1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun // Copyright (c) 2019 Facebook 3*4882a593Smuzhiyun #include <linux/sched.h> 4*4882a593Smuzhiyun #include <linux/ptrace.h> 5*4882a593Smuzhiyun #include <stdint.h> 6*4882a593Smuzhiyun #include <stddef.h> 7*4882a593Smuzhiyun #include <stdbool.h> 8*4882a593Smuzhiyun #include <linux/bpf.h> 9*4882a593Smuzhiyun #include <bpf/bpf_helpers.h> 10*4882a593Smuzhiyun #include <bpf/bpf_tracing.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun char _license[] SEC("license") = "GPL"; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun SEC("raw_tracepoint/consume_skb") while_true(volatile struct pt_regs * ctx)15*4882a593Smuzhiyunint while_true(volatile struct pt_regs* ctx) 16*4882a593Smuzhiyun { 17*4882a593Smuzhiyun int i = 0; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun while (true) { 20*4882a593Smuzhiyun if (PT_REGS_RC(ctx) & 1) 21*4882a593Smuzhiyun i += 3; 22*4882a593Smuzhiyun else 23*4882a593Smuzhiyun i += 7; 24*4882a593Smuzhiyun if (i > 40) 25*4882a593Smuzhiyun break; 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun return i; 29*4882a593Smuzhiyun } 30