// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019 Facebook #include <linux/sched.h> #include <linux/ptrace.h> #include <stdint.h> #include <stddef.h> #include <stdbool.h> #include <linux/bpf.h> #include "bpf_helpers.h" char _license[] SEC("license") = "GPL"; SEC("raw_tracepoint/kfree_skb") int nested_loops(volatile struct pt_regs* ctx) { int i, j, sum = 0, m; for (j = 0; j < 300; j++) for (i = 0; i < j; i++) { if (j & 1) m = PT_REGS_RC(ctx); else m = j; sum += i * m; } return sum; }