1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020 Facebook */
3 #include "vmlinux.h"
4 #include <bpf/bpf_helpers.h>
5 #include <bpf/bpf_tracing.h>
6 
7 char _license[] SEC("license") = "GPL";
8 
9 SEC("iter/task")
10 int dump_task(struct bpf_iter__task *ctx)
11 {
12 	struct seq_file *seq = ctx->meta->seq;
13 	struct task_struct *task = ctx->task;
14 
15 	if (task == (void *)0) {
16 		BPF_SEQ_PRINTF(seq, "    === END ===\n");
17 		return 0;
18 	}
19 
20 	if (ctx->meta->seq_num == 0)
21 		BPF_SEQ_PRINTF(seq, "    tgid      gid\n");
22 
23 	BPF_SEQ_PRINTF(seq, "%8d %8d\n", task->tgid, task->pid);
24 	return 0;
25 }
26