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List: live-patching
Subject: [PATCHv3 bpf-next 2/3] selftests/bpf: Add serial_test_kprobe_multi_bench_attach_kernel/module tests
From: Jiri Olsa <jolsa () kernel ! org>
Date: 2023-01-16 10:10:08
Message-ID: 20230116101009.23694-3-jolsa () kernel ! org
[Download RAW message or body]
Add bench test for module portion of the symbols as well.
# ./test_progs -v -t kprobe_multi_bench_attach_module
bpf_testmod.ko is already unloaded.
Loading bpf_testmod.ko...
Successfully loaded bpf_testmod.ko.
test_kprobe_multi_bench_attach:PASS:get_syms 0 nsec
test_kprobe_multi_bench_attach:PASS:kprobe_multi_empty__open_and_load 0 nsec
test_kprobe_multi_bench_attach:PASS:bpf_program__attach_kprobe_multi_opts 0 nsec
test_kprobe_multi_bench_attach: found 26620 functions
test_kprobe_multi_bench_attach: attached in 0.182s
test_kprobe_multi_bench_attach: detached in 0.082s
#96 kprobe_multi_bench_attach_module:OK
Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED
Successfully unloaded bpf_testmod.ko.
It's useful for testing kprobe multi link modules resolving.
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
.../bpf/prog_tests/kprobe_multi_test.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c \
b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c index \
c6f37e825f11..113dba349a57 100644
--- a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c
@@ -322,7 +322,7 @@ static bool symbol_equal(long key1, long key2, void *ctx \
__maybe_unused) return strcmp((const char *) key1, (const char *) key2) == 0;
}
-static int get_syms(char ***symsp, size_t *cntp)
+static int get_syms(char ***symsp, size_t *cntp, bool kernel)
{
size_t cap = 0, cnt = 0, i;
char *name = NULL, **syms = NULL;
@@ -349,8 +349,9 @@ static int get_syms(char ***symsp, size_t *cntp)
}
while (fgets(buf, sizeof(buf), f)) {
- /* skip modules */
- if (strchr(buf, '['))
+ if (kernel && strchr(buf, '['))
+ continue;
+ if (!kernel && !strchr(buf, '['))
continue;
free(name);
@@ -404,7 +405,7 @@ static int get_syms(char ***symsp, size_t *cntp)
return err;
}
-void serial_test_kprobe_multi_bench_attach(void)
+static void test_kprobe_multi_bench_attach(bool kernel)
{
LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
struct kprobe_multi_empty *skel = NULL;
@@ -415,7 +416,7 @@ void serial_test_kprobe_multi_bench_attach(void)
char **syms = NULL;
size_t cnt = 0, i;
- if (!ASSERT_OK(get_syms(&syms, &cnt), "get_syms"))
+ if (!ASSERT_OK(get_syms(&syms, &cnt, kernel), "get_syms"))
return;
skel = kprobe_multi_empty__open_and_load();
@@ -453,6 +454,14 @@ void serial_test_kprobe_multi_bench_attach(void)
}
}
+void serial_test_kprobe_multi_bench_attach(void)
+{
+ if (test__start_subtest("kernel"))
+ test_kprobe_multi_bench_attach(true);
+ if (test__start_subtest("modules"))
+ test_kprobe_multi_bench_attach(false);
+}
+
void test_kprobe_multi_test(void)
{
if (!ASSERT_OK(load_kallsyms(), "load_kallsyms"))
--
2.39.0
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