1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <android-base/strings.h>
18 #include <benchmark/benchmark.h>
19 #include <dlfcn.h>
20 
21 #include "util.h"
22 
local_function()23 void local_function() {}
24 
25 template<typename F>
bm_dladdr(F fun)26 int bm_dladdr(F fun) {
27     const void* addr = reinterpret_cast<void*>(fun);
28     Dl_info info;
29     int res = dladdr(addr, &info);
30     if (res == 0) abort();
31     if (info.dli_fname == nullptr) abort();
32 
33     // needed for DoNotOptimize
34     return res;
35 }
36 BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_libc_printf, bm_dladdr(printf));
37 BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_libdl_dladdr, bm_dladdr(dladdr));
38 BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_local_function, bm_dladdr(local_function));
39 BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_libbase_split, bm_dladdr(android::base::Split));
40