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 com.android.ahat.heapdump; 18 19 /** 20 * Enumeration representing object root types as defined in the binary heap 21 * dump format specification. 22 */ 23 public enum RootType { 24 /** 25 * There is a JNI Global Reference for the object in question. 26 */ 27 JNI_GLOBAL (1 << 0), 28 29 /** 30 * There is a JNI Local Reference for the object in question. 31 */ 32 JNI_LOCAL (1 << 1), 33 34 /** 35 * The object in question is a parameter or local variable of a running 36 * method. 37 */ 38 JAVA_FRAME (1 << 2), 39 40 /** 41 * The object in question is a parameter of a running JNI method. 42 */ 43 NATIVE_STACK (1 << 3), 44 45 /** 46 * The object is a class object that cannot be unloaded. 47 */ 48 STICKY_CLASS (1 << 4), 49 50 /** 51 * The object is referenced from an active thread block. 52 */ 53 THREAD_BLOCK (1 << 5), 54 55 /** 56 * The object's monitor is currently in use. 57 */ 58 MONITOR (1 << 6), 59 60 /** 61 * The object is a running thread. 62 */ 63 THREAD (1 << 7), 64 65 /** 66 * The object is an interned string. 67 */ 68 INTERNED_STRING (1 << 8), 69 70 /** 71 * The object is being used by the debugger. 72 */ 73 DEBUGGER (1 << 9), 74 75 /** 76 * The object is being used by the VM internally. 77 */ 78 VM_INTERNAL (1 << 10), 79 80 /** 81 * The object has no given reason for being considered a root. 82 */ 83 UNKNOWN (1 << 11), 84 85 /** 86 * The object's monitor is currently in use from JNI. 87 */ 88 JNI_MONITOR (1 << 12), 89 90 /** 91 * The object is waiting to be finalized. 92 */ 93 FINALIZING (1 << 13); 94 95 final int mask; 96 RootType(int mask)97 RootType(int mask) { 98 this.mask = mask; 99 } 100 } 101