1 files changed, 88 insertions, 0 deletions
diff --git a/FreeRTOS/Test/CBMC/proofs/Queue/QueueSemaphoreTake/QueueSemaphoreTake_harness.c b/FreeRTOS/Test/CBMC/proofs/Queue/QueueSemaphoreTake/QueueSemaphoreTake_harness.c
new file mode 100644
index 000000000..21fdbf80e
--- /dev/null
+++ b/FreeRTOS/Test/CBMC/proofs/Queue/QueueSemaphoreTake/QueueSemaphoreTake_harness.c
@@ -0,0 +1,88 @@
+/*
+ * 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 "queue_init.h"
+#include "tasksStubs.h"
+#include "cbmc.h"
+
+BaseType_t state;
+QueueHandle_t xQueue;
+BaseType_t counter;
+
+BaseType_t xTaskGetSchedulerState(void)
+{
+	return state;
+}
+
+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 && xQueue->uxLength >= bound));
+	xQueue->uxMessagesWaiting = bound;
+}
+
+void harness()
+{
+	/* Init task stub to make sure that the third loop iteration
+	simulates a time out */
+	vInitTaskCheckForTimeOut(0, 3);
+
+	xQueue = xUnconstrainedMutex();
+	TickType_t xTicksToWait;
+
+	if(state == taskSCHEDULER_SUSPENDED){
+		xTicksToWait = 0;
+	}
+	if (xQueue) {
+		/* Bounding the loop in prvUnlockQueue to
+		   PRV_UNLOCK_QUEUE_BOUND. As the loop is not relevant
+		   in this proof the value might be set to any
+		   positive 8-bit integer value. We subtract one,
+		   because the bound must be one greater than the
+		   amount of loop iterations. */
+		__CPROVER_assert(PRV_UNLOCK_QUEUE_BOUND > 0, "Make sure, a valid macro value is chosen.");
+		xQueue->cTxLock = PRV_UNLOCK_QUEUE_BOUND - 1;
+		xQueue->cRxLock = PRV_UNLOCK_QUEUE_BOUND - 1;
+		((&(xQueue->xTasksWaitingToReceive))->xListEnd).pxNext->xItemValue = nondet_ticktype();
+
+		/* This assumptions is required to prevent an overflow in l. 2057 of queue.c
+		   in the prvGetDisinheritPriorityAfterTimeout() function. */
+		__CPROVER_assume( (
+		  ( UBaseType_t ) listGET_ITEM_VALUE_OF_HEAD_ENTRY( &( xQueue->xTasksWaitingToReceive ) )
+		   <= ( ( UBaseType_t ) configMAX_PRIORITIES)));
+		xQueueSemaphoreTake(xQueue, xTicksToWait);
+	}
+}