diff options
| -rw-r--r-- | tools/testing/selftests/bpf/README.rst | 14 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/btf_tag.c | 6 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/tag.c | 12 |
3 files changed, 31 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/README.rst b/tools/testing/selftests/bpf/README.rst index 9b17f2867488..8200c0da2769 100644 --- a/tools/testing/selftests/bpf/README.rst +++ b/tools/testing/selftests/bpf/README.rst @@ -201,6 +201,20 @@ Without it, the error from compiling bpf selftests looks like: __ https://reviews.llvm.org/D93563 +btf_tag test and Clang version +============================== + +The btf_tag selftest require LLVM support to recognize the btf_tag attribute. +It was introduced in `Clang 14`__. + +Without it, the btf_tag selftest will be skipped and you will observe: + +.. code-block:: console + + #<test_num> btf_tag:SKIP + +__ https://reviews.llvm.org/D106614 + Clang dependencies for static linking tests =========================================== diff --git a/tools/testing/selftests/bpf/prog_tests/btf_tag.c b/tools/testing/selftests/bpf/prog_tests/btf_tag.c index f939527ede77..91821f42714d 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf_tag.c +++ b/tools/testing/selftests/bpf/prog_tests/btf_tag.c @@ -10,5 +10,11 @@ void test_btf_tag(void) skel = tag__open_and_load(); if (!ASSERT_OK_PTR(skel, "btf_tag")) return; + + if (skel->rodata->skip_tests) { + printf("%s:SKIP: btf_tag attribute not supported", __func__); + test__skip(); + } + tag__destroy(skel); } diff --git a/tools/testing/selftests/bpf/progs/tag.c b/tools/testing/selftests/bpf/progs/tag.c index 17f88c58a6c5..b46b1bfac7da 100644 --- a/tools/testing/selftests/bpf/progs/tag.c +++ b/tools/testing/selftests/bpf/progs/tag.c @@ -4,8 +4,19 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#if __has_attribute(btf_tag) #define __tag1 __attribute__((btf_tag("tag1"))) #define __tag2 __attribute__((btf_tag("tag2"))) +volatile const bool skip_tests __tag1 __tag2 = false; +#else +#define __tag1 +#define __tag2 +volatile const bool skip_tests = true; +#endif struct key_t { int a; @@ -20,7 +31,6 @@ struct { __type(value, __u64); } hashmap1 SEC(".maps"); -__u32 total __tag1 __tag2 = 0; static __noinline int foo(int x __tag1 __tag2) __tag1 __tag2 { |