Adding simple ftrace probe test that configures ftrace
probe and verifies the 'ip' argument matches the probed
functions addresses.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
.../selftests/bpf/prog_tests/ftrace_test.c | 48 +++++++++++++++++++
.../testing/selftests/bpf/progs/ftrace_test.c | 17 +++++++
2 files changed, 65 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/ftrace_test.c
create mode 100644 tools/testing/selftests/bpf/progs/ftrace_test.c
diff --git a/tools/testing/selftests/bpf/prog_tests/ftrace_test.c b/tools/testing/selftests/bpf/prog_tests/ftrace_test.c
new file mode 100644
index 000000000000..34d6dbe88251
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/ftrace_test.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+#include "ftrace_test.skel.h"
+
+void test_ftrace_test(void)
+{
+ struct ftrace_test *ftrace_skel = NULL;
+ __u32 duration = 0, retval;
+ int err, prog_fd;
+ __u64 *ips;
+ int idx, i;
+
+ ftrace_skel = ftrace_test__open_and_load();
+ if (!ASSERT_OK_PTR(ftrace_skel, "ftrace_skel_load"))
+ goto cleanup;
+
+ err = ftrace_test__attach(ftrace_skel);
+ if (!ASSERT_OK(err, "ftrace_attach"))
+ goto cleanup;
+
+ prog_fd = bpf_program__fd(ftrace_skel->progs.test);
+ err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
+ NULL, NULL, &retval, &duration);
+ ASSERT_OK(err || retval, "test_run");
+
+ ips = ftrace_skel->bss->ips;
+ idx = ftrace_skel->bss->idx;
+
+ if (!ASSERT_EQ(idx, 8, "idx"))
+ goto cleanup;
+
+ for (i = 0; i < 8; i++) {
+ unsigned long long addr;
+ char func[50];
+
+ snprintf(func, sizeof(func), "bpf_fentry_test%d", i + 1);
+
+ err = kallsyms_find(func, &addr);
+ if (!ASSERT_OK(err, "kallsyms_find"))
+ goto cleanup;
+
+ if (!ASSERT_EQ(ips[i], addr, "ips_addr"))
+ goto cleanup;
+ }
+
+cleanup:
+ ftrace_test__destroy(ftrace_skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/ftrace_test.c b/tools/testing/selftests/bpf/progs/ftrace_test.c
new file mode 100644
index 000000000000..b2a55aa10318
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/ftrace_test.c
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+__u64 ips[9] = { };
+unsigned int idx = 0;
+
+SEC("fentry.ftrace/bpf_fentry_test*")
+int BPF_PROG(test, __u64 ip, __u64 parent_ip)
+{
+ if (idx >= 0 && idx < 8)
+ ips[idx++] = ip;
+ return 0;
+}
--
2.30.2
