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506 lines
14 KiB
Java
506 lines
14 KiB
Java
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Patrick C. Beard <beard@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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import java.io.*;
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import java.util.*;
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class Type {
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String mName;
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int mSize;
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Type(String name, int size) {
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mName = name;
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mSize = size;
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}
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public int hashCode() {
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return mName.hashCode() + mSize;
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}
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public boolean equals(Object obj) {
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if (obj instanceof Type) {
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Type t = (Type) obj;
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return (t.mSize == mSize && t.mName.equals(mName));
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}
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return false;
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}
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public String toString() {
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return "<A HREF=\"#" + mName + "_" + mSize + "\"><" + mName + "></A> (" + mSize + ")";
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}
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static class Comparator implements QuickSort.Comparator {
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public int compare(Object obj1, Object obj2) {
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Type t1 = (Type) obj1, t2 = (Type) obj2;
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return (t1.mSize - t2.mSize);
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}
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}
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}
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class Leak {
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String mAddress;
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Type mType;
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Object[] mReferences;
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Object[] mCrawl;
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int mRefCount;
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Leak[] mParents;
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int mTotalSize;
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Leak(String addr, Type type, Object[] refs, Object[] crawl) {
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mAddress = addr;
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mReferences = refs;
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mCrawl = crawl;
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mRefCount = 0;
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mType = type;
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mTotalSize = 0;
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}
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void setParents(Vector parents) {
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mParents = new Leak[parents.size()];
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parents.copyInto(mParents);
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}
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void computeTotalSize() {
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// first, mark this node as having been visited.
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// we only want to include nodes that haven't been
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// visited in our total size.
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mTotalSize = mType.mSize;
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// then, visit all nodes that haven't been visited,
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// and include their total size in ours.
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int count = mReferences.length;
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for (int i = 0; i < count; ++i) {
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Object ref = mReferences[i];
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if (ref instanceof Leak) {
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Leak leak = (Leak) ref;
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if (leak.mTotalSize == 0) {
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leak.computeTotalSize();
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mTotalSize += leak.mTotalSize;
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}
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}
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}
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}
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void clearTotalSize() {
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// first, clear our total size.
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mTotalSize = 0;
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// then, visit all nodes that haven't been visited,
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// and clear each one's total size.
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int count = mReferences.length;
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for (int i = 0; i < count; ++i) {
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Object ref = mReferences[i];
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if (ref instanceof Leak) {
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Leak leak = (Leak) ref;
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if (leak.mTotalSize != 0)
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leak.clearTotalSize();
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}
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}
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}
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public String toString() {
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return ("<A HREF=\"#" + mAddress + "\">" + mAddress + "</A> [" + mRefCount + "] " + mType + "{" + mTotalSize + "}");
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}
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static class ByCount implements QuickSort.Comparator {
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public int compare(Object obj1, Object obj2) {
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Leak l1 = (Leak) obj1, l2 = (Leak) obj2;
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return (l1.mRefCount - l2.mRefCount);
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}
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}
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/**
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* Sorts in order of decreasing total size.
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*/
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static class ByTotalSize implements QuickSort.Comparator {
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public int compare(Object obj1, Object obj2) {
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Leak l1 = (Leak) obj1, l2 = (Leak) obj2;
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return (l2.mTotalSize - l1.mTotalSize);
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}
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}
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}
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public class leaksoup {
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private static boolean ROOTS_ONLY = false;
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public static void main(String[] args) {
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if (args.length == 0) {
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System.out.println("usage: leaksoup [-blame] [-assign] [-roots] leaks");
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System.exit(1);
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}
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// assume user want's lxr URLs. (why?)
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FileLocator.USE_BLAME = false;
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FileLocator.ASSIGN_BLAME = false;
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ROOTS_ONLY = false;
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for (int i = 0; i < args.length; i++) {
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String arg = args[i];
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if (arg.charAt(0) == '-') {
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if (arg.equals("-blame"))
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FileLocator.USE_BLAME = true;
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else if (arg.equals("-assign"))
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FileLocator.ASSIGN_BLAME = true;
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else if (arg.equals("-roots"))
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ROOTS_ONLY = true;
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else
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System.out.println("unrecognized option: " + arg);
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} else {
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cook(arg);
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}
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}
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// quit the application.
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System.exit(0);
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}
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static void cook(String inputName) {
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try {
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Vector vec = new Vector();
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Hashtable leakTable = new Hashtable();
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Hashtable types = new Hashtable();
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Histogram hist = new Histogram();
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BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(inputName)));
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String line = reader.readLine();
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while (line != null) {
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if (line.startsWith("0x")) {
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String addr = line.substring(0, 10);
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String name = line.substring(line.indexOf('<') + 1, line.indexOf('>'));
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int size;
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try {
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String str = line.substring(line.indexOf('(') + 1, line.indexOf(')')).trim();
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size = Integer.parseInt(str);
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} catch (NumberFormatException nfe) {
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size = 0;
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}
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// generate a unique type for this object.
