| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package dalvik.system.profiler; |
| |
| import java.io.IOException; |
| |
| /** |
| * The {@code ThreadSampler} interfaces allows a profiler to choose |
| * between portable and VM specific implementations of thread |
| * sampling. |
| */ |
| public interface ThreadSampler { |
| |
| /** |
| * Used to specify the maximum stack depth to collect. |
| */ |
| public void setDepth(int depth); |
| |
| /** |
| * Return a stack trace for the current thread limited by the |
| * maximum depth specified by {@link #setDepth setDepth}. May |
| * return null if no sample is availble for the thread, which may |
| * happen in cases such as thread termination. The resulting array |
| * should be copied before the next call to {@code getStackTrace} |
| * if the caller wants to use the results, since the {@code |
| * ThreadSampler} may reuse the array. Note that the elements |
| * themselves are immutable and do not need to be copied. |
| */ |
| public StackTraceElement[] getStackTrace(Thread thread); |
| } |