1 /* 2 * Copyright (C) 2014 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 import java.lang.reflect.Method; 20 21 public class Main { 22 public static void main(String[] args) throws Exception { 23 String name = System.getProperty("java.vm.name"); 24 if (!"Dalvik".equals(name)) { 25 System.out.println("This test is not supported on " + name); 26 return; 27 } 28 testMethodTracing(); 29 } 30 31 private static void testMethodTracing() throws Exception { 32 File tempFile; 33 try { 34 tempFile = File.createTempFile("test", ".trace"); 35 } catch (IOException e) { 36 System.setProperty("java.io.tmpdir", "/sdcard"); 37 tempFile = File.createTempFile("test", ".trace"); 38 } 39 tempFile.deleteOnExit(); 40 String tempFileName = tempFile.getPath(); 41 42 if (VMDebug.getMethodTracingMode() != 0) { 43 VMDebug.stopMethodTracing(); 44 } 45 46 System.out.println("Confirm enable/disable"); 47 System.out.println("status=" + VMDebug.getMethodTracingMode()); 48 VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0); 49 System.out.println("status=" + VMDebug.getMethodTracingMode()); 50 VMDebug.stopMethodTracing(); 51 System.out.println("status=" + VMDebug.getMethodTracingMode()); 52 if (tempFile.length() == 0) { 53 System.out.println("ERROR: tracing output file is empty"); 54 } 55 56 System.out.println("Confirm sampling"); 57 VMDebug.startMethodTracing(tempFileName, 0, 0, true, 1000); 58 System.out.println("status=" + VMDebug.getMethodTracingMode()); 59 VMDebug.stopMethodTracing(); 60 System.out.println("status=" + VMDebug.getMethodTracingMode()); 61 if (tempFile.length() == 0) { 62 System.out.println("ERROR: sample tracing output file is empty"); 63 } 64 65 System.out.println("Test starting when already started"); 66 VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0); 67 System.out.println("status=" + VMDebug.getMethodTracingMode()); 68 VMDebug.startMethodTracing(tempFileName, 0, 0, false, 0); 69 System.out.println("status=" + VMDebug.getMethodTracingMode()); 70 71 System.out.println("Test stopping when already stopped"); 72 VMDebug.stopMethodTracing(); 73 System.out.println("status=" + VMDebug.getMethodTracingMode()); 74 VMDebug.stopMethodTracing(); 75 System.out.println("status=" + VMDebug.getMethodTracingMode()); 76 77 System.out.println("Test tracing with empty filename"); 78 try { 79 VMDebug.startMethodTracing("", 0, 0, false, 0); 80 System.out.println("Should have thrown an exception"); 81 } catch (Exception e) { 82 System.out.println("Got expected exception"); 83 } 84 85 System.out.println("Test tracing with bogus (< 1024 && != 0) filesize"); 86 try { 87 VMDebug.startMethodTracing(tempFileName, 1000, 0, false, 0); 88 System.out.println("Should have thrown an exception"); 89 } catch (Exception e) { 90 System.out.println("Got expected exception"); 91 } 92 93 System.out.println("Test sampling with bogus (<= 0) interval"); 94 try { 95 VMDebug.startMethodTracing(tempFileName, 0, 0, true, 0); 96 System.out.println("Should have thrown an exception"); 97 } catch (Exception e) { 98 System.out.println("Got expected exception"); 99 } 100 101 tempFile.delete(); 102 } 103 104 private static class VMDebug { 105 private static final Method startMethodTracingMethod; 106 private static final Method stopMethodTracingMethod; 107 private static final Method getMethodTracingModeMethod; 108 static { 109 try { 110 Class c = Class.forName("dalvik.system.VMDebug"); 111 startMethodTracingMethod = c.getDeclaredMethod("startMethodTracing", String.class, 112 Integer.TYPE, Integer.TYPE, Boolean.TYPE, Integer.TYPE); 113 stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing"); 114 getMethodTracingModeMethod = c.getDeclaredMethod("getMethodTracingMode"); 115 } catch (Exception e) { 116 throw new RuntimeException(e); 117 } 118 } 119 120 public static void startMethodTracing(String filename, int bufferSize, int flags, 121 boolean samplingEnabled, int intervalUs) throws Exception { 122 startMethodTracingMethod.invoke(null, filename, bufferSize, flags, samplingEnabled, 123 intervalUs); 124 } 125 public static void stopMethodTracing() throws Exception { 126 stopMethodTracingMethod.invoke(null); 127 } 128 public static int getMethodTracingMode() throws Exception { 129 return (int) getMethodTracingModeMethod.invoke(null); 130 } 131 } 132 } 133
