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-rw-r--r--tools/testing/selftests/bpf/progs/loop1.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/loop1.c b/tools/testing/selftests/bpf/progs/loop1.c
new file mode 100644
index 000000000..50e66772c
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/loop1.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Facebook
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+SEC("raw_tracepoint/kfree_skb")
+int nested_loops(volatile struct pt_regs* ctx)
+{
+ int i, j, sum = 0, m;
+
+ for (j = 0; j < 300; j++)
+ for (i = 0; i < j; i++) {
+ if (j & 1)
+ m = PT_REGS_RC(ctx);
+ else
+ m = j;
+ sum += i * m;
+ }
+
+ return sum;
+}