| // SPDX-License-Identifier: GPL-2.0 |
| // Copyright (c) 2019 Facebook |
| |
| #include <linux/ptrace.h> |
| #include <linux/bpf.h> |
| #include "bpf_helpers.h" |
| |
| struct { |
| __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); |
| __uint(key_size, sizeof(int)); |
| __uint(value_size, sizeof(int)); |
| } perf_buf_map SEC(".maps"); |
| |
| SEC("kprobe/sys_nanosleep") |
| int handle_sys_nanosleep_entry(struct pt_regs *ctx) |
| { |
| int cpu = bpf_get_smp_processor_id(); |
| |
| bpf_perf_event_output(ctx, &perf_buf_map, BPF_F_CURRENT_CPU, |
| &cpu, sizeof(cpu)); |
| return 0; |
| } |
| |
| char _license[] SEC("license") = "GPL"; |
| __u32 _version SEC("version") = 1; |
