unit tests: fix queue registry test

In the queue registry test, start_sem is given twice to let both tasks
start the test. Each task takes start_sem, does some work, gives done_sem,
and goes on to wait for start_sem again.
It may happen that one task can grab start_sem, add queues to the
registry, give done_sem, then grab start_sem again, delete the queues
from the registry, and give done_sem again. At this point, main test
task takes done_sem twice and proceeds to verify that queues have been
added to the registry. But in fact, the first task has already deleted
its queues from the registry, and the second one might not have added
the queues yet. This causes test to fail.

This changes the test to use separate start semaphores for each task,
to avoid the race condition.

components/freertos/test/test_freertos_debug_functions.c

@@ -18,7 +18,7 @@
 #define NO_OF_QUEUES_TOTAL    (NO_OF_QUEUES_PER_CORE * portNUM_PROCESSORS)
 #define QUEUE_NAME_MAX_LENGTH    10
 
-static SemaphoreHandle_t start_sem = NULL;
+static SemaphoreHandle_t start_sem[portNUM_PROCESSORS];
 static SemaphoreHandle_t done_sem = NULL;
 static char *names[NO_OF_QUEUES_TOTAL];
 static QueueHandle_t handles[NO_OF_QUEUES_TOTAL];
@@ -34,7 +34,7 @@ void test_queue_registry_task(void *arg)
         sprintf(names[i + offset], "Queue%d%d", core, i);
     }
 
-    xSemaphoreTake(start_sem, portMAX_DELAY);   //Wait for start vQueueAddToRegistry()
+    xSemaphoreTake(start_sem[core], portMAX_DELAY);   //Wait for start vQueueAddToRegistry()
     for(int i = 0; i < NO_OF_QUEUES_PER_CORE; i++){
         vQueueAddToRegistry(handles[i + offset] , names[i + offset]);   //Register queues to queue registry
     }
@@ -42,7 +42,7 @@ void test_queue_registry_task(void *arg)
 
     vTaskDelay(1);
 
-    xSemaphoreTake(start_sem, portMAX_DELAY);   //Wait to start vQueueUnregisterQueue()
+    xSemaphoreTake(start_sem[core], portMAX_DELAY);   //Wait to start vQueueUnregisterQueue()
     for(int i = 0; i < NO_OF_QUEUES_PER_CORE; i++){
         vQueueDelete(handles[i + offset]);  //Internally calls vQueueUnregisterQueue
     }
@@ -53,16 +53,16 @@ void test_queue_registry_task(void *arg)
 
 TEST_CASE("Test FreeRTOS Queue Registry", "[freertos]")
 {
-    //Create synchronization semaphores
-    start_sem = xSemaphoreCreateCounting(portNUM_PROCESSORS, 0);
+    //Create synchronization semaphores and tasks to test queue registry
     done_sem = xSemaphoreCreateCounting(portNUM_PROCESSORS, 0);
-    for(int i = 0; i < portNUM_PROCESSORS; i++){    //Create tasks to test queue registry
+    for(int i = 0; i < portNUM_PROCESSORS; i++){
+        start_sem[i] = xSemaphoreCreateBinary();
         xTaskCreatePinnedToCore(test_queue_registry_task, "testing task", 4096, NULL, UNITY_FREERTOS_PRIORITY+1, NULL, i);
     }
 
     portDISABLE_INTERRUPTS();
     for(int i = 0; i < portNUM_PROCESSORS; i++){
-        xSemaphoreGive(start_sem);  //Trigger start
+        xSemaphoreGive(start_sem[i]);  //Trigger start
     }
     portENABLE_INTERRUPTS();
     for(int i = 0; i < portNUM_PROCESSORS; i++){
@@ -75,7 +75,7 @@ TEST_CASE("Test FreeRTOS Queue Registry", "[freertos]")
 
     portDISABLE_INTERRUPTS();
     for(int i = 0; i < portNUM_PROCESSORS; i++){
-        xSemaphoreGive(start_sem);  //Trigger start
+        xSemaphoreGive(start_sem[i]);  //Trigger start
     }
     portENABLE_INTERRUPTS();
     for(int i = 0; i < portNUM_PROCESSORS; i++){
@@ -92,8 +92,10 @@ TEST_CASE("Test FreeRTOS Queue Registry", "[freertos]")
         free(names[i]);
         names[i] = NULL;
     }
-    vSemaphoreDelete(start_sem);
-    start_sem = NULL;
+    for(int i = 0; i < portNUM_PROCESSORS; i++){
+        vSemaphoreDelete(start_sem[i]);
+        start_sem[i] = NULL;
+    }
     vSemaphoreDelete(done_sem);
     done_sem = NULL;
 }