1 /*
2 * Copyright (C) 2020 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/util/macros.h"
20 #include "chre/util/nanoapp/log.h"
21 #include "chre/util/time.h"
22 #include "chre_api/chre.h"
23
24 #define LOG_TAG "[DebugDumpWorld]"
25
26 /**
27 * A nanoapp that log debug data on receiving CHRE_EVENT_DEBUG_DUMP.
28 */
29
30 #ifdef CHRE_NANOAPP_INTERNAL
31 namespace chre {
32 namespace {
33 #endif // CHRE_NANOAPP_INTERNAL
34
35 namespace {
36
37 uint32_t gEventCount = 0;
38 uint64_t gDwellTimeNs = 0;
39
40 } // namespace
41
nanoappStart()42 bool nanoappStart() {
43 LOGI("Debug dump world start");
44 chreConfigureDebugDumpEvent(true /* enable */);
45 return true;
46 }
47
nanoappEnd()48 void nanoappEnd() {
49 LOGI("Debug dump world end");
50
51 // No need to disable debug dump event delivery since nanoapps can't receive
52 // events after nanoappEnd anyway.
53 }
54
handleDebugDumpEvent()55 void handleDebugDumpEvent() {
56 // CHRE adds the nanoapp name / ID to the debug dump automatically.
57 chreDebugDumpLog(" Debug event count: %" PRIu32 "\n", ++gEventCount);
58 chreDebugDumpLog(" Total dwell time: %" PRIu64 " us\n",
59 gDwellTimeNs / chre::kOneMicrosecondInNanoseconds);
60
61 // Prefer the utility macro if you'll log a float, to suppress double
62 // promotion warnings arising from varargs
63 float floatVal = 1.23f;
64 CHRE_DEBUG_DUMP_LOG(" This is a float: %f", floatVal);
65 }
66
nanoappHandleEvent(uint32_t senderInstanceId,uint16_t eventType,const void * eventData)67 void nanoappHandleEvent(uint32_t senderInstanceId, uint16_t eventType,
68 const void *eventData) {
69 UNUSED_VAR(eventData);
70
71 uint64_t tic = chreGetTime();
72 switch (eventType) {
73 case CHRE_EVENT_DEBUG_DUMP:
74 LOGI("Receiving debug dump event");
75 handleDebugDumpEvent();
76 break;
77 default:
78 LOGW("Unknown event type %" PRIu16 " received from sender %" PRIu32,
79 eventType, senderInstanceId);
80 break;
81 }
82 gDwellTimeNs += chreGetTime() - tic;
83 }
84
85 #ifdef CHRE_NANOAPP_INTERNAL
86 } // anonymous namespace
87 } // namespace chre
88
89 #include "chre/platform/static_nanoapp_init.h"
90 #include "chre/util/nanoapp/app_id.h"
91 #include "chre/util/system/napp_permissions.h"
92
93 CHRE_STATIC_NANOAPP_INIT(DebugDumpWorld, chre::kDebugDumpWorldAppId, 0,
94 chre::NanoappPermissions::CHRE_PERMS_NONE);
95 #endif // CHRE_NANOAPP_INTERNAL
96