From 360301a6c21be87fe881546bd5f22eccf7a165c5 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 9 Jan 2020 22:41:24 -0800 Subject: selftests/bpf: Add unit tests for global functions test_global_func[12] - check 512 stack limit. test_global_func[34] - check 8 frame call chain limit. test_global_func5 - check that non-ctx pointer cannot be passed into a function that expects context. test_global_func6 - check that ctx pointer is unmodified. test_global_func7 - check that global function returns scalar. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20200110064124.1760511-7-ast@kernel.org --- .../selftests/bpf/progs/test_global_func5.c | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/test_global_func5.c (limited to 'tools/testing/selftests/bpf/progs/test_global_func5.c') diff --git a/tools/testing/selftests/bpf/progs/test_global_func5.c b/tools/testing/selftests/bpf/progs/test_global_func5.c new file mode 100644 index 000000000000..86787c03cea8 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_global_func5.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2020 Facebook */ +#include +#include +#include "bpf_helpers.h" + +__attribute__ ((noinline)) +int f1(struct __sk_buff *skb) +{ + return skb->len; +} + +int f3(int, struct __sk_buff *skb); + +__attribute__ ((noinline)) +int f2(int val, struct __sk_buff *skb) +{ + return f1(skb) + f3(val, (void *)&val); /* type mismatch */ +} + +__attribute__ ((noinline)) +int f3(int val, struct __sk_buff *skb) +{ + return skb->ifindex * val; +} + +SEC("classifier/test") +int test_cls(struct __sk_buff *skb) +{ + return f1(skb) + f2(2, skb) + f3(3, skb); +} -- cgit