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/*
* FreeRTOS V202111.00
* Copyright (C) 2020 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://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/*
* FreeRTOS memory safety proofs with CBMC.
*/
#include "cbmc.h"
/*
* We allocate an unconstrained TCB or return NULL if it fails
*/
TaskHandle_t xUnconstrainedTCB( void )
{
TCB_t * pxTCB = pvPortMalloc( sizeof( TCB_t ) );
if( pxTCB == NULL )
{
return NULL;
}
return pxTCB;
}
StaticTask_t * pxIdleTaskTCB;
StaticTask_t * pxTimerTaskTCB;
StackType_t * pxIdleTaskStack;
StackType_t * pxTimerTaskStack;
/*
* `pxCurrentTCB` allocation is allowed to fail. The global variables above
* this comment are used in the stubbed functions `vApplicationGetIdleTaskMemory`
* and `vApplicationGetTimerTaskMemory` (at the end of this file) and buffer allocation
* must be successful for the proof to have no errors
*/
BaseType_t xPrepareTasks( void )
{
__CPROVER_assert_zero_allocation();
prvInitialiseTaskLists();
pxCurrentTCB = xUnconstrainedTCB();
pxIdleTaskTCB = pvPortMalloc( sizeof( StaticTask_t ) );
if( pxIdleTaskTCB == NULL )
{
return pdFAIL;
}
pxIdleTaskStack = pvPortMalloc( sizeof( StackType_t ) * configMINIMAL_STACK_SIZE );
if( pxIdleTaskStack == NULL )
{
return pdFAIL;
}
pxTimerTaskTCB = pvPortMalloc( sizeof( StaticTask_t ) );
if( pxTimerTaskTCB == NULL )
{
return pdFAIL;
}
pxTimerTaskStack = pvPortMalloc( sizeof( StackType_t ) * configTIMER_TASK_STACK_DEPTH );
if( pxTimerTaskStack == NULL )
{
return pdFAIL;
}
return pdPASS;
}
/*
* The buffers used here have been successfully allocated before (global variables)
*/
void vApplicationGetIdleTaskMemory( StaticTask_t ** ppxIdleTaskTCBBuffer,
StackType_t ** ppxIdleTaskStackBuffer,
uint32_t * pulIdleTaskStackSize )
{
*ppxIdleTaskTCBBuffer = pxIdleTaskTCB;
*ppxIdleTaskStackBuffer = pxIdleTaskStack;
*pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
}
/*
* The buffers used here have been successfully allocated before (global variables)
*/
void vApplicationGetTimerTaskMemory( StaticTask_t ** ppxTimerTaskTCBBuffer,
StackType_t ** ppxTimerTaskStackBuffer,
uint32_t * pulTimerTaskStackSize )
{
*ppxTimerTaskTCBBuffer = pxTimerTaskTCB;
*ppxTimerTaskStackBuffer = pxTimerTaskStack;
*pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
}
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