From: Alexei Starovoitov <ast@xxxxxxxxxx>
Add tests for may_goto instruction via cond_break macro.
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
---
tools/testing/selftests/bpf/DENYLIST.s390x | 1 +
.../bpf/progs/verifier_iterating_callbacks.c | 103 +++++++++++++++++-
2 files changed, 101 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/DENYLIST.s390x b/tools/testing/selftests/bpf/DENYLIST.s390x
index 1a63996c0304..cb810a98e78f 100644
--- a/tools/testing/selftests/bpf/DENYLIST.s390x
+++ b/tools/testing/selftests/bpf/DENYLIST.s390x
@@ -3,3 +3,4 @@
exceptions # JIT does not support calling kfunc bpf_throw (exceptions)
get_stack_raw_tp # user_stack corrupted user stack (no backchain userspace)
stacktrace_build_id # compare_map_keys stackid_hmap vs. stackmap err -2 errno 2 (?)
+verifier_iterating_callbacks
diff --git a/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c b/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c
index 5905e036e0ea..04cdbce4652f 100644
--- a/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c
+++ b/tools/testing/selftests/bpf/progs/verifier_iterating_callbacks.c
@@ -1,8 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/bpf.h>
-#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
+#include "bpf_experimental.h"
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
@@ -239,4 +237,103 @@ int bpf_loop_iter_limit_nested(void *unused)
return 1000 * a + b + c;
}
+#define ARR_SZ 1000000
+int zero;
+char arr[ARR_SZ];
+
+SEC("socket")
+__success __retval(0xd495cdc0)
+int cond_break1(const void *ctx)
+{
+ unsigned long i;
+ unsigned int sum = 0;
+
+ for (i = zero; i < ARR_SZ; cond_break, i++)
+ sum += i;
+ for (i = zero; i < ARR_SZ; i++) {
+ barrier_var(i);
+ sum += i + arr[i];
+ cond_break;
+ }
+
+ return sum;
+}
+
+SEC("socket")
+__success __retval(999000000)
+int cond_break2(const void *ctx)
+{
+ int i, j;
+ int sum = 0;
+
+ for (i = zero; i < 1000; cond_break, i++)
+ for (j = zero; j < 1000; j++) {
+ sum += i + j;
+ cond_break;
+ }
+
+ return sum;
+}
+
+static __noinline int loop(void)
+{
+ int i, sum = 0;
+
+ for (i = zero; i <= 1000000; i++, cond_break)
+ sum += i;
+
+ return sum;
+}
+
+SEC("socket")
+__success __retval(0x6a5a2920)
+int cond_break3(const void *ctx)
+{
+ return loop();
+}
+
+SEC("socket")
+__success __retval(1)
+int cond_break4(const void *ctx)
+{
+ int cnt = zero;
+
+ for (;;) {
+ /* should eventually break out of the loop */
+ cond_break;
+ cnt++;
+ }
+ /* if we looped a bit, it's a success */
+ return cnt > 1 ? 1 : 0;
+}
+
+static __noinline int static_subprog(void)
+{
+ int cnt = zero;
+
+ for (;;) {
+ cond_break;
+ cnt++;
+ }
+
+ return cnt;
+}
+
+SEC("socket")
+__success __retval(1)
+int cond_break5(const void *ctx)
+{
+ int cnt1 = zero, cnt2;
+
+ for (;;) {
+ cond_break;
+ cnt1++;
+ }
+
+ cnt2 = static_subprog();
+
+ /* main and subprog have to loop a bit */
+ return cnt1 > 1 && cnt2 > 1 ? 1 : 0;
+}
+
char _license[] SEC("license") = "GPL";
--
2.43.0
