diff options
| -rw-r--r-- | tools/perf/tests/sigtrap.c | 60 |
1 files changed, 40 insertions, 20 deletions
diff --git a/tools/perf/tests/sigtrap.c b/tools/perf/tests/sigtrap.c index 1de7478ec189..a1bc7c776254 100644 --- a/tools/perf/tests/sigtrap.c +++ b/tools/perf/tests/sigtrap.c @@ -57,36 +57,51 @@ static struct perf_event_attr make_event_attr(void) #ifdef HAVE_BPF_SKEL #include <bpf/btf.h> -static bool attr_has_sigtrap(void) +static struct btf *btf; + +static bool btf__available(void) { - bool ret = false; - struct btf *btf; - const struct btf_type *t; + if (btf == NULL) + btf = btf__load_vmlinux_btf(); + + return btf != NULL; +} + +static void btf__exit(void) +{ + btf__free(btf); + btf = NULL; +} + +static const struct btf_member *__btf_type__find_member_by_name(int type_id, const char *member_name) +{ + const struct btf_type *t = btf__type_by_id(btf, type_id); const struct btf_member *m; - const char *name; - int i, id; + int i; + + for (i = 0, m = btf_members(t); i < btf_vlen(t); i++, m++) { + const char *current_member_name = btf__name_by_offset(btf, m->name_off); + if (!strcmp(current_member_name, member_name)) + return m; + } + + return NULL; +} + +static bool attr_has_sigtrap(void) +{ + int id; - btf = btf__load_vmlinux_btf(); - if (btf == NULL) { + if (!btf__available()) { /* should be an old kernel */ return false; } id = btf__find_by_name_kind(btf, "perf_event_attr", BTF_KIND_STRUCT); if (id < 0) - goto out; + return false; - t = btf__type_by_id(btf, id); - for (i = 0, m = btf_members(t); i < btf_vlen(t); i++, m++) { - name = btf__name_by_offset(btf, m->name_off); - if (!strcmp(name, "sigtrap")) { - ret = true; - break; - } - } -out: - btf__free(btf); - return ret; + return __btf_type__find_member_by_name(id, "sigtrap") != NULL; } #else /* !HAVE_BPF_SKEL */ static bool attr_has_sigtrap(void) @@ -109,6 +124,10 @@ static bool attr_has_sigtrap(void) return ret; } + +static void btf__exit(void) +{ +} #endif /* HAVE_BPF_SKEL */ static void @@ -221,6 +240,7 @@ out_restore_sigaction: sigaction(SIGTRAP, &oldact, NULL); out: pthread_barrier_destroy(&barrier); + btf__exit(); return ret; } |