| // SPDX-License-Identifier: GPL-2.0 |
| // Copyright (c) 2022 Jingxiang Zeng |
| #include <vmlinux.h> |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_core_read.h> |
| #include <bpf/bpf_tracing.h> |
| |
| #include "oomkill.h" |
| |
| struct { |
| __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); |
| __uint(key_size, sizeof(u32)); |
| __uint(value_size, sizeof(u32)); |
| } events SEC(".maps"); |
| |
| SEC("kprobe/oom_kill_process") |
| int BPF_KPROBE(oom_kill_process, struct oom_control *oc, const char *message) |
| { |
| struct data_t data; |
| |
| data.fpid = bpf_get_current_pid_tgid() >> 32; |
| data.tpid = BPF_CORE_READ(oc, chosen, tgid); |
| data.pages = BPF_CORE_READ(oc, totalpages); |
| bpf_get_current_comm(&data.fcomm, sizeof(data.fcomm)); |
| bpf_probe_read_kernel(&data.tcomm, sizeof(data.tcomm), BPF_CORE_READ(oc, chosen, comm)); |
| bpf_perf_event_output(ctx, &events, BPF_F_CURRENT_CPU, &data, sizeof(data)); |
| return 0; |
| } |
| |
| char LICENSE[] SEC("license") = "GPL"; |