| //===-- ThreadPlanStepUntil.cpp ---------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| //m_should_stop |
| |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Target/ThreadPlanStepUntil.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Breakpoint/Breakpoint.h" |
| #include "lldb/lldb-private-log.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/RegisterContext.h" |
| #include "lldb/Target/StopInfo.h" |
| #include "lldb/Target/Target.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| //---------------------------------------------------------------------- |
| // ThreadPlanStepUntil: Run until we reach a given line number or step out of the current frame |
| //---------------------------------------------------------------------- |
| |
| ThreadPlanStepUntil::ThreadPlanStepUntil |
| ( |
| Thread &thread, |
| lldb::addr_t *address_list, |
| size_t num_addresses, |
| bool stop_others, |
| uint32_t frame_idx |
| ) : |
| ThreadPlan (ThreadPlan::eKindStepUntil, "Step until", thread, eVoteNoOpinion, eVoteNoOpinion), |
| m_step_from_insn (LLDB_INVALID_ADDRESS), |
| m_return_bp_id (LLDB_INVALID_BREAK_ID), |
| m_return_addr (LLDB_INVALID_ADDRESS), |
| m_stepped_out (false), |
| m_should_stop (false), |
| m_ran_analyze (false), |
| m_explains_stop (false), |
| m_until_points (), |
| m_stop_others (stop_others) |
| { |
| // Stash away our "until" addresses: |
| TargetSP target_sp (m_thread.CalculateTarget()); |
| |
| StackFrameSP frame_sp (m_thread.GetStackFrameAtIndex (frame_idx)); |
| if (frame_sp) |
| { |
| m_step_from_insn = frame_sp->GetStackID().GetPC(); |
| lldb::user_id_t thread_id = m_thread.GetID(); |
| |
| // Find the return address and set a breakpoint there: |
| // FIXME - can we do this more securely if we know first_insn? |
| |
| StackFrameSP return_frame_sp (m_thread.GetStackFrameAtIndex(frame_idx + 1)); |
| if (return_frame_sp) |
| { |
| // TODO: add inline functionality |
| m_return_addr = return_frame_sp->GetStackID().GetPC(); |
| Breakpoint *return_bp = target_sp->CreateBreakpoint (m_return_addr, true, false).get(); |
| if (return_bp != NULL) |
| { |
| return_bp->SetThreadID(thread_id); |
| m_return_bp_id = return_bp->GetID(); |
| return_bp->SetBreakpointKind ("until-return-backstop"); |
| } |
| } |
| |
| m_stack_id = m_thread.GetStackFrameAtIndex(frame_idx)->GetStackID(); |
| |
| // Now set breakpoints on all our return addresses: |
| for (size_t i = 0; i < num_addresses; i++) |
| { |
| Breakpoint *until_bp = target_sp->CreateBreakpoint (address_list[i], true, false).get(); |
| if (until_bp != NULL) |
| { |
| until_bp->SetThreadID(thread_id); |
| m_until_points[address_list[i]] = until_bp->GetID(); |
| until_bp->SetBreakpointKind("until-target"); |
| } |
| else |
| { |
| m_until_points[address_list[i]] = LLDB_INVALID_BREAK_ID; |
| } |
| } |
| } |
| } |
| |
| ThreadPlanStepUntil::~ThreadPlanStepUntil () |
| { |
| Clear(); |
| } |
| |
| void |
| ThreadPlanStepUntil::Clear() |
| { |
| TargetSP target_sp (m_thread.CalculateTarget()); |
| if (target_sp) |
| { |
| if (m_return_bp_id != LLDB_INVALID_BREAK_ID) |
| { |
| target_sp->RemoveBreakpointByID(m_return_bp_id); |
| m_return_bp_id = LLDB_INVALID_BREAK_ID; |
| } |
| |
| until_collection::iterator pos, end = m_until_points.end(); |
| for (pos = m_until_points.begin(); pos != end; pos++) |
| { |
| target_sp->RemoveBreakpointByID((*pos).second); |
| } |
| } |
| m_until_points.clear(); |
| } |
| |
| void |
| ThreadPlanStepUntil::GetDescription (Stream *s, lldb::DescriptionLevel level) |
| { |
| if (level == lldb::eDescriptionLevelBrief) |
| { |
| s->Printf ("step until"); |
| if (m_stepped_out) |
| s->Printf (" - stepped out"); |
| } |
| else |
