5160ce5c72
LLDB is crashing when logging is enabled from lldb-perf-clang. This has to do with the global destructor chain as the process and its threads are being torn down. All logging channels now make one and only one instance that is kept in a global pointer which is never freed. This guarantees that logging can correctly continue as the process tears itself down. llvm-svn: 178191
152 lines
4.3 KiB
C++
152 lines
4.3 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 %" PRIu64 " at 0x%" PRIx64, 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 (Event *event_ptr)
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{
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StopInfoSP stop_info_sp = GetPrivateStopReason();
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if (stop_info_sp)
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{
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StopReason reason = stop_info_sp->GetStopReason();
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if (reason == eStopReasonTrace || reason == eStopReasonNone)
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return true;
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else
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return false;
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}
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return false;
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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::GetPlanRunState ()
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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()->DisableBreakpointSite (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()->EnableBreakpointSite (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()->EnableBreakpointSite (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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