |
| GetProtocolID (), |
| GetRegisterContext() ? GetRegisterContext()->GetPC() : LLDB_INVALID_ADDRESS); |
| log->Printf ("^^^^^^^^ Thread::ShouldStop Begin ^^^^^^^^"); |
| StreamString s; |
| s.IndentMore(); |
| DumpThreadPlans(&s); |
| log->Printf ("Plan stack initial state:\n%s", s.GetData()); |
| } |
| |
| // The top most plan always gets to do the trace log... |
| current_plan->DoTraceLog (); |
| |
| // First query the stop info's ShouldStopSynchronous. This handles "synchronous" stop reasons, for example the breakpoint |
| // command on internal breakpoints. If a synchronous stop reason says we should not stop, then we don't have to |
| // do any more work on this stop. |
| StopInfoSP private_stop_info (GetPrivateStopInfo()); |
| if (private_stop_info && private_stop_info->ShouldStopSynchronous(event_ptr) == false) |
| { |
| if (log) |
| log->Printf ("StopInfo::ShouldStop async callback says we should not stop, returning ShouldStop of false."); |
| return false; |
| } |
| |
| // If we've already been restarted, don't query the plans since the state they would examine is not current. |
| if (Process::ProcessEventData::GetRestartedFromEvent(event_ptr)) |
| return false; |
| |
| // Before the plans see the state of the world, calculate the current inlined depth. |
| GetStackFrameList()->CalculateCurrentInlinedDepth(); |
| |
| // If the base plan doesn't understand why we stopped, then we have to find a plan that does. |
| // If that plan is still working, then we don't need to do any more work. If the plan that explains |
| // the stop is done, then we should pop all the plans below it, and pop it, and then let the plans above it decide |
| // whether they still need to do more work. |
| |
| bool done_processing_current_plan = false; |
| |
| if (!current_plan->PlanExplainsStop(event_ptr)) |
| { |
| if (current_plan->TracerExplainsStop()) |
| { |
| done_processing_current_plan = true; |
| should_stop = false; |
| } |
| else |
| { |
| // If the current plan doesn't explain the stop, then find one that |
| // does and let it handle the situation. |
| ThreadPlan *plan_ptr = current_plan; |
| while ((plan_ptr = GetPreviousPlan(plan_ptr)) != NULL) |
| { |
| if (plan_ptr->PlanExplainsStop(event_ptr)) |
| { |
| should_stop = plan_ptr->ShouldStop (event_ptr); |
| |
| // plan_ptr explains the stop, next check whether plan_ptr is done, if so, then we should take it |
| // and all the plans below it off the stack. |
| |
| if (plan_ptr->MischiefManaged()) |
| { |
| // We're going to pop the plans up to and including the plan that explains the stop. |
| ThreadPlan *prev_plan_ptr = GetPreviousPlan (plan_ptr); |
| |
| do |
| { |
| if (should_stop) |
| current_plan->WillStop(); |
| PopPlan(); |
| } |
| while ((current_plan = GetCurrentPlan()) != prev_plan_ptr); |
| // Now, if the responsible plan was not "Okay to discard" then we're done, |
| // otherwise we forward this to the next plan in the stack below. |
| if (plan_ptr->IsMasterPlan() && !plan_ptr->OkayToDiscard()) |
| done_processing_current_plan = true; |
| else |
| done_processing_current_plan = false; |
| } |
| else |
| done_processing_current_plan = true; |
| |
| break; |
| } |
| |
| } |
| } |
| } |
| |
| if (!done_processing_current_plan) |
| { |
| bool over_ride_stop = current_plan->ShouldAutoContinue(event_ptr); |
| |
| if (log) |
| log->Printf("Plan %s explains stop, auto-continue %i.", current_plan->GetName(), over_ride_stop); |
| |
| // We're starting from the base plan, so just let it decide; |
| if (PlanIsBasePlan(current_plan)) |
| { |
| should_stop = current_plan->ShouldStop (event_ptr); |
| if (log) |
| log->Printf("Base plan says should stop: %i.", should_stop); |
| } |
| else |
| { |
| // Otherwise, don't let the base plan override what the other plans say to do, since |
| // presumably if there were other plans they would know what to do... |
| while (1) |
| { |
| if (PlanIsBasePlan(current_plan)) |
| break; |
| |
| should_stop = current_plan->ShouldStop(event_ptr); |
| if (log) |
| log->Printf("Plan %s should stop: %d.", current_plan->GetName(), should_stop); |
| if (current_plan->MischiefManaged()) |
| { |
| if (should_stop) |
| current_plan->WillStop(); |
| |
