b01e742af7
without having to use RTTI. Removed the ThreadPlanContinue and replaced with a ShouldAutoContinue query that serves the same purpose. Having to push another plan to assert that if there's no other indication the target should continue when this plan is popped was flakey and error prone. This method is more stable, and fixed problems we were having with thread specific breakpoints. llvm-svn: 106378
144 lines
4.0 KiB
C++
144 lines
4.0 KiB
C++
//===-- ThreadPlanStepOverBreakpoint.cpp ------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Target/ThreadPlanStepOverBreakpoint.h"
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/lldb-private-log.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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using namespace lldb;
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using namespace lldb_private;
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//----------------------------------------------------------------------
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// ThreadPlanStepOverBreakpoint: Single steps over a breakpoint bp_site_sp at the pc.
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//----------------------------------------------------------------------
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ThreadPlanStepOverBreakpoint::ThreadPlanStepOverBreakpoint (Thread &thread) :
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ThreadPlan (ThreadPlan::eKindStepOverBreakpoint, "Step over breakpoint trap",
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thread,
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eVoteNo,
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eVoteNoOpinion), // We need to report the run since this happens
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// first in the thread plan stack when stepping
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// over a breakpoint
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m_breakpoint_addr (LLDB_INVALID_ADDRESS),
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m_auto_continue(false)
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{
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m_breakpoint_addr = m_thread.GetRegisterContext()->GetPC();
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m_breakpoint_site_id = m_thread.GetProcess().GetBreakpointSiteList().FindIDByAddress (m_breakpoint_addr);
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}
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ThreadPlanStepOverBreakpoint::~ThreadPlanStepOverBreakpoint ()
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{
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}
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void
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ThreadPlanStepOverBreakpoint::GetDescription (Stream *s, lldb::DescriptionLevel level)
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{
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s->Printf("Single stepping past breakpoint site %d at 0x%llx", m_breakpoint_site_id, (uint64_t)m_breakpoint_addr);
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}
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bool
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ThreadPlanStepOverBreakpoint::ValidatePlan (Stream *error)
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{
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return true;
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}
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bool
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ThreadPlanStepOverBreakpoint::PlanExplainsStop ()
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{
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return true;
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}
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bool
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ThreadPlanStepOverBreakpoint::ShouldStop (Event *event_ptr)
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{
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return false;
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}
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bool
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ThreadPlanStepOverBreakpoint::StopOthers ()
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{
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return true;
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}
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StateType
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ThreadPlanStepOverBreakpoint::RunState ()
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{
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return eStateStepping;
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}
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bool
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ThreadPlanStepOverBreakpoint::WillResume (StateType resume_state, bool current_plan)
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{
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ThreadPlan::WillResume (resume_state, current_plan);
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if (current_plan)
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{
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BreakpointSiteSP bp_site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByAddress (m_breakpoint_addr));
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if (bp_site_sp && bp_site_sp->IsEnabled())
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m_thread.GetProcess().DisableBreakpoint (bp_site_sp.get());
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}
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return true;
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}
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bool
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ThreadPlanStepOverBreakpoint::WillStop ()
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{
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BreakpointSiteSP bp_site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByAddress (m_breakpoint_addr));
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if (bp_site_sp)
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m_thread.GetProcess().EnableBreakpoint (bp_site_sp.get());
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return true;
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}
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bool
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ThreadPlanStepOverBreakpoint::MischiefManaged ()
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{
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lldb::addr_t pc_addr = m_thread.GetRegisterContext()->GetPC();
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if (pc_addr == m_breakpoint_addr)
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{
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// If we are still at the PC of our breakpoint, then for some reason we didn't
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// get a chance to run.
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return false;
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}
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else
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{
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Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP);
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if (log)
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log->Printf("Completed step over breakpoint plan.");
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// Otherwise, re-enable the breakpoint we were stepping over, and we're done.
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BreakpointSiteSP bp_site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByAddress (m_breakpoint_addr));
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if (bp_site_sp)
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m_thread.GetProcess().EnableBreakpoint (bp_site_sp.get());
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ThreadPlan::MischiefManaged ();
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return true;
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}
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}
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void
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ThreadPlanStepOverBreakpoint::SetAutoContinue (bool do_it)
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{
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m_auto_continue = do_it;
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}
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bool
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ThreadPlanStepOverBreakpoint::ShouldAutoContinue (Event *event_ptr)
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{
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return m_auto_continue;
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}
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