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Subject[PATCH 1/5] perf test: Fix 2 bugs in 'perf test BPF'
Date
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.

This patch fixes two bugs in 'perf test BPF'. 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: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/bpf.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index c7131fa..dca3998 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -102,8 +102,7 @@ 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;
+ return TEST_FAIL;
}

snprintf(pid, sizeof(pid), "%d", getpid());
@@ -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;

--
1.8.3.4


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