| { |
| if (m_until_points.size() == 1) |
| s->Printf ("Stepping from address 0x%" PRIx64 " until we reach 0x%" PRIx64 " using breakpoint %d", |
| (uint64_t)m_step_from_insn, |
| (uint64_t) (*m_until_points.begin()).first, |
| (*m_until_points.begin()).second); |
| else |
| { |
| until_collection::iterator pos, end = m_until_points.end(); |
| s->Printf ("Stepping from address 0x%" PRIx64 " until we reach one of:", |
| (uint64_t)m_step_from_insn); |
| for (pos = m_until_points.begin(); pos != end; pos++) |
| { |
| s->Printf ("\n\t0x%" PRIx64 " (bp: %d)", (uint64_t) (*pos).first, (*pos).second); |
| } |
| } |
| s->Printf(" stepped out address is 0x%" PRIx64 ".", (uint64_t) m_return_addr); |
| } |
| } |
| |
| bool |
| ThreadPlanStepUntil::ValidatePlan (Stream *error) |
| { |
| if (m_return_bp_id == LLDB_INVALID_BREAK_ID) |
| return false; |
| else |
| { |
| until_collection::iterator pos, end = m_until_points.end(); |
| for (pos = m_until_points.begin(); pos != end; pos++) |
| { |
| if (!LLDB_BREAK_ID_IS_VALID ((*pos).second)) |
| return false; |
| } |
| return true; |
| } |
| } |
| |
| void |
| ThreadPlanStepUntil::AnalyzeStop() |
| { |
| if (m_ran_analyze) |
| return; |
| |
| StopInfoSP stop_info_sp = GetPrivateStopInfo (); |
| m_should_stop = true; |
| m_explains_stop = false; |
| |
| if (stop_info_sp) |
| { |
| StopReason reason = stop_info_sp->GetStopReason(); |
| |
| switch (reason) |
| { |
| case eStopReasonBreakpoint: |
| { |
| // If this is OUR breakpoint, we're fine, otherwise we don't know why this happened... |
| BreakpointSiteSP this_site = m_thread.GetProcess()->GetBreakpointSiteList().FindByID (stop_info_sp->GetValue()); |
| if (!this_site) |
| { |
| m_explains_stop = false; |
| return; |
| } |
| |
| if (this_site->IsBreakpointAtThisSite (m_return_bp_id)) |
| { |
| // If we are at our "step out" breakpoint, and the stack depth has shrunk, then |
| // this is indeed our stop. |
| // If the stack depth has grown, then we've hit our step out breakpoint recursively. |
| // If we are the only breakpoint at that location, then we do explain the stop, and |
| // we'll just continue. |
| // If there was another breakpoint here, then we don't explain the stop, but we won't |
| // mark ourselves Completed, because maybe that breakpoint will continue, and then |
| // we'll finish the "until". |
| bool done; |
| StackID cur_frame_zero_id; |
| |
| if (m_stack_id < cur_frame_zero_id) |
| done = true; |
| else |
| done = false; |
| |
| if (done) |
| { |
| m_stepped_out = true; |
| SetPlanComplete(); |
| } |
| else |
| m_should_stop = false; |
| |
| if (this_site->GetNumberOfOwners() == 1) |
| m_explains_stop = true; |
| else |
| m_explains_stop = false; |
| return; |
| } |
| else |
| { |
| // Check if we've hit one of our "until" breakpoints. |
| until_collection::iterator pos, end = m_until_points.end(); |
| for (pos = m_until_points.begin(); pos != end; pos++) |
| { |
| if (this_site->IsBreakpointAtThisSite ((*pos).second)) |
| { |
| // If we're at the right stack depth, then we're done. |
| |
| bool done; |
| StackID frame_zero_id = m_thread.GetStackFrameAtIndex(0)->GetStackID(); |
| |
| if (frame_zero_id == m_stack_id) |
| done = true; |
| else if (frame_zero_id < m_stack_id) |
| done = false; |
| else |
| { |
| StackFrameSP older_frame_sp = m_thread.GetStackFrameAtIndex(1); |
| |
| // But if we can't even unwind one frame we should just get out of here & stop... |
| if (older_frame_sp) |
| { |
| const SymbolContext &older_context |
| = older_frame_sp->GetSymbolContext(eSymbolContextEverything); |
| SymbolContext stack_context; |
| m_stack_id.GetSymbolContextScope()->CalculateSymbolContext(&stack_context); |
| |
