1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (c) 2020 Facebook
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5#include <bpf/bpf_tracing.h>
 6
 7struct {
 8	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
 9	__uint(max_entries, 1);
10	__type(key, int);
11	__type(value, int);
12} array_1 SEC(".maps");
13
14struct {
15	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
16	__uint(max_entries, 1);
17	__type(key, int);
18	__type(value, int);
19	__uint(map_flags, BPF_F_PRESERVE_ELEMS);
20} array_2 SEC(".maps");
21
22SEC("raw_tp/sched_switch")
23int BPF_PROG(read_array_1)
24{
25	struct bpf_perf_event_value val;
26
27	return bpf_perf_event_read_value(&array_1, 0, &val, sizeof(val));
28}
29
30SEC("raw_tp/task_rename")
31int BPF_PROG(read_array_2)
32{
33	struct bpf_perf_event_value val;
34
35	return bpf_perf_event_read_value(&array_2, 0, &val, sizeof(val));
36}
37
38char LICENSE[] SEC("license") = "GPL";

 1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (c) 2020 Facebook
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5#include <bpf/bpf_tracing.h>
 6
 7struct {
 8	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
 9	__uint(max_entries, 1);
10	__type(key, int);
11	__type(value, int);
12} array_1 SEC(".maps");
13
14struct {
15	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
16	__uint(max_entries, 1);
17	__type(key, int);
18	__type(value, int);
19	__uint(map_flags, BPF_F_PRESERVE_ELEMS);
20} array_2 SEC(".maps");
21
22SEC("raw_tp/sched_switch")
23int BPF_PROG(read_array_1)
24{
25	struct bpf_perf_event_value val;
26
27	return bpf_perf_event_read_value(&array_1, 0, &val, sizeof(val));
28}
29
30SEC("raw_tp/task_rename")
31int BPF_PROG(read_array_2)
32{
33	struct bpf_perf_event_value val;
34
35	return bpf_perf_event_read_value(&array_2, 0, &val, sizeof(val));
36}
37
38char LICENSE[] SEC("license") = "GPL";