| 1 | /* |
| 2 | * Copyright 2008 Eric Caspole |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this |
| 5 | * file except in compliance with the License. You may obtain a copy of the License at |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software distributed under |
| 10 | * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 11 | * KIND, either express or implied. See the License for the specific language governing |
| 12 | * permissions and limitations under the License. |
| 13 | */ |
| 14 | package net.sf.madmap; |
| 15 | |
| 16 | import java.util.*; |
| 17 | |
| 18 | /** |
| 19 | * HprofHeapCollectable is the base class for everything that is "collectable" |
| 20 | * in the target process heap, i.e. objects, arrays and classes. This class |
| 21 | * has methods to compute the liveness and retained size during the analysis. |
| 22 | * |
| 23 | * @author ecaspole |
| 24 | * |
| 25 | */ |
| 26 | public abstract class HprofHeapCollectable extends HprofHeapElement { |
| 27 | |
| 28 | // highest bit is sign bit |
| 29 | static final long _liveBits = 0x40000000; |
| 30 | static final long _claimedBits = 0x20000000; |
| 31 | static final long _sizeBits = 0x1fffffff; |
| 32 | |
| 33 | // support for iterative retained size accumulation |
| 34 | protected Stack _visitedChildren; |
| 35 | long _retainedSize = 0; |
| 36 | |
| 37 | public long getRetainedSize() { return (_retainedSize << 3) >> 3; } |
| 38 | public void claim() { _retainedSize = (_retainedSize | (_claimedBits << 32)); } |
| 39 | public boolean isClaimed() { return (_retainedSize & (_claimedBits << 32)) != 0; } |
| 40 | public void setClaimed( boolean x ) { |
| 41 | if ( x ) { |
| 42 | claim(); |
| 43 | } else { |
| 44 | _retainedSize = (_retainedSize & (~(_claimedBits<<32))); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | public boolean isAlive() { return (_retainedSize & (_liveBits << 32 )) != 0; } |
| 49 | public void setLiveness( boolean lv ) { |
| 50 | if ( lv ) { |
| 51 | _retainedSize = _retainedSize | (_liveBits << 32); |
| 52 | } else { |
| 53 | _retainedSize = _retainedSize & (~(_liveBits << 32)); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @param newSize the object's retained size, computed in the analysis phase |
| 59 | */ |
| 60 | public void setRetainedSize( long newSize) { |
| 61 | long oldBits = _retainedSize >> 61; |
| 62 | _retainedSize = newSize | (oldBits << 61); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * @param addr address of the object |
| 67 | */ |
| 68 | public HprofHeapCollectable( long addr ) { |
| 69 | super( addr ); |
| 70 | } |
| 71 | |
| 72 | long[] longArrayListtoLongArray( ArrayList in ) { |
| 73 | if ( in == null ) { |
| 74 | return null; |
| 75 | } |
| 76 | if ( in.size() == 0 ) { |
| 77 | return null; |
| 78 | } |
| 79 | long[] out = new long[ in.size() ]; |
| 80 | for ( int i = 0; i < out.length; i++ ) { |
| 81 | out[ i ] = ((Long) in.get( i )).longValue(); |
| 82 | } |
| 83 | return out; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | public abstract String className(); |
| 88 | public abstract long children_size(); |
| 89 | public abstract long[] children(); |
| 90 | public abstract long size(); |
| 91 | |
| 92 | /** |
| 93 | * @param ref the address to find in this object |
| 94 | * @return true if ref is a member of this object |
| 95 | */ |
| 96 | public boolean containsRef( long ref ) { |
| 97 | for ( int i = 0; i < children_size(); i ++ ) { |
| 98 | if ( children()[i] == ref ) { |
| 99 | return true; |
| 100 | } |
| 101 | } |
| 102 | return false; |
| 103 | } |
| 104 | |
| 105 | void visited( HprofHeapCollectable child ) { |
| 106 | if ( _visitedChildren == null ) { |
| 107 | _visitedChildren = new Stack(); |
| 108 | } |
| 109 | _visitedChildren.push( child ); |
| 110 | } |
| 111 | |
| 112 | Stack getVisitedStack() { return _visitedChildren; } |
| 113 | int getVisitedCount() { |
| 114 | return _visitedChildren == null ? 0 : _visitedChildren.size(); |
| 115 | } |
| 116 | |
| 117 | void resetVisited() { |
| 118 | _visitedChildren = null; |
| 119 | } |
| 120 | } |