| if (older_context == stack_context) |
| done = true; |
| else |
| done = false; |
| } |
| else |
| done = false; |
| } |
| |
| if (done) |
| SetPlanComplete(); |
| else |
| m_should_stop = false; |
| |
| // Otherwise we've hit this breakpoint recursively. If we're the |
| // only breakpoint here, then we do explain the stop, and we'll continue. |
| // If not then we should let higher plans handle this stop. |
| if (this_site->GetNumberOfOwners() == 1) |
| m_explains_stop = true; |
| else |
| { |
| m_should_stop = true; |
| m_explains_stop = false; |
| } |
| return; |
| } |
| } |
| } |
| // If we get here we haven't hit any of our breakpoints, so let the higher |
| // plans take care of the stop. |
| m_explains_stop = false; |
| return; |
| } |
| case eStopReasonWatchpoint: |
| case eStopReasonSignal: |
| case eStopReasonException: |
| case eStopReasonExec: |
| case eStopReasonThreadExiting: |
| m_explains_stop = false; |
| break; |
| default: |
| m_explains_stop = true; |
| break; |
| } |
| } |
| } |
| |
| bool |
| ThreadPlanStepUntil::DoPlanExplainsStop (Event *event_ptr) |
| { |
| // We don't explain signals or breakpoints (breakpoints that handle stepping in or |
| // out will be handled by a child plan. |
| AnalyzeStop(); |
| return m_explains_stop; |
| } |
| |
| bool |
| ThreadPlanStepUntil::ShouldStop (Event *event_ptr) |
| { |
| // If we've told our self in ExplainsStop that we plan to continue, then |
| // do so here. Otherwise, as long as this thread has stopped for a reason, |
| // we will stop. |
| |
| StopInfoSP stop_info_sp = GetPrivateStopInfo (); |
| if (!stop_info_sp || stop_info_sp->GetStopReason() == eStopReasonNone) |
| return false; |
| |
| AnalyzeStop(); |
| return m_should_stop; |
| } |
| |
| bool |
| ThreadPlanStepUntil::StopOthers () |
| { |
| return m_stop_others; |
| } |
| |
| StateType |
| ThreadPlanStepUntil::GetPlanRunState () |
| { |
| return eStateRunning; |
| } |
| |
| bool |
| ThreadPlanStepUntil::DoWillResume (StateType resume_state, bool current_plan) |
| { |
| if (current_plan) |
| { |
| TargetSP target_sp (m_thread.CalculateTarget()); |
| if (target_sp) |
| { |
| Breakpoint *return_bp = target_sp->GetBreakpointByID(m_return_bp_id).get(); |
| if (return_bp != NULL) |
| return_bp->SetEnabled (true); |
| |
| until_collection::iterator pos, end = m_until_points.end(); |
| for (pos = m_until_points.begin(); pos != end; pos++) |
| { |
| Breakpoint *until_bp = target_sp->GetBreakpointByID((*pos).second).get(); |
| if (until_bp != NULL) |
| until_bp->SetEnabled (true); |
| } |
| } |
| } |
| |
| m_should_stop = true; |
| m_ran_analyze = false; |
| m_explains_stop = false; |
| return true; |
| } |
| |
| bool |
| ThreadPlanStepUntil::WillStop () |
| { |
| TargetSP target_sp (m_thread.CalculateTarget()); |
| if (target_sp) |
| { |
| Breakpoint *return_bp = target_sp->GetBreakpointByID(m_return_bp_id).get(); |
| if (return_bp != NULL) |
| return_bp->SetEnabled (false); |
| |
| until_collection::iterator pos, end = m_until_points.end(); |
| for (pos = m_until_points.begin(); pos != end; pos++) |
| { |
| Breakpoint *until_bp = target_sp->GetBreakpointByID((*pos).second).get(); |
| if (until_bp != NULL) |
| until_bp->SetEnabled (false); |
| } |
| } |
| return true; |
| } |
| |
| bool |
| ThreadPlanStepUntil::MischiefManaged () |
| { |
| |
| // I'm letting "PlanExplainsStop" do all the work, and just reporting that here. |
| bool done = false; |
| if (IsPlanComplete()) |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); |
| if (log) |
| log->Printf("Completed step until plan."); |
| |
| Clear(); |
| done = true; |
| } |
| if (done) |
| ThreadPlan::MischiefManaged (); |
| |
| return done; |
| |
| } |
| |