| #include <linux/ptrace.h> |
| #include <linux/version.h> |
| #include <uapi/linux/bpf.h> |
| struct bpf_map_def SEC("maps") counters = { |
| .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY, |
| .value_size = sizeof(u32), |
| struct bpf_map_def SEC("maps") values = { |
| .type = BPF_MAP_TYPE_HASH, |
| .value_size = sizeof(u64), |
| SEC("kprobe/htab_map_get_next_key") |
| int bpf_prog1(struct pt_regs *ctx) |
| u32 key = bpf_get_smp_processor_id(); |
| count = bpf_perf_event_read(&counters, key); |
| if (error <= -2 && error >= -22) |
| val = bpf_map_lookup_elem(&values, &key); |
| bpf_map_update_elem(&values, &key, &count, BPF_NOEXIST); |
| char _license[] SEC("license") = "GPL"; |
| u32 _version SEC("version") = LINUX_VERSION_CODE; |