| // If a Master Plan wants to stop, and wants to stick on the stack, we let it. |
| // Otherwise, see if the plan's parent wants to stop. |
| |
| if (should_stop && current_plan->IsMasterPlan() && !current_plan->OkayToDiscard()) |
| { |
| PopPlan(); |
| break; |
| } |
| else |
| { |
| |
| PopPlan(); |
| |
| current_plan = GetCurrentPlan(); |
| if (current_plan == NULL) |
| { |
| break; |
| } |
| } |
| } |
| else |
| { |
| break; |
| } |
| } |
| } |
| |
| if (over_ride_stop) |
| should_stop = false; |
| |
| // One other potential problem is that we set up a master plan, then stop in before it is complete - for instance |
| // by hitting a breakpoint during a step-over - then do some step/finish/etc operations that wind up |
| // past the end point condition of the initial plan. We don't want to strand the original plan on the stack, |
| // This code clears stale plans off the stack. |
| |
| if (should_stop) |
| { |
| ThreadPlan *plan_ptr = GetCurrentPlan(); |
| while (!PlanIsBasePlan(plan_ptr)) |
| { |
| bool stale = plan_ptr->IsPlanStale (); |
| ThreadPlan *examined_plan = plan_ptr; |
| plan_ptr = GetPreviousPlan (examined_plan); |
| |
| if (stale) |
| { |
| if (log) |
| log->Printf("Plan %s being discarded in cleanup, it says it is already done.", examined_plan->GetName()); |
| DiscardThreadPlansUpToPlan(examined_plan); |
| } |
| } |
| } |
| |
| } |
| |
| if (log) |
| { |
| StreamString s; |
| s.IndentMore(); |
| DumpThreadPlans(&s); |
| log->Printf ("Plan stack final state:\n%s", s.GetData()); |
| log->Printf ("vvvvvvvv Thread::ShouldStop End (returning %i) vvvvvvvv", should_stop); |
| } |
| return should_stop; |
| } |
| |
| Vote |
| Thread::ShouldReportStop (Event* event_ptr) |
| { |
| StateType thread_state = GetResumeState (); |
| StateType temp_thread_state = GetTemporaryResumeState(); |
| |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| |
| if (thread_state == eStateSuspended || thread_state == eStateInvalid) |
| { |
| if (log) |
| log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (state was suspended or invalid)", GetID(), eVoteNoOpinion); |
| return eVoteNoOpinion; |
| } |
| |
| if (temp_thread_state == eStateSuspended || temp_thread_state == eStateInvalid) |
| { |
| if (log) |
| log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (temporary state was suspended or invalid)", GetID(), eVoteNoOpinion); |
| return eVoteNoOpinion; |
| } |
| |
| if (!ThreadStoppedForAReason()) |
| { |
| if (log) |
| log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i (thread didn't stop for a reason.)", GetID(), eVoteNoOpinion); |
| return eVoteNoOpinion; |
| } |
| |
| if (m_completed_plan_stack.size() > 0) |
| { |
| // Don't use GetCompletedPlan here, since that suppresses private plans. |
| if (log) |
| log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote for complete stack's back plan", GetID()); |
| return m_completed_plan_stack.back()->ShouldReportStop (event_ptr); |
| } |
| else |
| { |
| Vote thread_vote = eVoteNoOpinion; |
| ThreadPlan *plan_ptr = GetCurrentPlan(); |
| while (1) |
| { |
| if (plan_ptr->PlanExplainsStop(event_ptr)) |
| { |
| thread_vote = plan_ptr->ShouldReportStop(event_ptr); |
| break; |
| } |
| if (PlanIsBasePlan(plan_ptr)) |
| break; |
| else |
| plan_ptr = GetPreviousPlan(plan_ptr); |
| } |
| if (log) |
| log->Printf ("Thread::ShouldReportStop() tid = 0x%4.4" PRIx64 ": returning vote %i for current plan", GetID(), thread_vote); |
| |
| return thread_vote; |
| } |
| } |
| |
| Vote |
| Thread::ShouldReportRun (Event* event_ptr) |
| { |
| StateType thread_state = GetResumeState (); |
| |
| if (thread_state == eStateSuspended |
| || thread_state == eStateInvalid) |
| { |
| return eVoteNoOpinion; |
| } |
| |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (m_completed_plan_stack.size() > 0) |
| { |
| // Don't use GetCompletedPlan here, since that suppresses private plans. |
| if (log) |
| log->Printf ("Current Plan for thread %d (0x%4.4" PRIx64 ", %s): %s being asked whether we should report run.", |
| GetIndexID(), |
| GetID(), |
| StateAsCString(GetTemporaryResumeState()), |
| m_completed_plan_stack.back()->GetName()); |
| |
| return m_completed_plan_stack.back()->ShouldReportRun (event_ptr); |
| } |
| else |
| { |
| if (log) |
