diff options
Diffstat (limited to 'samples/bpf/sampleip_user.c')
| -rw-r--r-- | samples/bpf/sampleip_user.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/samples/bpf/sampleip_user.c b/samples/bpf/sampleip_user.c index 216c7ecbbbe9..6b5dc26d9701 100644 --- a/samples/bpf/sampleip_user.c +++ b/samples/bpf/sampleip_user.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * sampleip: sample instruction pointer and frequency count in a BPF map. * * Copyright 2016 Netflix, Inc. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. */ #include <stdio.h> #include <stdlib.h> @@ -109,6 +106,11 @@ static void print_ip_map(int fd) for (i = 0; i < max; i++) { if (counts[i].ip > PAGE_OFFSET) { sym = ksym_search(counts[i].ip); + if (!sym) { + printf("ksym not found. Is kallsyms loaded?\n"); + continue; + } + printf("0x%-17llx %-32s %u\n", counts[i].ip, sym->name, counts[i].count); } else { |