Messages in this thread Patch in this message | | | From | Roman Gushchin <> | Subject | [PATCH net-next 2/5] libbpf: prefer global symbols as bpf program name source | Date | Thu, 30 Nov 2017 13:42:59 +0000 |
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Libbpf picks the name of the first symbol in the corresponding elf section to use as a program name. But without taking symbol's scope into account it may end's up with some local label as a program name. E.g.:
$ bpftool cglist /sys/fs/cgroup/system.slice/tmp.mount/ 16 device LBB0_10
Fix this by preferring global symbols as program name. For instance:
$ bpftool cglist /sys/fs/cgroup/system.slice/tmp.mount/ 17 device bpf_prog1
Signed-off-by: Roman Gushchin <guro@fb.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jakub Kicinski <jakub.kicinski@netronome.com> --- 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 9f2410beaa18..5191afd46556 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -387,6 +387,8 @@ bpf_object__init_prog_names(struct bpf_object *obj) continue; if (sym.st_shndx != prog->idx) continue; + if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL) + continue; name = elf_strptr(obj->efile.elf, obj->efile.strtabidx, -- 2.14.3
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