| log->Printf ("Current Plan for thread %d (0x%4.4" PRIx64 ", %s): %s being asked whether we should report run.", |
| GetIndexID(), |
| GetID(), |
| StateAsCString(GetTemporaryResumeState()), |
| GetCurrentPlan()->GetName()); |
| |
| return GetCurrentPlan()->ShouldReportRun (event_ptr); |
| } |
| } |
| |
| bool |
| Thread::MatchesSpec (const ThreadSpec *spec) |
| { |
| if (spec == NULL) |
| return true; |
| |
| return spec->ThreadPassesBasicTests(*this); |
| } |
| |
| void |
| Thread::PushPlan (ThreadPlanSP &thread_plan_sp) |
| { |
| if (thread_plan_sp) |
| { |
| // If the thread plan doesn't already have a tracer, give it its parent's tracer: |
| if (!thread_plan_sp->GetThreadPlanTracer()) |
| thread_plan_sp->SetThreadPlanTracer(m_plan_stack.back()->GetThreadPlanTracer()); |
| m_plan_stack.push_back (thread_plan_sp); |
| |
| thread_plan_sp->DidPush(); |
| |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (log) |
| { |
| StreamString s; |
| thread_plan_sp->GetDescription (&s, lldb::eDescriptionLevelFull); |
| log->Printf("Pushing plan: \"%s\", tid = 0x%4.4" PRIx64 ".", |
| s.GetData(), |
| thread_plan_sp->GetThread().GetID()); |
| } |
| } |
| } |
| |
| void |
| Thread::PopPlan () |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| |
| if (m_plan_stack.size() <= 1) |
| return; |
| else |
| { |
| ThreadPlanSP &plan = m_plan_stack.back(); |
| if (log) |
| { |
| log->Printf("Popping plan: \"%s\", tid = 0x%4.4" PRIx64 ".", plan->GetName(), plan->GetThread().GetID()); |
| } |
| m_completed_plan_stack.push_back (plan); |
| plan->WillPop(); |
| m_plan_stack.pop_back(); |
| } |
| } |
| |
| void |
| Thread::DiscardPlan () |
| { |
| if (m_plan_stack.size() > 1) |
| { |
| ThreadPlanSP &plan = m_plan_stack.back(); |
| m_discarded_plan_stack.push_back (plan); |
| plan->WillPop(); |
| m_plan_stack.pop_back(); |
| } |
| } |
| |
| ThreadPlan * |
| Thread::GetCurrentPlan () |
| { |
| // There will always be at least the base plan. If somebody is mucking with a |
| // thread with an empty plan stack, we should assert right away. |
| if (m_plan_stack.empty()) |
| return NULL; |
| return m_plan_stack.back().get(); |
| } |
| |
| ThreadPlanSP |
| Thread::GetCompletedPlan () |
| { |
| ThreadPlanSP empty_plan_sp; |
| if (!m_completed_plan_stack.empty()) |
| { |
| for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) |
| { |
| ThreadPlanSP completed_plan_sp; |
| completed_plan_sp = m_completed_plan_stack[i]; |
| if (!completed_plan_sp->GetPrivate ()) |
| return completed_plan_sp; |
| } |
| } |
| return empty_plan_sp; |
| } |
| |
| ValueObjectSP |
| Thread::GetReturnValueObject () |
| { |
| if (!m_completed_plan_stack.empty()) |
| { |
| for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) |
| { |
| ValueObjectSP return_valobj_sp; |
| return_valobj_sp = m_completed_plan_stack[i]->GetReturnValueObject(); |
| if (return_valobj_sp) |
| return return_valobj_sp; |
| } |
| } |
| return ValueObjectSP(); |
| } |
| |
| bool |
| Thread::IsThreadPlanDone (ThreadPlan *plan) |
| { |
| if (!m_completed_plan_stack.empty()) |
| { |
| for (int i = m_completed_plan_stack.size() - 1; i >= 0; i--) |
| { |
| if (m_completed_plan_stack[i].get() == plan) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool |
| Thread::WasThreadPlanDiscarded (ThreadPlan *plan) |
| { |
| if (!m_discarded_plan_stack.empty()) |
| { |
| for (int i = m_discarded_plan_stack.size() - 1; i >= 0; i--) |
| { |
| if (m_discarded_plan_stack[i].get() == plan) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| ThreadPlan * |
| Thread::GetPreviousPlan (ThreadPlan *current_plan) |
| { |
| if (current_plan == NULL) |
| return NULL; |
| |
| int stack_size = m_completed_plan_stack.size(); |
| for (int i = stack_size - 1; i > 0; i--) |
| { |
| if (current_plan == m_completed_plan_stack[i].get()) |
| return m_completed_plan_stack[i-1].get(); |
| } |
| |
| if (stack_size > 0 && m_completed_plan_stack[0].get() == current_plan) |
| { |
| if (m_plan_stack.size() > 0) |
| return m_plan_stack.back().get(); |
| else |
| return NULL; |
| } |
| |
| stack_size = m_plan_stack.size(); |
| for (int i = stack_size - 1; i > 0; i--) |
| { |
| if (current_plan == m_plan_stack[i].get()) |
| return m_plan_stack[i-1].get(); |
| } |
| return NULL; |
| } |
