mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
|
/* Copyright (c) 2016 Facebook
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of version 2 of the GNU General Public
|
||
|
|
* License as published by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
#include <linux/version.h>
|
||
|
|
#include <linux/ptrace.h>
|
||
|
|
#include <uapi/linux/bpf.h>
|
||
|
|
#include "bpf_helpers.h"
|
||
|
|
|
||
|
|
#define _(P) ({typeof(P) val = 0; bpf_probe_read(&val, sizeof(val), &P); val;})
|
||
|
|
|
||
|
|
SEC("kprobe/__set_task_comm")
|
||
|
|
int prog(struct pt_regs *ctx)
|
||
|
|
{
|
||
|
|
struct signal_struct *signal;
|
||
|
|
struct task_struct *tsk;
|
||
|
|
char oldcomm[16] = {};
|
||
|
|
char newcomm[16] = {};
|
||
|
|
u16 oom_score_adj;
|
||
|
|
u32 pid;
|
||
|
|
|
||
|
|
tsk = (void *)PT_REGS_PARM1(ctx);
|
||
|
|
|
||
|
|
pid = _(tsk->pid);
|
||
|
|
bpf_probe_read(oldcomm, sizeof(oldcomm), &tsk->comm);
|
||
|
|
bpf_probe_read(newcomm, sizeof(newcomm), (void *)PT_REGS_PARM2(ctx));
|
||
|
|
signal = _(tsk->signal);
|
||
|
|
oom_score_adj = _(signal->oom_score_adj);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SEC("kprobe/urandom_read")
|
||
|
|
int prog2(struct pt_regs *ctx)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
char _license[] SEC("license") = "GPL";
|
||
|
|
u32 _version SEC("version") = LINUX_VERSION_CODE;
|