@@ -410,6 +410,56 @@ static void pe_subtest(struct test_bpf_cookie *skel)
bpf_link__destroy(link);
}
+static void tracing_subtest(struct test_bpf_cookie *skel)
+{
+ __u64 cookie;
+ int prog_fd;
+ int fentry_fd = -1, fexit_fd = -1, fmod_ret_fd = -1;
+
+ LIBBPF_OPTS(bpf_test_run_opts, opts, .repeat = 1);
+ LIBBPF_OPTS(bpf_link_create_opts, link_opts);
+
+ skel->bss->fentry_res = 0;
+ skel->bss->fexit_res = 0;
+
+ cookie = 0x100000;
+ prog_fd = bpf_program__fd(skel->progs.fentry_test1);
+ link_opts.tracing.bpf_cookie = cookie;
+ fentry_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_FENTRY, &link_opts);
+
+ cookie = 0x200000;
+ prog_fd = bpf_program__fd(skel->progs.fexit_test1);
+ link_opts.tracing.bpf_cookie = cookie;
+ fexit_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_FEXIT, &link_opts);
+ if (!ASSERT_GE(fexit_fd, 0, "fexit.open"))
+ goto cleanup;
+
+ cookie = 0x300000;
+ prog_fd = bpf_program__fd(skel->progs.fmod_ret_test);
+ link_opts.tracing.bpf_cookie = cookie;
+ fmod_ret_fd = bpf_link_create(prog_fd, 0, BPF_MODIFY_RETURN, &link_opts);
+ if (!ASSERT_GE(fmod_ret_fd, 0, "fmod_ret.opoen"))
+ goto cleanup;
+
+ prog_fd = bpf_program__fd(skel->progs.fentry_test1);
+ bpf_prog_test_run_opts(prog_fd, &opts);
+
+ prog_fd = bpf_program__fd(skel->progs.fmod_ret_test);
+ bpf_prog_test_run_opts(prog_fd, &opts);
+
+ ASSERT_EQ(skel->bss->fentry_res, 0x100000, "fentry_res");
+ ASSERT_EQ(skel->bss->fexit_res, 0x200000, "fexit_res");
+ ASSERT_EQ(skel->bss->fmod_ret_res, 0x300000, "fmod_ret_res");
+
+cleanup:
+ if (fentry_fd >= 0)
+ close(fentry_fd);
+ if (fexit_fd >= 0)
+ close(fexit_fd);
+ if (fmod_ret_fd >= 0)
+ close(fmod_ret_fd);
+}
+
void test_bpf_cookie(void)
{
struct test_bpf_cookie *skel;
@@ -432,6 +482,8 @@ void test_bpf_cookie(void)
tp_subtest(skel);
if (test__start_subtest("perf_event"))
pe_subtest(skel);
+ if (test__start_subtest("trampoline"))
+ tracing_subtest(skel);
test_bpf_cookie__destroy(skel);
}
@@ -14,6 +14,9 @@ int uprobe_res;
int uretprobe_res;
int tp_res;
int pe_res;
+int fentry_res;
+int fexit_res;
+int fmod_ret_res;
static void update(void *ctx, int *res)
{
@@ -82,4 +85,25 @@ int handle_pe(struct pt_regs *ctx)
return 0;
}
+SEC("fentry/bpf_fentry_test1")
+int BPF_PROG(fentry_test1, int a)
+{
+ update(ctx, &fentry_res);
+ return 0;
+}
+
+SEC("fexit/bpf_fentry_test1")
+int BPF_PROG(fexit_test1, int a, int ret)
+{
+ update(ctx, &fexit_res);
+ return 0;
+}
+
+SEC("fmod_ret/bpf_modify_return_test")
+int BPF_PROG(fmod_ret_test, int _a, int *_b, int _ret)
+{
+ update(ctx, &fmod_ret_res);
+ return 1234;
+}
+
char _license[] SEC("license") = "GPL";
Make sure BPF cookies are correct for fentry/fexit/fmod_ret. Signed-off-by: Kui-Feng Lee <kuifeng@fb.com> --- .../selftests/bpf/prog_tests/bpf_cookie.c | 52 +++++++++++++++++++ .../selftests/bpf/progs/test_bpf_cookie.c | 24 +++++++++ 2 files changed, 76 insertions(+)