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selftests/bpf: Add cookies check for perf_event fill_link_info test

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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: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240119110505.400573-6-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2024-01-19 12:05:02 +01:00 committed by Alexei Starovoitov
parent 59a89706c4
commit d741797084
1 changed files with 21 additions and 5 deletions
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26
tools/testing/selftests/bpf/prog_tests/fill_link_info.c
View file

@ -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,
0, /* self pid */
UPROBE_FILE, uprobe_offset);
link = bpf_program__attach_uprobe_opts(skel->progs.uprobe_run,
0, /* self pid */
UPROBE_FILE, uprobe_offset,
&opts);
if (!ASSERT_OK_PTR(link, "attach_uprobe"))
return;