1 files changed, 197 insertions, 0 deletions
diff --git a/lldb/source/Target/ThreadPlanBase.cpp b/lldb/source/Target/ThreadPlanBase.cpp
new file mode 100644
index 000000000000..821643d4bce5
--- /dev/null
+++ b/lldb/source/Target/ThreadPlanBase.cpp
@@ -0,0 +1,197 @@
+//===-- ThreadPlanBase.cpp --------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Target/ThreadPlanBase.h"
+
+//
+#include "lldb/Breakpoint/Breakpoint.h"
+#include "lldb/Breakpoint/BreakpointLocation.h"
+#include "lldb/Breakpoint/BreakpointSite.h"
+#include "lldb/Breakpoint/StoppointCallbackContext.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/Stream.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.
+  return !TracerExplainsStop();
+}
+
+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.
+        LLDB_LOGF(
+            log,
+            "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.
+      LLDB_LOGF(
+          log,
+          "Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
+          " (exception: %s)",
+          m_thread.GetID(), stop_info_sp->GetDescription());
+      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.
+      LLDB_LOGF(
+          log,
+          "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)) {
+        LLDB_LOGF(
+            log,
+            "Base plan discarding thread plans for thread tid = 0x%4.4" PRIx64
+            " (signal: %s)",
+            m_thread.GetID(), stop_info_sp->GetDescription());
+        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;
+}