netdev - [PATCH perf/core 2/5] libbpf: Load prog's instructions after prog_prepare_load

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Message-Id: <20220422100025.1469207-3-jolsa@kernel.org>
Date:   Fri, 22 Apr 2022 12:00:22 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Cc:     linux-perf-users@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH perf/core 2/5] libbpf: Load prog's instructions after prog_prepare_load_fn callback

We can have changed instructions after calling
prog_prepare_load_fn callback, reload them.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/lib/bpf/libbpf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 284790d81c1b..c8df74e5f658 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -6695,6 +6695,8 @@ static int bpf_object_load_prog_instance(struct bpf_object *obj, struct bpf_prog
 				prog->name, err);
 			return err;
 		}
+		insns = prog->insns;
+		insns_cnt = prog->insns_cnt;
 	}
 
 	if (obj->gen_loader) {
-- 
2.35.1