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410 lines
17 KiB
Java
410 lines
17 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 or
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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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public class bloatsoup {
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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: bloatsoup trace");
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System.exit(1);
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}
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FileLocator.USE_BLAME = true;
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for (int i = 0; i < args.length; i++) {
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cook(args[i]);
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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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/**
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* An Entry is created for every object in the bloat report.
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*/
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static class Entry {
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String mAddress;
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Type mType;
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Object[] mReferences;
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CallTree.Node mCrawl;
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int mCrawlID;
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int mRefCount;
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Entry[] mParents;
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int mTotalSize;
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Entry(String addr, Type type, Object[] refs, CallTree.Node crawl) {
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mAddress = addr;
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mReferences = refs;
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mCrawl = crawl;
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mCrawlID = crawl.id;
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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 Entry[parents.size()];
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parents.copyInto(mParents);
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}
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public String toString() {
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String typeName = mType.mName;
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int typeSize = mType.mSize;
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String typeLink = "<A HREF=\"" + typeName + "_" + typeSize + ".html\"><" + typeName + "></A> (" + typeSize + ")";
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return ("<A HREF=\"" + typeName + "_" + typeSize + ".html#" + mAddress + "\" onMouseDown='return showCrawl(event,\"" + mCrawlID + "\");'>" + mAddress + "</A> [" + mRefCount + "] " + typeLink + " {" + mTotalSize + "}");
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}
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}
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static class ByTypeBloat extends QuickSort.Comparator {
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Histogram hist;
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ByTypeBloat(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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Entry e1 = (Entry) obj1, e2 = (Entry) obj2;
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Type t1 = e1.mType, t2 = e2.mType;
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return (hist.count(t2) * t2.mSize - hist.count(t1) * t1.mSize);
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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 extends 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, String dir) throws IOException {
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// sort the types by histogram count.
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Object[] types = hist.objects();
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QuickSort sorter = new QuickSort(new HistComparator(hist));
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sorter.sort(types);
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out.println("<PRE>");
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int index = types.length;
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while (index > 0) {
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Type type = (Type) types[--index];
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int count = hist.count(type);
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String name = type.mName;
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int size = type.mSize;
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out.print("<A HREF=\"" + dir + name + "_" + size + ".html\"><" + name + "></A> (" + size + ")");
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out.println(" : " + count + " {" + (count * type.mSize) + "}");
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}
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out.println("</PRE>");
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}
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static String kStackCrawlScript =
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"var currentURL = null;\n" +
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"function showCrawl(event, crawlID) {\n" +
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" if (!(event.modifiers & Event.SHIFT_MASK)) return true;\n" +
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" var l = document.layers['popup'];\n" +
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" var docURL = document.URL;\n" +
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" var crawlURL = docURL.substring(0, docURL.lastIndexOf('/') + 1) + crawlID + '.html';\n" +
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" // alert(crawlURL);\n" +
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" if (l.visibility == 'hide' || currentURL != crawlURL) {\n" +
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" if (currentURL != crawlURL) {\n" +
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" l.load(crawlURL, 800);\n" +
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" currentURL = crawlURL;\n" +
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" }\n" +
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" l.top = event.target.y + 15;\n" +
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" l.left = event.target.x + 30;\n" +
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" l.visibility='show';\n" +
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" } else {\n" +
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" l.visibility = 'hide';\n" +
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" }\n" +
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" return false;\n" +
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"}\n" +
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"";
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static String kStackCrawlPrefix =
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"<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=3><TR><TD BGCOLOR=#00A000>\n" +
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"<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=6><TR><TD BGCOLOR=#FFFFFF>\n" +
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"<PRE>\n" +
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"";
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static String kStackCrawlSuffix =
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"</PRE>\n" +
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"</TD></TR></TABLE>\n" +
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"</TD></TR></TABLE>\n" +
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"";
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/**
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* Initially, just create a histogram of the bloat.
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*/
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static void cook(String inputName) {
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String outputName = inputName + ".html";
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String contentsDir = inputName + ".contents/";
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try {
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int objectCount = 0;
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long totalSize = 0;
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StringTable strings = new StringTable();
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strings.internAs("void*", "void");
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Hashtable types = new Hashtable();
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Histogram hist = new Histogram();
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CallTree calls = new CallTree(strings);
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Hashtable entriesTable = new Hashtable();
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Vector vec = new Vector();
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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 = strings.intern(line.substring(0, 10));
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String name = strings.intern(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(')'));
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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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String key = strings.intern(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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hist.record(type);
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++objectCount;
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totalSize += size;
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line = reader.readLine();
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// process references (optional).
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Object[] refs = null;
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if (line != null && line.charAt(0) == '\t') {
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vec.setSize(0);
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do {
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vec.addElement(strings.intern(line.substring(1, 11)));
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line = reader.readLine();
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} while (line != null && line.charAt(0) == '\t');
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refs = new Object[vec.size()];
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vec.copyInto(refs);
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}
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// process stack crawl (optional).
