1 /* 2 * Copyright (C) 2015 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 // This file is a copy of 802-deoptimization/src/DeoptimizationController.java 18 // because run-test requires standalone individual test. 19 20 import java.io.File; 21 import java.io.IOException; 22 import java.lang.reflect.Method; 23 24 /** 25 * Controls deoptimization using dalvik.system.VMDebug class. 26 */ 27 public class DeoptimizationController { 28 private static final String TEMP_FILE_NAME_PREFIX = "test"; 29 private static final String TEMP_FILE_NAME_SUFFIX = ".trace"; 30 31 private static File createTempFile() throws Exception { 32 try { 33 return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX); 34 } catch (IOException e) { 35 System.setProperty("java.io.tmpdir", "/data/local/tmp"); 36 try { 37 return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX); 38 } catch (IOException e2) { 39 System.setProperty("java.io.tmpdir", "/sdcard"); 40 return File.createTempFile(TEMP_FILE_NAME_PREFIX, TEMP_FILE_NAME_SUFFIX); 41 } 42 } 43 } 44 45 public static void startDeoptimization() { 46 File tempFile = null; 47 try { 48 tempFile = createTempFile(); 49 String tempFileName = tempFile.getPath(); 50 51 VMDebug.startMethodTracing(tempFileName, 0, 0, false, 1000); 52 if (VMDebug.getMethodTracingMode() == 0) { 53 throw new IllegalStateException("Not tracing."); 54 } 55 } catch (Exception exc) { 56 exc.printStackTrace(System.out); 57 } finally { 58 if (tempFile != null) { 59 tempFile.delete(); 60 } 61 } 62 } 63 64 public static void stopDeoptimization() { 65 try { 66 VMDebug.stopMethodTracing(); 67 if (VMDebug.getMethodTracingMode() != 0) { 68 throw new IllegalStateException("Still tracing."); 69 } 70 } catch (Exception exc) { 71 exc.printStackTrace(System.out); 72 } 73 } 74 75 private static class VMDebug { 76 private static final Method startMethodTracingMethod; 77 private static final Method stopMethodTracingMethod; 78 private static final Method getMethodTracingModeMethod; 79 80 static { 81 try { 82 Class<?> c = Class.forName("dalvik.system.VMDebug"); 83 startMethodTracingMethod = c.getDeclaredMethod("startMethodTracing", String.class, 84 Integer.TYPE, Integer.TYPE, Boolean.TYPE, Integer.TYPE); 85 stopMethodTracingMethod = c.getDeclaredMethod("stopMethodTracing"); 86 getMethodTracingModeMethod = c.getDeclaredMethod("getMethodTracingMode"); 87 } catch (Exception e) { 88 throw new RuntimeException(e); 89 } 90 } 91 92 public static void startMethodTracing(String filename, int bufferSize, int flags, 93 boolean samplingEnabled, int intervalUs) throws Exception { 94 startMethodTracingMethod.invoke(null, filename, bufferSize, flags, samplingEnabled, 95 intervalUs); 96 } 97 public static void stopMethodTracing() throws Exception { 98 stopMethodTracingMethod.invoke(null); 99 } 100 public static int getMethodTracingMode() throws Exception { 101 return (int) getMethodTracingModeMethod.invoke(null); 102 } 103 } 104 } 105
