Add dladdr benchmark.
Bug: 142684469
Test: adb shell /data/benchmarktest64/bionic-benchmarks/bionic-benchmarks --benchmark_filter="BM_dladdr.*"
-------------------------------------------------------------------
Benchmark Time CPU Iterations
-------------------------------------------------------------------
BM_dladdr_libbase_split 92.6 ns 92.4 ns 6673841
BM_dladdr_libc_printf 8690 ns 8667 ns 80916
BM_dladdr_libdl_dladdr 133 ns 132 ns 5342791
BM_dladdr_local_function 93.0 ns 92.7 ns 7625562
Change-Id: I259dd8f64ccc288835576a2eb08b8b8132777a4b
diff --git a/benchmarks/Android.bp b/benchmarks/Android.bp
index 70f7bab..a7be965 100644
--- a/benchmarks/Android.bp
+++ b/benchmarks/Android.bp
@@ -29,6 +29,7 @@
"bionic_benchmarks.cpp",
"atomic_benchmark.cpp",
"ctype_benchmark.cpp",
+ "dlfcn_benchmark.cpp",
"get_heap_size_benchmark.cpp",
"inttypes_benchmark.cpp",
"malloc_benchmark.cpp",
diff --git a/benchmarks/dlfcn_benchmark.cpp b/benchmarks/dlfcn_benchmark.cpp
new file mode 100644
index 0000000..6a2bb57
--- /dev/null
+++ b/benchmarks/dlfcn_benchmark.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/strings.h>
+#include <benchmark/benchmark.h>
+#include <dlfcn.h>
+
+#include "util.h"
+
+void local_function() {}
+
+template<typename F>
+int bm_dladdr(F fun) {
+ const void* addr = reinterpret_cast<void*>(fun);
+ Dl_info info;
+ int res = dladdr(addr, &info);
+ if (res == 0) abort();
+ if (info.dli_fname == nullptr) abort();
+
+ // needed for DoNotOptimize
+ return res;
+}
+BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_libc_printf, bm_dladdr(printf));
+BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_libdl_dladdr, bm_dladdr(dladdr));
+BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_local_function, bm_dladdr(local_function));
+BIONIC_TRIVIAL_BENCHMARK(BM_dladdr_libbase_split, bm_dladdr(android::base::Split));