1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2022 Jingxiang Zeng
3 // Copyright (c) 2022 Krisztian Fekete
4 #include <vmlinux.h>
5 #include <bpf/bpf_helpers.h>
6 #include <bpf/bpf_core_read.h>
7 #include <bpf/bpf_tracing.h>
8 #include "compat.bpf.h"
9 #include "oomkill.h"
10
11 SEC("kprobe/oom_kill_process")
BPF_KPROBE(oom_kill_process,struct oom_control * oc,const char * message)12 int BPF_KPROBE(oom_kill_process, struct oom_control *oc, const char *message)
13 {
14 struct data_t *data;
15
16 data = reserve_buf(sizeof(*data));
17 if (!data)
18 return 0;
19
20 data->fpid = bpf_get_current_pid_tgid() >> 32;
21 data->tpid = BPF_CORE_READ(oc, chosen, tgid);
22 data->pages = BPF_CORE_READ(oc, totalpages);
23 bpf_get_current_comm(&data->fcomm, sizeof(data->fcomm));
24 bpf_probe_read_kernel(&data->tcomm, sizeof(data->tcomm), BPF_CORE_READ(oc, chosen, comm));
25 submit_buf(ctx, data, sizeof(*data));
26 return 0;
27 }
28
29 char LICENSE[] SEC("license") = "GPL";
30