Commit ad0dd7ae authored Nov 17, 2015 by Wang Nan Committed by Arnaldo Carvalho de Melo Nov 18, 2015

perf test: Fix 'perf test BPF' when it fails to find a suitable vmlinux



Two bugs in 'perf test BPF' are found when testing BPF prologue without
vmlinux:

 # mv /lib/modules/4.3.0-rc4+/build/vmlinux{,.bak}
 # ./perf test BPF
 37: Test BPF filter             :Failed to find the path for kernel: No such file or directory
 Ok

Test BPF should fail in this case.

After this patch:

 # ./perf test BPF
 37: Test BPF filter             :Failed to find the path for kernel: No such file or directory
  FAILED!
 # mv /lib/modules/4.3.0-rc4+/build/vmlinux{.bak,}
 # ./perf test BPF
 37: Test BPF filter             : Ok

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1447749170-175898-2-git-send-email-wangnan0@huawei.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent bbb7d492

tools/perf/tests/bpf.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -102,7 +102,6 @@ static int do_test(struct bpf_object obj, int (func)(void),
		err = parse_events_load_bpf_obj(&parse_evlist, &parse_evlist.list, obj);
		if (err \|\| list_empty(&parse_evlist.list)) {
		pr_debug("Failed to add events selected by BPF\n");
		if (!err)
		return TEST_FAIL;
		}

		@@ -157,8 +156,10 @@ static int do_test(struct bpf_object obj, int (func)(void),
		}
		}

		if (count != expect)
		if (count != expect) {
		pr_debug("BPF filter result incorrect\n");
		goto out_delete_evlist;
		}

		ret = TEST_OK;