2 * FreeRTOS memory safety proofs with CBMC.
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31 #include "queue_init.h"
32 #include "tasksStubs.h"
35 /* prvUnlockQueue is going to decrement this value to 0 in the loop.
36 * We need a bound for the loop. Using 4 has a reasonable performance resulting
37 * in 3 unwinding iterations of the loop. The loop is mostly modifying a
38 * data structure in task.c that is not in the scope of the proof. */
43 /* This code checks for time outs. This value is used to bound the time out
44 * wait period. The stub function xTaskCheckForTimeOut used to model
45 * this wait time will be bounded to this define. */
46 #ifndef QUEUE_RECEIVE_BOUND
47 #define QUEUE_RECEIVE_BOUND 4
50 /* If the item size is not bounded, the proof does not finish in a reasonable
51 * time due to the involved memcpy commands. */
53 #define MAX_ITEM_SIZE 20
58 /* This method is used to model side effects of concurrency.
59 * The initialization of pxTimeOut is not relevant for this harness. */
60 void vTaskInternalSetTimeOutState( TimeOut_t * const pxTimeOut )
62 __CPROVER_assert( __CPROVER_w_ok( &( pxTimeOut->xOverflowCount ), sizeof( BaseType_t ) ), "pxTimeOut should be a valid pointer and xOverflowCount writable" );
63 __CPROVER_assert( __CPROVER_w_ok( &( pxTimeOut->xTimeOnEntering ), sizeof( TickType_t ) ), "pxTimeOut should be a valid pointer and xTimeOnEntering writable" );
64 xQueue->uxMessagesWaiting = nondet_BaseType_t();
69 vInitTaskCheckForTimeOut( 0, QUEUE_RECEIVE_BOUND - 1 );
71 xQueue = xUnconstrainedQueueBoundedItemSize( MAX_ITEM_SIZE );
74 TickType_t xTicksToWait;
76 if( xState == taskSCHEDULER_SUSPENDED )
83 xQueue->cTxLock = LOCK_BOUND - 1;
84 xQueue->cRxLock = LOCK_BOUND - 1;
86 void * pvBuffer = pvPortMalloc( xQueue->uxItemSize );
90 xQueue->uxItemSize = 0;
93 xQueueReceive( xQueue, pvBuffer, xTicksToWait );