LXR linux/tools/testing/selftests/bpf/progs/test_send_signal

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (c) 2019 Facebook
   3#include <linux/bpf.h>
   4#include <linux/version.h>
   5#include <bpf/bpf_helpers.h>
   6
   7__u32 sig = 0, pid = 0, status = 0, signal_thread = 0;
   8
   9static __always_inline int bpf_send_signal_test(void *ctx)
  10{
  11        int ret;
  12
  13        if (status != 0 || sig == 0 || pid == 0)
  14                return 0;
  15
  16        if ((bpf_get_current_pid_tgid() >> 32) == pid) {
  17                if (signal_thread)
  18                        ret = bpf_send_signal_thread(sig);
  19                else
  20                        ret = bpf_send_signal(sig);
  21                if (ret == 0)
  22                        status = 1;
  23        }
  24
  25        return 0;
  26}
  27
  28SEC("tracepoint/syscalls/sys_enter_nanosleep")
  29int send_signal_tp(void *ctx)
  30{
  31        return bpf_send_signal_test(ctx);
  32}
  33
  34SEC("tracepoint/sched/sched_switch")
  35int send_signal_tp_sched(void *ctx)
  36{
  37        return bpf_send_signal_test(ctx);
  38}
  39
  40SEC("perf_event")
  41int send_signal_perf(void *ctx)
  42{
  43        return bpf_send_signal_test(ctx);
  44}
  45
  46char __license[] SEC("license") = "GPL";
  47