Merge lldb r188801 to contrib/llvm/tools/lldb/

1 files changed, 237 insertions, 0 deletions

diff --git a/contrib/llvm/tools/lldb/source/Target/ThreadPlanBase.cpp b/contrib/llvm/tools/lldb/source/Target/ThreadPlanBase.cpp
new file mode 100644
index 0000000..240f23a
--- /dev/null
+++ b/contrib/llvm/tools/lldb/source/Target/ThreadPlanBase.cpp
@@ -0,0 +1,237 @@
+//===-- ThreadPlanBase.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/Target/ThreadPlanBase.h"
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+//
+#include "lldb/Breakpoint/StoppointCallbackContext.h"
+#include "lldb/Breakpoint/BreakpointSite.h"
+#include "lldb/Breakpoint/BreakpointLocation.h"
+#include "lldb/Breakpoint/Breakpoint.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/Stream.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StopInfo.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+//----------------------------------------------------------------------
+// ThreadPlanBase: This one always stops, and never has anything particular
+// to do.
+// FIXME: The "signal handling" policies should probably go here.
+//----------------------------------------------------------------------
+
+ThreadPlanBase::ThreadPlanBase (Thread &thread) :
+    ThreadPlan(ThreadPlan::eKindBase, "base plan", thread, eVoteYes, eVoteNoOpinion)
+{
+    // Set the tracer to a default tracer.
+    // FIXME: need to add a thread settings variable to pix various tracers...
+#define THREAD_PLAN_USE_ASSEMBLY_TRACER 1
+
+#ifdef THREAD_PLAN_USE_ASSEMBLY_TRACER
+    ThreadPlanTracerSP new_tracer_sp (new ThreadPlanAssemblyTracer (m_thread));
+#else
+    ThreadPlanTracerSP new_tracer_sp (new ThreadPlanTracer (m_thread));
+#endif
+    new_tracer_sp->EnableTracing (m_thread.GetTraceEnabledState());
+    SetThreadPlanTracer(new_tracer_sp);
+    SetIsMasterPlan (true);
+}
+
+ThreadPlanBase::~ThreadPlanBase ()
+{
+
+}
+
+void
+ThreadPlanBase::GetDescription (Stream *s, lldb::DescriptionLevel level)
+{
+    s->Printf ("Base thread plan.");
+}
+
+bool
+ThreadPlanBase::ValidatePlan (Stream *error)
+{
+    return true;
+}
+
+bool
+ThreadPlanBase::DoPlanExplainsStop (Event *event_ptr)
+{
+    // The base plan should defer to its tracer, since by default it
+    // always handles the stop.
+    if (TracerExplainsStop())
+        return false;
+    else
+        return true;
+}
+
+Vote
+ThreadPlanBase::ShouldReportStop(Event *event_ptr)
+{
+    StopInfoSP stop_info_sp = m_thread.GetStopInfo ();
+    if (stop_info_sp)
+    {
+        bool should_notify = stop_info_sp->ShouldNotify(event_ptr);
+        if (should_notify)
+            return eVoteYes;
+        else
+            return eVoteNoOpinion;
+    }
+    else
+        return eVoteNoOpinion;
+}
+
+bool
+ThreadPlanBase::ShouldStop (Event *event_ptr)
+{
+    m_stop_vote = eVoteYes;
+    m_run_vote = eVoteYes;
+
+    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
+
+    StopInfoSP stop_info_sp = GetPrivateStopInfo ();
+    if (stop_info_sp)
+    {
+        StopReason reason = stop_info_sp->GetStopReason ();
+        switch (reason)
+        {
+        case eStopReasonInvalid:
+        case eStopReasonNone:
+            // This 
+            m_run_vote = eVoteNoOpinion;
+            m_stop_vote = eVoteNo;
+            return false;
+
+        case eStopReasonBreakpoint:
+        case eStopReasonWatchpoint:
+            if (stop_info_sp->ShouldStopSynchronous(event_ptr))
+            {
+                // If we are going to stop for a breakpoint, then unship the other plans
+                // at this point.  Don't force the discard, however, so Master plans can stay
+                // in place if they want to.
+                if (log)
+                    log->Printf("Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64 " (breakpoint hit.)", m_thread.GetID());
+                m_thread.DiscardThreadPlans(false);
+                return true;
+            }
+            // If we aren't going to stop at this breakpoint, and it is internal, 
+            // don't report this stop or the subsequent running event.  
+            // Otherwise we will post the stopped & running, but the stopped event will get marked
+            // with "restarted" so the UI will know to wait and expect the consequent "running".
+            if (stop_info_sp->ShouldNotify (event_ptr))
+            {
+                m_stop_vote = eVoteYes;
+                m_run_vote = eVoteYes;
+            }
+            else
+            {
+                m_stop_vote = eVoteNo;
+                m_run_vote = eVoteNo;
+            }
+            return false;
+
+            // TODO: the break below was missing, was this intentional??? If so
+            // please mention it
+            break;
+
+        case eStopReasonException:
+            // If we crashed, discard thread plans and stop.  Don't force the discard, however,
+            // since on rerun the target may clean up this exception and continue normally from there.
+                if (log)
+                    log->Printf("Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64 " (exception.)", m_thread.GetID());
+            m_thread.DiscardThreadPlans(false);
+            return true;
+
+        case eStopReasonExec:
+            // If we crashed, discard thread plans and stop.  Don't force the discard, however,
+            // since on rerun the target may clean up this exception and continue normally from there.
+            if (log)
+                log->Printf("Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64 " (exec.)", m_thread.GetID());
+            m_thread.DiscardThreadPlans(false);
+            return true;
+
+        case eStopReasonThreadExiting:
+        case eStopReasonSignal:
+            if (stop_info_sp->ShouldStop(event_ptr))
+            {
+                if (log)
+                    log->Printf("Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64 " (signal.)", m_thread.GetID());
+                m_thread.DiscardThreadPlans(false);
+                return true;
+            }
+            else
+            {
+                // We're not going to stop, but while we are here, let's figure out
+                // whether to report this.
+                 if (stop_info_sp->ShouldNotify(event_ptr))
+                    m_stop_vote = eVoteYes;
+                else
+                    m_stop_vote = eVoteNo;
+            }
+            return false;
+            
+        default:
+            return true;
+        }
+
+    }
+    else
+    {
+        m_run_vote = eVoteNoOpinion;
+        m_stop_vote = eVoteNo;
+    }
+
+    // If there's no explicit reason to stop, then we will continue.
+    return false;
+}
+
+bool
+ThreadPlanBase::StopOthers ()
+{
+    return false;
+}
+
+StateType
+ThreadPlanBase::GetPlanRunState ()
+{
+    return eStateRunning;
+}
+
+bool
+ThreadPlanBase::WillStop ()
+{
+    return true;
+}
+
+bool 
+ThreadPlanBase::DoWillResume (lldb::StateType resume_state, bool current_plan)
+{
+    // Reset these to the default values so we don't set them wrong, then not get asked
+    // for a while, then return the wrong answer.
+    m_run_vote = eVoteNoOpinion;
+    m_stop_vote = eVoteNo;
+    return true;
+}
+
+
+// The base plan is never done.
+bool
+ThreadPlanBase::MischiefManaged ()
+{
+    // The base plan is never done.
+    return false;
+}
+