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selftests/bpf: Add kprobe session recursion check test

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Adding kprobe.session probe to bpf_kfunc_common_test that misses bpf
program execution due to recursion check and making sure it increases
the program missed count properly.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20250106175048.1443905-2-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa
2025-01-06 18:50:48 +01:00
committed by Alexei Starovoitov
parent 2ebadb60cb
commit bfaac2a0b9
2 changed files with 7 additions and 0 deletions
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1
tools/testing/selftests/bpf/prog_tests/missed.c
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@@ -85,6 +85,7 @@ static void test_missed_kprobe_recursion(void)
ASSERT_GE(get_missed_count(bpf_program__fd(skel->progs.test3)), 1, "test3_recursion_misses");
ASSERT_GE(get_missed_count(bpf_program__fd(skel->progs.test4)), 1, "test4_recursion_misses");
ASSERT_GE(get_missed_count(bpf_program__fd(skel->progs.test5)), 1, "test5_recursion_misses");
ASSERT_EQ(get_missed_count(bpf_program__fd(skel->progs.test6)), 1, "test6_recursion_misses");
cleanup:
missed_kprobe_recursion__destroy(skel);

6
tools/testing/selftests/bpf/progs/missed_kprobe_recursion.c
View File

@@ -46,3 +46,9 @@ int test5(struct pt_regs *ctx)
{
return 0;
}
SEC("kprobe.session/bpf_kfunc_common_test")
int test6(struct pt_regs *ctx)
{
return 0;
}