1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 // Copyright (c) 2021 Facebook
4 #include <bpf/bpf_helpers.h>
5 #include <bpf/bpf_tracing.h>
9 __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
10 __uint(key_size, sizeof(__u32));
11 __uint(value_size, sizeof(struct bpf_perf_event_value));
12 __uint(max_entries, 1);
13 } diff_readings SEC(".maps");
16 __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
17 __uint(key_size, sizeof(__u32));
18 __uint(value_size, sizeof(struct bpf_perf_event_value));
19 __uint(max_entries, 1);
20 } accum_readings SEC(".maps");
23 __uint(type, BPF_MAP_TYPE_HASH);
24 __uint(key_size, sizeof(__u32));
25 __uint(value_size, sizeof(__u32));
26 } filter SEC(".maps");
28 enum bperf_filter_type type = 0;
32 int BPF_PROG(fexit_XXX)
34 struct bpf_perf_event_value *diff_val, *accum_val;
35 __u32 filter_key, zero = 0;
42 case BPERF_FILTER_GLOBAL:
45 case BPERF_FILTER_CPU:
46 filter_key = bpf_get_smp_processor_id();
48 case BPERF_FILTER_PID:
49 filter_key = bpf_get_current_pid_tgid() & 0xffffffff;
51 case BPERF_FILTER_TGID:
52 filter_key = bpf_get_current_pid_tgid() >> 32;
58 accum_key = bpf_map_lookup_elem(&filter, &filter_key);
63 diff_val = bpf_map_lookup_elem(&diff_readings, &zero);
67 accum_val = bpf_map_lookup_elem(&accum_readings, accum_key);
71 accum_val->counter += diff_val->counter;
72 accum_val->enabled += diff_val->enabled;
73 accum_val->running += diff_val->running;
78 char LICENSE[] SEC("license") = "Dual BSD/GPL";