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| author |   Andrii Nakryiko <andrii@kernel.org> | 2023-04-17 17:21:46 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2023-04-18 12:45:10 -0700 |
| commit | 30bbfe3236b01b81ed5f4a91cd9d87a236b182e3 (patch) | |
| tree | d61ee97ae4edc217413d9531d90d07e683991f3d /tools/testing/selftests/bpf/prog_tests/log_fixup.c | |
| parent | libbpf: improve handling of unresolved kfuncs (diff) | |
| download | wireguard-linux-30bbfe3236b01b81ed5f4a91cd9d87a236b182e3.tar.xz wireguard-linux-30bbfe3236b01b81ed5f4a91cd9d87a236b182e3.zip | |
selftests/bpf: add missing __weak kfunc log fixup test
Add test validating that libbpf correctly poisons and reports __weak
unresolved kfuncs in post-processed verifier log.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230418002148.3255690-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/log_fixup.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/log_fixup.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/log_fixup.c b/tools/testing/selftests/bpf/prog_tests/log_fixup.c index bc27170bdeb0..dba71d98a227 100644 --- a/tools/testing/selftests/bpf/prog_tests/log_fixup.c +++ b/tools/testing/selftests/bpf/prog_tests/log_fixup.c @@ -135,6 +135,35 @@ cleanup: test_log_fixup__destroy(skel); } +static void missing_kfunc(void) +{ + char log_buf[8 * 1024]; + struct test_log_fixup* skel; + int err; + + skel = test_log_fixup__open(); + if (!ASSERT_OK_PTR(skel, "skel_open")) + return; + + bpf_program__set_autoload(skel->progs.use_missing_kfunc, true); + bpf_program__set_log_buf(skel->progs.use_missing_kfunc, log_buf, sizeof(log_buf)); + + err = test_log_fixup__load(skel); + if (!ASSERT_ERR(err, "load_fail")) + goto cleanup; + + ASSERT_HAS_SUBSTR(log_buf, + "0: <invalid kfunc call>\n" + "kfunc 'bpf_nonexistent_kfunc' is referenced but wasn't resolved\n", + "log_buf"); + + if (env.verbosity > VERBOSE_NONE) + printf("LOG: \n=================\n%s=================\n", log_buf); + +cleanup: + test_log_fixup__destroy(skel); +} + void test_log_fixup(void) { if (test__start_subtest("bad_core_relo_trunc_none")) @@ -147,4 +176,6 @@ void test_log_fixup(void) bad_core_relo_subprog(); if (test__start_subtest("missing_map")) missing_map(); + if (test__start_subtest("missing_kfunc")) + missing_kfunc(); } |