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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_TASK_STORAGE);
__uint(map_flags, BPF_F_NO_PREALLOC);
__type(key, int);
__type(value, __u64);
} task_storage SEC(".maps");
int run_count = 0;
int valid_ptr_count = 0;
int null_ptr_count = 0;
SEC("fentry/exit_creds")
int BPF_PROG(trace_exit_creds, struct task_struct *task)
{
__u64 *ptr;
ptr = bpf_task_storage_get(&task_storage, task, 0,
BPF_LOCAL_STORAGE_GET_F_CREATE);
if (ptr)
__sync_fetch_and_add(&valid_ptr_count, 1);
else
__sync_fetch_and_add(&null_ptr_count, 1);
__sync_fetch_and_add(&run_count, 1);
return 0;
}
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