// SPDX-License-Identifier: GPL-2.0
|
/* Copyright (c) 2020 Facebook */
|
|
#include "vmlinux.h"
|
#include <asm/unistd.h>
|
#include <bpf/bpf_helpers.h>
|
#include <bpf/bpf_tracing.h>
|
#include <bpf/bpf_core_read.h>
|
|
#define MY_TV_NSEC 1337
|
|
bool tp_called = false;
|
bool raw_tp_called = false;
|
bool tp_btf_called = false;
|
bool kprobe_called = false;
|
bool fentry_called = false;
|
|
SEC("tp/syscalls/sys_enter_nanosleep")
|
int handle__tp(struct trace_event_raw_sys_enter *args)
|
{
|
struct __kernel_timespec *ts;
|
long tv_nsec;
|
|
if (args->id != __NR_nanosleep)
|
return 0;
|
|
ts = (void *)args->args[0];
|
if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) ||
|
tv_nsec != MY_TV_NSEC)
|
return 0;
|
|
tp_called = true;
|
return 0;
|
}
|
|
SEC("raw_tp/sys_enter")
|
int BPF_PROG(handle__raw_tp, struct pt_regs *regs, long id)
|
{
|
struct __kernel_timespec *ts;
|
long tv_nsec;
|
|
if (id != __NR_nanosleep)
|
return 0;
|
|
ts = (void *)PT_REGS_PARM1_CORE(regs);
|
if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) ||
|
tv_nsec != MY_TV_NSEC)
|
return 0;
|
|
raw_tp_called = true;
|
return 0;
|
}
|
|
SEC("tp_btf/sys_enter")
|
int BPF_PROG(handle__tp_btf, struct pt_regs *regs, long id)
|
{
|
struct __kernel_timespec *ts;
|
long tv_nsec;
|
|
if (id != __NR_nanosleep)
|
return 0;
|
|
ts = (void *)PT_REGS_PARM1_CORE(regs);
|
if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) ||
|
tv_nsec != MY_TV_NSEC)
|
return 0;
|
|
tp_btf_called = true;
|
return 0;
|
}
|
|
SEC("kprobe/hrtimer_start_range_ns")
|
int BPF_KPROBE(handle__kprobe, struct hrtimer *timer, ktime_t tim, u64 delta_ns,
|
const enum hrtimer_mode mode)
|
{
|
if (tim == MY_TV_NSEC)
|
kprobe_called = true;
|
return 0;
|
}
|
|
SEC("fentry/hrtimer_start_range_ns")
|
int BPF_PROG(handle__fentry, struct hrtimer *timer, ktime_t tim, u64 delta_ns,
|
const enum hrtimer_mode mode)
|
{
|
if (tim == MY_TV_NSEC)
|
fentry_called = true;
|
return 0;
|
}
|
|
char _license[] SEC("license") = "GPL";
|
