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      1 /*
      2  * Copyright (C) 2017 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 <cinttypes>
     18 
     19 #include "chre_api/chre.h"
     20 #include "chre/core/event_loop.h"
     21 #include "chre/core/event_loop_manager.h"
     22 #include "chre/platform/assert.h"
     23 #include "chre/platform/log.h"
     24 #include "chre/platform/static_nanoapp_init.h"
     25 #include "chre/util/nanoapp/app_id.h"
     26 #include "chre/util/time.h"
     27 
     28 /**
     29  * @file
     30  * A nanoapp exclusively for testing, which unloads the spammer nanoapp after a
     31  * short delay. Must only be compiled as a static/internal nanoapp.
     32  */
     33 
     34 namespace chre {
     35 namespace {
     36 
     37 constexpr uint32_t kAppVersion = 99;
     38 
     39 void handleUnload(uint16_t /* eventType */, void * /* data */) {
     40   EventLoop& eventLoop = EventLoopManagerSingleton::get()->getEventLoop();
     41   uint32_t instanceId;
     42 
     43   LOGD("About to unload spammer nanoapp");
     44   if (!eventLoop.findNanoappInstanceIdByAppId(kSpammerAppId, &instanceId)) {
     45     LOGE("Couldn't unload nanoapp: not found");
     46   } else if (!eventLoop.unloadNanoapp(instanceId, true)) {
     47     LOGE("Failed to unload nanoapp");
     48   }
     49 }
     50 
     51 bool nanoappStart() {
     52   LOGI("Unload tester started as instance %" PRIu32, chreGetInstanceId());
     53 
     54   constexpr uint64_t kTimerDuration = Seconds(2).toRawNanoseconds();
     55   uint32_t timerHandle = chreTimerSet(kTimerDuration,
     56       nullptr, true /* oneShot */);
     57   CHRE_ASSERT_LOG(timerHandle != CHRE_TIMER_INVALID, "Couldn't start timer!");
     58 
     59   bool eventSent = chreSendEvent(CHRE_EVENT_FIRST_USER_VALUE, nullptr, nullptr,
     60                                  chreGetInstanceId());
     61   CHRE_ASSERT_LOG(eventSent, "Couldn't send event to self!");
     62 
     63   struct chreNanoappInfo info;
     64   bool gotInfo = chreGetNanoappInfoByInstanceId(chreGetInstanceId(), &info);
     65   CHRE_ASSERT(gotInfo);
     66   CHRE_ASSERT(info.appId == chreGetAppId());
     67   CHRE_ASSERT(info.appId == kUnloadTesterAppId);
     68   CHRE_ASSERT(info.version == kAppVersion);
     69   CHRE_ASSERT(info.instanceId == chreGetInstanceId());
     70 
     71   chreConfigureNanoappInfoEvents(true);
     72   return true;
     73 }
     74 
     75 void nanoappHandleEvent(uint32_t senderInstanceId,
     76                         uint16_t eventType,
     77                         const void *eventData) {
     78   if (eventType == CHRE_EVENT_FIRST_USER_VALUE
     79       && senderInstanceId == chreGetInstanceId()) {
     80     struct chreNanoappInfo info;
     81     if (!chreGetNanoappInfoByAppId(kSpammerAppId, &info)) {
     82       LOGW("Couldn't get spammer's app info - not running?");
     83     }
     84   } else if (eventType == CHRE_EVENT_TIMER) {
     85     // We can't do the unload from the context of another nanoapp's handle
     86     // event callback, so get into the system context
     87     if (!EventLoopManagerSingleton::get()->deferCallback(
     88             SystemCallbackType::HandleUnloadNanoapp, nullptr, handleUnload)) {
     89       LOGE("Couldn't defer callback");
     90     }
     91   } else if (eventType == CHRE_EVENT_NANOAPP_STARTED
     92       || eventType == CHRE_EVENT_NANOAPP_STOPPED) {
     93     const auto *info = static_cast<const chreNanoappInfo *>(eventData);
     94     if (info->appId == kSpammerAppId) {
     95       LOGD("Received %s event for spammer instance %" PRIu32,
     96            (eventType == CHRE_EVENT_NANOAPP_STARTED) ? "start" : "stop",
     97            info->instanceId);
     98     }
     99   }
    100 }
    101 
    102 void nanoappEnd() {}
    103 
    104 }  // anonymous namespace
    105 }  // namespace chre
    106 
    107 CHRE_STATIC_NANOAPP_INIT(UnloadTester, chre::kUnloadTesterAppId, kAppVersion);
    108