From 4d2eefd7fb91482f1327f28f14112201e0b45dff Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Fri, 6 Jun 2025 23:12:37 -0700 Subject: [PATCH] perf header: Display message if BPF/BTF info is empty The perf.data file may contain a bpf_prog_info or bpf_btf feature. If the contents of these are empty then nothing is displayed. Rather than display nothing and not account for the file space, display an empty message. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250617223356.2752099-4-irogers@google.com Signed-off-by: Namhyung Kim --- tools/perf/util/header.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 3f1b78810059..a9538bb1004d 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1814,6 +1814,9 @@ static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp) root = &env->bpf_progs.infos; next = rb_first(root); + if (!next) + printf("# bpf_prog_info empty\n"); + while (next) { struct bpf_prog_info_node *node; @@ -1838,6 +1841,9 @@ static void print_bpf_btf(struct feat_fd *ff, FILE *fp) root = &env->bpf_progs.btfs; next = rb_first(root); + if (!next) + printf("# btf info empty\n"); + while (next) { struct btf_node *node; -- 2.25.1