| |
| void |
| Thread::QueueThreadPlan (ThreadPlanSP &thread_plan_sp, bool abort_other_plans) |
| { |
| if (abort_other_plans) |
| DiscardThreadPlans(true); |
| |
| PushPlan (thread_plan_sp); |
| } |
| |
| |
| void |
| Thread::EnableTracer (bool value, bool single_stepping) |
| { |
| int stack_size = m_plan_stack.size(); |
| for (int i = 0; i < stack_size; i++) |
| { |
| if (m_plan_stack[i]->GetThreadPlanTracer()) |
| { |
| m_plan_stack[i]->GetThreadPlanTracer()->EnableTracing(value); |
| m_plan_stack[i]->GetThreadPlanTracer()->EnableSingleStep(single_stepping); |
| } |
| } |
| } |
| |
| void |
| Thread::SetTracer (lldb::ThreadPlanTracerSP &tracer_sp) |
| { |
| int stack_size = m_plan_stack.size(); |
| for (int i = 0; i < stack_size; i++) |
| m_plan_stack[i]->SetThreadPlanTracer(tracer_sp); |
| } |
| |
| void |
| Thread::DiscardThreadPlansUpToPlan (lldb::ThreadPlanSP &up_to_plan_sp) |
| { |
| DiscardThreadPlansUpToPlan (up_to_plan_sp.get()); |
| } |
| |
| void |
| Thread::DiscardThreadPlansUpToPlan (ThreadPlan *up_to_plan_ptr) |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (log) |
| { |
| log->Printf("Discarding thread plans for thread tid = 0x%4.4" PRIx64 ", up to %p", GetID(), up_to_plan_ptr); |
| } |
| |
| int stack_size = m_plan_stack.size(); |
| |
| // If the input plan is NULL, discard all plans. Otherwise make sure this plan is in the |
| // stack, and if so discard up to and including it. |
| |
| if (up_to_plan_ptr == NULL) |
| { |
| for (int i = stack_size - 1; i > 0; i--) |
| DiscardPlan(); |
| } |
| else |
| { |
| bool found_it = false; |
| for (int i = stack_size - 1; i > 0; i--) |
| { |
| if (m_plan_stack[i].get() == up_to_plan_ptr) |
| found_it = true; |
| } |
| if (found_it) |
| { |
| bool last_one = false; |
| for (int i = stack_size - 1; i > 0 && !last_one ; i--) |
| { |
| if (GetCurrentPlan() == up_to_plan_ptr) |
| last_one = true; |
| DiscardPlan(); |
| } |
| } |
| } |
| return; |
| } |
| |
| void |
| Thread::DiscardThreadPlans(bool force) |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (log) |
| { |
| log->Printf("Discarding thread plans for thread (tid = 0x%4.4" PRIx64 ", force %d)", GetID(), force); |
| } |
| |
| if (force) |
| { |
| int stack_size = m_plan_stack.size(); |
| for (int i = stack_size - 1; i > 0; i--) |
| { |
| DiscardPlan(); |
| } |
| return; |
| } |
| |
| while (1) |
| { |
| |
| int master_plan_idx; |
| bool discard = true; |
| |
| // Find the first master plan, see if it wants discarding, and if yes discard up to it. |
| for (master_plan_idx = m_plan_stack.size() - 1; master_plan_idx >= 0; master_plan_idx--) |
| { |
| if (m_plan_stack[master_plan_idx]->IsMasterPlan()) |
| { |
| discard = m_plan_stack[master_plan_idx]->OkayToDiscard(); |
| break; |
| } |
| } |
| |
| if (discard) |
| { |
| // First pop all the dependent plans: |
| for (int i = m_plan_stack.size() - 1; i > master_plan_idx; i--) |
| { |
| |
| // FIXME: Do we need a finalize here, or is the rule that "PrepareForStop" |
| // for the plan leaves it in a state that it is safe to pop the plan |
| // with no more notice? |
| DiscardPlan(); |
| } |
| |
| // Now discard the master plan itself. |
| // The bottom-most plan never gets discarded. "OkayToDiscard" for it means |
| // discard it's dependent plans, but not it... |
| if (master_plan_idx > 0) |
| { |
| DiscardPlan(); |
| } |
| } |
| else |
| { |
| // If the master plan doesn't want to get discarded, then we're done. |
| break; |
| } |
| |
| } |
| } |
| |
| bool |
| Thread::PlanIsBasePlan (ThreadPlan *plan_ptr) |
| { |
| if (plan_ptr->IsBasePlan()) |
| return true; |
| else if (m_plan_stack.size() == 0) |
| return false; |
| else |
| return m_plan_stack[0].get() == plan_ptr; |
| } |
| |
| Error |
| Thread::UnwindInnermostExpression() |
| { |
| Error error; |
| int stack_size = m_plan_stack.size(); |
| |
| // If the input plan is NULL, discard all plans. Otherwise make sure this plan is in the |
| // stack, and if so discard up to and including it. |
| |
| for (int i = stack_size - 1; i > 0; i--) |
| { |
| if (m_plan_stack[i]->GetKind() == ThreadPlan::eKindCallFunction) |
| { |
| DiscardThreadPlansUpToPlan(m_plan_stack[i].get()); |
| return error; |
| } |
| } |
