1 /*
2 * Copyright (C) 2013 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 #define LOG_TAG "CameraTraces"
18 #define ATRACE_TAG ATRACE_TAG_CAMERA
19 //#define LOG_NDEBUG 0
20
21 #include "utils/CameraTraces.h"
22 #include <utils/ProcessCallStack.h>
23
24 #include <utils/Mutex.h>
25 #include <utils/List.h>
26
27 #include <utils/Log.h>
28 #include <cutils/trace.h>
29
30 namespace android {
31 namespace camera3 {
32
33 struct CameraTracesImpl {
34 Mutex tracesLock;
35 List<ProcessCallStack> pcsList;
36 }; // class CameraTraces::Impl;
37
38 static CameraTracesImpl gImpl;
39 CameraTracesImpl& CameraTraces::sImpl = gImpl;
40
saveTrace()41 void CameraTraces::saveTrace() {
42 ALOGV("%s: begin", __FUNCTION__);
43 ATRACE_BEGIN("CameraTraces::saveTrace");
44 Mutex::Autolock al(sImpl.tracesLock);
45
46 List<ProcessCallStack>& pcsList = sImpl.pcsList;
47
48 // Insert new ProcessCallStack, and immediately crawl all the threads
49 pcsList.push_front(ProcessCallStack());
50 ProcessCallStack& pcs = *pcsList.begin();
51 pcs.update();
52
53 if (pcsList.size() > MAX_TRACES) {
54 // Prune list periodically and discard oldest entry
55 pcsList.erase(--pcsList.end());
56 }
57
58 IF_ALOGV() {
59 pcs.log(LOG_TAG, ANDROID_LOG_VERBOSE);
60 }
61
62 ALOGD("Process trace saved. Use dumpsys media.camera to view.");
63
64 ATRACE_END();
65 }
66
dump(int fd,const Vector<String16> & args)67 status_t CameraTraces::dump(int fd, const Vector<String16> &args __attribute__((unused))) {
68 ALOGV("%s: fd = %d", __FUNCTION__, fd);
69 Mutex::Autolock al(sImpl.tracesLock);
70 List<ProcessCallStack>& pcsList = sImpl.pcsList;
71
72 if (fd < 0) {
73 ALOGW("%s: Negative FD (%d)", __FUNCTION__, fd);
74 return BAD_VALUE;
75 }
76
77 dprintf(fd, "Camera traces (%zu):\n", pcsList.size());
78
79 if (pcsList.empty()) {
80 dprintf(fd, " No camera traces collected.\n");
81 }
82
83 // Print newest items first
84 List<ProcessCallStack>::iterator it, end;
85 for (it = pcsList.begin(), end = pcsList.end(); it != end; ++it) {
86 const ProcessCallStack& pcs = *it;
87 pcs.dump(fd, DUMP_INDENT);
88 }
89
90 return OK;
91 }
92
93 }; // namespace camera3
94 }; // namespace android
95