| /* |
| * 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.io.IOException; |
| import java.util.Set; |
| |
| public class ClassInstance extends Instance { |
| private byte[] mFieldValues; |
| |
| public ClassInstance(long id, StackTrace stack, long classId) { |
| mId = id; |
| mStack = stack; |
| mClassId = classId; |
| } |
| |
| public final void loadFieldData(DataInputStream in, int numBytes) |
| throws IOException { |
| mFieldValues = new byte[numBytes]; |
| in.readFully(mFieldValues); |
| } |
| |
| @Override |
| public void resolveReferences(State state) { |
| ClassObj isa = mHeap.mState.findClass(mClassId); |
| |
| resolve(state, isa, isa.mStaticFieldTypes, isa.mStaticFieldValues); |
| resolve(state, isa, isa.mFieldTypes, mFieldValues); |
| } |
| |
| private void resolve(State state, ClassObj isa, int[] types, |
| byte[] values) { |
| ByteArrayInputStream bais = new ByteArrayInputStream(values); |
| DataInputStream dis = new DataInputStream(bais); |
| final int N = types.length; |
| |
| /* |
| * Spin through the list of fields, find all object references, |
| * and list ourselves as a reference holder. |
| */ |
| try { |
| for (int i = 0; i < N; i++) { |
| int type = types[i]; |
| int size = Types.getTypeSize(type); |
| |
| if (type == Types.OBJECT) { |
| long id; |
| |
| if (size == 4) { |
| id = dis.readInt(); |
| } else { |
| id = dis.readLong(); |
| } |
| |
| Instance instance = state.findReference(id); |
| |
| if (instance != null) { |
| instance.addParent(this); |
| } |
| } else { |
| dis.skipBytes(size); |
| } |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| @Override |
| public final int getSize() { |
| ClassObj isa = mHeap.mState.findClass(mClassId); |
| |
| return isa.getSize(); |
| } |
| |
| @Override |
| public final void visit(Set<Instance> resultSet, Filter filter) { |
| if (resultSet.contains(this)) { |
| return; |
| } |
| |
| if (filter != null) { |
| if (filter.accept(this)) { |
| resultSet.add(this); |
| } |
| } else { |
| resultSet.add(this); |
| } |
| |
| State state = mHeap.mState; |
| ClassObj isa = state.findClass(mClassId); |
| int[] types = isa.mFieldTypes; |
| ByteArrayInputStream bais = new ByteArrayInputStream(mFieldValues); |
| DataInputStream dis = new DataInputStream(bais); |
| final int N = types.length; |
| |
| /* |
| * Spin through the list of fields, find all object references, |
| * and list ourselves as a reference holder. |
| */ |
| try { |
| for (int i = 0; i < N; i++) { |
| int type = types[i]; |
| int size = Types.getTypeSize(type); |
| |
| if (type == Types.OBJECT) { |
| long id; |
| |
| if (size == 4) { |
| id = dis.readInt(); |
| } else { |
| id = dis.readLong(); |
| } |
| |
| Instance instance = state.findReference(id); |
| |
| if (instance != null) { |
| instance.visit(resultSet, filter); |
| } |
| } else { |
| dis.skipBytes(size); |
| } |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| @Override |
| public final String getTypeName() { |
| ClassObj theClass = mHeap.mState.findClass(mClassId); |
| |
| return theClass.mClassName; |
| } |
| |
| public final String toString() { |
| return String.format("%s@0x%08x", getTypeName(), mId); |
| } |
| |
| @Override |
| public String describeReferenceTo(long referent) { |
| ClassObj isa = mHeap.mState.findClass(mClassId); |
| int[] types = isa.mFieldTypes; |
| String[] fieldNames = isa.mFieldNames; |
| ByteArrayInputStream bais = new ByteArrayInputStream(mFieldValues); |
| DataInputStream dis = new DataInputStream(bais); |
| final int N = types.length; |
| StringBuilder result = new StringBuilder("Referenced in field(s):"); |
| int numReferences = 0; |
| |
| /* |
| * Spin through the list of fields, add info about the field |
| * references to the output text. |
| */ |
| try { |
| for (int i = 0; i < N; i++) { |
| int type = types[i]; |
| int size = Types.getTypeSize(type); |
| |
| if (type == Types.OBJECT) { |
| long id; |
| |
| if (size == 4) { |
| id = dis.readInt(); |
| } else { |
| id = dis.readLong(); |
| } |
| |
| if (id == referent) { |
| numReferences++; |
| result.append("\n "); |
| result.append(fieldNames[i]); |
| } |
| } else { |
| dis.skipBytes(size); |
| } |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| |
| /* |
| * TODO: perform a similar loop over the static fields of isa |
| */ |
| |
| if (numReferences == 0) { |
| return super.describeReferenceTo(referent); |
| } |
| |
| return result.toString(); |
| } |
| } |