[PATCH] MdeModulePkg/Variable: add debug logs in VariableServiceSetVariable

[Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>]

Print debug messages if size of the VariableName plus DataSize exceeds
Max(Auth|Voltaile)VariableSize bytes. The messages will be useful if any
platform specific value of Max(Auth|Voltaile)VariableSize PCDs have to
be changed.

Cc: Star Zeng <star.zeng@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
---
 MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
index 8e8db71bd201..db54fa4412c0 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
@@ -3234,14 +3234,20 @@ VariableServiceSetVariable (
     //
     if ((Attributes & VARIABLE_ATTRIBUTE_AT_AW) != 0) {
       if (StrSize (VariableName) + PayloadSize > mVariableModuleGlobal->MaxAuthVariableSize - GetVariableHeaderSize ()) {
+        DEBUG ((DEBUG_ERROR, "%a: Size of (%s) variable + DataSize exceeds MaxAuthVariableSize.\n",
+          __FUNCTION__, VariableName));
         return EFI_INVALID_PARAMETER;
       }
     } else if ((Attributes & EFI_VARIABLE_NON_VOLATILE) != 0) {
       if (StrSize (VariableName) + PayloadSize > mVariableModuleGlobal->MaxVariableSize - GetVariableHeaderSize ()) {
+        DEBUG ((DEBUG_ERROR, "%a: Size of (%s) variable + DataSize exceeds MaxVariableSize.\n",
+          __FUNCTION__, VariableName));
         return EFI_INVALID_PARAMETER;
       }
     } else {
       if (StrSize (VariableName) + PayloadSize > mVariableModuleGlobal->MaxVolatileVariableSize - GetVariableHeaderSize ()) {
+        DEBUG ((DEBUG_ERROR, "%a: Size of (%s) variable + DataSize exceeds MaxVolatileVariableSize.\n",
+          __FUNCTION__, VariableName));
         return EFI_INVALID_PARAMETER;
       }
     }
-- 
2.17.1