| error.SetErrorString("No expressions currently active on this thread"); |
| return error; |
| } |
| |
| |
| ThreadPlan * |
| Thread::QueueFundamentalPlan (bool abort_other_plans) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanBase(*this)); |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepSingleInstruction |
| ( |
| bool step_over, |
| bool abort_other_plans, |
| bool stop_other_threads |
| ) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanStepInstruction (*this, step_over, stop_other_threads, eVoteNoOpinion, eVoteNoOpinion)); |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepOverRange |
| ( |
| bool abort_other_plans, |
| const AddressRange &range, |
| const SymbolContext &addr_context, |
| lldb::RunMode stop_other_threads |
| ) |
| { |
| ThreadPlanSP thread_plan_sp; |
| thread_plan_sp.reset (new ThreadPlanStepOverRange (*this, range, addr_context, stop_other_threads)); |
| |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepInRange |
| ( |
| bool abort_other_plans, |
| const AddressRange &range, |
| const SymbolContext &addr_context, |
| const char *step_in_target, |
| lldb::RunMode stop_other_threads, |
| bool avoid_code_without_debug_info |
| ) |
| { |
| ThreadPlanSP thread_plan_sp; |
| ThreadPlanStepInRange *plan = new ThreadPlanStepInRange (*this, range, addr_context, stop_other_threads); |
| if (avoid_code_without_debug_info) |
| plan->GetFlags().Set (ThreadPlanShouldStopHere::eAvoidNoDebug); |
| else |
| plan->GetFlags().Clear (ThreadPlanShouldStopHere::eAvoidNoDebug); |
| if (step_in_target) |
| plan->SetStepInTarget(step_in_target); |
| thread_plan_sp.reset (plan); |
| |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepOverBreakpointPlan (bool abort_other_plans) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanStepOverBreakpoint (*this)); |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepOut |
| ( |
| bool abort_other_plans, |
| SymbolContext *addr_context, |
| bool first_insn, |
| bool stop_other_threads, |
| Vote stop_vote, |
| Vote run_vote, |
| uint32_t frame_idx |
| ) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanStepOut (*this, |
| addr_context, |
| first_insn, |
| stop_other_threads, |
| stop_vote, |
| run_vote, |
| frame_idx)); |
| |
| if (thread_plan_sp->ValidatePlan(NULL)) |
| { |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| else |
| { |
| return NULL; |
| } |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepThrough (StackID &return_stack_id, bool abort_other_plans, bool stop_other_threads) |
| { |
| ThreadPlanSP thread_plan_sp(new ThreadPlanStepThrough (*this, return_stack_id, stop_other_threads)); |
| if (!thread_plan_sp || !thread_plan_sp->ValidatePlan (NULL)) |
| return NULL; |
| |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForCallFunction (bool abort_other_plans, |
| Address& function, |
| lldb::addr_t arg, |
| bool stop_other_threads, |
| bool unwind_on_error, |
| bool ignore_breakpoints) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanCallFunction (*this, |
| function, |
| ClangASTType(), |
| arg, |
| stop_other_threads, |
| unwind_on_error, |
| ignore_breakpoints)); |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForRunToAddress (bool abort_other_plans, |
| Address &target_addr, |
| bool stop_other_threads) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanRunToAddress (*this, target_addr, stop_other_threads)); |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| } |
| |
| ThreadPlan * |
| Thread::QueueThreadPlanForStepUntil (bool abort_other_plans, |
| lldb::addr_t *address_list, |
| size_t num_addresses, |
| bool stop_other_threads, |
| uint32_t frame_idx) |
| { |
| ThreadPlanSP thread_plan_sp (new ThreadPlanStepUntil (*this, address_list, num_addresses, stop_other_threads, frame_idx)); |
| QueueThreadPlan (thread_plan_sp, abort_other_plans); |
| return thread_plan_sp.get(); |
| |
| } |
| |
| uint32_t |
| Thread::GetIndexID () const |
| { |
| return m_index_id; |
| } |
| |
| void |
| Thread::DumpThreadPlans (lldb_private::Stream *s) const |
| { |
| uint32_t stack_size = m_plan_stack.size(); |
| int i; |
| s->Indent(); |
| s->Printf ("Plan Stack for thread #%u: tid = 0x%4.4" PRIx64 ", stack_size = %d\n", GetIndexID(), GetID(), stack_size); |
| for (i = stack_size - 1; i >= 0; i--) |
