Index: tools/lldb-mi/MICmnResources.h
===================================================================
--- tools/lldb-mi/MICmnResources.h
+++ tools/lldb-mi/MICmnResources.h
@@ -77,6 +77,7 @@
   IDE_MI_APP_ARG_APP_LOG_DIR,
   IDE_MI_APP_ARG_EXAMPLE,
   IDE_MI_APP_ARG_EXECUTABLE,
+  IDE_MI_APP_ARG_SYNCHRONOUS,
 
   IDS_STDIN_ERR_INVALID_PROMPT,
   IDS_STDIN_ERR_THREAD_CREATION_FAILED,
Index: tools/lldb-mi/MICmnResources.cpp
===================================================================
--- tools/lldb-mi/MICmnResources.cpp
+++ tools/lldb-mi/MICmnResources.cpp
@@ -110,6 +110,8 @@
         {IDE_MI_APP_ARG_EXECUTABLE, "executable (NOT IMPLEMENTED)\n\tThe file "
                                     "path to the executable i.e. '\"C:\\My "
                                     "Dev\\foo.exe\"'."},
+        {IDE_MI_APP_ARG_SYNCHRONOUS, "--synchronous\n\tBlock until each command "
+                                     "has finished executing.\n\tUsed for testing only."},
         {IDS_STDIN_ERR_INVALID_PROMPT,
          "Stdin. Invalid prompt description '%s'"},
         {IDS_STDIN_ERR_THREAD_CREATION_FAILED,
Index: tools/lldb-mi/MIDriver.cpp
===================================================================
--- tools/lldb-mi/MIDriver.cpp
+++ tools/lldb-mi/MIDriver.cpp
@@ -382,6 +382,7 @@
 //          that are only handled by *this driver:
 //              --executable <file>
 //              --source <file> or -s <file>
+//              --synchronous
 //          The application's options --interpreter and --executable in code act
 //          very similar.
 //          The --executable is necessary to differentiate whether the MI Driver
@@ -397,6 +398,7 @@
 //          argument for a debug session. Using --interpreter on the command
 //          line does not
 //          issue additional commands to initialise a debug session.
+//          Option --synchronous disables an asynchronous mode in the lldb-mi driver.
 // Type:    Overridden.
 // Args:    argc        - (R)   An integer that contains the count of arguments
 // that follow in
@@ -469,6 +471,8 @@
                                                     // command line
       {                                             // See fn description.
         bHaveExecutableLongOption = true;
+      } else if (strArg.compare("--synchronous") == 0) {
+        CMICmnLLDBDebugSessionInfo::Instance().GetDebugger().SetAsync(false);
       }
     }
   }
Index: tools/lldb-mi/MIDriverMgr.cpp
===================================================================
--- tools/lldb-mi/MIDriverMgr.cpp
+++ tools/lldb-mi/MIDriverMgr.cpp
@@ -640,6 +640,7 @@
       MIRSRC(IDE_MI_APP_ARG_VERSION), MIRSRC(IDE_MI_APP_ARG_VERSION_LONG),
       MIRSRC(IDE_MI_APP_ARG_INTERPRETER), MIRSRC(IDE_MI_APP_ARG_SOURCE),
       MIRSRC(IDE_MI_APP_ARG_EXECUTEABLE),
+      MIRSRC(IDE_MI_APP_ARG_SYNCHRONOUS),
       CMIUtilString::Format(
           MIRSRC(IDE_MI_APP_ARG_APP_LOG),
           CMICmnLogMediumFile::Instance().GetFileName().c_str()),