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// SPDX-License-Identifier: GPL-2.0-only
#include <stddef.h>
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
struct S {
int x;
};
struct C {
int x;
int y;
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, struct S);
} map SEC(".maps");
enum E {
E_ITEM
};
static int global_data_x = 100;
static int volatile global_data_y = 500;
__noinline int foo(const struct S *s)
{
if (s)
return bpf_get_prandom_u32() < s->x;
return 0;
}
__noinline int bar(int *x)
{
if (x)
*x &= bpf_get_prandom_u32();
return 0;
}
__noinline int baz(volatile int *x)
{
if (x)
*x &= bpf_get_prandom_u32();
return 0;
}
__noinline int qux(enum E *e)
{
if (e)
return *e;
return 0;
}
__noinline int quux(int (*arr)[10])
{
if (arr)
return (*arr)[9];
return 0;
}
__noinline int quuz(int **p)
{
if (p)
*p = NULL;
return 0;
}
SEC("cgroup_skb/ingress")
int test_cls(struct __sk_buff *skb)
{
int result = 0;
{
const struct S s = {.x = skb->len };
result |= foo(&s);
}
{
const __u32 key = 1;
const struct S *s = bpf_map_lookup_elem(&map, &key);
result |= foo(s);
}
{
const struct C c = {.x = skb->len, .y = skb->family };
result |= foo((const struct S *)&c);
}
{
result |= foo(NULL);
}
{
bar(&result);
bar(&global_data_x);
}
{
result |= baz(&global_data_y);
}
{
enum E e = E_ITEM;
result |= qux(&e);
}
{
int array[10] = {0};
result |= quux(&array);
}
{
int *p;
result |= quuz(&p);
}
return result ? 1 : 0;
}
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