5ff54dedf3
Add prog test for accessing integer type of variable array in tracing program. In addition, hook load_balance function to access sd->span[0], only to confirm whether the load is successful. Because there is no direct way to trigger load_balance call. Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com> Link: https://lore.kernel.org/r/20230420032735.27760-3-zhoufeng.zf@bytedance.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
20 lines
371 B
C
20 lines
371 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2023 Bytedance */
|
|
|
|
#include "vmlinux.h"
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
|
|
unsigned long span = 0;
|
|
|
|
SEC("fentry/load_balance")
|
|
int BPF_PROG(fentry_fentry, int this_cpu, struct rq *this_rq,
|
|
struct sched_domain *sd)
|
|
{
|
|
span = sd->span[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|