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selftests/bpf: Make selftest compilation work on clang 11 

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
This commit is contained in:
Jiri Olsa 2020-12-09 15:29:12 +01:00 committed by Daniel Borkmann
parent 7535a3526d
commit 41003dd024
1 changed files with 8 additions and 0 deletions
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8
tools/testing/selftests/bpf/progs/test_core_reloc_module.c
View File

@ -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;
}