| { |
| s->IndentMore(); |
| s->Indent(); |
| s->Printf ("Element %d: ", i); |
| m_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); |
| s->EOL(); |
| s->IndentLess(); |
| } |
| |
| stack_size = m_completed_plan_stack.size(); |
| if (stack_size > 0) |
| { |
| s->Indent(); |
| s->Printf ("Completed Plan Stack: %d elements.\n", stack_size); |
| for (i = stack_size - 1; i >= 0; i--) |
| { |
| s->IndentMore(); |
| s->Indent(); |
| s->Printf ("Element %d: ", i); |
| m_completed_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); |
| s->EOL(); |
| s->IndentLess(); |
| } |
| } |
| |
| stack_size = m_discarded_plan_stack.size(); |
| if (stack_size > 0) |
| { |
| s->Indent(); |
| s->Printf ("Discarded Plan Stack: %d elements.\n", stack_size); |
| for (i = stack_size - 1; i >= 0; i--) |
| { |
| s->IndentMore(); |
| s->Indent(); |
| s->Printf ("Element %d: ", i); |
| m_discarded_plan_stack[i]->GetDescription (s, eDescriptionLevelFull); |
| s->EOL(); |
| s->IndentLess(); |
| } |
| } |
| |
| } |
| |
| TargetSP |
| Thread::CalculateTarget () |
| { |
| TargetSP target_sp; |
| ProcessSP process_sp(GetProcess()); |
| if (process_sp) |
| target_sp = process_sp->CalculateTarget(); |
| return target_sp; |
| |
| } |
| |
| ProcessSP |
| Thread::CalculateProcess () |
| { |
| return GetProcess(); |
| } |
| |
| ThreadSP |
| Thread::CalculateThread () |
| { |
| return shared_from_this(); |
| } |
| |
| StackFrameSP |
| Thread::CalculateStackFrame () |
| { |
| return StackFrameSP(); |
| } |
| |
| void |
| Thread::CalculateExecutionContext (ExecutionContext &exe_ctx) |
| { |
| exe_ctx.SetContext (shared_from_this()); |
| } |
| |
| |
| StackFrameListSP |
| Thread::GetStackFrameList () |
| { |
| StackFrameListSP frame_list_sp; |
| Mutex::Locker locker(m_frame_mutex); |
| if (m_curr_frames_sp) |
| { |
| frame_list_sp = m_curr_frames_sp; |
| } |
| else |
| { |
| frame_list_sp.reset(new StackFrameList (*this, m_prev_frames_sp, true)); |
| m_curr_frames_sp = frame_list_sp; |
| } |
| return frame_list_sp; |
| } |
| |
| void |
| Thread::ClearStackFrames () |
| { |
| Mutex::Locker locker(m_frame_mutex); |
| |
| Unwind *unwinder = GetUnwinder (); |
| if (unwinder) |
| unwinder->Clear(); |
| |
| // Only store away the old "reference" StackFrameList if we got all its frames: |
| // FIXME: At some point we can try to splice in the frames we have fetched into |
| // the new frame as we make it, but let's not try that now. |
| if (m_curr_frames_sp && m_curr_frames_sp->GetAllFramesFetched()) |
| m_prev_frames_sp.swap (m_curr_frames_sp); |
| m_curr_frames_sp.reset(); |
| } |
| |
| lldb::StackFrameSP |
| Thread::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) |
| { |
| return GetStackFrameList()->GetFrameWithConcreteFrameIndex (unwind_idx); |
| } |
| |
| |
| Error |
| Thread::ReturnFromFrameWithIndex (uint32_t frame_idx, lldb::ValueObjectSP return_value_sp, bool broadcast) |
| { |
| StackFrameSP frame_sp = GetStackFrameAtIndex (frame_idx); |
| Error return_error; |
| |
| if (!frame_sp) |
| { |
| return_error.SetErrorStringWithFormat("Could not find frame with index %d in thread 0x%" PRIx64 ".", frame_idx, GetID()); |
| } |
| |
| return ReturnFromFrame(frame_sp, return_value_sp, broadcast); |
| } |
| |
| Error |
| Thread::ReturnFromFrame (lldb::StackFrameSP frame_sp, lldb::ValueObjectSP return_value_sp, bool broadcast) |
| { |
| Error return_error; |
| |
| if (!frame_sp) |
| { |
| return_error.SetErrorString("Can't return to a null frame."); |
| return return_error; |
| } |
| |
| Thread *thread = frame_sp->GetThread().get(); |
| uint32_t older_frame_idx = frame_sp->GetFrameIndex() + 1; |
| StackFrameSP older_frame_sp = thread->GetStackFrameAtIndex(older_frame_idx); |
| if (!older_frame_sp) |
| { |
| return_error.SetErrorString("No older frame to return to."); |
| return return_error; |
| } |
| |
| if (return_value_sp) |
| { |
| lldb::ABISP abi = thread->GetProcess()->GetABI(); |
| if (!abi) |
| { |
| return_error.SetErrorString("Could not find ABI to set return value."); |
| return return_error; |
| } |
| SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextFunction); |
| |
| // FIXME: ValueObject::Cast doesn't currently work correctly, at least not for scalars. |
