任务栈溢出检查

方法1.栈顶地址是否小于等于栈底

在FreeRTOSConfig.h中，配置

点击查看代码

#define configCHECK_FOR_STACK_OVERFLOW 1

在StackMacros.h文件中可以看到如下代码

点击查看代码

#if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH < 0 ) )

	/* Only the current stack state is to be checked. */
	#define taskCHECK_FOR_STACK_OVERFLOW()																\
	{																									\
		/* Is the currently saved stack pointer within the stack limit? */								\
		if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack )										\
		{																								\
			vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );	\
		}																								\
	}

#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */

方法2.栈底的4个word的在任务创建赋值的初始值，是否被修改

在FreeRTOSConfig.h中，配置

点击查看代码

#define configCHECK_FOR_STACK_OVERFLOW 2

在StackMacros.h文件中可以看到如下代码

点击查看代码

#if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )

	#define taskCHECK_FOR_STACK_OVERFLOW()																\
	{																									\
		const uint32_t * const pulStack = ( uint32_t * ) pxCurrentTCB->pxStack;							\
		const uint32_t ulCheckValue = ( uint32_t ) 0xa5a5a5a5;											\
																										\
		if( ( pulStack[ 0 ] != ulCheckValue ) ||												\
			( pulStack[ 1 ] != ulCheckValue ) ||												\
			( pulStack[ 2 ] != ulCheckValue ) ||												\
			( pulStack[ 3 ] != ulCheckValue ) )												\
		{																								\
			vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );	\
		}																								\
	}

#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */

栈溢出处理函数，可在main.c中定义如下：

点击查看代码

void vApplicationStackOverflowHook( TaskHandle_t xTask, char *pcTaskName )
{
	dbg_printf("Task Stack Overflow!!! Task name = %s\n", pcTaskName);
	while(1);
    // 处理栈溢出的代码
    // 例如：记录错误，重启任务等
}