[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS/Test/CBMC/proofs/Queue/QueueReceive/Makefile.json

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+#
+# FreeRTOS memory safety proofs with CBMC.
+# Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation
+# files (the "Software"), to deal in the Software without
+# restriction, including without limitation the rights to use, copy,
+# modify, merge, publish, distribute, sublicense, and/or sell copies
+# of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+# http://aws.amazon.com/freertos
+# http://www.FreeRTOS.org
+#
+
+{
+  "ENTRY": "QueueReceive",
+  "LOCK_BOUND": 2,
+  "QUEUE_RECEIVE_BOUND": 3,
+  "CBMCFLAGS": [
+    "--unwind 1",
+    "--signed-overflow-check",
+    "--unsigned-overflow-check",
+    "--unwindset xQueueReceive.0:{QUEUE_RECEIVE_BOUND},prvUnlockQueue.0:{LOCK_BOUND},prvUnlockQueue.1:{LOCK_BOUND}",
+    "--nondet-static"
+  ],
+  "OBJS": [
+    "$(ENTRY)_harness.goto",
+    "$(FREERTOS)/Source/queue.goto",
+    "$(FREERTOS)/Source/list.goto",
+    "$(FREERTOS)/Test/CBMC/proofs/CBMCStubLibrary/tasksStubs.goto"
+  ],
+  "DEF": [
+    "configUSE_TRACE_FACILITY=0",
+    "configGENERATE_RUN_TIME_STATS=0",
+    "INCLUDE_xTaskGetSchedulerState=1",
+    "QUEUE_RECEIVE_BOUND={QUEUE_RECEIVE_BOUND}",
+    "LOCK_BOUND={LOCK_BOUND}"
+  ],
+  "INC": [
+    "."
+  ],
+  "GENERATE_HEADER": [
+    "queue_datastructure.h"
+  ]
+}
+

kernel/FreeRTOS/Test/CBMC/proofs/Queue/QueueReceive/QueueReceive_harness.c

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+/*
+ * FreeRTOS memory safety proofs with CBMC.
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * https://aws.amazon.com/freertos
+ * https://www.FreeRTOS.org
+ */
+
+#include "FreeRTOS.h"
+#include "queue.h"
+#include "queue_init.h"
+#include "tasksStubs.h"
+#include "cbmc.h"
+
+/* prvUnlockQueue is going to decrement this value to 0 in the loop.
+* We need a bound for the loop. Using 4 has a reasonable performance resulting
+* in 3 unwinding iterations of the loop. The loop is mostly modifying a
+* data structure in task.c that is not in the scope of the proof. */
+#ifndef LOCK_BOUND
+    #define LOCK_BOUND    4
+#endif
+
+/* This code checks for time outs. This value is used to bound the time out
+ * wait period. The stub function xTaskCheckForTimeOut used to model
+ * this wait time will be bounded to this define. */
+#ifndef QUEUE_RECEIVE_BOUND
+    #define QUEUE_RECEIVE_BOUND    4
+#endif
+
+/* If the item size is not bounded, the proof does not finish in a reasonable
+ * time due to the involved memcpy commands. */
+#ifndef MAX_ITEM_SIZE
+    #define MAX_ITEM_SIZE    20
+#endif
+
+QueueHandle_t xQueue;
+
+/* This method is used to model side effects of concurrency.
+ * The initialization of pxTimeOut is not relevant for this harness. */
+void vTaskInternalSetTimeOutState( TimeOut_t * const pxTimeOut )
+{
+    __CPROVER_assert( __CPROVER_w_ok( &( pxTimeOut->xOverflowCount ), sizeof( BaseType_t ) ), "pxTimeOut should be a valid pointer and xOverflowCount writable" );
+    __CPROVER_assert( __CPROVER_w_ok( &( pxTimeOut->xTimeOnEntering ), sizeof( TickType_t ) ), "pxTimeOut should be a valid pointer and xTimeOnEntering writable" );
+    xQueue->uxMessagesWaiting = nondet_BaseType_t();
+}
+
+void harness()
+{
+    vInitTaskCheckForTimeOut( 0, QUEUE_RECEIVE_BOUND - 1 );
+
+    xQueue = xUnconstrainedQueueBoundedItemSize( MAX_ITEM_SIZE );
+
+
+    TickType_t xTicksToWait;
+
+    if( xState == taskSCHEDULER_SUSPENDED )
+    {
+        xTicksToWait = 0;
+    }
+
+    if( xQueue )
+    {
+        xQueue->cTxLock = LOCK_BOUND - 1;
+        xQueue->cRxLock = LOCK_BOUND - 1;
+
+        void * pvBuffer = pvPortMalloc( xQueue->uxItemSize );
+
+        if( !pvBuffer )
+        {
+            xQueue->uxItemSize = 0;
+        }
+
+        xQueueReceive( xQueue, pvBuffer, xTicksToWait );
+    }
+}

kernel/FreeRTOS/Test/CBMC/proofs/Queue/QueueReceive/README.md

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+Assuming the bound described in the harness, this harness proves memory safety
+for the QueueReceive function abstracting away
+the task pool and concurrency functions.
+
+This proof is a work-in-progress.  Proof assumptions are described in
+the harness.  The proof also assumes the following functions are
+memory safe and have no side effects relevant to the memory safety of
+this function:
+
+* vPortEnterCritical
+* vPortExitCritical
+* vPortGenerateSimulatedInterrupt
+* vTaskMissedYield
+* vTaskPlaceOnEventList
+* vTaskSuspendAll
+* xTaskRemoveFromEventList
+* xTaskResumeAll

kernel/FreeRTOS/Test/CBMC/proofs/Queue/QueueReceive/cbmc-viewer.json

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+{ "expected-missing-functions":
+  [
+    "vApplicationTickHook",
+
+    "pxPortInitialiseStack",
+    "vPortCloseRunningThread",
+    "vPortDeleteThread",
+    "vPortEnterCritical",
+    "vPortExitCritical",
+    "vPortGenerateSimulatedInterrupt",
+    "xPortStartScheduler",
+
+    "pvTaskIncrementMutexHeldCount",
+    "uxTaskGetTaskNumber",
+    "vTaskInternalSetTimeOutState",
+    "vTaskMissedYield",
+    "vTaskPlaceOnEventList",
+    "vTaskPriorityDisinheritAfterTimeout",
+    "vTaskSuspendAll",
+    "xTaskGetCurrentTaskHandle",
+    "xTaskPriorityDisinherit",
+    "xTaskPriorityInherit",
+    "xTaskRemoveFromEventList",
+    "xTaskResumeAll"
+  ],
+  "proof-name": "QueueReceive",
+  "proof-root": "Test/CBMC/proofs"
+}