c6678 Task stack overrun

hello:

I am using the sysbios, and I use core0 run 4 Tasks, and Core1 run 2 tasks,  So the project has 6 Tasks, below is my code

void main()

{

 if(DNUM == 0)

{

  Task_create();

//.....create 4 tasks

}

else

{

  Task_create();

//.....create 2 tasks

}

Bios_start();

}

I find that some tasks' stack created by core0 is the same with tasks created by core1, I don't know why?? My project has some stack over run!

and I want to find where the task's stack placed!

Thanks!