1 /* 2 * Copyright (C) 2016 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 package com.android.bugreport.stacks; 18 19 import com.android.bugreport.cpuinfo.CpuUsageParser; 20 import com.android.bugreport.cpuinfo.CpuUsageSnapshot; 21 import com.android.bugreport.util.Utils; 22 import com.android.bugreport.util.Line; 23 import com.android.bugreport.util.Lines; 24 import com.android.bugreport.stacks.ProcessSnapshot; 25 import com.android.bugreport.stacks.ProcessSnapshotParser; 26 import com.android.bugreport.stacks.VmTraces; 27 28 import java.io.BufferedReader; 29 import java.io.IOException; 30 import java.util.ArrayList; 31 import java.util.regex.Pattern; 32 import java.util.regex.Matcher; 33 34 /** 35 * Parse an anr block from a monkey log. 36 * 37 * The parser can be reused, but is not thread safe. 38 */ 39 public class VmTracesParser { 40 41 private final Matcher mBeginProcessRe = ProcessSnapshotParser.BEGIN_PROCESS_RE.matcher(""); 42 43 /** 44 * Construct a new parser. 45 */ VmTracesParser()46 public VmTracesParser() { 47 } 48 49 /** 50 * Do the parsing. 51 */ parse(Lines<? extends Line> lines)52 public VmTraces parse(Lines<? extends Line> lines) { 53 final VmTraces result = new VmTraces(); 54 55 // Drop any preamble 56 while (lines.hasNext()) { 57 final Line line = lines.next(); 58 final String text = line.text; 59 if (Utils.matches(mBeginProcessRe, text)) { 60 lines.rewind(); 61 break; 62 } 63 } 64 65 while (lines.hasNext()) { 66 final Line line = lines.next(); 67 final String text = line.text; 68 69 if (Utils.matches(mBeginProcessRe, text)) { 70 lines.rewind(); 71 ProcessSnapshotParser parser = new ProcessSnapshotParser(); 72 final ProcessSnapshot snapshot = parser.parse(lines); 73 if (snapshot != null) { 74 result.processes.add(snapshot); 75 } else { 76 // TODO: Try to backtrack and correct the parsing. 77 } 78 } else { 79 if (false) { 80 System.out.println("VmTracesParser Dropping: " + text); 81 } 82 } 83 } 84 85 return result; 86 } 87 88 } 89 90 91