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perf bpf: Show better message when failing to load an object
Before: libbpf: license of tools/perf/examples/bpf/etcsnoop.c is GPL libbpf: section(6) version, size 4, link 0, flags 3, type=1 libbpf: kernel version of tools/perf/examples/bpf/etcsnoop.c is 41200 libbpf: section(7) .symtab, size 120, link 1, flags 0, type=2 bpf: config program 'syscalls:sys_enter_openat' libbpf: load bpf program failed: Operation not permitted libbpf: failed to load program 'syscalls:sys_enter_openat' libbpf: failed to load object 'tools/perf/examples/bpf/etcsnoop.c' bpf: load objects failed After: (just the last line changes) bpf: load objects failed: err=-4009: (Incorrect kernel version) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-wi44iid0yjfht3lcvplc75fm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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1 changed files with 3 additions and 1 deletions
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@ -747,7 +747,9 @@ int bpf__load(struct bpf_object *obj)
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err = bpf_object__load(obj);
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if (err) {
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pr_debug("bpf: load objects failed\n");
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char bf[128];
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libbpf_strerror(err, bf, sizeof(bf));
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pr_debug("bpf: load objects failed: err=%d: (%s)\n", err, bf);
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return err;
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}
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return 0;
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