6745225: Memory leak while drawing Attributed String

Reviewed-by: jgodinez, dougfelt

src/share/classes/sun/font/FileFontStrike.java

@@ -26,6 +26,7 @@
 package sun.font;
 
 import java.lang.ref.SoftReference;
+import java.lang.ref.WeakReference;
 import java.awt.Font;
 import java.awt.GraphicsEnvironment;
 import java.awt.Rectangle;
@@ -842,15 +843,29 @@ public class FileFontStrike extends PhysicalStrike {
         return fileFont.getGlyphOutlineBounds(pScalerContext, glyphCode);
     }
 
-    private ConcurrentHashMap<Integer, GeneralPath> outlineMap;
+    private
+        WeakReference<ConcurrentHashMap<Integer,GeneralPath>> outlineMapRef;
 
     GeneralPath getGlyphOutline(int glyphCode, float x, float y) {
-        if (outlineMap == null) {
-            outlineMap = new ConcurrentHashMap<Integer, GeneralPath>();
+
+        GeneralPath gp = null;
+        ConcurrentHashMap<Integer, GeneralPath> outlineMap = null;
+
+        if (outlineMapRef != null) {
+            outlineMap = outlineMapRef.get();
+            if (outlineMap != null) {
+                gp = (GeneralPath)outlineMap.get(glyphCode);
+            }
         }
-        GeneralPath gp = (GeneralPath)outlineMap.get(glyphCode);
+
         if (gp == null) {
             gp = fileFont.getGlyphOutline(pScalerContext, glyphCode, 0, 0);
+            if (outlineMap == null) {
+                outlineMap = new ConcurrentHashMap<Integer, GeneralPath>();
+                outlineMapRef =
+                   new WeakReference
+                       <ConcurrentHashMap<Integer,GeneralPath>>(outlineMap);
+            }
             outlineMap.put(glyphCode, gp);
         }
         gp = (GeneralPath)gp.clone(); // mutable!

src/share/classes/sun/font/GlyphLayout.java

@@ -338,6 +338,8 @@ public final class GlyphLayout {
                     cache = new ConcurrentHashMap<SDKey, SDCache>(10);
                     cacheRef = new
                        SoftReference<ConcurrentHashMap<SDKey, SDCache>>(cache);
+                } else if (cache.size() >= 512) {
+                    cache.clear();
                 }
                 cache.put(key, res);
             }

test/java/awt/font/LineBreakMeasurer/FRCTest.java

+/*
+ * Copyright 2008-9 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6448405 6519513 6745225
+ * @summary static HashMap cache in LineBreakMeasurer can grow wihout bounds
+ * @run main/othervm/timeout=600 -client -Xms16m -Xmx16m FRCTest
+ */
+import java.awt.*;
+import java.awt.image.*;
+import java.awt.font.*;
+import java.awt.geom.*;
+import java.text.*;
+import java.util.Hashtable;
+
+public class FRCTest {
+
+    static AttributedString vanGogh = new AttributedString(
+        "Many people believe that Vincent van Gogh painted his best works " +
+        "during the two-year period he spent in Provence. Here is where he " +
+        "painted The Starry Night--which some consider to be his greatest " +
+        "work of all. However, as his artistic brilliance reached new " +
+        "heights in Provence, his physical and mental health plummeted. ",
+        new Hashtable());
+
+    public static void main(String[] args) {
+
+        // First test the behaviour of Graphics2D.getFontRenderContext();
+        BufferedImage bi = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);
+        Graphics2D g2d = bi.createGraphics();
+        AffineTransform g2dTx = new AffineTransform(2,0,2,0,1,1);
+        g2d.setTransform(g2dTx);
+        AffineTransform frcTx = g2d.getFontRenderContext().getTransform();
+        AffineTransform frcExpected = new AffineTransform(2,0,2,0,0,0);
+        if (!frcTx.equals(frcExpected)) {
+            throw new RuntimeException("FRC Tx may have translate?");
+        }
+
+        // Now test that using different translates with LBM is OK
+        // This test doesn't prove a lot since showing a leak really
+        // requires a basher test that can run for a long time.
+        for (int x=0;x<100;x++) {
+            for (int y=0;y<100;y++) {
+                AttributedCharacterIterator aci = vanGogh.getIterator();
+                AffineTransform tx = AffineTransform.getTranslateInstance(x, y);
+                FontRenderContext frc = new FontRenderContext(tx, false, false);
+                LineBreakMeasurer lbm = new LineBreakMeasurer(aci, frc);
+                lbm.setPosition(aci.getBeginIndex());
+                while (lbm.getPosition() < aci.getEndIndex()) {
+                    lbm.nextLayout(100f);
+                }
+            }
+        }
+
+        for (int x=0;x<25;x++) {
+            for (int y=0;y<25;y++) {
+                AttributedCharacterIterator aci = vanGogh.getIterator();
+                double rot = Math.random()*.4*Math.PI - .2*Math.PI;
+                AffineTransform tx = AffineTransform.getRotateInstance(rot);
+                FontRenderContext frc = new FontRenderContext(tx, false, false);
+                LineBreakMeasurer lbm = new LineBreakMeasurer(aci, frc);
+                lbm.setPosition(aci.getBeginIndex());
+                while (lbm.getPosition() < aci.getEndIndex()) {
+                    lbm.nextLayout(100f);
+                }
+            }
+        }
+    }
+}