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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-07-31 16:58:57 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-07-31 16:58:57 +0200 |
| commit | 739e2edc848af30fefa66d6c422c00ca9a701c06 (patch) | |
| tree | d49fbe91824a2d4861736069b93db15790664446 /tools/perf | |
| parent | perf list: Unify metric group description format with PMU event description (diff) | |
| download | linux-739e2edc848af30fefa66d6c422c00ca9a701c06.tar.xz linux-739e2edc848af30fefa66d6c422c00ca9a701c06.zip | |
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>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/bpf-loader.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index cee658733e2c..3d02ae38ec56 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -747,7 +747,9 @@ int bpf__load(struct bpf_object *obj) err = bpf_object__load(obj); if (err) { - pr_debug("bpf: load objects failed\n"); + char bf[128]; + libbpf_strerror(err, bf, sizeof(bf)); + pr_debug("bpf: load objects failed: err=%d: (%s)\n", err, bf); return err; } return 0; |