1 files changed, 90 insertions, 0 deletions
diff --git a/apex/statsd/jni/android_util_StatsLog.cpp b/apex/statsd/jni/android_util_StatsLog.cpp
new file mode 100644
index 000000000000..71ce94923c8d
--- /dev/null
+++ b/apex/statsd/jni/android_util_StatsLog.cpp
@@ -0,0 +1,90 @@
+/*
+ * 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.
+ */
+
+#define LOG_NAMESPACE "StatsLog.tag."
+#define LOG_TAG "StatsLog_println"
+
+#include <jni.h>
+#include <log/log.h>
+#include <nativehelper/scoped_local_ref.h>
+#include "stats_buffer_writer.h"
+
+namespace android {
+
+static void android_util_StatsLog_write(JNIEnv* env, jobject clazz, jbyteArray buf, jint size,
+        jint atomId) {
+    if (buf == NULL) {
+        return;
+    }
+    jint actualSize = env->GetArrayLength(buf);
+    if (actualSize < size) {
+        return;
+    }
+
+    jbyte* bufferArray = env->GetByteArrayElements(buf, NULL);
+    if (bufferArray == NULL) {
+        return;
+    }
+
+    write_buffer_to_statsd((void*) bufferArray, size, atomId);
+
+    env->ReleaseByteArrayElements(buf, bufferArray, 0);
+}
+
+/*
+ * JNI registration.
+ */
+static const JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    { "writeImpl", "([BII)V", (void*) android_util_StatsLog_write },
+};
+
+int register_android_util_StatsLog(JNIEnv* env)
+{
+    static const char* kStatsLogClass = "android/util/StatsLog";
+
+    ScopedLocalRef<jclass> cls(env, env->FindClass(kStatsLogClass));
+    if (cls.get() == nullptr) {
+        ALOGE("jni statsd registration failure, class not found '%s'", kStatsLogClass);
+        return JNI_ERR;
+    }
+
+    const jint count = sizeof(gMethods) / sizeof(gMethods[0]);
+    int status = env->RegisterNatives(cls.get(), gMethods, count);
+    if (status < 0) {
+        ALOGE("jni statsd registration failure, status: %d", status);
+        return JNI_ERR;
+    }
+    return JNI_VERSION_1_4;
+}
+
+}; // namespace android
+
+/*
+ * JNI Initialization
+ */
+jint JNI_OnLoad(JavaVM* jvm, void* reserved) {
+    JNIEnv* e;
+
+    ALOGV("statsd : loading JNI\n");
+    // Check JNI version
+    if (jvm->GetEnv((void**)&e, JNI_VERSION_1_4)) {
+        ALOGE("JNI version mismatch error");
+        return JNI_ERR;
+    }
+
+    return android::register_android_util_StatsLog(e);
+}