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1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2022, Oracle and/or its affiliates. */3 4#include "vmlinux.h"5 6#include <bpf/bpf_helpers.h>7#include <bpf/bpf_tracing.h>8#include "bpf_misc.h"9 10__u32 perfbuf_val = 0;11__u32 ringbuf_val = 0;12 13int test_pid;14 15struct {16 __uint(type, BPF_MAP_TYPE_ARRAY);17 __uint(max_entries, 1);18 __type(key, __u32);19 __type(value, __u32);20} array SEC(".maps");21 22struct {23 __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);24 __uint(max_entries, 1);25 __type(key, __u32);26 __type(value, __u32);27} percpu_array SEC(".maps");28 29struct {30 __uint(type, BPF_MAP_TYPE_HASH);31 __uint(max_entries, 1);32 __type(key, __u32);33 __type(value, __u32);34} hash SEC(".maps");35 36struct {37 __uint(type, BPF_MAP_TYPE_PERCPU_HASH);38 __uint(max_entries, 1);39 __type(key, __u32);40 __type(value, __u32);41} percpu_hash SEC(".maps");42 43struct {44 __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);45 __type(key, __u32);46 __type(value, __u32);47} perfbuf SEC(".maps");48 49struct {50 __uint(type, BPF_MAP_TYPE_RINGBUF);51 __uint(max_entries, 1 << 12);52} ringbuf SEC(".maps");53 54struct {55 __uint(type, BPF_MAP_TYPE_PROG_ARRAY);56 __uint(max_entries, 1);57 __uint(key_size, sizeof(__u32));58 __uint(value_size, sizeof(__u32));59} prog_array SEC(".maps");60 61SEC("fentry/" SYS_PREFIX "sys_nanosleep")62int sys_nanosleep_enter(void *ctx)63{64 int cur_pid;65 66 cur_pid = bpf_get_current_pid_tgid() >> 32;67 68 if (cur_pid != test_pid)69 return 0;70 71 bpf_perf_event_output(ctx, &perfbuf, BPF_F_CURRENT_CPU, &perfbuf_val, sizeof(perfbuf_val));72 bpf_ringbuf_output(&ringbuf, &ringbuf_val, sizeof(ringbuf_val), 0);73 74 return 0;75}76 77SEC("perf_event")78int handle_perf_event(void *ctx)79{80 return 0;81}82 83char _license[] SEC("license") = "GPL";84