From: Alexei Starovoitov <ast@xxxxxxxxxx>
Convert test trace_printk to more aggressively validate and use rodata.
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
---
tools/testing/selftests/bpf/prog_tests/trace_printk.c | 3 +++
tools/testing/selftests/bpf/progs/trace_printk.c | 6 +++---
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/trace_printk.c b/tools/testing/selftests/bpf/prog_tests/trace_printk.c
index 39b0decb1bb2..2c641bdf21ca 100644
--- a/tools/testing/selftests/bpf/prog_tests/trace_printk.c
+++ b/tools/testing/selftests/bpf/prog_tests/trace_printk.c
@@ -21,6 +21,9 @@ void test_trace_printk(void)
if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
return;
+ ASSERT_EQ(skel->rodata->fmt[0], 'T', "invalid printk fmt string");
+ skel->rodata->fmt[0] = 't';
+
err = trace_printk__load(skel);
if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err))
goto cleanup;
diff --git a/tools/testing/selftests/bpf/progs/trace_printk.c b/tools/testing/selftests/bpf/progs/trace_printk.c
index 8ca7f399b670..119582aa105a 100644
--- a/tools/testing/selftests/bpf/progs/trace_printk.c
+++ b/tools/testing/selftests/bpf/progs/trace_printk.c
@@ -10,11 +10,11 @@ char _license[] SEC("license") = "GPL";
int trace_printk_ret = 0;
int trace_printk_ran = 0;
-SEC("tp/raw_syscalls/sys_enter")
+const char fmt[] = "Testing,testing %d\n";
+
+SEC("fentry/__x64_sys_nanosleep")
int sys_enter(void *ctx)
{
- static const char fmt[] = "testing,testing %d\n";
-
trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt),
++trace_printk_ran);
return 0;
--
2.30.2
