Merge branch 'bugfix/freertos_stack_tcb_alloc_order' into 'master'

freertos: fix allocation order for stack and TCB per portSTACK_GROWTH

See merge request espressif/esp-idf!18042

components/freertos/FreeRTOS-Kernel/portable/port_common.c

@@ -159,9 +159,24 @@ void vApplicationGetIdleTaskMemory(StaticTask_t **ppxIdleTaskTCBBuffer,
 {
     StaticTask_t *pxTCBBufferTemp;
     StackType_t *pxStackBufferTemp;
-    //Allocate TCB and stack buffer in internal memory
-    pxTCBBufferTemp = pvPortMallocTcbMem(sizeof(StaticTask_t));
-    pxStackBufferTemp = pvPortMallocStackMem(configIDLE_TASK_STACK_SIZE);
+
+    /* If the stack grows down then allocate the stack then the TCB so the stack
+     * does not grow into the TCB.  Likewise if the stack grows up then allocate
+     * the TCB then the stack. */
+    #if (portSTACK_GROWTH > 0)
+    {
+        //Allocate TCB and stack buffer in internal memory
+        pxTCBBufferTemp = pvPortMallocTcbMem(sizeof(StaticTask_t));
+        pxStackBufferTemp = pvPortMallocStackMem(configIDLE_TASK_STACK_SIZE);
+    }
+    #else /* portSTACK_GROWTH */
+    {
+        //Allocate TCB and stack buffer in internal memory
+        pxStackBufferTemp = pvPortMallocStackMem(configIDLE_TASK_STACK_SIZE);
+        pxTCBBufferTemp = pvPortMallocTcbMem(sizeof(StaticTask_t));
+    }
+    #endif /* portSTACK_GROWTH */
+
     assert(pxTCBBufferTemp != NULL);
     assert(pxStackBufferTemp != NULL);
     //Write back pointers
@@ -184,9 +199,24 @@ void vApplicationGetTimerTaskMemory(StaticTask_t **ppxTimerTaskTCBBuffer,
 {
     StaticTask_t *pxTCBBufferTemp;
     StackType_t *pxStackBufferTemp;
-    //Allocate TCB and stack buffer in internal memory
-    pxTCBBufferTemp = pvPortMallocTcbMem(sizeof(StaticTask_t));
-    pxStackBufferTemp = pvPortMallocStackMem(configTIMER_TASK_STACK_DEPTH);
+
+    /* If the stack grows down then allocate the stack then the TCB so the stack
+     * does not grow into the TCB.  Likewise if the stack grows up then allocate
+     * the TCB then the stack. */
+    #if (portSTACK_GROWTH > 0)
+    {
+        //Allocate TCB and stack buffer in internal memory
+        pxTCBBufferTemp = pvPortMallocTcbMem(sizeof(StaticTask_t));
+        pxStackBufferTemp = pvPortMallocStackMem(configTIMER_TASK_STACK_DEPTH);
+    }
+    #else /* portSTACK_GROWTH */
+    {
+        //Allocate TCB and stack buffer in internal memory
+        pxStackBufferTemp = pvPortMallocStackMem(configTIMER_TASK_STACK_DEPTH);
+        pxTCBBufferTemp = pvPortMallocTcbMem(sizeof(StaticTask_t));
+    }
+    #endif /* portSTACK_GROWTH */
+
     assert(pxTCBBufferTemp != NULL);
     assert(pxStackBufferTemp != NULL);
     //Write back pointers

components/freertos/esp_additions/include/freertos/task_snapshot.h

@@ -54,8 +54,9 @@ TaskHandle_t pxTaskGetNext( TaskHandle_t pxTask );
  * 		 does not acquire any locks.
  * @param[in] pxTask Task's handle
  * @param[out] pxTaskSnapshot Snapshot of the task
+ * @return pdTRUE if operation was successful else pdFALSE
  */
-void vTaskGetSnapshot( TaskHandle_t pxTask, TaskSnapshot_t *pxTaskSnapshot );
+BaseType_t vTaskGetSnapshot( TaskHandle_t pxTask, TaskSnapshot_t *pxTaskSnapshot );
 
 /**
  * @brief Fill an array of TaskSnapshot_t structures for every task in the system

components/freertos/esp_additions/private_include/freertos_tasks_c_additions.h

@@ -162,14 +162,17 @@ TaskHandle_t pxTaskGetNext( TaskHandle_t pxTask )
     return pxNextTCB;
 }
 
-void vTaskGetSnapshot( TaskHandle_t pxTask, TaskSnapshot_t *pxTaskSnapshot )
+BaseType_t vTaskGetSnapshot( TaskHandle_t pxTask, TaskSnapshot_t *pxTaskSnapshot )
 {
-    configASSERT( portVALID_TCB_MEM(pxTask) );
-    configASSERT( pxTaskSnapshot != NULL );
+    if (portVALID_TCB_MEM(pxTask) == false || pxTaskSnapshot == NULL) {
+        return pdFALSE;
+    }
+
     TCB_t *pxTCB = (TCB_t *)pxTask;
     pxTaskSnapshot->pxTCB = pxTCB;
     pxTaskSnapshot->pxTopOfStack = (StackType_t *)pxTCB->pxTopOfStack;
     pxTaskSnapshot->pxEndOfStack = (StackType_t *)pxTCB->pxEndOfStack;
+    return pdTRUE;
 }
 
 UBaseType_t uxTaskGetSnapshotAll( TaskSnapshot_t * const pxTaskSnapshotArray, const UBaseType_t uxArrayLength, UBaseType_t * const pxTCBSize )

components/freertos/test/integration/tasks/test_tasks_snapshot.c

@@ -138,7 +138,8 @@ TEST_CASE("Task snapshot: Iterate", "[freertos]")
     TaskHandle_t cur_task_handle = pxTaskGetNext(NULL);
     while (cur_task_handle != NULL) {
         // Get the task's snapshot
-        vTaskGetSnapshot(cur_task_handle, &task_snapshots[num_snapshots]);
+        BaseType_t Result = vTaskGetSnapshot(cur_task_handle, &task_snapshots[num_snapshots]);
+        TEST_ASSERT_EQUAL(pdTRUE, Result);
         num_snapshots++;
         cur_task_handle = pxTaskGetNext(cur_task_handle);
     }

docs/en/migration-guides/freertos.rst

@@ -14,6 +14,7 @@ Tasks Snapshot
 
 The header ``task_snapshot.h`` has been removed from ``freertos/task.h``. ESP-IDF developers should include ``"freertos/task_snapshot.h``` in case they need tasks snapshot API.
 
+The function :cpp:func:`vTaskGetSnapshot` now returns ``BaseType_t``. Return value shall be ``pdTRUE`` on success and ``pdFALSE`` otherwise.
 
 FreeRTOS Asserts
 ----------------