1 /*
2  * Copyright (C) 2022 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 import java.io.File;
18 import java.io.IOException;
19 
20 public class StreamTraceParser extends BaseTraceParser {
21 
CheckTraceFileFormat(File file, int expectedVersion, String threadName)22     public void CheckTraceFileFormat(File file,
23         int expectedVersion, String threadName) throws Exception {
24         InitializeParser(file);
25 
26         validateTraceHeader(expectedVersion);
27         boolean hasEntries = true;
28         boolean seenStopTracingMethod = false;
29         while (hasEntries) {
30             int threadId = GetThreadID();
31             if (threadId != 0) {
32               String eventString = ProcessEventEntry(threadId);
33               if (!ShouldCheckThread(threadId, threadName)) {
34                 continue;
35               }
36               // Ignore events after method tracing was stopped. The code that is executed
37               // later could be non-deterministic.
38               if (!seenStopTracingMethod) {
39                 UpdateThreadEvents(threadId, eventString);
40               }
41               if (eventString.contains("Main$VMDebug $noinline$stopMethodTracing")) {
42                 seenStopTracingMethod = true;
43               }
44             } else {
45               int headerType = GetEntryHeader();
46               switch (headerType) {
47                 case 1:
48                   ProcessMethodInfoEntry();
49                   break;
50                 case 2:
51                   ProcessThreadInfoEntry();
52                   break;
53                 case 3:
54                   // TODO(mythria): Add test to also check format of trace summary.
55                   hasEntries = false;
56                   break;
57                 default:
58                   System.out.println("Unexpected header in the trace " + headerType);
59               }
60             }
61         }
62         closeFile();
63 
64         // Printout the events.
65         for (String str : threadEventsMap.values()) {
66             System.out.println(str);
67         }
68     }
69 }
70