[lldb] Construct the dummy target when the first Debugger object is constructed

Summary:
We should always have a dummy target, so we might as well construct it directly when we create a Debugger object.

The idea is that if this patch doesn't cause any problems that we can get rid of all the logic
that handles situations where we don't have a dummy target (as all that code is currently
untested as there seems to be no way to have no dummy target in LLDB).

Reviewers: labath, jingham

Reviewed By: labath, jingham

Subscribers: jingham, abidh, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D66581

llvm-svn: 369885

2 files changed, 5 insertions, 5 deletions

diff --git a/lldb/include/lldb/Core/Debugger.h b/lldb/include/lldb/Core/Debugger.h
index 8e857e009a1..2b5bf513651 100644
--- a/lldb/include/lldb/Core/Debugger.h
+++ b/lldb/include/lldb/Core/Debugger.h
@@ -311,7 +311,7 @@ public:
   // selected target, or if no target is present you want to prime the dummy
   // target with entities that will be copied over to new targets.
   Target *GetSelectedOrDummyTarget(bool prefer_dummy = false);
-  Target *GetDummyTarget();
+  Target *GetDummyTarget() { return m_dummy_target_sp.get(); }
 
   lldb::BroadcasterManagerSP GetBroadcasterManager() {
     return m_broadcaster_manager_sp;
@@ -400,6 +400,7 @@ protected:
   Broadcaster m_sync_broadcaster;
   lldb::ListenerSP m_forward_listener_sp;
   llvm::once_flag m_clear_once;
+  lldb::TargetSP m_dummy_target_sp;
 
   // Events for m_sync_broadcaster
   enum {
diff --git a/lldb/source/Core/Debugger.cpp b/lldb/source/Core/Debugger.cpp
index 513ea7a0d04..683ecefe097 100644
--- a/lldb/source/Core/Debugger.cpp
+++ b/lldb/source/Core/Debugger.cpp
@@ -721,6 +721,9 @@ Debugger::Debugger(lldb::LogOutputCallback log_callback, void *baton)
   assert(default_platform_sp);
   m_platform_list.Append(default_platform_sp, true);
 
+  m_dummy_target_sp = m_target_list.GetDummyTarget(*this);
+  assert(m_dummy_target_sp.get() && "Couldn't construct dummy target?");
+
   m_collection_sp->Initialize(g_debugger_properties);
   m_collection_sp->AppendProperty(
       ConstString("target"),
@@ -1603,10 +1606,6 @@ void Debugger::JoinIOHandlerThread() {
   }
 }
 
-Target *Debugger::GetDummyTarget() {
-  return m_target_list.GetDummyTarget(*this).get();
-}
-
 Target *Debugger::GetSelectedOrDummyTarget(bool prefer_dummy) {
   Target *target = nullptr;
   if (!prefer_dummy) {