Refine code to make code run more safely.

[mirror_edk2.git] / MdeModulePkg / Universal / StatusCodeHandler / RuntimeDxe / SerialStatusCodeWorker.c

diff --git a/MdeModulePkg/Universal/StatusCodeHandler/RuntimeDxe/SerialStatusCodeWorker.c b/MdeModulePkg/Universal/StatusCodeHandler/RuntimeDxe/SerialStatusCodeWorker.c
index 626772575152e42d60770fc7ce1033652fb96d86..4a5d65d25e21fa8aa2b7adfbb89fa9b32c3e5cbc 100644 (file)
--- a/MdeModulePkg/Universal/StatusCodeHandler/RuntimeDxe/SerialStatusCodeWorker.c
+++ b/MdeModulePkg/Universal/StatusCodeHandler/RuntimeDxe/SerialStatusCodeWorker.c
@@ -90,6 +90,7 @@ SerialStatusCodeReportWorker (
                   Value, \r
                   Instance\r
                   );\r
+    ASSERT (CharCount > 0);\r
    \r
     if (CallerId != NULL) {\r
       CharCount += AsciiSPrint (\r