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