1 /* 2 * Copyright (C) 2007 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 org.apache.harmony.dalvik.ddmc; 18 19 /** 20 * Declarations for some VM-internal DDM stuff. 21 */ 22 public class DdmVmInternal { 23 24 /* do not instantiate */ 25 private DdmVmInternal() {} 26 27 /** 28 * Enable thread notification. 29 * 30 * This is built into the VM, since that's where threads get managed. 31 */ 32 native public static void threadNotify(boolean enable); 33 34 /** 35 * Enable heap info updates. 36 * 37 * This is built into the VM, since that's where the heap is managed. 38 * 39 * @param when when to send the next HPIF chunk 40 * @return true on success. false if 'when' is bad or if there was 41 * an internal error. 42 */ 43 native public static boolean heapInfoNotify(int when); 44 45 /** 46 * Enable heap segment updates for the java (isNative == false) or 47 * native (isNative == true) heap. 48 * 49 * This is built into the VM, since that's where the heap is managed. 50 */ 51 native public static boolean heapSegmentNotify(int when, int what, 52 boolean isNative); 53 54 /** 55 * Get status info for all threads. This is for the THST chunk. 56 * 57 * Returns a byte array with the THST data, or null if something 58 * went wrong. 59 */ 60 native public static byte[] getThreadStats(); 61 62 /** 63 * Get a stack trace for the specified thread ID. The ID can be found 64 * in the data from getThreadStats. 65 */ 66 native public static StackTraceElement[] getStackTraceById(int threadId); 67 68 /** 69 * Enable or disable "recent allocation" tracking. 70 */ 71 native public static void enableRecentAllocations(boolean enable); 72 73 /* 74 * Return a boolean indicating whether or not the "recent allocation" 75 * feature is currently enabled. 76 */ 77 native public static boolean getRecentAllocationStatus(); 78 79 /** 80 * Fill a buffer with data on recent heap allocations. 81 */ 82 native public static byte[] getRecentAllocations(); 83 } 84 85
