diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/fill_link_info.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/fill_link_info.c | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c index f3932941bbaa..e40114620751 100644 --- a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c +++ b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c @@ -37,6 +37,7 @@ static noinline void uprobe_func(void) static int verify_perf_link_info(int fd, enum bpf_perf_event_type type, long addr, ssize_t offset, ssize_t entry_offset) { + ssize_t ref_ctr_offset = entry_offset /* ref_ctr_offset for uprobes */; struct bpf_link_info info; __u32 len = sizeof(info); char buf[PATH_MAX]; @@ -67,8 +68,9 @@ again: ASSERT_EQ(info.perf_event.kprobe.cookie, PERF_EVENT_COOKIE, "kprobe_cookie"); + ASSERT_EQ(info.perf_event.kprobe.name_len, strlen(KPROBE_FUNC) + 1, + "name_len"); if (!info.perf_event.kprobe.func_name) { - ASSERT_EQ(info.perf_event.kprobe.name_len, 0, "name_len"); info.perf_event.kprobe.func_name = ptr_to_u64(&buf); info.perf_event.kprobe.name_len = sizeof(buf); goto again; @@ -79,8 +81,9 @@ again: ASSERT_EQ(err, 0, "cmp_kprobe_func_name"); break; case BPF_PERF_EVENT_TRACEPOINT: + ASSERT_EQ(info.perf_event.tracepoint.name_len, strlen(TP_NAME) + 1, + "name_len"); if (!info.perf_event.tracepoint.tp_name) { - ASSERT_EQ(info.perf_event.tracepoint.name_len, 0, "name_len"); info.perf_event.tracepoint.tp_name = ptr_to_u64(&buf); info.perf_event.tracepoint.name_len = sizeof(buf); goto again; @@ -95,9 +98,11 @@ again: case BPF_PERF_EVENT_UPROBE: case BPF_PERF_EVENT_URETPROBE: ASSERT_EQ(info.perf_event.uprobe.offset, offset, "uprobe_offset"); + ASSERT_EQ(info.perf_event.uprobe.ref_ctr_offset, ref_ctr_offset, "uprobe_ref_ctr_offset"); + ASSERT_EQ(info.perf_event.uprobe.name_len, strlen(UPROBE_FILE) + 1, + "name_len"); if (!info.perf_event.uprobe.file_name) { - ASSERT_EQ(info.perf_event.uprobe.name_len, 0, "name_len"); info.perf_event.uprobe.file_name = ptr_to_u64(&buf); info.perf_event.uprobe.name_len = sizeof(buf); goto again; @@ -168,6 +173,10 @@ static void test_kprobe_fill_link_info(struct test_fill_link_info *skel, /* See also arch_adjust_kprobe_addr(). */ if (skel->kconfig->CONFIG_X86_KERNEL_IBT) entry_offset = 4; + if (skel->kconfig->CONFIG_PPC64 && + skel->kconfig->CONFIG_KPROBES_ON_FTRACE && + !skel->kconfig->CONFIG_PPC_FTRACE_OUT_OF_LINE) + entry_offset = 4; err = verify_perf_link_info(link_fd, type, kprobe_addr, 0, entry_offset); ASSERT_OK(err, "verify_perf_link_info"); } else { @@ -234,20 +243,32 @@ static void test_uprobe_fill_link_info(struct test_fill_link_info *skel, .retprobe = type == BPF_PERF_EVENT_URETPROBE, .bpf_cookie = PERF_EVENT_COOKIE, ); + const char *sema[1] = { + "uprobe_link_info_sema_1", + }; + __u64 *ref_ctr_offset; struct bpf_link *link; int link_fd, err; + err = elf_resolve_syms_offsets("/proc/self/exe", 1, sema, + (unsigned long **) &ref_ctr_offset, STT_OBJECT); + if (!ASSERT_OK(err, "elf_resolve_syms_offsets_object")) + return; + + opts.ref_ctr_offset = *ref_ctr_offset; link = bpf_program__attach_uprobe_opts(skel->progs.uprobe_run, 0, /* self pid */ UPROBE_FILE, uprobe_offset, &opts); if (!ASSERT_OK_PTR(link, "attach_uprobe")) - return; + goto out; link_fd = bpf_link__fd(link); - err = verify_perf_link_info(link_fd, type, 0, uprobe_offset, 0); + err = verify_perf_link_info(link_fd, type, 0, uprobe_offset, *ref_ctr_offset); ASSERT_OK(err, "verify_perf_link_info"); bpf_link__destroy(link); +out: + free(ref_ctr_offset); } static int verify_kmulti_link_info(int fd, bool retprobe, bool has_cookies) @@ -417,6 +438,15 @@ verify_umulti_link_info(int fd, bool retprobe, __u64 *offsets, if (!ASSERT_NEQ(err, -1, "readlink")) return -1; + memset(&info, 0, sizeof(info)); + err = bpf_link_get_info_by_fd(fd, &info, &len); + if (!ASSERT_OK(err, "bpf_link_get_info_by_fd")) + return -1; + + ASSERT_EQ(info.uprobe_multi.count, 3, "info.uprobe_multi.count"); + ASSERT_EQ(info.uprobe_multi.path_size, strlen(path) + 1, + "info.uprobe_multi.path_size"); + for (bit = 0; bit < 8; bit++) { memset(&info, 0, sizeof(info)); info.uprobe_multi.path = ptr_to_u64(path_buf); |