selftests/bpf: Make selftest compilation work on clang 11 (41003dd0) · Commits · 戴 / test

We can't compile test_core_reloc_module.c selftest with clang 11, compile fails with: CLNG-LLC [test_maps] test_core_reloc_module.o progs/test_core_reloc_module.c:57:21: error: use of unknown builtin \ '__builtin_preserve_type_info' [-Wimplicit-function-declaration] out->read_ctx_sz = bpf_core_type_size(struct bpf_testmod_test_read_ctx); Skipping these tests if __builtin_preserve_type_info() is not supported by compiler. Signed-off-by:

Jiri Olsa <jolsa@kernel.org> Signed-off-by:

Daniel Borkmann <daniel@iogearbox.net> Acked-by:

Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201209142912.99145-1-jolsa@kernel.org

tools/testing/selftests/bpf/progs/test_core_reloc_module.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -40,6 +40,7 @@ int BPF_PROG(test_core_module_probed,
		struct task_struct *task,
		struct bpf_testmod_test_read_ctx *read_ctx)
		{
		#if __has_builtin(__builtin_preserve_enum_value)
		struct core_reloc_module_output out = (void )&data.out;
		__u64 pid_tgid = bpf_get_current_pid_tgid();
		__u32 real_tgid = (__u32)(pid_tgid >> 32);
		@@ -61,6 +62,9 @@ int BPF_PROG(test_core_module_probed,
		out->len_exists = bpf_core_field_exists(read_ctx->len);

		out->comm_len = BPF_CORE_READ_STR_INTO(&out->comm, task, comm);
		#else
		data.skip = true;
		#endif

		return 0;
		}
		@@ -70,6 +74,7 @@ int BPF_PROG(test_core_module_direct,
		struct task_struct *task,
		struct bpf_testmod_test_read_ctx *read_ctx)
		{
		#if __has_builtin(__builtin_preserve_enum_value)
		struct core_reloc_module_output out = (void )&data.out;
		__u64 pid_tgid = bpf_get_current_pid_tgid();
		__u32 real_tgid = (__u32)(pid_tgid >> 32);
		@@ -91,6 +96,9 @@ int BPF_PROG(test_core_module_direct,
		out->len_exists = bpf_core_field_exists(read_ctx->len);

		out->comm_len = BPF_CORE_READ_STR_INTO(&out->comm, task, comm);
		#else
		data.skip = true;
		#endif

		return 0;
		}

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