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CallTree.Node crawl = null;
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if (line != null && line.charAt(0) == '<') {
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do {
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crawl = calls.parseNode(line);
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line = reader.readLine();
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} while (line != null && line.charAt(0) == '<');
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}
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entriesTable.put(addr, new Entry(addr, type, refs, crawl));
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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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// build the entries array & graph.
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Entry[] entries = new Entry[objectCount];
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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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{
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Hashtable parentTable = new Hashtable();
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int entryIndex = 0;
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Enumeration e = entriesTable.elements();
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while (e.hasMoreElements()) {
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Entry entry = (Entry) e.nextElement();
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Object[] refs = entry.mReferences;
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if (refs != null) {
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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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Entry ref = (Entry) entriesTable.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 entry 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(entry);
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}
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}
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}
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entries[entryIndex++] = entry;
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}
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// be nice to the GC.
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entriesTable.clear();
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entriesTable = null;
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// set the parents of each entry.
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e = parentTable.keys();
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while (e.hasMoreElements()) {
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Entry entry = (Entry) e.nextElement();
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Vector parents = (Vector) parentTable.get(entry);
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if (parents != null)
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entry.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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}
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// Sort the entries by type bloat.
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{
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QuickSort sorter = new QuickSort(new ByTypeBloat(hist));
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sorter.sort(entries);
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}
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// Create the bloat summary report.
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PrintWriter writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outputName))));
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Date now = new Date();
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writer.println("<HTML><HEAD><TITLE>Bloat Summary as of: " + now + "</TITLE></HEAD>");
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// print bloat summary.
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writer.println("<H2>Bloat Summary</H2>");
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writer.println("total object count = " + objectCount + "<BR>");
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writer.println("total memory bloat = " + totalSize + " bytes.<BR>");
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// print histogram sorted by count * size.
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writer.println("<H2>Bloat Histogram</H2>");
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printHistogram(writer, hist, contentsDir);
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writer.println("</BODY></HTML>");
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writer.close();
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writer = null;
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// ensure the contents directory has been created.
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File contentsFile = new File(inputName + ".contents");
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if (!contentsFile.exists())
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contentsFile.mkdir();
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// create the stack crawl script.
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outputName = contentsDir + "showCrawl.js";
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writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outputName))));
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writer.print(kStackCrawlScript);
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writer.close();
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writer = null;
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// print the Entries graph.
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int length = entries.length;
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Type anchorType = null;
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for (int i = 0; i < length; ++i) {
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Entry entry = entries[i];
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if (anchorType != entry.mType) {
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if (writer != null) {
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writer.println("</PRE>");
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writer.close();
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}
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anchorType = entry.mType;
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outputName = contentsDir + anchorType.mName + "_" + anchorType.mSize + ".html";
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writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outputName))));
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// set up the stack crawl script. use a <LAYER> on Communicator 4.X, a separate
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// window on other browsers.
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writer.println("<TITLE><" + anchorType.mName + "> (" + anchorType.mSize + ")</TITLE>");
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writer.println("<SCRIPT src='showCrawl.js'></SCRIPT>");
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writer.println("<LAYER NAME='popup' LEFT=0 TOP=0 BGCOLOR='#FFFFFF' VISIBILITY='hide'></LAYER>");
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writer.println("<A NAME=\"" + anchorType.mName + "_" + anchorType.mSize + "\"></A>");
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writer.println("<H3>" + anchorType + " Bloat</H3>");
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writer.println("<PRE>");
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}
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writer.println("<A NAME=\"" + entry.mAddress + "\"></A>");
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if (entry.mParents != null) {
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writer.print(entry);
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writer.println(" <A HREF=\"#" + entry.mAddress + "_parents\">parents</A>");
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} else {
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writer.println(entry);
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}
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// print object's fields:
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Object[] refs = entry.mReferences;
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if (refs != null) {
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int count = refs.length;
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for (int j = 0; j < count; ++j)
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leaksoup.printField(writer, refs[j]);
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}
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// print object's stack crawl, if it hasn't been printed already.
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CallTree.Node crawl = entry.mCrawl;
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int crawlID = crawl.id;
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if (crawlID > 0) {
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// encode already printed by negating the crawl id.
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crawl.id = -crawlID;
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File crawlFile = new File(contentsDir + crawlID + ".html");
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if (! crawlFile.exists()) {
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PrintWriter crawlWriter = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(crawlFile))));
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crawlWriter.print(kStackCrawlPrefix);
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while (crawl != null) {
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String location = FileLocator.getFileLocation(crawl.data);
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crawlWriter.println(location);
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crawl = crawl.parent;
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}
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crawlWriter.print(kStackCrawlSuffix);
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crawlWriter.close();
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}
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}
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// print object's parents.
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if (entry.mParents != null) {
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writer.println("<A NAME=\"" + entry.mAddress + "_parents\"></A>");
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writer.println("\nObject Parents:");
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Entry[] parents = entry.mParents;
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int count = parents.length;
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for (int j = 0; j < count; ++j)
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writer.println("\t" + parents[j]);
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}
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}
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if (writer != null) {
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writer.println("</PRE>");
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writer.close();
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}
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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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