| // Turn that back on when that works. |
| if (0 && sc.function != NULL) |
| { |
| Type *function_type = sc.function->GetType(); |
| if (function_type) |
| { |
| clang_type_t return_type = sc.function->GetReturnClangType(); |
| if (return_type) |
| { |
| ClangASTType ast_type (function_type->GetClangAST(), return_type); |
| StreamString s; |
| ast_type.DumpTypeDescription(&s); |
| ValueObjectSP cast_value_sp = return_value_sp->Cast(ast_type); |
| if (cast_value_sp) |
| { |
| cast_value_sp->SetFormat(eFormatHex); |
| return_value_sp = cast_value_sp; |
| } |
| } |
| } |
| } |
| |
| return_error = abi->SetReturnValueObject(older_frame_sp, return_value_sp); |
| if (!return_error.Success()) |
| return return_error; |
| } |
| |
| // Now write the return registers for the chosen frame: |
| // Note, we can't use ReadAllRegisterValues->WriteAllRegisterValues, since the read & write |
| // cook their data |
| |
| StackFrameSP youngest_frame_sp = thread->GetStackFrameAtIndex(0); |
| if (youngest_frame_sp) |
| { |
| lldb::RegisterContextSP reg_ctx_sp (youngest_frame_sp->GetRegisterContext()); |
| if (reg_ctx_sp) |
| { |
| bool copy_success = reg_ctx_sp->CopyFromRegisterContext(older_frame_sp->GetRegisterContext()); |
| if (copy_success) |
| { |
| thread->DiscardThreadPlans(true); |
| thread->ClearStackFrames(); |
| if (broadcast && EventTypeHasListeners(eBroadcastBitStackChanged)) |
| BroadcastEvent(eBroadcastBitStackChanged, new ThreadEventData (this->shared_from_this())); |
| } |
| else |
| { |
| return_error.SetErrorString("Could not reset register values."); |
| } |
| } |
| else |
| { |
| return_error.SetErrorString("Frame has no register context."); |
| } |
| } |
| else |
| { |
| return_error.SetErrorString("Returned past top frame."); |
| } |
| return return_error; |
| } |
| |
| void |
| Thread::DumpUsingSettingsFormat (Stream &strm, uint32_t frame_idx) |
| { |
| ExecutionContext exe_ctx (shared_from_this()); |
| Process *process = exe_ctx.GetProcessPtr(); |
| if (process == NULL) |
| return; |
| |
| StackFrameSP frame_sp; |
| SymbolContext frame_sc; |
| if (frame_idx != LLDB_INVALID_INDEX32) |
| { |
| frame_sp = GetStackFrameAtIndex (frame_idx); |
| if (frame_sp) |
| { |
| exe_ctx.SetFrameSP(frame_sp); |
| frame_sc = frame_sp->GetSymbolContext(eSymbolContextEverything); |
| } |
| } |
| |
| const char *thread_format = exe_ctx.GetTargetRef().GetDebugger().GetThreadFormat(); |
| assert (thread_format); |
| Debugger::FormatPrompt (thread_format, |
| frame_sp ? &frame_sc : NULL, |
| &exe_ctx, |
| NULL, |
| strm); |
| } |
| |
| void |
| Thread::SettingsInitialize () |
| { |
| } |
| |
| void |
| Thread::SettingsTerminate () |
| { |
| } |
| |
| lldb::StackFrameSP |
| Thread::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) |
| { |
| return GetStackFrameList()->GetStackFrameSPForStackFramePtr (stack_frame_ptr); |
| } |
| |
| const char * |
| Thread::StopReasonAsCString (lldb::StopReason reason) |
| { |
| switch (reason) |
| { |
| case eStopReasonInvalid: return "invalid"; |
| case eStopReasonNone: return "none"; |
| case eStopReasonTrace: return "trace"; |
| case eStopReasonBreakpoint: return "breakpoint"; |
| case eStopReasonWatchpoint: return "watchpoint"; |
| case eStopReasonSignal: return "signal"; |
| case eStopReasonException: return "exception"; |
| case eStopReasonExec: return "exec"; |
| case eStopReasonPlanComplete: return "plan complete"; |
| case eStopReasonThreadExiting: return "thread exiting"; |
| } |
| |
| |
| static char unknown_state_string[64]; |
| snprintf(unknown_state_string, sizeof (unknown_state_string), "StopReason = %i", reason); |
| return unknown_state_string; |
| } |
| |
| const char * |
| Thread::RunModeAsCString (lldb::RunMode mode) |
| { |
| switch (mode) |
| { |
| case eOnlyThisThread: return "only this thread"; |
| case eAllThreads: return "all threads"; |
| case eOnlyDuringStepping: return "only during stepping"; |
| } |
| |
| static char unknown_state_string[64]; |
| snprintf(unknown_state_string, sizeof (unknown_state_string), "RunMode = %i", mode); |
| return unknown_state_string; |
| } |
| |
| size_t |
| Thread::GetStatus (Stream &strm, uint32_t start_frame, uint32_t num_frames, uint32_t num_frames_with_source) |
| { |