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String key = name + "_" + size;
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Type type = (Type) types.get(key);
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if (type == null) {
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type = new Type(name, size);
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types.put(key, type);
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}
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// read in fields.
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vec.setSize(0);
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for (line = reader.readLine(); line != null && line.charAt(0) == '\t'; line = reader.readLine())
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vec.addElement(line.substring(1, 11));
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Object[] refs = new Object[vec.size()];
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vec.copyInto(refs);
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// read in stack crawl.
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vec.setSize(0);
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for (line = reader.readLine(); line != null && !line.equals("Leaked composite object at:"); line = reader.readLine())
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vec.addElement(line.intern());
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Object[] crawl = new Object[vec.size()];
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vec.copyInto(crawl);
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// record the leak.
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leakTable.put(addr, new Leak(addr, type, refs, crawl));
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// count the leak types in a histogram.
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hist.record(type);
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} else {
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line = reader.readLine();
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}
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}
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reader.close();
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Leak[] leaks = new Leak[leakTable.size()];
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int leakCount = 0;
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long totalSize = 0;
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Hashtable parentTable = new Hashtable();
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// now, we have a table full of leaked objects, lets derive reference counts, and build the graph.
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Enumeration e = leakTable.elements();
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while (e.hasMoreElements()) {
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Leak leak = (Leak) e.nextElement();
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Object[] refs = leak.mReferences;
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int count = refs.length;
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for (int i = 0; i < count; i++) {
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String addr = (String) refs[i];
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Leak ref = (Leak) leakTable.get(addr);
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if (ref != null) {
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// increase the ref count.
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ref.mRefCount++;
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// change string to ref itself.
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refs[i] = ref;
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// add leak to ref's parents vector.
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Vector parents = (Vector) parentTable.get(ref);
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if (parents == null) {
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parents = new Vector();
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parentTable.put(ref, parents);
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}
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parents.addElement(leak);
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}
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}
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leaks[leakCount++] = leak;
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totalSize += leak.mType.mSize;
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}
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// be nice to the GC.
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leakTable.clear();
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leakTable = null;
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// set the parents of each leak.
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e = parentTable.keys();
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while (e.hasMoreElements()) {
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Leak leak = (Leak) e.nextElement();
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Vector parents = (Vector) parentTable.get(leak);
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if (parents != null)
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leak.setParents(parents);
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}
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// be nice to the GC.
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parentTable.clear();
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parentTable = null;
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// store the leak report in inputName + ".html"
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PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(inputName + ".html"))));
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Date now = new Date();
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out.println("<TITLE>Leaks as of " + now + "</TITLE>");
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// print leak summary.
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out.println("<H2>Leak Summary</H2>");
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out.println("total objects leaked = " + leakCount + "<BR>");
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out.println("total memory leaked = " + totalSize + " bytes.<BR>");
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// sort the leaks by reference count. then compute each root leak's total size.
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QuickSort byCount = new QuickSort(new Leak.ByCount());
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byCount.sort(leaks);
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for (int i = 0; i < leakCount; ++i) {
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Leak leak = leaks[i];
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if (leak.mTotalSize == 0)
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leak.computeTotalSize();
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}
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// print the object histogram report.
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printHistogram(out, hist);
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// print the leak report.
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if (ROOTS_ONLY)
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printRootLeaks(out, leaks);
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else
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printLeaks(out, leaks);
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out.close();
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} catch (Exception e) {
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e.printStackTrace(System.err);
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}
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}
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/**
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* Sorts the bins of a histogram by (count * typeSize) to show the
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* most pressing leaks.
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*/
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static class HistComparator implements QuickSort.Comparator {
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Histogram hist;
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HistComparator(Histogram hist) {
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this.hist = hist;
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}
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public int compare(Object obj1, Object obj2) {
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Type t1 = (Type) obj1, t2 = (Type) obj2;
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return (hist.count(t1) * t1.mSize - hist.count(t2) * t2.mSize);
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}
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}
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static void printHistogram(PrintWriter out, Histogram hist) throws IOException {
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// sort the objects by histogram count.
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Object[] objects = hist.objects();
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QuickSort sorter = new QuickSort(new HistComparator(hist));
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sorter.sort(objects);
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out.println("<H2>Leak Histogram:</H2>");
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out.println("<PRE>");
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int count = objects.length;
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while (count > 0) {
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Object object = objects[--count];
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out.println(object.toString() + " : " + hist.count(object));
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}
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out.println("</PRE>");
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}
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static StringBuffer appendChar(StringBuffer buffer, int ch) {
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if (ch > 32 && ch < 0x7F) {
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switch (ch) {
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case '<': buffer.append("<"); break;
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case '>': buffer.append(">"); break;
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default: buffer.append((char)ch); break;
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}
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} else {
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buffer.append("·");
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}
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return buffer;
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}
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static void printField(PrintWriter out, Object field) {
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String value = field.toString();
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if (field instanceof String) {
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// this is just a plain HEX value, print its contents as ASCII as well.
