[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/test/cbmc/proofs/SkipNameField/Makefile.json

@@ -0,0 +1,32 @@
+{
+  "ENTRY": "SkipNameField",
+
+################################################################
+# This is the network buffer size. This can be set to any positive value.
+  "NETWORK_BUFFER_SIZE": 10,
+
+################################################################
+# Loop DNS_SkipNameField.0:
+#   file lib/FreeRTOS-Plus-TCP/source/FreeRTOS_DNS.c line 778
+#   bound should be half network buffer size, since chunk length is at least 2
+  "SKIPLOOP0": "DNS_SkipNameField.0",
+  "SKIPLOOP0_UNWIND": "__eval ({NETWORK_BUFFER_SIZE} + 1) / 2",
+
+################################################################
+
+  "CBMCFLAGS":
+  [
+    "--unwind 1",
+    "--unwindset {SKIPLOOP0}:{SKIPLOOP0_UNWIND}"
+  ],
+
+  "OBJS":
+  [
+    "$(ENTRY)_harness.goto",
+    "$(FREERTOS_PLUS_TCP)/source/FreeRTOS_DNS_Parser.goto"
+  ],
+  "DEF":
+  [
+    "NETWORK_BUFFER_SIZE={NETWORK_BUFFER_SIZE}"
+  ]
+}

kernel/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/test/cbmc/proofs/SkipNameField/SkipNameField_harness.c

@@ -0,0 +1,55 @@
+/* Standard includes. */
+#include <stdint.h>
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+#include "list.h"
+#include "semphr.h"
+
+/* FreeRTOS+TCP includes. */
+#include "FreeRTOS_IP.h"
+#include "FreeRTOS_Sockets.h"
+#include "FreeRTOS_IP_Private.h"
+#include "FreeRTOS_UDP_IP.h"
+#include "FreeRTOS_DNS.h"
+#include "NetworkBufferManagement.h"
+#include "NetworkInterface.h"
+#include "IPTraceMacroDefaults.h"
+#include "FreeRTOS_DNS_Parser.h"
+
+#include "cbmc.h"
+
+/****************************************************************
+* Signature of function under test
+****************************************************************/
+
+size_t DNS_SkipNameField( const uint8_t * pucByte,
+                          size_t uxLength );
+
+/****************************************************************
+* Proof of DNS_SkipNameField function contract
+****************************************************************/
+
+void harness()
+{
+    __CPROVER_assert( NETWORK_BUFFER_SIZE < CBMC_MAX_OBJECT_SIZE,
+                      "NETWORK_BUFFER_SIZE < CBMC_MAX_OBJECT_SIZE" );
+
+    size_t uxLength;
+    uint8_t * pucByte = malloc( uxLength );
+
+    /* Preconditions */
+
+    __CPROVER_assume( uxLength < CBMC_MAX_OBJECT_SIZE );
+    __CPROVER_assume( uxLength <= NETWORK_BUFFER_SIZE );
+    __CPROVER_assume( pucByte != NULL );
+
+    size_t index = DNS_SkipNameField( pucByte, uxLength );
+
+    /* Postconditions */
+
+    __CPROVER_assert( index <= uxLength,
+                      "DNS_SkipNameField: index <= uxLength" );
+}