| ExecutionContext exe_ctx (shared_from_this()); |
| Target *target = exe_ctx.GetTargetPtr(); |
| Process *process = exe_ctx.GetProcessPtr(); |
| size_t num_frames_shown = 0; |
| strm.Indent(); |
| bool is_selected = false; |
| if (process) |
| { |
| if (process->GetThreadList().GetSelectedThread().get() == this) |
| is_selected = true; |
| } |
| strm.Printf("%c ", is_selected ? '*' : ' '); |
| if (target && target->GetDebugger().GetUseExternalEditor()) |
| { |
| StackFrameSP frame_sp = GetStackFrameAtIndex(start_frame); |
| if (frame_sp) |
| { |
| SymbolContext frame_sc(frame_sp->GetSymbolContext (eSymbolContextLineEntry)); |
| if (frame_sc.line_entry.line != 0 && frame_sc.line_entry.file) |
| { |
| Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); |
| } |
| } |
| } |
| |
| DumpUsingSettingsFormat (strm, start_frame); |
| |
| if (num_frames > 0) |
| { |
| strm.IndentMore(); |
| |
| const bool show_frame_info = true; |
| strm.IndentMore (); |
| num_frames_shown = GetStackFrameList ()->GetStatus (strm, |
| start_frame, |
| num_frames, |
| show_frame_info, |
| num_frames_with_source); |
| strm.IndentLess(); |
| strm.IndentLess(); |
| } |
| return num_frames_shown; |
| } |
| |
| size_t |
| Thread::GetStackFrameStatus (Stream& strm, |
| uint32_t first_frame, |
| uint32_t num_frames, |
| bool show_frame_info, |
| uint32_t num_frames_with_source) |
| { |
| return GetStackFrameList()->GetStatus (strm, |
| first_frame, |
| num_frames, |
| show_frame_info, |
| num_frames_with_source); |
| } |
| |
| bool |
| Thread::SaveFrameZeroState (RegisterCheckpoint &checkpoint) |
| { |
| lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); |
| if (frame_sp) |
| { |
| checkpoint.SetStackID(frame_sp->GetStackID()); |
| lldb::RegisterContextSP reg_ctx_sp (frame_sp->GetRegisterContext()); |
| if (reg_ctx_sp) |
| return reg_ctx_sp->ReadAllRegisterValues (checkpoint.GetData()); |
| } |
| return false; |
| } |
| |
| bool |
| Thread::RestoreSaveFrameZero (const RegisterCheckpoint &checkpoint) |
| { |
| return ResetFrameZeroRegisters (checkpoint.GetData()); |
| } |
| |
| bool |
| Thread::ResetFrameZeroRegisters (lldb::DataBufferSP register_data_sp) |
| { |
| lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0)); |
| if (frame_sp) |
| { |
| lldb::RegisterContextSP reg_ctx_sp (frame_sp->GetRegisterContext()); |
| if (reg_ctx_sp) |
| { |
| bool ret = reg_ctx_sp->WriteAllRegisterValues (register_data_sp); |
| |
| // Clear out all stack frames as our world just changed. |
| ClearStackFrames(); |
| reg_ctx_sp->InvalidateIfNeeded(true); |
| if (m_unwinder_ap.get()) |
| m_unwinder_ap->Clear(); |
| return ret; |
| } |
| } |
| return false; |
| } |
| |
| Unwind * |
| Thread::GetUnwinder () |
| { |
| if (m_unwinder_ap.get() == NULL) |
| { |
| const ArchSpec target_arch (CalculateTarget()->GetArchitecture ()); |
| const llvm::Triple::ArchType machine = target_arch.GetMachine(); |
| switch (machine) |
| { |
| case llvm::Triple::x86_64: |
| case llvm::Triple::x86: |
| case llvm::Triple::arm: |
| case llvm::Triple::thumb: |
| m_unwinder_ap.reset (new UnwindLLDB (*this)); |
| break; |
| |
| default: |
| if (target_arch.GetTriple().getVendor() == llvm::Triple::Apple) |
| m_unwinder_ap.reset (new UnwindMacOSXFrameBackchain (*this)); |
| break; |
| } |
| } |
| return m_unwinder_ap.get(); |
| } |
| |
| |
| void |
| Thread::Flush () |
| { |
| ClearStackFrames (); |
| m_reg_context_sp.reset(); |
| } |
| |
| bool |
| Thread::IsStillAtLastBreakpointHit () |
| { |
| // If we are currently stopped at a breakpoint, always return that stopinfo and don't reset it. |
| // This allows threads to maintain their breakpoint stopinfo, such as when thread-stepping in |
| // multithreaded programs. |
| if (m_stop_info_sp) { |
| StopReason stop_reason = m_stop_info_sp->GetStopReason(); |
| if (stop_reason == lldb::eStopReasonBreakpoint) { |
| uint64_t value = m_stop_info_sp->GetValue(); |
| lldb::RegisterContextSP reg_ctx_sp (GetRegisterContext()); |
| if (reg_ctx_sp) |
| { |
| lldb::addr_t pc = reg_ctx_sp->GetPC(); |
| BreakpointSiteSP bp_site_sp = GetProcess()->GetBreakpointSiteList().FindByAddress(pc); |
| if (bp_site_sp && value == bp_site_sp->GetID()) |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
