91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_NAMESPACE "StatsLog.tag."
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#define LOG_TAG "StatsLog_println"
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#include <jni.h>
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#include <log/log.h>
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#include <nativehelper/scoped_local_ref.h>
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#include "stats_buffer_writer.h"
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namespace android {
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static void android_util_StatsLog_write(JNIEnv* env, jobject clazz, jbyteArray buf, jint size,
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jint atomId) {
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if (buf == NULL) {
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return;
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}
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jint actualSize = env->GetArrayLength(buf);
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if (actualSize < size) {
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return;
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}
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jbyte* bufferArray = env->GetByteArrayElements(buf, NULL);
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if (bufferArray == NULL) {
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return;
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}
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write_buffer_to_statsd((void*) bufferArray, size, atomId);
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env->ReleaseByteArrayElements(buf, bufferArray, 0);
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}
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/*
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* JNI registration.
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*/
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static const JNINativeMethod gMethods[] = {
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/* name, signature, funcPtr */
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{ "writeImpl", "([BII)V", (void*) android_util_StatsLog_write },
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};
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int register_android_util_StatsLog(JNIEnv* env)
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{
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static const char* kStatsLogClass = "android/util/StatsLog";
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ScopedLocalRef<jclass> cls(env, env->FindClass(kStatsLogClass));
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if (cls.get() == nullptr) {
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ALOGE("jni statsd registration failure, class not found '%s'", kStatsLogClass);
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return JNI_ERR;
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}
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const jint count = sizeof(gMethods) / sizeof(gMethods[0]);
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int status = env->RegisterNatives(cls.get(), gMethods, count);
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if (status < 0) {
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ALOGE("jni statsd registration failure, status: %d", status);
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return JNI_ERR;
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}
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return JNI_VERSION_1_4;
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}
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}; // namespace android
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/*
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* JNI Initialization
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*/
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jint JNI_OnLoad(JavaVM* jvm, void* reserved) {
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JNIEnv* e;
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ALOGV("statsd : loading JNI\n");
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// Check JNI version
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if (jvm->GetEnv((void**)&e, JNI_VERSION_1_4)) {
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ALOGE("JNI version mismatch error");
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return JNI_ERR;
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}
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return android::register_android_util_StatsLog(e);
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}
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