1 /*
2 * Copyright 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 #undef LOG_TAG
17 #define LOG_TAG "SurfaceTracing"
18 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
19
20 #include "SurfaceTracing.h"
21
22 #include <android-base/file.h>
23 #include <log/log.h>
24 #include <utils/SystemClock.h>
25 #include <utils/Trace.h>
26
27 namespace android {
28
enable()29 void SurfaceTracing::enable() {
30 if (mEnabled) {
31 return;
32 }
33 ATRACE_CALL();
34 mEnabled = true;
35 std::lock_guard<std::mutex> protoGuard(mTraceMutex);
36
37 mTrace.set_magic_number(uint64_t(LayersTraceFileProto_MagicNumber_MAGIC_NUMBER_H) << 32 |
38 LayersTraceFileProto_MagicNumber_MAGIC_NUMBER_L);
39 }
40
disable()41 status_t SurfaceTracing::disable() {
42 if (!mEnabled) {
43 return NO_ERROR;
44 }
45 ATRACE_CALL();
46 std::lock_guard<std::mutex> protoGuard(mTraceMutex);
47 mEnabled = false;
48 status_t err(writeProtoFileLocked());
49 ALOGE_IF(err == PERMISSION_DENIED, "Could not save the proto file! Permission denied");
50 ALOGE_IF(err == NOT_ENOUGH_DATA, "Could not save the proto file! There are missing fields");
51 mTrace.Clear();
52 return err;
53 }
54
isEnabled()55 bool SurfaceTracing::isEnabled() {
56 return mEnabled;
57 }
58
traceLayers(const char * where,LayersProto layers)59 void SurfaceTracing::traceLayers(const char* where, LayersProto layers) {
60 std::lock_guard<std::mutex> protoGuard(mTraceMutex);
61
62 LayersTraceProto* entry = mTrace.add_entry();
63 entry->set_elapsed_realtime_nanos(elapsedRealtimeNano());
64 entry->set_where(where);
65 entry->mutable_layers()->Swap(&layers);
66 }
67
writeProtoFileLocked()68 status_t SurfaceTracing::writeProtoFileLocked() {
69 ATRACE_CALL();
70
71 if (!mTrace.IsInitialized()) {
72 return NOT_ENOUGH_DATA;
73 }
74 std::string output;
75 if (!mTrace.SerializeToString(&output)) {
76 return PERMISSION_DENIED;
77 }
78 if (!android::base::WriteStringToFile(output, mOutputFileName, true)) {
79 return PERMISSION_DENIED;
80 }
81
82 return NO_ERROR;
83 }
84
85 } // namespace android
86