142 lines
4.4 KiB
C++
142 lines
4.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "base/android/jni_android.h"
|
|
|
|
#include "base/at_exit.h"
|
|
#include "base/logging.h"
|
|
#include "testing/gtest/include/gtest/gtest.h"
|
|
|
|
namespace base {
|
|
namespace android {
|
|
|
|
namespace {
|
|
|
|
const char kJavaLangObject[] = "java/lang/Object";
|
|
const char kGetClass[] = "getClass";
|
|
const char kToString[] = "toString";
|
|
const char kReturningJavaLangClass[] = "()Ljava/lang/Class;";
|
|
const char kReturningJavaLangString[] = "()Ljava/lang/String;";
|
|
|
|
const char* g_last_method;
|
|
const char* g_last_jni_signature;
|
|
jmethodID g_last_method_id;
|
|
|
|
const JNINativeInterface* g_previous_functions;
|
|
|
|
jmethodID GetMethodIDWrapper(JNIEnv* env, jclass clazz, const char* method,
|
|
const char* jni_signature) {
|
|
g_last_method = method;
|
|
g_last_jni_signature = jni_signature;
|
|
g_last_method_id = g_previous_functions->GetMethodID(env, clazz, method,
|
|
jni_signature);
|
|
return g_last_method_id;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
class JNIAndroidTest : public testing::Test {
|
|
protected:
|
|
virtual void SetUp() {
|
|
JNIEnv* env = AttachCurrentThread();
|
|
g_previous_functions = env->functions;
|
|
hooked_functions = *g_previous_functions;
|
|
env->functions = &hooked_functions;
|
|
hooked_functions.GetMethodID = &GetMethodIDWrapper;
|
|
}
|
|
|
|
virtual void TearDown() {
|
|
JNIEnv* env = AttachCurrentThread();
|
|
env->functions = g_previous_functions;
|
|
Reset();
|
|
}
|
|
|
|
void Reset() {
|
|
g_last_method = 0;
|
|
g_last_jni_signature = 0;
|
|
g_last_method_id = NULL;
|
|
}
|
|
// Needed to cleanup the cached method map in the implementation between
|
|
// runs (e.g. if using --gtest_repeat)
|
|
base::ShadowingAtExitManager exit_manager;
|
|
// From JellyBean release, the instance of this struct provided in JNIEnv is
|
|
// read-only, so we deep copy it to allow individual functions to be hooked.
|
|
JNINativeInterface hooked_functions;
|
|
};
|
|
|
|
TEST_F(JNIAndroidTest, GetMethodIDFromClassNameCaching) {
|
|
JNIEnv* env = AttachCurrentThread();
|
|
|
|
Reset();
|
|
jmethodID id1 = GetMethodIDFromClassName(env, kJavaLangObject, kGetClass,
|
|
kReturningJavaLangClass);
|
|
EXPECT_STREQ(kGetClass, g_last_method);
|
|
EXPECT_STREQ(kReturningJavaLangClass, g_last_jni_signature);
|
|
EXPECT_EQ(g_last_method_id, id1);
|
|
|
|
Reset();
|
|
jmethodID id2 = GetMethodIDFromClassName(env, kJavaLangObject, kGetClass,
|
|
kReturningJavaLangClass);
|
|
EXPECT_STREQ(0, g_last_method);
|
|
EXPECT_STREQ(0, g_last_jni_signature);
|
|
EXPECT_EQ(NULL, g_last_method_id);
|
|
EXPECT_EQ(id1, id2);
|
|
|
|
Reset();
|
|
jmethodID id3 = GetMethodIDFromClassName(env, kJavaLangObject, kToString,
|
|
kReturningJavaLangString);
|
|
EXPECT_STREQ(kToString, g_last_method);
|
|
EXPECT_STREQ(kReturningJavaLangString, g_last_jni_signature);
|
|
EXPECT_EQ(g_last_method_id, id3);
|
|
}
|
|
|
|
namespace {
|
|
|
|
base::subtle::AtomicWord g_atomic_id = 0;
|
|
int LazyMethodIDCall(JNIEnv* env, jclass clazz, int p) {
|
|
jmethodID id = base::android::MethodID::LazyGet<
|
|
base::android::MethodID::TYPE_STATIC>(
|
|
env, clazz,
|
|
"abs",
|
|
"(I)I",
|
|
&g_atomic_id);
|
|
|
|
return env->CallStaticIntMethod(clazz, id, p);
|
|
}
|
|
|
|
int MethodIDCall(JNIEnv* env, jclass clazz, jmethodID id, int p) {
|
|
return env->CallStaticIntMethod(clazz, id, p);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
TEST(JNIAndroidMicrobenchmark, MethodId) {
|
|
JNIEnv* env = AttachCurrentThread();
|
|
ScopedJavaLocalRef<jclass> clazz(GetClass(env, "java/lang/Math"));
|
|
base::Time start_lazy = base::Time::Now();
|
|
int o = 0;
|
|
for (int i = 0; i < 1024; ++i)
|
|
o += LazyMethodIDCall(env, clazz.obj(), i);
|
|
base::Time end_lazy = base::Time::Now();
|
|
|
|
jmethodID id = reinterpret_cast<jmethodID>(g_atomic_id);
|
|
base::Time start = base::Time::Now();
|
|
for (int i = 0; i < 1024; ++i)
|
|
o += MethodIDCall(env, clazz.obj(), id, i);
|
|
base::Time end = base::Time::Now();
|
|
|
|
// On a Galaxy Nexus, results were in the range of:
|
|
// JNI LazyMethodIDCall (us) 1984
|
|
// JNI MethodIDCall (us) 1861
|
|
LOG(ERROR) << "JNI LazyMethodIDCall (us) " <<
|
|
base::TimeDelta(end_lazy - start_lazy).InMicroseconds();
|
|
LOG(ERROR) << "JNI MethodIDCall (us) " <<
|
|
base::TimeDelta(end - start).InMicroseconds();
|
|
LOG(ERROR) << "JNI " << o;
|
|
}
|
|
|
|
|
|
} // namespace android
|
|
} // namespace base
|