// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ #include <vmlinux.h> #include <bpf/bpf_tracing.h> #include "../test_kmods/bpf_testmod.h" char _license[] SEC("license") = "GPL"; pid_t tgid = 0; /* This is a test BPF program that uses struct_ops to access an argument * that may be NULL. This is a test for the verifier to ensure that it can * rip PTR_MAYBE_NULL correctly. */ SEC("struct_ops/test_maybe_null") int BPF_PROG(test_maybe_null, int dummy, struct task_struct *task) { if (task) tgid = task->tgid; return 0; } SEC(".struct_ops.link") struct bpf_testmod_ops testmod_1 = { .test_maybe_null = (void *)test_maybe_null, };