[PATCH 2/2] MdePkg/Include: Define new DEBUG_FILE to specify path.

["Guomin Jiang" <guomin.jiang@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3840

Use DEBUG_FILE to control ASSERT path

Motivation and Goal:
1. The path will occupy many size in DEBUG build when file path is long
2. We hope can reduce the size but not impact the debug capability
3. If only use filename, we can search the filename to locate file. It
   can save many size meanwhile.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Guomin Jiang <guomin.jiang@intel.com>
---
 MdePkg/Include/Library/DebugLib.h | 39 ++++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 11 deletions(-)

diff --git a/MdePkg/Include/Library/DebugLib.h b/MdePkg/Include/Library/DebugLib.h
index 8d3d08638d73..5469c6308422 100644
--- a/MdePkg/Include/Library/DebugLib.h
+++ b/MdePkg/Include/Library/DebugLib.h
@@ -8,7 +8,7 @@
   of size reduction when compiler optimization is disabled. If MDEPKG_NDEBUG is
   defined, then debug and assert related macros wrapped by it are the NULL implementations.
 
-Copyright (c) 2006 - 2020, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -85,6 +85,31 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #define DEBUG_LINE_NUMBER  __LINE__
 #endif
 
+//
+// Source file.
+// Default is use the to compiler provided __FILE__ macro value. The __FILE__
+// mapping can be overriden by predefining DEBUG_FILE
+//
+// Defining DEBUG_FILE to a fixed value is useful when comparing builds
+// across machine or configuration with different slash or path
+// file.
+//
+// Another benefit is we can customize the ASSERT path without depending on
+// compiler ability
+//
+// It's for all no matter VS, GCC, CLANG
+//
+#ifdef DEBUG_FILE
+#else
+#define DEBUG_FILE  __FILE__
+#endif
+
+// Blow override for keep clang behavior
+#if defined (__clang__) && defined (__FILE_NAME__)
+#undef DEBUG_FILE
+#define DEBUG_FILE __FILE_NAME__
+#endif
+
 /**
   Macro that converts a Boolean expression to a Null-terminated ASCII string.
 
@@ -337,17 +362,9 @@ UnitTestDebugAssert (
   IN CONST CHAR8  *Description
   );
 
-  #if defined (__clang__) && defined (__FILE_NAME__)
-#define _ASSERT(Expression)  UnitTestDebugAssert (__FILE_NAME__, DEBUG_LINE_NUMBER, DEBUG_EXPRESSION_STRING (Expression))
-  #else
-#define _ASSERT(Expression)  UnitTestDebugAssert (__FILE__, DEBUG_LINE_NUMBER, DEBUG_EXPRESSION_STRING (Expression))
-  #endif
+#define _ASSERT(Expression)  UnitTestDebugAssert (DEBUG_FILE, DEBUG_LINE_NUMBER, DEBUG_EXPRESSION_STRING (Expression))
 #else
-  #if defined (__clang__) && defined (__FILE_NAME__)
-#define _ASSERT(Expression)  DebugAssert (__FILE_NAME__, DEBUG_LINE_NUMBER, DEBUG_EXPRESSION_STRING (Expression))
-  #else
-#define _ASSERT(Expression)  DebugAssert (__FILE__, DEBUG_LINE_NUMBER, DEBUG_EXPRESSION_STRING (Expression))
-  #endif
+#define _ASSERT(Expression)  DebugAssert (DEBUG_FILE, DEBUG_LINE_NUMBER, DEBUG_EXPRESSION_STRING (Expression))
 #endif
 
 /**
-- 
2.35.1.windows.2