Home | History | Annotate | Download | only in jni 
      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <log/log_id.h>
     18 #include <private/android_logger.h>
     19 
     20 #include <nativehelper/JNIHelp.h>
     21 #include "jni.h"
     22 
     23 #include "core_jni_helpers.h"
     24 #include "eventlog_helper.h"
     25 
     26 namespace android {
     27 
     28 constexpr char kSecurityLogEventClass[] = "android/app/admin/SecurityLog$SecurityEvent";
     29 template class EventLogHelper<log_id_t::LOG_ID_SECURITY, kSecurityLogEventClass>;
     30 using SLog = EventLogHelper<log_id_t::LOG_ID_SECURITY, kSecurityLogEventClass>;
     31 
     32 static jboolean android_app_admin_SecurityLog_isLoggingEnabled(JNIEnv* env,
     33                                                     jobject /* clazz */) {
     34     return (bool)__android_log_security();
     35 }
     36 
     37 static void android_app_admin_SecurityLog_readEvents(JNIEnv* env, jobject /* clazz */,
     38                                              jobject out) {
     39 
     40     if (out == NULL) {
     41         jniThrowNullPointerException(env, NULL);
     42         return;
     43     }
     44     SLog::readEvents(env, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, 0, out);
     45 }
     46 
     47 static void android_app_admin_SecurityLog_readEventsSince(JNIEnv* env, jobject /* clazz */,
     48                                              jlong timestamp,
     49                                              jobject out) {
     50 
     51     if (out == NULL) {
     52         jniThrowNullPointerException(env, NULL);
     53         return;
     54     }
     55     SLog::readEvents(env, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK, timestamp, out);
     56 }
     57 
     58 static void android_app_admin_SecurityLog_readPreviousEvents(JNIEnv* env, jobject /* clazz */,
     59                                              jobject out) {
     60 
     61     if (out == NULL) {
     62         jniThrowNullPointerException(env, NULL);
     63         return;
     64     }
     65     SLog::readEvents(env, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK | ANDROID_LOG_PSTORE, 0, out);
     66 }
     67 
     68 static void android_app_admin_SecurityLog_readEventsOnWrapping(JNIEnv* env, jobject /* clazz */,
     69                                              jlong timestamp,
     70                                              jobject out) {
     71     if (out == NULL) {
     72         jniThrowNullPointerException(env, NULL);
     73         return;
     74     }
     75     SLog::readEvents(env, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK | ANDROID_LOG_WRAP, timestamp,
     76             out);
     77 }
     78 
     79 /*
     80  * JNI registration.
     81  */
     82 static const JNINativeMethod gRegisterMethods[] = {
     83     /* name, signature, funcPtr */
     84     { "isLoggingEnabled",
     85       "()Z",
     86       (void*) android_app_admin_SecurityLog_isLoggingEnabled
     87     },
     88     { "writeEvent",
     89       "(ILjava/lang/String;)I",
     90       (void*) SLog::writeEventString
     91     },
     92     { "writeEvent",
     93       "(I[Ljava/lang/Object;)I",
     94       (void*) SLog::writeEventArray
     95     },
     96     { "readEvents",
     97       "(Ljava/util/Collection;)V",
     98       (void*) android_app_admin_SecurityLog_readEvents
     99     },
    100     { "readEventsSince",
    101       "(JLjava/util/Collection;)V",
    102       (void*) android_app_admin_SecurityLog_readEventsSince
    103     },
    104     { "readPreviousEvents",
    105       "(Ljava/util/Collection;)V",
    106       (void*) android_app_admin_SecurityLog_readPreviousEvents
    107     },
    108     { "readEventsOnWrapping",
    109       "(JLjava/util/Collection;)V",
    110       (void*) android_app_admin_SecurityLog_readEventsOnWrapping
    111     },
    112 };
    113 
    114 int register_android_app_admin_SecurityLog(JNIEnv* env) {
    115     SLog::Init(env);
    116 
    117     return RegisterMethodsOrDie(
    118             env,
    119             "android/app/admin/SecurityLog",
    120             gRegisterMethods, NELEM(gRegisterMethods));
    121 }
    122 
    123 }; // namespace android
    124