| /* |
| * Copyright (C) 2008 Google Inc. |
| * |
| * 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 com.android.hit; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInputStream; |
| import java.util.Set; |
| |
| public class ArrayInstance extends Instance { |
| private int mType; |
| private int mNumEntries; |
| private byte[] mData; |
| |
| public ArrayInstance(long id, StackTrace stack, int type, int numEntries, |
| byte[] data) { |
| mId = id; |
| mStack = stack; |
| mType = type; |
| mNumEntries = numEntries; |
| mData = data; |
| } |
| |
| public final void resolveReferences(State state) { |
| if (mType != Types.OBJECT) { |
| return; |
| } |
| |
| /* |
| * mData holds a stream of object instance ids |
| * Spin through them all and list ourselves as a reference holder. |
| */ |
| int idSize = Types.getTypeSize(mType); |
| final int N = mNumEntries; |
| |
| ByteArrayInputStream bais = new ByteArrayInputStream(mData); |
| DataInputStream dis = new DataInputStream(bais); |
| |
| for (int i = 0; i < N; i++) { |
| long id; |
| |
| try { |
| if (idSize == 4) { |
| id = dis.readInt(); |
| } else { |
| id = dis.readLong(); |
| } |
| |
| Instance instance = state.findReference(id); |
| |
| if (instance != null) { |
| instance.addParent(this); |
| } |
| } catch (java.io.IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| |
| @Override |
| public final int getSize() { |
| return mData.length; |
| } |
| |
| @Override |
| public final void visit(Set<Instance> resultSet, Filter filter) { |
| // If we're in the set then we and our children have been visited |
| if (resultSet.contains(this)) { |
| return; |
| } |
| |
| if (null != filter) { |
| if (filter.accept(this)) { |
| resultSet.add(this); |
| } |
| } else { |
| resultSet.add(this); |
| } |
| |
| if (mType != Types.OBJECT) { |
| return; |
| } |
| |
| /* |
| * mData holds a stream of object instance ids |
| * Spin through them all and visit them |
| */ |
| int idSize = Types.getTypeSize(mType); |
| final int N = mNumEntries; |
| |
| ByteArrayInputStream bais = new ByteArrayInputStream(mData); |
| DataInputStream dis = new DataInputStream(bais); |
| State state = mHeap.mState; |
| |
| for (int i = 0; i < N; i++) { |
| long id; |
| |
| try { |
| if (idSize == 4) { |
| id = dis.readInt(); |
| } else { |
| id = dis.readLong(); |
| } |
| |
| Instance instance = state.findReference(id); |
| |
| if (instance != null) { |
| instance.visit(resultSet, filter); |
| } |
| } catch (java.io.IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| |
| @Override |
| public final String getTypeName() { |
| return Types.getTypeName(mType) + "[" + mNumEntries + "]"; |
| } |
| |
| public final String toString() { |
| return String.format("%s@0x08x", getTypeName(), mId); |
| } |
| |
| @Override |
| public String describeReferenceTo(long referent) { |
| // If this isn't an object array then we can't refer to an object |
| if (mType != Types.OBJECT) { |
| return super.describeReferenceTo(referent); |
| } |
| |
| int idSize = Types.getTypeSize(mType); |
| final int N = mNumEntries; |
| int numRefs = 0; |
| StringBuilder result = new StringBuilder("Elements ["); |
| ByteArrayInputStream bais = new ByteArrayInputStream(mData); |
| DataInputStream dis = new DataInputStream(bais); |
| |
| /* |
| * Spin through all the objects and build up a string describing |
| * all of the array elements that refer to the target object. |
| */ |
| for (int i = 0; i < N; i++) { |
| long id; |
| |
| try { |
| if (idSize == 4) { |
| id = dis.readInt(); |
| } else { |
| id = dis.readLong(); |
| } |
| |
| if (id == referent) { |
| numRefs++; |
| |
| if (numRefs > 1) { |
| result.append(", "); |
| } |
| |
| result.append(i); |
| } |
| } catch (java.io.IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| if (numRefs == 0) { |
| return super.describeReferenceTo(referent); |
| } |
| |
| result.append("]"); |
| |
| return result.toString(); |
| } |
| } |