[PATCH] MdeModulePkg SmiHandlerProfile: Fix no PDB case handling incorrectly

[Star Zeng <star.zeng@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=569

The PdbStringOffset should be set to 0 for no PDB case,
then SmiHandlerProfileInfo can use it to know whether
there is PCD info or not.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
---
 .../Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c  | 10 ++++++----
 MdeModulePkg/Core/PiSmmCore/SmiHandlerProfile.c                |  8 ++++++--
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c b/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c
index 2419cd2959a9..338671374c72 100644
--- a/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c
+++ b/MdeModulePkg/Application/SmiHandlerProfileInfo/SmiHandlerProfileInfo.c
@@ -266,8 +266,8 @@ GetDriverNameString (
   //
   // Method 1: Get the name string from image PDB
   //
-  if (ImageStruct->Header.Length > sizeof (SMM_CORE_IMAGE_DATABASE_STRUCTURE)) {
-    GetShortPdbFileName ((CHAR8 *) (ImageStruct + 1), mNameString);
+  if (ImageStruct->PdbStringOffset != 0) {
+    GetShortPdbFileName ((CHAR8 *) ((UINTN) ImageStruct + ImageStruct->PdbStringOffset), mNameString);
     return mNameString;
   }
 
@@ -355,8 +355,10 @@ DumpSmmLoadedImage(
       Print(L" FvFile=\"%g\"", &ImageStruct->FileGuid);
       Print(L" RefId=\"0x%x\"", ImageStruct->ImageRef);
       Print(L">\n");
-      PdbString = (CHAR8 *)((UINTN)ImageStruct + ImageStruct->PdbStringOffset);
-      Print(L"    <Pdb>%a</Pdb>\n", PdbString);
+      if (ImageStruct->PdbStringOffset != 0) {
+        PdbString = (CHAR8 *)((UINTN)ImageStruct + ImageStruct->PdbStringOffset);
+        Print(L"    <Pdb>%a</Pdb>\n", PdbString);
+      }
       Print(L"  </Image>\n");
     }
 
diff --git a/MdeModulePkg/Core/PiSmmCore/SmiHandlerProfile.c b/MdeModulePkg/Core/PiSmmCore/SmiHandlerProfile.c
index 63dcf6e3a1e7..49eba945fd9a 100644
--- a/MdeModulePkg/Core/PiSmmCore/SmiHandlerProfile.c
+++ b/MdeModulePkg/Core/PiSmmCore/SmiHandlerProfile.c
@@ -651,8 +651,12 @@ GetSmmImageDatabaseData (
     ImageStruct->EntryPoint = mImageStruct[Index].EntryPoint;
     ImageStruct->ImageBase = mImageStruct[Index].ImageBase;
     ImageStruct->ImageSize = mImageStruct[Index].ImageSize;
-    ImageStruct->PdbStringOffset = sizeof(SMM_CORE_IMAGE_DATABASE_STRUCTURE);
-    CopyMem ((VOID *)((UINTN)ImageStruct + ImageStruct->PdbStringOffset), mImageStruct[Index].PdbString, mImageStruct[Index].PdbStringSize);
+    if (mImageStruct[Index].PdbStringSize != 0) {
+      ImageStruct->PdbStringOffset = sizeof(SMM_CORE_IMAGE_DATABASE_STRUCTURE);
+      CopyMem ((VOID *)((UINTN)ImageStruct + ImageStruct->PdbStringOffset), mImageStruct[Index].PdbString, mImageStruct[Index].PdbStringSize);
+    } else {
+      ImageStruct->PdbStringOffset = 0;
+    }
     ImageStruct = (SMM_CORE_IMAGE_DATABASE_STRUCTURE *)((UINTN)ImageStruct + ImageStruct->Header.Length);
     Size += sizeof(SMM_CORE_IMAGE_DATABASE_STRUCTURE) + mImageStruct[Index].PdbStringSize;
   }
-- 
2.7.0.windows.1