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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
*/
#include "FreeRTOS.h"
#include "queue.h"
#include "tasksStubs.h"
#include "queue_datastructure.h"
#include "cbmc.h"
QueueHandle_t xMutex;
void vTaskInternalSetTimeOutState( TimeOut_t * const pxTimeOut )
{
/* QueueSemaphoreTake might be blocked to wait for
* another process to release a token to the semaphore.
* This is currently not in the CBMC model. Anyhow,
* vTaskInternalSetTimeOutState is set a timeout for
* QueueSemaphoreTake operation. We use this to model a successful
* release during wait time. */
UBaseType_t bound;
__CPROVER_assume( ( bound >= 0 && xMutex->uxLength >= bound ) );
xMutex->uxMessagesWaiting = bound;
}
BaseType_t xTaskGetSchedulerState( void )
{
BaseType_t ret;
__CPROVER_assume( ret != taskSCHEDULER_SUSPENDED );
return ret;
}
void harness()
{
uint8_t ucQueueType;
xMutex = xQueueCreateMutex( ucQueueType );
TickType_t xTicksToWait;
/* Init task stub to make sure that the QueueSemaphoreTake_BOUND - 1
* loop iteration simulates a time out */
vInitTaskCheckForTimeOut( 0, QueueSemaphoreTake_BOUND - 1 );
if( xMutex )
{
xMutex->cTxLock = PRV_UNLOCK_UNWINDING_BOUND - 1;
xMutex->cRxLock = PRV_UNLOCK_UNWINDING_BOUND - 1;
xMutex->uxMessagesWaiting = nondet_UBaseType_t();
xQueueTakeMutexRecursive( xMutex, xTicksToWait );
}
}
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