42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/* Copyright (c) 2016 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include "vmlinux.h"
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#include <linux/version.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include <bpf/bpf_core_read.h>
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SEC("kprobe/__set_task_comm")
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int prog(struct pt_regs *ctx)
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{
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struct signal_struct *signal;
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struct task_struct *tsk;
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char oldcomm[TASK_COMM_LEN] = {};
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char newcomm[TASK_COMM_LEN] = {};
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u16 oom_score_adj;
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u32 pid;
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tsk = (void *)PT_REGS_PARM1_CORE(ctx);
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pid = BPF_CORE_READ(tsk, pid);
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bpf_core_read_str(oldcomm, sizeof(oldcomm), &tsk->comm);
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bpf_core_read_str(newcomm, sizeof(newcomm),
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(void *)PT_REGS_PARM2(ctx));
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signal = BPF_CORE_READ(tsk, signal);
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oom_score_adj = BPF_CORE_READ(signal, oom_score_adj);
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return 0;
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}
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SEC("kprobe/fib_table_lookup")
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int prog2(struct pt_regs *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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u32 _version SEC("version") = LINUX_VERSION_CODE;
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