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selftests/bpf: Add uprobe_multi cookie test 

Adding test for cookies setup/retrieval in uprobe_link uprobes
and making sure bpf_get_attach_cookie works properly.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20230809083440.3209381-27-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2023-08-09 10:34:38 +02:00 committed by Alexei Starovoitov
parent 85209e839f
commit e7cf9a48f8
1 changed files with 78 additions and 0 deletions
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78
tools/testing/selftests/bpf/prog_tests/bpf_cookie.c
View File

@ -11,6 +11,7 @@
#include <bpf/btf.h>
#include "test_bpf_cookie.skel.h"
#include "kprobe_multi.skel.h"
#include "uprobe_multi.skel.h"
/* uprobe attach point */
static noinline void trigger_func(void)
@ -239,6 +240,81 @@ cleanup:
bpf_link__destroy(link1);
kprobe_multi__destroy(skel);
}
/* defined in prog_tests/uprobe_multi_test.c */
void uprobe_multi_func_1(void);
void uprobe_multi_func_2(void);
void uprobe_multi_func_3(void);
static void uprobe_multi_test_run(struct uprobe_multi *skel)
{
skel->bss->uprobe_multi_func_1_addr = (__u64) uprobe_multi_func_1;
skel->bss->uprobe_multi_func_2_addr = (__u64) uprobe_multi_func_2;
skel->bss->uprobe_multi_func_3_addr = (__u64) uprobe_multi_func_3;
skel->bss->pid = getpid();
skel->bss->test_cookie = true;
uprobe_multi_func_1();
uprobe_multi_func_2();
uprobe_multi_func_3();
ASSERT_EQ(skel->bss->uprobe_multi_func_1_result, 1, "uprobe_multi_func_1_result");
ASSERT_EQ(skel->bss->uprobe_multi_func_2_result, 1, "uprobe_multi_func_2_result");
ASSERT_EQ(skel->bss->uprobe_multi_func_3_result, 1, "uprobe_multi_func_3_result");
ASSERT_EQ(skel->bss->uretprobe_multi_func_1_result, 1, "uretprobe_multi_func_1_result");
ASSERT_EQ(skel->bss->uretprobe_multi_func_2_result, 1, "uretprobe_multi_func_2_result");
ASSERT_EQ(skel->bss->uretprobe_multi_func_3_result, 1, "uretprobe_multi_func_3_result");
}
static void uprobe_multi_attach_api_subtest(void)
{
struct bpf_link *link1 = NULL, *link2 = NULL;
struct uprobe_multi *skel = NULL;
LIBBPF_OPTS(bpf_uprobe_multi_opts, opts);
const char *syms[3] = {
"uprobe_multi_func_1",
"uprobe_multi_func_2",
"uprobe_multi_func_3",
};
__u64 cookies[3];
cookies[0] = 3; /* uprobe_multi_func_1 */
cookies[1] = 1; /* uprobe_multi_func_2 */
cookies[2] = 2; /* uprobe_multi_func_3 */
opts.syms = syms;
opts.cnt = ARRAY_SIZE(syms);
opts.cookies = &cookies[0];
skel = uprobe_multi__open_and_load();
if (!ASSERT_OK_PTR(skel, "uprobe_multi"))
goto cleanup;
link1 = bpf_program__attach_uprobe_multi(skel->progs.uprobe, -1,
"/proc/self/exe", NULL, &opts);
if (!ASSERT_OK_PTR(link1, "bpf_program__attach_uprobe_multi"))
goto cleanup;
cookies[0] = 2; /* uprobe_multi_func_1 */
cookies[1] = 3; /* uprobe_multi_func_2 */
cookies[2] = 1; /* uprobe_multi_func_3 */
opts.retprobe = true;
link2 = bpf_program__attach_uprobe_multi(skel->progs.uretprobe, -1,
"/proc/self/exe", NULL, &opts);
if (!ASSERT_OK_PTR(link2, "bpf_program__attach_uprobe_multi_retprobe"))
goto cleanup;
uprobe_multi_test_run(skel);
cleanup:
bpf_link__destroy(link2);
bpf_link__destroy(link1);
uprobe_multi__destroy(skel);
}
static void uprobe_subtest(struct test_bpf_cookie *skel)
{
DECLARE_LIBBPF_OPTS(bpf_uprobe_opts, opts);
@ -515,6 +591,8 @@ void test_bpf_cookie(void)
kprobe_multi_attach_api_subtest();
if (test__start_subtest("uprobe"))
uprobe_subtest(skel);
if (test__start_subtest("multi_uprobe_attach_api"))
uprobe_multi_attach_api_subtest();
if (test__start_subtest("tracepoint"))
tp_subtest(skel);
if (test__start_subtest("perf_event"))