| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (c) 2019 Facebook |
| 3 | #include <linux/sched.h> |
| 4 | #include <linux/ptrace.h> |
| 5 | #include <stdint.h> |
| 6 | #include <stddef.h> |
| 7 | #include <stdbool.h> |
| 8 | #include <linux/bpf.h> |
| 9 | #include "bpf_helpers.h" |
| 10 | |
| 11 | char _license[] SEC("license") = "GPL"; |
| 12 | |
| 13 | SEC("raw_tracepoint/kfree_skb") |
| 14 | int nested_loops(volatile struct pt_regs* ctx) |
| 15 | { |
| 16 | int i, j, sum = 0, m; |
| 17 | |
| 18 | for (j = 0; j < 300; j++) |
| 19 | for (i = 0; i < j; i++) { |
| 20 | if (j & 1) |
| 21 | m = PT_REGS_RC(ctx); |
| 22 | else |
| 23 | m = j; |
| 24 | sum += i * m; |
| 25 | } |
| 26 | |
| 27 | return sum; |
| 28 | } |