1*387f9dfdSAndroid Build Coastguard Worker // SPDX-License-Identifier: GPL-2.0
2*387f9dfdSAndroid Build Coastguard Worker // Copyright (c) 2022 Jingxiang Zeng
3*387f9dfdSAndroid Build Coastguard Worker // Copyright (c) 2022 Krisztian Fekete
4*387f9dfdSAndroid Build Coastguard Worker #include <vmlinux.h>
5*387f9dfdSAndroid Build Coastguard Worker #include <bpf/bpf_helpers.h>
6*387f9dfdSAndroid Build Coastguard Worker #include <bpf/bpf_core_read.h>
7*387f9dfdSAndroid Build Coastguard Worker #include <bpf/bpf_tracing.h>
8*387f9dfdSAndroid Build Coastguard Worker #include "compat.bpf.h"
9*387f9dfdSAndroid Build Coastguard Worker #include "oomkill.h"
10*387f9dfdSAndroid Build Coastguard Worker
11*387f9dfdSAndroid Build Coastguard Worker SEC("kprobe/oom_kill_process")
BPF_KPROBE(oom_kill_process,struct oom_control * oc,const char * message)12*387f9dfdSAndroid Build Coastguard Worker int BPF_KPROBE(oom_kill_process, struct oom_control *oc, const char *message)
13*387f9dfdSAndroid Build Coastguard Worker {
14*387f9dfdSAndroid Build Coastguard Worker struct data_t *data;
15*387f9dfdSAndroid Build Coastguard Worker
16*387f9dfdSAndroid Build Coastguard Worker data = reserve_buf(sizeof(*data));
17*387f9dfdSAndroid Build Coastguard Worker if (!data)
18*387f9dfdSAndroid Build Coastguard Worker return 0;
19*387f9dfdSAndroid Build Coastguard Worker
20*387f9dfdSAndroid Build Coastguard Worker data->fpid = bpf_get_current_pid_tgid() >> 32;
21*387f9dfdSAndroid Build Coastguard Worker data->tpid = BPF_CORE_READ(oc, chosen, tgid);
22*387f9dfdSAndroid Build Coastguard Worker data->pages = BPF_CORE_READ(oc, totalpages);
23*387f9dfdSAndroid Build Coastguard Worker bpf_get_current_comm(&data->fcomm, sizeof(data->fcomm));
24*387f9dfdSAndroid Build Coastguard Worker bpf_probe_read_kernel(&data->tcomm, sizeof(data->tcomm), BPF_CORE_READ(oc, chosen, comm));
25*387f9dfdSAndroid Build Coastguard Worker submit_buf(ctx, data, sizeof(*data));
26*387f9dfdSAndroid Build Coastguard Worker return 0;
27*387f9dfdSAndroid Build Coastguard Worker }
28*387f9dfdSAndroid Build Coastguard Worker
29*387f9dfdSAndroid Build Coastguard Worker char LICENSE[] SEC("license") = "GPL";
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