From 6bad7d2055bb15750391ffa7454cba33ad1b0d2b Mon Sep 17 00:00:00 2001
From: Gaurav Aggarwal <aggarg@amazon.com>
Date: Sat, 27 Jul 2019 23:03:23 +0000
Subject: [PATCH] Add the default definition of configPRECONDITION to
 FreeRTOS.h.

This is needed for CBMC proofs.
---
 FreeRTOS/Source/include/FreeRTOS.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/FreeRTOS/Source/include/FreeRTOS.h b/FreeRTOS/Source/include/FreeRTOS.h
index 45c778a03..14f98d0b0 100644
--- a/FreeRTOS/Source/include/FreeRTOS.h
+++ b/FreeRTOS/Source/include/FreeRTOS.h
@@ -241,6 +241,19 @@ extern "C" {
 	#define configASSERT_DEFINED 1
 #endif
 
+/* configPRECONDITION should resolve to configASSERT. The CBMC proofs need a way
+to track assumptions and assertions.
+- A configPRECONDITION statement should express an implicit invariant or
+assumption made.
+- A configASSERT statement should express an invariant that must hold explicit
+before calling the code. */
+#ifndef configPRECONDITION
+	#define configPRECONDITION( X ) configASSERT(X)
+	#define configPRECONDITION_DEFINED 0
+#else
+	#define configPRECONDITION_DEFINED 1
+#endif
+
 #ifndef portMEMORY_BARRIER
 	#define portMEMORY_BARRIER()
 #endif