xref: /OK3568_Linux_fs/kernel/tools/testing/selftests/bpf/progs/test_tracepoint.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright (c) 2017 Facebook
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun #include <linux/bpf.h>
5*4882a593Smuzhiyun #include <bpf/bpf_helpers.h>
6*4882a593Smuzhiyun 
7*4882a593Smuzhiyun /* taken from /sys/kernel/debug/tracing/events/sched/sched_switch/format */
8*4882a593Smuzhiyun struct sched_switch_args {
9*4882a593Smuzhiyun 	unsigned long long pad;
10*4882a593Smuzhiyun 	char prev_comm[16];
11*4882a593Smuzhiyun 	int prev_pid;
12*4882a593Smuzhiyun 	int prev_prio;
13*4882a593Smuzhiyun 	long long prev_state;
14*4882a593Smuzhiyun 	char next_comm[16];
15*4882a593Smuzhiyun 	int next_pid;
16*4882a593Smuzhiyun 	int next_prio;
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun SEC("tracepoint/sched/sched_switch")
oncpu(struct sched_switch_args * ctx)20*4882a593Smuzhiyun int oncpu(struct sched_switch_args *ctx)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun 	return 0;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun 
25*4882a593Smuzhiyun char _license[] SEC("license") = "GPL";
26*4882a593Smuzhiyun __u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */
27