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selftests/bpf: Add serial_test_kprobe_multi_bench_attach_kernel/module tests 

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>
Link: https://lore.kernel.org/r/20230116101009.23694-3-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2023-01-16 11:10:08 +01:00 committed by Alexei Starovoitov
parent 07cc2c931e
commit edac4b5b18
1 changed files with 14 additions and 5 deletions
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19
tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c
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@ -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 @@ error:
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 @@ cleanup:
}
}
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"))