1 /* 2 * Copyright (C) 2017 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 art; 18 19 import java.lang.reflect.Field; 20 import java.lang.reflect.Executable; 21 22 public class StackTrace { 23 public static class StackFrameData { 24 public final Thread thr; 25 public final Executable method; 26 public final long current_location; 27 public final int depth; 28 StackFrameData(Thread thr, Executable e, long loc, int depth)29 public StackFrameData(Thread thr, Executable e, long loc, int depth) { 30 this.thr = thr; 31 this.method = e; 32 this.current_location = loc; 33 this.depth = depth; 34 } 35 @Override toString()36 public String toString() { 37 return String.format( 38 "StackFrameData { thr: '%s', method: '%s', loc: %d, depth: %d }", 39 this.thr, 40 this.method, 41 this.current_location, 42 this.depth); 43 } 44 } 45 GetStackDepth(Thread thr)46 public static native int GetStackDepth(Thread thr); 47 nativeGetStackTrace(Thread thr)48 private static native StackFrameData[] nativeGetStackTrace(Thread thr); 49 GetStackTrace(Thread thr)50 public static StackFrameData[] GetStackTrace(Thread thr) { 51 // The RI seems to give inconsistent (and sometimes nonsensical) results if the thread is not 52 // suspended. The spec says that not being suspended is fine but since we want this to be 53 // consistent we will suspend for the RI. 54 boolean suspend_thread = 55 !System.getProperty("java.vm.name").equals("Dalvik") && 56 !thr.equals(Thread.currentThread()) && 57 !Suspension.isSuspended(thr); 58 if (suspend_thread) { 59 Suspension.suspend(thr); 60 } 61 StackFrameData[] out = nativeGetStackTrace(thr); 62 if (suspend_thread) { 63 Suspension.resume(thr); 64 } 65 return out; 66 } 67 } 68 69