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 <cstdio>
18
19 #include "chre/core/event_loop_manager.h"
20 #include "chre/platform/system_time.h"
21 #include "chre/util/nested_data_ptr.h"
22
23 #ifdef CHRE_USE_TOKENIZED_LOGGING
24 namespace {
25
26 static constexpr size_t kLogBufferSize = 60;
27
28 } // anonymous namespace
29
30 // The callback function that must be defined to handle an encoded
31 // tokenizer message.
pw_TokenizerHandleEncodedMessageWithPayload(void * userPayload,const uint8_t encodedMsg[],size_t encodedMsgSize)32 void pw_TokenizerHandleEncodedMessageWithPayload(void *userPayload,
33 const uint8_t encodedMsg[],
34 size_t encodedMsgSize) {
35 // The header encoding here follows the message definition in the
36 // host_messages.fbs flatbuffers file.
37 uint8_t logBuffer[kLogBufferSize];
38 constexpr size_t kLogMessageHeaderSizeBytes = 1 + sizeof(uint64_t);
39 uint8_t *pLogBuffer = &logBuffer[0];
40
41 chre::NestedDataPtr<uint8_t> nestedLevel;
42 nestedLevel.dataPtr = userPayload;
43 *pLogBuffer = nestedLevel.data;
44 ++pLogBuffer;
45
46 uint64_t timestampNanos =
47 chre::SystemTime::getMonotonicTime().toRawNanoseconds();
48 memcpy(pLogBuffer, ×tampNanos, sizeof(uint64_t));
49 pLogBuffer += sizeof(uint64_t);
50 memcpy(pLogBuffer, encodedMsg, encodedMsgSize);
51
52 // TODO (b/148873804): buffer log messages generated while the AP is asleep
53 auto &hostCommsMgr =
54 chre::EventLoopManagerSingleton::get()->getHostCommsManager();
55 hostCommsMgr.sendLogMessage(reinterpret_cast<const char *>(logBuffer),
56 encodedMsgSize + kLogMessageHeaderSizeBytes);
57 }
58 #endif
59