diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_core_reloc_kernel.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_core_reloc_kernel.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_kernel.c b/tools/testing/selftests/bpf/progs/test_core_reloc_kernel.c index aba928fd60d3..ee4a601dcb06 100644 --- a/tools/testing/selftests/bpf/progs/test_core_reloc_kernel.c +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_kernel.c @@ -3,6 +3,7 @@ #include <linux/bpf.h> #include <stdint.h> +#include <stdbool.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_core_read.h> @@ -11,6 +12,7 @@ char _license[] SEC("license") = "GPL"; struct { char in[256]; char out[256]; + bool skip; uint64_t my_pid_tgid; } data = {}; @@ -19,6 +21,7 @@ struct core_reloc_kernel_output { /* we have test_progs[-flavor], so cut flavor part */ char comm[sizeof("test_progs")]; int comm_len; + bool local_task_struct_matches; }; struct task_struct { @@ -28,15 +31,29 @@ struct task_struct { struct task_struct *group_leader; }; +struct mm_struct___wrong { + int abc_whatever_should_not_exist; +}; + +struct task_struct___local { + int pid; + struct mm_struct___wrong *mm; +}; + #define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src) SEC("raw_tracepoint/sys_enter") int test_core_kernel(void *ctx) { + /* Support for the BPF_TYPE_MATCHES argument to the + * __builtin_preserve_type_info builtin was added at some point during + * development of clang 15 and it's what we require for this test. + */ +#if __has_builtin(__builtin_preserve_type_info) && __clang_major__ >= 15 struct task_struct *task = (void *)bpf_get_current_task(); struct core_reloc_kernel_output *out = (void *)&data.out; uint64_t pid_tgid = bpf_get_current_pid_tgid(); - uint32_t real_tgid = (uint32_t)pid_tgid; + int32_t real_tgid = (int32_t)pid_tgid; int pid, tgid; if (data.my_pid_tgid != pid_tgid) @@ -91,6 +108,10 @@ int test_core_kernel(void *ctx) group_leader, group_leader, group_leader, group_leader, comm); + out->local_task_struct_matches = bpf_core_type_matches(struct task_struct___local); +#else + data.skip = true; +#endif return 0; } |