Commit d7417970 authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add cookies check for perf_event fill_link_info test 



Now that we get cookies for perf_event probes, adding tests
for cookie for kprobe/uprobe/tracepoint.

The perf_event test needs to be added completely and is coming
in following change.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Acked-by: default avatarSong Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240119110505.400573-6-jolsa@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 59a89706

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

+21 −5
Original line number Diff line number Diff line
@@ -32,6 +32,8 @@ static noinline void uprobe_func(void) 
	asm volatile ("");

}



#define PERF_EVENT_COOKIE 0xdeadbeef



static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long addr,

				 ssize_t offset, ssize_t entry_offset)

{
@@ -63,6 +65,8 @@ static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long add 
			ASSERT_EQ(info.perf_event.kprobe.addr, addr + entry_offset,

				  "kprobe_addr");



		ASSERT_EQ(info.perf_event.kprobe.cookie, PERF_EVENT_COOKIE, "kprobe_cookie");



		if (!info.perf_event.kprobe.func_name) {

			ASSERT_EQ(info.perf_event.kprobe.name_len, 0, "name_len");

			info.perf_event.kprobe.func_name = ptr_to_u64(&buf);
@@ -82,6 +86,8 @@ static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long add 
			goto again;

		}



		ASSERT_EQ(info.perf_event.tracepoint.cookie, PERF_EVENT_COOKIE, "tracepoint_cookie");



		err = strncmp(u64_to_ptr(info.perf_event.tracepoint.tp_name), TP_NAME,

			      strlen(TP_NAME));

		ASSERT_EQ(err, 0, "cmp_tp_name");
@@ -97,6 +103,8 @@ static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long add 
			goto again;

		}



		ASSERT_EQ(info.perf_event.uprobe.cookie, PERF_EVENT_COOKIE, "uprobe_cookie");



		err = strncmp(u64_to_ptr(info.perf_event.uprobe.file_name), UPROBE_FILE,

			      strlen(UPROBE_FILE));

			ASSERT_EQ(err, 0, "cmp_file_name");
@@ -140,6 +148,7 @@ static void test_kprobe_fill_link_info(struct test_fill_link_info *skel, 
	DECLARE_LIBBPF_OPTS(bpf_kprobe_opts, opts,

		.attach_mode = PROBE_ATTACH_MODE_LINK,

		.retprobe = type == BPF_PERF_EVENT_KRETPROBE,

		.bpf_cookie = PERF_EVENT_COOKIE,

	);

	ssize_t entry_offset = 0;

	struct bpf_link *link;
@@ -164,10 +173,13 @@ static void test_kprobe_fill_link_info(struct test_fill_link_info *skel, 


static void test_tp_fill_link_info(struct test_fill_link_info *skel)

{

	DECLARE_LIBBPF_OPTS(bpf_tracepoint_opts, opts,

		.bpf_cookie = PERF_EVENT_COOKIE,

	);

	struct bpf_link *link;

	int link_fd, err;



	link = bpf_program__attach_tracepoint(skel->progs.tp_run, TP_CAT, TP_NAME);

	link = bpf_program__attach_tracepoint_opts(skel->progs.tp_run, TP_CAT, TP_NAME, &opts);

	if (!ASSERT_OK_PTR(link, "attach_tp"))

		return;
@@ -180,13 +192,17 @@ static void test_tp_fill_link_info(struct test_fill_link_info *skel) 
static void test_uprobe_fill_link_info(struct test_fill_link_info *skel,

				       enum bpf_perf_event_type type)

{

	DECLARE_LIBBPF_OPTS(bpf_uprobe_opts, opts,

		.retprobe = type == BPF_PERF_EVENT_URETPROBE,

		.bpf_cookie = PERF_EVENT_COOKIE,

	);

	struct bpf_link *link;

	int link_fd, err;



	link = bpf_program__attach_uprobe(skel->progs.uprobe_run,

					  type == BPF_PERF_EVENT_URETPROBE,

	link = bpf_program__attach_uprobe_opts(skel->progs.uprobe_run,

					       0, /* self pid */

					  UPROBE_FILE, uprobe_offset);

					       UPROBE_FILE, uprobe_offset,

					       &opts);

	if (!ASSERT_OK_PTR(link, "attach_uprobe"))

		return;