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diff --git a/StdLib/Include/assert.h b/StdLib/Include/assert.h
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+/** @file
+  Provides a definition of the assert macro.
+
+  This header file defines the assert macro and refers to the NDEBUG macro,
+  which is NOT defined in this file.
+
+  Unlike other header files, assert.h is designed to be included multiple
+  times, with potentially different behavior on each inclusion.
+
+  If the NDEBUG macro is defined at the point where assert.h
+  is included, the assert macro is defined so as to not produce code.
+  Otherwise, the assertion is tested and if the assertion is true a
+  diagnostic message of the form
+  "ASSERT <FileName>(<LineNumber>): <Description>\n" is produced.
+  A true assertion will also result in the application being terminated.
+
+  The behavior of the assert macro can be further modified by setting attributes
+  in the PcdDebugPropertyMask PCD entry when building the Application Toolkit.
+  If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of PcdDebugProperyMask is set
+  then CpuBreakpoint() is called. Otherwise, if the
+  DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then
+  CpuDeadLoop() is called.  If neither of these bits are set, then the
+  application will be terminated immediately after the message is printed to
+  the debug output device.
+
+Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+#include  <sys/EfiCdefs.h>
+
+#undef  assert        ///< Remove any existing definition for assert.
+
+extern void
+__assert(const char *func, const char *file, int line, const char *failedexpr);
+
+/** The assert macro puts diagnostic tests into programs; it expands to a
+    void expression.
+
+    When it is executed, if expression (which shall have a scalar type) is
+    false (that is, compares equal to 0), the assert macro writes information
+    about the particular call that failed (including the text of the argument,
+    the name of the source file, the source line number, and the name of the
+    enclosing function - the latter are respectively the values of the
+    preprocessing macros __FILE__ and __LINE__ and of the identifier __func__)
+    on the standard error stream. It then calls the abort function.
+
+  If NDEBUG is not defined, Expression is evaluated.  If Expression evaluates to FALSE, then
+  __assert is called passing in the source filename, source function, source line number,
+  and the Expression.
+
+  @param  Expression  Boolean expression.
+
+@{
+**/
+#ifdef  NDEBUG
+#define assert(Expression)  /* ignored */
+
+#else
+#define assert(Expression)   ((Expression) ? (void)0 :\
+                              __assert(__func__, __FILE__, __LINE__, #Expression) )
+#endif
+/// @}
+/* END of file assert.h */