tools/testing/selftests/bpf/progs/test_overhead.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2019 Facebook */
   3 #include <stdbool.h>
   4 #include <stddef.h>
   5 #include <linux/bpf.h>
   6 #include <linux/ptrace.h>
   7 #include <bpf/bpf_helpers.h>
   8 #include <bpf/bpf_tracing.h>
   9
  10 struct task_struct;
  11
  12 SEC("kprobe/__set_task_comm")
  13 int BPF_KPROBE(prog1, struct task_struct *tsk, const char *buf, bool exec)
  14 {
  15         return !tsk;
  16 }
  17
  18 SEC("kretprobe/__set_task_comm")
  19 int BPF_KRETPROBE(prog2, int ret)
  20 {
  21         return ret;
  22 }
  23
  24 SEC("raw_tp/task_rename")
  25 int prog3(struct bpf_raw_tracepoint_args *ctx)
  26 {
  27         return !ctx->args[0];
  28 }
  29
  30 SEC("fentry/__set_task_comm")
  31 int BPF_PROG(prog4, struct task_struct *tsk, const char *buf, bool exec)
  32 {
  33         return 0;
  34 }
  35
  36 SEC("fexit/__set_task_comm")
  37 int BPF_PROG(prog5, struct task_struct *tsk, const char *buf, bool exec)
  38 {
  39         return 0;
  40 }
  41
  42 char _license[] SEC("license") = "GPL";