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selftests/bpf: Add stacktrace ips test for kprobe/kretprobe

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Adding test that attaches kprobe/kretprobe and verifies the
ORC stacktrace matches expected functions.

The test is only for ORC unwinder to keep it simple.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260126211837.472802-5-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2026-01-26 22:18:35 +01:00 committed by Andrii Nakryiko
parent 0207f94971
commit 7373f97e86
2 changed files with 57 additions and 0 deletions
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50
tools/testing/selftests/bpf/prog_tests/stacktrace_ips.c
View File

@ -137,6 +137,52 @@ static void test_stacktrace_ips_raw_tp(void)
stacktrace_ips__destroy(skel);
}
static void test_stacktrace_ips_kprobe(bool retprobe)
{
LIBBPF_OPTS(bpf_kprobe_opts, opts,
.retprobe = retprobe
);
LIBBPF_OPTS(bpf_test_run_opts, topts);
struct stacktrace_ips *skel;
skel = stacktrace_ips__open_and_load();
if (!ASSERT_OK_PTR(skel, "stacktrace_ips__open_and_load"))
return;
if (!skel->kconfig->CONFIG_UNWINDER_ORC) {
test__skip();
goto cleanup;
}
skel->links.kprobe_test = bpf_program__attach_kprobe_opts(
skel->progs.kprobe_test,
"bpf_testmod_stacktrace_test", &opts);
if (!ASSERT_OK_PTR(skel->links.kprobe_test, "bpf_program__attach_kprobe_opts"))
goto cleanup;
trigger_module_test_read(1);
load_kallsyms();
if (retprobe) {
check_stacktrace_ips(bpf_map__fd(skel->maps.stackmap), skel->bss->stack_key, 4,
ksym_get_addr("bpf_testmod_stacktrace_test_3"),
ksym_get_addr("bpf_testmod_stacktrace_test_2"),
ksym_get_addr("bpf_testmod_stacktrace_test_1"),
ksym_get_addr("bpf_testmod_test_read"));
} else {
check_stacktrace_ips(bpf_map__fd(skel->maps.stackmap), skel->bss->stack_key, 5,
ksym_get_addr("bpf_testmod_stacktrace_test"),
ksym_get_addr("bpf_testmod_stacktrace_test_3"),
ksym_get_addr("bpf_testmod_stacktrace_test_2"),
ksym_get_addr("bpf_testmod_stacktrace_test_1"),
ksym_get_addr("bpf_testmod_test_read"));
}
cleanup:
stacktrace_ips__destroy(skel);
}
static void __test_stacktrace_ips(void)
{
if (test__start_subtest("kprobe_multi"))
@ -145,6 +191,10 @@ static void __test_stacktrace_ips(void)
test_stacktrace_ips_kprobe_multi(true);
if (test__start_subtest("raw_tp"))
test_stacktrace_ips_raw_tp();
if (test__start_subtest("kprobe"))
test_stacktrace_ips_kprobe(false);
if (test__start_subtest("kretprobe"))
test_stacktrace_ips_kprobe(true);
}
#else
static void __test_stacktrace_ips(void)

7
tools/testing/selftests/bpf/progs/stacktrace_ips.c
View File

@ -31,6 +31,13 @@ int unused(void)
__u32 stack_key;
SEC("kprobe")
int kprobe_test(struct pt_regs *ctx)
{
stack_key = bpf_get_stackid(ctx, &stackmap, 0);
return 0;
}
SEC("kprobe.multi")
int kprobe_multi_test(struct pt_regs *ctx)
{