Description: add protect flag to resource task

Reviewed-by: shenwei and zhangfanfan

kernel/base/core/los_process.c

@@ -610,7 +610,6 @@ STATIC LosProcessCB *OsGetFreePCB(VOID)
     if (LOS_ListEmpty(&g_freeProcess)) {
         SCHEDULER_UNLOCK(intSave);
         PRINT_ERR("No idle PCB in the system!\n");
-        __asm__ __volatile__("swi 0");
         return NULL;
     }
 

kernel/base/core/los_task.c

@@ -766,7 +766,6 @@ LITE_OS_SEC_TEXT LosTaskCB *OsGetFreeTaskCB(VOID)
     if (LOS_ListEmpty(&g_losFreeTask)) {
         SCHEDULER_UNLOCK(intSave);
         PRINT_ERR("No idle TCB in the system!\n");
-        LOS_Panic("**************error***************\n");
         return NULL;
     }
 
@@ -1205,6 +1204,13 @@ LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskDelete(UINT32 taskID)
         OS_GOTO_ERREND();
     }
 
+    if ((taskCB->taskStatus & OS_TASK_FLAG_SYSTEM_TASK) ||
+        (taskCB->taskStatus & OS_TASK_FLAG_NO_DELETE)) {
+        SCHEDULER_UNLOCK(intSave);
+        OsBackTrace();
+        __asm__ __volatile__("swi 0");
+        return LOS_ERRNO_TSK_OPERATE_SYSTEM_TASK;
+    }
     processCB = OS_PCB_FROM_PID(taskCB->processID);
     if (processCB->threadNumber == 1) {
         if (processCB == OsCurrProcessGet()) {
@@ -1990,7 +1996,11 @@ LITE_OS_SEC_TEXT UINT32 OsCreateResourceFreeTask(VOID)
     taskInitParam.uwStackSize = OS_TASK_RESOURCE_STATCI_SIZE;
     taskInitParam.pcName = "ResourcesTask";
     taskInitParam.usTaskPrio = OS_TASK_RESOURCE_FREE_PRIORITY;
-    return LOS_TaskCreate(&taskID, &taskInitParam);
+    ret = LOS_TaskCreate(&taskID, &taskInitParam);
+    if (ret == LOS_OK) {
+        OS_TCB_FROM_TID(taskID)->taskStatus |= OS_TASK_FLAG_NO_DELETE;
+    }
+    return ret;
 }
 
 #ifdef __cplusplus

kernel/base/include/los_task_pri.h

@@ -211,6 +211,14 @@ extern SPIN_LOCK_S g_taskSpin;
  */
 #define OS_TASK_FLAG_SPECIFIES_PROCESS 0x4000U
 
+/**
+ * @ingroup los_task
+ * Flag that indicates the task property.
+ *
+ * The task is system-level task, like ResourcesTask.
+ */
+#define OS_TASK_FLAG_NO_DELETE  0x8000U
+
 /**
  * @ingroup los_task
  * Boundary on which the stack size is aligned.

kernel/common/console.c

@@ -1626,7 +1626,7 @@ VOID OsWaitConsoleSendTaskPend(UINT32 taskID)
     UINT32 i;
     CONSOLE_CB *console = NULL;
     LosTaskCB *taskCB = NULL;
-    INT32 waitTime = 30000; /* 30000: 30 seconds*/
+    INT32 waitTime = 3000; /* 3000: 3 seconds*/
 
     for (i = 0; i < CONSOLE_NUM; i++) {
         console = g_console[i];