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| author |   Jiri Olsa <jolsa@kernel.org> | 2022-03-16 13:24:16 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2022-03-17 20:17:19 -0700 |
| commit | f7a11eeccb11185437f4da1c80b66b857d1e906f (patch) | |
| tree | 22061e9e6b4da7212c81774c2bb1432bd28dbc04 /tools/testing/selftests/bpf/trace_helpers.c | |
| parent | libbpf: Add bpf_program__attach_kprobe_multi_opts function (diff) | |
| download | linux-dev-f7a11eeccb11185437f4da1c80b66b857d1e906f.tar.xz linux-dev-f7a11eeccb11185437f4da1c80b66b857d1e906f.zip | |
selftests/bpf: Add kprobe_multi attach test
Adding kprobe_multi attach test that uses new fprobe interface to
attach kprobe program to multiple functions.
The test is attaching programs to bpf_fentry_test* functions and
uses single trampoline program bpf_prog_test_run to trigger
bpf_fentry_test* functions.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220316122419.933957-11-jolsa@kernel.org
Diffstat (limited to 'tools/testing/selftests/bpf/trace_helpers.c')
| -rw-r--r-- | tools/testing/selftests/bpf/trace_helpers.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c index ca6abae9b09c..3d6217e3aff7 100644 --- a/tools/testing/selftests/bpf/trace_helpers.c +++ b/tools/testing/selftests/bpf/trace_helpers.c @@ -34,6 +34,13 @@ int load_kallsyms(void) if (!f) return -ENOENT; + /* + * This is called/used from multiplace places, + * load symbols just once. + */ + if (sym_cnt) + return 0; + while (fgets(buf, sizeof(buf), f)) { if (sscanf(buf, "%p %c %s", &addr, &symbol, func) != 3) break; |