[lldb-mi] Fix evaluation for children of created variable object.

Move code in CMICmdCmdVarListChildren::Execute() up so that the child
object will always be added when the MI command -var-list-children is
entered (instead of only when the print-value was all or simple).  This
patch fixes evaluation of expressions like varobj.member for a created
varobj with children.

Reviewed by: abidh
Subscribers: lldb-commits
Differential Revision: http://reviews.llvm.org/D11659

llvm-svn: 243782

lldb/test/tools/lldb-mi/variable/TestMiVar.py

@@ -256,6 +256,17 @@ def test_lldbmi_var_list_children(self):
         self.runCmd("-var-create var_pcomplx * pcomplx")
         self.expect("\^done,name=\"var_pcomplx\",numchild=\"2\",value=\"\{\.\.\.\}\",type=\"pcomplex_type\",thread-id=\"1\",has_more=\"0\"")
 
+        # Test that -var-evaluate-expression can evaluate the children of created varobj
+        self.runCmd("-var-list-children var_complx")
+        self.runCmd("-var-evaluate-expression var_complx.i")
+        self.expect("\^done,value=\"3\"")
+        self.runCmd("-var-list-children var_complx_array")
+        self.runCmd("-var-evaluate-expression var_complx_array.[0]")
+        self.expect("\^done,value=\"\{...\}\"")
+        self.runCmd("-var-list-children var_pcomplx")
+        self.runCmd("-var-evaluate-expression var_pcomplx.complex_type")
+        self.expect("\^done,value=\"\{...\}\"")
+
         # Test that -var-list-children lists empty children if range is empty
         # (and that print-values is optional)
         self.runCmd("-var-list-children var_complx 0 0")

lldb/tools/lldb-mi/MICmdCmdVar.cpp

@@ -1019,6 +1019,9 @@ CMICmdCmdVarListChildren::Execute(void)
         const MIuint nChildren = member.GetNumChildren();
         const CMIUtilString strThreadId(CMIUtilString::Format("%u", member.GetThread().GetIndexID()));
 
+        // Varobj gets added to CMICmnLLDBDebugSessionInfoVarObj static container of varObjs
+        CMICmnLLDBDebugSessionInfoVarObj var(strExp, name, member, rVarObjName);
+
         // MI print "child={name=\"%s\",exp=\"%s\",numchild=\"%d\",value=\"%s\",type=\"%s\",thread-id=\"%u\",has_more=\"%u\"}"
         const CMICmnMIValueConst miValueConst(name);
         const CMICmnMIValueResult miValueResult("name", miValueConst);
@@ -1040,8 +1043,6 @@ CMICmdCmdVarListChildren::Execute(void)
         if (eVarInfoFormat == CMICmnLLDBDebugSessionInfo::eVariableInfoFormat_AllValues ||
             (eVarInfoFormat == CMICmnLLDBDebugSessionInfo::eVariableInfoFormat_SimpleValues && nChildren == 0))
         {
-            // Varobj gets added to CMICmnLLDBDebugSessionInfoVarObj static container of varObjs
-            CMICmnLLDBDebugSessionInfoVarObj var(strExp, name, member, rVarObjName);
             const CMIUtilString strValue(
             CMICmnLLDBDebugSessionInfoVarObj::GetValueStringFormatted(member, CMICmnLLDBDebugSessionInfoVarObj::eVarFormat_Natural));
             const CMICmnMIValueConst miValueConst7(strValue);