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 <general_test/get_time_test.h>
18
19 #include <cstddef>
20
21 #include <shared/abort.h>
22 #include <shared/nano_endian.h>
23 #include <shared/send_message.h>
24
25 #include <chre.h>
26
27 using nanoapp_testing::MessageType;
28 using nanoapp_testing::sendFatalFailureToHost;
29
30 namespace general_test {
31
GetTimeTest()32 GetTimeTest::GetTimeTest()
33 : Test(CHRE_API_VERSION_1_0), mContinueCount(0) {
34 }
35
setUp(uint32_t messageSize,const void *)36 void GetTimeTest::setUp(uint32_t messageSize, const void * /* message */) {
37 if (messageSize != 0) {
38 sendFatalFailureToHost(
39 "GetTime message expects 0 additional bytes, got ",
40 &messageSize);
41 }
42
43 uint64_t firstTime = chreGetTime();
44 if (firstTime == UINT64_C(0)) {
45 sendFatalFailureToHost("chreGetTime() gave 0 well after system boot.");
46 }
47
48 uint64_t prevTime = firstTime;
49
50 // Continuously call chreGetTime() to ensure timestamps are monotonically
51 // increasing and increases at some point after a large number of calls.
52 constexpr size_t kMaxGetTimeCount = 10000;
53 for (size_t i = 0; (prevTime == firstTime && i < kMaxGetTimeCount); i++) {
54 uint64_t nextTime = chreGetTime();
55
56 // We don't require this to have increased, because maybe we're
57 // on a relatively fast processor, or have a low resolution clock.
58 if (nextTime < prevTime) {
59 sendFatalFailureToHost(
60 "chreGetTime() is not monotonically increasing");
61 }
62
63 prevTime = nextTime;
64 }
65
66 if (prevTime == firstTime) {
67 sendFatalFailureToHost(
68 "chreGetTime() is not increasing after a large number of calls");
69 }
70
71 prevTime = nanoapp_testing::hostToLittleEndian(prevTime);
72 sendMessageToHost(MessageType::kContinue, &prevTime, sizeof(prevTime));
73
74 // Now we'll wait to get a 'continue' from the host.
75 }
76
handleEvent(uint32_t senderInstanceId,uint16_t eventType,const void * eventData)77 void GetTimeTest::handleEvent(uint32_t senderInstanceId,
78 uint16_t eventType, const void* eventData) {
79 // We ignore the return value, since we expect no data.
80 getMessageDataFromHostEvent(senderInstanceId, eventType, eventData,
81 MessageType::kContinue, 0);
82 if (mContinueCount > 0) {
83 sendFatalFailureToHost("Multiple kContinue messages sent");
84 }
85
86 mContinueCount++;
87 uint64_t time = nanoapp_testing::hostToLittleEndian(chreGetTime());
88 sendMessageToHost(MessageType::kContinue, &time, sizeof(time));
89 // We do nothing else in the CHRE. It's up to the Host to declare
90 // if we've passed.
91 }
92
93 } // namespace general_test
94