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if (value.startsWith("0x")) {
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try {
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int hexValue = Integer.parseInt(value.substring(2), 16);
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// don't interpret some common values, to save some space.
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if (hexValue != 0 && hexValue != -1) {
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StringBuffer buffer = new StringBuffer(value);
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buffer.append('\t');
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appendChar(buffer, ((hexValue >>> 24) & 0x00FF));
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appendChar(buffer, ((hexValue >>> 16) & 0x00FF));
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appendChar(buffer, ((hexValue >>> 8) & 0x00FF));
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appendChar(buffer, (hexValue & 0x00FF));
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value = buffer.toString();
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}
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} catch (NumberFormatException nfe) {
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}
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}
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}
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out.println("\t" + value);
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}
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static void printLeaks(PrintWriter out, Leak[] leaks) throws IOException {
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// sort the leaks by total size.
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QuickSort bySize = new QuickSort(new Leak.ByTotalSize());
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bySize.sort(leaks);
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out.println("<H2>Leak Roots</H2>");
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out.println("<PRE>");
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int leakCount = leaks.length;
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for (int i = 0; i < leakCount; i++) {
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Leak leak = leaks[i];
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if (leak.mRefCount == 0)
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out.println(leak);
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}
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Type anchorType = null;
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// now, print the report, sorted by type size.
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for (int i = 0; i < leakCount; i++) {
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Leak leak = leaks[i];
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if (anchorType != leak.mType) {
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anchorType = leak.mType;
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out.println("\n<HR>");
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out.println("<A NAME=\"" + anchorType.mName + "_" + anchorType.mSize + "\"></A>");
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out.println("<H3>" + anchorType + " Leaks</H3>");
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}
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out.println("<A NAME=\"" + leak.mAddress + "\"></A>");
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if (leak.mParents != null) {
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out.print(leak);
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out.println(" <A HREF=\"#" + leak.mAddress + "_parents\">parents</A>");
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} else {
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out.println(leak);
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}
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// print object's fields:
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Object[] refs = leak.mReferences;
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int count = refs.length;
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for (int j = 0; j < count; j++)
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printField(out, refs[j]);
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// print object's stack crawl:
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Object[] crawl = leak.mCrawl;
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count = crawl.length;
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for (int j = 0; j < count; j++) {
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String location = FileLocator.getFileLocation((String) crawl[j]);
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out.println(location);
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}
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// print object's parents.
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if (leak.mParents != null) {
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out.println("<A NAME=\"" + leak.mAddress + "_parents\"></A>");
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out.println("\nLeak Parents:");
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Leak[] parents = leak.mParents;
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count = parents.length;
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for (int j = 0; j < count; j++)
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out.println("\t" + parents[j]);
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}
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}
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out.println("</PRE>");
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}
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static void printRootLeaks(PrintWriter out, Leak[] leaks) throws IOException {
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// sort the leaks by total size.
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QuickSort bySize = new QuickSort(new Leak.ByTotalSize());
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bySize.sort(leaks);
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out.println("<H2>Leak Roots Only</H2>");
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out.println("<PRE>");
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int leakCount = leaks.length;
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for (int i = 0; i < leakCount; i++) {
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Leak leak = leaks[i];
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if (leak.mRefCount == 0)
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out.println(leak);
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}
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Type anchorType = null;
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// now, print just the root leaks.
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for (int i = 0; i < leakCount; i++) {
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Leak leak = leaks[i];
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if (leak.mRefCount > 0)
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continue;
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if (anchorType != leak.mType) {
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anchorType = leak.mType;
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out.println("\n<HR>");
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out.println("<A NAME=\"" + anchorType.mName + "_" + anchorType.mSize + "\"></A>");
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out.println("<H3>" + anchorType + " Leaks</H3>");
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}
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out.println("<A NAME=\"" + leak.mAddress + "\"></A>");
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out.println(leak);
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// print object's fields:
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Object[] refs = leak.mReferences;
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int count = refs.length;
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for (int j = 0; j < count; j++)
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printField(out, refs[j]);
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// print object's stack crawl:
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Object[] crawl = leak.mCrawl;
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count = crawl.length;
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for (int j = 0; j < count; j++) {
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String location = FileLocator.getFileLocation((String) crawl[j]);
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out.println(location);
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}
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}
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out.println("</PRE>");
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}
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}
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