commit b9670bb437d493f834c6ba3096946583d2904b72
author Josh Gao <jmgao@google.com> Wed Oct 25 15:12:24 2017 -0700
committer Josh Gao <jmgao@google.com> Thu Oct 26 14:20:16 2017 -0700
tree c3cba9f1e1f440595976843b018d4d1c7cc80c10
parent 3b094c169f0fe1b799114fde35f73f2a064a63d4

libbacktrace: add benchmarks for Backtrace::Create, CreateNew.

Test: backtrace_benchmarks
Change-Id: I80ba5adb31d446314060edd00149f09e14e6815e

libbacktrace/Android.bp

diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index b2c0c0f..ed10183 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -230,5 +230,6 @@
     shared_libs: [
         "libbacktrace",
         "libbase",
+        "libunwindstack",
     ],
 }

libbacktrace/backtrace_benchmarks.cpp

diff --git a/libbacktrace/backtrace_benchmarks.cpp b/libbacktrace/backtrace_benchmarks.cpp
index 9fdf60c..2593e05 100644
--- a/libbacktrace/backtrace_benchmarks.cpp
+++ b/libbacktrace/backtrace_benchmarks.cpp
@@ -32,6 +32,7 @@
 
 #include <backtrace/Backtrace.h>
 #include <backtrace/BacktraceMap.h>
+#include <unwindstack/Memory.h>
 
 // Definitions of prctl arguments to set a vma name in Android kernels.
 #define ANDROID_PR_SET_VMA 0x53564d41
@@ -153,4 +154,26 @@
 }
 BENCHMARK(BM_create_map_new);
 
+
+using BacktraceCreateFn = decltype(Backtrace::Create);
+
+static void CreateBacktrace(benchmark::State& state, BacktraceMap* map, BacktraceCreateFn fn) {
+  while (state.KeepRunning()) {
+    std::unique_ptr<Backtrace> backtrace(fn(getpid(), gettid(), map));
+    backtrace->Unwind(0);
+  }
+}
+
+static void BM_create_backtrace(benchmark::State& state) {
+  std::unique_ptr<BacktraceMap> backtrace_map(BacktraceMap::Create(getpid()));
+  CreateBacktrace(state, backtrace_map.get(), Backtrace::Create);
+}
+BENCHMARK(BM_create_backtrace);
+
+static void BM_create_backtrace_new(benchmark::State& state) {
+  std::unique_ptr<BacktraceMap> backtrace_map(BacktraceMap::CreateNew(getpid()));
+  CreateBacktrace(state, backtrace_map.get(), Backtrace::CreateNew);
+}
+BENCHMARK(BM_create_backtrace_new);
+
 BENCHMARK_MAIN();