Commit edac4b5b authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
Browse files

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: default avatarSong Liu <song@kernel.org>
Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20230116101009.23694-3-jolsa@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 07cc2c93

tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c

+14 −5
Original line number Diff line number Diff line
@@ -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"))