whether this description is incorrect

[free-wind-0]

int* gl_ptr;
void inc_p(int* p){ (*p)++; }
void co_fp0() {
    int ct = 0;
    gl_ptr = &ct; // line 7
    aco_yield();
    check(ct);
    int* ptr = &ct;
    inc_p(ptr);   // line 11
    aco_exit();
}

void co_fp1() {
    do_sth(gl_ptr); // line 16
    aco_exit();
}

4. In the above code snippet, we assume that co_fp0 & co_fp1 shares the same share stack (they are both non-main co) and the running sequence of them is "co_fp0 -> co_fp1 -> co_fp0". Since they are sharing the same stack, the address holding in gl_ptr in co_fp1 (line 16) has totally different semantics with the gl_ptr in line 7 of co_fp0, and that kind of code would probably corrupt the execution stack of co_fp1. But the line 11 is fine because variable ct and function inc_p are in the same coroutine context. Allocating that kind of variables (need to share with other coroutines) on the heap would simply solve such problems: ```

Is co_fp0 affected? ct was modified during yield