Converted the lldb_private::Process over to use the intrusive

shared pointers.

Changed the ExecutionContext over to use shared pointers for
the target, process, thread and frame since these objects can
easily go away at any time and any object that was holding onto
an ExecutionContext was running the risk of using a bad object.

Now that the shared pointers for target, process, thread and
frame are just a single pointer (they all use the instrusive
shared pointers) the execution context is much safer and still
the same size. 

Made the shared pointers in the the ExecutionContext class protected
and made accessors for all of the various ways to get at the pointers,
references, and shared pointers.

llvm-svn: 140298

1 files changed, 29 insertions, 29 deletions

diff --git a/lldb/source/Commands/CommandObjectFrame.cpp b/lldb/source/Commands/CommandObjectFrame.cpp
index 4982bfb..555afc34 100644
--- a/lldb/source/Commands/CommandObjectFrame.cpp
+++ b/lldb/source/Commands/CommandObjectFrame.cpp
@@ -74,9 +74,10 @@ public:
              CommandReturnObject &result)
     {
         ExecutionContext exe_ctx(m_interpreter.GetExecutionContext());
-        if (exe_ctx.frame)
+        StackFrame *frame = exe_ctx.GetFramePtr();
+        if (frame)
         {
-            exe_ctx.frame->DumpUsingSettingsFormat (&result.GetOutputStream());
+            frame->DumpUsingSettingsFormat (&result.GetOutputStream());
             result.SetStatus (eReturnStatusSuccessFinishResult);
         }
         else
@@ -192,14 +193,15 @@ public:
              CommandReturnObject &result)
     {
         ExecutionContext exe_ctx (m_interpreter.GetExecutionContext());
-        if (exe_ctx.thread)
+        Thread *thread = exe_ctx.GetThreadPtr();
+        if (thread)
         {
-            const uint32_t num_frames = exe_ctx.thread->GetStackFrameCount();
+            const uint32_t num_frames = thread->GetStackFrameCount();
             uint32_t frame_idx = UINT32_MAX;
             if (m_options.relative_frame_offset != INT32_MIN)
             {
                 // The one and only argument is a signed relative frame index
-                frame_idx = exe_ctx.thread->GetSelectedFrameIndex ();
+                frame_idx = thread->GetSelectedFrameIndex ();
                 if (frame_idx == UINT32_MAX)
                     frame_idx = 0;
                 
@@ -254,13 +256,13 @@ public:
                 
             if (frame_idx < num_frames)
             {
-                exe_ctx.thread->SetSelectedFrameByIndex (frame_idx);
-                exe_ctx.frame = exe_ctx.thread->GetSelectedFrame ().get();
-
-                if (exe_ctx.frame)
+                thread->SetSelectedFrameByIndex (frame_idx);
+                exe_ctx.SetFrameSP(thread->GetSelectedFrame ());
+                StackFrame *frame = exe_ctx.GetFramePtr();
+                if (frame)
                 {
                     bool already_shown = false;
-                    SymbolContext frame_sc(exe_ctx.frame->GetSymbolContext(eSymbolContextLineEntry));
+                    SymbolContext frame_sc(frame->GetSymbolContext(eSymbolContextLineEntry));
                     if (m_interpreter.GetDebugger().GetUseExternalEditor() && frame_sc.line_entry.file && frame_sc.line_entry.line != 0)
                     {
                         already_shown = Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line);
@@ -270,11 +272,11 @@ public:
                     bool show_source = !already_shown;
                     uint32_t source_lines_before = 3;
                     uint32_t source_lines_after = 3;
-                    if (exe_ctx.frame->GetStatus(result.GetOutputStream(),
-                                                 show_frame_info,
-                                                 show_source,
-                                                 source_lines_before,
-                                                 source_lines_after))
+                    if (frame->GetStatus (result.GetOutputStream(),
+                                          show_frame_info,
+                                          show_source,
+                                          source_lines_before,
+                                          source_lines_after))
                     {
                         result.SetStatus (eReturnStatusSuccessFinishResult);
                         return result.Succeeded();
@@ -369,7 +371,8 @@ public:
     )
     {
         ExecutionContext exe_ctx(m_interpreter.GetExecutionContext());
-        if (exe_ctx.frame == NULL)
+        StackFrame *frame = exe_ctx.GetFramePtr();
+        if (frame == NULL)
         {
             result.AppendError ("you must be stopped in a valid stack frame to view frame variables.");
             result.SetStatus (eReturnStatusFailed);
@@ -383,9 +386,7 @@ public:
         // Be careful about the stack frame, if any summary formatter runs code, it might clear the StackFrameList
         // for the thread.  So hold onto a shared pointer to the frame so it stays alive.
         
-        StackFrameSP frame_sp = exe_ctx.frame->GetSP();
-        
-        VariableList *variable_list = frame_sp->GetVariableList (get_file_globals);
+        VariableList *variable_list = frame->GetVariableList (get_file_globals);
 
         VariableSP var_sp;
         ValueObjectSP valobj_sp;
@@ -458,7 +459,7 @@ public:
                                     var_sp = regex_var_list.GetVariableAtIndex (regex_idx);
                                     if (var_sp)
                                     {
-                                        valobj_sp = frame_sp->GetValueObjectForFrameVariable (var_sp, m_varobj_options.use_dynamic);
+                                        valobj_sp = frame->GetValueObjectForFrameVariable (var_sp, m_varobj_options.use_dynamic);
                                         if (valobj_sp)
                                         {
                                             if (m_option_variable.format != eFormatDefault)
@@ -499,11 +500,11 @@ public:
                         Error error;
                         uint32_t expr_path_options = StackFrame::eExpressionPathOptionCheckPtrVsMember;
                         lldb::VariableSP var_sp;
-                        valobj_sp = frame_sp->GetValueForVariableExpressionPath (name_cstr, 
-                                                                                 m_varobj_options.use_dynamic, 
-                                                                                 expr_path_options,
-                                                                                 var_sp,
-                                                                                 error);
+                        valobj_sp = frame->GetValueForVariableExpressionPath (name_cstr, 
+                                                                              m_varobj_options.use_dynamic, 
+                                                                              expr_path_options,
+                                                                              var_sp,
+                                                                              error);
                         if (valobj_sp)
                         {
                             if (m_option_variable.format != eFormatDefault)
@@ -533,8 +534,7 @@ public:
                                     size = valobj_sp->GetByteSize();
                                 }
                                 uint32_t watch_type = m_option_watchpoint.watch_type;
-                                WatchpointLocation *wp_loc =
-                                    exe_ctx.target->CreateWatchpointLocation(addr, size, watch_type).get();
+                                WatchpointLocation *wp_loc = exe_ctx.GetTargetRef().CreateWatchpointLocation(addr, size, watch_type).get();
                                 if (wp_loc)
                                 {
                                     if (var_sp && var_sp->GetDeclaration().GetFile())
@@ -613,8 +613,8 @@ public:
                             // Use the variable object code to make sure we are
                             // using the same APIs as the the public API will be
                             // using...
-                            valobj_sp = frame_sp->GetValueObjectForFrameVariable (var_sp, 
-                                                                                  m_varobj_options.use_dynamic);
+                            valobj_sp = frame->GetValueObjectForFrameVariable (var_sp, 
+                                                                               m_varobj_options.use_dynamic);
                             if (valobj_sp)
                             {
                                 if (m_option_variable.format != eFormatDefault)