1e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom/* 2e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * Copyright (C) 2010 The Android Open Source Project 3e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * 4e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * Licensed under the Apache License, Version 2.0 (the "License"); 5e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * you may not use this file except in compliance with the License. 6e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * You may obtain a copy of the License at 7e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * 8e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * http://www.apache.org/licenses/LICENSE-2.0 9e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * 10e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * Unless required by applicable law or agreed to in writing, software 11e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * distributed under the License is distributed on an "AS IS" BASIS, 12e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * See the License for the specific language governing permissions and 14e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * limitations under the License. 15e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom */ 16e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom 17e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrompackage dalvik.system.profiler; 18e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom 19e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstromimport java.util.Arrays; 20e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom 21e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom/** 22e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * ThreadSampler implementation that only uses Thread.getStackTrace() 23e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom * and therefore is portable. 24e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom */ 25e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstromclass PortableThreadSampler implements ThreadSampler { 26e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom 27e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom private int depth; 28e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom 29e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom @Override public void setDepth(int depth) { 30e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom this.depth = depth; 31e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom } 32e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom 33e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom @Override public StackTraceElement[] getStackTrace(Thread thread) { 34e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom StackTraceElement[] stackFrames = thread.getStackTrace(); 35e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom if (stackFrames.length == 0) { 36e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom return null; 37e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom } 38e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom if (stackFrames.length > depth) { 39e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom stackFrames = Arrays.copyOfRange(stackFrames, 0, depth); 40e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom } 41e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom return stackFrames; 42e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom } 43e9af8901fc4ed7c05d085e2e492f5dcc857f0146Brian Carlstrom} 44