samples/bpf/test_overhead_tp_kern.c

   1 /* Copyright (c) 2016 Facebook
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of version 2 of the GNU General Public
   5  * License as published by the Free Software Foundation.
   6  */
   7 #include <uapi/linux/bpf.h>
   8 #include <bpf/bpf_helpers.h>
   9
  10 /* from /sys/kernel/debug/tracing/events/task/task_rename/format */
  11 struct task_rename {
  12         __u64 pad;
  13         __u32 pid;
  14         char oldcomm[16];
  15         char newcomm[16];
  16         __u16 oom_score_adj;
  17 };
  18 SEC("tracepoint/task/task_rename")
  19 int prog(struct task_rename *ctx)
  20 {
  21         return 0;
  22 }
  23
  24 /* from /sys/kernel/debug/tracing/events/random/urandom_read/format */
  25 struct urandom_read {
  26         __u64 pad;
  27         int got_bits;
  28         int pool_left;
  29         int input_left;
  30 };
  31 SEC("tracepoint/random/urandom_read")
  32 int prog2(struct urandom_read *ctx)
  33 {
  34         return 0;
  35 }
  36 char _license[] SEC("license") = "GPL";